mirror of
https://github.com/mpv-player/mpv
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125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
// show QuickTime .mov file structure (C) 2001. by A'rpi/ESP-team
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#include <stdio.h>
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#include <stdlib.h>
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unsigned int read_dword(FILE *f){
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unsigned char atom_size_b[4];
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if(fread(&atom_size_b,4,1,f)<=0) return -1;
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return (atom_size_b[0]<<24)|(atom_size_b[1]<<16)|(atom_size_b[2]<<8)|atom_size_b[3];
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}
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void lschunks(FILE *f,int level,unsigned int endpos){
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unsigned int atom_size;
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unsigned int atom_type;
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int pos;
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while(endpos==0 || ftell(f)<endpos){
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pos=ftell(f);
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atom_size=read_dword(f);// if(fread(&atom_size_b,4,1,f)<=0) break;
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if(fread(&atom_type,4,1,f)<=0) break;
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if(atom_size<8) break; // error
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printf("%08X: %*s %.4s (%08X) %d\n",pos,level*2,"",&atom_type,atom_type,atom_size);
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if(atom_type==0x64737473) { // stsd
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unsigned int tmp;
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unsigned int count;
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int i;
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fread(&tmp,4,1,f);
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count=read_dword(f);// fread(&count,4,1,f);
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printf("desc count = %d\n",count);
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for(i=0;i<count;i++){
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unsigned int len;
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unsigned int format;
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len=read_dword(f); // fread(&len,4,1,f);
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fread(&format,4,1,f);
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printf(" desc #%d: %.4s (%d)\n",i+1,&format,len);
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fseek(f,len-8,SEEK_CUR);
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}
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}
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if(atom_type==0x6F637473) { // stco
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int len,i;
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read_dword(f);
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len=read_dword(f);
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printf("Chunk table size :%d\n",len);
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for(i=0;i<len;i++) printf(" chunk #%d: 0x%X\n",i+1,read_dword(f));
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}
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if(atom_type==0x73747473) { // stts
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int len,i;
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read_dword(f);
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len=read_dword(f);
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printf("T->S table size :%d\n",len);
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for(i=0;i<len;i++){
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int num=read_dword(f);
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int dur=read_dword(f);
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printf("%5d samples: %d duration\n",num,dur);
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}
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}
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if(atom_type==0x63737473) { // stsc
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int len,i;
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read_dword(f);
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len=read_dword(f);
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printf("S->C table size :%d\n",len);
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for(i=0;i<len;i++){
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int first=read_dword(f);
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int spc=read_dword(f);
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int sdid=read_dword(f);
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printf(" chunk %d... %d s/c desc: %d\n",first,spc,sdid);
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}
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}
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if(atom_type==0x7A737473) { // stsz
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int len,i,ss;
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read_dword(f);
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ss=read_dword(f);
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len=read_dword(f);
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printf("Sample size table len: %d\n",len);
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if(ss){
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printf(" common sample size: %d bytes\n",ss);
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} else {
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for(i=0;i<len;i++) printf(" sample #%d: %d bytes\n",i+1,read_dword(f));
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}
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}
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#if 1
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switch(atom_type){
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case 0x75716D72: // rmqu
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case 0x65657266: // free JUNK
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case 0x64686B74: // tkhd Track header
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case 0x61746475: // udta User data
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case 0x7461646D: // mdat Movie data
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case 0x64737473: // stsd Sample description
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case 0x6F637473: // stco Chunk offset table
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case 0x73747473: // stts Sample time table
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case 0x63737473: // stsc Sample->Chunk mapping table
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case 0x7A737473: // stsz Sample size table
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break;
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default: lschunks(f,level+1,pos+atom_size);
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}
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#else
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switch(atom_type){
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case 0x766F6F6D: // moov
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case 0x61726D72: // rmra
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case 0x61646D72: // rmda
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lschunks(f,level+1,pos+atom_size);
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}
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#endif
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fseek(f,pos+atom_size,SEEK_SET);
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}
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}
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int main(int argc,char* argv[]){
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int pos;
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FILE *f=fopen(argc>1?argv[1]:"Akira.mov","rb");
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if(!f) return 1;
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lschunks(f,0,0);
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}
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