Add log_level_offset to AVCodecContext.
[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 = NULL;
79 FILE *outfile = NULL;
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 = NULL;
86 unsigned char *ftyp_atom = NULL;
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 goto error_out;
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 free(ftyp_atom);
120 ftyp_atom = malloc(ftyp_atom_size);
121 if (!ftyp_atom) {
122 printf ("could not allocate %"PRIu64" byte for ftyp atom\n",
123 atom_size);
124 goto error_out;
125 }
126 fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
127 if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
128 perror(argv[1]);
129 goto error_out;
130 }
131 start_offset = ftello(infile);
132 } else {
133
134 /* 64-bit special case */
135 if (atom_size == 1) {
136 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
137 break;
138 }
139 atom_size = BE_64(&atom_bytes[0]);
140 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
141 } else {
142 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
143 }
144 }
145 printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
146 (atom_type >> 24) & 255,
147 (atom_type >> 16) & 255,
148 (atom_type >> 8) & 255,
149 (atom_type >> 0) & 255,
150 atom_offset,
151 atom_size);
152 if ((atom_type != FREE_ATOM) &&
153 (atom_type != JUNK_ATOM) &&
154 (atom_type != MDAT_ATOM) &&
155 (atom_type != MOOV_ATOM) &&
156 (atom_type != PNOT_ATOM) &&
157 (atom_type != SKIP_ATOM) &&
158 (atom_type != WIDE_ATOM) &&
159 (atom_type != PICT_ATOM) &&
160 (atom_type != UUID_ATOM) &&
161 (atom_type != FTYP_ATOM)) {
162 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
163 break;
164 }
165 atom_offset += atom_size;
166
167 /* The atom header is 8 (or 16 bytes), if the atom size (which
168 * includes these 8 or 16 bytes) is less than that, we won't be
169 * able to continue scanning sensibly after this atom, so break. */
170 if (atom_size < 8)
171 break;
172 }
173
174 if (atom_type != MOOV_ATOM) {
175 printf ("last atom in file was not a moov atom\n");
176 free(ftyp_atom);
177 fclose(infile);
178 return 0;
179 }
180
181 /* moov atom was, in fact, the last atom in the chunk; load the whole
182 * moov atom */
183 fseeko(infile, -atom_size, SEEK_END);
184 last_offset = ftello(infile);
185 moov_atom_size = atom_size;
186 moov_atom = malloc(moov_atom_size);
187 if (!moov_atom) {
188 printf ("could not allocate %"PRIu64" byte for moov atom\n",
189 atom_size);
190 goto error_out;
191 }
192 if (fread(moov_atom, atom_size, 1, infile) != 1) {
193 perror(argv[1]);
194 goto error_out;
195 }
196
197 /* this utility does not support compressed atoms yet, so disqualify
198 * files with compressed QT atoms */
199 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
200 printf ("this utility does not support compressed moov atoms yet\n");
201 goto error_out;
202 }
203
204 /* close; will be re-opened later */
205 fclose(infile);
206 infile = NULL;
207
208 /* crawl through the moov chunk in search of stco or co64 atoms */
209 for (i = 4; i < moov_atom_size - 4; i++) {
210 atom_type = BE_32(&moov_atom[i]);
211 if (atom_type == STCO_ATOM) {
212 printf (" patching stco atom...\n");
213 atom_size = BE_32(&moov_atom[i - 4]);
214 if (i + atom_size - 4 > moov_atom_size) {
215 printf (" bad atom size\n");
216 goto error_out;
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 goto error_out;
234 }
235 offset_count = BE_32(&moov_atom[i + 8]);
236 for (j = 0; j < offset_count; j++) {
237 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
238 current_offset += moov_atom_size;
239 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
240 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
241 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
242 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
243 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
244 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
245 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
246 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
247 }
248 i += atom_size - 4;
249 }
250 }
251
252 /* re-open the input file and open the output file */
253 infile = fopen(argv[1], "rb");
254 if (!infile) {
255 perror(argv[1]);
256 goto error_out;
257 }
258
259 if (start_offset > 0) { /* seek after ftyp atom */
260 fseeko(infile, start_offset, SEEK_SET);
261 last_offset -= start_offset;
262 }
263
264 outfile = fopen(argv[2], "wb");
265 if (!outfile) {
266 perror(argv[2]);
267 goto error_out;
268 }
269
270 /* dump the same ftyp atom */
271 if (ftyp_atom_size > 0) {
272 printf (" writing ftyp atom...\n");
273 if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
274 perror(argv[2]);
275 goto error_out;
276 }
277 }
278
279 /* dump the new moov atom */
280 printf (" writing moov atom...\n");
281 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
282 perror(argv[2]);
283 goto error_out;
284 }
285
286 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
287 printf (" copying rest of file...\n");
288 while (last_offset) {
289 if (last_offset > COPY_BUFFER_SIZE)
290 bytes_to_copy = COPY_BUFFER_SIZE;
291 else
292 bytes_to_copy = last_offset;
293
294 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
295 perror(argv[1]);
296 goto error_out;
297 }
298 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
299 perror(argv[2]);
300 goto error_out;
301 }
302
303 last_offset -= bytes_to_copy;
304 }
305
306 fclose(infile);
307 fclose(outfile);
308 free(moov_atom);
309 free(ftyp_atom);
310
311 return 0;
312
313 error_out:
314 if (infile)
315 fclose(infile);
316 if (outfile)
317 fclose(outfile);
318 free(moov_atom);
319 free(ftyp_atom);
320 return 1;
321 }