diff options
Diffstat (limited to 'libmpdemux/demux_avi.c')
| -rw-r--r-- | libmpdemux/demux_avi.c | 673 |
1 files changed, 673 insertions, 0 deletions
diff --git a/libmpdemux/demux_avi.c b/libmpdemux/demux_avi.c new file mode 100644 index 0000000000..1583371b48 --- /dev/null +++ b/libmpdemux/demux_avi.c @@ -0,0 +1,673 @@ +// AVI file parser for DEMUXER v2.9 by A'rpi/ESP-team + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include "config.h" +#include "mp_msg.h" +#include "help_mp.h" + +#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" + +#include "aviheader.h" + +// 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]; + mp_msg(MSGT_DEMUX,MSGL_V,"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]; + mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI video ID = %d\n",demux->video->id); + } + return demux->video; + } + if(id!=mmioFOURCC('J','U','N','K')){ + // unknown + mp_msg(MSGT_DEMUX,MSGL_DBG2,"Unknown chunk: %.4s (%X)\n",(char *) &id,id); + } + return NULL; +} + +static int demux_avi_read_packet(demuxer_t *demux,unsigned int id,unsigned int len,int idxpos,int flags){ + avi_priv_t *priv=demux->priv; + int skip; + float pts=0; + demux_stream_t *ds=demux_avi_select_stream(demux,id); + + mp_dbg(MSGT_DEMUX,MSGL_DBG3,"demux_avi.read_packet: %X\n",id); + + if(ds==demux->audio){ + + if(priv->pts_corrected==0){ +// printf("\rYYY-A A: %5.3f V: %5.3f \n",priv->avi_audio_pts,priv->avi_video_pts); + if(priv->pts_has_video){ + // we have video pts now + float delay=(float)priv->pts_corr_bytes/((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec; + mp_msg(MSGT_DEMUX,MSGL_V,"XXX initial v_pts=%5.3f a_pos=%d (%5.3f) \n",priv->avi_audio_pts,priv->pts_corr_bytes,delay); + //priv->pts_correction=-priv->avi_audio_pts+delay; + priv->pts_correction=delay-priv->avi_audio_pts; + priv->avi_audio_pts+=priv->pts_correction; + priv->pts_corrected=1; + } else + priv->pts_corr_bytes+=len; + } + pts=priv->avi_audio_pts; //+priv->pts_correction; + priv->avi_audio_pts=0; + } else + if(ds==demux->video){ + // video + if(priv->skip_video_frames>0){ + // drop frame (seeking) + --priv->skip_video_frames; + ds=NULL; +// } else { +// pts=priv->avi_video_pts; + } + // ezt a 2 sort lehet hogy fell kell majd cserelni: + //priv->avi_video_pts+=avi_pts_frametime; + //priv->avi_video_pts+=(float)avi_header.video.dwScale/(float)avi_header.video.dwRate; + //priv->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); + priv->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 + priv->avi_video_pts+=(float)((sh_video_t*)(demux->video->sh))->video.dwScale/(float)((sh_video_t*)(demux->video->sh))->video.dwRate; +// priv->avi_video_pts+=avi_video_ftime; +#endif +// printf("\rYYY-V A: %5.3f V: %5.3f \n",priv->avi_audio_pts,priv->avi_video_pts); + priv->avi_audio_pts=priv->avi_video_pts+priv->pts_correction; + priv->pts_has_video=1; + + pts=priv->avi_video_pts; + + //printf("read pack_no: %d pts %5.3f \n",demux->video->pack_no+demux->video->packs,pts); + + } + +// len=stream_read_dword_le(demux->stream); + skip=(len+1)&(~1); // total bytes in this chunk + + if(ds){ + mp_dbg(MSGT_DEMUX,MSGL_DBG2,"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){ + mp_dbg(MSGT_DEMUX,MSGL_DBG2,"DEMUX_AVI: Skipping %d bytes from packet %04X\n",skip,id); + stream_skip(demux->stream,skip); + } + return ds?1:0; +} + +// return value: +// 0 = EOF or no stream found +// 1 = successfully read a packet +int demux_avi_fill_buffer(demuxer_t *demux){ +avi_priv_t *priv=demux->priv; +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(priv->idx_size>0 && priv->idx_pos<priv->idx_size){ + unsigned int pos; + + //if(priv->idx_pos<0) printf("Fatal! idx_pos=%d\n",priv->idx_pos); + + idx=&((AVIINDEXENTRY *)priv->idx)[priv->idx_pos++]; + + //printf("[%d]",priv->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)){ + mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X) \n",(char *)&idx->ckid,(unsigned int)idx->ckid); + continue; // skip this chunk + } + + pos=idx->dwChunkOffset+priv->idx_offset; + if(pos<demux->movi_start || pos>=demux->movi_end){ + mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range! idx=0x%X \n",pos); + continue; + } +#if 0 + if(pos!=demux->filepos){ + mp_msg(MSGT_DEMUX,MSGL_V,"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){ + mp_msg(MSGT_DEMUX,MSGL_V,"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)){ + mp_msg(MSGT_DEMUX,MSGL_V,"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,priv->idx_pos-1,flags); +// if(!ret && priv->skip_video_frames<=0) +// if(--max_packs==0){ +// demux->stream->eof=1; +// mp_msg(MSGT_DEMUX,MSGL_ERR,MSGTR_DoesntContainSelectedStream); +// 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){ +avi_priv_t *priv=demux->priv; +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=priv->idx_pos_v++; else + if(ds==demux->audio) idx_pos=priv->idx_pos_a++; else + idx_pos=priv->idx_pos++; + + if(priv->idx_size>0 && idx_pos<priv->idx_size){ + unsigned int pos; + idx=&((AVIINDEXENTRY *)priv->idx)[idx_pos]; +// idx=&priv->idx[idx_pos]; + + if(idx->dwFlags&AVIIF_LIST){ + // LIST + continue; + } + if(ds && demux_avi_select_stream(demux,idx->ckid)!=ds){ + mp_dbg(MSGT_DEMUX,MSGL_DBG3,"Skip chunk %.4s (0x%X) \n",(char *)&idx->ckid,(unsigned int)idx->ckid); + continue; // skip this chunk + } + + pos=idx->dwChunkOffset+priv->idx_offset; + if(pos<demux->movi_start || pos>=demux->movi_end){ + mp_msg(MSGT_DEMUX,MSGL_V,"ChunkOffset out of range! current=0x%X idx=0x%X \n",demux->filepos,pos); + continue; + } +#if 0 + if(pos!=demux->filepos){ + mp_msg(MSGT_DEMUX,MSGL_V,"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){ + mp_msg(MSGT_DEMUX,MSGL_V,"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)){ + mp_msg(MSGT_DEMUX,MSGL_V,"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 && priv->skip_video_frames<=0) +// if(--max_packs==0){ +// demux->stream->eof=1; +// mp_msg(MSGT_DEMUX,MSGL_ERR,MSGTR_DoesntContainSelectedStream); +// 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){ +avi_priv_t *priv=demux->priv; +unsigned int id=0; +unsigned int len; +int ret=0; +int *fpos=NULL; + + if(ds==demux->video) fpos=&priv->idx_pos_v; else + if(ds==demux->audio) fpos=&priv->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,priv->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 int audio_id; +//extern int video_id; +extern int index_mode; // -1=untouched 0=don't use index 1=use (geneate) index +extern int force_ni; +extern int pts_from_bps; + +void read_avi_header(demuxer_t *demuxer,int index_mode); + +demuxer_t* demux_open_avi(demuxer_t* demuxer){ + demux_stream_t *d_audio=demuxer->audio; + demux_stream_t *d_video=demuxer->video; + sh_audio_t *sh_audio=NULL; + sh_video_t *sh_video=NULL; + avi_priv_t* priv=malloc(sizeof(avi_priv_t)); + + // priv struct: + priv->avi_audio_pts=priv->avi_video_pts=0.0f; + priv->pts_correction=0.0f; + priv->skip_video_frames=0; + priv->pts_corr_bytes=0; + priv->pts_has_video=priv->pts_corrected=0; + demuxer->priv=(void*)priv; + + //---- AVI header: + read_avi_header(demuxer,(demuxer->stream->type!=STREAMTYPE_STREAM)?index_mode:-2); + stream_reset(demuxer->stream); + stream_seek(demuxer->stream,demuxer->movi_start); + priv->idx_pos=0; + priv->idx_pos_a=0; + priv->idx_pos_v=0; + if(priv->idx_size>0){ + // decide index format: + if(((AVIINDEXENTRY *)priv->idx)[0].dwChunkOffset<demuxer->movi_start) + priv->idx_offset=demuxer->movi_start-4; + else + priv->idx_offset=0; + mp_msg(MSGT_DEMUX,MSGL_V,"AVI index offset: %d\n",priv->idx_offset); + } +// demuxer->endpos=avi_header.movi_end; + + if(priv->idx_size>0){ + // check that file is non-interleaved: + int i; + int a_pos=-1; + int v_pos=-1; + for(i=0;i<priv->idx_size;i++){ + AVIINDEXENTRY* idx=&((AVIINDEXENTRY *)priv->idx)[i]; + demux_stream_t* ds=demux_avi_select_stream(demuxer,idx->ckid); + int pos=idx->dwChunkOffset+priv->idx_offset; + if(a_pos==-1 && ds==demuxer->audio){ + a_pos=pos; + if(v_pos!=-1) break; + } + if(v_pos==-1 && ds==demuxer->video){ + v_pos=pos; + if(a_pos!=-1) break; + } + } + if(v_pos==-1){ + mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI_NI: " MSGTR_MissingVideoStream); + return NULL; +// GUI_MSG( mplErrorAVINI ) + } + if(a_pos==-1){ + mp_msg(MSGT_DEMUX,MSGL_INFO,"AVI_NI: " MSGTR_MissingAudioStream); + sh_audio=NULL; + } else { + if(force_ni || abs(a_pos-v_pos)>0x100000){ // distance > 1MB + mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_NI_Message,force_ni?MSGTR_NI_Forced:MSGTR_NI_Detected); + demuxer->type=DEMUXER_TYPE_AVI_NI; // HACK!!!! + pts_from_bps=1; // force BPS sync! + } + } + } else { + // no index + if(force_ni){ + mp_msg(MSGT_DEMUX,MSGL_INFO,MSGTR_UsingNINI); + demuxer->type=DEMUXER_TYPE_AVI_NINI; // HACK!!!! + priv->idx_pos_a= + priv->idx_pos_v=demuxer->movi_start; + pts_from_bps=1; // force BPS sync! + } + demuxer->seekable=0; + } + if(!ds_fill_buffer(d_video)){ + mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI: " MSGTR_MissingVideoStreamBug); + return NULL; +// GUI_MSG( mplAVIErrorMissingVideoStream ) + } + sh_video=d_video->sh;sh_video->ds=d_video; + if(d_audio->id!=-2){ + mp_msg(MSGT_DEMUX,MSGL_V,"AVI: Searching for audio stream (id:%d)\n",d_audio->id); + if(!ds_fill_buffer(d_audio)){ + mp_msg(MSGT_DEMUX,MSGL_INFO,"AVI: " MSGTR_MissingAudioStream); + sh_audio=NULL; + } else { + sh_audio=d_audio->sh;sh_audio->ds=d_audio; + sh_audio->format=sh_audio->wf->wFormatTag; + } + } + // calc. FPS: + sh_video->fps=(float)sh_video->video.dwRate/(float)sh_video->video.dwScale; + sh_video->frametime=(float)sh_video->video.dwScale/(float)sh_video->video.dwRate; + // calculating video bitrate: + sh_video->i_bps=demuxer->movi_end-demuxer->movi_start-priv->idx_size*8; + if(sh_audio) sh_video->i_bps-=sh_audio->audio.dwLength; + mp_msg(MSGT_DEMUX,MSGL_V,"AVI video length=%d\n",sh_video->i_bps); + sh_video->i_bps=((float)sh_video->i_bps/(float)sh_video->video.dwLength)*sh_video->fps; + mp_msg(MSGT_DEMUX,MSGL_INFO,"VIDEO: [%.4s] %ldx%ld %dbpp %4.2f fps %5.1f kbps (%4.1f kbyte/s)\n", + (char *)&sh_video->bih->biCompression, + sh_video->bih->biWidth, + sh_video->bih->biHeight, + sh_video->bih->biBitCount, + sh_video->fps, + sh_video->i_bps*0.008f, + sh_video->i_bps/1024.0f ); + + return demuxer; + +} + +//extern float initial_pts_delay; + +void demux_seek_avi(demuxer_t *demuxer,float rel_seek_secs,int flags){ + avi_priv_t *priv=demuxer->priv; + 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; + + if(flags&1){ + // seek absolute + video_chunk_pos=0; + } + + if(flags&2){ + // float 0..1 + int total=sh_video->video.dwLength; + if(total<=1){ + // bad video header, try to get it from audio + if(sh_audio) total=sh_video->fps*sh_audio->audio.dwLength/sh_audio->wf->nAvgBytesPerSec; + if(total<=1){ + mp_msg(MSGT_SEEK,MSGL_WARN,MSGTR_CouldntDetFNo); + total=0; + } + } + rel_seek_frames=rel_seek_secs*total; + } + + priv->skip_video_frames=0; + priv->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<priv->idx_size){ + int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid; + if(avi_stream_id(id)==d_video->id){ // video frame + if((--rel_seek_frames)<0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break; + } + ++video_chunk_pos; + } + } else { + // seek backward + while(video_chunk_pos>0){ + int id=((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].ckid; + if(avi_stream_id(id)==d_video->id){ // video frame + if((++rel_seek_frames)>0 && ((AVIINDEXENTRY *)priv->idx)[video_chunk_pos].dwFlags&AVIIF_KEYFRAME) break; + } + --video_chunk_pos; + } + } + priv->idx_pos_a=priv->idx_pos_v=priv->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 *)priv->idx)[i].ckid; + if(avi_stream_id(id)==d_video->id) ++d_video->pack_no; + } + sh_video->num_frames=sh_video->num_frames_decoded=d_video->pack_no; + priv->avi_video_pts=d_video->pack_no*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate; + d_video->pos=video_chunk_pos; + + mp_msg(MSGT_SEEK,MSGL_DBG2,"V_SEEK: pack=%d pts=%5.3f chunk=%d \n",d_video->pack_no,priv->avi_video_pts,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:priv->idx_size; + + if(sh_audio->audio.dwSampleSize){ + // constant rate audio stream +#if 0 + int align; + curr_audio_pos=(priv->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=(priv->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 *)priv->idx)[i].ckid; + if(avi_stream_id(id)==d_audio->id){ + len=((AVIINDEXENTRY *)priv->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=(priv->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<priv->idx_size && chunks>0;i++){ + int id=((AVIINDEXENTRY *)priv->idx)[i].ckid; + if(avi_stream_id(id)==d_audio->id){ + len=((AVIINDEXENTRY *)priv->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", +// priv->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 priv->skip_video_frames & adjust video pts counter: + for(i=audio_chunk_pos;i<video_chunk_pos;i++){ + int id=((AVIINDEXENTRY *)priv->idx)[i].ckid; + if(avi_stream_id(id)==d_video->id) ++priv->skip_video_frames; + } + // requires for correct audio pts calculation (demuxer): + priv->avi_video_pts-=priv->skip_video_frames*(float)sh_video->video.dwScale/(float)sh_video->video.dwRate; + priv->idx_pos_a=priv->idx_pos_v=priv->idx_pos=audio_chunk_pos; + } + } else { + // non-interleaved stream: + priv->idx_pos_a=audio_chunk_pos; + priv->idx_pos_v=video_chunk_pos; + priv->idx_pos=(audio_chunk_pos<video_chunk_pos)?audio_chunk_pos:video_chunk_pos; + } + + + + mp_msg(MSGT_SEEK,MSGL_V,"SEEK: idx=%d (a:%d v:%d) v.skip=%d a.skip=%d/%4.3f \n", + priv->idx_pos,audio_chunk_pos,video_chunk_pos, + priv->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; + + } + d_video->pts=priv->avi_video_pts; // OSD + +} + + + |