Remove unused file
[libav.git] / qt-faststart.c
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1/*
2 * qt-faststart.c, v0.1
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 * Compile this program using:
bbec8c2c 11 * make qt-faststart
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12 * Invoke the program with:
13 * qt-faststart <infile.mov> <outfile.mov>
14 *
15 * Notes: Quicktime files can come in many configurations of top-level
16 * atoms. This utility stipulates that the very last atom in the file needs
17 * to be a moov atom. When given such a file, this utility will rearrange
18 * the top-level atoms by shifting the moov atom from the back of the file
19 * to the front, and patch the chunk offsets along the way. This utility
20 * presently only operates on uncompressed moov atoms.
21 */
22
23#include <stdio.h>
24#include <stdlib.h>
25#include <inttypes.h>
26
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27#ifdef __MINGW32__
28#define fseeko(x,y,z) fseeko64(x,y,z)
29#define ftello(x) ftello64(x)
30#endif
31
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32#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
33#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
34 (((uint8_t*)(x))[1] << 16) | \
35 (((uint8_t*)(x))[2] << 8) | \
36 ((uint8_t*)(x))[3])
37#define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) | \
38 ((uint64_t)(((uint8_t*)(x))[1]) << 48) | \
39 ((uint64_t)(((uint8_t*)(x))[2]) << 40) | \
40 ((uint64_t)(((uint8_t*)(x))[3]) << 32) | \
41 ((uint64_t)(((uint8_t*)(x))[4]) << 24) | \
42 ((uint64_t)(((uint8_t*)(x))[5]) << 16) | \
43 ((uint64_t)(((uint8_t*)(x))[6]) << 8) | \
44 ((uint64_t)((uint8_t*)(x))[7]))
45
46#define BE_FOURCC( ch0, ch1, ch2, ch3 ) \
47 ( (uint32_t)(unsigned char)(ch3) | \
48 ( (uint32_t)(unsigned char)(ch2) << 8 ) | \
49 ( (uint32_t)(unsigned char)(ch1) << 16 ) | \
50 ( (uint32_t)(unsigned char)(ch0) << 24 ) )
51
52#define QT_ATOM BE_FOURCC
53/* top level atoms */
54#define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
55#define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
56#define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
57#define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
58#define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
59#define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
60#define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
61#define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
62#define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
63
64#define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
65#define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
66#define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
67
68#define ATOM_PREAMBLE_SIZE 8
69#define COPY_BUFFER_SIZE 1024
70
71int main(int argc, char *argv[])
72{
73 FILE *infile;
74 FILE *outfile;
75 unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
76 uint32_t atom_type = 0;
c0339599 77 uint64_t atom_size = 0;
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78 uint64_t last_offset;
79 unsigned char *moov_atom;
60a9cc58 80 unsigned char *ftyp_atom = 0;
38100e8c 81 uint64_t moov_atom_size;
60a9cc58 82 uint64_t ftyp_atom_size = 0;
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83 uint64_t i, j;
84 uint32_t offset_count;
85 uint64_t current_offset;
60a9cc58 86 uint64_t start_offset = 0;
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87 unsigned char copy_buffer[COPY_BUFFER_SIZE];
88 int bytes_to_copy;
89
90 if (argc != 3) {
91 printf ("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
92 return 0;
93 }
94
95 infile = fopen(argv[1], "rb");
96 if (!infile) {
97 perror(argv[1]);
98 return 1;
99 }
100
101 /* traverse through the atoms in the file to make sure that 'moov' is
102 * at the end */
103 while (!feof(infile)) {
104 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
105 break;
106 }
7db2245d 107 atom_size = (uint32_t)BE_32(&atom_bytes[0]);
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108 atom_type = BE_32(&atom_bytes[4]);
109
110 if ((atom_type != FREE_ATOM) &&
111 (atom_type != JUNK_ATOM) &&
112 (atom_type != MDAT_ATOM) &&
113 (atom_type != MOOV_ATOM) &&
114 (atom_type != PNOT_ATOM) &&
115 (atom_type != SKIP_ATOM) &&
116 (atom_type != WIDE_ATOM) &&
117 (atom_type != PICT_ATOM) &&
118 (atom_type != FTYP_ATOM)) {
119 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
120 break;
121 }
122
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123 /* keep ftyp atom */
124 if (atom_type == FTYP_ATOM) {
125 ftyp_atom_size = atom_size;
126 ftyp_atom = malloc(ftyp_atom_size);
127 if (!ftyp_atom) {
128 printf ("could not allocate 0x%llX byte for ftyp atom\n",
129 atom_size);
130 fclose(infile);
131 return 1;
132 }
133 fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
134 if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
135 perror(argv[1]);
136 free(ftyp_atom);
137 fclose(infile);
138 return 1;
139 }
140 start_offset = ftello(infile);
141 continue;
142 }
143
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144 /* 64-bit special case */
145 if (atom_size == 1) {
146 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
147 break;
148 }
149 atom_size = BE_64(&atom_bytes[0]);
e2daf554 150 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
38100e8c 151 } else {
e2daf554 152 fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
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153 }
154 }
155
156 if (atom_type != MOOV_ATOM) {
157 printf ("last atom in file was not a moov atom\n");
158 fclose(infile);
159 return 0;
160 }
161
162 /* moov atom was, in fact, the last atom in the chunk; load the whole
163 * moov atom */
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164 fseeko(infile, -atom_size, SEEK_END);
165 last_offset = ftello(infile);
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166 moov_atom_size = atom_size;
167 moov_atom = malloc(moov_atom_size);
168 if (!moov_atom) {
169 printf ("could not allocate 0x%llX byte for moov atom\n",
170 atom_size);
171 fclose(infile);
172 return 1;
173 }
174 if (fread(moov_atom, atom_size, 1, infile) != 1) {
175 perror(argv[1]);
176 free(moov_atom);
177 fclose(infile);
178 return 1;
179 }
180
181 /* this utility does not support compressed atoms yet, so disqualify
182 * files with compressed QT atoms */
183 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
184 printf ("this utility does not support compressed moov atoms yet\n");
185 free(moov_atom);
186 fclose(infile);
187 return 1;
188 }
189
190 /* close; will be re-opened later */
191 fclose(infile);
192
193 /* crawl through the moov chunk in search of stco or co64 atoms */
194 for (i = 4; i < moov_atom_size - 4; i++) {
195 atom_type = BE_32(&moov_atom[i]);
196 if (atom_type == STCO_ATOM) {
197 printf (" patching stco atom...\n");
198 atom_size = BE_32(&moov_atom[i - 4]);
199 if (i + atom_size - 4 > moov_atom_size) {
200 printf (" bad atom size\n");
201 free(moov_atom);
202 return 1;
203 }
204 offset_count = BE_32(&moov_atom[i + 8]);
205 for (j = 0; j < offset_count; j++) {
206 current_offset = BE_32(&moov_atom[i + 12 + j * 4]);
207 current_offset += moov_atom_size;
208 moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
209 moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
210 moov_atom[i + 12 + j * 4 + 2] = (current_offset >> 8) & 0xFF;
211 moov_atom[i + 12 + j * 4 + 3] = (current_offset >> 0) & 0xFF;
212 }
213 i += atom_size - 4;
214 } else if (atom_type == CO64_ATOM) {
215 printf (" patching co64 atom...\n");
216 atom_size = BE_32(&moov_atom[i - 4]);
217 if (i + atom_size - 4 > moov_atom_size) {
218 printf (" bad atom size\n");
219 free(moov_atom);
220 return 1;
221 }
222 offset_count = BE_32(&moov_atom[i + 8]);
223 for (j = 0; j < offset_count; j++) {
224 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
225 current_offset += moov_atom_size;
226 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
227 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
228 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
229 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
230 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
231 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
232 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
233 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
234 }
235 i += atom_size - 4;
236 }
237 }
238
239 /* re-open the input file and open the output file */
240 infile = fopen(argv[1], "rb");
241 if (!infile) {
242 perror(argv[1]);
243 free(moov_atom);
244 return 1;
245 }
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246
247 if (start_offset > 0) { /* seek after ftyp atom */
248 fseeko(infile, start_offset, SEEK_SET);
249 last_offset -= start_offset;
250 }
60a9cc58 251
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252 outfile = fopen(argv[2], "wb");
253 if (!outfile) {
254 perror(argv[2]);
255 fclose(outfile);
256 free(moov_atom);
257 return 1;
258 }
259
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260 /* dump the same ftyp atom */
261 if (ftyp_atom_size > 0) {
262 printf (" writing ftyp atom...\n");
263 if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
264 perror(argv[2]);
265 goto error_out;
266 }
267 }
268
38100e8c 269 /* dump the new moov atom */
d4fcd7c6 270 printf (" writing moov atom...\n");
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271 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
272 perror(argv[2]);
273 goto error_out;
274 }
275
276 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
277 printf (" copying rest of file...\n");
278 while (last_offset) {
279 if (last_offset > COPY_BUFFER_SIZE)
280 bytes_to_copy = COPY_BUFFER_SIZE;
281 else
282 bytes_to_copy = last_offset;
283
284 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
285 perror(argv[1]);
286 goto error_out;
287 }
288 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
289 perror(argv[2]);
290 goto error_out;
291 }
292
293 last_offset -= bytes_to_copy;
294 }
295
296 fclose(infile);
297 fclose(outfile);
298 free(moov_atom);
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299 if (ftyp_atom_size > 0)
300 free(ftyp_atom);
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301
302 return 0;
303
304error_out:
305 fclose(infile);
306 fclose(outfile);
307 free(moov_atom);
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308 if (ftyp_atom_size > 0)
309 free(ftyp_atom);
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310 return 1;
311}