1 // show QuickTime .mov file structure (C) 2001. by A'rpi/ESP-team
2 // various hacks by alex@naxine.org
5 Blocks: 4bytes atom_size
6 4bytes atom_type (name)
9 By older files, mdat is at the beginning, and moov follows it later,
10 by newer files, moov is at the begininng.
14 trak: track: ezeken belul van egy-egy stream (video/audio)
15 tkhd: track header: fps (video esten picture size is itt van)
16 vmhd: video media handler (video stream informaciok)
17 smhd: sound media handler (audio stream informaciok)
25 char *atom2human_type(int type
)
29 case 0x766F6F6D: return ("Information sections"); /* moov */
30 case 0x6468766D: return ("Movie header"); /* mvhd */
31 case 0x6169646D: return ("Media stream"); /* mdia */
32 case 0x64686D76: return ("Video media header"); /* vmhd */
33 case 0x64686D73: return ("Sound media header"); /* smhd */
34 case 0x6468646D: return ("Media header"); /* mdhd */
35 case 0x666E696D: return ("Media information"); /* minf */
36 case 0x726C6468: return ("Handler reference"); /* hdlr */
37 case 0x6B617274: return ("New track (stream)"); /* trak */
38 case 0x75716D72: return ("rmqu");
39 case 0x65657266: return ("free");
40 case 0x64686B74: return ("Track header"); /* tkhd */
41 case 0x61746475: return ("User data"); /* udta */
42 case 0x7461646D: return ("Movie data"); /* mdat */
43 case 0x6C627473: return ("Sample information table"); /* stbl */
44 case 0x64737473: return ("Sample description"); /* stsd */
45 case 0x6F637473: return ("Chunk offset table"); /* stco */
46 case 0x73747473: return ("Sample time table"); /* stts */
47 case 0x63737473: return ("Sample->Chunk mapping table"); /* stsc */
48 case 0x7A737473: return ("Sample size table"); /* stsz */
60 unsigned int read_dword(FILE *f
){
61 unsigned char atom_size_b
[4];
62 if(fread(&atom_size_b
,4,1,f
)<=0) return -1;
63 return (atom_size_b
[0]<<24)|(atom_size_b
[1]<<16)|(atom_size_b
[2]<<8)|atom_size_b
[3];
66 void *video_stream_info(FILE *f
, int len
)
68 int orig_pos
= ftell(f
);
69 unsigned char data
[len
-8];
75 fread(&data
[i
], 1, 1, f
);
77 // strncpy(codec, &data[43], len-43);
78 // printf(" [codec: %s]\n", &codec);
79 fseek(f
,orig_pos
,SEEK_SET
);
82 void *audio_stream_info(FILE *f
, int len
)
84 int orig_pos
= ftell(f
);
85 unsigned char data
[len
-8];
90 fread(&data
[i
], 1, 1, f
);
92 printf(" [%d bit", data
[19]);
96 printf(" %d channels", data
[17]);
98 fseek(f
,orig_pos
,SEEK_SET
);
101 void *userdata_info(FILE *f
, int len
, int pos
, int level
)
103 int orig_pos
= pos
; /*ftell(f);*/
104 unsigned char data
[len
-8];
106 unsigned int atom_size
= 1;
107 unsigned int atom_type
;
109 // printf("userdata @ %d:%d (%d)\n", pos, pos+len, len);
111 // fseek(f, pos+3, SEEK_SET);
113 while (atom_size
!= 0)
115 atom_size
=read_dword(f
);// if(fread(&atom_size_b,4,1,f)<=0) break;
116 if(fread(&atom_type
,4,1,f
)<=0) break;
118 if(atom_size
<8) break; // error
120 // printf("%08X: %*s %.4s (%08X) %05d (begin: %08X)\n",pos,level*2,"",
121 // &atom_type,atom_type,atom_size,pos+8);
125 case 0x797063A9: /* cpy (copyright) */
127 char *data
= malloc(atom_size
-8);
129 fseek(f
, pos
+6, SEEK_SET
);
130 fread(data
, atom_size
-8, 1, f
);
131 printf(" Copyright: %s\n", data
);
135 case 0x666E69A9: /* inf (information) */
137 char data
[atom_size
-8];
139 fread(&data
, 1, atom_size
-8, f
);
140 printf(" Owner: %s\n", &data
);
143 case 0x6D616EA9: /* nam (name) */
145 char data
[atom_size
-8];
147 fread(&data
, 1, atom_size
-8, f
);
148 printf(" Name: %s\n", &data
);
153 fseek(f
,orig_pos
,SEEK_SET
);
158 void lschunks(FILE *f
,int level
,unsigned int endpos
){
159 unsigned int atom_size
;
160 unsigned int atom_type
;
163 while(endpos
==0 || ftell(f
)<endpos
){
165 atom_size
=read_dword(f
);// if(fread(&atom_size_b,4,1,f)<=0) break;
166 if(fread(&atom_type
,4,1,f
)<=0) break;
168 if(atom_size
<8) break; // error
170 printf("%08X: %*s %.4s (%08X) %05d [%s] (begin: %08X)\n",pos
,level
*2,"",&atom_type
,atom_type
,atom_size
,
171 atom2human_type(atom_type
), pos
+8); // 8: atom_size fields (4) + atom_type fields (4)
174 // if (atom_type == 0x61746475)
175 // userdata_info(f, atom_size, pos, level);
177 if (atom_type
== 0x6468646D)
181 fread(&data
, 1, 1, f
); // char
182 printf("mdhd version %d\n", data
[0]);
183 fread(&data
, 3, 1, f
); // int24
184 fread(&data
, 4, 1, f
); // int32
185 fread(&data
, 4, 1, f
); // int32
186 fread(&data
, 4, 1, f
); // int32
187 time_scale
= (data
[0] << 24) | (data
[1] << 16) | (data
[2] << 8) | data
[3];
188 printf("timescale: %d\n", time_scale
);
189 fread(&data
, 4, 1, f
); // int32
190 fread(&data
, 2, 1, f
); // int16
191 fread(&data
, 2, 1, f
); // int16
194 if (atom_type
== 0x64686D76)
197 printf(" Found VIDEO Stream #%d\n", v_stream
++);
200 if (atom_type
== 0x64686D73)
203 printf(" Found AUDIO Stream #%d\n", a_stream
++);
206 if (atom_type
== 0x64686B74) // tkhd - track header
209 unsigned char data
[atom_size
];
212 for (i
=0; i
<atom_size
; i
++)
213 fread(&data
[i
], 1, 1, f
);
217 printf(" Flags: %d\n", data
[3]);
218 printf(" Picture size: %dx%d\n", x
, y
);
219 if (x
== 0 && y
== 0)
220 printf(" Possible audio stream!\n");
223 if(atom_type
==0x64737473) { // stsd
228 count
=read_dword(f
);// fread(&count,4,1,f);
229 printf("desc count = %d\n",count
);
230 for(i
=0;i
<count
;i
++){
233 len
=read_dword(f
); // fread(&len,4,1,f);
234 fread(&format
,4,1,f
);
235 printf(" desc #%d: %.4s (%d)\n",i
+1,&format
,len
);
236 if (stream
== S_VIDEO
)
237 video_stream_info(f
, len
);
238 if (stream
== S_AUDIO
)
239 audio_stream_info(f
, len
);
240 fseek(f
,len
-8,SEEK_CUR
);
244 if(atom_type
==0x6F637473) { // stco
248 printf("Chunk table size :%d\n",len
);
249 for(i
=0;i
<len
;i
++) printf(" chunk #%d: 0x%X\n",i
+1,read_dword(f
));
253 if(atom_type
==0x73747473) { // stts
257 printf("T->S table size :%d\n",len
);
259 int num
=read_dword(f
);
260 int dur
=read_dword(f
);
261 printf("%5d samples: %d duration", num
, dur
);
262 if (stream
== S_AUDIO
)
263 printf("(rate: %f Hz)\n", (float)time_scale
/dur
);
265 printf("(fps: %f)\n", (float)time_scale
/dur
);
269 if(atom_type
==0x63737473) { // stsc
273 printf("S->C table size :%d\n",len
);
275 int first
=read_dword(f
);
276 int spc
=read_dword(f
);
277 int sdid
=read_dword(f
);
278 printf(" chunk %d... %d s/c desc: %d\n",first
,spc
,sdid
);
282 if(atom_type
==0x7A737473) { // stsz
287 printf("Sample size table len: %d\n",len
);
289 printf(" common sample size: %d bytes\n",ss
);
291 for(i
=0;i
<len
;i
++) printf(" sample #%d: %d bytes\n",i
+1,read_dword(f
));
298 case 0x7461646D: // mdat Movie data
299 case 0x75716D72: // rmqu
300 case 0x65657266: // free JUNK
301 case 0x64686B74: // tkhd Track header
302 case 0x61746475: // udta User data
303 case 0x64737473: // stsd Sample description
304 case 0x6F637473: // stco Chunk offset table
305 case 0x73747473: // stts Sample time table
306 case 0x63737473: // stsc Sample->Chunk mapping table
307 case 0x7A737473: // stsz Sample size table
308 case 0x746f6e70: // pnot
309 case 0x54434950: // PICT
312 default: lschunks(f
,level
+1,pos
+atom_size
);
316 case 0x766F6F6D: // moov
317 case 0x61726D72: // rmra
318 case 0x61646D72: // rmda
319 lschunks(f
,level
+1,pos
+atom_size
);
322 fseek(f
,pos
+atom_size
,SEEK_SET
);
326 int main(int argc
,char* argv
[])
330 if ((f
= fopen(argc
>1?argv
[1]:"Akira.mov","rb")) == NULL
)
333 printf("%.8s %.4s (%.8s) %05s [%s]\n\n",
334 "position", "atom", "atomtype", "len", "human readable atom name");
338 printf("\nSummary: streams: %d video/%d audio\n", v_stream
, a_stream
);