Grayscale support. Patch by Sebastian Vater <cdgs basty googlemail com>.
[libav.git] / tools / qt-faststart.c
CommitLineData
38100e8c 1/*
31457d7a 2 * qt-faststart.c, v0.2
38100e8c
MM
3 * by Mike Melanson (melanson@pcisys.net)
4 * This file is placed in the public domain. Use the program however you
5 * see fit.
6 *
7 * This utility rearranges a Quicktime file such that the moov atom
8 * is in front of the data, thus facilitating network streaming.
9 *
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MM
10 * To compile this program, start from the base directory from which you
11 * are building FFmpeg and type:
12 * make tools/qt-faststart
13 * The qt-faststart program will be built in the tools/ directory. If you
14 * do not build the program in this manner, correct results are not
15 * guaranteed, particularly on 64-bit platforms.
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MM
16 * Invoke the program with:
17 * qt-faststart <infile.mov> <outfile.mov>
18 *
19 * Notes: Quicktime files can come in many configurations of top-level
20 * atoms. This utility stipulates that the very last atom in the file needs
21 * to be a moov atom. When given such a file, this utility will rearrange
22 * the top-level atoms by shifting the moov atom from the back of the file
23 * to the front, and patch the chunk offsets along the way. This utility
24 * presently only operates on uncompressed moov atoms.
25 */
26
27#include <stdio.h>
28#include <stdlib.h>
29#include <inttypes.h>
30
a8fcaf40
SH
31#ifdef __MINGW32__
32#define fseeko(x,y,z) fseeko64(x,y,z)
33#define ftello(x) ftello64(x)
34#endif
35
38100e8c
MM
36#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
37#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
38 (((uint8_t*)(x))[1] << 16) | \
39 (((uint8_t*)(x))[2] << 8) | \
40 ((uint8_t*)(x))[3])
41#define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) | \
42 ((uint64_t)(((uint8_t*)(x))[1]) << 48) | \
43 ((uint64_t)(((uint8_t*)(x))[2]) << 40) | \
44 ((uint64_t)(((uint8_t*)(x))[3]) << 32) | \
45 ((uint64_t)(((uint8_t*)(x))[4]) << 24) | \
46 ((uint64_t)(((uint8_t*)(x))[5]) << 16) | \
47 ((uint64_t)(((uint8_t*)(x))[6]) << 8) | \
48 ((uint64_t)((uint8_t*)(x))[7]))
49
50#define BE_FOURCC( ch0, ch1, ch2, ch3 ) \
51 ( (uint32_t)(unsigned char)(ch3) | \
52 ( (uint32_t)(unsigned char)(ch2) << 8 ) | \
53 ( (uint32_t)(unsigned char)(ch1) << 16 ) | \
54 ( (uint32_t)(unsigned char)(ch0) << 24 ) )
55
56#define QT_ATOM BE_FOURCC
57/* top level atoms */
58#define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
59#define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
60#define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
61#define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
62#define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
63#define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
64#define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
65#define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
66#define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
31457d7a 67#define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')
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68
69#define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
70#define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
71#define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
72
73#define ATOM_PREAMBLE_SIZE 8
74#define COPY_BUFFER_SIZE 1024
75
76int main(int argc, char *argv[])
77{
78 FILE *infile;
79 FILE *outfile;
80 unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
81 uint32_t atom_type = 0;
c0339599 82 uint64_t atom_size = 0;
65b875d8 83 uint64_t atom_offset = 0;
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MM
84 uint64_t last_offset;
85 unsigned char *moov_atom;
60a9cc58 86 unsigned char *ftyp_atom = 0;
38100e8c 87 uint64_t moov_atom_size;
60a9cc58 88 uint64_t ftyp_atom_size = 0;
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MM
89 uint64_t i, j;
90 uint32_t offset_count;
91 uint64_t current_offset;
60a9cc58 92 uint64_t start_offset = 0;
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93 unsigned char copy_buffer[COPY_BUFFER_SIZE];
94 int bytes_to_copy;
95
96 if (argc != 3) {
97 printf ("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
98 return 0;
99 }
100
101 infile = fopen(argv[1], "rb");
102 if (!infile) {
103 perror(argv[1]);
104 return 1;
105 }
106
107 /* traverse through the atoms in the file to make sure that 'moov' is
108 * at the end */
109 while (!feof(infile)) {
110 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
111 break;
112 }
7db2245d 113 atom_size = (uint32_t)BE_32(&atom_bytes[0]);
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MM
114 atom_type = BE_32(&atom_bytes[4]);
115
60a9cc58
BC
116 /* keep ftyp atom */
117 if (atom_type == FTYP_ATOM) {
118 ftyp_atom_size = atom_size;
6ad533b7 119 free(ftyp_atom);
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BC
120 ftyp_atom = malloc(ftyp_atom_size);
121 if (!ftyp_atom) {
06a497af 122 printf ("could not allocate %"PRIu64" byte for ftyp atom\n",
60a9cc58
BC
123 atom_size);
124 fclose(infile);
125 return 1;
126 }
127 fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
128 if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
129 perror(argv[1]);
130 free(ftyp_atom);
131 fclose(infile);
132 return 1;
133 }
134 start_offset = ftello(infile);
65b875d8 135 } else {
60a9cc58 136
38100e8c
MM
137 /* 64-bit special case */
138 if (atom_size == 1) {
139 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
140 break;
141 }
142 atom_size = BE_64(&atom_bytes[0]);
e2daf554 143 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
38100e8c 144 } else {
e2daf554 145 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
38100e8c
MM
146 }
147 }
65b875d8
FB
148 printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
149 (atom_type >> 24) & 255,
150 (atom_type >> 16) & 255,
151 (atom_type >> 8) & 255,
152 (atom_type >> 0) & 255,
153 atom_offset,
154 atom_size);
155 if ((atom_type != FREE_ATOM) &&
156 (atom_type != JUNK_ATOM) &&
157 (atom_type != MDAT_ATOM) &&
158 (atom_type != MOOV_ATOM) &&
159 (atom_type != PNOT_ATOM) &&
160 (atom_type != SKIP_ATOM) &&
161 (atom_type != WIDE_ATOM) &&
162 (atom_type != PICT_ATOM) &&
163 (atom_type != UUID_ATOM) &&
164 (atom_type != FTYP_ATOM)) {
165 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
166 break;
167 }
168 atom_offset += atom_size;
169 }
38100e8c
MM
170
171 if (atom_type != MOOV_ATOM) {
172 printf ("last atom in file was not a moov atom\n");
d296a658 173 free(ftyp_atom);
38100e8c
MM
174 fclose(infile);
175 return 0;
176 }
177
178 /* moov atom was, in fact, the last atom in the chunk; load the whole
179 * moov atom */
e2daf554
BC
180 fseeko(infile, -atom_size, SEEK_END);
181 last_offset = ftello(infile);
38100e8c
MM
182 moov_atom_size = atom_size;
183 moov_atom = malloc(moov_atom_size);
184 if (!moov_atom) {
06a497af 185 printf ("could not allocate %"PRIu64" byte for moov atom\n",
38100e8c 186 atom_size);
d296a658 187 free(ftyp_atom);
38100e8c
MM
188 fclose(infile);
189 return 1;
190 }
191 if (fread(moov_atom, atom_size, 1, infile) != 1) {
192 perror(argv[1]);
193 free(moov_atom);
d296a658 194 free(ftyp_atom);
38100e8c
MM
195 fclose(infile);
196 return 1;
197 }
198
199 /* this utility does not support compressed atoms yet, so disqualify
200 * files with compressed QT atoms */
201 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
202 printf ("this utility does not support compressed moov atoms yet\n");
203 free(moov_atom);
d296a658 204 free(ftyp_atom);
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205 fclose(infile);
206 return 1;
207 }
208
209 /* close; will be re-opened later */
210 fclose(infile);
211
212 /* crawl through the moov chunk in search of stco or co64 atoms */
213 for (i = 4; i < moov_atom_size - 4; i++) {
214 atom_type = BE_32(&moov_atom[i]);
215 if (atom_type == STCO_ATOM) {
216 printf (" patching stco atom...\n");
217 atom_size = BE_32(&moov_atom[i - 4]);
218 if (i + atom_size - 4 > moov_atom_size) {
219 printf (" bad atom size\n");
220 free(moov_atom);
d296a658 221 free(ftyp_atom);
38100e8c
MM
222 return 1;
223 }
224 offset_count = BE_32(&moov_atom[i + 8]);
225 for (j = 0; j < offset_count; j++) {
226 current_offset = BE_32(&moov_atom[i + 12 + j * 4]);
227 current_offset += moov_atom_size;
228 moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
229 moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
230 moov_atom[i + 12 + j * 4 + 2] = (current_offset >> 8) & 0xFF;
231 moov_atom[i + 12 + j * 4 + 3] = (current_offset >> 0) & 0xFF;
232 }
233 i += atom_size - 4;
234 } else if (atom_type == CO64_ATOM) {
235 printf (" patching co64 atom...\n");
236 atom_size = BE_32(&moov_atom[i - 4]);
237 if (i + atom_size - 4 > moov_atom_size) {
238 printf (" bad atom size\n");
239 free(moov_atom);
d296a658 240 free(ftyp_atom);
38100e8c
MM
241 return 1;
242 }
243 offset_count = BE_32(&moov_atom[i + 8]);
244 for (j = 0; j < offset_count; j++) {
245 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
246 current_offset += moov_atom_size;
247 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
248 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
249 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
250 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
251 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
252 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
253 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
254 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
255 }
256 i += atom_size - 4;
257 }
258 }
259
260 /* re-open the input file and open the output file */
261 infile = fopen(argv[1], "rb");
262 if (!infile) {
263 perror(argv[1]);
264 free(moov_atom);
d296a658 265 free(ftyp_atom);
38100e8c
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266 return 1;
267 }
fd7789db
BC
268
269 if (start_offset > 0) { /* seek after ftyp atom */
270 fseeko(infile, start_offset, SEEK_SET);
271 last_offset -= start_offset;
272 }
60a9cc58 273
38100e8c
MM
274 outfile = fopen(argv[2], "wb");
275 if (!outfile) {
276 perror(argv[2]);
277 fclose(outfile);
278 free(moov_atom);
d296a658 279 free(ftyp_atom);
38100e8c
MM
280 return 1;
281 }
282
60a9cc58
BC
283 /* dump the same ftyp atom */
284 if (ftyp_atom_size > 0) {
285 printf (" writing ftyp atom...\n");
286 if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
287 perror(argv[2]);
288 goto error_out;
289 }
290 }
291
38100e8c 292 /* dump the new moov atom */
d4fcd7c6 293 printf (" writing moov atom...\n");
38100e8c
MM
294 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
295 perror(argv[2]);
296 goto error_out;
297 }
298
299 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
300 printf (" copying rest of file...\n");
301 while (last_offset) {
302 if (last_offset > COPY_BUFFER_SIZE)
303 bytes_to_copy = COPY_BUFFER_SIZE;
304 else
305 bytes_to_copy = last_offset;
306
307 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
308 perror(argv[1]);
309 goto error_out;
310 }
311 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
312 perror(argv[2]);
313 goto error_out;
314 }
315
316 last_offset -= bytes_to_copy;
317 }
318
319 fclose(infile);
320 fclose(outfile);
321 free(moov_atom);
331cb6c3 322 free(ftyp_atom);
38100e8c
MM
323
324 return 0;
325
326error_out:
327 fclose(infile);
328 fclose(outfile);
329 free(moov_atom);
331cb6c3 330 free(ftyp_atom);
38100e8c
MM
331 return 1;
332}