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optimized demuxer for fixed samplesize (raw audio)

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2116 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi 2001-10-07 00:22:43 +00:00
parent 3a55d08b34
commit c39912c759
1 changed files with 62 additions and 24 deletions
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86
demux_mov.c
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@ -26,8 +26,9 @@ typedef struct {
} mov_sample_t;
typedef struct {
unsigned int size; // samples/chunk
int desc; // for multiple codecs mode - not used
unsigned int sample; // number of the first sample in teh chunk
unsigned int size; // number of samples in the chunk
int desc; // for multiple codecs mode - not used
off_t pos;
} mov_chunk_t;
@ -37,6 +38,11 @@ typedef struct {
unsigned int sdid;
} mov_chunkmap_t;
typedef struct {
unsigned int num;
unsigned int dur;
} mov_durmap_t;
typedef struct {
int id;
int type;
@ -44,8 +50,11 @@ typedef struct {
//
int timescale;
unsigned int length;
int samplesize; // 0 = variable
int duration; // 0 = variable
int width,height; // for video
unsigned int fourcc;
//
int tkdata_len; // track data
unsigned char* tkdata;
int stdata_len; // stream data
@ -56,11 +65,14 @@ typedef struct {
mov_chunk_t* chunks;
int chunkmap_size;
mov_chunkmap_t* chunkmap;
int durmap_size;
mov_durmap_t* durmap;
} mov_track_t;
void mov_build_index(mov_track_t* trak){
int i,j,s;
int last=trak->chunks_size;
unsigned int pts=0;
printf("MOV track: %d chunks, %d samples\n",trak->chunks_size,trak->samples_size);
printf("pts=%d scale=%d time=%5.3f\n",trak->length,trak->timescale,(float)trak->length/(float)trak->timescale);
// process chunkmap:
@ -73,6 +85,30 @@ void mov_build_index(mov_track_t* trak){
}
last=trak->chunkmap[i].first;
}
// calc pts of chunks:
s=0;
for(j=0;j<trak->chunks_size;j++){
trak->chunks[j].sample=s;
s+=trak->chunks[j].size;
}
if(!trak->samples_size){
// constant sampesize
if(trak->durmap_size==1 || (trak->durmap_size==2 && trak->durmap[1].num==1)){
} else printf("*** constant samplesize & variable duration not yet supported! ***\nContact the author if you have such sample file!\n");
return;
}
// calc pts:
s=0;
for(j=0;j<trak->durmap_size;j++){
for(i=0;i<trak->durmap[j].num;i++){
trak->samples[s].pts=pts;
++s;
pts+=trak->durmap[j].dur;
}
}
// calc sample offsets
s=0;
@ -242,22 +278,13 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
int x=0;
unsigned int pts=0;
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample duration table! (%d blocks)\n",level,"",len);
trak->durmap=malloc(sizeof(mov_durmap_t)*len);
memset(trak->durmap,0,sizeof(mov_durmap_t)*len);
trak->durmap_size=len;
for(i=0;i<len;i++){
unsigned int num=stream_read_dword(demuxer->stream);
unsigned int dur=stream_read_dword(demuxer->stream);
printf("num=%d dur=%d [%d] (%d)\n",num,dur,trak->samples_size,x);
num+=x;
// extend array if needed:
if(num>trak->samples_size){
trak->samples=realloc(trak->samples,sizeof(mov_sample_t)*num);
trak->samples_size=num;
}
// fill array:
while(x<num){
trak->samples[x].pts=pts;
pts+=dur;
++x;
}
trak->durmap[i].num=stream_read_dword(demuxer->stream);
trak->durmap[i].dur=stream_read_dword(demuxer->stream);
pts+=trak->durmap[i].num*trak->durmap[i].dur;
}
if(trak->length!=pts) printf("Warning! pts=%d length=%d\n",pts,trak->length);
break;
@ -281,15 +308,15 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
int temp=stream_read_dword(demuxer->stream);
int ss=stream_read_dword(demuxer->stream);
int len=stream_read_dword(demuxer->stream);
int i;
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample size table! len=%d ss=%d\n",level,"",len,ss);
// extend array if needed:
if(len>trak->samples_size){
trak->samplesize=ss;
if(!ss){
// variable samplesize
int i;
trak->samples=realloc(trak->samples,sizeof(mov_sample_t)*len);
trak->samples_size=len;
}
for(i=0;i<len;i++){
trak->samples[i].size=ss?ss:stream_read_dword(demuxer->stream);
for(i=0;i<len;i++)
trak->samples[i].size=stream_read_dword(demuxer->stream);
}
break;
}
@ -342,6 +369,7 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
sh_audio_t* sh=new_sh_audio(demuxer,priv->track_db);
sh->format=trak->fourcc;
printf("!!! audio bits: %d chans: %d\n",trak->stdata[19],trak->stdata[17]);
printf("Fourcc: %.4s\n",&trak->fourcc);
// Emulate WAVEFORMATEX struct:
sh->wf=malloc(sizeof(WAVEFORMATEX));
memset(sh->wf,0,sizeof(WAVEFORMATEX));
@ -377,6 +405,8 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
sh->bih->biSizeImage=sh->bih->biWidth*sh->bih->biHeight;
printf("Image size: %d x %d\n",sh->disp_w,sh->disp_h);
printf("Fourcc: %.4s Codec: '%.*s'\n",&trak->fourcc,trak->stdata_len-43,trak->stdata+43);
if(demuxer->video->id==-1 || demuxer->video->id==priv->track_db){
// (auto)selected video track:
demuxer->video->id=priv->track_db;
@ -429,13 +459,21 @@ int demux_mov_fill_buffer(demuxer_t *demuxer,demux_stream_t* ds){
if(ds->id<0 || ds->id>=priv->track_db) return 0;
trak=priv->tracks[ds->id];
if(trak->samplesize){
// read chunk:
if(trak->pos>=trak->chunks_size) return 0; // EOF
stream_seek(demuxer->stream,trak->chunks[trak->pos].pos);
pts=(float)(trak->chunks[trak->pos].sample*trak->duration)/(float)trak->timescale;
ds_read_packet(ds,demuxer->stream,trak->chunks[trak->pos].size*trak->samplesize,pts,trak->chunks[trak->pos].pos,0);
} else {
// read sample:
if(trak->pos>=trak->samples_size) return 0; // EOF
stream_seek(demuxer->stream,trak->samples[trak->pos].pos);
pts=(float)trak->samples[trak->pos].pts/(float)trak->timescale;
ds_read_packet(ds,demuxer->stream,trak->samples[trak->pos].size,pts,trak->samples[trak->pos].pos,0);
}
++trak->pos;
return 1;
}