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-rw-r--r--libmpdemux/demux_avi.c673
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
+
+}
+
+
+