1
0
mirror of https://github.com/mpv-player/mpv synced 2025-01-07 07:30:09 +00:00

some cleanup, asf/mpg seek precision improved

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@1409 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi 2001-07-29 00:39:47 +00:00
parent d2fdc3a30f
commit 67df6a8622
2 changed files with 72 additions and 40 deletions

View File

@ -372,28 +372,47 @@ int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen){
void resync_audio_stream(sh_audio_t *sh_audio){
switch(sh_audio->codec->driver){
case 1:
case 1: // MPEG
MP3_DecodeFrame(NULL,-2); // resync
MP3_DecodeFrame(NULL,-2); // resync
MP3_DecodeFrame(NULL,-2); // resync
break;
case 3:
case 3: // AC3
ac3_bitstream_reset(); // reset AC3 bitstream buffer
// if(verbose){ printf("Resyncing AC3 audio...");fflush(stdout);}
sh_audio->ac3_frame=ac3_decode_frame(); // resync
// if(verbose) printf(" OK!\n");
break;
case 4:
case 7:
case 4: // ACM
case 7: // DShow
sh_audio->a_in_buffer_len=0; // reset ACM/DShow audio buffer
break;
}
}
void skip_audio_frame(sh_audio_t *sh_audio){
switch(sh_audio->codec->driver){
case 1: MP3_DecodeFrame(NULL,-2);break; // skip MPEG frame
case 3: sh_audio->ac3_frame=ac3_decode_frame();break; // skip AC3 frame
case 4:
case 7: {
int skip=sh_audio->wf->nBlockAlign;
if(skip<16){
skip=(sh_audio->wf->nAvgBytesPerSec/16)&(~7);
if(skip<16) skip=16;
}
demux_read_data(sh_audio->ds,NULL,skip);
break;
}
case 2: // AVI PCM
case 8: // DVD PCM
case 5: {// aLaw
int skip=sh_audio->i_bps/16;
skip=skip&(~3);
demux_read_data(sh_audio->ds,NULL,skip);
break;
}
default: ds_fill_buffer(sh_audio->ds); // skip PCM frame
}
}

85
seek.c
View File

@ -23,7 +23,7 @@ extern int asf_packetsize; // for seeking
extern float avi_audio_pts;
extern float avi_video_pts;
extern float avi_video_ftime;
//extern float avi_video_ftime;
extern int skip_video_frames;
extern float initial_pts_delay;
extern int seek_to_byte;
@ -38,7 +38,6 @@ int demux_seek(demuxer_t *demuxer,float rel_seek_secs,int flags){
demux_stream_t *d_video=demuxer->video;
sh_audio_t *sh_audio=d_audio->sh;
sh_video_t *sh_video=d_video->sh;
int skip_audio_bytes=0;
float skip_audio_secs=0;
if(demuxer->file_format==DEMUXER_TYPE_AVI && demuxer->idx_size<=0){
@ -75,7 +74,7 @@ switch(demuxer->file_format){
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;
// ++skip_audio_bytes;
}
++video_chunk_pos;
}
@ -85,7 +84,7 @@ switch(demuxer->file_format){
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;
// --skip_audio_bytes;
}
--video_chunk_pos;
}
@ -107,6 +106,7 @@ switch(demuxer->file_format){
int apos=0;
int last=0;
int len=0;
int skip_audio_bytes=0;
// calc new audio position in audio stream: (using avg.bps value)
curr_audio_pos=(avi_video_pts) * sh_audio->wf->nAvgBytesPerSec;
@ -170,12 +170,17 @@ switch(demuxer->file_format){
}
// 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);
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);
}
}
break;
@ -195,13 +200,19 @@ switch(demuxer->file_format){
stream_seek(demuxer->stream,newpos);
ds_fill_buffer(d_video);
if(sh_audio) ds_fill_buffer(d_audio);
if(sh_audio){
ds_fill_buffer(d_audio);
resync_audio_stream(sh_audio);
}
while(1){
if(sh_audio){
if(sh_audio && !d_audio->eof){
float a_pts=d_audio->pts;
a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
// sync audio:
if (d_video->pts > d_audio->pts){
if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
if (d_video->pts > a_pts){
skip_audio_frame(sh_audio);
// if(!ds_fill_buffer(d_audio)) sh_audio=NULL; // skip audio. EOF?
continue;
}
}
@ -224,13 +235,31 @@ switch(demuxer->file_format){
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);
ds_fill_buffer(d_video);
if(sh_audio){
ds_fill_buffer(d_audio);
resync_audio_stream(sh_audio);
}
while(1){
int i;
if(sh_audio && !d_audio->eof && d_video->pts && d_audio->pts){
float a_pts=d_audio->pts;
a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
if(d_video->pts>a_pts){
skip_audio_frame(sh_audio); // sync audio
continue;
}
}
i=sync_video_packet(d_video);
if(i==0x1B3 || i==0x1B8) break; // found it!
if(!i || !skip_video_packet(d_video)) break; // EOF?
}
}
break;
@ -238,27 +267,11 @@ switch(demuxer->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(demuxer->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);
}
}
}
if(verbose){
float a_pts=d_audio->pts;
a_pts+=(ds_tell_pts(d_audio)-sh_audio->a_in_buffer_len)/(float)sh_audio->i_bps;
printf("SEEK: A: %5.3f V: %5.3f A-V: %5.3f \n",a_pts,d_video->pts,a_pts-d_video->pts);
}
printf("A:%6.1f V:%6.1f A-V:%7.3f ct: ? \r",d_audio->pts,d_video->pts,0.0f);
} else {
printf("A: --- V:%6.1f \r",d_video->pts);