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mpv/demux_mov.c

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// QuickTime MOV file parser
// based on TOOLS/movinfo.c by A'rpi & Al3x
#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"
typedef struct {
unsigned int pts; // duration
unsigned int size;
off_t pos;
} mov_sample_t;
typedef struct {
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;
typedef struct {
unsigned int first;
unsigned int spc;
unsigned int sdid;
} mov_chunkmap_t;
typedef struct {
unsigned int num;
unsigned int dur;
} mov_durmap_t;
typedef struct {
int id;
int type;
int pos;
//
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
unsigned char* stdata;
int samples_size;
mov_sample_t* samples;
int chunks_size;
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:
i=trak->chunkmap_size;
while(i>0){
--i;
for(j=trak->chunkmap[i].first;j<last;j++){
trak->chunks[j].desc=trak->chunkmap[i].sdid;
trak->chunks[j].size=trak->chunkmap[i].spc;
}
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;
for(j=0;j<trak->chunks_size;j++){
off_t pos=trak->chunks[j].pos;
for(i=0;i<trak->chunks[j].size;i++){
trak->samples[s].pos=pos;
#if 0
printf("Sample %5d: pts=%8d off=0x%08X size=%d\n",s,
trak->samples[s].pts,
(int)trak->samples[s].pos,
trak->samples[s].size);
#endif
pos+=trak->samples[s].size;
++s;
}
}
}
#define MOV_MAX_TRACKS 256
#define MOV_TRAK_UNKNOWN 0
#define MOV_TRAK_VIDEO 1
#define MOV_TRAK_AUDIO 2
typedef struct {
off_t moov_start;
off_t moov_end;
off_t mdat_start;
off_t mdat_end;
int track_db;
mov_track_t* tracks[MOV_MAX_TRACKS];
} mov_priv_t;
#define MOV_FOURCC(a,b,c,d) ((a<<24)|(b<<16)|(c<<8)|(d))
int mov_check_file(demuxer_t* demuxer){
int flags=0;
mov_priv_t* priv=malloc(sizeof(mov_priv_t));
mp_msg(MSGT_DEMUX,MSGL_V,"Checking for MOV\n");
memset(priv,0,sizeof(mov_priv_t));
demuxer->priv=priv;
while(1){
off_t len=stream_read_dword(demuxer->stream);
unsigned int id=stream_read_dword(demuxer->stream);
if(stream_eof(demuxer->stream)) break; // EOF
if(len<8) break; // invalid chunk
switch(id){
case MOV_FOURCC('m','o','o','v'):
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie header found!\n");
priv->moov_start=stream_tell(demuxer->stream);
priv->moov_end=priv->moov_start+len-8;
flags|=1;
break;
case MOV_FOURCC('m','d','a','t'):
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Movie DATA found!\n");
priv->mdat_start=stream_tell(demuxer->stream);
priv->mdat_end=priv->mdat_start+len-8;
flags|=2;
break;
default:
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: unknown chunk: %.4s %d\n",&id,(int)len);
}
if(!stream_skip(demuxer->stream,len-8)) break;
}
return (flags==3);
}
static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak){
mov_priv_t* priv=demuxer->priv;
while(1){
off_t pos;
off_t len;
unsigned int id;
//
pos=stream_tell(demuxer->stream);
if(pos>=endpos) return; // END
len=stream_read_dword(demuxer->stream);
if(len<8) return; // error
len-=8;
id=stream_read_dword(demuxer->stream);
//
mp_msg(MSGT_DEMUX,MSGL_DBG2,"lschunks %.4s %d\n",&id,(int)len);
//
if(trak){
switch(id){
case MOV_FOURCC('t','k','h','d'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sTrack header!\n",level,"");
// 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'): {
unsigned int tmp;
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sMedia header!\n",level,"");
#if 0
tmp=stream_read_dword(demuxer->stream);
printf("dword1: 0x%08X (%d)\n",tmp,tmp);
tmp=stream_read_dword(demuxer->stream);
printf("dword2: 0x%08X (%d)\n",tmp,tmp);
tmp=stream_read_dword(demuxer->stream);
printf("dword3: 0x%08X (%d)\n",tmp,tmp);
tmp=stream_read_dword(demuxer->stream);
printf("dword4: 0x%08X (%d)\n",tmp,tmp);
tmp=stream_read_dword(demuxer->stream);
printf("dword5: 0x%08X (%d)\n",tmp,tmp);
tmp=stream_read_dword(demuxer->stream);
printf("dword6: 0x%08X (%d)\n",tmp,tmp);
#endif
stream_skip(demuxer->stream,12);
// read timescale
trak->timescale=stream_read_dword(demuxer->stream);
// read length
trak->length=stream_read_dword(demuxer->stream);
break;
}
case MOV_FOURCC('v','m','h','d'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sVideo header!\n",level,"");
trak->type=MOV_TRAK_VIDEO;
// read video data
break;
}
case MOV_FOURCC('s','m','h','d'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSound header!\n",level,"");
trak->type=MOV_TRAK_AUDIO;
// read audio data
break;
}
case MOV_FOURCC('s','t','s','d'): {
int i=stream_read_dword(demuxer->stream); // temp!
int count=stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sDescription list! (cnt:%d)\n",level,"",count);
for(i=0;i<count;i++){
off_t pos=stream_tell(demuxer->stream);
off_t len=stream_read_dword(demuxer->stream);
unsigned int fourcc=stream_read_dword_le(demuxer->stream);
if(len<8) break; // error
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*s desc #%d: %.4s",level,"",i,&fourcc);
if(!i){
trak->fourcc=fourcc;
// read codec data
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");
if(fourcc!=trak->fourcc && i)
mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_MOVvariableFourCC);
if(!stream_seek(demuxer->stream,pos+len)) break;
}
break;
}
case MOV_FOURCC('s','t','t','s'): {
int temp=stream_read_dword(demuxer->stream);
int len=stream_read_dword(demuxer->stream);
int i;
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++){
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;
}
case MOV_FOURCC('s','t','s','c'): {
int temp=stream_read_dword(demuxer->stream);
int len=stream_read_dword(demuxer->stream);
int i;
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample->Chunk mapping table! (%d blocks)\n",level,"",len);
// read data:
trak->chunkmap_size=len;
trak->chunkmap=malloc(sizeof(mov_chunkmap_t)*len);
for(i=0;i<len;i++){
trak->chunkmap[i].first=stream_read_dword(demuxer->stream)-1;
trak->chunkmap[i].spc=stream_read_dword(demuxer->stream);
trak->chunkmap[i].sdid=stream_read_dword(demuxer->stream);
}
break;
}
case MOV_FOURCC('s','t','s','z'): {
int temp=stream_read_dword(demuxer->stream);
int ss=stream_read_dword(demuxer->stream);
int len=stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample size table! len=%d ss=%d\n",level,"",len,ss);
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=stream_read_dword(demuxer->stream);
}
break;
}
case MOV_FOURCC('s','t','c','o'): {
int temp=stream_read_dword(demuxer->stream);
int len=stream_read_dword(demuxer->stream);
int i;
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sChunk offset table! (%d chunks)\n",level,"",len);
// extend array if needed:
if(len>trak->chunks_size){
trak->chunks=realloc(trak->chunks,sizeof(mov_chunk_t)*len);
trak->chunks_size=len;
}
// read elements:
for(i=0;i<len;i++) trak->chunks[i].pos=stream_read_dword(demuxer->stream);
break;
}
case MOV_FOURCC('m','d','i','a'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sMedia stream!\n",level,"");
lschunks(demuxer,level+1,pos+len,trak);
break;
}
case MOV_FOURCC('m','i','n','f'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sMedia info!\n",level,"");
lschunks(demuxer,level+1,pos+len,trak);
break;
}
case MOV_FOURCC('s','t','b','l'): {
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: %*sSample info!\n",level,"");
lschunks(demuxer,level+1,pos+len,trak);
break;
}
}//switch(id)
} else
if(id==MOV_FOURCC('t','r','a','k')){
// if(trak) printf("MOV: Warning! trak in trak?\n");
if(priv->track_db>=MOV_MAX_TRACKS){
mp_msg(MSGT_DEMUX,MSGL_WARN,MSGTR_MOVtooManyTrk);
return;
}
trak=malloc(sizeof(mov_track_t));
memset(trak,0,sizeof(mov_track_t));
mp_msg(MSGT_DEMUX,MSGL_V,"MOV: Track #%d:\n",priv->track_db);
trak->id=priv->track_db;
priv->tracks[priv->track_db]=trak;
lschunks(demuxer,level+1,pos+len,trak);
mov_build_index(trak);
switch(trak->type){
case MOV_TRAK_AUDIO: {
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));
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: {
sh_video_t* sh=new_sh_video(demuxer,priv->track_db);
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);
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;
demuxer->video->sh=sh; sh->ds=demuxer->video;
}
break;
}
}
printf("--------------\n");
priv->track_db++;
trak=NULL;
} else
if(id==MOV_FOURCC('c','m','o','v')){
mp_msg(MSGT_DEMUX,MSGL_ERR,MSGTR_MOVcomprhdr);
return;
}
pos+=len+8;
if(pos>=endpos) break;
if(!stream_seek(demuxer->stream,pos)) break;
}
}
int mov_read_header(demuxer_t* demuxer){
mov_priv_t* priv=demuxer->priv;
printf("mov_read_header!\n");
// Parse header:
stream_reset(demuxer->stream);
if(!stream_seek(demuxer->stream,priv->moov_start)) return 0; // ???
lschunks(demuxer, 0, priv->moov_end, NULL);
// Build tables:
// ...
mp_msg(MSGT_DEMUX,MSGL_ERR,MSGTR_MOVnotyetsupp);
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];
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;
}
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