[Mplayer-cvslog] CVS: main seek.c,NONE,1.1
Arpi of Ize
arpi at mplayer.dev.hu
Sat Jul 28 23:23:47 CEST 2001
Update of /cvsroot/mplayer/main
In directory mplayer:/var/tmp.root/cvs-serv17186
Added Files:
seek.c
Log Message:
seeking code - initial version
--- NEW FILE ---
if(file_format==DEMUXER_TYPE_AVI && demuxer->idx_size<=0){
printf("Can't seek in raw .AVI streams! (index required, try with the -idx switch!) \n");
} else {
int skip_audio_bytes=0;
float skip_audio_secs=0;
// clear demux buffers:
if(sh_audio){ ds_free_packs(d_audio);sh_audio->a_buffer_len=0;}
ds_free_packs(d_video);
// printf("sh_audio->a_buffer_len=%d \n",sh_audio->a_buffer_len);
switch(file_format){
case DEMUXER_TYPE_AVI: {
//================= seek in AVI ==========================
int rel_seek_frames=rel_seek_secs*sh_video->fps;
int curr_audio_pos=0;
int audio_chunk_pos=-1;
int video_chunk_pos=d_video->pos;
skip_video_frames=0;
avi_audio_pts=0;
// 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;
++skip_audio_bytes;
}
++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;
--skip_audio_bytes;
}
--video_chunk_pos;
}
}
demuxer->idx_pos_a=demuxer->idx_pos_v=demuxer->idx_pos=video_chunk_pos;
// printf("%d frames skipped\n",skip_audio_bytes);
// 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;
if(sh_audio){
int i;
int apos=0;
int last=0;
int len=0;
// calc new audio position in audio stream: (using avg.bps value)
curr_audio_pos=(avi_video_pts) * sh_audio->wf->nAvgBytesPerSec;
if(curr_audio_pos<0)curr_audio_pos=0;
#if 1
curr_audio_pos&=~15; // requires for PCM formats!!!
#else
curr_audio_pos/=sh_audio->wf->nBlockAlign;
curr_audio_pos*=sh_audio->wf->nBlockAlign;
demuxer->audio_seekable=1;
#endif
// find audio chunk pos:
for(i=0;i<video_chunk_pos;i++){
int id=((AVIINDEXENTRY *)demuxer->idx)[i].ckid;
if(avi_stream_id(id)==d_audio->id){
len=((AVIINDEXENTRY *)demuxer->idx)[i].dwChunkLength;
last=i;
if(apos<=curr_audio_pos && curr_audio_pos<(apos+len)){
if(verbose)printf("break;\n");
break;
}
apos+=len;
}
}
if(verbose)printf("XXX i=%d last=%d apos=%d curr_audio_pos=%d \n",
i,last,apos,curr_audio_pos);
// audio_chunk_pos=last; // maybe wrong (if not break; )
audio_chunk_pos=i; // maybe wrong (if not break; )
skip_audio_bytes=curr_audio_pos-apos;
// 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;
demuxer->idx_pos_a=demuxer->idx_pos_v=demuxer->idx_pos=audio_chunk_pos;
if(!(sh_audio->codec->flags&CODECS_FLAG_SEEKABLE)){
#if 0
// curr_audio_pos=apos; // selected audio codec can't seek in chunk
skip_audio_secs=(float)skip_audio_bytes/(float)sh_audio->wf->nAvgBytesPerSec;
//printf("Seek_AUDIO: %d bytes --> %5.3f secs\n",skip_audio_bytes,skip_audio_secs);
skip_audio_bytes=0;
#else
int d=skip_audio_bytes % sh_audio->wf->nBlockAlign;
skip_audio_bytes-=d;
// curr_audio_pos-=d;
skip_audio_secs=(float)d/(float)sh_audio->wf->nAvgBytesPerSec;
//printf("Seek_AUDIO: %d bytes --> %5.3f secs\n",d,skip_audio_secs);
#endif
}
// now: audio_chunk_pos=pos in index
// skip_audio_bytes=bytes to skip from that chunk
// skip_audio_secs=time to play audio before video (if can't skip)
// calc skip_video_frames & adjust video pts counter:
// i=last;
for(i=demuxer->idx_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;
}
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);
}
break;
case DEMUXER_TYPE_ASF: {
//================= seek in ASF ==========================
float p_rate=10; // packets / sec
int rel_seek_packs=rel_seek_secs*p_rate;
int rel_seek_bytes=rel_seek_packs*asf_packetsize;
int newpos;
//printf("ASF: packs: %d duration: %d \n",(int)fileh.packets,*((int*)&fileh.duration));
// printf("ASF_seek: %d secs -> %d packs -> %d bytes \n",
// rel_seek_secs,rel_seek_packs,rel_seek_bytes);
newpos=demuxer->filepos+rel_seek_bytes;
if(newpos<0 || newpos<demuxer->movi_start) newpos=demuxer->movi_start;
// printf("\r -- asf: newpos=%d -- \n",newpos);
stream_seek(demuxer->stream,newpos);
ds_fill_buffer(d_video);
if(sh_audio) ds_fill_buffer(d_audio);
while(1){
if(sh_audio){
// sync audio:
if (d_video->pts > d_audio->pts){
if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
continue;
}
}
if(d_video->flags&1) break; // found a keyframe!
if(!ds_fill_buffer(d_video)) break; // skip frame. EOF?
}
}
break;
case DEMUXER_TYPE_MPEG_ES:
case DEMUXER_TYPE_MPEG_PS: {
//================= seek in MPEG ==========================
int newpos;
if(!sh_video->i_bps) // unspecified?
newpos=demuxer->filepos+2324*75*rel_seek_secs; // 174.3 kbyte/sec
else
newpos=demuxer->filepos+(sh_video->i_bps)*rel_seek_secs;
if(newpos<seek_to_byte) newpos=seek_to_byte;
newpos&=~(STREAM_BUFFER_SIZE-1); /* sector boundary */
stream_seek(demuxer->stream,newpos);
// re-sync video:
videobuf_code_len=0; // reset ES stream buffer
while(1){
int i=sync_video_packet(d_video);
if(i==0x1B3 || i==0x1B8) break; // found it!
if(!i || !skip_video_packet(d_video)){ eof=1; break;} // EOF
}
}
break;
} // switch(file_format)
//====================== re-sync audio: =====================
if(sh_audio){
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
}
current_module="resync_audio";
resync_audio_stream(sh_audio);
// re-sync PTS (MPEG-PS only!!!)
if(file_format==DEMUXER_TYPE_MPEG_PS)
if(d_video->pts && d_audio->pts){
if (d_video->pts < d_audio->pts){
} else {
while(d_video->pts > d_audio->pts){
skip_audio_frame(sh_audio);
}
}
}
current_module="audio_reset";
audio_out->reset(); // stop audio, throwing away buffered data
current_module=NULL;
c_total=0; // kell ez?
printf("A:%6.1f V:%6.1f A-V:%7.3f",d_audio->pts,d_video->pts,0.0f);
printf(" ct:%7.3f \r",c_total);fflush(stdout);
} else {
printf("A: --- V:%6.1f \r",d_video->pts);fflush(stdout);
}
// Set OSD:
if(osd_level){
int len=((demuxer->movi_end-demuxer->movi_start)>>8);
if(len>0){
osd_visible=sh_video->fps; // 1 sec
vo_osd_progbar_type=0;
vo_osd_progbar_value=(demuxer->filepos-demuxer->movi_start)/len;
}
}
max_pts_correction=0.1;
frame_corr_num=0; // -5
frame_correction=0;
force_redraw=5;
if(sh_audio) sh_audio->timer=-skip_audio_secs;
sh_video->timer=0; // !!!!!!
audio_time_usage=0; video_time_usage=0; vout_time_usage=0;
}
rel_seek_secs=0;
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