diff options
Diffstat (limited to 'osframework/source/SexyAppFramework/ogg/block.c')
| -rw-r--r-- | osframework/source/SexyAppFramework/ogg/block.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/osframework/source/SexyAppFramework/ogg/block.c b/osframework/source/SexyAppFramework/ogg/block.c new file mode 100644 index 0000000..ec71a2c --- /dev/null +++ b/osframework/source/SexyAppFramework/ogg/block.c @@ -0,0 +1,453 @@ +/********************************************************************
+ * *
+ * 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 1994-2002 *
+ * BY THE Xiph.Org FOUNDATION http://www.xiph.org/ *
+ * *
+ ********************************************************************
+
+ function: PCM data vector blocking, windowing and dis/reassembly
+
+ ********************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "ogg.h"
+#include "ivorbiscodec.h"
+#include "codec_internal.h"
+
+#include "window.h"
+#include "registry.h"
+#include "misc.h"
+
+static int ilog(unsigned int v){
+ int ret=0;
+ if(v)--v;
+ while(v){
+ ret++;
+ v>>=1;
+ }
+ return(ret);
+}
+
+/* pcm accumulator examples (not exhaustive):
+
+ <-------------- lW ---------------->
+ <--------------- W ---------------->
+: .....|..... _______________ |
+: .''' | '''_--- | |\ |
+:.....''' |_____--- '''......| | \_______|
+:.................|__________________|_______|__|______|
+ |<------ Sl ------>| > Sr < |endW
+ |beginSl |endSl | |endSr
+ |beginW |endlW |beginSr
+
+
+ |< lW >|
+ <--------------- W ---------------->
+ | | .. ______________ |
+ | | ' `/ | ---_ |
+ |___.'___/`. | ---_____|
+ |_______|__|_______|_________________|
+ | >|Sl|< |<------ Sr ----->|endW
+ | | |endSl |beginSr |endSr
+ |beginW | |endlW
+ mult[0] |beginSl mult[n]
+
+ <-------------- lW ----------------->
+ |<--W-->|
+: .............. ___ | |
+: .''' |`/ \ | |
+:.....''' |/`....\|...|
+:.........................|___|___|___|
+ |Sl |Sr |endW
+ | | |endSr
+ | |beginSr
+ | |endSl
+ |beginSl
+ |beginW
+*/
+
+/* block abstraction setup *********************************************/
+
+#ifndef WORD_ALIGN
+#define WORD_ALIGN 8
+#endif
+
+int vorbis_block_init(vorbis_dsp_state *v, vorbis_block *vb){
+ memset(vb,0,sizeof(*vb));
+ vb->vd=v;
+ vb->localalloc=0;
+ vb->localstore=NULL;
+
+ return(0);
+}
+
+void *_vorbis_block_alloc(vorbis_block *vb,long bytes){
+ bytes=(bytes+(WORD_ALIGN-1)) & ~(WORD_ALIGN-1);
+ if(bytes+vb->localtop>vb->localalloc){
+ /* can't just _ogg_realloc... there are outstanding pointers */
+ if(vb->localstore){
+ struct alloc_chain *link=(struct alloc_chain *)_ogg_malloc(sizeof(*link));
+ vb->totaluse+=vb->localtop;
+ link->next=vb->reap;
+ link->ptr=vb->localstore;
+ vb->reap=link;
+ }
+ /* highly conservative */
+ vb->localalloc=bytes;
+ vb->localstore=_ogg_malloc(vb->localalloc);
+ vb->localtop=0;
+ }
+ {
+ void *ret=(void *)(((char *)vb->localstore)+vb->localtop);
+ vb->localtop+=bytes;
+ return ret;
+ }
+}
+
+/* reap the chain, pull the ripcord */
+void _vorbis_block_ripcord(vorbis_block *vb){
+ /* reap the chain */
+ struct alloc_chain *reap=vb->reap;
+ while(reap){
+ struct alloc_chain *next=reap->next;
+ _ogg_free(reap->ptr);
+ memset(reap,0,sizeof(*reap));
+ _ogg_free(reap);
+ reap=next;
+ }
+ /* consolidate storage */
+ if(vb->totaluse){
+ vb->localstore=_ogg_realloc(vb->localstore,vb->totaluse+vb->localalloc);
+ vb->localalloc+=vb->totaluse;
+ vb->totaluse=0;
+ }
+
+ /* pull the ripcord */
+ vb->localtop=0;
+ vb->reap=NULL;
+}
+
+int vorbis_block_clear(vorbis_block *vb){
+ _vorbis_block_ripcord(vb);
+ if(vb->localstore)_ogg_free(vb->localstore);
+
+ memset(vb,0,sizeof(*vb));
+ return(0);
+}
+
+static int _vds_init(vorbis_dsp_state *v,vorbis_info *vi){
+ int i;
+ codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
+ private_state *b=NULL;
+
+ memset(v,0,sizeof(*v));
+ b=(private_state *)(v->backend_state=_ogg_calloc(1,sizeof(*b)));
+
+ v->vi=vi;
+ b->modebits=ilog(ci->modes);
+
+ /* Vorbis I uses only window type 0 */
+ b->window[0]=_vorbis_window(0,ci->blocksizes[0]/2);
+ b->window[1]=_vorbis_window(0,ci->blocksizes[1]/2);
+
+ /* finish the codebooks */
+ if(!ci->fullbooks){
+ ci->fullbooks=(codebook *)_ogg_calloc(ci->books,sizeof(*ci->fullbooks));
+ for(i=0;i<ci->books;i++){
+ vorbis_book_init_decode(ci->fullbooks+i,ci->book_param[i]);
+ /* decode codebooks are now standalone after init */
+ vorbis_staticbook_destroy(ci->book_param[i]);
+ ci->book_param[i]=NULL;
+ }
+ }
+
+ v->pcm_storage=ci->blocksizes[1];
+ v->pcm=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcm));
+ v->pcmret=(ogg_int32_t **)_ogg_malloc(vi->channels*sizeof(*v->pcmret));
+ for(i=0;i<vi->channels;i++)
+ v->pcm[i]=(ogg_int32_t *)_ogg_calloc(v->pcm_storage,sizeof(*v->pcm[i]));
+
+ /* all 1 (large block) or 0 (small block) */
+ /* explicitly set for the sake of clarity */
+ v->lW=0; /* previous window size */
+ v->W=0; /* current window size */
+
+ /* initialize all the mapping/backend lookups */
+ b->mode=(vorbis_look_mapping **)_ogg_calloc(ci->modes,sizeof(*b->mode));
+ for(i=0;i<ci->modes;i++){
+ int mapnum=ci->mode_param[i]->mapping;
+ int maptype=ci->map_type[mapnum];
+ b->mode[i]=_mapping_P[maptype]->look(v,ci->mode_param[i],
+ ci->map_param[mapnum]);
+ }
+ return(0);
+}
+
+int vorbis_synthesis_restart(vorbis_dsp_state *v){
+ vorbis_info *vi=v->vi;
+ codec_setup_info *ci;
+
+ if(!v->backend_state)return -1;
+ if(!vi)return -1;
+ ci=vi->codec_setup;
+ if(!ci)return -1;
+
+ v->centerW=ci->blocksizes[1]/2;
+ v->pcm_current=v->centerW;
+
+ v->pcm_returned=-1;
+ v->granulepos=-1;
+ v->sequence=-1;
+ ((private_state *)(v->backend_state))->sample_count=-1;
+
+ return(0);
+}
+
+int vorbis_synthesis_init(vorbis_dsp_state *v,vorbis_info *vi){
+ _vds_init(v,vi);
+ vorbis_synthesis_restart(v);
+
+ return(0);
+}
+
+void vorbis_dsp_clear(vorbis_dsp_state *v){
+ int i;
+ if(v){
+ vorbis_info *vi=v->vi;
+ codec_setup_info *ci=(codec_setup_info *)(vi?vi->codec_setup:NULL);
+ private_state *b=(private_state *)v->backend_state;
+
+ if(v->pcm){
+ for(i=0;i<vi->channels;i++)
+ if(v->pcm[i])_ogg_free(v->pcm[i]);
+ _ogg_free(v->pcm);
+ if(v->pcmret)_ogg_free(v->pcmret);
+ }
+
+ /* free mode lookups; these are actually vorbis_look_mapping structs */
+ if(ci){
+ for(i=0;i<ci->modes;i++){
+ int mapnum=ci->mode_param[i]->mapping;
+ int maptype=ci->map_type[mapnum];
+ if(b && b->mode)_mapping_P[maptype]->free_look(b->mode[i]);
+ }
+ }
+
+ if(b){
+ if(b->mode)_ogg_free(b->mode);
+ _ogg_free(b);
+ }
+
+ memset(v,0,sizeof(*v));
+ }
+}
+
+/* Unlike in analysis, the window is only partially applied for each
+ block. The time domain envelope is not yet handled at the point of
+ calling (as it relies on the previous block). */
+
+int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){
+ vorbis_info *vi=v->vi;
+ codec_setup_info *ci=(codec_setup_info *)vi->codec_setup;
+ private_state *b=v->backend_state;
+ int i,j;
+
+ if(v->pcm_current>v->pcm_returned && v->pcm_returned!=-1)return(OV_EINVAL);
+
+ v->lW=v->W;
+ v->W=vb->W;
+ v->nW=-1;
+
+ if((v->sequence==-1)||
+ (v->sequence+1 != vb->sequence)){
+ v->granulepos=-1; /* out of sequence; lose count */
+ b->sample_count=-1;
+ }
+
+ v->sequence=vb->sequence;
+
+ if(vb->pcm){ /* no pcm to process if vorbis_synthesis_trackonly
+ was called on block */
+ int n=ci->blocksizes[v->W]/2;
+ int n0=ci->blocksizes[0]/2;
+ int n1=ci->blocksizes[1]/2;
+
+ int thisCenter;
+ int prevCenter;
+
+ if(v->centerW){
+ thisCenter=n1;
+ prevCenter=0;
+ }else{
+ thisCenter=0;
+ prevCenter=n1;
+ }
+
+ /* v->pcm is now used like a two-stage double buffer. We don't want
+ to have to constantly shift *or* adjust memory usage. Don't
+ accept a new block until the old is shifted out */
+
+ /* overlap/add PCM */
+
+ for(j=0;j<vi->channels;j++){
+ /* the overlap/add section */
+ if(v->lW){
+ if(v->W){
+ /* large/large */
+ ogg_int32_t *pcm=v->pcm[j]+prevCenter;
+ ogg_int32_t *p=vb->pcm[j];
+ for(i=0;i<n1;i++)
+ pcm[i]+=p[i];
+ }else{
+ /* large/small */
+ ogg_int32_t *pcm=v->pcm[j]+prevCenter+n1/2-n0/2;
+ ogg_int32_t *p=vb->pcm[j];
+ for(i=0;i<n0;i++)
+ pcm[i]+=p[i];
+ }
+ }else{
+ if(v->W){
+ /* small/large */
+ ogg_int32_t *pcm=v->pcm[j]+prevCenter;
+ ogg_int32_t *p=vb->pcm[j]+n1/2-n0/2;
+ for(i=0;i<n0;i++)
+ pcm[i]+=p[i];
+ for(;i<n1/2+n0/2;i++)
+ pcm[i]=p[i];
+ }else{
+ /* small/small */
+ ogg_int32_t *pcm=v->pcm[j]+prevCenter;
+ ogg_int32_t *p=vb->pcm[j];
+ for(i=0;i<n0;i++)
+ pcm[i]+=p[i];
+ }
+ }
+
+ /* the copy section */
+ {
+ ogg_int32_t *pcm=v->pcm[j]+thisCenter;
+ ogg_int32_t *p=vb->pcm[j]+n;
+ for(i=0;i<n;i++)
+ pcm[i]=p[i];
+ }
+ }
+
+ if(v->centerW)
+ v->centerW=0;
+ else
+ v->centerW=n1;
+
+ /* deal with initial packet state; we do this using the explicit
+ pcm_returned==-1 flag otherwise we're sensitive to first block
+ being short or long */
+
+ if(v->pcm_returned==-1){
+ v->pcm_returned=thisCenter;
+ v->pcm_current=thisCenter;
+ }else{
+ v->pcm_returned=prevCenter;
+ v->pcm_current=prevCenter+
+ ci->blocksizes[v->lW]/4+
+ ci->blocksizes[v->W]/4;
+ }
+
+ }
+
+ /* track the frame number... This is for convenience, but also
+ making sure our last packet doesn't end with added padding. If
+ the last packet is partial, the number of samples we'll have to
+ return will be past the vb->granulepos.
+
+ This is not foolproof! It will be confused if we begin
+ decoding at the last page after a seek or hole. In that case,
+ we don't have a starting point to judge where the last frame
+ is. For this reason, vorbisfile will always try to make sure
+ it reads the last two marked pages in proper sequence */
+
+ if(b->sample_count==-1){
+ b->sample_count=0;
+ }else{
+ b->sample_count+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4;
+ }
+
+ if(v->granulepos==-1){
+ if(vb->granulepos!=-1){ /* only set if we have a position to set to */
+
+ v->granulepos=vb->granulepos;
+
+ /* is this a short page? */
+ if(b->sample_count>v->granulepos){
+ /* corner case; if this is both the first and last audio page,
+ then spec says the end is cut, not beginning */
+ if(vb->eofflag){
+ /* trim the end */
+ /* no preceeding granulepos; assume we started at zero (we'd
+ have to in a short single-page stream) */
+ /* granulepos could be -1 due to a seek, but that would result
+ in a long coun`t, not short count */
+
+ v->pcm_current-=(b->sample_count-v->granulepos);
+ }else{
+ /* trim the beginning */
+ v->pcm_returned+=(b->sample_count-v->granulepos);
+ if(v->pcm_returned>v->pcm_current)
+ v->pcm_returned=v->pcm_current;
+ }
+
+ }
+
+ }
+ }else{
+ v->granulepos+=ci->blocksizes[v->lW]/4+ci->blocksizes[v->W]/4;
+ if(vb->granulepos!=-1 && v->granulepos!=vb->granulepos){
+
+ if(v->granulepos>vb->granulepos){
+ long extra=v->granulepos-vb->granulepos;
+
+ if(extra)
+ if(vb->eofflag){
+ /* partial last frame. Strip the extra samples off */
+ v->pcm_current-=extra;
+ } /* else {Shouldn't happen *unless* the bitstream is out of
+ spec. Either way, believe the bitstream } */
+ } /* else {Shouldn't happen *unless* the bitstream is out of
+ spec. Either way, believe the bitstream } */
+ v->granulepos=vb->granulepos;
+ }
+ }
+
+ /* Update, cleanup */
+
+ if(vb->eofflag)v->eofflag=1;
+ return(0);
+}
+
+/* pcm==NULL indicates we just want the pending samples, no more */
+int vorbis_synthesis_pcmout(vorbis_dsp_state *v,ogg_int32_t ***pcm){
+ vorbis_info *vi=v->vi;
+ if(v->pcm_returned>-1 && v->pcm_returned<v->pcm_current){
+ if(pcm){
+ int i;
+ for(i=0;i<vi->channels;i++)
+ v->pcmret[i]=v->pcm[i]+v->pcm_returned;
+ *pcm=v->pcmret;
+ }
+ return(v->pcm_current-v->pcm_returned);
+ }
+ return(0);
+}
+
+int vorbis_synthesis_read(vorbis_dsp_state *v,int bytes){
+ if(bytes && v->pcm_returned+bytes>v->pcm_current)return(OV_EINVAL);
+ v->pcm_returned+=bytes;
+ return(0);
+}
+
|