diff -r a501f5ec7b34 -r 0f5961910e27 misc/libtremor/tremor/synthesis.c --- a/misc/libtremor/tremor/synthesis.c Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,113 +0,0 @@ -/******************************************************************** - * * - * THIS FILE IS PART OF THE OggVorbis 'TREMOR' CODEC SOURCE CODE. * - * * - * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * - * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * - * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * - * * - * THE OggVorbis 'TREMOR' SOURCE CODE IS (C) COPYRIGHT 1994-2003 * - * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ * - * * - ******************************************************************** - - function: single-block PCM synthesis - last mod: $Id: synthesis.c,v 1.4 2003/03/29 03:07:21 xiphmont Exp $ - - ********************************************************************/ - -#include -#include "ogg.h" -#include "ivorbiscodec.h" -#include "codec_internal.h" -#include "registry.h" -#include "misc.h" -#include "block.h" - -int vorbis_synthesis(vorbis_block *vb,ogg_packet *op,int decodep){ - vorbis_dsp_state *vd=vb->vd; - private_state *b=(private_state *)vd->backend_state; - vorbis_info *vi=vd->vi; - codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; - oggpack_buffer *opb=&vb->opb; - int type,mode,i; - - /* first things first. Make sure decode is ready */ - _vorbis_block_ripcord(vb); - oggpack_readinit(opb,op->packet); - - /* Check the packet type */ - if(oggpack_read(opb,1)!=0){ - /* Oops. This is not an audio data packet */ - return(OV_ENOTAUDIO); - } - - /* read our mode and pre/post windowsize */ - mode=oggpack_read(opb,b->modebits); - if(mode==-1)return(OV_EBADPACKET); - - vb->mode=mode; - vb->W=ci->mode_param[mode]->blockflag; - if(vb->W){ - vb->lW=oggpack_read(opb,1); - vb->nW=oggpack_read(opb,1); - if(vb->nW==-1) return(OV_EBADPACKET); - }else{ - vb->lW=0; - vb->nW=0; - } - - /* more setup */ - vb->granulepos=op->granulepos; - vb->sequence=op->packetno-3; /* first block is third packet */ - vb->eofflag=op->e_o_s; - - if(decodep){ - /* alloc pcm passback storage */ - vb->pcmend=ci->blocksizes[vb->W]; - vb->pcm=(ogg_int32_t **)_vorbis_block_alloc(vb,sizeof(*vb->pcm)*vi->channels); - for(i=0;ichannels;i++) - vb->pcm[i]=(ogg_int32_t *)_vorbis_block_alloc(vb,vb->pcmend*sizeof(*vb->pcm[i])); - - /* unpack_header enforces range checking */ - type=ci->map_type[ci->mode_param[mode]->mapping]; - - return(_mapping_P[type]->inverse(vb,b->mode[mode])); - }else{ - /* no pcm */ - vb->pcmend=0; - vb->pcm=NULL; - - return(0); - } -} - -long vorbis_packet_blocksize(vorbis_info *vi,ogg_packet *op){ - codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; - oggpack_buffer opb; - int mode; - - oggpack_readinit(&opb,op->packet); - - /* Check the packet type */ - if(oggpack_read(&opb,1)!=0){ - /* Oops. This is not an audio data packet */ - return(OV_ENOTAUDIO); - } - - { - int modebits=0; - int v=ci->modes; - while(v>1){ - modebits++; - v>>=1; - } - - /* read our mode and pre/post windowsize */ - mode=oggpack_read(&opb,modebits); - } - if(mode==-1)return(OV_EBADPACKET); - return(ci->blocksizes[ci->mode_param[mode]->blockflag]); -} - -