indeo4: remove two unused variables
[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 *
3c16e03d 10 * To compile this program, start from the base directory from which you
2912e87a 11 * are building Libav and type:
3c16e03d
MM
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.
38100e8c
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>
91a4abd8 30#include <string.h>
38100e8c 31
a8fcaf40
SH
32#ifdef __MINGW32__
33#define fseeko(x,y,z) fseeko64(x,y,z)
34#define ftello(x) ftello64(x)
35#endif
36
38100e8c
MM
37#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
38#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
39 (((uint8_t*)(x))[1] << 16) | \
40 (((uint8_t*)(x))[2] << 8) | \
41 ((uint8_t*)(x))[3])
42#define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) | \
43 ((uint64_t)(((uint8_t*)(x))[1]) << 48) | \
44 ((uint64_t)(((uint8_t*)(x))[2]) << 40) | \
45 ((uint64_t)(((uint8_t*)(x))[3]) << 32) | \
46 ((uint64_t)(((uint8_t*)(x))[4]) << 24) | \
47 ((uint64_t)(((uint8_t*)(x))[5]) << 16) | \
48 ((uint64_t)(((uint8_t*)(x))[6]) << 8) | \
49 ((uint64_t)((uint8_t*)(x))[7]))
50
51#define BE_FOURCC( ch0, ch1, ch2, ch3 ) \
52 ( (uint32_t)(unsigned char)(ch3) | \
53 ( (uint32_t)(unsigned char)(ch2) << 8 ) | \
54 ( (uint32_t)(unsigned char)(ch1) << 16 ) | \
55 ( (uint32_t)(unsigned char)(ch0) << 24 ) )
56
57#define QT_ATOM BE_FOURCC
58/* top level atoms */
59#define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
60#define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
61#define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
62#define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
63#define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
64#define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
65#define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
66#define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
67#define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
31457d7a 68#define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')
38100e8c
MM
69
70#define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
71#define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
72#define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
73
74#define ATOM_PREAMBLE_SIZE 8
75#define COPY_BUFFER_SIZE 1024
76
77int main(int argc, char *argv[])
78{
c937454d
MS
79 FILE *infile = NULL;
80 FILE *outfile = NULL;
38100e8c
MM
81 unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
82 uint32_t atom_type = 0;
c0339599 83 uint64_t atom_size = 0;
65b875d8 84 uint64_t atom_offset = 0;
38100e8c 85 uint64_t last_offset;
c937454d 86 unsigned char *moov_atom = NULL;
2ef9fd8e 87 unsigned char *ftyp_atom = NULL;
38100e8c 88 uint64_t moov_atom_size;
60a9cc58 89 uint64_t ftyp_atom_size = 0;
38100e8c
MM
90 uint64_t i, j;
91 uint32_t offset_count;
92 uint64_t current_offset;
60a9cc58 93 uint64_t start_offset = 0;
38100e8c
MM
94 unsigned char copy_buffer[COPY_BUFFER_SIZE];
95 int bytes_to_copy;
96
97 if (argc != 3) {
98 printf ("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
99 return 0;
100 }
101
91a4abd8
BC
102 if (!strcmp(argv[1], argv[2])) {
103 fprintf(stderr, "input and output files need to be different\n");
104 return 1;
105 }
106
38100e8c
MM
107 infile = fopen(argv[1], "rb");
108 if (!infile) {
109 perror(argv[1]);
c937454d 110 goto error_out;
38100e8c
MM
111 }
112
113 /* traverse through the atoms in the file to make sure that 'moov' is
114 * at the end */
115 while (!feof(infile)) {
116 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
117 break;
118 }
7db2245d 119 atom_size = (uint32_t)BE_32(&atom_bytes[0]);
38100e8c
MM
120 atom_type = BE_32(&atom_bytes[4]);
121
60a9cc58
BC
122 /* keep ftyp atom */
123 if (atom_type == FTYP_ATOM) {
124 ftyp_atom_size = atom_size;
6ad533b7 125 free(ftyp_atom);
60a9cc58
BC
126 ftyp_atom = malloc(ftyp_atom_size);
127 if (!ftyp_atom) {
06a497af 128 printf ("could not allocate %"PRIu64" byte for ftyp atom\n",
60a9cc58 129 atom_size);
c937454d 130 goto error_out;
60a9cc58
BC
131 }
132 fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
133 if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
134 perror(argv[1]);
c937454d 135 goto error_out;
60a9cc58
BC
136 }
137 start_offset = ftello(infile);
65b875d8 138 } else {
60a9cc58 139
38100e8c
MM
140 /* 64-bit special case */
141 if (atom_size == 1) {
142 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
143 break;
144 }
145 atom_size = BE_64(&atom_bytes[0]);
e2daf554 146 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
38100e8c 147 } else {
e2daf554 148 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
38100e8c
MM
149 }
150 }
65b875d8
FB
151 printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
152 (atom_type >> 24) & 255,
153 (atom_type >> 16) & 255,
154 (atom_type >> 8) & 255,
155 (atom_type >> 0) & 255,
156 atom_offset,
157 atom_size);
158 if ((atom_type != FREE_ATOM) &&
159 (atom_type != JUNK_ATOM) &&
160 (atom_type != MDAT_ATOM) &&
161 (atom_type != MOOV_ATOM) &&
162 (atom_type != PNOT_ATOM) &&
163 (atom_type != SKIP_ATOM) &&
164 (atom_type != WIDE_ATOM) &&
165 (atom_type != PICT_ATOM) &&
166 (atom_type != UUID_ATOM) &&
167 (atom_type != FTYP_ATOM)) {
168 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
169 break;
170 }
171 atom_offset += atom_size;
86e09922
MS
172
173 /* The atom header is 8 (or 16 bytes), if the atom size (which
174 * includes these 8 or 16 bytes) is less than that, we won't be
175 * able to continue scanning sensibly after this atom, so break. */
176 if (atom_size < 8)
177 break;
65b875d8 178 }
38100e8c
MM
179
180 if (atom_type != MOOV_ATOM) {
181 printf ("last atom in file was not a moov atom\n");
d296a658 182 free(ftyp_atom);
38100e8c
MM
183 fclose(infile);
184 return 0;
185 }
186
187 /* moov atom was, in fact, the last atom in the chunk; load the whole
188 * moov atom */
e2daf554
BC
189 fseeko(infile, -atom_size, SEEK_END);
190 last_offset = ftello(infile);
38100e8c
MM
191 moov_atom_size = atom_size;
192 moov_atom = malloc(moov_atom_size);
193 if (!moov_atom) {
06a497af 194 printf ("could not allocate %"PRIu64" byte for moov atom\n",
38100e8c 195 atom_size);
c937454d 196 goto error_out;
38100e8c
MM
197 }
198 if (fread(moov_atom, atom_size, 1, infile) != 1) {
199 perror(argv[1]);
c937454d 200 goto error_out;
38100e8c
MM
201 }
202
203 /* this utility does not support compressed atoms yet, so disqualify
204 * files with compressed QT atoms */
205 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
206 printf ("this utility does not support compressed moov atoms yet\n");
c937454d 207 goto error_out;
38100e8c
MM
208 }
209
210 /* close; will be re-opened later */
211 fclose(infile);
c937454d 212 infile = NULL;
38100e8c
MM
213
214 /* crawl through the moov chunk in search of stco or co64 atoms */
215 for (i = 4; i < moov_atom_size - 4; i++) {
216 atom_type = BE_32(&moov_atom[i]);
217 if (atom_type == STCO_ATOM) {
218 printf (" patching stco atom...\n");
219 atom_size = BE_32(&moov_atom[i - 4]);
220 if (i + atom_size - 4 > moov_atom_size) {
221 printf (" bad atom size\n");
c937454d 222 goto error_out;
38100e8c
MM
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");
c937454d 239 goto error_out;
38100e8c
MM
240 }
241 offset_count = BE_32(&moov_atom[i + 8]);
242 for (j = 0; j < offset_count; j++) {
243 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
244 current_offset += moov_atom_size;
245 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
246 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
247 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
248 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
249 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
250 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
251 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
252 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
253 }
254 i += atom_size - 4;
255 }
256 }
257
258 /* re-open the input file and open the output file */
259 infile = fopen(argv[1], "rb");
260 if (!infile) {
261 perror(argv[1]);
c937454d 262 goto error_out;
38100e8c 263 }
fd7789db
BC
264
265 if (start_offset > 0) { /* seek after ftyp atom */
266 fseeko(infile, start_offset, SEEK_SET);
267 last_offset -= start_offset;
268 }
60a9cc58 269
38100e8c
MM
270 outfile = fopen(argv[2], "wb");
271 if (!outfile) {
272 perror(argv[2]);
c937454d 273 goto error_out;
38100e8c
MM
274 }
275
60a9cc58
BC
276 /* dump the same ftyp atom */
277 if (ftyp_atom_size > 0) {
278 printf (" writing ftyp atom...\n");
279 if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
280 perror(argv[2]);
281 goto error_out;
282 }
283 }
284
38100e8c 285 /* dump the new moov atom */
d4fcd7c6 286 printf (" writing moov atom...\n");
38100e8c
MM
287 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
288 perror(argv[2]);
289 goto error_out;
290 }
291
292 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
293 printf (" copying rest of file...\n");
294 while (last_offset) {
295 if (last_offset > COPY_BUFFER_SIZE)
296 bytes_to_copy = COPY_BUFFER_SIZE;
297 else
298 bytes_to_copy = last_offset;
299
300 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
301 perror(argv[1]);
302 goto error_out;
303 }
304 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
305 perror(argv[2]);
306 goto error_out;
307 }
308
309 last_offset -= bytes_to_copy;
310 }
311
312 fclose(infile);
313 fclose(outfile);
314 free(moov_atom);
331cb6c3 315 free(ftyp_atom);
38100e8c
MM
316
317 return 0;
318
319error_out:
c937454d 320 if (infile)
e3d7269f 321 fclose(infile);
c937454d 322 if (outfile)
e3d7269f 323 fclose(outfile);
38100e8c 324 free(moov_atom);
331cb6c3 325 free(ftyp_atom);
38100e8c
MM
326 return 1;
327}