Add missing stdlib.h #include, fixes the warnings:
[libav.git] / tools / qt-faststart.c
1 /*
2 * qt-faststart.c, v0.2
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 *
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.
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
31 #ifdef __MINGW32__
32 #define fseeko(x,y,z) fseeko64(x,y,z)
33 #define ftello(x) ftello64(x)
34 #endif
35
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')
67 #define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')
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
76 int 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;
82 uint64_t atom_size = 0;
83 uint64_t atom_offset = 0;
84 uint64_t last_offset;
85 unsigned char *moov_atom;
86 unsigned char *ftyp_atom = 0;
87 uint64_t moov_atom_size;
88 uint64_t ftyp_atom_size = 0;
89 uint64_t i, j;
90 uint32_t offset_count;
91 uint64_t current_offset;
92 uint64_t start_offset = 0;
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 }
113 atom_size = (uint32_t)BE_32(&atom_bytes[0]);
114 atom_type = BE_32(&atom_bytes[4]);
115
116 /* keep ftyp atom */
117 if (atom_type == FTYP_ATOM) {
118 ftyp_atom_size = atom_size;
119 ftyp_atom = malloc(ftyp_atom_size);
120 if (!ftyp_atom) {
121 printf ("could not allocate %"PRIu64" byte for ftyp atom\n",
122 atom_size);
123 fclose(infile);
124 return 1;
125 }
126 fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
127 if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
128 perror(argv[1]);
129 free(ftyp_atom);
130 fclose(infile);
131 return 1;
132 }
133 start_offset = ftello(infile);
134 } else {
135
136 /* 64-bit special case */
137 if (atom_size == 1) {
138 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
139 break;
140 }
141 atom_size = BE_64(&atom_bytes[0]);
142 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
143 } else {
144 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
145 }
146 }
147 printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
148 (atom_type >> 24) & 255,
149 (atom_type >> 16) & 255,
150 (atom_type >> 8) & 255,
151 (atom_type >> 0) & 255,
152 atom_offset,
153 atom_size);
154 if ((atom_type != FREE_ATOM) &&
155 (atom_type != JUNK_ATOM) &&
156 (atom_type != MDAT_ATOM) &&
157 (atom_type != MOOV_ATOM) &&
158 (atom_type != PNOT_ATOM) &&
159 (atom_type != SKIP_ATOM) &&
160 (atom_type != WIDE_ATOM) &&
161 (atom_type != PICT_ATOM) &&
162 (atom_type != UUID_ATOM) &&
163 (atom_type != FTYP_ATOM)) {
164 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
165 break;
166 }
167 atom_offset += atom_size;
168 }
169
170 if (atom_type != MOOV_ATOM) {
171 printf ("last atom in file was not a moov atom\n");
172 fclose(infile);
173 return 0;
174 }
175
176 /* moov atom was, in fact, the last atom in the chunk; load the whole
177 * moov atom */
178 fseeko(infile, -atom_size, SEEK_END);
179 last_offset = ftello(infile);
180 moov_atom_size = atom_size;
181 moov_atom = malloc(moov_atom_size);
182 if (!moov_atom) {
183 printf ("could not allocate %"PRIu64" byte for moov atom\n",
184 atom_size);
185 fclose(infile);
186 return 1;
187 }
188 if (fread(moov_atom, atom_size, 1, infile) != 1) {
189 perror(argv[1]);
190 free(moov_atom);
191 fclose(infile);
192 return 1;
193 }
194
195 /* this utility does not support compressed atoms yet, so disqualify
196 * files with compressed QT atoms */
197 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
198 printf ("this utility does not support compressed moov atoms yet\n");
199 free(moov_atom);
200 fclose(infile);
201 return 1;
202 }
203
204 /* close; will be re-opened later */
205 fclose(infile);
206
207 /* crawl through the moov chunk in search of stco or co64 atoms */
208 for (i = 4; i < moov_atom_size - 4; i++) {
209 atom_type = BE_32(&moov_atom[i]);
210 if (atom_type == STCO_ATOM) {
211 printf (" patching stco atom...\n");
212 atom_size = BE_32(&moov_atom[i - 4]);
213 if (i + atom_size - 4 > moov_atom_size) {
214 printf (" bad atom size\n");
215 free(moov_atom);
216 return 1;
217 }
218 offset_count = BE_32(&moov_atom[i + 8]);
219 for (j = 0; j < offset_count; j++) {
220 current_offset = BE_32(&moov_atom[i + 12 + j * 4]);
221 current_offset += moov_atom_size;
222 moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
223 moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
224 moov_atom[i + 12 + j * 4 + 2] = (current_offset >> 8) & 0xFF;
225 moov_atom[i + 12 + j * 4 + 3] = (current_offset >> 0) & 0xFF;
226 }
227 i += atom_size - 4;
228 } else if (atom_type == CO64_ATOM) {
229 printf (" patching co64 atom...\n");
230 atom_size = BE_32(&moov_atom[i - 4]);
231 if (i + atom_size - 4 > moov_atom_size) {
232 printf (" bad atom size\n");
233 free(moov_atom);
234 return 1;
235 }
236 offset_count = BE_32(&moov_atom[i + 8]);
237 for (j = 0; j < offset_count; j++) {
238 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
239 current_offset += moov_atom_size;
240 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
241 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
242 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
243 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
244 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
245 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
246 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
247 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
248 }
249 i += atom_size - 4;
250 }
251 }
252
253 /* re-open the input file and open the output file */
254 infile = fopen(argv[1], "rb");
255 if (!infile) {
256 perror(argv[1]);
257 free(moov_atom);
258 return 1;
259 }
260
261 if (start_offset > 0) { /* seek after ftyp atom */
262 fseeko(infile, start_offset, SEEK_SET);
263 last_offset -= start_offset;
264 }
265
266 outfile = fopen(argv[2], "wb");
267 if (!outfile) {
268 perror(argv[2]);
269 fclose(outfile);
270 free(moov_atom);
271 return 1;
272 }
273
274 /* dump the same ftyp atom */
275 if (ftyp_atom_size > 0) {
276 printf (" writing ftyp atom...\n");
277 if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
278 perror(argv[2]);
279 goto error_out;
280 }
281 }
282
283 /* dump the new moov atom */
284 printf (" writing moov atom...\n");
285 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
286 perror(argv[2]);
287 goto error_out;
288 }
289
290 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
291 printf (" copying rest of file...\n");
292 while (last_offset) {
293 if (last_offset > COPY_BUFFER_SIZE)
294 bytes_to_copy = COPY_BUFFER_SIZE;
295 else
296 bytes_to_copy = last_offset;
297
298 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
299 perror(argv[1]);
300 goto error_out;
301 }
302 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
303 perror(argv[2]);
304 goto error_out;
305 }
306
307 last_offset -= bytes_to_copy;
308 }
309
310 fclose(infile);
311 fclose(outfile);
312 free(moov_atom);
313 if (ftyp_atom_size > 0)
314 free(ftyp_atom);
315
316 return 0;
317
318 error_out:
319 fclose(infile);
320 fclose(outfile);
321 free(moov_atom);
322 if (ftyp_atom_size > 0)
323 free(ftyp_atom);
324 return 1;
325 }