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implemented simple demuxer

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2102 b3059339-0415-0410-9bf9-f77b7e298cf2
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arpi 2001-10-06 00:58:23 +00:00
parent 80180c53eb
commit 602c2c7a69
1 changed files with 71 additions and 9 deletions
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80
demux_mov.c
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@ -40,12 +40,16 @@ typedef struct {
typedef struct {
int id;
int type;
int pos;
//
int timescale;
unsigned int length;
int width,height; // for video
unsigned int fourcc;
int data_len;
unsigned char* data;
int tkdata_len; // track data
unsigned char* tkdata;
int stdata_len; // stream data
unsigned char* stdata;
int samples_size;
mov_sample_t* samples;
int chunks_size;
@ -162,7 +166,10 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
switch(id){
case MOV_FOURCC('t','k','h','d'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sTrack header!\n",level,"");
// read width x height
// read codec data
trak->tkdata_len=len;
trak->tkdata=malloc(trak->tkdata_len);
stream_read(demuxer->stream,trak->tkdata,trak->tkdata_len);
break;
}
case MOV_FOURCC('m','d','h','d'): {
@ -214,11 +221,11 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
if(!i){
trak->fourcc=fourcc;
// read codec data
trak->data_len=len-8;
trak->data=malloc(trak->data_len);
stream_read(demuxer->stream,trak->data,trak->data_len);
if(trak->type==MOV_TRAK_VIDEO && trak->data_len>43){
mp_msg(MSGT_DEMUX,MSGL_V," '%.*s'",trak->data_len-43,trak->data+43);
trak->stdata_len=len-8;
trak->stdata=malloc(trak->stdata_len);
stream_read(demuxer->stream,trak->stdata,trak->stdata_len);
if(trak->type==MOV_TRAK_VIDEO && trak->stdata_len>43){
mp_msg(MSGT_DEMUX,MSGL_V," '%.*s'",trak->stdata_len-43,trak->stdata+43);
}
}
mp_msg(MSGT_DEMUX,MSGL_V,"\n");
@ -334,7 +341,20 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
case MOV_TRAK_AUDIO: {
sh_audio_t* sh=new_sh_audio(demuxer,priv->track_db);
sh->format=trak->fourcc;
sh->samplerate=trak->timescale;
printf("!!! audio bits: %d chans: %d\n",trak->stdata[19],trak->stdata[17]);
// Emulate WAVEFORMATEX struct:
sh->wf=malloc(sizeof(WAVEFORMATEX));
memset(sh->wf,0,sizeof(WAVEFORMATEX));
sh->wf->nChannels=trak->stdata[17];
sh->wf->wBitsPerSample=trak->stdata[19];
sh->wf->nSamplesPerSec=trak->timescale;
sh->wf->nAvgBytesPerSec=sh->wf->nChannels*((sh->wf->wBitsPerSample+7)/8)*sh->wf->nSamplesPerSec;
// Selection:
if(demuxer->audio->id==-1 || demuxer->audio->id==priv->track_db){
// (auto)selected audio track:
demuxer->audio->id=priv->track_db;
demuxer->audio->sh=sh; sh->ds=demuxer->audio;
}
break;
}
case MOV_TRAK_VIDEO: {
@ -342,6 +362,26 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
sh->format=trak->fourcc;
sh->fps=trak->timescale;
sh->frametime=1.0f/sh->fps;
sh->disp_w=trak->tkdata[77]|(trak->tkdata[76]<<8);
sh->disp_h=trak->tkdata[81]|(trak->tkdata[80]<<8);
// emulate BITMAPINFOHEADER:
sh->bih=malloc(sizeof(BITMAPINFOHEADER));
memset(sh->bih,0,sizeof(BITMAPINFOHEADER));
sh->bih->biSize=40;
sh->bih->biWidth=sh->disp_w;
sh->bih->biHeight=sh->disp_h;
sh->bih->biPlanes=0;
sh->bih->biBitCount=16;
sh->bih->biCompression=trak->fourcc;
sh->bih->biSizeImage=sh->bih->biWidth*sh->bih->biHeight;
printf("Image size: %d x %d\n",sh->disp_w,sh->disp_h);
if(demuxer->video->id==-1 || demuxer->video->id==priv->track_db){
// (auto)selected video track:
demuxer->video->id=priv->track_db;
demuxer->video->sh=sh; sh->ds=demuxer->video;
}
break;
}
}
@ -377,3 +417,25 @@ int mov_read_header(demuxer_t* demuxer){
return 1;
}
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_mov_fill_buffer(demuxer_t *demuxer,demux_stream_t* ds){
mov_priv_t* priv=demuxer->priv;
mov_track_t* trak=NULL;
float pts;
if(ds->id<0 || ds->id>=priv->track_db) return 0;
trak=priv->tracks[ds->id];
// 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;
}