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#include <stdio.h>
#include <stdlib.h>
extern int verbose; // defined in mplayer.c
#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"
#define MIN(a,b) (((a)<(b))?(a):(b))
static MainAVIHeader avih;
extern void print_avih(MainAVIHeader *h);
extern void print_strh(AVIStreamHeader *h);
extern void print_wave_header(WAVEFORMATEX *h);
extern void print_index(AVIINDEXENTRY *idx,int idx_size);
void read_avi_header(demuxer_t *demuxer,int index_mode){
sh_audio_t *sh_audio=NULL;
sh_video_t *sh_video=NULL;
int stream_id=-1;
int idxfix_videostream=0;
int idxfix_divx=0;
//---- AVI header:
demuxer->idx_size=0;
while(1){
int id=stream_read_dword_le(demuxer->stream);
int chunksize,size2;
static int last_fccType=0;
//
if(stream_eof(demuxer->stream)) break;
//
if(id==mmioFOURCC('L','I','S','T')){
int len=stream_read_dword_le(demuxer->stream)-4; // list size
id=stream_read_dword_le(demuxer->stream); // list type
if(verbose>=2) printf("LIST %.4s len=%d\n",(char *) &id,len);
if(id==listtypeAVIMOVIE){
// found MOVI header
demuxer->movi_start=stream_tell(demuxer->stream);
demuxer->movi_end=demuxer->movi_start+len;
if(verbose>=1) printf("Found movie at 0x%X - 0x%X\n",demuxer->movi_start,demuxer->movi_end);
if(index_mode==-2) break; // reading from non-seekable source (stdin)
len=(len+1)&(~1);
stream_skip(demuxer->stream,len);
}
continue;
}
size2=stream_read_dword_le(demuxer->stream);
if(verbose>=2) printf("CHUNK %.4s len=%d\n",(char *) &id,size2);
chunksize=(size2+1)&(~1);
switch(id){
case ckidAVIMAINHDR: // read 'avih'
stream_read(demuxer->stream,(char*) &avih,MIN(size2,sizeof(avih)));
chunksize-=MIN(size2,sizeof(avih));
if(verbose) print_avih(&avih);
break;
case ckidSTREAMHEADER: { // read 'strh'
AVIStreamHeader h;
stream_read(demuxer->stream,(char*) &h,MIN(size2,sizeof(h)));
chunksize-=MIN(size2,sizeof(h));
++stream_id;
if(h.fccType==streamtypeVIDEO){
sh_video=new_sh_video(stream_id);
memcpy(&sh_video->video,&h,sizeof(h));
} else
if(h.fccType==streamtypeAUDIO){
sh_audio=new_sh_audio(stream_id);
memcpy(&sh_audio->audio,&h,sizeof(h));
}
last_fccType=h.fccType;
if(verbose>=1) print_strh(&h);
break; }
case ckidSTREAMFORMAT: { // read 'strf'
if(last_fccType==streamtypeVIDEO){
sh_video->bih=calloc((chunksize<sizeof(BITMAPINFOHEADER))?sizeof(BITMAPINFOHEADER):chunksize,1);
// sh_video->bih=malloc(chunksize); memset(sh_video->bih,0,chunksize);
if(verbose>=1) printf("found 'bih', %d bytes of %d\n",chunksize,sizeof(BITMAPINFOHEADER));
stream_read(demuxer->stream,(char*) sh_video->bih,chunksize);
chunksize=0;
// 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;
// if(demuxer->video->id==-1) demuxer->video->id=stream_id;
// IdxFix:
idxfix_videostream=stream_id;
switch(sh_video->bih->biCompression){
case mmioFOURCC('D', 'I', 'V', '3'):
case mmioFOURCC('d', 'i', 'v', '3'):
case mmioFOURCC('D', 'I', 'V', '4'):
case mmioFOURCC('d', 'i', 'v', '4'):
case mmioFOURCC('D', 'I', 'V', '5'):
case mmioFOURCC('d', 'i', 'v', '5'):
case mmioFOURCC('D', 'I', 'V', '6'):
case mmioFOURCC('d', 'i', 'v', '6'):
case mmioFOURCC('M', 'P', '4', '3'):
case mmioFOURCC('m', 'p', '4', '3'):
case mmioFOURCC('M', 'P', '4', '2'):
case mmioFOURCC('m', 'p', '4', '2'):
case mmioFOURCC('D', 'I', 'V', '2'):
case mmioFOURCC('A', 'P', '4', '1'):
idxfix_divx=1; // we can fix keyframes only for divx coded files!
}
} else
if(last_fccType==streamtypeAUDIO){
int wf_size = chunksize<sizeof(WAVEFORMATEX)?sizeof(WAVEFORMATEX):chunksize;
sh_audio->wf=calloc(wf_size,1);
// sh_audio->wf=malloc(chunksize); memset(sh_audio->wf,0,chunksize);
if(verbose>=1) printf("found 'wf', %d bytes of %d\n",chunksize,sizeof(WAVEFORMATEX));
stream_read(demuxer->stream,(char*) sh_audio->wf,chunksize);
if (sh_audio->wf->cbSize != 0 &&
wf_size < sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize) {
sh_audio->wf=realloc(sh_audio->wf, sizeof(WAVEFORMATEX)+sh_audio->wf->cbSize);
}
chunksize=0;
if(verbose>=1) print_wave_header(sh_audio->wf);
// if(demuxer->audio->id==-1) demuxer->audio->id=stream_id;
}
break;
}
case ckidAVINEWINDEX: if(index_mode){
demuxer->idx_size=size2>>4;
if(verbose>=1) printf("Reading INDEX block, %d chunks for %ld frames\n",
demuxer->idx_size,avih.dwTotalFrames);
demuxer->idx=malloc(demuxer->idx_size<<4);
stream_read(demuxer->stream,(char*)demuxer->idx,demuxer->idx_size<<4);
chunksize-=demuxer->idx_size<<4;
if(verbose>=2) print_index(demuxer->idx,demuxer->idx_size);
break;
}
}
if(chunksize>0) stream_skip(demuxer->stream,chunksize); else
if(chunksize<0) printf("WARNING!!! chunksize=%d (id=%.4s)\n",chunksize,(char *) &id);
}
if(index_mode>=2 || (demuxer->idx_size==0 && index_mode==1)){
// build index for file:
stream_reset(demuxer->stream);
stream_seek(demuxer->stream,demuxer->movi_start);
demuxer->idx_pos=0;
demuxer->idx=NULL;
while(1){
int id,len,skip;
AVIINDEXENTRY* idx;
unsigned char c;
demuxer->filepos=stream_tell(demuxer->stream);
if(demuxer->filepos>=demuxer->movi_end) break;
id=stream_read_dword_le(demuxer->stream);
len=stream_read_dword_le(demuxer->stream);
if(id==mmioFOURCC('L','I','S','T')){
id=stream_read_dword_le(demuxer->stream); // list type
continue;
}
if(stream_eof(demuxer->stream)) break;
if(demuxer->idx_pos<=demuxer->idx_size){
demuxer->idx_size+=32;
demuxer->idx=realloc(demuxer->idx,demuxer->idx_size*sizeof(AVIINDEXENTRY));
if(!demuxer->idx){demuxer->idx_pos=0; break;} // error!
}
idx=&((AVIINDEXENTRY *)demuxer->idx)[demuxer->idx_pos++];
idx->ckid=id;
idx->dwFlags=AVIIF_KEYFRAME; // FIXME
idx->dwChunkOffset=demuxer->filepos;
idx->dwChunkLength=len;
c=stream_read_char(demuxer->stream);
// Fix keyframes for DivX files:
if(idxfix_divx)
if(avi_stream_id(id)==idxfix_videostream){
if(c&0x40) idx->dwFlags=0;
}
if(verbose>=2) printf("%08X %08X %.4s %02X %X\n",demuxer->filepos,id,(char *) &id,c,(unsigned int) idx->dwFlags);
#if 0
{ unsigned char tmp[64];
int i;
stream_read(demuxer->stream,tmp,64);
printf("%.4s",&id);
for(i=0;i<64;i++) printf(" %02X",tmp[i]);
printf("\n");
}
#endif
skip=(len+1)&(~1); // total bytes in this chunk
stream_seek(demuxer->stream,8+demuxer->filepos+skip);
}
demuxer->idx_size=demuxer->idx_pos;
printf("AVI: Generated index table for %d chunks!\n",demuxer->idx_size);
}
}
#undef MIN
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