********************************************************************
function: illustrate simple use of chained bitstream and vorbisfile.a
- last mod: $Id: chaining_example.c,v 1.17 2002/07/11 06:40:47 xiphmont Exp $
+ last mod: $Id: chaining_example.c,v 1.18 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
if(ov_seekable(&ov)){
printf("Input bitstream contained %ld logical bitstream section(s).\n",
ov_streams(&ov));
+ printf("Total bitstream samples: %ld\n\n",
+ (long)ov_pcm_total(&ov,-1));
printf("Total bitstream playing time: %ld seconds\n\n",
(long)ov_time_total(&ov,-1));
********************************************************************
function: bitrate tracking and management
- last mod: $Id: bitrate.c,v 1.20 2002/07/18 02:12:20 xiphmont Exp $
+ last mod: $Id: bitrate.c,v 1.21 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
int vorbis_bitrate_managed(vorbis_block *vb){
vorbis_dsp_state *vd=vb->vd;
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
bitrate_manager_state *bm=&b->bms;
if(bm->queue_binned)return(1);
int i;
vorbis_block_internal *vbi=vb->internal;
vorbis_dsp_state *vd=vb->vd;
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
bitrate_manager_state *bm=&b->bms;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
}
int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd,ogg_packet *op){
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
bitrate_manager_state *bm=&b->bms;
if(bm->queue_size==0){
********************************************************************
function: PCM data vector blocking, windowing and dis/reassembly
- last mod: $Id: block.c,v 1.67 2002/07/11 06:40:48 xiphmont Exp $
+ last mod: $Id: block.c,v 1.68 2002/10/11 11:14:41 xiphmont Exp $
Handle windowing, overlap-add, etc of the PCM vectors. This is made
more amusing by Vorbis' current two allowed block sizes.
static int _vds_shared_init(vorbis_dsp_state *v,vorbis_info *vi,int encp){
int i;
codec_setup_info *ci=vi->codec_setup;
- backend_lookup_state *b=NULL;
+ private_state *b=NULL;
memset(v,0,sizeof(*v));
b=v->backend_state=_ogg_calloc(1,sizeof(*b));
/* arbitrary settings and spec-mandated numbers get filled in here */
int vorbis_analysis_init(vorbis_dsp_state *v,vorbis_info *vi){
- backend_lookup_state *b=NULL;
+ private_state *b=NULL;
_vds_shared_init(v,vi,1);
b=v->backend_state;
if(v){
vorbis_info *vi=v->vi;
codec_setup_info *ci=(vi?vi->codec_setup:NULL);
- backend_lookup_state *b=v->backend_state;
+ private_state *b=v->backend_state;
if(b){
if(b->window[0])
float **vorbis_analysis_buffer(vorbis_dsp_state *v, int vals){
int i;
vorbis_info *vi=v->vi;
- backend_lookup_state *b=v->backend_state;
+ private_state *b=v->backend_state;
/* free header, header1, header2 */
if(b->header)_ogg_free(b->header);b->header=NULL;
int vorbis_analysis_wrote(vorbis_dsp_state *v, int vals){
vorbis_info *vi=v->vi;
codec_setup_info *ci=vi->codec_setup;
- /*backend_lookup_state *b=v->backend_state;*/
if(vals<=0){
int order=32;
int i;
vorbis_info *vi=v->vi;
codec_setup_info *ci=vi->codec_setup;
- backend_lookup_state *b=v->backend_state;
+ private_state *b=v->backend_state;
vorbis_look_psy_global *g=b->psy_g_look;
- vorbis_info_psy_global *gi=&ci->psy_g_param;
long beginW=v->centerW-ci->blocksizes[v->W]/2,centerNext;
vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
v->pcm_returned=-1;
v->granulepos=-1;
v->sequence=-1;
+ ((private_state *)(v->backend_state))->sample_count=-1;
return(0);
}
int vorbis_synthesis_blockin(vorbis_dsp_state *v,vorbis_block *vb){
vorbis_info *vi=v->vi;
codec_setup_info *ci=vi->codec_setup;
+ private_state *b=v->backend_state;
int i,j;
if(!vb)return(OV_EINVAL);
v->W=vb->W;
v->nW=-1;
- if(v->sequence+1 != vb->sequence)v->granulepos=-1; /* out of sequence;
- lose count */
+ 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){ /* not pcm to process if vorbis_synthesis_trackonly
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(v->granulepos>vb->granulepos){
long extra=v->granulepos-vb->granulepos;
-
- if(vb->eofflag){
- /* partial last frame. Strip the extra samples off */
- v->pcm_current-=extra;
- }else if(vb->sequence == 1){
- /* ^^^ argh, this can be 1 from seeking! */
-
-
- /* partial first frame. Discard extra leading samples */
- v->pcm_returned+=extra;
- if(v->pcm_returned>v->pcm_current)
- v->pcm_returned=v->pcm_current;
-
- } /* else {Shouldn't happen *unless* the bitstream is out of
- spec. Either way, believe the bitstream } */
+
+ 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;
********************************************************************
function: libvorbis codec headers
- last mod: $Id: codec_internal.h,v 1.15 2002/06/28 22:19:35 xiphmont Exp $
+ last mod: $Id: codec_internal.h,v 1.16 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
#include "psy.h"
#include "bitrate.h"
-typedef struct backend_lookup_state {
+typedef struct private_state {
/* local lookup storage */
envelope_lookup *ve; /* envelope lookup */
float *window[2];
bitrate_manager_state bms;
-} backend_lookup_state;
+ ogg_int64_t sample_count;
+
+} private_state;
/* codec_setup_info contains all the setup information specific to the
specific compression/decompression mode in progress (eg,
********************************************************************
function: PCM data envelope analysis
- last mod: $Id: envelope.c,v 1.52 2002/07/13 10:18:33 giles Exp $
+ last mod: $Id: envelope.c,v 1.53 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
vorbis_info *vi=v->vi;
codec_setup_info *ci=vi->codec_setup;
vorbis_info_psy_global *gi=&ci->psy_g_param;
- envelope_lookup *ve=((backend_lookup_state *)(v->backend_state))->ve;
+ envelope_lookup *ve=((private_state *)(v->backend_state))->ve;
long i,j;
int first=ve->current/ve->searchstep;
}
int _ve_envelope_mark(vorbis_dsp_state *v){
- envelope_lookup *ve=((backend_lookup_state *)(v->backend_state))->ve;
+ envelope_lookup *ve=((private_state *)(v->backend_state))->ve;
vorbis_info *vi=v->vi;
codec_setup_info *ci=vi->codec_setup;
long centerW=v->centerW;
********************************************************************
function: maintain the info structure, info <-> header packets
- last mod: $Id: info.c,v 1.60 2002/09/23 21:46:59 xiphmont Exp $
+ last mod: $Id: info.c,v 1.61 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
int ret=OV_EIMPL;
vorbis_info *vi=v->vi;
oggpack_buffer opb;
- backend_lookup_state *b=v->backend_state;
+ private_state *b=v->backend_state;
if(!b){
ret=OV_EFAULT;
********************************************************************
function: channel mapping 0 implementation
- last mod: $Id: mapping0.c,v 1.53 2002/07/13 06:12:46 xiphmont Exp $
+ last mod: $Id: mapping0.c,v 1.54 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
vorbis_dsp_state *vd=vb->vd;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
- backend_lookup_state *b=vb->vd->backend_state;
+ private_state *b=vb->vd->backend_state;
vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
int n=vb->pcmend;
int i,j,k;
vorbis_dsp_state *vd=vb->vd;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)l;
int i,j;
********************************************************************
function: 16kHz settings
- last mod: $Id: psych_16.h,v 1.1 2002/07/10 03:04:22 xiphmont Exp $
+ last mod: $Id: psych_16.h,v 1.2 2002/10/11 11:14:42 xiphmont Exp $
********************************************************************/
static double _noise_thresh_16[4]={ .3,.5,.5,.5 };
-static int _noise_start_16_short[3]={ 256,128,9999 };
static int _noise_start_16[3]={ 256,256,9999 };
static int _noise_part_16[4]={ 8,8,8,8 };
********************************************************************
function: 16kHz settings
- last mod: $Id: setup_16.h,v 1.4 2002/07/11 10:02:29 xiphmont Exp $
+ last mod: $Id: setup_16.h,v 1.5 2002/10/11 11:14:42 xiphmont Exp $
********************************************************************/
_psy_noise_suppress,
_psy_compand_8,
- _psy_compand_8_mapping,
- _psy_compand_8_mapping,
+ _psy_compand_16_mapping,
+ _psy_compand_16_mapping,
{_noise_start_16,_noise_start_16},
{ _noise_part_16, _noise_part_16},
_psy_noise_suppress,
_psy_compand_8,
- _psy_compand_8_mapping,
- _psy_compand_8_mapping,
+ _psy_compand_16_mapping,
+ _psy_compand_16_mapping,
{_noise_start_16,_noise_start_16},
{ _noise_part_16, _noise_part_16},
********************************************************************
function: single-block PCM synthesis
- last mod: $Id: synthesis.c,v 1.28 2002/07/11 06:40:50 xiphmont Exp $
+ last mod: $Id: synthesis.c,v 1.29 2002/10/11 11:14:41 xiphmont Exp $
********************************************************************/
int vorbis_synthesis(vorbis_block *vb,ogg_packet *op){
vorbis_dsp_state *vd=vb->vd;
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
oggpack_buffer *opb=&vb->opb;
/* more setup */
vb->granulepos=op->granulepos;
- vb->sequence=op->packetno-3; /* first block is third packet */
+ vb->sequence=op->packetno;
vb->eofflag=op->e_o_s;
/* alloc pcm passback storage */
Useful for sequential 'fast forward' */
int vorbis_synthesis_trackonly(vorbis_block *vb,ogg_packet *op){
vorbis_dsp_state *vd=vb->vd;
- backend_lookup_state *b=vd->backend_state;
+ private_state *b=vd->backend_state;
vorbis_info *vi=vd->vi;
codec_setup_info *ci=vi->codec_setup;
oggpack_buffer *opb=&vb->opb;
/* more setup */
vb->granulepos=op->granulepos;
- vb->sequence=op->packetno-3; /* first block is third packet */
+ vb->sequence=op->packetno;
vb->eofflag=op->e_o_s;
/* no pcm */
projects / platform / upstream / libvorbis.git / commitdiff