author | koda |
Sat, 18 Feb 2012 11:59:59 +0100 | |
changeset 6708 | 314929f0a3e1 |
parent 6045 | 9a7cc0f29430 |
permissions | -rw-r--r-- |
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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 1994-2002 * |
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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: PCM data vector blocking, windowing and dis/reassembly |
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********************************************************************/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "ogg.h" |
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#include "ivorbiscodec.h" |
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#include "codec_internal.h" |
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#include "window.h" |
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#include "registry.h" |
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#include "misc.h" |
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static int ilog(unsigned int v){ |
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int ret=0; |
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if(v)--v; |
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while(v){ |
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ret++; |
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v>>=1; |
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} |
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return(ret); |
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} |
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/* pcm accumulator examples (not exhaustive): |
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<-------------- lW ----------------> |
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<--------------- W ----------------> |
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: .....|..... _______________ | |
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: .''' | '''_--- | |\ | |
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:.....''' |_____--- '''......| | \_______| |
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:.................|__________________|_______|__|______| |
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|<------ Sl ------>| > Sr < |endW |
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|beginSl |endSl | |endSr |
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|beginW |endlW |beginSr |
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|< lW >| |
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<--------------- W ----------------> |
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| | .. ______________ | |
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| | ' `/ | ---_ | |
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|___.'___/`. | ---_____| |
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|_______|__|_______|_________________| |
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| >|Sl|< |<------ Sr ----->|endW |
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| | |endSl |beginSr |endSr |
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|beginW | |endlW |
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mult[0] |beginSl mult[n] |
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|
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<-------------- lW -----------------> |
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|<--W-->| |
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: .............. ___ | | |
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: .''' |`/ \ | | |
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:.....''' |/`....\|...| |
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:.........................|___|___|___| |
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|Sl |Sr |endW |
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| | |endSr |
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| |beginSr |
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| |endSl |
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|beginSl |
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|beginW |
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*/ |
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/* block abstraction setup *********************************************/ |
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#ifndef WORD_ALIGN |
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#define WORD_ALIGN 8 |
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#endif |
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int vorbis_block_init(vorbis_dsp_state *v, vorbis_block *vb){ |
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memset(vb,0,sizeof(*vb)); |
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vb->vd=v; |
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vb->localalloc=0; |
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vb->localstore=NULL; |
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return(0); |
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} |
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void *_vorbis_block_alloc(vorbis_block *vb,long bytes){ |
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bytes=(bytes+(WORD_ALIGN-1)) & ~(WORD_ALIGN-1); |
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if(bytes+vb->localtop>vb->localalloc){ |
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/* can't just _ogg_realloc... there are outstanding pointers */ |
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if(vb->localstore){ |
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struct alloc_chain *link=(struct alloc_chain *)_ogg_malloc(sizeof(*link)); |
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vb->totaluse+=vb->localtop; |
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link->next=vb->reap; |
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link->ptr=vb->localstore; |
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vb->reap=link; |
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} |
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/* highly conservative */ |
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vb->localalloc=bytes; |
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vb->localstore=_ogg_malloc(vb->localalloc); |
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vb->localtop=0; |
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} |
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{ |
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void *ret=(void *)(((char *)vb->localstore)+vb->localtop); |
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vb->localtop+=bytes; |
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return ret; |
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} |
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} |
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/* reap the chain, pull the ripcord */ |
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void _vorbis_block_ripcord(vorbis_block *vb){ |
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/* reap the chain */ |
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struct alloc_chain *reap=vb->reap; |
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while(reap){ |
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struct alloc_chain *next=reap->next; |
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_ogg_free(reap->ptr); |
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memset(reap,0,sizeof(*reap)); |
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_ogg_free(reap); |
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reap=next; |
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125 |
} |
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/* consolidate storage */ |
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if(vb->totaluse){ |
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vb->localstore=_ogg_realloc(vb->localstore,vb->totaluse+vb->localalloc); |
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vb->localalloc+=vb->totaluse; |
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vb->totaluse=0; |
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131 |
} |
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132 |
|
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/* pull the ripcord */ |
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vb->localtop=0; |
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vb->reap=NULL; |
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136 |
} |
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137 |
|
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138 |
int vorbis_block_clear(vorbis_block *vb){ |
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_vorbis_block_ripcord(vb); |
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if(vb->localstore)_ogg_free(vb->localstore); |
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141 |
|
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memset(vb,0,sizeof(*vb)); |
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143 |
return(0); |
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144 |
} |
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145 |
|
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static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){ |
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int i; |
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codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
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149 |
private_state *b=NULL; |
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150 |
|
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memset(v,0,sizeof(*v)); |
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b=(private_state *)(v->backend_state=_ogg_calloc(1,sizeof(*b))); |
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153 |
|
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v->vi=vi; |
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b->modebits=ilog(ci->modes); |
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156 |
|
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157 |
/* Vorbis I uses only window type 0 */ |
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b->window[0]=_vorbis_window(0,ci->blocksizes[0]/2); |
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b->window[1]=_vorbis_window(0,ci->blocksizes[1]/2); |
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160 |
|
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161 |
/* finish the codebooks */ |
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162 |
if(!ci->fullbooks){ |
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ci->fullbooks=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->fullbooks)); |
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164 |
for(i=0;i<ci->books;i++){ |
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vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]); |
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166 |
/* decode codebooks are now standalone after init */ |
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167 |
vorbis_staticbook_destroy(ci->book_param[i]); |
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168 |
ci->book_param[i]=NULL; |
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169 |
} |
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170 |
} |
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171 |
|
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172 |
v->pcm_storage=ci->blocksizes[1]; |
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v->pcm=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcm)); |
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174 |
v->pcmret=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcmret)); |
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175 |
for(i=0;i<vi->channels;i++) |
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v->pcm[i]=(ogg_int32_t *)_ogg_calloc(v->pcm_storage,sizeof(*v->pcm[i])); |
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177 |
|
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178 |
/* all 1 (large block) or 0 (small block) */ |
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179 |
/* explicitly set for the sake of clarity */ |
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180 |
v->lW=0; /* previous window size */ |
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181 |
v->W=0; /* current window size */ |
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182 |
|
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/* initialize all the mapping/backend lookups */ |
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b->mode=(vorbis_look_mapping **)_ogg_calloc(ci->modes,sizeof(*b->mode)); |
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185 |
for(i=0;i<ci->modes;i++){ |
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186 |
int mapnum=ci->mode_param[i]->mapping; |
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int maptype=ci->map_type[mapnum]; |
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188 |
b->mode[i]=_mapping_P[maptype]->look(v,ci->mode_param[i], |
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189 |
ci->map_param[mapnum]); |
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190 |
} |
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191 |
return(0); |
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192 |
} |
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193 |
|
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int vorbis_synthesis_restart(vorbis_dsp_state *v){ |
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vorbis_info *vi=v->vi; |
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codec_setup_info *ci; |
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197 |
|
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198 |
if(!v->backend_state)return -1; |
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199 |
if(!vi)return -1; |
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ci=vi->codec_setup; |
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201 |
if(!ci)return -1; |
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202 |
|
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v->centerW=ci->blocksizes[1]/2; |
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v->pcm_current=v->centerW; |
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205 |
|
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v->pcm_returned=-1; |
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207 |
v->granulepos=-1; |
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v->sequence=-1; |
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209 |
((private_state *)(v->backend_state))->sample_count=-1; |
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210 |
|
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211 |
return(0); |
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212 |
} |
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213 |
|
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int vorbis_synthesis_init(vorbis_dsp_state *v,vorbis_info *vi){ |
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_vds_init(v,vi); |
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216 |
vorbis_synthesis_restart(v); |
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217 |
|
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218 |
return(0); |
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219 |
} |
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220 |
|
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221 |
void vorbis_dsp_clear(vorbis_dsp_state *v){ |
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222 |
int i; |
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223 |
if(v){ |
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vorbis_info *vi=v->vi; |
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225 |
codec_setup_info *ci=(codec_setup_info *)(vi?vi->codec_setup:NULL); |
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226 |
private_state *b=(private_state *)v->backend_state; |
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227 |
|
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228 |
if(v->pcm){ |
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229 |
for(i=0;i<vi->channels;i++) |
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230 |
if(v->pcm[i])_ogg_free(v->pcm[i]); |
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231 |
_ogg_free(v->pcm); |
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232 |
if(v->pcmret)_ogg_free(v->pcmret); |
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233 |
} |
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234 |
|
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235 |
/* free mode lookups; these are actually vorbis_look_mapping structs */ |
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236 |
if(ci){ |
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237 |
for(i=0;i<ci->modes;i++){ |
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238 |
int mapnum=ci->mode_param[i]->mapping; |
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239 |
int maptype=ci->map_type[mapnum]; |
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240 |
if(b && b->mode)_mapping_P[maptype]->free_look(b->mode[i]); |
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241 |
} |
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242 |
} |
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243 |
|
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244 |
if(b){ |
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if(b->mode)_ogg_free(b->mode); |
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_ogg_free(b); |
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} |
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|
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memset(v,0,sizeof(*v)); |
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} |
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} |
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|
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/* Unlike in analysis, the window is only partially applied for each |
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block. The time domain envelope is not yet handled at the point of |
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calling (as it relies on the previous block). */ |
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|
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int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){ |
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vorbis_info *vi=v->vi; |
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codec_setup_info *ci=(codec_setup_info *)vi->codec_setup; |
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private_state *b=v->backend_state; |
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int i,j; |
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|
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if(v->pcm_current>v->pcm_returned && v->pcm_returned!=-1)return(OV_EINVAL); |
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|
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v->lW=v->W; |
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v->W=vb->W; |
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v->nW=-1; |
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|
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if((v->sequence==-1)|| |
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(v->sequence+1 != vb->sequence)){ |
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v->granulepos=-1; /* out of sequence; lose count */ |
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b->sample_count=-1; |
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} |
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|
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v->sequence=vb->sequence; |
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|
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if(vb->pcm){ /* no pcm to process if vorbis_synthesis_trackonly |
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was called on block */ |
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int n=ci->blocksizes[v->W]/2; |
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int n0=ci->blocksizes[0]/2; |
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int n1=ci->blocksizes[1]/2; |
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282 |
|
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int thisCenter; |
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int prevCenter; |
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285 |
|
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if(v->centerW){ |
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thisCenter=n1; |
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prevCenter=0; |
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}else{ |
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thisCenter=0; |
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prevCenter=n1; |
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} |
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293 |
|
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/* v->pcm is now used like a two-stage double buffer. We don't want |
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295 |
to have to constantly shift *or* adjust memory usage. Don't |
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accept a new block until the old is shifted out */ |
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297 |
|
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/* overlap/add PCM */ |
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299 |
|
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for(j=0;j<vi->channels;j++){ |
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301 |
/* the overlap/add section */ |
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if(v->lW){ |
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if(v->W){ |
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/* large/large */ |
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ogg_int32_t *pcm=v->pcm[j]+prevCenter; |
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ogg_int32_t *p=vb->pcm[j]; |
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for(i=0;i<n1;i++) |
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pcm[i]+=p[i]; |
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}else{ |
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/* large/small */ |
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311 |
ogg_int32_t *pcm=v->pcm[j]+prevCenter+n1/2-n0/2; |
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ogg_int32_t *p=vb->pcm[j]; |
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313 |
for(i=0;i<n0;i++) |
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pcm[i]+=p[i]; |
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315 |
} |
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316 |
}else{ |
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if(v->W){ |
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/* small/large */ |
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ogg_int32_t *pcm=v->pcm[j]+prevCenter; |
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320 |
ogg_int32_t *p=vb->pcm[j]+n1/2-n0/2; |
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321 |
for(i=0;i<n0;i++) |
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pcm[i]+=p[i]; |
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323 |
for(;i<n1/2+n0/2;i++) |
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324 |
pcm[i]=p[i]; |
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325 |
}else{ |
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/* small/small */ |
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ogg_int32_t *pcm=v->pcm[j]+prevCenter; |
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328 |
ogg_int32_t *p=vb->pcm[j]; |
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329 |
for(i=0;i<n0;i++) |
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330 |
pcm[i]+=p[i]; |
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331 |
} |
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332 |
} |
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333 |
|
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334 |
/* the copy section */ |
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335 |
{ |
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ogg_int32_t *pcm=v->pcm[j]+thisCenter; |
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337 |
ogg_int32_t *p=vb->pcm[j]+n; |
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338 |
for(i=0;i<n;i++) |
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339 |
pcm[i]=p[i]; |
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340 |
} |
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341 |
} |
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342 |
|
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if(v->centerW) |
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v->centerW=0; |
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345 |
else |
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v->centerW=n1; |
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347 |
|
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/* deal with initial packet state; we do this using the explicit |
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pcm_returned==-1 flag otherwise we're sensitive to first block |
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being short or long */ |
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351 |
|
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352 |
if(v->pcm_returned==-1){ |
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353 |
v->pcm_returned=thisCenter; |
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354 |
v->pcm_current=thisCenter; |
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355 |
}else{ |
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356 |
v->pcm_returned=prevCenter; |
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357 |
v->pcm_current=prevCenter+ |
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358 |
ci->blocksizes[v->lW]/4+ |
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359 |
ci->blocksizes[v->W]/4; |
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360 |
} |
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361 |
|
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362 |
} |
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363 |
|
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364 |
/* track the frame number... This is for convenience, but also |
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365 |
making sure our last packet doesn't end with added padding. If |
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366 |
the last packet is partial, the number of samples we'll have to |
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367 |
return will be past the vb->granulepos. |
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368 |
|
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add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
369 |
This is not foolproof! It will be confused if we begin |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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370 |
decoding at the last page after a seek or hole. In that case, |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
371 |
we don't have a starting point to judge where the last frame |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
372 |
is. For this reason, vorbisfile will always try to make sure |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
373 |
it reads the last two marked pages in proper sequence */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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diff
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|
374 |
|
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add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
375 |
if(b->sample_count==-1){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
376 |
b->sample_count=0; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
diff
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|
377 |
}else{ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
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|
378 |
b->sample_count+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
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|
379 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
380 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
381 |
if(v->granulepos==-1){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
diff
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|
382 |
if(vb->granulepos!=-1){ /* only set if we have a position to set to */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
383 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
384 |
v->granulepos=vb->granulepos; |
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:
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|
386 |
/* is this a short page? */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
387 |
if(b->sample_count>v->granulepos){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
388 |
/* corner case; if this is both the first and last audio page, |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
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parents:
diff
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|
389 |
then spec says the end is cut, not beginning */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
390 |
if(vb->eofflag){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
391 |
/* trim the end */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
392 |
/* no preceeding granulepos; assume we started at zero (we'd |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
393 |
have to in a short single-page stream) */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
394 |
/* granulepos could be -1 due to a seek, but that would result |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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|
395 |
in a long coun`t, not short count */ |
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:
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changeset
|
397 |
v->pcm_current-=(b->sample_count-v->granulepos); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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changeset
|
398 |
}else{ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
399 |
/* trim the beginning */ |
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add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
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changeset
|
400 |
v->pcm_returned+=(b->sample_count-v->granulepos); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
401 |
if(v->pcm_returned>v->pcm_current) |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
402 |
v->pcm_returned=v->pcm_current; |
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 |
} |
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 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
408 |
}else{ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
409 |
v->granulepos+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
410 |
if(vb->granulepos!=-1 && v->granulepos!=vb->granulepos){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
411 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
412 |
if(v->granulepos>vb->granulepos){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
413 |
long extra=v->granulepos-vb->granulepos; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
414 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
415 |
if(extra) |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
416 |
if(vb->eofflag){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
417 |
/* partial last frame. Strip the extra samples off */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
418 |
v->pcm_current-=extra; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
419 |
} /* else {Shouldn't happen *unless* the bitstream is out of |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
420 |
spec. Either way, believe the bitstream } */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
421 |
} /* else {Shouldn't happen *unless* the bitstream is out of |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
422 |
spec. Either way, believe the bitstream } */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
423 |
v->granulepos=vb->granulepos; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
424 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
425 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
426 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
427 |
/* Update, cleanup */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
428 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
429 |
if(vb->eofflag)v->eofflag=1; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
430 |
return(0); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
431 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
432 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
433 |
/* pcm==NULL indicates we just want the pending samples, no more */ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
434 |
int vorbis_synthesis_pcmout(vorbis_dsp_state *v,ogg_int32_t ***pcm){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
435 |
vorbis_info *vi=v->vi; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
436 |
if(v->pcm_returned>-1 && v->pcm_returned<v->pcm_current){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
437 |
if(pcm){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
438 |
int i; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
439 |
for(i=0;i<vi->channels;i++) |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
440 |
v->pcmret[i]=v->pcm[i]+v->pcm_returned; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
441 |
*pcm=v->pcmret; |
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 |
return(v->pcm_current-v->pcm_returned); |
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 |
return(0); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
446 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
447 |
|
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
448 |
int vorbis_synthesis_read(vorbis_dsp_state *v,int bytes){ |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
449 |
if(bytes && v->pcm_returned+bytes>v->pcm_current)return(OV_EINVAL); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
450 |
v->pcm_returned+=bytes; |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
451 |
return(0); |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
452 |
} |
f7e49eff3708
add libTremor sources (integer-only libvorbis implementation) to repo and ios project
koda
parents:
diff
changeset
|
453 |