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