// Select ds from ID
static demux_stream_t *demux_avi_select_stream(demuxer_t *demux,
unsigned int id)
{
int stream_id=avi_stream_id(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){
sh_audio_t* sh;
avi_priv_t *priv=demux->priv;
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);
if(sh->wf){
priv->audio_block_size=sh->wf->nBlockAlign;
if(!priv->audio_block_size){
// for PCM audio we can calculate the blocksize:
if(sh->format==1)
priv->audio_block_size=sh->wf->nChannels*(sh->wf->wBitsPerSample/8);
else
priv->audio_block_size=1; // hope the best...
} else {
// workaround old mencoder's bug:
if(sh->audio.dwSampleSize==1 && sh->audio.dwScale==1 &&
(sh->wf->nBlockAlign==1152 || sh->wf->nBlockAlign==576)){
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: Working around CBR-MP3 nBlockAlign header bug!\n");
priv->audio_block_size=1;
}
}
} else {
priv->audio_block_size=sh->audio.dwSampleSize;
}
}
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);
//abort();
}
return NULL;
}
static uint32_t avi_find_id(stream_t *stream) {
uint32_t id = stream_read_dword_le(stream);
if (!id) {
mp_msg(MSGT_DEMUX, MSGL_WARN, "Incomplete stream? Trying resync.\n");
do {
id = stream_read_dword_le(stream);
if (stream_eof(stream)) return 0;
} while (avi_stream_id(id) > 99);
}
return id;
}
void print_index(AVIINDEXENTRY *idx, int idx_size, int verbose_level){
int i;
unsigned int pos[256];
unsigned int num[256];
for(i=0;i<256;i++) num[i]=pos[i]=0;
for(i=0;i<idx_size;i++){
int id=avi_stream_id(idx[i].ckid);
if(id<0 || id>255) id=255;
mp_msg(MSGT_HEADER, verbose_level, "%5d: %.4s %4X %016llX len:%6ld pos:%7d->%7.3f %7d->%7.3f\n",i,
(char *)&idx[i].ckid,
(unsigned int)idx[i].dwFlags&0xffff,
(uint64_t)AVI_IDX_OFFSET(&idx[i]),
// idx[i].dwChunkOffset+demuxer->movi_start,
idx[i].dwChunkLength,
pos[id],(float)pos[id]/18747.0f,
num[id],(float)num[id]/23.976f
);
pos[id]+=idx[i].dwChunkLength;
++num[id];
}
}
// Select ds from ID
static demux_stream_t *demux_avi_select_stream(demuxer_t *demux,
unsigned int id)
{
int stream_id=avi_stream_id(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);
update_audio_block_size(demux);
}
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);
//abort();
}
return NULL;
}
static void demux_seek_avi(demuxer_t *demuxer, float rel_seek_secs,
float audio_delay, 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&SEEK_ABSOLUTE){
// seek absolute
video_chunk_pos=0;
}
if(flags&SEEK_FACTOR){
rel_seek_frames=rel_seek_secs*priv->numberofframes;
}
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-1){
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;
}
priv->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;
priv->audio_block_no=0;
d_audio->dpos=0;
if(sh_audio){
int i;
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
/* immediate seeking to audio position, including when streams are delayed */
curr_audio_pos=(priv->avi_video_pts + audio_delay)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
curr_audio_pos*=sh_audio->audio.dwSampleSize;
// 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;
if(d_audio->dpos<=curr_audio_pos && curr_audio_pos<(d_audio->dpos+len)){
break;
}
++d_audio->pack_no;
priv->audio_block_no+=priv->audio_block_size ?
((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
d_audio->dpos+=len;
}
}
audio_chunk_pos=i;
skip_audio_bytes=curr_audio_pos-d_audio->dpos;
mp_msg(MSGT_SEEK,MSGL_V,"SEEK: i=%d (max:%d) dpos=%d (wanted:%d) \n",
i,chunk_max,(int)d_audio->dpos,curr_audio_pos);
} else {
// VBR audio
/* immediate seeking to audio position, including when streams are delayed */
int chunks=(priv->avi_video_pts + audio_delay)*(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;
priv->audio_block_no+=priv->audio_block_size ?
((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
d_audio->dpos+=len;
audio_chunk_pos=i;
}
if(priv->audio_block_size)
chunks-=(len+priv->audio_block_size-1)/priv->audio_block_size;
}
}
}
// 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;
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->avi_audio_pts=priv->avi_video_pts;
// set index position:
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",
(int)priv->idx_pos,audio_chunk_pos,video_chunk_pos,
(int)priv->skip_video_frames,skip_audio_bytes,skip_audio_secs);
if(skip_audio_bytes){
demux_read_data(d_audio,NULL,skip_audio_bytes);
}
}
d_video->pts=priv->avi_video_pts; // OSD
}
static 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=calloc(1, sizeof(avi_priv_t));
demuxer->priv=(void*)priv;
//---- AVI header:
read_avi_header(demuxer,(demuxer->stream->flags & MP_STREAM_SEEK_BW)?index_mode:-2);
if(demuxer->audio->id>=0 && !demuxer->a_streams[demuxer->audio->id]){
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: invalid audio stream ID: %d - ignoring (nosound)\n",demuxer->audio->id);
demuxer->audio->id=-2; // disabled
}
if(demuxer->video->id>=0 && !demuxer->v_streams[demuxer->video->id]){
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: invalid video stream ID: %d - ignoring (using default)\n",demuxer->video->id);
demuxer->video->id=-1; // autodetect
}
stream_reset(demuxer->stream);
stream_seek(demuxer->stream,demuxer->movi_start);
if(priv->idx_size>1){
// decide index format:
#if 1
if((AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start ||
AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[1])<demuxer->movi_start )&& !priv->isodml)
priv->idx_offset=demuxer->movi_start-4;
#else
if(AVI_IDX_OFFSET(&((AVIINDEXENTRY *)priv->idx)[0])<demuxer->movi_start)
priv->idx_offset=demuxer->movi_start-4;
#endif
mp_msg(MSGT_DEMUX,MSGL_V,"AVI index offset: 0x%X (movi=0x%X idx0=0x%X idx1=0x%X)\n",
(int)priv->idx_offset,(int)demuxer->movi_start,
(int)((AVIINDEXENTRY *)priv->idx)[0].dwChunkOffset,
(int)((AVIINDEXENTRY *)priv->idx)[1].dwChunkOffset);
}
if(priv->idx_size>0){
// check that file is non-interleaved:
int i;
off_t a_pos=-1;
off_t 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);
off_t pos = priv->idx_offset + AVI_IDX_OFFSET(idx);
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: %s",
mp_gtext("No video stream found.\n"));
return NULL;
}
if(a_pos==-1){
d_audio->sh=sh_audio=NULL;
} else {
if(force_ni || abs(a_pos-v_pos)>0x100000){ // distance > 1MB
mp_tmsg(MSGT_DEMUX,MSGL_INFO,"%s NON-INTERLEAVED AVI file format.\n",force_ni?"Forced":"Detected");
demuxer->type=DEMUXER_TYPE_AVI_NI; // HACK!!!!
demuxer->desc=&demuxer_desc_avi_ni; // HACK!!!!
pts_from_bps=1; // force BPS sync!
}
}
} else {
// no index
if(force_ni){
mp_tmsg(MSGT_DEMUX,MSGL_INFO,"Using NON-INTERLEAVED broken AVI file format.\n");
demuxer->type=DEMUXER_TYPE_AVI_NINI; // HACK!!!!
demuxer->desc=&demuxer_desc_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: %s",
mp_gtext("Missing video stream!? Contact the author, "
"it may be a bug :(\n"));
return NULL;
}
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(!priv->audio_streams || !ds_fill_buffer(d_audio)){
mp_msg(MSGT_DEMUX, MSGL_INFO, "AVI: %s",
mp_gtext("No audio stream found -> no sound.\n"));
d_audio->sh=sh_audio=NULL;
} else {
sh_audio=d_audio->sh;sh_audio->ds=d_audio;
}
}
// calculating audio/video bitrate:
if(priv->idx_size>0){
// we have index, let's count 'em!
AVIINDEXENTRY *idx = priv->idx;
int64_t vsize=0;
int64_t asize=0;
size_t vsamples=0;
size_t asamples=0;
int i;
for(i=0;i<priv->idx_size;i++){
int id=avi_stream_id(idx[i].ckid);
unsigned len=idx[i].dwChunkLength;
if(sh_video->ds->id == id) {
vsize+=len;
++vsamples;
}
else if(sh_audio && sh_audio->ds->id == id) {
asize+=len;
asamples+=(len+priv->audio_block_size-1)/priv->audio_block_size;
}
}
mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u) audio size=%"PRId64" (%u)\n",vsize,vsamples,asize,asamples);
priv->numberofframes=vsamples;
sh_video->i_bps=((float)vsize/(float)vsamples)*(float)sh_video->video.dwRate/(float)sh_video->video.dwScale;
if(sh_audio) sh_audio->i_bps=((float)asize/(float)asamples)*(float)sh_audio->audio.dwRate/(float)sh_audio->audio.dwScale;
} else {
// guessing, results may be inaccurate:
int64_t vsize;
int64_t asize=0;
if((priv->numberofframes=sh_video->video.dwLength)<=1)
// bad video header, try to get number of frames from audio
if(sh_audio && sh_audio->wf->nAvgBytesPerSec) priv->numberofframes=sh_video->fps*sh_audio->audio.dwLength/sh_audio->audio.dwRate*sh_audio->audio.dwScale;
if(priv->numberofframes<=1){
mp_tmsg(MSGT_SEEK,MSGL_WARN,"Could not determine number of frames (for absolute seek).\n");
priv->numberofframes=0;
}
if(sh_audio){
if(sh_audio->wf->nAvgBytesPerSec && sh_audio->audio.dwSampleSize!=1){
asize=(float)sh_audio->wf->nAvgBytesPerSec*sh_audio->audio.dwLength*sh_audio->audio.dwScale/sh_audio->audio.dwRate;
} else {
asize=sh_audio->audio.dwLength;
sh_audio->i_bps=(float)asize/(sh_video->frametime*priv->numberofframes);
}
}
vsize=demuxer->movi_end-demuxer->movi_start-asize-8*priv->numberofframes;
mp_msg(MSGT_DEMUX,MSGL_V,"AVI video size=%"PRId64" (%u) audio size=%"PRId64"\n",vsize,priv->numberofframes,asize);
sh_video->i_bps=(float)vsize/(sh_video->frametime*priv->numberofframes);
}
return demuxer;
}
static int demux_avi_read_packet(demuxer_t *demux,demux_stream_t *ds,unsigned int id,unsigned int len,int idxpos,int flags){
avi_priv_t *priv=demux->priv;
int skip;
float pts=0;
mp_dbg(MSGT_DEMUX,MSGL_DBG3,"demux_avi.read_packet: %X\n",id);
if(ds==demux->audio){
if(priv->pts_corrected==0){
if(priv->pts_has_video){
// we have video pts now
float delay=0;
if(((sh_audio_t*)(ds->sh))->wf->nAvgBytesPerSec)
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;
}
if(pts_from_bps){
pts = priv->audio_block_no *
(float)((sh_audio_t*)demux->audio->sh)->audio.dwScale /
(float)((sh_audio_t*)demux->audio->sh)->audio.dwRate;
} else
pts=priv->avi_audio_pts; //+priv->pts_correction;
priv->avi_audio_pts=0;
// update blockcount:
priv->audio_block_no+=priv->audio_block_size ?
((len+priv->audio_block_size-1)/priv->audio_block_size) : 1;
} else
if(ds==demux->video){
// video
if(priv->skip_video_frames>0){
// drop frame (seeking)
--priv->skip_video_frames;
ds=NULL;
}
pts = priv->avi_video_pts = priv->video_pack_no *
(float)((sh_video_t*)demux->video->sh)->video.dwScale /
(float)((sh_video_t*)demux->video->sh)->video.dwRate;
priv->avi_audio_pts=priv->avi_video_pts+priv->pts_correction;
priv->pts_has_video=1;
if(ds) ++priv->video_pack_no;
}
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;
}
skip = FFMAX(skip, 0);
if (avi_stream_id(id) > 99 && id != mmioFOURCC('J','U','N','K'))
skip = FFMIN(skip, 65536);
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;
}