mpv/TOOLS/movinfo.c

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/* show QuickTime .mov file structure (C) 2001. by A'rpi/ESP-team
* various hacks by alex@naxine.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
Blocks: 4bytes atom_size
4bytes atom_type (name)
...
By older files, mdat is at the beginning, and moov follows it later,
by newer files, moov is at the begininng.
Fontosabb typeok:
trak: track: ezeken belul van egy-egy stream (video/audio)
tkhd: track header: fps (video esten picture size is itt van)
vmhd: video media handler (video stream informaciok)
smhd: sound media handler (audio stream informaciok)
*/
#include <stdio.h>
#include <stdlib.h>
#undef NO_SPECIAL
static char *atom2human_type(int type)
{
switch (type)
{
case 0x766F6F6D: return "Information sections"; /* moov */
case 0x6468766D: return "Movie header"; /* mvhd */
case 0x6169646D: return "Media stream"; /* mdia */
case 0x64686D76: return "Video media header"; /* vmhd */
case 0x64686D73: return "Sound media header"; /* smhd */
case 0x6468646D: return "Media header"; /* mdhd */
case 0x666E696D: return "Media information"; /* minf */
case 0x726C6468: return "Handler reference"; /* hdlr */
case 0x6B617274: return "New track (stream)"; /* trak */
case 0x75716D72: return "rmqu";
case 0x65657266: return "free";
case 0x64686B74: return "Track header"; /* tkhd */
case 0x61746475: return "User data"; /* udta */
case 0x7461646D: return "Movie data"; /* mdat */
case 0x6C627473: return "Sample information table"; /* stbl */
case 0x64737473: return "Sample description"; /* stsd */
case 0x6F637473: return "Chunk offset table"; /* stco */
case 0x73747473: return "Sample time table"; /* stts */
case 0x63737473: return "Sample->Chunk mapping table"; /* stsc */
case 0x7A737473: return "Sample size table"; /* stsz */
}
return "unknown";
}
#define S_NONE 0
#define S_AUDIO 1
#define S_VIDEO 2
int stream = S_NONE;
int v_stream = 0;
int a_stream = 0;
static 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];
}
static void video_stream_info(FILE *f, int len)
{
int orig_pos = ftell(f);
unsigned char data[len-8];
int i;
// char codec[len-8];
len -= 8;
for (i=0; i<len; i++)
fread(&data[i], 1, 1, f);
// strncpy(codec, &data[43], len-43);
// printf(" [codec: %s]\n", &codec);
fseek(f,orig_pos,SEEK_SET);
}
static void audio_stream_info(FILE *f, int len)
{
int orig_pos = ftell(f);
unsigned char data[len-8];
int i;
len -= 8;
for (i=0; i<len; i++)
fread(&data[i], 1, 1, f);
printf(" [%d bit", data[19]);
if (data[17] == 1)
printf(" mono");
else
printf(" %d channels", data[17]);
printf("]\n");
fseek(f,orig_pos,SEEK_SET);
}
#if 0
static void userdata_info(FILE *f, int len, int pos, int level)
{
int orig_pos = pos; /*ftell(f);*/
unsigned int atom_size = 1;
unsigned int atom_type;
// printf("userdata @ %d:%d (%d)\n", pos, pos+len, len);
// fseek(f, pos+3, SEEK_SET);
while (atom_size != 0)
{
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) %05d (begin: %08X)\n",pos,level*2,"",
// &atom_type,atom_type,atom_size,pos+8);
switch(atom_type)
{
case 0x797063A9: /* cpy (copyright) */
{
char *data = malloc(atom_size-8);
fseek(f, pos+6, SEEK_SET);
fread(data, atom_size-8, 1, f);
printf(" Copyright: %s\n", data);
free(data);
}
break;
case 0x666E69A9: /* inf (information) */
{
char data[atom_size-8];
fread(&data, 1, atom_size-8, f);
printf(" Owner: %s\n", &data);
}
break;
case 0x6D616EA9: /* nam (name) */
{
char data[atom_size-8];
fread(&data, 1, atom_size-8, f);
printf(" Name: %s\n", &data);
}
break;
}
}
fseek(f,orig_pos,SEEK_SET);
}
#endif
int time_scale = 0;
static 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) %05d [%s] (begin: %08X)\n",pos,level*2,"",&atom_type,atom_type,atom_size,
atom2human_type(atom_type), pos+8); // 8: atom_size fields (4) + atom_type fields (4)
#ifndef NO_SPECIAL
// if (atom_type == 0x61746475)
// userdata_info(f, atom_size, pos, level);
if (atom_type == 0x6468646D)
{
char data[4];
fread(&data, 1, 1, f); // char
printf("mdhd version %d\n", data[0]);
fread(&data, 3, 1, f); // int24
fread(&data, 4, 1, f); // int32
fread(&data, 4, 1, f); // int32
fread(&data, 4, 1, f); // int32
time_scale = (data[0] << 24) | (data[1] << 16) | (data[2] << 8) | data[3];
printf("timescale: %d\n", time_scale);
fread(&data, 4, 1, f); // int32
fread(&data, 2, 1, f); // int16
fread(&data, 2, 1, f); // int16
}
if (atom_type == 0x64686D76)
{
stream = S_VIDEO;
printf(" Found VIDEO Stream #%d\n", v_stream++);
}
if (atom_type == 0x64686D73)
{
stream = S_AUDIO;
printf(" Found AUDIO Stream #%d\n", a_stream++);
}
if (atom_type == 0x64686B74) // tkhd - track header
{
int i;
unsigned char data[atom_size];
int x, y;
for (i=0; i<atom_size; i++)
fread(&data[i], 1, 1, f);
x = data[77];
y = data[81];
printf(" Flags: %d\n", data[3]);
printf(" Picture size: %dx%d\n", x, y);
if (x == 0 && y == 0)
printf(" Possible audio stream!\n");
}
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);
if (stream == S_VIDEO)
video_stream_info(f, len);
if (stream == S_AUDIO)
audio_stream_info(f, 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", num, dur);
if (stream == S_AUDIO)
printf("(rate: %f Hz)\n", (float)time_scale/dur);
else
printf("(fps: %f)\n", (float)time_scale/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));
}
}
#endif
#if 1
switch(atom_type){
case 0x7461646D: // mdat Movie data
case 0x75716D72: // rmqu
case 0x65657266: // free JUNK
case 0x64686B74: // tkhd Track header
case 0x61746475: // udta User 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
case 0x746f6e70: // pnot
case 0x54434950: // PICT
case 0x70797466:
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[])
{
FILE *f;
if ((f = fopen(argc>1?argv[1]:"Akira.mov","rb")) == NULL)
return 1;
printf("%.8s %.4s (%.8s) %5s [%s]\n\n",
"position", "atom", "atomtype", "len", "human readable atom name");
lschunks(f, 0, 0);
printf("\nSummary: streams: %d video/%d audio\n", v_stream, a_stream);
return 0;
}