mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
d34041569e
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2 b3059339-0415-0410-9bf9-f77b7e298cf2
162 lines
4.0 KiB
C
162 lines
4.0 KiB
C
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void write_avi_chunk(FILE *f,unsigned int id,int len,void* data){
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fwrite(&id,4,1,f);
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fwrite(&len,4,1,f);
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if(len>0){
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if(data){
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// DATA
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fwrite(data,len,1,f);
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if(len&1){ // padding
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unsigned char zerobyte=0;
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fwrite(&zerobyte,1,1,f);
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}
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} else {
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// JUNK
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char *avi_junk_data="[= MPlayer junk data! =]";
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if(len&1) ++len; // padding
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while(len>0){
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int l=strlen(avi_junk_data);
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if(l>len) l=len;
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fwrite(avi_junk_data,l,1,f);
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len-=l;
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}
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}
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}
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}
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void write_avi_list(FILE *f,unsigned int id,int len){
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unsigned int list_id=FOURCC_LIST;
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len+=4; // list fix
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fwrite(&list_id,4,1,f);
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fwrite(&len,4,1,f);
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fwrite(&id,4,1,f);
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}
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struct {
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MainAVIHeader avih;
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AVIStreamHeader video;
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BITMAPINFOHEADER bih;
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unsigned int movi_start;
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unsigned int movi_end;
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unsigned int file_end;
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} wah;
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void write_avi_header(FILE *f){
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unsigned int riff[3];
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// RIFF header:
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riff[0]=mmioFOURCC('R','I','F','F');
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riff[1]=wah.file_end; // filesize
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riff[2]=formtypeAVI; // 'AVI '
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fwrite(&riff,12,1,f);
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// AVI header:
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write_avi_list(f,listtypeAVIHEADER,sizeof(wah.avih)+8+12+sizeof(wah.video)+8+sizeof(wah.bih)+8);
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write_avi_chunk(f,ckidAVIMAINHDR,sizeof(wah.avih),&wah.avih);
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// stream header:
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write_avi_list(f,listtypeSTREAMHEADER,sizeof(wah.video)+8+sizeof(wah.bih)+8);
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write_avi_chunk(f,ckidSTREAMHEADER,sizeof(wah.video),&wah.video);
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write_avi_chunk(f,ckidSTREAMFORMAT,sizeof(wah.bih),&wah.bih);
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// JUNK:
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write_avi_chunk(f,ckidAVIPADDING,2048-(ftell(f)&2047)-8,NULL);
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// 'movi' header:
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write_avi_list(f,listtypeAVIMOVIE,wah.movi_end-ftell(f)-12);
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wah.movi_start=ftell(f);
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}
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// called _before_ encoding: (write placeholders and video info)
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void write_avi_header_1(FILE *f,int fcc,float fps,int width,int height){
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int frames=8*3600*fps; // 8 hours
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wah.file_end=
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wah.movi_end=0x7f000000;
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wah.avih.dwMicroSecPerFrame=1000000.0f/fps;
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wah.avih.dwMaxBytesPerSec=fps*500000; // ?????
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wah.avih.dwPaddingGranularity=1; // padding
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wah.avih.dwFlags=AVIF_ISINTERLEAVED;
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wah.avih.dwTotalFrames=frames;
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wah.avih.dwInitialFrames=0;
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wah.avih.dwStreams=1;
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wah.avih.dwSuggestedBufferSize=0x10000; // 1MB
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wah.avih.dwWidth=width;
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wah.avih.dwHeight=height;
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wah.avih.dwReserved[0]=
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wah.avih.dwReserved[1]=
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wah.avih.dwReserved[2]=
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wah.avih.dwReserved[3]=0;
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wah.video.fccType=streamtypeVIDEO;
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wah.video.fccHandler=fcc;
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wah.video.dwFlags=0;
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wah.video.wPriority=0;
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wah.video.wLanguage=0;
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wah.video.dwInitialFrames=0;
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wah.video.dwScale=10000;
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wah.video.dwRate=fps*10000;
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wah.video.dwStart=0;
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wah.video.dwLength=frames;
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wah.video.dwSuggestedBufferSize=0x100000; // 1MB ????
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wah.video.dwQuality=10000;
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wah.video.dwSampleSize=width*height*3;
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wah.bih.biSize=sizeof(wah.bih); // 40 ?
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wah.bih.biWidth=width;
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wah.bih.biHeight=height;
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wah.bih.biPlanes=1;
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wah.bih.biBitCount=24;
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wah.bih.biCompression=fcc;
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wah.bih.biSizeImage=3*width*height;
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wah.bih.biXPelsPerMeter=
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wah.bih.biYPelsPerMeter=
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wah.bih.biClrUsed=
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wah.bih.biClrImportant=0;
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write_avi_header(f);
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}
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void avi_fixate(){
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// append index and fix avi headers:
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FILE *f1=fopen(encode_name,"r+");
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FILE *f2;
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if(!f1) return; // error
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fseek(f1,0,SEEK_END);
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wah.file_end=wah.movi_end=ftell(f1);
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// index:
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if(encode_index_name && (f2=fopen(encode_index_name,"rb"))){
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AVIINDEXENTRY idx;
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unsigned int pos=0;
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int frames=0;
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write_avi_chunk(f1,ckidAVINEWINDEX,0,NULL);
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while(fread(&idx,sizeof(idx),1,f2)>0){
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idx.dwChunkOffset-=wah.movi_start-4;
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fwrite(&idx,sizeof(idx),1,f1);
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++frames;
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}
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fclose(f2);
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unlink(encode_index_name);
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wah.file_end=ftell(f1);
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// re-write idx1 length:
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pos=wah.file_end-wah.movi_end-8;
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fseek(f1,wah.movi_end+4,SEEK_SET);
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fwrite(&pos,4,1,f1);
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// fixup frames:
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wah.avih.dwTotalFrames=frames;
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wah.video.dwLength=frames;
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}
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// re-write avi header:
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fseek(f1,0,SEEK_SET);
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write_avi_header(f1);
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fclose(f1);
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}
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