misc/libtremor/tremor/vorbisfile.c
author koda
Tue, 04 Dec 2012 01:51:57 +0100
changeset 8209 780e156f19ea
parent 7941 1e8b7fc8f90d
permissions -rw-r--r--
first merge
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/********************************************************************
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 *                                                                  *
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 * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE.   *
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 *                                                                  *
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 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
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 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
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 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
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 *                                                                  *
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 * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003    *
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 * BY THE Xiph.Org FOUNDATION http://www.xiph.org/                  *
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 *                                                                  *
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 ********************************************************************
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 function: stdio-based convenience library for opening/seeking/decoding
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 last mod: $Id: vorbisfile.c,v 1.6 2003/03/30 23:40:56 xiphmont Exp $
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 ********************************************************************/
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <math.h>
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#include "ivorbiscodec.h"
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#include "ivorbisfile.h"
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#include "misc.h"
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/* A 'chained bitstream' is a Vorbis bitstream that contains more than
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   one logical bitstream arranged end to end (the only form of Ogg
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   multiplexing allowed in a Vorbis bitstream; grouping [parallel
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   multiplexing] is not allowed in Vorbis) */
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/* A Vorbis file can be played beginning to end (streamed) without
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   worrying ahead of time about chaining (see decoder_example.c).  If
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   we have the whole file, however, and want random access
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   (seeking/scrubbing) or desire to know the total length/time of a
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   file, we need to account for the possibility of chaining. */
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/* We can handle things a number of ways; we can determine the entire
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   bitstream structure right off the bat, or find pieces on demand.
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   This example determines and caches structure for the entire
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   bitstream, but builds a virtual decoder on the fly when moving
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   between links in the chain. */
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/* There are also different ways to implement seeking.  Enough
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   information exists in an Ogg bitstream to seek to
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   sample-granularity positions in the output.  Or, one can seek by
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   picking some portion of the stream roughly in the desired area if
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   we only want coarse navigation through the stream. */
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/*************************************************************************
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 * Many, many internal helpers.  The intention is not to be confusing; 
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 * rampant duplication and monolithic function implementation would be 
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 * harder to understand anyway.  The high level functions are last.  Begin
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 * grokking near the end of the file */
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/* read a little more data from the file/pipe into the ogg_sync framer */
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static long _get_data(OggVorbis_File *vf){
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  errno=0;
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  if(vf->datasource){
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    unsigned char *buffer=ogg_sync_bufferin(vf->oy,CHUNKSIZE);
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    long bytes=(vf->callbacks.read_func)(buffer,1,CHUNKSIZE,vf->datasource);
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    if(bytes>0)ogg_sync_wrote(vf->oy,bytes);
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    if(bytes==0 && errno)return(-1);
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    return(bytes);
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  }else
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    return(0);
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}
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/* save a tiny smidge of verbosity to make the code more readable */
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static void _seek_helper(OggVorbis_File *vf,ogg_int64_t offset){
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  if(vf->datasource){ 
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    (vf->callbacks.seek_func)(vf->datasource, offset, SEEK_SET);
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    vf->offset=offset;
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    ogg_sync_reset(vf->oy);
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  }else{
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    /* shouldn't happen unless someone writes a broken callback */
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    return;
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  }
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}
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/* The read/seek functions track absolute position within the stream */
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/* from the head of the stream, get the next page.  boundary specifies
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   if the function is allowed to fetch more data from the stream (and
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   how much) or only use internally buffered data.
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   boundary: -1) unbounded search
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              0) read no additional data; use cached only
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	      n) search for a new page beginning for n bytes
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   return:   <0) did not find a page (OV_FALSE, OV_EOF, OV_EREAD)
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              n) found a page at absolute offset n 
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              produces a refcounted page */
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static ogg_int64_t _get_next_page(OggVorbis_File *vf,ogg_page *og,
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				  ogg_int64_t boundary){
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  if(boundary>0)boundary+=vf->offset;
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  while(1){
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    long more;
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    if(boundary>0 && vf->offset>=boundary)return(OV_FALSE);
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    more=ogg_sync_pageseek(vf->oy,og);
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    if(more<0){
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      /* skipped n bytes */
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      vf->offset-=more;
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    }else{
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      if(more==0){
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	/* send more paramedics */
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	if(!boundary)return(OV_FALSE);
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	{
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	  long ret=_get_data(vf);
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	  if(ret==0)return(OV_EOF);
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	  if(ret<0)return(OV_EREAD);
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	}
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      }else{
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	/* got a page.  Return the offset at the page beginning,
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           advance the internal offset past the page end */
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	ogg_int64_t ret=vf->offset;
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	vf->offset+=more;
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	return(ret);
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      }
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    }
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  }
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}
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/* find the latest page beginning before the current stream cursor
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   position. Much dirtier than the above as Ogg doesn't have any
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   backward search linkage.  no 'readp' as it will certainly have to
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   read. */
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/* returns offset or OV_EREAD, OV_FAULT and produces a refcounted page */
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static ogg_int64_t _get_prev_page(OggVorbis_File *vf,ogg_page *og){
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  ogg_int64_t begin=vf->offset;
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  ogg_int64_t end=begin;
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  ogg_int64_t ret;
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  ogg_int64_t offset=-1;
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  while(offset==-1){
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    begin-=CHUNKSIZE;
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    if(begin<0)
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      begin=0;
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    _seek_helper(vf,begin);
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    while(vf->offset<end){
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      ret=_get_next_page(vf,og,end-vf->offset);
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      if(ret==OV_EREAD)return(OV_EREAD);
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      if(ret<0){
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   154
	break;
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      }else{
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	offset=ret;
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      }
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   158
    }
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   159
  }
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  /* we have the offset.  Actually snork and hold the page now */
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  _seek_helper(vf,offset);
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  ret=_get_next_page(vf,og,CHUNKSIZE);
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  if(ret<0)
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    /* this shouldn't be possible */
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    return(OV_EFAULT);
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  return(offset);
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}
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/* finds each bitstream link one at a time using a bisection search
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   (has to begin by knowing the offset of the lb's initial page).
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   Recurses for each link so it can alloc the link storage after
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   finding them all, then unroll and fill the cache at the same time */
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static int _bisect_forward_serialno(OggVorbis_File *vf,
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				    ogg_int64_t begin,
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				    ogg_int64_t searched,
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				    ogg_int64_t end,
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				    ogg_uint32_t currentno,
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				    long m){
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  ogg_int64_t endsearched=end;
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  ogg_int64_t next=end;
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  ogg_page og={0,0,0,0};
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  ogg_int64_t ret;
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  /* the below guards against garbage seperating the last and
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     first pages of two links. */
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   188
  while(searched<endsearched){
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   189
    ogg_int64_t bisect;
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   190
    
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    if(endsearched-searched<CHUNKSIZE){
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      bisect=searched;
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   193
    }else{
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      bisect=(searched+endsearched)/2;
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   195
    }
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   196
    
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    _seek_helper(vf,bisect);
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    ret=_get_next_page(vf,&og,-1);
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   199
    if(ret==OV_EREAD)return(OV_EREAD);
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   200
    if(ret<0 || ogg_page_serialno(&og)!=currentno){
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      endsearched=bisect;
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      if(ret>=0)next=ret;
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   203
    }else{
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      searched=ret+og.header_len+og.body_len;
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   205
    }
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   206
    ogg_page_release(&og);
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   207
  }
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   208
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   209
  _seek_helper(vf,next);
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   210
  ret=_get_next_page(vf,&og,-1);
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   211
  if(ret==OV_EREAD)return(OV_EREAD);
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   212
  
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   213
  if(searched>=end || ret<0){
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   214
    ogg_page_release(&og);
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   215
    vf->links=m+1;
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   216
    vf->offsets=_ogg_malloc((vf->links+1)*sizeof(*vf->offsets));
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    vf->serialnos=_ogg_malloc(vf->links*sizeof(*vf->serialnos));
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   218
    vf->offsets[m+1]=searched;
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diff changeset
   219
  }else{
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   220
    ret=_bisect_forward_serialno(vf,next,vf->offset,
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   221
				 end,ogg_page_serialno(&og),m+1);
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   222
    ogg_page_release(&og);
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   223
    if(ret==OV_EREAD)return(OV_EREAD);
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   224
  }
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   225
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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   226
  vf->offsets[m]=begin;
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   227
  vf->serialnos[m]=currentno;
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   228
  return(0);
5170
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diff changeset
   229
}
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   230
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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   231
/* uses the local ogg_stream storage in vf; this is important for
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   232
   non-streaming input sources */
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   233
/* consumes the page that's passed in (if any) */
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diff changeset
   234
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   235
static int _fetch_headers(OggVorbis_File *vf,
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koda
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   236
			  vorbis_info *vi,
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   237
			  vorbis_comment *vc,
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koda
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   238
			  ogg_uint32_t *serialno,
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   239
			  ogg_page *og_ptr){
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   240
  ogg_page og={0,0,0,0};
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   241
  ogg_packet op={0,0,0,0,0,0};
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   242
  int i,ret;
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   243
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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   244
  if(!og_ptr){
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   245
    ogg_int64_t llret=_get_next_page(vf,&og,CHUNKSIZE);
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   246
    if(llret==OV_EREAD)return(OV_EREAD);
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   247
    if(llret<0)return OV_ENOTVORBIS;
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   248
    og_ptr=&og;
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diff changeset
   249
  }
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   250
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   251
  ogg_stream_reset_serialno(vf->os,ogg_page_serialno(og_ptr));
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   252
  if(serialno)*serialno=vf->os->serialno;
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   253
  vf->ready_state=STREAMSET;
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   254
  
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   255
  /* extract the initial header from the first page and verify that the
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   256
     Ogg bitstream is in fact Vorbis data */
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   257
  
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   258
  vorbis_info_init(vi);
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koda
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   259
  vorbis_comment_init(vc);
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   260
  
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   261
  i=0;
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   262
  while(i<3){
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   263
    ogg_stream_pagein(vf->os,og_ptr);
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koda
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diff changeset
   264
    while(i<3){
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   265
      int result=ogg_stream_packetout(vf->os,&op);
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   266
      if(result==0)break;
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diff changeset
   267
      if(result==-1){
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   268
	ret=OV_EBADHEADER;
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koda
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   269
	goto bail_header;
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diff changeset
   270
      }
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   271
      if((ret=vorbis_synthesis_headerin(vi,vc,&op))){
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   272
	goto bail_header;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   273
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   274
      i++;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   275
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   276
    if(i<3)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   277
      if(_get_next_page(vf,og_ptr,CHUNKSIZE)<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   278
	ret=OV_EBADHEADER;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   279
	goto bail_header;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   280
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   281
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   282
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   283
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   284
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   285
  return 0; 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   286
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   287
 bail_header:
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   288
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   289
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   290
  vorbis_info_clear(vi);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   291
  vorbis_comment_clear(vc);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   292
  vf->ready_state=OPENED;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   293
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   294
  return ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   295
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
diff changeset
   296
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   297
/* last step of the OggVorbis_File initialization; get all the
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diff changeset
   298
   vorbis_info structs and PCM positions.  Only called by the seekable
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diff changeset
   299
   initialization (local stream storage is hacked slightly; pay
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
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diff changeset
   300
   attention to how that's done) */
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   301
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   302
/* this is void and does not propogate errors up because we want to be
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   303
   able to open and use damaged bitstreams as well as we can.  Just
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   304
   watch out for missing information for links in the OggVorbis_File
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   305
   struct */
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diff changeset
   306
static void _prefetch_all_headers(OggVorbis_File *vf, ogg_int64_t dataoffset){
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   307
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   308
  int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   309
  ogg_int64_t ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   310
  
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parents: 7697
diff changeset
   311
  vf->vi=_ogg_realloc(vf->vi,vf->links*sizeof(*vf->vi));
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diff changeset
   312
  vf->vc=_ogg_realloc(vf->vc,vf->links*sizeof(*vf->vc));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   313
  vf->dataoffsets=_ogg_malloc(vf->links*sizeof(*vf->dataoffsets));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   314
  vf->pcmlengths=_ogg_malloc(vf->links*2*sizeof(*vf->pcmlengths));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   315
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   316
  for(i=0;i<vf->links;i++){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   317
    if(i==0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   318
      /* we already grabbed the initial header earlier.  Just set the offset */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   319
      vf->dataoffsets[i]=dataoffset;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   320
      _seek_helper(vf,dataoffset);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   321
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   322
    }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   323
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   324
      /* seek to the location of the initial header */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   325
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   326
      _seek_helper(vf,vf->offsets[i]);
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a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
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parents: 7697
diff changeset
   327
      if(_fetch_headers(vf,vf->vi+i,vf->vc+i,NULL,NULL)<0){
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   328
    	vf->dataoffsets[i]=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   329
      }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   330
	vf->dataoffsets[i]=vf->offset;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   331
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   332
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   333
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   334
    /* fetch beginning PCM offset */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   335
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   336
    if(vf->dataoffsets[i]!=-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   337
      ogg_int64_t accumulated=0,pos;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   338
      long        lastblock=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   339
      int         result;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   340
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   341
      ogg_stream_reset_serialno(vf->os,vf->serialnos[i]);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   342
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   343
      while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   344
	ogg_packet op={0,0,0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   345
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   346
	ret=_get_next_page(vf,&og,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   347
	if(ret<0)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   348
	  /* this should not be possible unless the file is
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   349
             truncated/mangled */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   350
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   351
       
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   352
	if(ogg_page_serialno(&og)!=vf->serialnos[i])
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   353
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   354
	
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   355
	pos=ogg_page_granulepos(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   356
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   357
	/* count blocksizes of all frames in the page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   358
	ogg_stream_pagein(vf->os,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   359
	while((result=ogg_stream_packetout(vf->os,&op))){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   360
	  if(result>0){ /* ignore holes */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   361
	    long thisblock=vorbis_packet_blocksize(vf->vi+i,&op);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   362
	    if(lastblock!=-1)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   363
	      accumulated+=(lastblock+thisblock)>>2;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   364
	    lastblock=thisblock;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   365
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   366
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   367
	ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   368
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   369
	if(pos!=-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   370
	  /* pcm offset of last packet on the first audio page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   371
	  accumulated= pos-accumulated;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   372
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   373
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   374
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   375
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   376
      /* less than zero?  This is a stream with samples trimmed off
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   377
         the beginning, a normal occurrence; set the offset to zero */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   378
      if(accumulated<0)accumulated=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   379
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   380
      vf->pcmlengths[i*2]=accumulated;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   381
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   382
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   383
    /* get the PCM length of this link. To do this,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   384
       get the last page of the stream */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   385
    {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   386
      ogg_int64_t end=vf->offsets[i+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   387
      _seek_helper(vf,end);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   388
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   389
      while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   390
	ret=_get_prev_page(vf,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   391
	if(ret<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   392
	  /* this should not be possible */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   393
	  vorbis_info_clear(vf->vi+i);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   394
	  vorbis_comment_clear(vf->vc+i);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   395
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   396
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   397
	if(ogg_page_granulepos(&og)!=-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   398
	  vf->pcmlengths[i*2+1]=ogg_page_granulepos(&og)-vf->pcmlengths[i*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   399
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   400
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   401
	vf->offset=ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   402
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   403
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   404
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   405
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   406
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   407
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   408
static void _make_decode_ready(OggVorbis_File *vf){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   409
  if(vf->ready_state!=STREAMSET)return;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   410
  if(vf->seekable){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   411
    vorbis_synthesis_init(&vf->vd,vf->vi+vf->current_link);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   412
  }else{
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   413
    vorbis_synthesis_init(&vf->vd,vf->vi);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   414
  }    
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   415
  vorbis_block_init(&vf->vd,&vf->vb);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   416
  vf->ready_state=INITSET;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   417
  vf->bittrack=0;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   418
  vf->samptrack=0;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   419
  return;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   420
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   421
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   422
static int _open_seekable2(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   423
  ogg_uint32_t serialno=vf->current_serialno;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   424
  ogg_uint32_t tempserialno;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   425
  ogg_int64_t dataoffset=vf->offset, end;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   426
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   427
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   428
  /* we're partially open and have a first link header state in
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   429
     storage in vf */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   430
  /* we can seek, so set out learning all about this file */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   431
  (vf->callbacks.seek_func)(vf->datasource,0,SEEK_END);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   432
  vf->offset=vf->end=(vf->callbacks.tell_func)(vf->datasource);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   433
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   434
  /* We get the offset for the last page of the physical bitstream.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   435
     Most OggVorbis files will contain a single logical bitstream */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   436
  end=_get_prev_page(vf,&og);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   437
  if(end<0)return(end);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   438
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   439
  /* more than one logical bitstream? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   440
  tempserialno=ogg_page_serialno(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   441
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   442
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   443
  if(tempserialno!=serialno){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   444
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   445
    /* Chained bitstream. Bisect-search each logical bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   446
       section.  Do so based on serial number only */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   447
    if(_bisect_forward_serialno(vf,0,0,end+1,serialno,0)<0)return(OV_EREAD);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   448
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   449
  }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   450
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   451
    /* Only one logical bitstream */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   452
    if(_bisect_forward_serialno(vf,0,end,end+1,serialno,0))return(OV_EREAD);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   453
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   454
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   455
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   456
  /* the initial header memory is referenced by vf after; don't free it */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   457
  _prefetch_all_headers(vf,dataoffset);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   458
  return(ov_raw_seek(vf,0));
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   459
}
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   460
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   461
/* clear out the current logical bitstream decoder */ 
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   462
static void _decode_clear(OggVorbis_File *vf){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   463
  vorbis_dsp_clear(&vf->vd);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   464
  vorbis_block_clear(&vf->vb);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   465
  vf->ready_state=OPENED;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   466
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   467
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   468
/* fetch and process a packet.  Handles the case where we're at a
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   469
   bitstream boundary and dumps the decoding machine.  If the decoding
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   470
   machine is unloaded, it loads it.  It also keeps pcm_offset up to
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   471
   date (seek and read both use this.  seek uses a special hack with
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   472
   readp). 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   473
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   474
   return: <0) error, OV_HOLE (lost packet) or OV_EOF
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   475
            0) need more data (only if readp==0)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   476
	    1) got a packet 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   477
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   478
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   479
static int _fetch_and_process_packet(OggVorbis_File *vf,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   480
				     int readp,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   481
				     int spanp){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   482
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   483
  ogg_packet op={0,0,0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   484
  int ret=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   485
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   486
  /* handle one packet.  Try to fetch it from current stream state */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   487
  /* extract packets from page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   488
  while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   489
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   490
    /* process a packet if we can.  If the machine isn't loaded,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   491
       neither is a page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   492
    if(vf->ready_state==INITSET){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   493
      while(1) {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   494
	int result=ogg_stream_packetout(vf->os,&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   495
	ogg_int64_t granulepos;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   496
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   497
	if(result<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   498
	  ret=OV_HOLE; /* hole in the data. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   499
	  goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   500
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   501
	if(result>0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   502
	  /* got a packet.  process it */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   503
	  granulepos=op.granulepos;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   504
	  if(!vorbis_synthesis(&vf->vb,&op,1)){ /* lazy check for lazy
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   505
						      header handling.  The
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   506
						      header packets aren't
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   507
						      audio, so if/when we
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   508
						      submit them,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   509
						      vorbis_synthesis will
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   510
						      reject them */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   511
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   512
	    /* suck in the synthesis data and track bitrate */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   513
	    {
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   514
	      int oldsamples=vorbis_synthesis_pcmout(&vf->vd,NULL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   515
	      /* for proper use of libvorbis within libvorbisfile,
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   516
                 oldsamples will always be zero. */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   517
	      if(oldsamples){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   518
		ret=OV_EFAULT;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   519
		goto cleanup;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   520
	      }
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   521
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   522
	      vorbis_synthesis_blockin(&vf->vd,&vf->vb);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   523
	      vf->samptrack+=vorbis_synthesis_pcmout(&vf->vd,NULL)-oldsamples;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   524
	      vf->bittrack+=op.bytes*8;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   525
	    }
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   526
	  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   527
	    /* update the pcm offset. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   528
	    if(granulepos!=-1 && !op.e_o_s){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   529
	      int link=(vf->seekable?vf->current_link:0);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   530
	      int i,samples;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   531
	    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   532
	      /* this packet has a pcm_offset on it (the last packet
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   533
	         completed on a page carries the offset) After processing
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   534
	         (above), we know the pcm position of the *last* sample
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   535
	         ready to be returned. Find the offset of the *first*
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   536
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   537
	         As an aside, this trick is inaccurate if we begin
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   538
	         reading anew right at the last page; the end-of-stream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   539
	         granulepos declares the last frame in the stream, and the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   540
	         last packet of the last page may be a partial frame.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   541
	         So, we need a previous granulepos from an in-sequence page
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   542
	         to have a reference point.  Thus the !op.e_o_s clause
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   543
	         above */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   544
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   545
	      if(vf->seekable && link>0)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   546
		granulepos-=vf->pcmlengths[link*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   547
	      if(granulepos<0)granulepos=0; /* actually, this
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   548
					       shouldn't be possible
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   549
					       here unless the stream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   550
					       is very broken */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   551
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   552
	      samples=vorbis_synthesis_pcmout(&vf->vd,NULL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   553
	    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   554
	      granulepos-=samples;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   555
	      for(i=0;i<link;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   556
	        granulepos+=vf->pcmlengths[i*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   557
	      vf->pcm_offset=granulepos;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   558
	    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   559
	    ret=1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   560
	    goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   561
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   562
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   563
	else 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   564
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   565
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   566
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   567
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   568
    if(vf->ready_state>=OPENED){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   569
      int ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   570
      if(!readp){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   571
	ret=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   572
	goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   573
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   574
      if((ret=_get_next_page(vf,&og,-1))<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   575
	ret=OV_EOF; /* eof. leave unitialized */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   576
	goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   577
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   578
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   579
	/* bitrate tracking; add the header's bytes here, the body bytes
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   580
	   are done by packet above */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   581
      vf->bittrack+=og.header_len*8;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   582
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   583
      /* has our decoding just traversed a bitstream boundary? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   584
      if(vf->ready_state==INITSET){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   585
	if(vf->current_serialno!=ogg_page_serialno(&og)){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   586
	  if(!spanp){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   587
	    ret=OV_EOF;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   588
	    goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   589
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   590
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   591
	  _decode_clear(vf);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   592
	  
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   593
	  if(!vf->seekable){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   594
	    vorbis_info_clear(vf->vi);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   595
	    vorbis_comment_clear(vf->vc);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   596
	  }
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   597
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   598
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   599
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   600
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   601
    /* Do we need to load a new machine before submitting the page? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   602
    /* This is different in the seekable and non-seekable cases.  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   603
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   604
       In the seekable case, we already have all the header
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   605
       information loaded and cached; we just initialize the machine
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   606
       with it and continue on our merry way.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   607
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   608
       In the non-seekable (streaming) case, we'll only be at a
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   609
       boundary if we just left the previous logical bitstream and
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   610
       we're now nominally at the header of the next bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   611
    */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   612
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   613
    if(vf->ready_state!=INITSET){ 
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   614
      int link;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   615
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   616
      if(vf->ready_state<STREAMSET){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   617
	if(vf->seekable){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   618
	  vf->current_serialno=ogg_page_serialno(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   619
	  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   620
	  /* match the serialno to bitstream section.  We use this rather than
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   621
	     offset positions to avoid problems near logical bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   622
	     boundaries */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   623
	  for(link=0;link<vf->links;link++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   624
	    if(vf->serialnos[link]==vf->current_serialno)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   625
	  if(link==vf->links){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   626
	    ret=OV_EBADLINK; /* sign of a bogus stream.  error out,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   627
				leave machine uninitialized */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   628
	    goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   629
	  }
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   630
	  
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   631
	  vf->current_link=link;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   632
	  
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   633
	  ogg_stream_reset_serialno(vf->os,vf->current_serialno);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   634
	  vf->ready_state=STREAMSET;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   635
	  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   636
	}else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   637
	  /* we're streaming */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   638
	  /* fetch the three header packets, build the info struct */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   639
	  
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   640
	  int ret=_fetch_headers(vf,vf->vi,vf->vc,&vf->current_serialno,&og);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   641
	  if(ret) goto cleanup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   642
	  vf->current_link++;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   643
	  link=0;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   644
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   645
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   646
      
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   647
      _make_decode_ready(vf);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   648
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   649
    ogg_stream_pagein(vf->os,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   650
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   651
 cleanup:
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   652
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   653
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   654
  return ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   655
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   656
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   657
/* if, eg, 64 bit stdio is configured by default, this will build with
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   658
   fseek64 */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   659
static int _fseek64_wrap(FILE *f,ogg_int64_t off,int whence){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   660
  if(f==NULL)return(-1);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   661
  return fseek(f,off,whence);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   662
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   663
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   664
static int _ov_open1(void *f,OggVorbis_File *vf,char *initial,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   665
		     long ibytes, ov_callbacks callbacks){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   666
  int offsettest=(f?callbacks.seek_func(f,0,SEEK_CUR):-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   667
  int ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   668
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   669
  memset(vf,0,sizeof(*vf));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   670
  vf->datasource=f;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   671
  vf->callbacks = callbacks;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   672
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   673
  /* init the framing state */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   674
  vf->oy=ogg_sync_create();
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   675
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   676
  /* perhaps some data was previously read into a buffer for testing
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   677
     against other stream types.  Allow initialization from this
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   678
     previously read data (as we may be reading from a non-seekable
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   679
     stream) */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   680
  if(initial){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   681
    unsigned char *buffer=ogg_sync_bufferin(vf->oy,ibytes);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   682
    memcpy(buffer,initial,ibytes);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   683
    ogg_sync_wrote(vf->oy,ibytes);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   684
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   685
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   686
  /* can we seek? Stevens suggests the seek test was portable */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   687
  if(offsettest!=-1)vf->seekable=1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   688
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   689
  /* No seeking yet; Set up a 'single' (current) logical bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   690
     entry for partial open */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   691
  vf->links=1;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   692
  vf->vi=_ogg_calloc(vf->links,sizeof(*vf->vi));
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   693
  vf->vc=_ogg_calloc(vf->links,sizeof(*vf->vc));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   694
  vf->os=ogg_stream_create(-1); /* fill in the serialno later */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   695
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   696
  /* Try to fetch the headers, maintaining all the storage */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   697
  if((ret=_fetch_headers(vf,vf->vi,vf->vc,&vf->current_serialno,NULL))<0){
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   698
    vf->datasource=NULL;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   699
    ov_clear(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   700
  }else if(vf->ready_state < PARTOPEN)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   701
    vf->ready_state=PARTOPEN;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   702
  return(ret);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   703
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   704
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   705
static int _ov_open2(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   706
  if(vf->ready_state < OPENED)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   707
    vf->ready_state=OPENED;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   708
  if(vf->seekable){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   709
    int ret=_open_seekable2(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   710
    if(ret){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   711
      vf->datasource=NULL;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   712
      ov_clear(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   713
    }
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   714
    return(ret);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   715
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   716
  return 0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   717
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   718
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   719
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   720
/* clear out the OggVorbis_File struct */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   721
int ov_clear(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   722
  if(vf){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   723
    vorbis_block_clear(&vf->vb);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   724
    vorbis_dsp_clear(&vf->vd);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   725
    ogg_stream_destroy(vf->os);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   726
    
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   727
    if(vf->vi && vf->links){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   728
      int i;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   729
      for(i=0;i<vf->links;i++){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   730
	vorbis_info_clear(vf->vi+i);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   731
	vorbis_comment_clear(vf->vc+i);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   732
      }
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   733
      _ogg_free(vf->vi);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   734
      _ogg_free(vf->vc);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   735
    }
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   736
    if(vf->dataoffsets)_ogg_free(vf->dataoffsets);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   737
    if(vf->pcmlengths)_ogg_free(vf->pcmlengths);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   738
    if(vf->serialnos)_ogg_free(vf->serialnos);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   739
    if(vf->offsets)_ogg_free(vf->offsets);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   740
    ogg_sync_destroy(vf->oy);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   741
7941
1e8b7fc8f90d this version of tremor requires a nil check on close_func
koda
parents: 7859
diff changeset
   742
    if(vf->datasource && vf->callbacks.close_func)
1e8b7fc8f90d this version of tremor requires a nil check on close_func
koda
parents: 7859
diff changeset
   743
        (vf->callbacks.close_func)(vf->datasource);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   744
    memset(vf,0,sizeof(*vf));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   745
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   746
#ifdef DEBUG_LEAKS
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   747
  _VDBG_dump();
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   748
#endif
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   749
  return(0);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   750
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   751
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   752
/* inspects the OggVorbis file and finds/documents all the logical
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   753
   bitstreams contained in it.  Tries to be tolerant of logical
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   754
   bitstream sections that are truncated/woogie. 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   755
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   756
   return: -1) error
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   757
            0) OK
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   758
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   759
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   760
int ov_open_callbacks(void *f,OggVorbis_File *vf,char *initial,long ibytes,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   761
    ov_callbacks callbacks){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   762
  int ret=_ov_open1(f,vf,initial,ibytes,callbacks);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   763
  if(ret)return ret;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   764
  return _ov_open2(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   765
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   766
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   767
int ov_open(FILE *f,OggVorbis_File *vf,char *initial,long ibytes){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   768
  ov_callbacks callbacks = {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   769
    (size_t (*)(void *, size_t, size_t, void *))  fread,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   770
    (int (*)(void *, ogg_int64_t, int))              _fseek64_wrap,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   771
    (int (*)(void *))                             fclose,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   772
    (long (*)(void *))                            ftell
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   773
  };
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   774
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   775
  return ov_open_callbacks((void *)f, vf, initial, ibytes, callbacks);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   776
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   777
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   778
/* Only partially open the vorbis file; test for Vorbisness, and load
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   779
   the headers for the first chain.  Do not seek (although test for
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   780
   seekability).  Use ov_test_open to finish opening the file, else
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   781
   ov_clear to close/free it. Same return codes as open. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   782
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   783
int ov_test_callbacks(void *f,OggVorbis_File *vf,char *initial,long ibytes,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   784
    ov_callbacks callbacks)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   785
{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   786
  return _ov_open1(f,vf,initial,ibytes,callbacks);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   787
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   788
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   789
int ov_test(FILE *f,OggVorbis_File *vf,char *initial,long ibytes){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   790
  ov_callbacks callbacks = {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   791
    (size_t (*)(void *, size_t, size_t, void *))  fread,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   792
    (int (*)(void *, ogg_int64_t, int))              _fseek64_wrap,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   793
    (int (*)(void *))                             fclose,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   794
    (long (*)(void *))                            ftell
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   795
  };
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   796
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   797
  return ov_test_callbacks((void *)f, vf, initial, ibytes, callbacks);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   798
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   799
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   800
int ov_test_open(OggVorbis_File *vf){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   801
  if(vf->ready_state!=PARTOPEN)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   802
  return _ov_open2(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   803
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   804
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   805
/* How many logical bitstreams in this physical bitstream? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   806
long ov_streams(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   807
  return vf->links;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   808
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   809
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   810
/* Is the FILE * associated with vf seekable? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   811
long ov_seekable(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   812
  return vf->seekable;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   813
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   814
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   815
/* returns the bitrate for a given logical bitstream or the entire
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   816
   physical bitstream.  If the file is open for random access, it will
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   817
   find the *actual* average bitrate.  If the file is streaming, it
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   818
   returns the nominal bitrate (if set) else the average of the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   819
   upper/lower bounds (if set) else -1 (unset).
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   820
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   821
   If you want the actual bitrate field settings, get them from the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   822
   vorbis_info structs */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   823
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   824
long ov_bitrate(OggVorbis_File *vf,int i){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   825
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   826
  if(i>=vf->links)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   827
  if(!vf->seekable && i!=0)return(ov_bitrate(vf,0));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   828
  if(i<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   829
    ogg_int64_t bits=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   830
    int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   831
    for(i=0;i<vf->links;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   832
      bits+=(vf->offsets[i+1]-vf->dataoffsets[i])*8;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   833
    /* This once read: return(rint(bits/ov_time_total(vf,-1)));
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   834
     * gcc 3.x on x86 miscompiled this at optimisation level 2 and above,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   835
     * so this is slightly transformed to make it work.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   836
     */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   837
    return(bits*1000/ov_time_total(vf,-1));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   838
  }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   839
    if(vf->seekable){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   840
      /* return the actual bitrate */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   841
      return((vf->offsets[i+1]-vf->dataoffsets[i])*8000/ov_time_total(vf,i));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   842
    }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   843
      /* return nominal if set */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   844
      if(vf->vi[i].bitrate_nominal>0){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   845
	return vf->vi[i].bitrate_nominal;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   846
      }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   847
	if(vf->vi[i].bitrate_upper>0){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   848
	  if(vf->vi[i].bitrate_lower>0){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   849
	    return (vf->vi[i].bitrate_upper+vf->vi[i].bitrate_lower)/2;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   850
	  }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   851
	    return vf->vi[i].bitrate_upper;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   852
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   853
	}
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   854
	return(OV_FALSE);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   855
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   856
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   857
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   858
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   859
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   860
/* returns the actual bitrate since last call.  returns -1 if no
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   861
   additional data to offer since last call (or at beginning of stream),
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   862
   EINVAL if stream is only partially open 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   863
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   864
long ov_bitrate_instant(OggVorbis_File *vf){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   865
  int link=(vf->seekable?vf->current_link:0);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   866
  long ret;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   867
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   868
  if(vf->samptrack==0)return(OV_FALSE);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   869
  ret=vf->bittrack/vf->samptrack*vf->vi[link].rate;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   870
  vf->bittrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   871
  vf->samptrack=0;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   872
  return(ret);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   873
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   874
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   875
/* Guess */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   876
long ov_serialnumber(OggVorbis_File *vf,int i){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   877
  if(i>=vf->links)return(ov_serialnumber(vf,vf->links-1));
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   878
  if(!vf->seekable && i>=0)return(ov_serialnumber(vf,-1));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   879
  if(i<0){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   880
    return(vf->current_serialno);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   881
  }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   882
    return(vf->serialnos[i]);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   883
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   884
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   885
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   886
/* returns: total raw (compressed) length of content if i==-1
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   887
            raw (compressed) length of that logical bitstream for i==0 to n
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   888
	    OV_EINVAL if the stream is not seekable (we can't know the length)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   889
	    or if stream is only partially open
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   890
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   891
ogg_int64_t ov_raw_total(OggVorbis_File *vf,int i){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   892
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   893
  if(!vf->seekable || i>=vf->links)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   894
  if(i<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   895
    ogg_int64_t acc=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   896
    int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   897
    for(i=0;i<vf->links;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   898
      acc+=ov_raw_total(vf,i);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   899
    return(acc);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   900
  }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   901
    return(vf->offsets[i+1]-vf->offsets[i]);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   902
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   903
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   904
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   905
/* returns: total PCM length (samples) of content if i==-1 PCM length
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   906
	    (samples) of that logical bitstream for i==0 to n
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   907
	    OV_EINVAL if the stream is not seekable (we can't know the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   908
	    length) or only partially open 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   909
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   910
ogg_int64_t ov_pcm_total(OggVorbis_File *vf,int i){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   911
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   912
  if(!vf->seekable || i>=vf->links)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   913
  if(i<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   914
    ogg_int64_t acc=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   915
    int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   916
    for(i=0;i<vf->links;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   917
      acc+=ov_pcm_total(vf,i);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   918
    return(acc);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   919
  }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   920
    return(vf->pcmlengths[i*2+1]);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   921
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   922
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   923
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   924
/* returns: total milliseconds of content if i==-1
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   925
            milliseconds in that logical bitstream for i==0 to n
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   926
	    OV_EINVAL if the stream is not seekable (we can't know the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   927
	    length) or only partially open 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   928
*/
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   929
ogg_int64_t ov_time_total(OggVorbis_File *vf,int i){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   930
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   931
  if(!vf->seekable || i>=vf->links)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   932
  if(i<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   933
    ogg_int64_t acc=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   934
    int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   935
    for(i=0;i<vf->links;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   936
      acc+=ov_time_total(vf,i);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   937
    return(acc);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   938
  }else{
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   939
    return(((ogg_int64_t)vf->pcmlengths[i*2+1])*1000/vf->vi[i].rate);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   940
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   941
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   942
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   943
/* seek to an offset relative to the *compressed* data. This also
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   944
   scans packets to update the PCM cursor. It will cross a logical
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   945
   bitstream boundary, but only if it can't get any packets out of the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   946
   tail of the bitstream we seek to (so no surprises).
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   947
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   948
   returns zero on success, nonzero on failure */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   949
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   950
int ov_raw_seek(OggVorbis_File *vf,ogg_int64_t pos){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   951
  ogg_stream_state *work_os=NULL;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   952
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   953
  ogg_packet op={0,0,0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   954
  
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   955
  if(vf->ready_state<OPENED)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   956
  if(!vf->seekable)
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   957
    return(OV_ENOSEEK); /* don't dump machine if we can't seek */
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   958
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   959
  if(pos<0 || pos>vf->end)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   960
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   961
  /* don't yet clear out decoding machine (if it's initialized), in
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   962
     the case we're in the same link.  Restart the decode lapping, and
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   963
     let _fetch_and_process_packet deal with a potential bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   964
     boundary */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   965
  vf->pcm_offset=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   966
  ogg_stream_reset_serialno(vf->os,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   967
			    vf->current_serialno); /* must set serialno */
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   968
  vorbis_synthesis_restart(&vf->vd);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   969
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   970
  _seek_helper(vf,pos);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   971
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   972
  /* we need to make sure the pcm_offset is set, but we don't want to
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   973
     advance the raw cursor past good packets just to get to the first
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   974
     with a granulepos.  That's not equivalent behavior to beginning
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   975
     decoding as immediately after the seek position as possible.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   976
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   977
     So, a hack.  We use two stream states; a local scratch state and
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   978
     the shared vf->os stream state.  We use the local state to
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   979
     scan, and the shared state as a buffer for later decode. 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   980
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   981
     Unfortuantely, on the last page we still advance to last packet
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   982
     because the granulepos on the last page is not necessarily on a
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   983
     packet boundary, and we need to make sure the granpos is
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   984
     correct. 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   985
  */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   986
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   987
  {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   988
    int lastblock=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   989
    int accblock=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   990
    int thisblock;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
   991
    int eosflag=0;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   992
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   993
    work_os=ogg_stream_create(vf->current_serialno); /* get the memory ready */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   994
    while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   995
      if(vf->ready_state>=STREAMSET){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   996
	/* snarf/scan a packet if we can */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   997
	int result=ogg_stream_packetout(work_os,&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   998
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
   999
	if(result>0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1000
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1001
	  if(vf->vi[vf->current_link].codec_setup){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1002
	    thisblock=vorbis_packet_blocksize(vf->vi+vf->current_link,&op);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1003
	    if(thisblock<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1004
	      ogg_stream_packetout(vf->os,NULL);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1005
	      thisblock=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1006
	    }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1007
	      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1008
	      if(eosflag)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1009
		ogg_stream_packetout(vf->os,NULL);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1010
	      else
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1011
		if(lastblock)accblock+=(lastblock+thisblock)>>2;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1012
	    }	    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1013
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1014
	    if(op.granulepos!=-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1015
	      int i,link=vf->current_link;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1016
	      ogg_int64_t granulepos=op.granulepos-vf->pcmlengths[link*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1017
	      if(granulepos<0)granulepos=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1018
	      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1019
	      for(i=0;i<link;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1020
		granulepos+=vf->pcmlengths[i*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1021
	      vf->pcm_offset=granulepos-accblock;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1022
	      break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1023
	    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1024
	    lastblock=thisblock;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1025
	    continue;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1026
	  }else
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1027
	    ogg_stream_packetout(vf->os,NULL);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1028
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1029
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1030
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1031
      if(!lastblock){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1032
	if(_get_next_page(vf,&og,-1)<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1033
	  vf->pcm_offset=ov_pcm_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1034
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1035
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1036
      }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1037
	/* huh?  Bogus stream with packets but no granulepos */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1038
	vf->pcm_offset=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1039
	break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1040
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1041
      
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1042
      /* has our decoding just traversed a bitstream boundary? */
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1043
      if(vf->ready_state>=STREAMSET)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1044
	if(vf->current_serialno!=ogg_page_serialno(&og)){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1045
	  _decode_clear(vf); /* clear out stream state */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1046
	  ogg_stream_destroy(work_os);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1047
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1048
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1049
      if(vf->ready_state<STREAMSET){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1050
	int link;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1051
	
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1052
	vf->current_serialno=ogg_page_serialno(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1053
	for(link=0;link<vf->links;link++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1054
	  if(vf->serialnos[link]==vf->current_serialno)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1055
	if(link==vf->links)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1056
	  goto seek_error; /* sign of a bogus stream.  error out,
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1057
			      leave machine uninitialized */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1058
 
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1059
	vf->current_link=link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1060
	
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1061
	ogg_stream_reset_serialno(vf->os,vf->current_serialno);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1062
	ogg_stream_reset_serialno(work_os,vf->current_serialno); 
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1063
	vf->ready_state=STREAMSET;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1064
	
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1065
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1066
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1067
      {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1068
	ogg_page dup;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1069
	ogg_page_dup(&dup,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1070
	eosflag=ogg_page_eos(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1071
	ogg_stream_pagein(vf->os,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1072
	ogg_stream_pagein(work_os,&dup);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1073
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1074
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1075
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1076
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1077
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1078
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1079
  ogg_stream_destroy(work_os);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1080
  vf->bittrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1081
  vf->samptrack=0;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1082
  return(0);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1083
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1084
 seek_error:
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1085
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1086
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1087
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1088
  /* dump the machine so we're in a known state */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1089
  vf->pcm_offset=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1090
  ogg_stream_destroy(work_os);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1091
  _decode_clear(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1092
  return OV_EBADLINK;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1093
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1094
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1095
/* Page granularity seek (faster than sample granularity because we
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1096
   don't do the last bit of decode to find a specific sample).
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1097
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1098
   Seek to the last [granule marked] page preceeding the specified pos
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1099
   location, such that decoding past the returned point will quickly
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1100
   arrive at the requested position. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1101
int ov_pcm_seek_page(OggVorbis_File *vf,ogg_int64_t pos){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1102
  int link=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1103
  ogg_int64_t result=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1104
  ogg_int64_t total=ov_pcm_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1105
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1106
  ogg_packet op={0,0,0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1107
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1108
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1109
  if(!vf->seekable)return(OV_ENOSEEK);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1110
  if(pos<0 || pos>total)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1111
 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1112
  /* which bitstream section does this pcm offset occur in? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1113
  for(link=vf->links-1;link>=0;link--){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1114
    total-=vf->pcmlengths[link*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1115
    if(pos>=total)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1116
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1117
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1118
  /* search within the logical bitstream for the page with the highest
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1119
     pcm_pos preceeding (or equal to) pos.  There is a danger here;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1120
     missing pages or incorrect frame number information in the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1121
     bitstream could make our task impossible.  Account for that (it
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1122
     would be an error condition) */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1123
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1124
  /* new search algorithm by HB (Nicholas Vinen) */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1125
  {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1126
    ogg_int64_t end=vf->offsets[link+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1127
    ogg_int64_t begin=vf->offsets[link];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1128
    ogg_int64_t begintime = vf->pcmlengths[link*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1129
    ogg_int64_t endtime = vf->pcmlengths[link*2+1]+begintime;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1130
    ogg_int64_t target=pos-total+begintime;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1131
    ogg_int64_t best=begin;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1132
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1133
    while(begin<end){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1134
      ogg_int64_t bisect;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1135
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1136
      if(end-begin<CHUNKSIZE){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1137
	bisect=begin;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1138
      }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1139
	/* take a (pretty decent) guess. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1140
	bisect=begin + 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1141
	  (target-begintime)*(end-begin)/(endtime-begintime) - CHUNKSIZE;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1142
	if(bisect<=begin)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1143
	  bisect=begin+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1144
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1145
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1146
      _seek_helper(vf,bisect);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1147
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1148
      while(begin<end){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1149
	result=_get_next_page(vf,&og,end-vf->offset);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1150
	if(result==OV_EREAD) goto seek_error;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1151
	if(result<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1152
	  if(bisect<=begin+1)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1153
	    end=begin; /* found it */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1154
	  else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1155
	    if(bisect==0) goto seek_error;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1156
	    bisect-=CHUNKSIZE;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1157
	    if(bisect<=begin)bisect=begin+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1158
	    _seek_helper(vf,bisect);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1159
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1160
	}else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1161
	  ogg_int64_t granulepos=ogg_page_granulepos(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1162
	  if(granulepos==-1)continue;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1163
	  if(granulepos<target){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1164
	    best=result;  /* raw offset of packet with granulepos */ 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1165
	    begin=vf->offset; /* raw offset of next page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1166
	    begintime=granulepos;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1167
	    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1168
	    if(target-begintime>44100)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1169
	    bisect=begin; /* *not* begin + 1 */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1170
	  }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1171
	    if(bisect<=begin+1)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1172
	      end=begin;  /* found it */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1173
	    else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1174
	      if(end==vf->offset){ /* we're pretty close - we'd be stuck in */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1175
		end=result;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1176
		bisect-=CHUNKSIZE; /* an endless loop otherwise. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1177
		if(bisect<=begin)bisect=begin+1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1178
		_seek_helper(vf,bisect);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1179
	      }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1180
		end=result;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1181
		endtime=granulepos;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1182
		break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1183
	      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1184
	    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1185
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1186
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1187
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1188
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1189
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1190
    /* found our page. seek to it, update pcm offset. Easier case than
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1191
       raw_seek, don't keep packets preceeding granulepos. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1192
    {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1193
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1194
      /* seek */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1195
      _seek_helper(vf,best);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1196
      vf->pcm_offset=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1197
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1198
      if(_get_next_page(vf,&og,-1)<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1199
	ogg_page_release(&og);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1200
	return(OV_EOF); /* shouldn't happen */
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1201
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1202
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1203
      if(link!=vf->current_link){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1204
	/* Different link; dump entire decode machine */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1205
	_decode_clear(vf);  
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1206
	
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1207
	vf->current_link=link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1208
	vf->current_serialno=ogg_page_serialno(&og);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1209
	vf->ready_state=STREAMSET;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1210
	
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1211
      }else{
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1212
	vorbis_synthesis_restart(&vf->vd);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1213
      }
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1214
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1215
      ogg_stream_reset_serialno(vf->os,vf->current_serialno);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1216
      ogg_stream_pagein(vf->os,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1217
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1218
      /* pull out all but last packet; the one with granulepos */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1219
      while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1220
	result=ogg_stream_packetpeek(vf->os,&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1221
	if(result==0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1222
	  /* !!! the packet finishing this page originated on a
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1223
             preceeding page. Keep fetching previous pages until we
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1224
             get one with a granulepos or without the 'continued' flag
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1225
             set.  Then just use raw_seek for simplicity. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1226
	  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1227
	  _seek_helper(vf,best);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1228
	  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1229
	  while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1230
	    result=_get_prev_page(vf,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1231
	    if(result<0) goto seek_error;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1232
	    if(ogg_page_granulepos(&og)>-1 ||
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1233
	       !ogg_page_continued(&og)){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1234
	      return ov_raw_seek(vf,result);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1235
	    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1236
	    vf->offset=result;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1237
	  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1238
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1239
	if(result<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1240
	  result = OV_EBADPACKET; 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1241
	  goto seek_error;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1242
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1243
	if(op.granulepos!=-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1244
	  vf->pcm_offset=op.granulepos-vf->pcmlengths[vf->current_link*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1245
	  if(vf->pcm_offset<0)vf->pcm_offset=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1246
	  vf->pcm_offset+=total;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1247
	  break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1248
	}else
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1249
	  result=ogg_stream_packetout(vf->os,NULL);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1250
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1251
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1252
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1253
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1254
  /* verify result */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1255
  if(vf->pcm_offset>pos || pos>ov_pcm_total(vf,-1)){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1256
    result=OV_EFAULT;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1257
    goto seek_error;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1258
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1259
  vf->bittrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1260
  vf->samptrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1261
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1262
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1263
  ogg_packet_release(&op);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1264
  return(0);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1265
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1266
 seek_error:
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1267
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1268
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1269
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1270
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1271
  /* dump machine so we're in a known state */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1272
  vf->pcm_offset=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1273
  _decode_clear(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1274
  return (int)result;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1275
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1276
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1277
/* seek to a sample offset relative to the decompressed pcm stream 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1278
   returns zero on success, nonzero on failure */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1279
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1280
int ov_pcm_seek(OggVorbis_File *vf,ogg_int64_t pos){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1281
  ogg_packet op={0,0,0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1282
  ogg_page og={0,0,0,0};
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1283
  int thisblock,lastblock=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1284
  int ret=ov_pcm_seek_page(vf,pos);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1285
  if(ret<0)return(ret);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1286
  _make_decode_ready(vf);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1287
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1288
  /* discard leading packets we don't need for the lapping of the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1289
     position we want; don't decode them */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1290
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1291
  while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1292
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1293
    int ret=ogg_stream_packetpeek(vf->os,&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1294
    if(ret>0){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1295
      thisblock=vorbis_packet_blocksize(vf->vi+vf->current_link,&op);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1296
      if(thisblock<0){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1297
	ogg_stream_packetout(vf->os,NULL);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1298
	continue; /* non audio packet */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1299
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1300
      if(lastblock)vf->pcm_offset+=(lastblock+thisblock)>>2;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1301
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1302
      if(vf->pcm_offset+((thisblock+
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1303
			  vorbis_info_blocksize(vf->vi,1))>>2)>=pos)break;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1304
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1305
      /* remove the packet from packet queue and track its granulepos */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1306
      ogg_stream_packetout(vf->os,NULL);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1307
      vorbis_synthesis(&vf->vb,&op,0);  /* set up a vb with
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1308
					   only tracking, no
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1309
					   pcm_decode */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1310
      vorbis_synthesis_blockin(&vf->vd,&vf->vb); 
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1311
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1312
      /* end of logical stream case is hard, especially with exact
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1313
	 length positioning. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1314
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1315
      if(op.granulepos>-1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1316
	int i;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1317
	/* always believe the stream markers */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1318
	vf->pcm_offset=op.granulepos-vf->pcmlengths[vf->current_link*2];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1319
	if(vf->pcm_offset<0)vf->pcm_offset=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1320
	for(i=0;i<vf->current_link;i++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1321
	  vf->pcm_offset+=vf->pcmlengths[i*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1322
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1323
	
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1324
      lastblock=thisblock;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1325
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1326
    }else{
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1327
      if(ret<0 && ret!=OV_HOLE)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1328
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1329
      /* suck in a new page */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1330
      if(_get_next_page(vf,&og,-1)<0)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1331
      if(vf->current_serialno!=ogg_page_serialno(&og))_decode_clear(vf);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1332
      
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1333
      if(vf->ready_state<STREAMSET){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1334
	int link;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1335
	
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1336
	vf->current_serialno=ogg_page_serialno(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1337
	for(link=0;link<vf->links;link++)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1338
	  if(vf->serialnos[link]==vf->current_serialno)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1339
	if(link==vf->links){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1340
	  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1341
	  ogg_packet_release(&op);
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1342
	  return(OV_EBADLINK);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1343
	}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1344
	vf->current_link=link;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1345
	
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1346
	ogg_stream_reset_serialno(vf->os,vf->current_serialno); 
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1347
	vf->ready_state=STREAMSET;      
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1348
	_make_decode_ready(vf);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1349
	lastblock=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1350
      }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1351
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1352
      ogg_stream_pagein(vf->os,&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1353
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1354
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1355
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1356
  vf->bittrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1357
  vf->samptrack=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1358
  /* discard samples until we reach the desired position. Crossing a
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1359
     logical bitstream boundary with abandon is OK. */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1360
  while(vf->pcm_offset<pos){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1361
    ogg_int64_t target=pos-vf->pcm_offset;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1362
    long samples=vorbis_synthesis_pcmout(&vf->vd,NULL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1363
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1364
    if(samples>target)samples=target;
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1365
    vorbis_synthesis_read(&vf->vd,samples);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1366
    vf->pcm_offset+=samples;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1367
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1368
    if(samples<target)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1369
      if(_fetch_and_process_packet(vf,1,1)<=0)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1370
	vf->pcm_offset=ov_pcm_total(vf,-1); /* eof */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1371
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1372
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1373
  ogg_page_release(&og);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1374
  ogg_packet_release(&op);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1375
  return 0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1376
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1377
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1378
/* seek to a playback time relative to the decompressed pcm stream 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1379
   returns zero on success, nonzero on failure */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1380
int ov_time_seek(OggVorbis_File *vf,ogg_int64_t milliseconds){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1381
  /* translate time to PCM position and call ov_pcm_seek */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1382
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1383
  int link=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1384
  ogg_int64_t pcm_total=ov_pcm_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1385
  ogg_int64_t time_total=ov_time_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1386
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1387
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1388
  if(!vf->seekable)return(OV_ENOSEEK);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1389
  if(milliseconds<0 || milliseconds>time_total)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1390
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1391
  /* which bitstream section does this time offset occur in? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1392
  for(link=vf->links-1;link>=0;link--){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1393
    pcm_total-=vf->pcmlengths[link*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1394
    time_total-=ov_time_total(vf,link);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1395
    if(milliseconds>=time_total)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1396
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1397
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1398
  /* enough information to convert time offset to pcm offset */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1399
  {
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1400
    ogg_int64_t target=pcm_total+(milliseconds-time_total)*vf->vi[link].rate/1000;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1401
    return(ov_pcm_seek(vf,target));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1402
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1403
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1404
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1405
/* page-granularity version of ov_time_seek 
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1406
   returns zero on success, nonzero on failure */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1407
int ov_time_seek_page(OggVorbis_File *vf,ogg_int64_t milliseconds){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1408
  /* translate time to PCM position and call ov_pcm_seek */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1409
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1410
  int link=-1;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1411
  ogg_int64_t pcm_total=ov_pcm_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1412
  ogg_int64_t time_total=ov_time_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1413
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1414
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1415
  if(!vf->seekable)return(OV_ENOSEEK);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1416
  if(milliseconds<0 || milliseconds>time_total)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1417
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1418
  /* which bitstream section does this time offset occur in? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1419
  for(link=vf->links-1;link>=0;link--){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1420
    pcm_total-=vf->pcmlengths[link*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1421
    time_total-=ov_time_total(vf,link);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1422
    if(milliseconds>=time_total)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1423
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1424
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1425
  /* enough information to convert time offset to pcm offset */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1426
  {
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1427
    ogg_int64_t target=pcm_total+(milliseconds-time_total)*vf->vi[link].rate/1000;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1428
    return(ov_pcm_seek_page(vf,target));
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1429
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1430
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1431
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1432
/* tell the current stream offset cursor.  Note that seek followed by
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1433
   tell will likely not give the set offset due to caching */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1434
ogg_int64_t ov_raw_tell(OggVorbis_File *vf){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1435
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1436
  return(vf->offset);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1437
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1438
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1439
/* return PCM offset (sample) of next PCM sample to be read */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1440
ogg_int64_t ov_pcm_tell(OggVorbis_File *vf){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1441
  if(vf->ready_state<OPENED)return(OV_EINVAL);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1442
  return(vf->pcm_offset);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1443
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1444
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1445
/* return time offset (milliseconds) of next PCM sample to be read */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1446
ogg_int64_t ov_time_tell(OggVorbis_File *vf){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1447
  int link=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1448
  ogg_int64_t pcm_total=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1449
  ogg_int64_t time_total=0;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1450
  
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1451
  if(vf->ready_state<OPENED)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1452
  if(vf->seekable){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1453
    pcm_total=ov_pcm_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1454
    time_total=ov_time_total(vf,-1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1455
  
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1456
    /* which bitstream section does this time offset occur in? */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1457
    for(link=vf->links-1;link>=0;link--){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1458
      pcm_total-=vf->pcmlengths[link*2+1];
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1459
      time_total-=ov_time_total(vf,link);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1460
      if(vf->pcm_offset>=pcm_total)break;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1461
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1462
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1463
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1464
  return(time_total+(1000*vf->pcm_offset-pcm_total)/vf->vi[link].rate);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1465
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1466
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1467
/*  link:   -1) return the vorbis_info struct for the bitstream section
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1468
                currently being decoded
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1469
           0-n) to request information for a specific bitstream section
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1470
    
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1471
    In the case of a non-seekable bitstream, any call returns the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1472
    current bitstream.  NULL in the case that the machine is not
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1473
    initialized */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1474
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1475
vorbis_info *ov_info(OggVorbis_File *vf,int link){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1476
  if(vf->seekable){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1477
    if(link<0)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1478
      if(vf->ready_state>=STREAMSET)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1479
	return vf->vi+vf->current_link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1480
      else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1481
      return vf->vi;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1482
    else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1483
      if(link>=vf->links)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1484
	return NULL;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1485
      else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1486
	return vf->vi+link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1487
  }else{
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1488
    return vf->vi;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1489
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1490
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1491
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1492
/* grr, strong typing, grr, no templates/inheritence, grr */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1493
vorbis_comment *ov_comment(OggVorbis_File *vf,int link){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1494
  if(vf->seekable){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1495
    if(link<0)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1496
      if(vf->ready_state>=STREAMSET)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1497
	return vf->vc+vf->current_link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1498
      else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1499
	return vf->vc;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1500
    else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1501
      if(link>=vf->links)
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1502
	return NULL;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1503
      else
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1504
	return vf->vc+link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1505
  }else{
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1506
    return vf->vc;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1507
  }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1508
}
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1509
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1510
/* up to this point, everything could more or less hide the multiple
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1511
   logical bitstream nature of chaining from the toplevel application
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1512
   if the toplevel application didn't particularly care.  However, at
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1513
   the point that we actually read audio back, the multiple-section
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1514
   nature must surface: Multiple bitstream sections do not necessarily
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1515
   have to have the same number of channels or sampling rate.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1516
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1517
   ov_read returns the sequential logical bitstream number currently
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1518
   being decoded along with the PCM data in order that the toplevel
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1519
   application can take action on channel/sample rate changes.  This
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1520
   number will be incremented even for streamed (non-seekable) streams
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1521
   (for seekable streams, it represents the actual logical bitstream
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1522
   index within the physical bitstream.  Note that the accessor
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1523
   functions above are aware of this dichotomy).
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1524
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1525
   input values: buffer) a buffer to hold packed PCM data for return
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1526
		 length) the byte length requested to be placed into buffer
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1527
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1528
   return values: <0) error/hole in data (OV_HOLE), partial open (OV_EINVAL)
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1529
                   0) EOF
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1530
		   n) number of bytes of PCM actually returned.  The
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1531
		   below works on a packet-by-packet basis, so the
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1532
		   return length is not related to the 'length' passed
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1533
		   in, just guaranteed to fit.
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1534
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1535
	    *section) set to the logical bitstream number */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1536
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1537
long ov_read(OggVorbis_File *vf,char *buffer,int bytes_req,int *bitstream){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1538
  int i,j;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1539
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1540
  ogg_int32_t **pcm;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1541
  long samples;
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1542
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1543
  if(vf->ready_state<OPENED)return(OV_EINVAL);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1544
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1545
  while(1){
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1546
    if(vf->ready_state==INITSET){
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1547
      samples=vorbis_synthesis_pcmout(&vf->vd,&pcm);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1548
      if(samples)break;
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1549
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1550
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1551
    /* suck in another packet */
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1552
    {
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1553
      int ret=_fetch_and_process_packet(vf,1,1);
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1554
      if(ret==OV_EOF)
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1555
	return(0);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1556
      if(ret<=0)
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1557
	return(ret);
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1558
    }
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1559
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1560
  }
7849
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1561
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1562
  if(samples>0){
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1563
  
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1564
    /* yay! proceed to pack data into the byte buffer */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1565
    
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1566
    long channels=ov_info(vf,-1)->channels;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1567
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1568
    if(samples>(bytes_req/(2*channels)))
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1569
      samples=bytes_req/(2*channels);      
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1570
    
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1571
    for(i=0;i<channels;i++) { /* It's faster in this order */
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1572
      ogg_int32_t *src=pcm[i];
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1573
      short *dest=((short *)buffer)+i;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1574
      for(j=0;j<samples;j++) {
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1575
        *dest=CLIP_TO_15(src[j]>>9);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1576
        dest+=channels;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1577
      }
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1578
    }
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1579
    
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1580
    vorbis_synthesis_read(&vf->vd,samples);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1581
    vf->pcm_offset+=samples;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1582
    if(bitstream)*bitstream=vf->current_link;
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1583
    return(samples*2*channels);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1584
  }else{
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1585
    return(samples);
a12155461b34 revert r767d3c4153a1 this tremor implementation is buggy
koda
parents: 7697
diff changeset
  1586
  }
5170
f7e49eff3708 add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff changeset
  1587
}