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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) | |
fb2b3635 | 26 | #define m4af_max(a,b) ((a)<(b)?(b):(a)) |
48e2f01c | 27 | |
e4bbeeb0 | 28 | #define M4AF_ATOM_WILD 0xffffffff |
29 | ||
48e2f01c | 30 | typedef struct m4af_sample_entry_t { |
31 | uint32_t size; | |
32 | uint32_t delta; | |
33 | } m4af_sample_entry_t; | |
34 | ||
35 | typedef struct m4af_chunk_entry_t { | |
36 | int64_t offset; | |
37 | uint32_t size; | |
38 | uint32_t samples_per_chunk; | |
39 | uint32_t duration; | |
40 | } m4af_chunk_entry_t; | |
41 | ||
48e2f01c | 42 | typedef struct m4af_track_t { |
43 | uint32_t codec; | |
44 | uint32_t timescale; | |
fcfed4cd | 45 | uint16_t num_channels; |
48e2f01c | 46 | int64_t creation_time; |
47 | int64_t modification_time; | |
48 | int64_t duration; | |
49 | uint32_t frame_duration; | |
50 | uint32_t encoder_delay; | |
51 | uint32_t padding; | |
52 | uint8_t *decSpecificInfo; | |
53 | uint32_t decSpecificInfoSize; | |
54 | uint32_t bufferSizeDB; | |
55 | uint32_t maxBitrate; | |
56 | uint32_t avgBitrate; | |
2f6fc566 | 57 | int is_vbr; |
48e2f01c | 58 | |
59 | m4af_sample_entry_t *sample_table; | |
60 | uint32_t num_samples; | |
61 | uint32_t sample_table_capacity; | |
62 | ||
63 | m4af_chunk_entry_t *chunk_table; | |
64 | uint32_t num_chunks; | |
65 | uint32_t chunk_table_capacity; | |
66 | ||
67 | uint8_t *chunk_buffer; | |
68 | uint32_t chunk_size; | |
69 | uint32_t chunk_capacity; | |
e4bbeeb0 | 70 | |
71 | /* temporary, to help parsing */ | |
72 | uint64_t stsc_pos; | |
73 | uint64_t stsc_size; | |
74 | ||
75 | uint64_t stts_pos; | |
76 | uint64_t stts_size; | |
48e2f01c | 77 | } m4af_track_t; |
78 | ||
e4bbeeb0 | 79 | struct m4af_ctx_t { |
48e2f01c | 80 | uint32_t timescale; |
81 | int64_t creation_time; | |
82 | int64_t modification_time; | |
83 | int64_t mdat_pos; | |
84 | int64_t mdat_size; | |
d317e29d | 85 | int priming_mode; |
48e2f01c | 86 | int last_error; |
87 | ||
88 | m4af_itmf_entry_t *itmf_table; | |
89 | uint32_t num_tags; | |
90 | uint32_t itmf_table_capacity; | |
91 | ||
92 | m4af_io_callbacks_t io; | |
93 | void *io_cookie; | |
94 | ||
95 | uint16_t num_tracks; | |
e4bbeeb0 | 96 | m4af_track_t track[2]; |
97 | ||
98 | m4af_itmf_entry_t current_tag; | |
48e2f01c | 99 | }; |
100 | ||
e4bbeeb0 | 101 | typedef struct m4af_box_parser_t { |
102 | uint32_t name; | |
103 | int (*handler)(m4af_ctx_t *ctx, uint32_t name, uint64_t size); | |
104 | } m4af_box_parser_t; | |
105 | ||
48e2f01c | 106 | static |
107 | int64_t m4af_timestamp(void) | |
108 | { | |
109 | return (int64_t)(time(0)) + (((1970 - 1904) * 365) + 17) * 24 * 60 * 60; | |
110 | } | |
111 | ||
112 | /* | |
113 | * http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 | |
114 | */ | |
115 | static | |
116 | uint32_t m4af_roundup(uint32_t n) | |
117 | { | |
118 | n--; | |
119 | n |= n >> 1; | |
120 | n |= n >> 2; | |
121 | n |= n >> 4; | |
122 | n |= n >> 8; | |
123 | n |= n >> 16; | |
124 | n++; | |
125 | return n; | |
126 | } | |
127 | ||
128 | static | |
e4bbeeb0 | 129 | int64_t m4af_tell(m4af_ctx_t *ctx) |
48e2f01c | 130 | { |
131 | int64_t pos = -1; | |
e4bbeeb0 | 132 | if ((pos = ctx->io.tell(ctx->io_cookie)) < 0) |
48e2f01c | 133 | ctx->last_error = M4AF_IO_ERROR; |
134 | return pos; | |
135 | } | |
136 | ||
137 | static | |
e4bbeeb0 | 138 | int m4af_set_pos(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c | 139 | { |
140 | int rc = -1; | |
e4bbeeb0 | 141 | if ((rc = ctx->io.seek(ctx->io_cookie, pos, SEEK_SET)) < 0) |
48e2f01c | 142 | ctx->last_error = M4AF_IO_ERROR; |
143 | return rc; | |
144 | } | |
145 | ||
146 | static | |
e4bbeeb0 | 147 | int m4af_write(m4af_ctx_t *ctx, const void *data, uint32_t size) |
48e2f01c | 148 | { |
149 | int rc = -1; | |
e4bbeeb0 | 150 | if ((rc = ctx->io.write(ctx->io_cookie, data, size)) < 0) |
48e2f01c | 151 | ctx->last_error = M4AF_IO_ERROR; |
152 | return rc; | |
153 | } | |
154 | ||
d317e29d | 155 | static |
156 | int m4af_write16(m4af_ctx_t *ctx, uint32_t data) | |
157 | { | |
158 | data = m4af_htob16(data); | |
159 | return m4af_write(ctx, &data, 2); | |
160 | } | |
161 | ||
48e2f01c | 162 | static |
e4bbeeb0 | 163 | int m4af_write32(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c | 164 | { |
165 | data = m4af_htob32(data); | |
166 | return m4af_write(ctx, &data, 4); | |
167 | } | |
168 | ||
169 | static | |
e4bbeeb0 | 170 | int m4af_write64(m4af_ctx_t *ctx, uint64_t data) |
48e2f01c | 171 | { |
172 | data = m4af_htob64(data); | |
173 | return m4af_write(ctx, &data, 8); | |
174 | } | |
175 | ||
176 | static | |
e4bbeeb0 | 177 | int m4af_write24(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c | 178 | { |
179 | data = m4af_htob32(data << 8); | |
180 | return m4af_write(ctx, &data, 3); | |
181 | } | |
182 | ||
183 | static | |
e4bbeeb0 | 184 | void m4af_write32_at(m4af_ctx_t *ctx, int64_t pos, uint32_t value) |
48e2f01c | 185 | { |
186 | int64_t current_pos = m4af_tell(ctx); | |
187 | m4af_set_pos(ctx, pos); | |
188 | m4af_write32(ctx, value); | |
189 | m4af_set_pos(ctx, current_pos); | |
190 | } | |
191 | ||
e4bbeeb0 | 192 | m4af_ctx_t *m4af_create(uint32_t codec, uint32_t timescale, |
193 | m4af_io_callbacks_t *io, void *io_cookie) | |
48e2f01c | 194 | { |
e4bbeeb0 | 195 | m4af_ctx_t *ctx; |
48e2f01c | 196 | int64_t timestamp; |
197 | ||
198 | if (codec != M4AF_FOURCC('m','p','4','a') && | |
199 | codec != M4AF_FOURCC('a','l','a','c')) | |
200 | return 0; | |
e4bbeeb0 | 201 | if ((ctx = m4af_realloc(0, sizeof(m4af_ctx_t))) == 0) |
48e2f01c | 202 | return 0; |
e4bbeeb0 | 203 | memset(ctx, 0, sizeof(m4af_ctx_t)); |
48e2f01c | 204 | memcpy(&ctx->io, io, sizeof(m4af_io_callbacks_t)); |
205 | ctx->io_cookie = io_cookie; | |
206 | ctx->timescale = timescale; | |
207 | timestamp = m4af_timestamp(); | |
208 | ctx->creation_time = timestamp; | |
209 | ctx->modification_time = timestamp; | |
210 | ctx->num_tracks = 1; | |
211 | ctx->track[0].codec = codec; | |
212 | ctx->track[0].timescale = timescale; | |
213 | ctx->track[0].creation_time = timestamp; | |
214 | ctx->track[0].modification_time = timestamp; | |
fcfed4cd | 215 | ctx->track[0].num_channels = 2; |
48e2f01c | 216 | return ctx; |
217 | } | |
218 | ||
e4bbeeb0 | 219 | static |
220 | void m4af_free_itmf_table(m4af_ctx_t *ctx) | |
221 | { | |
222 | uint32_t i; | |
223 | m4af_itmf_entry_t *entry = ctx->itmf_table; | |
224 | for (i = 0; i < ctx->num_tags; ++i, ++entry) { | |
225 | if (entry->fcc == M4AF_FOURCC('-','-','-','-')) | |
226 | m4af_free(entry->name); | |
227 | m4af_free(entry->data); | |
228 | } | |
229 | m4af_free(ctx->itmf_table); | |
230 | } | |
231 | ||
232 | static | |
233 | void m4af_clear_track(m4af_ctx_t *ctx, int track_idx) | |
234 | { | |
235 | m4af_track_t *track = ctx->track + track_idx; | |
236 | if (track->decSpecificInfo) | |
237 | m4af_free(track->decSpecificInfo); | |
238 | if (track->sample_table) | |
239 | m4af_free(track->sample_table); | |
240 | if (track->chunk_table) | |
241 | m4af_free(track->chunk_table); | |
242 | if (track->chunk_buffer) | |
243 | m4af_free(track->chunk_buffer); | |
244 | memset(track, 0, sizeof(m4af_track_t)); | |
245 | } | |
246 | ||
247 | void m4af_teardown(m4af_ctx_t **ctxp) | |
248 | { | |
249 | unsigned i; | |
250 | m4af_ctx_t *ctx = *ctxp; | |
251 | for (i = 0; i < ctx->num_tracks; ++i) | |
252 | m4af_clear_track(ctx, i); | |
253 | if (ctx->itmf_table) | |
254 | m4af_free_itmf_table(ctx); | |
255 | m4af_free(ctx); | |
256 | *ctxp = 0; | |
257 | } | |
258 | ||
fcfed4cd | 259 | void m4af_set_num_channels(m4af_ctx_t *ctx, uint32_t track_idx, |
260 | uint16_t channels) | |
261 | { | |
262 | ctx->track[track_idx].num_channels = channels; | |
263 | } | |
264 | ||
e4bbeeb0 | 265 | void m4af_set_fixed_frame_duration(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c | 266 | uint32_t length) |
267 | { | |
268 | ctx->track[track_idx].frame_duration = length; | |
269 | } | |
270 | ||
e4bbeeb0 | 271 | int m4af_set_decoder_specific_info(m4af_ctx_t *ctx, uint32_t track_idx, |
272 | uint8_t *data, uint32_t size) | |
48e2f01c | 273 | { |
274 | m4af_track_t *track = &ctx->track[track_idx]; | |
275 | if (size > track->decSpecificInfoSize) { | |
276 | uint8_t *memory = m4af_realloc(track->decSpecificInfo, size); | |
277 | if (memory == 0) { | |
278 | ctx->last_error = M4AF_NO_MEMORY; | |
e4bbeeb0 | 279 | goto DONE; |
48e2f01c | 280 | } |
281 | track->decSpecificInfo = memory; | |
282 | } | |
283 | if (size > 0) | |
284 | memcpy(track->decSpecificInfo, data, size); | |
285 | track->decSpecificInfoSize = size; | |
e4bbeeb0 | 286 | DONE: |
287 | return ctx->last_error; | |
48e2f01c | 288 | } |
289 | ||
2f6fc566 | 290 | void m4af_set_vbr_mode(m4af_ctx_t *ctx, uint32_t track_idx, int is_vbr) |
291 | { | |
292 | m4af_track_t *track = &ctx->track[track_idx]; | |
293 | track->is_vbr = is_vbr; | |
294 | } | |
295 | ||
e4bbeeb0 | 296 | void m4af_set_priming(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c | 297 | uint32_t encoder_delay, uint32_t padding) |
298 | { | |
299 | m4af_track_t *track = &ctx->track[track_idx]; | |
300 | track->encoder_delay = encoder_delay; | |
301 | track->padding = padding; | |
302 | } | |
303 | ||
d317e29d | 304 | void m4af_set_priming_mode(m4af_ctx_t *ctx, int mode) |
305 | { | |
306 | ctx->priming_mode = mode; | |
307 | } | |
308 | ||
48e2f01c | 309 | static |
e4bbeeb0 | 310 | int m4af_add_sample_entry(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c | 311 | uint32_t size, uint32_t delta) |
312 | { | |
313 | m4af_track_t *track = &ctx->track[track_idx]; | |
314 | m4af_sample_entry_t *entry; | |
315 | ||
316 | if (ctx->last_error) | |
317 | return -1; | |
318 | if (track->num_samples == track->sample_table_capacity) { | |
319 | uint32_t new_size = track->sample_table_capacity; | |
320 | new_size = new_size ? new_size * 2 : 1; | |
321 | entry = m4af_realloc(track->sample_table, new_size * sizeof(*entry)); | |
322 | if (entry == 0) { | |
323 | ctx->last_error = M4AF_NO_MEMORY; | |
324 | return -1; | |
325 | } | |
326 | track->sample_table = entry; | |
327 | track->sample_table_capacity = new_size; | |
328 | } | |
329 | entry = track->sample_table + track->num_samples; | |
330 | entry->size = size; | |
331 | entry->delta = delta; | |
332 | ++track->num_samples; | |
333 | return 0; | |
334 | } | |
335 | ||
336 | static | |
e4bbeeb0 | 337 | int m4af_flush_chunk(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 338 | { |
339 | m4af_track_t *track = &ctx->track[track_idx]; | |
340 | m4af_chunk_entry_t *entry; | |
341 | if (!track->num_chunks || !track->chunk_size) | |
342 | return 0; | |
343 | entry = &track->chunk_table[track->num_chunks - 1]; | |
344 | entry->offset = m4af_tell(ctx); | |
345 | m4af_write(ctx, track->chunk_buffer, track->chunk_size); | |
346 | ctx->mdat_size += track->chunk_size; | |
347 | track->chunk_size = 0; | |
348 | return ctx->last_error ? -1 : 0; | |
349 | } | |
350 | ||
351 | static | |
e4bbeeb0 | 352 | int m4af_add_chunk_entry(m4af_ctx_t *ctx, uint32_t track_idx) |
353 | { | |
354 | m4af_track_t *track = &ctx->track[track_idx]; | |
355 | m4af_chunk_entry_t *entry; | |
356 | if (track->num_chunks == track->chunk_table_capacity) { | |
357 | uint32_t new_size = track->chunk_table_capacity; | |
358 | new_size = new_size ? new_size * 2 : 1; | |
359 | entry = m4af_realloc(track->chunk_table, new_size * sizeof(*entry)); | |
360 | if (entry == 0) { | |
361 | ctx->last_error = M4AF_NO_MEMORY; | |
362 | return -1; | |
363 | } | |
364 | track->chunk_table = entry; | |
365 | track->chunk_table_capacity = new_size; | |
366 | } | |
367 | memset(&track->chunk_table[track->num_chunks++], 0, | |
368 | sizeof(m4af_chunk_entry_t)); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | static | |
373 | int m4af_update_chunk_table(m4af_ctx_t *ctx, uint32_t track_idx, | |
48e2f01c | 374 | uint32_t size, uint32_t delta) |
375 | { | |
376 | m4af_track_t *track = &ctx->track[track_idx]; | |
377 | m4af_chunk_entry_t *entry; | |
378 | int add_new_chunk = 0; | |
379 | ||
380 | if (ctx->last_error) | |
381 | return -1; | |
382 | if (track->num_chunks == 0) | |
383 | add_new_chunk = 1; | |
384 | else { | |
385 | entry = &track->chunk_table[track->num_chunks - 1]; | |
386 | if (entry->duration + delta > track->timescale / 2) | |
387 | add_new_chunk = 1; | |
388 | } | |
389 | if (add_new_chunk) { | |
390 | m4af_flush_chunk(ctx, track_idx); | |
e4bbeeb0 | 391 | if (m4af_add_chunk_entry(ctx, track_idx) < 0) |
392 | return -1; | |
48e2f01c | 393 | } |
394 | entry = &track->chunk_table[track->num_chunks - 1]; | |
395 | entry->size += size; | |
396 | ++entry->samples_per_chunk; | |
397 | entry->duration += delta; | |
398 | return 0; | |
399 | } | |
400 | ||
401 | static | |
e4bbeeb0 | 402 | void m4af_update_max_bitrate(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 403 | { |
404 | m4af_track_t *track = &ctx->track[track_idx]; | |
405 | uint32_t duration = 0, size = 0, bitrate; | |
406 | m4af_sample_entry_t *ent = track->sample_table + track->num_samples - 1; | |
407 | ||
408 | for (; ent >= track->sample_table && duration < track->timescale; --ent) { | |
409 | duration += ent->delta; | |
410 | size += ent->size; | |
411 | } | |
412 | bitrate = (uint32_t)(size * 8.0 * track->timescale / duration + .5); | |
413 | if (bitrate > track->maxBitrate) | |
414 | track->maxBitrate = bitrate; | |
415 | } | |
416 | ||
417 | static | |
e4bbeeb0 | 418 | int m4af_append_sample_to_chunk(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c | 419 | const void *data, uint32_t size) |
420 | { | |
421 | m4af_track_t *track = &ctx->track[track_idx]; | |
422 | uint32_t newsize = track->chunk_size + size; | |
423 | ||
424 | if (ctx->last_error) | |
425 | return -1; | |
426 | if (track->chunk_capacity < newsize) { | |
427 | uint32_t capacity = m4af_roundup(newsize); | |
428 | uint8_t *memory = realloc(track->chunk_buffer, capacity); | |
429 | if (!memory) { | |
430 | ctx->last_error = M4AF_NO_MEMORY; | |
431 | return -1; | |
432 | } | |
433 | track->chunk_buffer = memory; | |
434 | track->chunk_capacity = capacity; | |
435 | } | |
436 | memcpy(track->chunk_buffer + track->chunk_size, data, size); | |
437 | track->chunk_size = newsize; | |
438 | return 0; | |
439 | } | |
440 | ||
e4bbeeb0 | 441 | int m4af_write_sample(m4af_ctx_t *ctx, uint32_t track_idx, const void *data, |
48e2f01c | 442 | uint32_t size, uint32_t duration) |
443 | { | |
444 | m4af_track_t *track = &ctx->track[track_idx]; | |
445 | if (track->frame_duration) | |
446 | duration = track->frame_duration; | |
447 | if (size > track->bufferSizeDB) | |
448 | track->bufferSizeDB = size; | |
449 | track->duration += duration; | |
450 | m4af_add_sample_entry(ctx, track_idx, size, duration); | |
451 | m4af_update_chunk_table(ctx, track_idx, size, duration); | |
452 | m4af_update_max_bitrate(ctx, track_idx); | |
453 | m4af_append_sample_to_chunk(ctx, track_idx, data, size); | |
e4bbeeb0 | 454 | return ctx->last_error; |
48e2f01c | 455 | } |
456 | ||
457 | static | |
93fb917b | 458 | m4af_itmf_entry_t *m4af_find_itmf_slot(m4af_ctx_t *ctx, uint32_t fcc, |
459 | const char *name) | |
48e2f01c | 460 | { |
93fb917b | 461 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
462 | ||
463 | if (name) | |
464 | fcc = M4AF_FOURCC('-','-','-','-'); | |
465 | ||
466 | if (fcc != M4AF_TAG_ARTWORK) | |
467 | for (; entry != ctx->itmf_table + ctx->num_tags; ++entry) | |
468 | if (fcc == entry->fcc && (!name || !strcmp(name, entry->name))) | |
469 | return entry; | |
470 | ||
48e2f01c | 471 | if (ctx->num_tags == ctx->itmf_table_capacity) { |
472 | uint32_t new_size = ctx->itmf_table_capacity; | |
473 | new_size = new_size ? new_size * 2 : 1; | |
474 | entry = m4af_realloc(ctx->itmf_table, new_size * sizeof(*entry)); | |
475 | if (entry == 0) { | |
476 | ctx->last_error = M4AF_NO_MEMORY; | |
93fb917b | 477 | return 0; |
48e2f01c | 478 | } |
479 | ctx->itmf_table = entry; | |
480 | ctx->itmf_table_capacity = new_size; | |
481 | } | |
93fb917b | 482 | entry = &ctx->itmf_table[ctx->num_tags++]; |
483 | memset(entry, 0, sizeof(m4af_itmf_entry_t)); | |
484 | entry->fcc = fcc; | |
485 | if (name) { | |
486 | char *name_copy = m4af_realloc(0, strlen(name) + 1); | |
487 | if (!name_copy) { | |
488 | ctx->last_error = M4AF_NO_MEMORY; | |
489 | --ctx->num_tags; | |
490 | return 0; | |
491 | } | |
492 | strcpy(name_copy, name); | |
493 | entry->name = name_copy; | |
494 | } | |
495 | return entry; | |
48e2f01c | 496 | } |
497 | ||
e4bbeeb0 | 498 | int m4af_add_itmf_long_tag(m4af_ctx_t *ctx, const char *name, |
48e2f01c | 499 | const char *data) |
500 | { | |
501 | m4af_itmf_entry_t *entry; | |
93fb917b | 502 | char *data_copy = 0; |
48e2f01c | 503 | size_t name_len = strlen(name); |
504 | size_t data_len = strlen(data); | |
93fb917b | 505 | if (!name_len || !data_len) |
506 | return 0; | |
507 | ||
508 | if ((entry = m4af_find_itmf_slot(ctx, 0, name)) == 0) | |
509 | goto FAIL; | |
510 | entry->type_code = M4AF_UTF8; | |
511 | if ((data_copy = m4af_realloc(entry->data, data_len)) == 0) { | |
48e2f01c | 512 | ctx->last_error = M4AF_NO_MEMORY; |
513 | goto FAIL; | |
514 | } | |
48e2f01c | 515 | memcpy(data_copy, data, data_len); |
48e2f01c | 516 | entry->data = data_copy; |
517 | entry->data_size = data_len; | |
518 | return 0; | |
519 | FAIL: | |
e4bbeeb0 | 520 | return ctx->last_error; |
48e2f01c | 521 | } |
522 | ||
e4bbeeb0 | 523 | int m4af_add_itmf_short_tag(m4af_ctx_t *ctx, uint32_t fcc, |
48e2f01c | 524 | uint32_t type_code, const void *data, |
525 | uint32_t data_size) | |
526 | { | |
527 | m4af_itmf_entry_t *entry; | |
93fb917b | 528 | char *data_copy = 0; |
529 | ||
530 | if (!data_size) | |
531 | return 0; | |
532 | if ((entry = m4af_find_itmf_slot(ctx, fcc, 0)) == 0) | |
533 | goto FAIL; | |
534 | entry->type_code = type_code; | |
535 | if ((data_copy = m4af_realloc(entry->data, data_size)) == 0) { | |
48e2f01c | 536 | ctx->last_error = M4AF_NO_MEMORY; |
537 | goto FAIL; | |
538 | } | |
48e2f01c | 539 | memcpy(data_copy, data, data_size); |
540 | entry->data = data_copy; | |
541 | entry->data_size = data_size; | |
542 | return 0; | |
543 | FAIL: | |
e4bbeeb0 | 544 | return ctx->last_error; |
48e2f01c | 545 | } |
546 | ||
e4bbeeb0 | 547 | int m4af_add_itmf_string_tag(m4af_ctx_t *ctx, uint32_t fcc, const char *data) |
48e2f01c | 548 | { |
e4bbeeb0 | 549 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_UTF8, data, strlen(data)); |
48e2f01c | 550 | } |
551 | ||
e4bbeeb0 | 552 | int m4af_add_itmf_int8_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c | 553 | { |
554 | uint8_t data = value; | |
e4bbeeb0 | 555 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 1); |
48e2f01c | 556 | } |
557 | ||
e4bbeeb0 | 558 | int m4af_add_itmf_int16_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c | 559 | { |
560 | uint16_t data = m4af_htob16(value); | |
e4bbeeb0 | 561 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 2); |
48e2f01c | 562 | } |
563 | ||
e4bbeeb0 | 564 | int m4af_add_itmf_int32_tag(m4af_ctx_t *ctx, uint32_t fcc, uint32_t value) |
48e2f01c | 565 | { |
566 | uint32_t data = m4af_htob32(value); | |
e4bbeeb0 | 567 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 4); |
48e2f01c | 568 | } |
569 | ||
e4bbeeb0 | 570 | int m4af_add_itmf_int64_tag(m4af_ctx_t *ctx, uint32_t fcc, uint64_t value) |
c5c45908 | 571 | { |
572 | uint64_t data = m4af_htob64(value); | |
e4bbeeb0 | 573 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 8); |
c5c45908 | 574 | } |
575 | ||
e4bbeeb0 | 576 | int m4af_add_itmf_track_tag(m4af_ctx_t *ctx, int track, int total) |
48e2f01c | 577 | { |
578 | uint16_t data[4] = { 0 }; | |
579 | data[1] = m4af_htob16(track); | |
580 | data[2] = m4af_htob16(total); | |
581 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('t','r','k','n'), | |
582 | M4AF_IMPLICIT, &data, 8); | |
583 | } | |
584 | ||
e4bbeeb0 | 585 | int m4af_add_itmf_disk_tag(m4af_ctx_t *ctx, int disk, int total) |
48e2f01c | 586 | { |
587 | uint16_t data[3] = { 0 }; | |
588 | data[1] = m4af_htob16(disk); | |
589 | data[2] = m4af_htob16(total); | |
590 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('d','i','s','k'), | |
591 | M4AF_IMPLICIT, &data, 6); | |
592 | } | |
593 | ||
e4bbeeb0 | 594 | int m4af_add_itmf_genre_tag(m4af_ctx_t *ctx, int genre) |
48e2f01c | 595 | { |
596 | uint16_t data = m4af_htob16(genre); | |
597 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('g','n','r','e'), | |
598 | M4AF_IMPLICIT, &data, 2); | |
599 | } | |
600 | ||
601 | static | |
e4bbeeb0 | 602 | int m4af_set_iTunSMPB(m4af_ctx_t *ctx) |
48e2f01c | 603 | { |
e4bbeeb0 | 604 | const char *fmt = " 00000000 %08X %08X %08X%08X 00000000 00000000 " |
48e2f01c | 605 | "00000000 00000000 00000000 00000000 00000000 00000000"; |
606 | m4af_track_t *track = &ctx->track[0]; | |
607 | char buf[256]; | |
608 | uint64_t length = track->duration - track->encoder_delay - track->padding; | |
e4bbeeb0 | 609 | sprintf(buf, fmt, track->encoder_delay, track->padding, |
48e2f01c | 610 | (uint32_t)(length >> 32), (uint32_t)length); |
611 | return m4af_add_itmf_long_tag(ctx, "iTunSMPB", buf); | |
612 | } | |
613 | ||
614 | static | |
fb2b3635 | 615 | uint32_t m4af_update_box_size(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c | 616 | { |
617 | int64_t current_pos = m4af_tell(ctx); | |
618 | m4af_set_pos(ctx, pos); | |
619 | m4af_write32(ctx, current_pos - pos); | |
620 | m4af_set_pos(ctx, current_pos); | |
fb2b3635 | 621 | return current_pos - pos; |
48e2f01c | 622 | } |
623 | ||
48e2f01c | 624 | static |
e4bbeeb0 | 625 | void m4af_write_descriptor(m4af_ctx_t *ctx, uint32_t tag, uint32_t size) |
48e2f01c | 626 | { |
627 | uint8_t buf[5]; | |
628 | buf[0] = tag; | |
629 | buf[1] = ((size >> 21) | 0x80); | |
630 | buf[2] = ((size >> 14) | 0x80); | |
631 | buf[3] = ((size >> 7) | 0x80); | |
632 | buf[4] = (size & 0x7f); | |
633 | m4af_write(ctx, buf, 5); | |
634 | } | |
635 | ||
636 | static | |
e4bbeeb0 | 637 | void m4af_write_ftyp_box(m4af_ctx_t *ctx) |
48e2f01c | 638 | { |
639 | m4af_write(ctx, "\0\0\0\040""ftypM4A \0\0\0\0M4A mp42isom\0\0\0\0", 32); | |
640 | } | |
641 | ||
642 | static | |
e4bbeeb0 | 643 | void m4af_write_free_box(m4af_ctx_t *ctx, uint32_t size) |
48e2f01c | 644 | { |
645 | int64_t pos = m4af_tell(ctx); | |
646 | m4af_write32(ctx, size + 8); | |
647 | m4af_write(ctx, "free", 4); | |
648 | if (size > 0) | |
649 | m4af_set_pos(ctx, pos + size + 8); | |
650 | } | |
651 | ||
e4bbeeb0 | 652 | int m4af_begin_write(m4af_ctx_t *ctx) |
48e2f01c | 653 | { |
e4bbeeb0 | 654 | m4af_write_ftyp_box(ctx); |
655 | m4af_write_free_box(ctx, 0); | |
48e2f01c | 656 | m4af_write(ctx, "\0\0\0\0mdat", 8); |
657 | ctx->mdat_pos = m4af_tell(ctx); | |
e4bbeeb0 | 658 | return ctx->last_error; |
48e2f01c | 659 | } |
660 | ||
661 | static | |
e4bbeeb0 | 662 | void m4af_write_stco_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 663 | { |
664 | m4af_track_t *track = &ctx->track[track_idx]; | |
665 | uint32_t i; | |
666 | m4af_chunk_entry_t *index = track->chunk_table; | |
667 | int is_co64 = (ctx->mdat_pos + ctx->mdat_size > UINT32_MAX); | |
668 | int64_t pos = m4af_tell(ctx); | |
669 | ||
670 | m4af_write32(ctx, 0); /* size */ | |
671 | m4af_write(ctx, is_co64 ? "co64" : "stco", 4); | |
672 | m4af_write32(ctx, 0); /* version and flags */ | |
673 | m4af_write32(ctx, track->num_chunks); | |
674 | for (i = 0; i < track->num_chunks; ++i, ++index) { | |
675 | if (is_co64) | |
676 | m4af_write64(ctx, index->offset); | |
677 | else | |
678 | m4af_write32(ctx, index->offset); | |
679 | } | |
e4bbeeb0 | 680 | m4af_update_box_size(ctx, pos); |
48e2f01c | 681 | } |
682 | ||
683 | static | |
e4bbeeb0 | 684 | void m4af_write_stsz_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 685 | { |
686 | m4af_track_t *track = &ctx->track[track_idx]; | |
687 | m4af_sample_entry_t *index = track->sample_table; | |
688 | uint32_t i; | |
689 | int64_t pos = m4af_tell(ctx); | |
690 | m4af_write(ctx, | |
691 | "\0\0\0\0" /* size */ | |
692 | "stsz" /* type */ | |
693 | "\0" /* version */ | |
694 | "\0\0\0" /* flags */ | |
695 | "\0\0\0\0" /* sample_size: 0(variable) */ | |
696 | , 16); | |
697 | m4af_write32(ctx, track->num_samples); | |
698 | for (i = 0; i < track->num_samples; ++i, ++index) | |
699 | m4af_write32(ctx, index->size); | |
e4bbeeb0 | 700 | m4af_update_box_size(ctx, pos); |
48e2f01c | 701 | } |
702 | ||
703 | static | |
e4bbeeb0 | 704 | void m4af_write_stsc_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 705 | { |
706 | m4af_track_t *track = &ctx->track[track_idx]; | |
707 | m4af_chunk_entry_t *index = track->chunk_table; | |
708 | uint32_t i, prev_samples_per_chunk = 0, entry_count = 0; | |
709 | int64_t pos = m4af_tell(ctx); | |
710 | m4af_write(ctx, | |
711 | "\0\0\0\0" /* size */ | |
712 | "stsc" /* type */ | |
713 | "\0" /* version */ | |
714 | "\0\0\0" /* flags */ | |
715 | "\0\0\0\0" /* entry_count */ | |
716 | , 16); | |
717 | ||
718 | for (i = 0; i < track->num_chunks; ++i, ++index) { | |
719 | if (index->samples_per_chunk != prev_samples_per_chunk) { | |
720 | ++entry_count; | |
721 | m4af_write32(ctx, i + 1); | |
722 | m4af_write32(ctx, index->samples_per_chunk); | |
723 | m4af_write32(ctx, 1); /* sample_description_index */ | |
724 | prev_samples_per_chunk = index->samples_per_chunk; | |
725 | } | |
726 | } | |
727 | m4af_write32_at(ctx, pos + 12, entry_count); | |
e4bbeeb0 | 728 | m4af_update_box_size(ctx, pos); |
48e2f01c | 729 | } |
730 | ||
731 | static | |
e4bbeeb0 | 732 | void m4af_write_stts_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 733 | { |
734 | m4af_track_t *track = &ctx->track[track_idx]; | |
735 | m4af_sample_entry_t *index = track->sample_table; | |
736 | uint32_t i, prev_delta = 0, entry_count = 0, sample_count = 0; | |
737 | int64_t pos = m4af_tell(ctx); | |
738 | m4af_write(ctx, | |
739 | "\0\0\0\0" /* size */ | |
740 | "stts" /* type */ | |
741 | "\0" /* version */ | |
742 | "\0\0\0" /* flags */ | |
743 | "\0\0\0\0" /* entry_count */ | |
744 | , 16); | |
745 | ||
746 | for (i = 0; i < track->num_samples; ++i, ++index) { | |
747 | if (index->delta == prev_delta) | |
748 | ++sample_count; | |
749 | else { | |
750 | ++entry_count; | |
751 | if (sample_count) { | |
752 | m4af_write32(ctx, sample_count); | |
753 | m4af_write32(ctx, prev_delta); | |
754 | } | |
755 | prev_delta = index->delta; | |
756 | sample_count = 1; | |
757 | } | |
758 | } | |
759 | if (sample_count) { | |
760 | m4af_write32(ctx, sample_count); | |
761 | m4af_write32(ctx, prev_delta); | |
762 | } | |
763 | m4af_write32_at(ctx, pos + 12, entry_count); | |
e4bbeeb0 | 764 | m4af_update_box_size(ctx, pos); |
48e2f01c | 765 | } |
766 | ||
767 | static | |
e4bbeeb0 | 768 | void m4af_write_esds_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 769 | { |
770 | m4af_track_t *track = &ctx->track[track_idx]; | |
771 | int64_t pos = m4af_tell(ctx); | |
772 | m4af_write(ctx, "\0\0\0\0esds", 8); | |
773 | m4af_write32(ctx, 0); /* version + flags */ | |
774 | ||
775 | /* ES_Descriptor */ | |
e4bbeeb0 | 776 | m4af_write_descriptor(ctx, 3, 32 + track->decSpecificInfoSize); |
48e2f01c | 777 | m4af_write(ctx, "\0\0\0", 3); |
778 | /* DecoderConfigDescriptor */ | |
e4bbeeb0 | 779 | m4af_write_descriptor(ctx, 4, 18 + track->decSpecificInfoSize); |
48e2f01c | 780 | m4af_write(ctx, |
781 | "\x40" /* objectTypeIndication: 0x40(Audio ISO/IEC 14496-3)*/ | |
782 | "\x15" /* streamType(6): 0x05(AudioStream) | |
783 | * upStream(1) : 0 | |
784 | * reserved(1) : 1 | |
785 | */ | |
786 | , 2); | |
787 | m4af_write24(ctx, track->bufferSizeDB); | |
788 | m4af_write32(ctx, track->maxBitrate); | |
2f6fc566 | 789 | m4af_write32(ctx, track->is_vbr ? 0: track->avgBitrate); |
48e2f01c | 790 | /* DecoderSpecificInfo */ |
e4bbeeb0 | 791 | m4af_write_descriptor(ctx, 5, track->decSpecificInfoSize); |
48e2f01c | 792 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
793 | /* SLConfigDescriptor */ | |
e4bbeeb0 | 794 | m4af_write_descriptor(ctx, 6, 1); |
48e2f01c | 795 | m4af_write(ctx, "\002", 1); /* predefined */ |
796 | ||
e4bbeeb0 | 797 | m4af_update_box_size(ctx, pos); |
48e2f01c | 798 | } |
799 | ||
800 | static | |
e4bbeeb0 | 801 | void m4af_write_alac_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 802 | { |
803 | m4af_track_t *track = &ctx->track[track_idx]; | |
804 | int64_t pos = m4af_tell(ctx); | |
805 | m4af_write(ctx, | |
806 | "\0\0\0\0" /* size */ | |
807 | "alac" /* type */ | |
808 | "\0" /* version */ | |
809 | "\0\0\0" /* flags */ | |
810 | , 12); | |
811 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); | |
e4bbeeb0 | 812 | m4af_update_box_size(ctx, pos); |
48e2f01c | 813 | } |
814 | ||
815 | static | |
e4bbeeb0 | 816 | void m4af_write_mp4a_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 817 | { |
818 | m4af_track_t *track = &ctx->track[track_idx]; | |
819 | int64_t pos = m4af_tell(ctx); | |
820 | m4af_write32(ctx, 0); /* size */ | |
821 | m4af_write32(ctx, track->codec); /* mp4a or alac */ | |
822 | m4af_write(ctx, | |
823 | "\0\0\0\0\0\0" /* reserved */ | |
824 | "\0\001" /* data_reference_index: 1 */ | |
825 | "\0\0\0\0" /* reserved[0] */ | |
826 | "\0\0\0\0" /* reserved[1] */ | |
fcfed4cd | 827 | ,16); |
828 | m4af_write16(ctx, track->num_channels); | |
829 | m4af_write(ctx, | |
48e2f01c | 830 | "\0\020" /* samplesize: 16 */ |
831 | "\0\0" /* pre_defined */ | |
832 | "\0\0" /* reserved */ | |
fcfed4cd | 833 | ,6); |
48e2f01c | 834 | if (track->codec == M4AF_FOURCC('m','p','4','a')) { |
835 | m4af_write32(ctx, track->timescale << 16); | |
e4bbeeb0 | 836 | m4af_write_esds_box(ctx, track_idx); |
48e2f01c | 837 | } else { |
e4bbeeb0 | 838 | m4af_write32(ctx, 44100 << 16); |
839 | m4af_write_alac_box(ctx, track_idx); | |
48e2f01c | 840 | } |
e4bbeeb0 | 841 | m4af_update_box_size(ctx, pos); |
48e2f01c | 842 | } |
843 | ||
844 | static | |
e4bbeeb0 | 845 | void m4af_write_stsd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 846 | { |
847 | int64_t pos = m4af_tell(ctx); | |
848 | m4af_write(ctx, "\0\0\0\0stsd", 8); | |
849 | m4af_write(ctx, | |
850 | "\0" /* version */ | |
851 | "\0\0\0" /* flags */ | |
852 | "\0\0\0\001" /* entry_count: 1 */ | |
853 | , 8); | |
e4bbeeb0 | 854 | m4af_write_mp4a_box(ctx, track_idx); |
855 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 856 | } |
857 | ||
d317e29d | 858 | static |
859 | void m4af_write_sbgp_box(m4af_ctx_t *ctx, uint32_t track_idx) | |
860 | { | |
861 | m4af_track_t *track = &ctx->track[track_idx]; | |
862 | m4af_write(ctx, | |
863 | "\0\0\0\034" /* size: 28 */ | |
864 | "sbgp" /* type */ | |
865 | "\0" /* version */ | |
866 | "\0\0\0" /* flags */ | |
867 | "roll" /* grouping_type */ | |
868 | "\0\0\0\001" /* entry_count: 1 */ | |
869 | , 20); | |
870 | m4af_write32(ctx, track->num_samples); | |
871 | m4af_write32(ctx, 1); /* group_description_index */ | |
872 | } | |
873 | ||
874 | static | |
875 | void m4af_write_sgpd_box(m4af_ctx_t *ctx, uint32_t track_idx) | |
876 | { | |
d317e29d | 877 | m4af_write(ctx, |
91ef87b6 | 878 | "\0\0\0\026" /* size: 22 */ |
d317e29d | 879 | "sgpd" /* type */ |
91ef87b6 | 880 | "\0" /* version */ |
d317e29d | 881 | "\0\0\0" /* flags */ |
882 | "roll" /* grouping_type */ | |
d317e29d | 883 | "\0\0\0\001" /* entry_count: 1 */ |
884 | "\377\377" /* payload_data: -1 */ | |
91ef87b6 | 885 | , 22); |
d317e29d | 886 | } |
887 | ||
48e2f01c | 888 | static |
e4bbeeb0 | 889 | void m4af_write_stbl_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 890 | { |
d317e29d | 891 | m4af_track_t *track = &ctx->track[track_idx]; |
48e2f01c | 892 | int64_t pos = m4af_tell(ctx); |
893 | m4af_write(ctx, "\0\0\0\0stbl", 8); | |
e4bbeeb0 | 894 | m4af_write_stsd_box(ctx, track_idx); |
d317e29d | 895 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_EDTS) && |
896 | (track->encoder_delay || track->padding)) { | |
897 | m4af_write_sbgp_box(ctx, track_idx); | |
898 | m4af_write_sgpd_box(ctx, track_idx); | |
899 | } | |
e4bbeeb0 | 900 | m4af_write_stts_box(ctx, track_idx); |
901 | m4af_write_stsc_box(ctx, track_idx); | |
902 | m4af_write_stsz_box(ctx, track_idx); | |
903 | m4af_write_stco_box(ctx, track_idx); | |
904 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 905 | } |
906 | ||
907 | static | |
e4bbeeb0 | 908 | void m4af_write_url_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 909 | { |
910 | m4af_write(ctx, | |
911 | "\0\0\0\014" /* size */ | |
912 | "url " /* type */ | |
913 | "\0" /* version */ | |
914 | "\0\0\001" /* flags: 1(in the same file) */ | |
915 | , 12); | |
916 | } | |
917 | ||
918 | static | |
e4bbeeb0 | 919 | void m4af_write_dref_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 920 | { |
921 | int64_t pos = m4af_tell(ctx); | |
922 | m4af_write(ctx, "\0\0\0\0dref", 8); | |
923 | m4af_write(ctx, | |
924 | "\0" /* version */ | |
925 | "\0\0\0" /* flags */ | |
926 | "\0\0\0\001" /* entry_count: 1 */ | |
927 | ,8); | |
e4bbeeb0 | 928 | m4af_write_url_box(ctx, track_idx); |
929 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 930 | } |
931 | ||
932 | static | |
e4bbeeb0 | 933 | void m4af_write_dinf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 934 | { |
935 | int64_t pos = m4af_tell(ctx); | |
936 | m4af_write(ctx, "\0\0\0\0dinf", 8); | |
e4bbeeb0 | 937 | m4af_write_dref_box(ctx, track_idx); |
938 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 939 | } |
940 | ||
941 | static | |
e4bbeeb0 | 942 | void m4af_write_smhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 943 | { |
944 | m4af_write(ctx, | |
945 | "\0\0\0\020" /* size */ | |
946 | "smhd" /* type */ | |
947 | "\0" /* version */ | |
948 | "\0\0\0" /* flags */ | |
949 | "\0\0" /* balance */ | |
950 | "\0\0" /* reserved */ | |
951 | , 16); | |
952 | } | |
953 | ||
954 | static | |
e4bbeeb0 | 955 | void m4af_write_minf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 956 | { |
957 | m4af_track_t *track = &ctx->track[track_idx]; | |
958 | int64_t pos = m4af_tell(ctx); | |
959 | m4af_write(ctx, "\0\0\0\0minf", 8); | |
960 | /* TODO: add TEXT support */ | |
961 | if (track->codec != M4AF_CODEC_TEXT) | |
e4bbeeb0 | 962 | m4af_write_smhd_box(ctx, track_idx); |
963 | m4af_write_dinf_box(ctx, track_idx); | |
964 | m4af_write_stbl_box(ctx, track_idx); | |
965 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 966 | } |
967 | ||
968 | static | |
e4bbeeb0 | 969 | void m4af_write_mdhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 970 | { |
971 | m4af_track_t *track = &ctx->track[track_idx]; | |
972 | int64_t pos = m4af_tell(ctx); | |
f67cfe22 | 973 | uint8_t version = (track->creation_time > UINT32_MAX || |
974 | track->modification_time > UINT32_MAX || | |
975 | track->duration > UINT32_MAX); | |
48e2f01c | 976 | |
977 | m4af_write(ctx, "\0\0\0\0mdhd", 8); | |
978 | m4af_write(ctx, &version, 1); | |
979 | m4af_write(ctx, "\0\0\0", 3); /* flags */ | |
980 | if (version) { | |
981 | m4af_write64(ctx, track->creation_time); | |
982 | m4af_write64(ctx, track->modification_time); | |
983 | m4af_write32(ctx, track->timescale); | |
984 | m4af_write64(ctx, track->duration); | |
985 | } else { | |
986 | m4af_write32(ctx, track->creation_time); | |
987 | m4af_write32(ctx, track->modification_time); | |
988 | m4af_write32(ctx, track->timescale); | |
989 | m4af_write32(ctx, track->duration); | |
990 | } | |
991 | m4af_write(ctx, | |
992 | "\x55\xc4" /* language: und */ | |
993 | "\0\0" /* pre_defined */ | |
994 | , 4); | |
e4bbeeb0 | 995 | m4af_update_box_size(ctx, pos); |
48e2f01c | 996 | } |
997 | ||
998 | static | |
e4bbeeb0 | 999 | void m4af_write_hdlr_box(m4af_ctx_t *ctx, uint32_t track_idx, const char *type) |
48e2f01c | 1000 | { |
1001 | int64_t pos = m4af_tell(ctx); | |
1002 | static const char reserved_and_name[10] = { 0 }; | |
1003 | ||
1004 | m4af_write(ctx, | |
1005 | "\0\0\0\0" /* size */ | |
1006 | "hdlr" /* type */ | |
1007 | "\0" /* version */ | |
1008 | "\0\0\0" /* flags */ | |
1009 | "\0\0\0\0" /* pre_defined */ | |
1010 | , 16); | |
1011 | m4af_write(ctx, type, 4); /* handler_type */ | |
1012 | /* reserved[0] */ | |
1013 | m4af_write(ctx, !strcmp(type, "mdir") ? "appl" : "\0\0\0\0", 4); | |
1014 | /* reserved[1], reserved[2], name */ | |
1015 | m4af_write(ctx, reserved_and_name, (pos & 1) ? 9 : 10); | |
e4bbeeb0 | 1016 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1017 | } |
1018 | ||
1019 | static | |
e4bbeeb0 | 1020 | void m4af_write_mdia_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 1021 | { |
1022 | m4af_track_t *track = &ctx->track[track_idx]; | |
1023 | const char *hdlr = | |
1024 | (track->codec == M4AF_CODEC_TEXT) ? "text" : "soun"; | |
1025 | int64_t pos = m4af_tell(ctx); | |
1026 | m4af_write(ctx, "\0\0\0\0mdia", 8); | |
e4bbeeb0 | 1027 | m4af_write_mdhd_box(ctx, track_idx); |
1028 | m4af_write_hdlr_box(ctx, track_idx, hdlr); | |
1029 | m4af_write_minf_box(ctx, track_idx); | |
1030 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 1031 | } |
1032 | ||
d317e29d | 1033 | static |
1034 | void m4af_write_elst_box(m4af_ctx_t *ctx, uint32_t track_idx) | |
1035 | { | |
1036 | m4af_track_t *track = &ctx->track[track_idx]; | |
1037 | uint8_t version; | |
1038 | int64_t duration = track->duration - track->encoder_delay - track->padding; | |
1039 | int64_t pos = m4af_tell(ctx); | |
1040 | duration = (double)duration / track->timescale * ctx->timescale + .5; | |
1041 | version = (duration > UINT32_MAX); | |
1042 | ||
1043 | m4af_write(ctx, "\0\0\0\0elst", 8); | |
1044 | m4af_write(ctx, &version, 1); | |
1045 | m4af_write(ctx, "\0\0\0", 3); /* flags */ | |
1046 | m4af_write32(ctx, 1); /* entry_count: 1 */ | |
1047 | if (version) { | |
1048 | m4af_write64(ctx, duration); | |
1049 | m4af_write64(ctx, track->encoder_delay); | |
1050 | } else { | |
1051 | m4af_write32(ctx, duration); | |
1052 | m4af_write32(ctx, track->encoder_delay); | |
1053 | } | |
1054 | m4af_write16(ctx, 1); /* media_rate_integer */ | |
1055 | m4af_write16(ctx, 0); /* media_rate_fraction */ | |
1056 | m4af_update_box_size(ctx, pos); | |
1057 | } | |
1058 | ||
1059 | static | |
1060 | void m4af_write_edts_box(m4af_ctx_t *ctx, uint32_t track_idx) | |
1061 | { | |
d317e29d | 1062 | int64_t pos = m4af_tell(ctx); |
1063 | m4af_write(ctx, "\0\0\0\0edts", 8); | |
1064 | m4af_write_elst_box(ctx, track_idx); | |
1065 | m4af_update_box_size(ctx, pos); | |
1066 | } | |
1067 | ||
48e2f01c | 1068 | static |
e4bbeeb0 | 1069 | void m4af_write_tkhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 1070 | { |
1071 | m4af_track_t *track = &ctx->track[track_idx]; | |
1072 | int64_t pos = m4af_tell(ctx); | |
f67cfe22 | 1073 | int64_t duration = |
1074 | (double)track->duration / track->timescale * ctx->timescale + .5; | |
1075 | uint8_t version = (track->creation_time > UINT32_MAX || | |
1076 | track->modification_time > UINT32_MAX || | |
1077 | duration > UINT32_MAX); | |
48e2f01c | 1078 | m4af_write(ctx, "\0\0\0\0tkhd", 8); |
1079 | m4af_write(ctx, &version, 1); | |
1080 | m4af_write(ctx, "\0\0\007", 3); /* flags */ | |
1081 | if (version) { | |
1082 | m4af_write64(ctx, track->creation_time); | |
1083 | m4af_write64(ctx, track->modification_time); | |
1084 | m4af_write32(ctx, track_idx + 1); | |
1085 | m4af_write(ctx, "\0\0\0\0" /* reserved */ | |
1086 | , 4); | |
f67cfe22 | 1087 | m4af_write64(ctx, duration); |
48e2f01c | 1088 | } else { |
1089 | m4af_write32(ctx, track->creation_time); | |
1090 | m4af_write32(ctx, track->modification_time); | |
1091 | m4af_write32(ctx, track_idx + 1); | |
1092 | m4af_write(ctx, "\0\0\0\0" /* reserved */ | |
1093 | , 4); | |
f67cfe22 | 1094 | m4af_write32(ctx, duration); |
48e2f01c | 1095 | } |
1096 | m4af_write(ctx, | |
1097 | "\0\0\0\0" /* reserved[0] */ | |
1098 | "\0\0\0\0" /* reserved[1] */ | |
1099 | "\0\0" /* layer */ | |
1100 | "\0\0" /* alternate_group */ | |
1101 | "\001\0" /* volume: 1.0 */ | |
1102 | "\0\0" /* reserved */ | |
1103 | "\0\001\0\0" /* matrix[0] */ | |
1104 | "\0\0\0\0" /* matrix[1] */ | |
1105 | "\0\0\0\0" /* matrix[2] */ | |
1106 | "\0\0\0\0" /* matrix[3] */ | |
1107 | "\0\001\0\0" /* matrix[4] */ | |
1108 | "\0\0\0\0" /* matrix[5] */ | |
1109 | "\0\0\0\0" /* matrix[6] */ | |
1110 | "\0\0\0\0" /* matrix[7] */ | |
1111 | "\100\0\0\0" /* matrix[8] */ | |
1112 | "\0\0\0\0" /* width */ | |
1113 | "\0\0\0\0" /* height */ | |
1114 | , 60); | |
e4bbeeb0 | 1115 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1116 | } |
1117 | ||
1118 | static | |
e4bbeeb0 | 1119 | void m4af_write_trak_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c | 1120 | { |
d317e29d | 1121 | m4af_track_t *track = &ctx->track[track_idx]; |
48e2f01c | 1122 | int64_t pos = m4af_tell(ctx); |
1123 | m4af_write(ctx, "\0\0\0\0trak", 8); | |
e4bbeeb0 | 1124 | m4af_write_tkhd_box(ctx, track_idx); |
d317e29d | 1125 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_EDTS) && |
1126 | (track->encoder_delay || track->padding)) | |
1127 | m4af_write_edts_box(ctx, track_idx); | |
e4bbeeb0 | 1128 | m4af_write_mdia_box(ctx, track_idx); |
1129 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 1130 | } |
1131 | ||
1132 | static | |
e4bbeeb0 | 1133 | int64_t m4af_movie_duration(m4af_ctx_t *ctx) |
48e2f01c | 1134 | { |
1135 | int64_t movie_duration = 0; | |
1136 | unsigned i; | |
1137 | for (i = 0; i < ctx->num_tracks; ++i) { | |
1138 | double x = ctx->track[i].duration; | |
f67cfe22 | 1139 | int64_t duration = x / ctx->track[i].timescale * ctx->timescale + .5; |
48e2f01c | 1140 | if (duration > movie_duration) |
1141 | movie_duration = duration; | |
1142 | } | |
1143 | return movie_duration; | |
1144 | } | |
1145 | ||
1146 | static | |
e4bbeeb0 | 1147 | void m4af_write_mvhd_box(m4af_ctx_t *ctx) |
48e2f01c | 1148 | { |
1149 | int64_t pos = m4af_tell(ctx); | |
48e2f01c | 1150 | int64_t movie_duration = m4af_movie_duration(ctx); |
f67cfe22 | 1151 | uint8_t version = (ctx->creation_time > UINT32_MAX || |
1152 | ctx->modification_time > UINT32_MAX || | |
1153 | movie_duration > UINT32_MAX); | |
48e2f01c | 1154 | |
1155 | m4af_write(ctx, "\0\0\0\0mvhd", 8); | |
1156 | m4af_write(ctx, &version, 1); | |
1157 | m4af_write(ctx, "\0\0\0", 3); /* flags */ | |
1158 | if (version) { | |
1159 | m4af_write64(ctx, ctx->creation_time); | |
1160 | m4af_write64(ctx, ctx->modification_time); | |
1161 | m4af_write32(ctx, ctx->timescale); | |
1162 | m4af_write64(ctx, movie_duration); | |
1163 | } else { | |
1164 | m4af_write32(ctx, ctx->creation_time); | |
1165 | m4af_write32(ctx, ctx->modification_time); | |
1166 | m4af_write32(ctx, ctx->timescale); | |
1167 | m4af_write32(ctx, movie_duration); | |
1168 | } | |
1169 | m4af_write(ctx, | |
1170 | "\0\001\0\0" /* rate: 1.0 */ | |
1171 | "\001\0" /* volume: 1.0 */ | |
1172 | "\0\0" /* reserved */ | |
1173 | "\0\0\0\0" /* reserved[0] */ | |
1174 | "\0\0\0\0" /* reserved[1] */ | |
1175 | "\0\001\0\0" /* matrix[0] */ | |
1176 | "\0\0\0\0" /* matrix[1] */ | |
1177 | "\0\0\0\0" /* matrix[2] */ | |
1178 | "\0\0\0\0" /* matrix[3] */ | |
1179 | "\0\001\0\0" /* matrix[4] */ | |
1180 | "\0\0\0\0" /* matrix[5] */ | |
1181 | "\0\0\0\0" /* matrix[6] */ | |
1182 | "\0\0\0\0" /* matrix[7] */ | |
1183 | "\100\0\0\0" /* matrix[8] */ | |
1184 | "\0\0\0\0" /* pre_defined[0] */ | |
1185 | "\0\0\0\0" /* pre_defined[1] */ | |
1186 | "\0\0\0\0" /* pre_defined[2] */ | |
1187 | "\0\0\0\0" /* pre_defined[3] */ | |
1188 | "\0\0\0\0" /* pre_defined[4] */ | |
1189 | "\0\0\0\0" /* pre_defined[5] */ | |
1190 | , 76); | |
1191 | m4af_write32(ctx, ctx->num_tracks + 1); | |
e4bbeeb0 | 1192 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1193 | } |
1194 | ||
1195 | static | |
e4bbeeb0 | 1196 | void m4af_write_mean_box(m4af_ctx_t *ctx) |
48e2f01c | 1197 | { |
1198 | m4af_write(ctx, | |
1199 | "\0\0\0\034" /* size */ | |
1200 | "mean" | |
1201 | "\0" /* version */ | |
1202 | "\0\0\0" /* flags */ | |
1203 | "com.apple.iTunes" /* meaning-string */ | |
1204 | , 28); | |
1205 | } | |
1206 | ||
1207 | static | |
e4bbeeb0 | 1208 | void m4af_write_name_box(m4af_ctx_t *ctx, const char *name) |
48e2f01c | 1209 | { |
1210 | int64_t pos = m4af_tell(ctx); | |
1211 | m4af_write(ctx, | |
1212 | "\0\0\0\0" /* size */ | |
1213 | "name" /* type */ | |
1214 | "\0" /* version */ | |
1215 | "\0\0\0" /* flags */ | |
1216 | , 12); | |
1217 | m4af_write(ctx, name, strlen(name)); | |
e4bbeeb0 | 1218 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1219 | } |
1220 | ||
1221 | static | |
e4bbeeb0 | 1222 | void m4af_write_data_box(m4af_ctx_t *ctx, uint32_t type_code, |
1223 | const char *data, uint32_t data_size) | |
48e2f01c | 1224 | { |
1225 | int64_t pos = m4af_tell(ctx); | |
1226 | uint8_t code = type_code; | |
1227 | m4af_write(ctx, | |
1228 | "\0\0\0\0" /* size */ | |
1229 | "data" /* type */ | |
1230 | "\0\0" /* reserved */ | |
1231 | "\0" /* type_set_indifier */ | |
1232 | ,11); | |
1233 | m4af_write(ctx, &code, 1); | |
1234 | m4af_write(ctx, "\0\0\0\0", 4); /* locale */ | |
1235 | m4af_write(ctx, data, data_size); | |
e4bbeeb0 | 1236 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1237 | } |
1238 | ||
1239 | static | |
e4bbeeb0 | 1240 | void m4af_write_metadata(m4af_ctx_t *ctx, m4af_itmf_entry_t *entry) |
48e2f01c | 1241 | { |
1242 | int64_t pos = m4af_tell(ctx); | |
1243 | m4af_write(ctx, "\0\0\0\0", 4); | |
e4bbeeb0 | 1244 | m4af_write32(ctx, entry->fcc); |
1245 | if (entry->fcc != M4AF_FOURCC('-','-','-','-')) | |
1246 | m4af_write_data_box(ctx, entry->type_code, | |
1247 | entry->data, entry->data_size); | |
48e2f01c | 1248 | else { |
e4bbeeb0 | 1249 | m4af_write_mean_box(ctx); |
1250 | m4af_write_name_box(ctx, entry->name); | |
1251 | m4af_write_data_box(ctx, 1, entry->data, entry->data_size); | |
48e2f01c | 1252 | } |
e4bbeeb0 | 1253 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1254 | } |
1255 | ||
1256 | static | |
e4bbeeb0 | 1257 | void m4af_write_ilst_box(m4af_ctx_t *ctx) |
48e2f01c | 1258 | { |
1259 | uint32_t i; | |
1260 | int64_t pos = m4af_tell(ctx); | |
1261 | m4af_write(ctx, "\0\0\0\0ilst", 8); | |
1262 | for (i = 0; i < ctx->num_tags; ++i) | |
1263 | m4af_write_metadata(ctx, &ctx->itmf_table[i]); | |
e4bbeeb0 | 1264 | m4af_update_box_size(ctx, pos); |
48e2f01c | 1265 | } |
1266 | ||
1267 | static | |
e4bbeeb0 | 1268 | void m4af_write_meta_box(m4af_ctx_t *ctx) |
48e2f01c | 1269 | { |
1270 | int64_t pos = m4af_tell(ctx); | |
1271 | m4af_write(ctx, | |
1272 | "\0\0\0\0" /* size */ | |
1273 | "meta" /* type */ | |
1274 | "\0" /* version */ | |
1275 | "\0\0\0" /* flags */ | |
1276 | , 12); | |
e4bbeeb0 | 1277 | m4af_write_hdlr_box(ctx, 0, "mdir"); |
1278 | m4af_write_ilst_box(ctx); | |
1279 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 1280 | } |
1281 | ||
1282 | static | |
e4bbeeb0 | 1283 | void m4af_write_udta_box(m4af_ctx_t *ctx) |
48e2f01c | 1284 | { |
1285 | int64_t pos = m4af_tell(ctx); | |
1286 | m4af_write(ctx, "\0\0\0\0udta", 8); | |
e4bbeeb0 | 1287 | m4af_write_meta_box(ctx); |
1288 | m4af_update_box_size(ctx, pos); | |
48e2f01c | 1289 | } |
1290 | ||
1291 | static | |
fb2b3635 | 1292 | uint32_t m4af_write_moov_box(m4af_ctx_t *ctx) |
48e2f01c | 1293 | { |
1294 | unsigned i; | |
1295 | int64_t pos = m4af_tell(ctx); | |
1296 | m4af_write(ctx, "\0\0\0\0moov", 8); | |
e4bbeeb0 | 1297 | m4af_write_mvhd_box(ctx); |
48e2f01c | 1298 | for (i = 0; i < ctx->num_tracks; ++i) |
e4bbeeb0 | 1299 | m4af_write_trak_box(ctx, i); |
48e2f01c | 1300 | if (ctx->num_tags) |
e4bbeeb0 | 1301 | m4af_write_udta_box(ctx); |
fb2b3635 | 1302 | return m4af_update_box_size(ctx, pos); |
48e2f01c | 1303 | } |
1304 | ||
1305 | static | |
e4bbeeb0 | 1306 | void m4af_finalize_mdat(m4af_ctx_t *ctx) |
48e2f01c | 1307 | { |
1308 | if (ctx->mdat_size + 8 > UINT32_MAX) { | |
1309 | m4af_set_pos(ctx, ctx->mdat_pos - 16); | |
1310 | m4af_write32(ctx, 1); | |
1311 | m4af_write(ctx, "mdat", 4); | |
1312 | m4af_write64(ctx, ctx->mdat_size + 16); | |
1313 | } else { | |
1314 | m4af_set_pos(ctx, ctx->mdat_pos - 8); | |
1315 | m4af_write32(ctx, ctx->mdat_size + 8); | |
1316 | } | |
1317 | m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size); | |
1318 | } | |
1319 | ||
fb2b3635 | 1320 | static |
1321 | void m4af_shift_mdat_pos(m4af_ctx_t *ctx, uint32_t offset) | |
1322 | { | |
1323 | unsigned i, j; | |
1324 | int64_t begin, end; | |
1325 | char buf[8192]; | |
1326 | ||
1327 | end = ctx->mdat_pos + ctx->mdat_size; | |
1328 | for (; (begin = m4af_max(ctx->mdat_pos, end - 8192)) < end; end = begin) { | |
1329 | m4af_set_pos(ctx, begin); | |
1330 | ctx->io.read(ctx->io_cookie, buf, end - begin); | |
1331 | m4af_set_pos(ctx, begin + offset); | |
1332 | m4af_write(ctx, buf, end - begin); | |
1333 | } | |
1334 | for (i = 0; i < ctx->num_tracks; ++i) | |
1335 | for (j = 0; j < ctx->track[i].num_chunks; ++j) | |
1336 | ctx->track[i].chunk_table[j].offset += offset; | |
1337 | ctx->mdat_pos += offset; | |
1338 | m4af_set_pos(ctx, ctx->mdat_pos - 16); | |
1339 | m4af_write_free_box(ctx, 0); | |
1340 | m4af_write(ctx, "\0\0\0\0mdat", 8); | |
1341 | m4af_finalize_mdat(ctx); | |
1342 | } | |
1343 | ||
1344 | int m4af_finalize(m4af_ctx_t *ctx, int optimize) | |
48e2f01c | 1345 | { |
1346 | unsigned i; | |
1347 | m4af_track_t *track; | |
fb2b3635 | 1348 | uint32_t moov_size; |
48e2f01c | 1349 | |
1350 | for (i = 0; i < ctx->num_tracks; ++i) { | |
1351 | track = ctx->track + i; | |
1352 | if (track->duration) { | |
1353 | int64_t track_size = 0; | |
7b1f2136 | 1354 | unsigned j; |
48e2f01c | 1355 | for (j = 0; j < track->num_chunks; ++j) |
1356 | track_size += track->chunk_table[j].size; | |
1357 | track->avgBitrate = | |
1358 | 8.0 * track_size * track->timescale / track->duration + .5; | |
1359 | } | |
1360 | m4af_flush_chunk(ctx, i); | |
1361 | } | |
d317e29d | 1362 | track = ctx->track; |
1363 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_ITUNSMPB) && | |
1364 | (track->encoder_delay || track->padding)) | |
48e2f01c | 1365 | m4af_set_iTunSMPB(ctx); |
1366 | m4af_finalize_mdat(ctx); | |
fb2b3635 | 1367 | moov_size = m4af_write_moov_box(ctx); |
1368 | if (optimize) { | |
1369 | int64_t pos; | |
1370 | m4af_shift_mdat_pos(ctx, moov_size + 1024); | |
1371 | m4af_set_pos(ctx, 32); | |
1372 | m4af_write_moov_box(ctx); | |
1373 | pos = m4af_tell(ctx); | |
1374 | m4af_write_free_box(ctx, ctx->mdat_pos - pos - 24); | |
1375 | } | |
e4bbeeb0 | 1376 | return ctx->last_error; |
48e2f01c | 1377 | } |