48e2f01c |
1 | /* |
2 | * Copyright (C) 2013 nu774 |
3 | * For conditions of distribution and use, see copyright notice in COPYING |
4 | */ |
5 | #if HAVE_CONFIG_H |
6 | # include "config.h" |
7 | #endif |
8 | #include <stdio.h> |
9 | #include <stdlib.h> |
10 | #include <string.h> |
e4bbeeb0 |
11 | #include <assert.h> |
48e2f01c |
12 | #include <time.h> |
13 | #if HAVE_STDINT_H |
14 | # include <stdint.h> |
15 | #endif |
e4bbeeb0 |
16 | #if HAVE_INTTYPES_H |
17 | # include <inttypes.h> |
18 | #elif defined _MSC_VER |
19 | # define PRId64 "I64d" |
20 | #endif |
48e2f01c |
21 | #include "m4af.h" |
22 | #include "m4af_endian.h" |
23 | |
24 | #define m4af_realloc(memory,size) realloc(memory, size) |
25 | #define m4af_free(memory) free(memory) |
26 | |
e4bbeeb0 |
27 | #define M4AF_ATOM_WILD 0xffffffff |
28 | |
48e2f01c |
29 | typedef struct m4af_sample_entry_t { |
30 | uint32_t size; |
31 | uint32_t delta; |
32 | } m4af_sample_entry_t; |
33 | |
34 | typedef struct m4af_chunk_entry_t { |
35 | int64_t offset; |
36 | uint32_t size; |
37 | uint32_t samples_per_chunk; |
38 | uint32_t duration; |
39 | } m4af_chunk_entry_t; |
40 | |
48e2f01c |
41 | typedef struct m4af_track_t { |
42 | uint32_t codec; |
43 | uint32_t timescale; |
44 | int64_t creation_time; |
45 | int64_t modification_time; |
46 | int64_t duration; |
47 | uint32_t frame_duration; |
48 | uint32_t encoder_delay; |
49 | uint32_t padding; |
50 | uint8_t *decSpecificInfo; |
51 | uint32_t decSpecificInfoSize; |
52 | uint32_t bufferSizeDB; |
53 | uint32_t maxBitrate; |
54 | uint32_t avgBitrate; |
55 | |
56 | m4af_sample_entry_t *sample_table; |
57 | uint32_t num_samples; |
58 | uint32_t sample_table_capacity; |
59 | |
60 | m4af_chunk_entry_t *chunk_table; |
61 | uint32_t num_chunks; |
62 | uint32_t chunk_table_capacity; |
63 | |
64 | uint8_t *chunk_buffer; |
65 | uint32_t chunk_size; |
66 | uint32_t chunk_capacity; |
e4bbeeb0 |
67 | |
68 | /* temporary, to help parsing */ |
69 | uint64_t stsc_pos; |
70 | uint64_t stsc_size; |
71 | |
72 | uint64_t stts_pos; |
73 | uint64_t stts_size; |
48e2f01c |
74 | } m4af_track_t; |
75 | |
e4bbeeb0 |
76 | struct m4af_ctx_t { |
48e2f01c |
77 | uint32_t timescale; |
78 | int64_t creation_time; |
79 | int64_t modification_time; |
80 | int64_t mdat_pos; |
81 | int64_t mdat_size; |
82 | int last_error; |
83 | |
84 | m4af_itmf_entry_t *itmf_table; |
85 | uint32_t num_tags; |
86 | uint32_t itmf_table_capacity; |
87 | |
88 | m4af_io_callbacks_t io; |
89 | void *io_cookie; |
90 | |
91 | uint16_t num_tracks; |
e4bbeeb0 |
92 | m4af_track_t track[2]; |
93 | |
94 | m4af_itmf_entry_t current_tag; |
48e2f01c |
95 | }; |
96 | |
e4bbeeb0 |
97 | typedef struct m4af_box_parser_t { |
98 | uint32_t name; |
99 | int (*handler)(m4af_ctx_t *ctx, uint32_t name, uint64_t size); |
100 | } m4af_box_parser_t; |
101 | |
48e2f01c |
102 | static |
103 | int64_t m4af_timestamp(void) |
104 | { |
105 | return (int64_t)(time(0)) + (((1970 - 1904) * 365) + 17) * 24 * 60 * 60; |
106 | } |
107 | |
108 | /* |
109 | * http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 |
110 | */ |
111 | static |
112 | uint32_t m4af_roundup(uint32_t n) |
113 | { |
114 | n--; |
115 | n |= n >> 1; |
116 | n |= n >> 2; |
117 | n |= n >> 4; |
118 | n |= n >> 8; |
119 | n |= n >> 16; |
120 | n++; |
121 | return n; |
122 | } |
123 | |
124 | static |
e4bbeeb0 |
125 | int64_t m4af_tell(m4af_ctx_t *ctx) |
48e2f01c |
126 | { |
127 | int64_t pos = -1; |
e4bbeeb0 |
128 | if ((pos = ctx->io.tell(ctx->io_cookie)) < 0) |
48e2f01c |
129 | ctx->last_error = M4AF_IO_ERROR; |
130 | return pos; |
131 | } |
132 | |
133 | static |
e4bbeeb0 |
134 | int m4af_set_pos(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c |
135 | { |
136 | int rc = -1; |
e4bbeeb0 |
137 | if ((rc = ctx->io.seek(ctx->io_cookie, pos, SEEK_SET)) < 0) |
48e2f01c |
138 | ctx->last_error = M4AF_IO_ERROR; |
139 | return rc; |
140 | } |
141 | |
142 | static |
e4bbeeb0 |
143 | int m4af_write(m4af_ctx_t *ctx, const void *data, uint32_t size) |
48e2f01c |
144 | { |
145 | int rc = -1; |
e4bbeeb0 |
146 | if ((rc = ctx->io.write(ctx->io_cookie, data, size)) < 0) |
48e2f01c |
147 | ctx->last_error = M4AF_IO_ERROR; |
148 | return rc; |
149 | } |
150 | |
151 | static |
e4bbeeb0 |
152 | int m4af_write32(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c |
153 | { |
154 | data = m4af_htob32(data); |
155 | return m4af_write(ctx, &data, 4); |
156 | } |
157 | |
158 | static |
e4bbeeb0 |
159 | int m4af_write64(m4af_ctx_t *ctx, uint64_t data) |
48e2f01c |
160 | { |
161 | data = m4af_htob64(data); |
162 | return m4af_write(ctx, &data, 8); |
163 | } |
164 | |
165 | static |
e4bbeeb0 |
166 | int m4af_write24(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c |
167 | { |
168 | data = m4af_htob32(data << 8); |
169 | return m4af_write(ctx, &data, 3); |
170 | } |
171 | |
172 | static |
e4bbeeb0 |
173 | void m4af_write32_at(m4af_ctx_t *ctx, int64_t pos, uint32_t value) |
48e2f01c |
174 | { |
175 | int64_t current_pos = m4af_tell(ctx); |
176 | m4af_set_pos(ctx, pos); |
177 | m4af_write32(ctx, value); |
178 | m4af_set_pos(ctx, current_pos); |
179 | } |
180 | |
e4bbeeb0 |
181 | m4af_ctx_t *m4af_create(uint32_t codec, uint32_t timescale, |
182 | m4af_io_callbacks_t *io, void *io_cookie) |
48e2f01c |
183 | { |
e4bbeeb0 |
184 | m4af_ctx_t *ctx; |
48e2f01c |
185 | int64_t timestamp; |
186 | |
187 | if (codec != M4AF_FOURCC('m','p','4','a') && |
188 | codec != M4AF_FOURCC('a','l','a','c')) |
189 | return 0; |
e4bbeeb0 |
190 | if ((ctx = m4af_realloc(0, sizeof(m4af_ctx_t))) == 0) |
48e2f01c |
191 | return 0; |
e4bbeeb0 |
192 | memset(ctx, 0, sizeof(m4af_ctx_t)); |
48e2f01c |
193 | memcpy(&ctx->io, io, sizeof(m4af_io_callbacks_t)); |
194 | ctx->io_cookie = io_cookie; |
195 | ctx->timescale = timescale; |
196 | timestamp = m4af_timestamp(); |
197 | ctx->creation_time = timestamp; |
198 | ctx->modification_time = timestamp; |
199 | ctx->num_tracks = 1; |
200 | ctx->track[0].codec = codec; |
201 | ctx->track[0].timescale = timescale; |
202 | ctx->track[0].creation_time = timestamp; |
203 | ctx->track[0].modification_time = timestamp; |
204 | return ctx; |
205 | } |
206 | |
e4bbeeb0 |
207 | static |
208 | void m4af_free_itmf_table(m4af_ctx_t *ctx) |
209 | { |
210 | uint32_t i; |
211 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
212 | for (i = 0; i < ctx->num_tags; ++i, ++entry) { |
213 | if (entry->fcc == M4AF_FOURCC('-','-','-','-')) |
214 | m4af_free(entry->name); |
215 | m4af_free(entry->data); |
216 | } |
217 | m4af_free(ctx->itmf_table); |
218 | } |
219 | |
220 | static |
221 | void m4af_clear_track(m4af_ctx_t *ctx, int track_idx) |
222 | { |
223 | m4af_track_t *track = ctx->track + track_idx; |
224 | if (track->decSpecificInfo) |
225 | m4af_free(track->decSpecificInfo); |
226 | if (track->sample_table) |
227 | m4af_free(track->sample_table); |
228 | if (track->chunk_table) |
229 | m4af_free(track->chunk_table); |
230 | if (track->chunk_buffer) |
231 | m4af_free(track->chunk_buffer); |
232 | memset(track, 0, sizeof(m4af_track_t)); |
233 | } |
234 | |
235 | void m4af_teardown(m4af_ctx_t **ctxp) |
236 | { |
237 | unsigned i; |
238 | m4af_ctx_t *ctx = *ctxp; |
239 | for (i = 0; i < ctx->num_tracks; ++i) |
240 | m4af_clear_track(ctx, i); |
241 | if (ctx->itmf_table) |
242 | m4af_free_itmf_table(ctx); |
243 | m4af_free(ctx); |
244 | *ctxp = 0; |
245 | } |
246 | |
247 | void m4af_set_fixed_frame_duration(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
248 | uint32_t length) |
249 | { |
250 | ctx->track[track_idx].frame_duration = length; |
251 | } |
252 | |
e4bbeeb0 |
253 | int m4af_set_decoder_specific_info(m4af_ctx_t *ctx, uint32_t track_idx, |
254 | uint8_t *data, uint32_t size) |
48e2f01c |
255 | { |
256 | m4af_track_t *track = &ctx->track[track_idx]; |
257 | if (size > track->decSpecificInfoSize) { |
258 | uint8_t *memory = m4af_realloc(track->decSpecificInfo, size); |
259 | if (memory == 0) { |
260 | ctx->last_error = M4AF_NO_MEMORY; |
e4bbeeb0 |
261 | goto DONE; |
48e2f01c |
262 | } |
263 | track->decSpecificInfo = memory; |
264 | } |
265 | if (size > 0) |
266 | memcpy(track->decSpecificInfo, data, size); |
267 | track->decSpecificInfoSize = size; |
e4bbeeb0 |
268 | DONE: |
269 | return ctx->last_error; |
48e2f01c |
270 | } |
271 | |
e4bbeeb0 |
272 | void m4af_set_priming(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
273 | uint32_t encoder_delay, uint32_t padding) |
274 | { |
275 | m4af_track_t *track = &ctx->track[track_idx]; |
276 | track->encoder_delay = encoder_delay; |
277 | track->padding = padding; |
278 | } |
279 | |
280 | static |
e4bbeeb0 |
281 | int m4af_add_sample_entry(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
282 | uint32_t size, uint32_t delta) |
283 | { |
284 | m4af_track_t *track = &ctx->track[track_idx]; |
285 | m4af_sample_entry_t *entry; |
286 | |
287 | if (ctx->last_error) |
288 | return -1; |
289 | if (track->num_samples == track->sample_table_capacity) { |
290 | uint32_t new_size = track->sample_table_capacity; |
291 | new_size = new_size ? new_size * 2 : 1; |
292 | entry = m4af_realloc(track->sample_table, new_size * sizeof(*entry)); |
293 | if (entry == 0) { |
294 | ctx->last_error = M4AF_NO_MEMORY; |
295 | return -1; |
296 | } |
297 | track->sample_table = entry; |
298 | track->sample_table_capacity = new_size; |
299 | } |
300 | entry = track->sample_table + track->num_samples; |
301 | entry->size = size; |
302 | entry->delta = delta; |
303 | ++track->num_samples; |
304 | return 0; |
305 | } |
306 | |
307 | static |
e4bbeeb0 |
308 | int m4af_flush_chunk(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
309 | { |
310 | m4af_track_t *track = &ctx->track[track_idx]; |
311 | m4af_chunk_entry_t *entry; |
312 | if (!track->num_chunks || !track->chunk_size) |
313 | return 0; |
314 | entry = &track->chunk_table[track->num_chunks - 1]; |
315 | entry->offset = m4af_tell(ctx); |
316 | m4af_write(ctx, track->chunk_buffer, track->chunk_size); |
317 | ctx->mdat_size += track->chunk_size; |
318 | track->chunk_size = 0; |
319 | return ctx->last_error ? -1 : 0; |
320 | } |
321 | |
322 | static |
e4bbeeb0 |
323 | int m4af_add_chunk_entry(m4af_ctx_t *ctx, uint32_t track_idx) |
324 | { |
325 | m4af_track_t *track = &ctx->track[track_idx]; |
326 | m4af_chunk_entry_t *entry; |
327 | if (track->num_chunks == track->chunk_table_capacity) { |
328 | uint32_t new_size = track->chunk_table_capacity; |
329 | new_size = new_size ? new_size * 2 : 1; |
330 | entry = m4af_realloc(track->chunk_table, new_size * sizeof(*entry)); |
331 | if (entry == 0) { |
332 | ctx->last_error = M4AF_NO_MEMORY; |
333 | return -1; |
334 | } |
335 | track->chunk_table = entry; |
336 | track->chunk_table_capacity = new_size; |
337 | } |
338 | memset(&track->chunk_table[track->num_chunks++], 0, |
339 | sizeof(m4af_chunk_entry_t)); |
340 | return 0; |
341 | } |
342 | |
343 | static |
344 | int m4af_update_chunk_table(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
345 | uint32_t size, uint32_t delta) |
346 | { |
347 | m4af_track_t *track = &ctx->track[track_idx]; |
348 | m4af_chunk_entry_t *entry; |
349 | int add_new_chunk = 0; |
350 | |
351 | if (ctx->last_error) |
352 | return -1; |
353 | if (track->num_chunks == 0) |
354 | add_new_chunk = 1; |
355 | else { |
356 | entry = &track->chunk_table[track->num_chunks - 1]; |
357 | if (entry->duration + delta > track->timescale / 2) |
358 | add_new_chunk = 1; |
359 | } |
360 | if (add_new_chunk) { |
361 | m4af_flush_chunk(ctx, track_idx); |
e4bbeeb0 |
362 | if (m4af_add_chunk_entry(ctx, track_idx) < 0) |
363 | return -1; |
48e2f01c |
364 | } |
365 | entry = &track->chunk_table[track->num_chunks - 1]; |
366 | entry->size += size; |
367 | ++entry->samples_per_chunk; |
368 | entry->duration += delta; |
369 | return 0; |
370 | } |
371 | |
372 | static |
e4bbeeb0 |
373 | void m4af_update_max_bitrate(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
374 | { |
375 | m4af_track_t *track = &ctx->track[track_idx]; |
376 | uint32_t duration = 0, size = 0, bitrate; |
377 | m4af_sample_entry_t *ent = track->sample_table + track->num_samples - 1; |
378 | |
379 | for (; ent >= track->sample_table && duration < track->timescale; --ent) { |
380 | duration += ent->delta; |
381 | size += ent->size; |
382 | } |
383 | bitrate = (uint32_t)(size * 8.0 * track->timescale / duration + .5); |
384 | if (bitrate > track->maxBitrate) |
385 | track->maxBitrate = bitrate; |
386 | } |
387 | |
388 | static |
e4bbeeb0 |
389 | int m4af_append_sample_to_chunk(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
390 | const void *data, uint32_t size) |
391 | { |
392 | m4af_track_t *track = &ctx->track[track_idx]; |
393 | uint32_t newsize = track->chunk_size + size; |
394 | |
395 | if (ctx->last_error) |
396 | return -1; |
397 | if (track->chunk_capacity < newsize) { |
398 | uint32_t capacity = m4af_roundup(newsize); |
399 | uint8_t *memory = realloc(track->chunk_buffer, capacity); |
400 | if (!memory) { |
401 | ctx->last_error = M4AF_NO_MEMORY; |
402 | return -1; |
403 | } |
404 | track->chunk_buffer = memory; |
405 | track->chunk_capacity = capacity; |
406 | } |
407 | memcpy(track->chunk_buffer + track->chunk_size, data, size); |
408 | track->chunk_size = newsize; |
409 | return 0; |
410 | } |
411 | |
e4bbeeb0 |
412 | int m4af_write_sample(m4af_ctx_t *ctx, uint32_t track_idx, const void *data, |
48e2f01c |
413 | uint32_t size, uint32_t duration) |
414 | { |
415 | m4af_track_t *track = &ctx->track[track_idx]; |
416 | if (track->frame_duration) |
417 | duration = track->frame_duration; |
418 | if (size > track->bufferSizeDB) |
419 | track->bufferSizeDB = size; |
420 | track->duration += duration; |
421 | m4af_add_sample_entry(ctx, track_idx, size, duration); |
422 | m4af_update_chunk_table(ctx, track_idx, size, duration); |
423 | m4af_update_max_bitrate(ctx, track_idx); |
424 | m4af_append_sample_to_chunk(ctx, track_idx, data, size); |
e4bbeeb0 |
425 | return ctx->last_error; |
48e2f01c |
426 | } |
427 | |
428 | static |
93fb917b |
429 | m4af_itmf_entry_t *m4af_find_itmf_slot(m4af_ctx_t *ctx, uint32_t fcc, |
430 | const char *name) |
48e2f01c |
431 | { |
93fb917b |
432 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
433 | |
434 | if (name) |
435 | fcc = M4AF_FOURCC('-','-','-','-'); |
436 | |
437 | if (fcc != M4AF_TAG_ARTWORK) |
438 | for (; entry != ctx->itmf_table + ctx->num_tags; ++entry) |
439 | if (fcc == entry->fcc && (!name || !strcmp(name, entry->name))) |
440 | return entry; |
441 | |
48e2f01c |
442 | if (ctx->num_tags == ctx->itmf_table_capacity) { |
443 | uint32_t new_size = ctx->itmf_table_capacity; |
444 | new_size = new_size ? new_size * 2 : 1; |
445 | entry = m4af_realloc(ctx->itmf_table, new_size * sizeof(*entry)); |
446 | if (entry == 0) { |
447 | ctx->last_error = M4AF_NO_MEMORY; |
93fb917b |
448 | return 0; |
48e2f01c |
449 | } |
450 | ctx->itmf_table = entry; |
451 | ctx->itmf_table_capacity = new_size; |
452 | } |
93fb917b |
453 | entry = &ctx->itmf_table[ctx->num_tags++]; |
454 | memset(entry, 0, sizeof(m4af_itmf_entry_t)); |
455 | entry->fcc = fcc; |
456 | if (name) { |
457 | char *name_copy = m4af_realloc(0, strlen(name) + 1); |
458 | if (!name_copy) { |
459 | ctx->last_error = M4AF_NO_MEMORY; |
460 | --ctx->num_tags; |
461 | return 0; |
462 | } |
463 | strcpy(name_copy, name); |
464 | entry->name = name_copy; |
465 | } |
466 | return entry; |
48e2f01c |
467 | } |
468 | |
e4bbeeb0 |
469 | int m4af_add_itmf_long_tag(m4af_ctx_t *ctx, const char *name, |
48e2f01c |
470 | const char *data) |
471 | { |
472 | m4af_itmf_entry_t *entry; |
93fb917b |
473 | char *data_copy = 0; |
48e2f01c |
474 | size_t name_len = strlen(name); |
475 | size_t data_len = strlen(data); |
93fb917b |
476 | if (!name_len || !data_len) |
477 | return 0; |
478 | |
479 | if ((entry = m4af_find_itmf_slot(ctx, 0, name)) == 0) |
480 | goto FAIL; |
481 | entry->type_code = M4AF_UTF8; |
482 | if ((data_copy = m4af_realloc(entry->data, data_len)) == 0) { |
48e2f01c |
483 | ctx->last_error = M4AF_NO_MEMORY; |
484 | goto FAIL; |
485 | } |
48e2f01c |
486 | memcpy(data_copy, data, data_len); |
48e2f01c |
487 | entry->data = data_copy; |
488 | entry->data_size = data_len; |
489 | return 0; |
490 | FAIL: |
e4bbeeb0 |
491 | return ctx->last_error; |
48e2f01c |
492 | } |
493 | |
e4bbeeb0 |
494 | int m4af_add_itmf_short_tag(m4af_ctx_t *ctx, uint32_t fcc, |
48e2f01c |
495 | uint32_t type_code, const void *data, |
496 | uint32_t data_size) |
497 | { |
498 | m4af_itmf_entry_t *entry; |
93fb917b |
499 | char *data_copy = 0; |
500 | |
501 | if (!data_size) |
502 | return 0; |
503 | if ((entry = m4af_find_itmf_slot(ctx, fcc, 0)) == 0) |
504 | goto FAIL; |
505 | entry->type_code = type_code; |
506 | if ((data_copy = m4af_realloc(entry->data, data_size)) == 0) { |
48e2f01c |
507 | ctx->last_error = M4AF_NO_MEMORY; |
508 | goto FAIL; |
509 | } |
48e2f01c |
510 | memcpy(data_copy, data, data_size); |
511 | entry->data = data_copy; |
512 | entry->data_size = data_size; |
513 | return 0; |
514 | FAIL: |
e4bbeeb0 |
515 | return ctx->last_error; |
48e2f01c |
516 | } |
517 | |
e4bbeeb0 |
518 | int m4af_add_itmf_string_tag(m4af_ctx_t *ctx, uint32_t fcc, const char *data) |
48e2f01c |
519 | { |
e4bbeeb0 |
520 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_UTF8, data, strlen(data)); |
48e2f01c |
521 | } |
522 | |
e4bbeeb0 |
523 | int m4af_add_itmf_int8_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c |
524 | { |
525 | uint8_t data = value; |
e4bbeeb0 |
526 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 1); |
48e2f01c |
527 | } |
528 | |
e4bbeeb0 |
529 | int m4af_add_itmf_int16_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c |
530 | { |
531 | uint16_t data = m4af_htob16(value); |
e4bbeeb0 |
532 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 2); |
48e2f01c |
533 | } |
534 | |
e4bbeeb0 |
535 | int m4af_add_itmf_int32_tag(m4af_ctx_t *ctx, uint32_t fcc, uint32_t value) |
48e2f01c |
536 | { |
537 | uint32_t data = m4af_htob32(value); |
e4bbeeb0 |
538 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 4); |
48e2f01c |
539 | } |
540 | |
e4bbeeb0 |
541 | int m4af_add_itmf_int64_tag(m4af_ctx_t *ctx, uint32_t fcc, uint64_t value) |
c5c45908 |
542 | { |
543 | uint64_t data = m4af_htob64(value); |
e4bbeeb0 |
544 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 8); |
c5c45908 |
545 | } |
546 | |
e4bbeeb0 |
547 | int m4af_add_itmf_track_tag(m4af_ctx_t *ctx, int track, int total) |
48e2f01c |
548 | { |
549 | uint16_t data[4] = { 0 }; |
550 | data[1] = m4af_htob16(track); |
551 | data[2] = m4af_htob16(total); |
552 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('t','r','k','n'), |
553 | M4AF_IMPLICIT, &data, 8); |
554 | } |
555 | |
e4bbeeb0 |
556 | int m4af_add_itmf_disk_tag(m4af_ctx_t *ctx, int disk, int total) |
48e2f01c |
557 | { |
558 | uint16_t data[3] = { 0 }; |
559 | data[1] = m4af_htob16(disk); |
560 | data[2] = m4af_htob16(total); |
561 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('d','i','s','k'), |
562 | M4AF_IMPLICIT, &data, 6); |
563 | } |
564 | |
e4bbeeb0 |
565 | int m4af_add_itmf_genre_tag(m4af_ctx_t *ctx, int genre) |
48e2f01c |
566 | { |
567 | uint16_t data = m4af_htob16(genre); |
568 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('g','n','r','e'), |
569 | M4AF_IMPLICIT, &data, 2); |
570 | } |
571 | |
572 | static |
e4bbeeb0 |
573 | int m4af_set_iTunSMPB(m4af_ctx_t *ctx) |
48e2f01c |
574 | { |
e4bbeeb0 |
575 | const char *fmt = " 00000000 %08X %08X %08X%08X 00000000 00000000 " |
48e2f01c |
576 | "00000000 00000000 00000000 00000000 00000000 00000000"; |
577 | m4af_track_t *track = &ctx->track[0]; |
578 | char buf[256]; |
579 | uint64_t length = track->duration - track->encoder_delay - track->padding; |
e4bbeeb0 |
580 | sprintf(buf, fmt, track->encoder_delay, track->padding, |
48e2f01c |
581 | (uint32_t)(length >> 32), (uint32_t)length); |
582 | return m4af_add_itmf_long_tag(ctx, "iTunSMPB", buf); |
583 | } |
584 | |
585 | static |
e4bbeeb0 |
586 | void m4af_update_box_size(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c |
587 | { |
588 | int64_t current_pos = m4af_tell(ctx); |
589 | m4af_set_pos(ctx, pos); |
590 | m4af_write32(ctx, current_pos - pos); |
591 | m4af_set_pos(ctx, current_pos); |
592 | } |
593 | |
48e2f01c |
594 | static |
e4bbeeb0 |
595 | void m4af_write_descriptor(m4af_ctx_t *ctx, uint32_t tag, uint32_t size) |
48e2f01c |
596 | { |
597 | uint8_t buf[5]; |
598 | buf[0] = tag; |
599 | buf[1] = ((size >> 21) | 0x80); |
600 | buf[2] = ((size >> 14) | 0x80); |
601 | buf[3] = ((size >> 7) | 0x80); |
602 | buf[4] = (size & 0x7f); |
603 | m4af_write(ctx, buf, 5); |
604 | } |
605 | |
606 | static |
e4bbeeb0 |
607 | void m4af_write_ftyp_box(m4af_ctx_t *ctx) |
48e2f01c |
608 | { |
609 | m4af_write(ctx, "\0\0\0\040""ftypM4A \0\0\0\0M4A mp42isom\0\0\0\0", 32); |
610 | } |
611 | |
612 | static |
e4bbeeb0 |
613 | void m4af_write_free_box(m4af_ctx_t *ctx, uint32_t size) |
48e2f01c |
614 | { |
615 | int64_t pos = m4af_tell(ctx); |
616 | m4af_write32(ctx, size + 8); |
617 | m4af_write(ctx, "free", 4); |
618 | if (size > 0) |
619 | m4af_set_pos(ctx, pos + size + 8); |
620 | } |
621 | |
e4bbeeb0 |
622 | int m4af_begin_write(m4af_ctx_t *ctx) |
48e2f01c |
623 | { |
e4bbeeb0 |
624 | m4af_write_ftyp_box(ctx); |
625 | m4af_write_free_box(ctx, 0); |
48e2f01c |
626 | m4af_write(ctx, "\0\0\0\0mdat", 8); |
627 | ctx->mdat_pos = m4af_tell(ctx); |
e4bbeeb0 |
628 | return ctx->last_error; |
48e2f01c |
629 | } |
630 | |
631 | static |
e4bbeeb0 |
632 | void m4af_write_stco_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
633 | { |
634 | m4af_track_t *track = &ctx->track[track_idx]; |
635 | uint32_t i; |
636 | m4af_chunk_entry_t *index = track->chunk_table; |
637 | int is_co64 = (ctx->mdat_pos + ctx->mdat_size > UINT32_MAX); |
638 | int64_t pos = m4af_tell(ctx); |
639 | |
640 | m4af_write32(ctx, 0); /* size */ |
641 | m4af_write(ctx, is_co64 ? "co64" : "stco", 4); |
642 | m4af_write32(ctx, 0); /* version and flags */ |
643 | m4af_write32(ctx, track->num_chunks); |
644 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
645 | if (is_co64) |
646 | m4af_write64(ctx, index->offset); |
647 | else |
648 | m4af_write32(ctx, index->offset); |
649 | } |
e4bbeeb0 |
650 | m4af_update_box_size(ctx, pos); |
48e2f01c |
651 | } |
652 | |
653 | static |
e4bbeeb0 |
654 | void m4af_write_stsz_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
655 | { |
656 | m4af_track_t *track = &ctx->track[track_idx]; |
657 | m4af_sample_entry_t *index = track->sample_table; |
658 | uint32_t i; |
659 | int64_t pos = m4af_tell(ctx); |
660 | m4af_write(ctx, |
661 | "\0\0\0\0" /* size */ |
662 | "stsz" /* type */ |
663 | "\0" /* version */ |
664 | "\0\0\0" /* flags */ |
665 | "\0\0\0\0" /* sample_size: 0(variable) */ |
666 | , 16); |
667 | m4af_write32(ctx, track->num_samples); |
668 | for (i = 0; i < track->num_samples; ++i, ++index) |
669 | m4af_write32(ctx, index->size); |
e4bbeeb0 |
670 | m4af_update_box_size(ctx, pos); |
48e2f01c |
671 | } |
672 | |
673 | static |
e4bbeeb0 |
674 | void m4af_write_stsc_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
675 | { |
676 | m4af_track_t *track = &ctx->track[track_idx]; |
677 | m4af_chunk_entry_t *index = track->chunk_table; |
678 | uint32_t i, prev_samples_per_chunk = 0, entry_count = 0; |
679 | int64_t pos = m4af_tell(ctx); |
680 | m4af_write(ctx, |
681 | "\0\0\0\0" /* size */ |
682 | "stsc" /* type */ |
683 | "\0" /* version */ |
684 | "\0\0\0" /* flags */ |
685 | "\0\0\0\0" /* entry_count */ |
686 | , 16); |
687 | |
688 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
689 | if (index->samples_per_chunk != prev_samples_per_chunk) { |
690 | ++entry_count; |
691 | m4af_write32(ctx, i + 1); |
692 | m4af_write32(ctx, index->samples_per_chunk); |
693 | m4af_write32(ctx, 1); /* sample_description_index */ |
694 | prev_samples_per_chunk = index->samples_per_chunk; |
695 | } |
696 | } |
697 | m4af_write32_at(ctx, pos + 12, entry_count); |
e4bbeeb0 |
698 | m4af_update_box_size(ctx, pos); |
48e2f01c |
699 | } |
700 | |
701 | static |
e4bbeeb0 |
702 | void m4af_write_stts_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
703 | { |
704 | m4af_track_t *track = &ctx->track[track_idx]; |
705 | m4af_sample_entry_t *index = track->sample_table; |
706 | uint32_t i, prev_delta = 0, entry_count = 0, sample_count = 0; |
707 | int64_t pos = m4af_tell(ctx); |
708 | m4af_write(ctx, |
709 | "\0\0\0\0" /* size */ |
710 | "stts" /* type */ |
711 | "\0" /* version */ |
712 | "\0\0\0" /* flags */ |
713 | "\0\0\0\0" /* entry_count */ |
714 | , 16); |
715 | |
716 | for (i = 0; i < track->num_samples; ++i, ++index) { |
717 | if (index->delta == prev_delta) |
718 | ++sample_count; |
719 | else { |
720 | ++entry_count; |
721 | if (sample_count) { |
722 | m4af_write32(ctx, sample_count); |
723 | m4af_write32(ctx, prev_delta); |
724 | } |
725 | prev_delta = index->delta; |
726 | sample_count = 1; |
727 | } |
728 | } |
729 | if (sample_count) { |
730 | m4af_write32(ctx, sample_count); |
731 | m4af_write32(ctx, prev_delta); |
732 | } |
733 | m4af_write32_at(ctx, pos + 12, entry_count); |
e4bbeeb0 |
734 | m4af_update_box_size(ctx, pos); |
48e2f01c |
735 | } |
736 | |
737 | static |
e4bbeeb0 |
738 | void m4af_write_esds_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
739 | { |
740 | m4af_track_t *track = &ctx->track[track_idx]; |
741 | int64_t pos = m4af_tell(ctx); |
742 | m4af_write(ctx, "\0\0\0\0esds", 8); |
743 | m4af_write32(ctx, 0); /* version + flags */ |
744 | |
745 | /* ES_Descriptor */ |
e4bbeeb0 |
746 | m4af_write_descriptor(ctx, 3, 32 + track->decSpecificInfoSize); |
48e2f01c |
747 | m4af_write(ctx, "\0\0\0", 3); |
748 | /* DecoderConfigDescriptor */ |
e4bbeeb0 |
749 | m4af_write_descriptor(ctx, 4, 18 + track->decSpecificInfoSize); |
48e2f01c |
750 | m4af_write(ctx, |
751 | "\x40" /* objectTypeIndication: 0x40(Audio ISO/IEC 14496-3)*/ |
752 | "\x15" /* streamType(6): 0x05(AudioStream) |
753 | * upStream(1) : 0 |
754 | * reserved(1) : 1 |
755 | */ |
756 | , 2); |
757 | m4af_write24(ctx, track->bufferSizeDB); |
758 | m4af_write32(ctx, track->maxBitrate); |
759 | m4af_write32(ctx, track->avgBitrate); |
760 | /* DecoderSpecificInfo */ |
e4bbeeb0 |
761 | m4af_write_descriptor(ctx, 5, track->decSpecificInfoSize); |
48e2f01c |
762 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
763 | /* SLConfigDescriptor */ |
e4bbeeb0 |
764 | m4af_write_descriptor(ctx, 6, 1); |
48e2f01c |
765 | m4af_write(ctx, "\002", 1); /* predefined */ |
766 | |
e4bbeeb0 |
767 | m4af_update_box_size(ctx, pos); |
48e2f01c |
768 | } |
769 | |
770 | static |
e4bbeeb0 |
771 | void m4af_write_alac_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
772 | { |
773 | m4af_track_t *track = &ctx->track[track_idx]; |
774 | int64_t pos = m4af_tell(ctx); |
775 | m4af_write(ctx, |
776 | "\0\0\0\0" /* size */ |
777 | "alac" /* type */ |
778 | "\0" /* version */ |
779 | "\0\0\0" /* flags */ |
780 | , 12); |
781 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
e4bbeeb0 |
782 | m4af_update_box_size(ctx, pos); |
48e2f01c |
783 | } |
784 | |
785 | static |
e4bbeeb0 |
786 | void m4af_write_mp4a_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
787 | { |
788 | m4af_track_t *track = &ctx->track[track_idx]; |
789 | int64_t pos = m4af_tell(ctx); |
790 | m4af_write32(ctx, 0); /* size */ |
791 | m4af_write32(ctx, track->codec); /* mp4a or alac */ |
792 | m4af_write(ctx, |
793 | "\0\0\0\0\0\0" /* reserved */ |
794 | "\0\001" /* data_reference_index: 1 */ |
795 | "\0\0\0\0" /* reserved[0] */ |
796 | "\0\0\0\0" /* reserved[1] */ |
797 | "\0\002" /* channelcount: 2 */ |
798 | "\0\020" /* samplesize: 16 */ |
799 | "\0\0" /* pre_defined */ |
800 | "\0\0" /* reserved */ |
801 | ,24); |
802 | if (track->codec == M4AF_FOURCC('m','p','4','a')) { |
803 | m4af_write32(ctx, track->timescale << 16); |
e4bbeeb0 |
804 | m4af_write_esds_box(ctx, track_idx); |
48e2f01c |
805 | } else { |
e4bbeeb0 |
806 | m4af_write32(ctx, 44100 << 16); |
807 | m4af_write_alac_box(ctx, track_idx); |
48e2f01c |
808 | } |
e4bbeeb0 |
809 | m4af_update_box_size(ctx, pos); |
48e2f01c |
810 | } |
811 | |
812 | static |
e4bbeeb0 |
813 | void m4af_write_stsd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
814 | { |
815 | int64_t pos = m4af_tell(ctx); |
816 | m4af_write(ctx, "\0\0\0\0stsd", 8); |
817 | m4af_write(ctx, |
818 | "\0" /* version */ |
819 | "\0\0\0" /* flags */ |
820 | "\0\0\0\001" /* entry_count: 1 */ |
821 | , 8); |
e4bbeeb0 |
822 | m4af_write_mp4a_box(ctx, track_idx); |
823 | m4af_update_box_size(ctx, pos); |
48e2f01c |
824 | } |
825 | |
826 | static |
e4bbeeb0 |
827 | void m4af_write_stbl_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
828 | { |
829 | int64_t pos = m4af_tell(ctx); |
830 | m4af_write(ctx, "\0\0\0\0stbl", 8); |
e4bbeeb0 |
831 | m4af_write_stsd_box(ctx, track_idx); |
832 | m4af_write_stts_box(ctx, track_idx); |
833 | m4af_write_stsc_box(ctx, track_idx); |
834 | m4af_write_stsz_box(ctx, track_idx); |
835 | m4af_write_stco_box(ctx, track_idx); |
836 | m4af_update_box_size(ctx, pos); |
48e2f01c |
837 | } |
838 | |
839 | static |
e4bbeeb0 |
840 | void m4af_write_url_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
841 | { |
842 | m4af_write(ctx, |
843 | "\0\0\0\014" /* size */ |
844 | "url " /* type */ |
845 | "\0" /* version */ |
846 | "\0\0\001" /* flags: 1(in the same file) */ |
847 | , 12); |
848 | } |
849 | |
850 | static |
e4bbeeb0 |
851 | void m4af_write_dref_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
852 | { |
853 | int64_t pos = m4af_tell(ctx); |
854 | m4af_write(ctx, "\0\0\0\0dref", 8); |
855 | m4af_write(ctx, |
856 | "\0" /* version */ |
857 | "\0\0\0" /* flags */ |
858 | "\0\0\0\001" /* entry_count: 1 */ |
859 | ,8); |
e4bbeeb0 |
860 | m4af_write_url_box(ctx, track_idx); |
861 | m4af_update_box_size(ctx, pos); |
48e2f01c |
862 | } |
863 | |
864 | static |
e4bbeeb0 |
865 | void m4af_write_dinf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
866 | { |
867 | int64_t pos = m4af_tell(ctx); |
868 | m4af_write(ctx, "\0\0\0\0dinf", 8); |
e4bbeeb0 |
869 | m4af_write_dref_box(ctx, track_idx); |
870 | m4af_update_box_size(ctx, pos); |
48e2f01c |
871 | } |
872 | |
873 | static |
e4bbeeb0 |
874 | void m4af_write_smhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
875 | { |
876 | m4af_write(ctx, |
877 | "\0\0\0\020" /* size */ |
878 | "smhd" /* type */ |
879 | "\0" /* version */ |
880 | "\0\0\0" /* flags */ |
881 | "\0\0" /* balance */ |
882 | "\0\0" /* reserved */ |
883 | , 16); |
884 | } |
885 | |
886 | static |
e4bbeeb0 |
887 | void m4af_write_minf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
888 | { |
889 | m4af_track_t *track = &ctx->track[track_idx]; |
890 | int64_t pos = m4af_tell(ctx); |
891 | m4af_write(ctx, "\0\0\0\0minf", 8); |
892 | /* TODO: add TEXT support */ |
893 | if (track->codec != M4AF_CODEC_TEXT) |
e4bbeeb0 |
894 | m4af_write_smhd_box(ctx, track_idx); |
895 | m4af_write_dinf_box(ctx, track_idx); |
896 | m4af_write_stbl_box(ctx, track_idx); |
897 | m4af_update_box_size(ctx, pos); |
48e2f01c |
898 | } |
899 | |
900 | static |
e4bbeeb0 |
901 | void m4af_write_mdhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
902 | { |
903 | m4af_track_t *track = &ctx->track[track_idx]; |
904 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
905 | uint8_t version = (track->creation_time > UINT32_MAX || |
906 | track->modification_time > UINT32_MAX || |
907 | track->duration > UINT32_MAX); |
48e2f01c |
908 | |
909 | m4af_write(ctx, "\0\0\0\0mdhd", 8); |
910 | m4af_write(ctx, &version, 1); |
911 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
912 | if (version) { |
913 | m4af_write64(ctx, track->creation_time); |
914 | m4af_write64(ctx, track->modification_time); |
915 | m4af_write32(ctx, track->timescale); |
916 | m4af_write64(ctx, track->duration); |
917 | } else { |
918 | m4af_write32(ctx, track->creation_time); |
919 | m4af_write32(ctx, track->modification_time); |
920 | m4af_write32(ctx, track->timescale); |
921 | m4af_write32(ctx, track->duration); |
922 | } |
923 | m4af_write(ctx, |
924 | "\x55\xc4" /* language: und */ |
925 | "\0\0" /* pre_defined */ |
926 | , 4); |
e4bbeeb0 |
927 | m4af_update_box_size(ctx, pos); |
48e2f01c |
928 | } |
929 | |
930 | static |
e4bbeeb0 |
931 | void m4af_write_hdlr_box(m4af_ctx_t *ctx, uint32_t track_idx, const char *type) |
48e2f01c |
932 | { |
933 | int64_t pos = m4af_tell(ctx); |
934 | static const char reserved_and_name[10] = { 0 }; |
935 | |
936 | m4af_write(ctx, |
937 | "\0\0\0\0" /* size */ |
938 | "hdlr" /* type */ |
939 | "\0" /* version */ |
940 | "\0\0\0" /* flags */ |
941 | "\0\0\0\0" /* pre_defined */ |
942 | , 16); |
943 | m4af_write(ctx, type, 4); /* handler_type */ |
944 | /* reserved[0] */ |
945 | m4af_write(ctx, !strcmp(type, "mdir") ? "appl" : "\0\0\0\0", 4); |
946 | /* reserved[1], reserved[2], name */ |
947 | m4af_write(ctx, reserved_and_name, (pos & 1) ? 9 : 10); |
e4bbeeb0 |
948 | m4af_update_box_size(ctx, pos); |
48e2f01c |
949 | } |
950 | |
951 | static |
e4bbeeb0 |
952 | void m4af_write_mdia_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
953 | { |
954 | m4af_track_t *track = &ctx->track[track_idx]; |
955 | const char *hdlr = |
956 | (track->codec == M4AF_CODEC_TEXT) ? "text" : "soun"; |
957 | int64_t pos = m4af_tell(ctx); |
958 | m4af_write(ctx, "\0\0\0\0mdia", 8); |
e4bbeeb0 |
959 | m4af_write_mdhd_box(ctx, track_idx); |
960 | m4af_write_hdlr_box(ctx, track_idx, hdlr); |
961 | m4af_write_minf_box(ctx, track_idx); |
962 | m4af_update_box_size(ctx, pos); |
48e2f01c |
963 | } |
964 | |
965 | static |
e4bbeeb0 |
966 | void m4af_write_tkhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
967 | { |
968 | m4af_track_t *track = &ctx->track[track_idx]; |
969 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
970 | int64_t duration = |
971 | (double)track->duration / track->timescale * ctx->timescale + .5; |
972 | uint8_t version = (track->creation_time > UINT32_MAX || |
973 | track->modification_time > UINT32_MAX || |
974 | duration > UINT32_MAX); |
48e2f01c |
975 | m4af_write(ctx, "\0\0\0\0tkhd", 8); |
976 | m4af_write(ctx, &version, 1); |
977 | m4af_write(ctx, "\0\0\007", 3); /* flags */ |
978 | if (version) { |
979 | m4af_write64(ctx, track->creation_time); |
980 | m4af_write64(ctx, track->modification_time); |
981 | m4af_write32(ctx, track_idx + 1); |
982 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
983 | , 4); |
f67cfe22 |
984 | m4af_write64(ctx, duration); |
48e2f01c |
985 | } else { |
986 | m4af_write32(ctx, track->creation_time); |
987 | m4af_write32(ctx, track->modification_time); |
988 | m4af_write32(ctx, track_idx + 1); |
989 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
990 | , 4); |
f67cfe22 |
991 | m4af_write32(ctx, duration); |
48e2f01c |
992 | } |
993 | m4af_write(ctx, |
994 | "\0\0\0\0" /* reserved[0] */ |
995 | "\0\0\0\0" /* reserved[1] */ |
996 | "\0\0" /* layer */ |
997 | "\0\0" /* alternate_group */ |
998 | "\001\0" /* volume: 1.0 */ |
999 | "\0\0" /* reserved */ |
1000 | "\0\001\0\0" /* matrix[0] */ |
1001 | "\0\0\0\0" /* matrix[1] */ |
1002 | "\0\0\0\0" /* matrix[2] */ |
1003 | "\0\0\0\0" /* matrix[3] */ |
1004 | "\0\001\0\0" /* matrix[4] */ |
1005 | "\0\0\0\0" /* matrix[5] */ |
1006 | "\0\0\0\0" /* matrix[6] */ |
1007 | "\0\0\0\0" /* matrix[7] */ |
1008 | "\100\0\0\0" /* matrix[8] */ |
1009 | "\0\0\0\0" /* width */ |
1010 | "\0\0\0\0" /* height */ |
1011 | , 60); |
e4bbeeb0 |
1012 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1013 | } |
1014 | |
1015 | static |
e4bbeeb0 |
1016 | void m4af_write_trak_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
1017 | { |
1018 | int64_t pos = m4af_tell(ctx); |
1019 | m4af_write(ctx, "\0\0\0\0trak", 8); |
e4bbeeb0 |
1020 | m4af_write_tkhd_box(ctx, track_idx); |
1021 | m4af_write_mdia_box(ctx, track_idx); |
1022 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1023 | } |
1024 | |
1025 | static |
e4bbeeb0 |
1026 | int64_t m4af_movie_duration(m4af_ctx_t *ctx) |
48e2f01c |
1027 | { |
1028 | int64_t movie_duration = 0; |
1029 | unsigned i; |
1030 | for (i = 0; i < ctx->num_tracks; ++i) { |
1031 | double x = ctx->track[i].duration; |
f67cfe22 |
1032 | int64_t duration = x / ctx->track[i].timescale * ctx->timescale + .5; |
48e2f01c |
1033 | if (duration > movie_duration) |
1034 | movie_duration = duration; |
1035 | } |
1036 | return movie_duration; |
1037 | } |
1038 | |
1039 | static |
e4bbeeb0 |
1040 | void m4af_write_mvhd_box(m4af_ctx_t *ctx) |
48e2f01c |
1041 | { |
1042 | int64_t pos = m4af_tell(ctx); |
48e2f01c |
1043 | int64_t movie_duration = m4af_movie_duration(ctx); |
f67cfe22 |
1044 | uint8_t version = (ctx->creation_time > UINT32_MAX || |
1045 | ctx->modification_time > UINT32_MAX || |
1046 | movie_duration > UINT32_MAX); |
48e2f01c |
1047 | |
1048 | m4af_write(ctx, "\0\0\0\0mvhd", 8); |
1049 | m4af_write(ctx, &version, 1); |
1050 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
1051 | if (version) { |
1052 | m4af_write64(ctx, ctx->creation_time); |
1053 | m4af_write64(ctx, ctx->modification_time); |
1054 | m4af_write32(ctx, ctx->timescale); |
1055 | m4af_write64(ctx, movie_duration); |
1056 | } else { |
1057 | m4af_write32(ctx, ctx->creation_time); |
1058 | m4af_write32(ctx, ctx->modification_time); |
1059 | m4af_write32(ctx, ctx->timescale); |
1060 | m4af_write32(ctx, movie_duration); |
1061 | } |
1062 | m4af_write(ctx, |
1063 | "\0\001\0\0" /* rate: 1.0 */ |
1064 | "\001\0" /* volume: 1.0 */ |
1065 | "\0\0" /* reserved */ |
1066 | "\0\0\0\0" /* reserved[0] */ |
1067 | "\0\0\0\0" /* reserved[1] */ |
1068 | "\0\001\0\0" /* matrix[0] */ |
1069 | "\0\0\0\0" /* matrix[1] */ |
1070 | "\0\0\0\0" /* matrix[2] */ |
1071 | "\0\0\0\0" /* matrix[3] */ |
1072 | "\0\001\0\0" /* matrix[4] */ |
1073 | "\0\0\0\0" /* matrix[5] */ |
1074 | "\0\0\0\0" /* matrix[6] */ |
1075 | "\0\0\0\0" /* matrix[7] */ |
1076 | "\100\0\0\0" /* matrix[8] */ |
1077 | "\0\0\0\0" /* pre_defined[0] */ |
1078 | "\0\0\0\0" /* pre_defined[1] */ |
1079 | "\0\0\0\0" /* pre_defined[2] */ |
1080 | "\0\0\0\0" /* pre_defined[3] */ |
1081 | "\0\0\0\0" /* pre_defined[4] */ |
1082 | "\0\0\0\0" /* pre_defined[5] */ |
1083 | , 76); |
1084 | m4af_write32(ctx, ctx->num_tracks + 1); |
e4bbeeb0 |
1085 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1086 | } |
1087 | |
1088 | static |
e4bbeeb0 |
1089 | void m4af_write_mean_box(m4af_ctx_t *ctx) |
48e2f01c |
1090 | { |
1091 | m4af_write(ctx, |
1092 | "\0\0\0\034" /* size */ |
1093 | "mean" |
1094 | "\0" /* version */ |
1095 | "\0\0\0" /* flags */ |
1096 | "com.apple.iTunes" /* meaning-string */ |
1097 | , 28); |
1098 | } |
1099 | |
1100 | static |
e4bbeeb0 |
1101 | void m4af_write_name_box(m4af_ctx_t *ctx, const char *name) |
48e2f01c |
1102 | { |
1103 | int64_t pos = m4af_tell(ctx); |
1104 | m4af_write(ctx, |
1105 | "\0\0\0\0" /* size */ |
1106 | "name" /* type */ |
1107 | "\0" /* version */ |
1108 | "\0\0\0" /* flags */ |
1109 | , 12); |
1110 | m4af_write(ctx, name, strlen(name)); |
e4bbeeb0 |
1111 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1112 | } |
1113 | |
1114 | static |
e4bbeeb0 |
1115 | void m4af_write_data_box(m4af_ctx_t *ctx, uint32_t type_code, |
1116 | const char *data, uint32_t data_size) |
48e2f01c |
1117 | { |
1118 | int64_t pos = m4af_tell(ctx); |
1119 | uint8_t code = type_code; |
1120 | m4af_write(ctx, |
1121 | "\0\0\0\0" /* size */ |
1122 | "data" /* type */ |
1123 | "\0\0" /* reserved */ |
1124 | "\0" /* type_set_indifier */ |
1125 | ,11); |
1126 | m4af_write(ctx, &code, 1); |
1127 | m4af_write(ctx, "\0\0\0\0", 4); /* locale */ |
1128 | m4af_write(ctx, data, data_size); |
e4bbeeb0 |
1129 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1130 | } |
1131 | |
1132 | static |
e4bbeeb0 |
1133 | void m4af_write_metadata(m4af_ctx_t *ctx, m4af_itmf_entry_t *entry) |
48e2f01c |
1134 | { |
1135 | int64_t pos = m4af_tell(ctx); |
1136 | m4af_write(ctx, "\0\0\0\0", 4); |
e4bbeeb0 |
1137 | m4af_write32(ctx, entry->fcc); |
1138 | if (entry->fcc != M4AF_FOURCC('-','-','-','-')) |
1139 | m4af_write_data_box(ctx, entry->type_code, |
1140 | entry->data, entry->data_size); |
48e2f01c |
1141 | else { |
e4bbeeb0 |
1142 | m4af_write_mean_box(ctx); |
1143 | m4af_write_name_box(ctx, entry->name); |
1144 | m4af_write_data_box(ctx, 1, entry->data, entry->data_size); |
48e2f01c |
1145 | } |
e4bbeeb0 |
1146 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1147 | } |
1148 | |
1149 | static |
e4bbeeb0 |
1150 | void m4af_write_ilst_box(m4af_ctx_t *ctx) |
48e2f01c |
1151 | { |
1152 | uint32_t i; |
1153 | int64_t pos = m4af_tell(ctx); |
1154 | m4af_write(ctx, "\0\0\0\0ilst", 8); |
1155 | for (i = 0; i < ctx->num_tags; ++i) |
1156 | m4af_write_metadata(ctx, &ctx->itmf_table[i]); |
e4bbeeb0 |
1157 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1158 | } |
1159 | |
1160 | static |
e4bbeeb0 |
1161 | void m4af_write_meta_box(m4af_ctx_t *ctx) |
48e2f01c |
1162 | { |
1163 | int64_t pos = m4af_tell(ctx); |
1164 | m4af_write(ctx, |
1165 | "\0\0\0\0" /* size */ |
1166 | "meta" /* type */ |
1167 | "\0" /* version */ |
1168 | "\0\0\0" /* flags */ |
1169 | , 12); |
e4bbeeb0 |
1170 | m4af_write_hdlr_box(ctx, 0, "mdir"); |
1171 | m4af_write_ilst_box(ctx); |
1172 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1173 | } |
1174 | |
1175 | static |
e4bbeeb0 |
1176 | void m4af_write_udta_box(m4af_ctx_t *ctx) |
48e2f01c |
1177 | { |
1178 | int64_t pos = m4af_tell(ctx); |
1179 | m4af_write(ctx, "\0\0\0\0udta", 8); |
e4bbeeb0 |
1180 | m4af_write_meta_box(ctx); |
1181 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1182 | } |
1183 | |
1184 | static |
e4bbeeb0 |
1185 | void m4af_write_moov_box(m4af_ctx_t *ctx) |
48e2f01c |
1186 | { |
1187 | unsigned i; |
1188 | int64_t pos = m4af_tell(ctx); |
1189 | m4af_write(ctx, "\0\0\0\0moov", 8); |
e4bbeeb0 |
1190 | m4af_write_mvhd_box(ctx); |
48e2f01c |
1191 | for (i = 0; i < ctx->num_tracks; ++i) |
e4bbeeb0 |
1192 | m4af_write_trak_box(ctx, i); |
48e2f01c |
1193 | if (ctx->num_tags) |
e4bbeeb0 |
1194 | m4af_write_udta_box(ctx); |
1195 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1196 | } |
1197 | |
1198 | static |
e4bbeeb0 |
1199 | void m4af_finalize_mdat(m4af_ctx_t *ctx) |
48e2f01c |
1200 | { |
1201 | if (ctx->mdat_size + 8 > UINT32_MAX) { |
1202 | m4af_set_pos(ctx, ctx->mdat_pos - 16); |
1203 | m4af_write32(ctx, 1); |
1204 | m4af_write(ctx, "mdat", 4); |
1205 | m4af_write64(ctx, ctx->mdat_size + 16); |
1206 | } else { |
1207 | m4af_set_pos(ctx, ctx->mdat_pos - 8); |
1208 | m4af_write32(ctx, ctx->mdat_size + 8); |
1209 | } |
1210 | m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size); |
1211 | } |
1212 | |
e4bbeeb0 |
1213 | int m4af_finalize(m4af_ctx_t *ctx) |
48e2f01c |
1214 | { |
1215 | unsigned i; |
1216 | m4af_track_t *track; |
1217 | |
1218 | for (i = 0; i < ctx->num_tracks; ++i) { |
1219 | track = ctx->track + i; |
1220 | if (track->duration) { |
1221 | int64_t track_size = 0; |
7b1f2136 |
1222 | unsigned j; |
48e2f01c |
1223 | for (j = 0; j < track->num_chunks; ++j) |
1224 | track_size += track->chunk_table[j].size; |
1225 | track->avgBitrate = |
1226 | 8.0 * track_size * track->timescale / track->duration + .5; |
1227 | } |
1228 | m4af_flush_chunk(ctx, i); |
1229 | } |
1230 | if (ctx->track[0].encoder_delay || ctx->track[0].padding) |
1231 | m4af_set_iTunSMPB(ctx); |
1232 | m4af_finalize_mdat(ctx); |
e4bbeeb0 |
1233 | m4af_write_moov_box(ctx); |
1234 | return ctx->last_error; |
48e2f01c |
1235 | } |