mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 08:29:42 +00:00
a3735cb42d
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@11925 b3059339-0415-0410-9bf9-f77b7e298cf2
137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
// avi-fix v0.1 (C) A'rpi, license GPL
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// simple tool to fix chunk sizes in a RIFF AVI file
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// it doesn't check/fix index, use mencoder -forceidx -oac copy -ovc copy to fix index!
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#include <stdio.h>
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#include <stdlib.h>
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//#include <string.h>
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#define FCC(a,b,c,d) (((a)<<24)|((b)<<16)|((c)<<8)|(d))
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static inline xx(unsigned char c){
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if(c>=32 && c<128) return c;
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return '?';
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}
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static inline unsigned int getid(FILE* f){
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unsigned int id;
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id=fgetc(f);
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id=(id<<8)|fgetc(f);
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id=(id<<8)|fgetc(f);
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id=(id<<8)|fgetc(f);
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return id;
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}
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int main(int argc,char* argv[]){
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//FILE* f=fopen("edgar.avi","rb"); // readonly (report errors)
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//FILE* f=fopen("edgar.avi","rb+"); // fix mode (fix chunk sizes)
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unsigned int lastgood=0;
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unsigned int fixat=0;
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unsigned int offset=0;
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int fix_flag=0;
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FILE* f;
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if(argc<=1){
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printf("Usage: %s [-fix] badfile.avi\n",argv[0]);
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exit(1);
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}
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if(!strcmp(argv[1],"-fix")){
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fix_flag=1;
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f=fopen(argv[argc-1],"rb+");
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} else
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f=fopen(argv[argc-1],"rb");
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if(!f){
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perror("error");
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printf("couldnt open '%s'\n",argv[argc-1]);
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exit(2);
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}
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while(1){
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unsigned int id,len;
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again:
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id=fgetc(f);
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id=(id<<8)|fgetc(f);
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id=(id<<8)|fgetc(f);
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faszom:
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if(feof(f)) break;
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// if(!lastgood && feof(f)) break;
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id=(id<<8)|fgetc(f);
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// lastgood=ftell(f);
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printf("%08X: %c%c%c%c\n",(int)ftell(f)-4,xx(id>>24),xx(id>>16),xx(id>>8),xx(id));
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switch(id){
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case FCC('R','I','F','F'):
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fread(&len,4,1,f); // filesize
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id=getid(f); // AVI
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printf("RIFF header, filesize=0x%X format=%c%c%c%c\n",len,xx(id>>24),xx(id>>16),xx(id>>8),xx(id));
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break;
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case FCC('L','I','S','T'):
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fread(&len,4,1,f); // size
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id=getid(f); // AVI
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printf("LIST size=0x%X format=%c%c%c%c\n",len,xx(id>>24),xx(id>>16),xx(id>>8),xx(id));
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//case FCC('h','d','r','l'):
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//case FCC('s','t','r','l'):
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//case FCC('o','d','m','l'):
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//case FCC('m','o','v','i'):
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break;
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// legal chunk IDs:
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case FCC('a','v','i','h'): // avi header
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case FCC('s','t','r','h'): // stream header
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case FCC('s','t','r','f'): // stream format
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case FCC('J','U','N','K'): // official shit
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// index:
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case FCC('i','d','x','1'): // main index??
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case FCC('d','m','l','h'): // opendml header
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case FCC('i','n','d','x'): // opendml main index??
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case FCC('i','x','0','0'): // opendml sub index??
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case FCC('i','x','0','1'): // opendml sub index??
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// data:
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case FCC('0','1','w','b'): // audio track #1
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case FCC('0','2','w','b'): // audio track #2
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case FCC('0','3','w','b'): // audio track #3
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case FCC('0','0','d','b'): // uncompressed video
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case FCC('0','0','d','c'): // compressed video
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case FCC('0','0','_','_'): // A-V interleaved (type2 DV file)
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// info:
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case FCC('I','S','F','T'): // INFO: software
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case FCC('I','S','R','C'): // INFO: source
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case FCC('I','N','A','M'): // INFO: name
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case FCC('I','S','B','J'): // INFO: subject
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case FCC('I','A','R','T'): // INFO: artist
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case FCC('I','C','O','P'): // INFO: copyright
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case FCC('I','C','M','T'): // INFO: comment
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lastgood=ftell(f);
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if(fixat && fix_flag){
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// fix last chunk's size field:
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fseek(f,fixat,SEEK_SET);
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len=lastgood-fixat-8;
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printf("Correct len to 0x%X\n",len);
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fwrite(&len,4,1,f);
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fseek(f,lastgood,SEEK_SET);
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fixat=0;
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}
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fread(&len,4,1,f); // size
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printf("ID ok, chunk len=0x%X\n",len);
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len+=len&1; // align at 2
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fseek(f,len,SEEK_CUR); // skip data
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break;
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default:
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if(!lastgood){
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++offset;
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printf("invalid ID, trying %d byte offset\n",offset);
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goto faszom; // try again @ next post
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}
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printf("invalid ID, parsing next chunk's data at 0x%X\n",lastgood);
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fseek(f,lastgood,SEEK_SET);
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fixat=lastgood;
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lastgood=0;
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goto again;
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}
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offset=0;
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}
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}
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