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mpv/demux_avi.c

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// AVI file parser for DEMUXER v2.6 by A'rpi/ESP-team
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
extern int verbose; // defined in mplayer.c
#include "stream.h"
#include "demuxer.h"
#include "wine/mmreg.h"
#include "wine/avifmt.h"
#include "wine/vfw.h"
#include "codec-cfg.h"
#include "stheader.h"
//static float avi_pts_frametime=1.0f/25.0f;
float avi_audio_pts=0;
float avi_video_pts=0;
//float avi_video_ftime=0.04;
int skip_video_frames=0;
// Select ds from ID
demux_stream_t* demux_avi_select_stream(demuxer_t *demux,unsigned int id){
int stream_id=avi_stream_id(id);
// printf("demux_avi_select_stream(%d) {a:%d/v:%d}\n",stream_id,
// demux->audio->id,demux->video->id);
if(demux->video->id==-1)
if(demux->v_streams[stream_id])
demux->video->id=stream_id;
if(demux->audio->id==-1)
if(demux->a_streams[stream_id])
demux->audio->id=stream_id;
if(stream_id==demux->audio->id){
if(!demux->audio->sh){
demux->audio->sh=demux->a_streams[stream_id];
if(verbose) printf("Auto-selected AVI audio ID = %d\n",demux->audio->id);
}
return demux->audio;
}
if(stream_id==demux->video->id){
if(!demux->video->sh){
demux->video->sh=demux->v_streams[stream_id];
if(verbose) printf("Auto-selected AVI video ID = %d\n",demux->video->id);
}
return demux->video;
}
if(id!=mmioFOURCC('J','U','N','K')){
// unknown
if(verbose>=2) printf("Unknown chunk: %.4s (%X)\n",(char *) &id,id);
}
return NULL;
}
static float pts_correction=0.0;
static int pts_corrected=0;
static int pts_has_video=0;
static unsigned int pts_corr_bytes=0;
static int demux_avi_read_packet(demuxer_t *demux,unsigned int id,unsigned int len,int idxpos,int flags){
int skip;
float pts=0;
demux_stream_t *ds=demux_avi_select_stream(demux,id);
if(verbose>=3) printf("demux_avi.read_packet: %X\n",id);
if(ds==demux->audio){
if(pts_corrected==0){
// printf("\rYYY-A A: %5.3f V: %5.3f \n",avi_audio_pts,avi_video_pts);
if(pts_has_video){
// we have video pts now
float delay=(float)pts_corr_bytes/((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec;
printf("XXX initial v_pts=%5.3f a_pos=%d (%5.3f) \n",avi_audio_pts,pts_corr_bytes,delay);
//pts_correction=-avi_audio_pts+delay;
pts_correction=delay-avi_audio_pts;
avi_audio_pts+=pts_correction;
pts_corrected=1;
} else
pts_corr_bytes+=len;
}
pts=avi_audio_pts; //+pts_correction;
avi_audio_pts=0;
} else
if(ds==demux->video){
// video
if(skip_video_frames>0){
// drop frame (seeking)
--skip_video_frames;
ds=NULL;
} else {
pts=avi_video_pts;
}
// ezt a 2 sort lehet hogy fell kell majd cserelni:
//avi_video_pts+=avi_pts_frametime;
//avi_video_pts+=(float)avi_header.video.dwScale/(float)avi_header.video.dwRate;
//avi_video_pts+=((sh_video_t*)ds->sh)->frametime;
// FIXME!!!
#if 1
// printf("ds=0x%X\n",ds);
// printf("packno=%d\n",ds->pack_no);
// printf("### pack_no=%d\n",demux->video->pack_no+demux->video->packs);
avi_video_pts = (demux->video->pack_no+demux->video->packs) *
(float)((sh_video_t*)demux->video->sh)->video.dwScale /
(float)((sh_video_t*)demux->video->sh)->video.dwRate;
#else
avi_video_pts+=(float)((sh_video_t*)(demux->video->sh))->video.dwScale/(float)((sh_video_t*)(demux->video->sh))->video.dwRate;
// avi_video_pts+=avi_video_ftime;
#endif
// printf("\rYYY-V A: %5.3f V: %5.3f \n",avi_audio_pts,avi_video_pts);
avi_audio_pts=avi_video_pts+pts_correction;
pts_has_video=1;
}
// len=stream_read_dword_le(demux->stream);
skip=(len+1)&(~1); // total bytes in this chunk
if(ds){
if(verbose>=2) printf("DEMUX_AVI: Read %d data bytes from packet %04X\n",len,id);
ds_read_packet(ds,demux->stream,len,pts,idxpos,flags);
skip-=len;
}
if(skip){
if(verbose>=2) printf("DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id);
stream_skip(demux->stream,skip);
}
return ds?1:0;
}
//static int num_elementary_packets100=0;
//static int num_elementary_packets101=0;
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer(demuxer_t *demux){
unsigned int id=0;
unsigned int len;
int max_packs=128;
int ret=0;
do{
int flags=0;
AVIINDEXENTRY *idx=NULL;
#if 0
demux->filepos=stream_tell(demux->stream);
if(demux->filepos>=demux->movi_end){
demux->stream->eof=1;
return 0;
}
if(stream_eof(demux->stream)) return 0;
#endif
if(demux->idx_size>0 && demux->idx_pos<demux->idx_size){
unsigned int pos;
//if(demux->idx_pos<0) printf("Fatal! idx_pos=%d\n",demux->idx_pos);
idx=&((AVIINDEXENTRY *)demux->idx)[demux->idx_pos++];
//printf("[%d]",demux->idx_pos);fflush(stdout);
//stream_seek(demux->stream,idx.dwChunkOffset);
//printf("IDX pos=%X idx.pos=%X idx.size=%X idx.flags=%X\n",demux->filepos,
// pos-4,idx->dwChunkLength,idx->dwFlags);
if(idx->dwFlags&AVIIF_LIST){
// LIST
continue;
}
if(!demux_avi_select_stream(demux,idx->ckid)){
if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
continue; // skip this chunk
}
pos=idx->dwChunkOffset+demux->idx_offset;
if(pos<demux->movi_start || pos>=demux->movi_end){
printf("ChunkOffset out of range! idx=0x%X \n",pos);
continue;
}
#if 0
if(pos!=demux->filepos){
printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
}
#endif
stream_seek(demux->stream,pos);
demux->filepos=stream_tell(demux->stream);
id=stream_read_dword_le(demux->stream);
if(stream_eof(demux->stream)) return 0; // EOF!
if(id!=idx->ckid){
if(verbose) printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",(char *)&id,(char *)&idx->ckid);
id=idx->ckid;
// continue;
}
len=stream_read_dword_le(demux->stream);
// if((len&(~1))!=(idx->dwChunkLength&(~1))){
// if((len)!=(idx->dwChunkLength)){
if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
if(verbose) printf("ChunkSize mismatch! raw=%d idx=%ld \n",len,idx->dwChunkLength);
len=idx->dwChunkLength;
// continue;
}
if(idx->dwFlags&AVIIF_KEYFRAME) flags=1;
} else {
demux->filepos=stream_tell(demux->stream);
if(demux->filepos>=demux->movi_end){
demux->stream->eof=1;
return 0;
}
id=stream_read_dword_le(demux->stream);
len=stream_read_dword_le(demux->stream);
if(stream_eof(demux->stream)) return 0; // EOF!
if(id==mmioFOURCC('L','I','S','T')){
id=stream_read_dword_le(demux->stream); // list type
continue;
}
}
ret=demux_avi_read_packet(demux,id,len,demux->idx_pos-1,flags);
if(!ret && skip_video_frames<=0)
if(--max_packs==0){
demux->stream->eof=1;
printf("demux: file doesn't contain the selected audio or video stream\n");
return 0;
}
} while(ret!=1);
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer_ni(demuxer_t *demux,demux_stream_t* ds){
unsigned int id=0;
unsigned int len;
int max_packs=128;
int ret=0;
do{
int flags=0;
AVIINDEXENTRY *idx=NULL;
int idx_pos=0;
demux->filepos=stream_tell(demux->stream);
if(ds==demux->video) idx_pos=demux->idx_pos_v++; else
if(ds==demux->audio) idx_pos=demux->idx_pos_a++; else
idx_pos=demux->idx_pos++;
if(demux->idx_size>0 && idx_pos<demux->idx_size){
unsigned int pos;
idx=&((AVIINDEXENTRY *)demux->idx)[idx_pos];
// idx=&demux->idx[idx_pos];
if(idx->dwFlags&AVIIF_LIST){
// LIST
continue;
}
if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){
if(verbose>2) printf("Skip chunk %.4s (0x%X) \n",(char *)&idx->ckid,(unsigned int)idx->ckid);
continue; // skip this chunk
}
pos=idx->dwChunkOffset+demux->idx_offset;
if(pos<demux->movi_start || pos>=demux->movi_end){
printf("ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos);
continue;
}
#if 0
if(pos!=demux->filepos){
printf("Warning! pos=0x%X idx.pos=0x%X diff=%d \n",demux->filepos,pos,pos-demux->filepos);
}
#endif
stream_seek(demux->stream,pos);
id=stream_read_dword_le(demux->stream);
if(stream_eof(demux->stream)) return 0;
if(id!=idx->ckid){
if(verbose) printf("ChunkID mismatch! raw=%.4s idx=%.4s \n",(char *)&id,(char *)&idx->ckid);
id=idx->ckid;
// continue;
}
len=stream_read_dword_le(demux->stream);
// if((len&(~1))!=(idx->dwChunkLength&(~1))){
// if((len)!=(idx->dwChunkLength)){
if((len!=idx->dwChunkLength)&&((len+1)!=idx->dwChunkLength)){
if(verbose) printf("ChunkSize mismatch! raw=%d idx=%ld \n",len,idx->dwChunkLength);
len=idx->dwChunkLength;
// continue;
}
if(idx->dwFlags&AVIIF_KEYFRAME) flags=1;
} else return 0;
ret=demux_avi_read_packet(demux,id,len,idx_pos,flags);
if(!ret && skip_video_frames<=0)
if(--max_packs==0){
demux->stream->eof=1;
printf("demux: file doesn't contain the selected audio or video stream\n");
return 0;
}
} while(ret!=1);
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_avi_fill_buffer_nini(demuxer_t *demux,demux_stream_t* ds){
unsigned int id=0;
unsigned int len;
int ret=0;
int *fpos=NULL;
if(ds==demux->video) fpos=&demux->idx_pos_v; else
if(ds==demux->audio) fpos=&demux->idx_pos_a; else
return 0;
stream_seek(demux->stream,fpos[0]);
do{
demux->filepos=stream_tell(demux->stream);
if(demux->filepos>=demux->movi_end){
demux->stream->eof=1;
return 0;
}
if(stream_eof(demux->stream)) return 0;
id=stream_read_dword_le(demux->stream);
len=stream_read_dword_le(demux->stream);
if(id==mmioFOURCC('L','I','S','T')){
id=stream_read_dword_le(demux->stream); // list type
continue;
}
if(ds==demux_avi_select_stream(demux,id)){
// read it!
ret=demux_avi_read_packet(demux,id,len,demux->idx_pos-1,0);
} else {
// skip it!
int skip=(len+1)&(~1); // total bytes in this chunk
stream_skip(demux->stream,skip);
}
} while(ret!=1);
fpos[0]=stream_tell(demux->stream);
return 1;
}
extern float initial_pts_delay;
void demux_seek_avi(demuxer_t *demuxer,float rel_seek_secs,int flags){
demux_stream_t *d_audio=demuxer->audio;
demux_stream_t *d_video=demuxer->video;
sh_audio_t *sh_audio=d_audio->sh;
sh_video_t *sh_video=d_video->sh;
float skip_audio_secs=0;
//FIXME: OFF_T - Didn't check AVI case yet (avi files can't be >2G anyway?)
//================= seek in AVI ==========================
int rel_seek_frames=rel_seek_secs*sh_video->fps;
int video_chunk_pos=d_video->pos;
int i;
skip_video_frames=0;
avi_audio_pts=0;
// ------------ STEP 1: find nearest video keyframe chunk ------------
// find nearest video keyframe chunk pos:
if(rel_seek_frames>0){
// seek forward
while(video_chunk_pos<demuxer->idx_size){
int id=((AVIINDEXENTRY *)demuxer->idx)[video_chunk_pos].ckid;
if(avi_stream_id(id)==d_video->id){ // video frame
if((--rel_seek_frames)<0 && ((AVIINDEXENTRY *)demuxer->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
}
++video_chunk_pos;
}
} else {
// seek backward
while(video_chunk_pos>=0){
int id=((AVIINDEXENTRY *)demuxer->idx)[video_chunk_pos].ckid;
if(avi_stream_id(id)==d_video->id){ // video frame
if((++rel_seek_frames)>0 && ((AVIINDEXENTRY *)demuxer->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break;
}
--video_chunk_pos;
}
}
demuxer->idx_pos_a=demuxer->idx_pos_v=demuxer->idx_pos=video_chunk_pos;
// re-calc video pts:
d_video->pack_no=0;
for(i=0;i<video_chunk_pos;i++){
int id=((AVIINDEXENTRY *)demuxer->idx)[i].ckid;
if(avi_stream_id(id)==d_video->id) ++d_video->pack_no;
}
sh_video->num_frames=d_video->pack_no;
avi_video_pts=d_video->pack_no*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
d_video->pos=video_chunk_pos;
// ------------ STEP 2: seek audio, find the right chunk & pos ------------
d_audio->pack_no=0;
d_audio->dpos=0;
if(sh_audio){
int i;
// int apos=0;
int last=0;
int len=0;
int skip_audio_bytes=0;
int curr_audio_pos=-1;
int audio_chunk_pos=-1;
int chunk_max=(demuxer->type==DEMUXER_TYPE_AVI)?video_chunk_pos:demuxer->idx_size;
if(sh_audio->audio.dwSampleSize){
// constant rate audio stream
#if 0
int align;
curr_audio_pos=(avi_video_pts) * sh_audio->wf->nAvgBytesPerSec;
if(curr_audio_pos<0)curr_audio_pos=0;
align=sh_audio->audio.dwSampleSize;
if(sh_audio->wf->nBlockAlign>align) align=sh_audio->wf->nBlockAlign;
curr_audio_pos/=align;
curr_audio_pos*=align;
#else
curr_audio_pos=(avi_video_pts)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
curr_audio_pos*=sh_audio->audio.dwSampleSize;
#endif
// find audio chunk pos:
for(i=0;i<chunk_max;i++){
int id=((AVIINDEXENTRY *)demuxer->idx)[i].ckid;
if(avi_stream_id(id)==d_audio->id){
len=((AVIINDEXENTRY *)demuxer->idx)[i].dwChunkLength;
audio_chunk_pos=i; ++d_audio->pack_no;
if(d_audio->dpos<=curr_audio_pos && curr_audio_pos<(d_audio->dpos+len)){
//if(verbose)printf("break;\n");
break;
}
d_audio->dpos+=len;
}
}
skip_audio_bytes=curr_audio_pos-d_audio->dpos;
} else {
// VBR audio
int chunks=(avi_video_pts)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
audio_chunk_pos=0;
// find audio chunk pos:
for(i=0;i<demuxer->idx_size && chunks>0;i++){
int id=((AVIINDEXENTRY *)demuxer->idx)[i].ckid;
if(avi_stream_id(id)==d_audio->id){
len=((AVIINDEXENTRY *)demuxer->idx)[i].dwChunkLength;
if(i>chunk_max){
skip_audio_bytes+=len;
} else {
++d_audio->pack_no;
d_audio->dpos+=len;
audio_chunk_pos=i;
}
--chunks;
}
}
//if(audio_chunk_pos>chunk_max) audio_chunk_pos=chunk_max;
// printf("VBR seek: %5.3f -> chunk_no %d -> chunk_idx %d + skip %d \n",
// avi_video_pts, audio_chunk_pos, );
}
// Now we have:
// audio_chunk_pos = chunk no in index table (it's <=chunk_max)
// skip_audio_bytes = bytes to be skipped after chunk seek
// d-audio->pack_no = chunk_no in stream at audio_chunk_pos
// d_audio->dpos = bytepos in stream at audio_chunk_pos
// let's seek!
// update stream position:
d_audio->pos=audio_chunk_pos;
// d_audio->dpos=apos;
// d_audio->pts=initial_pts_delay+(float)apos/(float)sh_audio->wf->nAvgBytesPerSec;
if(demuxer->type==DEMUXER_TYPE_AVI){
// interleaved stream:
if(audio_chunk_pos<video_chunk_pos){
// calc skip_video_frames & adjust video pts counter:
for(i=audio_chunk_pos;i<video_chunk_pos;i++){
int id=((AVIINDEXENTRY *)demuxer->idx)[i].ckid;
if(avi_stream_id(id)==d_video->id) ++skip_video_frames;
}
// requires for correct audio pts calculation (demuxer):
avi_video_pts-=skip_video_frames*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate;
demuxer->idx_pos_a=demuxer->idx_pos_v=demuxer->idx_pos=audio_chunk_pos;
}
} else {
// non-interleaved stream:
demuxer->idx_pos_a=audio_chunk_pos;
demuxer->idx_pos_v=video_chunk_pos;
demuxer->idx_pos=(audio_chunk_pos<video_chunk_pos)?audio_chunk_pos:video_chunk_pos;
}
if(verbose) printf("SEEK: idx=%d (a:%d v:%d) v.skip=%d a.skip=%d/%4.3f \n",
demuxer->idx_pos,audio_chunk_pos,video_chunk_pos,
skip_video_frames,skip_audio_bytes,skip_audio_secs);
if(skip_audio_bytes){
demux_read_data(d_audio,NULL,skip_audio_bytes);
//d_audio->pts=0; // PTS is outdated because of the raw data skipping
}
resync_audio_stream(sh_audio);
// sh_audio->timer=-skip_audio_secs;
}
}
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