vhook watermark patch by (Marcus Engene: ffmpeg, engene se)
[libav.git] / qt-faststart.c
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:
11 * cc qt-faststart.c -o qt-faststart
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
27 #define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
28 #define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
29 (((uint8_t*)(x))[1] << 16) | \
30 (((uint8_t*)(x))[2] << 8) | \
31 ((uint8_t*)(x))[3])
32 #define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) | \
33 ((uint64_t)(((uint8_t*)(x))[1]) << 48) | \
34 ((uint64_t)(((uint8_t*)(x))[2]) << 40) | \
35 ((uint64_t)(((uint8_t*)(x))[3]) << 32) | \
36 ((uint64_t)(((uint8_t*)(x))[4]) << 24) | \
37 ((uint64_t)(((uint8_t*)(x))[5]) << 16) | \
38 ((uint64_t)(((uint8_t*)(x))[6]) << 8) | \
39 ((uint64_t)((uint8_t*)(x))[7]))
40
41 #define BE_FOURCC( ch0, ch1, ch2, ch3 ) \
42 ( (uint32_t)(unsigned char)(ch3) | \
43 ( (uint32_t)(unsigned char)(ch2) << 8 ) | \
44 ( (uint32_t)(unsigned char)(ch1) << 16 ) | \
45 ( (uint32_t)(unsigned char)(ch0) << 24 ) )
46
47 #define QT_ATOM BE_FOURCC
48 /* top level atoms */
49 #define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
50 #define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
51 #define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
52 #define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
53 #define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
54 #define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
55 #define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
56 #define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
57 #define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
58
59 #define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
60 #define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
61 #define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
62
63 #define ATOM_PREAMBLE_SIZE 8
64 #define COPY_BUFFER_SIZE 1024
65
66 int main(int argc, char *argv[])
67 {
68 FILE *infile;
69 FILE *outfile;
70 unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
71 uint32_t atom_type = 0;
72 uint64_t atom_size;
73 uint64_t last_offset;
74 unsigned char *moov_atom;
75 uint64_t moov_atom_size;
76 uint64_t i, j;
77 uint32_t offset_count;
78 uint64_t current_offset;
79 unsigned char copy_buffer[COPY_BUFFER_SIZE];
80 int bytes_to_copy;
81
82 if (argc != 3) {
83 printf ("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
84 return 0;
85 }
86
87 infile = fopen(argv[1], "rb");
88 if (!infile) {
89 perror(argv[1]);
90 return 1;
91 }
92
93 /* traverse through the atoms in the file to make sure that 'moov' is
94 * at the end */
95 while (!feof(infile)) {
96 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
97 break;
98 }
99 atom_size = BE_32(&atom_bytes[0]);
100 atom_type = BE_32(&atom_bytes[4]);
101
102 if ((atom_type != FREE_ATOM) &&
103 (atom_type != JUNK_ATOM) &&
104 (atom_type != MDAT_ATOM) &&
105 (atom_type != MOOV_ATOM) &&
106 (atom_type != PNOT_ATOM) &&
107 (atom_type != SKIP_ATOM) &&
108 (atom_type != WIDE_ATOM) &&
109 (atom_type != PICT_ATOM) &&
110 (atom_type != FTYP_ATOM)) {
111 printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
112 break;
113 }
114
115 /* 64-bit special case */
116 if (atom_size == 1) {
117 if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
118 break;
119 }
120 atom_size = BE_64(&atom_bytes[0]);
121 fseek(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
122 } else {
123 fseek(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
124 }
125 }
126
127 if (atom_type != MOOV_ATOM) {
128 printf ("last atom in file was not a moov atom\n");
129 fclose(infile);
130 return 0;
131 }
132
133 /* moov atom was, in fact, the last atom in the chunk; load the whole
134 * moov atom */
135 fseek(infile, -atom_size, SEEK_END);
136 last_offset = (uint64_t)ftell(infile);
137 moov_atom_size = atom_size;
138 moov_atom = malloc(moov_atom_size);
139 if (!moov_atom) {
140 printf ("could not allocate 0x%llX byte for moov atom\n",
141 atom_size);
142 fclose(infile);
143 return 1;
144 }
145 if (fread(moov_atom, atom_size, 1, infile) != 1) {
146 perror(argv[1]);
147 free(moov_atom);
148 fclose(infile);
149 return 1;
150 }
151
152 /* this utility does not support compressed atoms yet, so disqualify
153 * files with compressed QT atoms */
154 if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
155 printf ("this utility does not support compressed moov atoms yet\n");
156 free(moov_atom);
157 fclose(infile);
158 return 1;
159 }
160
161 /* close; will be re-opened later */
162 fclose(infile);
163
164 /* crawl through the moov chunk in search of stco or co64 atoms */
165 for (i = 4; i < moov_atom_size - 4; i++) {
166 atom_type = BE_32(&moov_atom[i]);
167 if (atom_type == STCO_ATOM) {
168 printf (" patching stco atom...\n");
169 atom_size = BE_32(&moov_atom[i - 4]);
170 if (i + atom_size - 4 > moov_atom_size) {
171 printf (" bad atom size\n");
172 free(moov_atom);
173 return 1;
174 }
175 offset_count = BE_32(&moov_atom[i + 8]);
176 for (j = 0; j < offset_count; j++) {
177 current_offset = BE_32(&moov_atom[i + 12 + j * 4]);
178 current_offset += moov_atom_size;
179 moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
180 moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
181 moov_atom[i + 12 + j * 4 + 2] = (current_offset >> 8) & 0xFF;
182 moov_atom[i + 12 + j * 4 + 3] = (current_offset >> 0) & 0xFF;
183 }
184 i += atom_size - 4;
185 } else if (atom_type == CO64_ATOM) {
186 printf (" patching co64 atom...\n");
187 atom_size = BE_32(&moov_atom[i - 4]);
188 if (i + atom_size - 4 > moov_atom_size) {
189 printf (" bad atom size\n");
190 free(moov_atom);
191 return 1;
192 }
193 offset_count = BE_32(&moov_atom[i + 8]);
194 for (j = 0; j < offset_count; j++) {
195 current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
196 current_offset += moov_atom_size;
197 moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
198 moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
199 moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
200 moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
201 moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
202 moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
203 moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
204 moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
205 }
206 i += atom_size - 4;
207 }
208 }
209
210 /* re-open the input file and open the output file */
211 infile = fopen(argv[1], "rb");
212 if (!infile) {
213 perror(argv[1]);
214 free(moov_atom);
215 return 1;
216 }
217 outfile = fopen(argv[2], "wb");
218 if (!outfile) {
219 perror(argv[2]);
220 fclose(outfile);
221 free(moov_atom);
222 return 1;
223 }
224
225 /* dump the new moov atom */
226 printf (" writing moov atom...\n");
227 if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
228 perror(argv[2]);
229 goto error_out;
230 }
231
232 /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
233 printf (" copying rest of file...\n");
234 while (last_offset) {
235 if (last_offset > COPY_BUFFER_SIZE)
236 bytes_to_copy = COPY_BUFFER_SIZE;
237 else
238 bytes_to_copy = last_offset;
239
240 if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
241 perror(argv[1]);
242 goto error_out;
243 }
244 if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
245 perror(argv[2]);
246 goto error_out;
247 }
248
249 last_offset -= bytes_to_copy;
250 }
251
252 fclose(infile);
253 fclose(outfile);
254 free(moov_atom);
255
256 return 0;
257
258 error_out:
259 fclose(infile);
260 fclose(outfile);
261 free(moov_atom);
262 return 1;
263 }