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; |
45 | int64_t creation_time; |
46 | int64_t modification_time; |
47 | int64_t duration; |
48 | uint32_t frame_duration; |
49 | uint32_t encoder_delay; |
50 | uint32_t padding; |
51 | uint8_t *decSpecificInfo; |
52 | uint32_t decSpecificInfoSize; |
53 | uint32_t bufferSizeDB; |
54 | uint32_t maxBitrate; |
55 | uint32_t avgBitrate; |
56 | |
57 | m4af_sample_entry_t *sample_table; |
58 | uint32_t num_samples; |
59 | uint32_t sample_table_capacity; |
60 | |
61 | m4af_chunk_entry_t *chunk_table; |
62 | uint32_t num_chunks; |
63 | uint32_t chunk_table_capacity; |
64 | |
65 | uint8_t *chunk_buffer; |
66 | uint32_t chunk_size; |
67 | uint32_t chunk_capacity; |
e4bbeeb0 |
68 | |
69 | /* temporary, to help parsing */ |
70 | uint64_t stsc_pos; |
71 | uint64_t stsc_size; |
72 | |
73 | uint64_t stts_pos; |
74 | uint64_t stts_size; |
48e2f01c |
75 | } m4af_track_t; |
76 | |
e4bbeeb0 |
77 | struct m4af_ctx_t { |
48e2f01c |
78 | uint32_t timescale; |
79 | int64_t creation_time; |
80 | int64_t modification_time; |
81 | int64_t mdat_pos; |
82 | int64_t mdat_size; |
d317e29d |
83 | int priming_mode; |
48e2f01c |
84 | int last_error; |
85 | |
86 | m4af_itmf_entry_t *itmf_table; |
87 | uint32_t num_tags; |
88 | uint32_t itmf_table_capacity; |
89 | |
90 | m4af_io_callbacks_t io; |
91 | void *io_cookie; |
92 | |
93 | uint16_t num_tracks; |
e4bbeeb0 |
94 | m4af_track_t track[2]; |
95 | |
96 | m4af_itmf_entry_t current_tag; |
48e2f01c |
97 | }; |
98 | |
e4bbeeb0 |
99 | typedef struct m4af_box_parser_t { |
100 | uint32_t name; |
101 | int (*handler)(m4af_ctx_t *ctx, uint32_t name, uint64_t size); |
102 | } m4af_box_parser_t; |
103 | |
48e2f01c |
104 | static |
105 | int64_t m4af_timestamp(void) |
106 | { |
107 | return (int64_t)(time(0)) + (((1970 - 1904) * 365) + 17) * 24 * 60 * 60; |
108 | } |
109 | |
110 | /* |
111 | * http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 |
112 | */ |
113 | static |
114 | uint32_t m4af_roundup(uint32_t n) |
115 | { |
116 | n--; |
117 | n |= n >> 1; |
118 | n |= n >> 2; |
119 | n |= n >> 4; |
120 | n |= n >> 8; |
121 | n |= n >> 16; |
122 | n++; |
123 | return n; |
124 | } |
125 | |
126 | static |
e4bbeeb0 |
127 | int64_t m4af_tell(m4af_ctx_t *ctx) |
48e2f01c |
128 | { |
129 | int64_t pos = -1; |
e4bbeeb0 |
130 | if ((pos = ctx->io.tell(ctx->io_cookie)) < 0) |
48e2f01c |
131 | ctx->last_error = M4AF_IO_ERROR; |
132 | return pos; |
133 | } |
134 | |
135 | static |
e4bbeeb0 |
136 | int m4af_set_pos(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c |
137 | { |
138 | int rc = -1; |
e4bbeeb0 |
139 | if ((rc = ctx->io.seek(ctx->io_cookie, pos, SEEK_SET)) < 0) |
48e2f01c |
140 | ctx->last_error = M4AF_IO_ERROR; |
141 | return rc; |
142 | } |
143 | |
144 | static |
e4bbeeb0 |
145 | int m4af_write(m4af_ctx_t *ctx, const void *data, uint32_t size) |
48e2f01c |
146 | { |
147 | int rc = -1; |
e4bbeeb0 |
148 | if ((rc = ctx->io.write(ctx->io_cookie, data, size)) < 0) |
48e2f01c |
149 | ctx->last_error = M4AF_IO_ERROR; |
150 | return rc; |
151 | } |
152 | |
d317e29d |
153 | static |
154 | int m4af_write16(m4af_ctx_t *ctx, uint32_t data) |
155 | { |
156 | data = m4af_htob16(data); |
157 | return m4af_write(ctx, &data, 2); |
158 | } |
159 | |
48e2f01c |
160 | static |
e4bbeeb0 |
161 | int m4af_write32(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c |
162 | { |
163 | data = m4af_htob32(data); |
164 | return m4af_write(ctx, &data, 4); |
165 | } |
166 | |
167 | static |
e4bbeeb0 |
168 | int m4af_write64(m4af_ctx_t *ctx, uint64_t data) |
48e2f01c |
169 | { |
170 | data = m4af_htob64(data); |
171 | return m4af_write(ctx, &data, 8); |
172 | } |
173 | |
174 | static |
e4bbeeb0 |
175 | int m4af_write24(m4af_ctx_t *ctx, uint32_t data) |
48e2f01c |
176 | { |
177 | data = m4af_htob32(data << 8); |
178 | return m4af_write(ctx, &data, 3); |
179 | } |
180 | |
181 | static |
e4bbeeb0 |
182 | void m4af_write32_at(m4af_ctx_t *ctx, int64_t pos, uint32_t value) |
48e2f01c |
183 | { |
184 | int64_t current_pos = m4af_tell(ctx); |
185 | m4af_set_pos(ctx, pos); |
186 | m4af_write32(ctx, value); |
187 | m4af_set_pos(ctx, current_pos); |
188 | } |
189 | |
e4bbeeb0 |
190 | m4af_ctx_t *m4af_create(uint32_t codec, uint32_t timescale, |
191 | m4af_io_callbacks_t *io, void *io_cookie) |
48e2f01c |
192 | { |
e4bbeeb0 |
193 | m4af_ctx_t *ctx; |
48e2f01c |
194 | int64_t timestamp; |
195 | |
196 | if (codec != M4AF_FOURCC('m','p','4','a') && |
197 | codec != M4AF_FOURCC('a','l','a','c')) |
198 | return 0; |
e4bbeeb0 |
199 | if ((ctx = m4af_realloc(0, sizeof(m4af_ctx_t))) == 0) |
48e2f01c |
200 | return 0; |
e4bbeeb0 |
201 | memset(ctx, 0, sizeof(m4af_ctx_t)); |
48e2f01c |
202 | memcpy(&ctx->io, io, sizeof(m4af_io_callbacks_t)); |
203 | ctx->io_cookie = io_cookie; |
204 | ctx->timescale = timescale; |
205 | timestamp = m4af_timestamp(); |
206 | ctx->creation_time = timestamp; |
207 | ctx->modification_time = timestamp; |
208 | ctx->num_tracks = 1; |
209 | ctx->track[0].codec = codec; |
210 | ctx->track[0].timescale = timescale; |
211 | ctx->track[0].creation_time = timestamp; |
212 | ctx->track[0].modification_time = timestamp; |
213 | return ctx; |
214 | } |
215 | |
e4bbeeb0 |
216 | static |
217 | void m4af_free_itmf_table(m4af_ctx_t *ctx) |
218 | { |
219 | uint32_t i; |
220 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
221 | for (i = 0; i < ctx->num_tags; ++i, ++entry) { |
222 | if (entry->fcc == M4AF_FOURCC('-','-','-','-')) |
223 | m4af_free(entry->name); |
224 | m4af_free(entry->data); |
225 | } |
226 | m4af_free(ctx->itmf_table); |
227 | } |
228 | |
229 | static |
230 | void m4af_clear_track(m4af_ctx_t *ctx, int track_idx) |
231 | { |
232 | m4af_track_t *track = ctx->track + track_idx; |
233 | if (track->decSpecificInfo) |
234 | m4af_free(track->decSpecificInfo); |
235 | if (track->sample_table) |
236 | m4af_free(track->sample_table); |
237 | if (track->chunk_table) |
238 | m4af_free(track->chunk_table); |
239 | if (track->chunk_buffer) |
240 | m4af_free(track->chunk_buffer); |
241 | memset(track, 0, sizeof(m4af_track_t)); |
242 | } |
243 | |
244 | void m4af_teardown(m4af_ctx_t **ctxp) |
245 | { |
246 | unsigned i; |
247 | m4af_ctx_t *ctx = *ctxp; |
248 | for (i = 0; i < ctx->num_tracks; ++i) |
249 | m4af_clear_track(ctx, i); |
250 | if (ctx->itmf_table) |
251 | m4af_free_itmf_table(ctx); |
252 | m4af_free(ctx); |
253 | *ctxp = 0; |
254 | } |
255 | |
256 | void m4af_set_fixed_frame_duration(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
257 | uint32_t length) |
258 | { |
259 | ctx->track[track_idx].frame_duration = length; |
260 | } |
261 | |
e4bbeeb0 |
262 | int m4af_set_decoder_specific_info(m4af_ctx_t *ctx, uint32_t track_idx, |
263 | uint8_t *data, uint32_t size) |
48e2f01c |
264 | { |
265 | m4af_track_t *track = &ctx->track[track_idx]; |
266 | if (size > track->decSpecificInfoSize) { |
267 | uint8_t *memory = m4af_realloc(track->decSpecificInfo, size); |
268 | if (memory == 0) { |
269 | ctx->last_error = M4AF_NO_MEMORY; |
e4bbeeb0 |
270 | goto DONE; |
48e2f01c |
271 | } |
272 | track->decSpecificInfo = memory; |
273 | } |
274 | if (size > 0) |
275 | memcpy(track->decSpecificInfo, data, size); |
276 | track->decSpecificInfoSize = size; |
e4bbeeb0 |
277 | DONE: |
278 | return ctx->last_error; |
48e2f01c |
279 | } |
280 | |
e4bbeeb0 |
281 | void m4af_set_priming(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
282 | uint32_t encoder_delay, uint32_t padding) |
283 | { |
284 | m4af_track_t *track = &ctx->track[track_idx]; |
285 | track->encoder_delay = encoder_delay; |
286 | track->padding = padding; |
287 | } |
288 | |
d317e29d |
289 | void m4af_set_priming_mode(m4af_ctx_t *ctx, int mode) |
290 | { |
291 | ctx->priming_mode = mode; |
292 | } |
293 | |
48e2f01c |
294 | static |
e4bbeeb0 |
295 | int m4af_add_sample_entry(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
296 | uint32_t size, uint32_t delta) |
297 | { |
298 | m4af_track_t *track = &ctx->track[track_idx]; |
299 | m4af_sample_entry_t *entry; |
300 | |
301 | if (ctx->last_error) |
302 | return -1; |
303 | if (track->num_samples == track->sample_table_capacity) { |
304 | uint32_t new_size = track->sample_table_capacity; |
305 | new_size = new_size ? new_size * 2 : 1; |
306 | entry = m4af_realloc(track->sample_table, new_size * sizeof(*entry)); |
307 | if (entry == 0) { |
308 | ctx->last_error = M4AF_NO_MEMORY; |
309 | return -1; |
310 | } |
311 | track->sample_table = entry; |
312 | track->sample_table_capacity = new_size; |
313 | } |
314 | entry = track->sample_table + track->num_samples; |
315 | entry->size = size; |
316 | entry->delta = delta; |
317 | ++track->num_samples; |
318 | return 0; |
319 | } |
320 | |
321 | static |
e4bbeeb0 |
322 | int m4af_flush_chunk(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
323 | { |
324 | m4af_track_t *track = &ctx->track[track_idx]; |
325 | m4af_chunk_entry_t *entry; |
326 | if (!track->num_chunks || !track->chunk_size) |
327 | return 0; |
328 | entry = &track->chunk_table[track->num_chunks - 1]; |
329 | entry->offset = m4af_tell(ctx); |
330 | m4af_write(ctx, track->chunk_buffer, track->chunk_size); |
331 | ctx->mdat_size += track->chunk_size; |
332 | track->chunk_size = 0; |
333 | return ctx->last_error ? -1 : 0; |
334 | } |
335 | |
336 | static |
e4bbeeb0 |
337 | int m4af_add_chunk_entry(m4af_ctx_t *ctx, uint32_t track_idx) |
338 | { |
339 | m4af_track_t *track = &ctx->track[track_idx]; |
340 | m4af_chunk_entry_t *entry; |
341 | if (track->num_chunks == track->chunk_table_capacity) { |
342 | uint32_t new_size = track->chunk_table_capacity; |
343 | new_size = new_size ? new_size * 2 : 1; |
344 | entry = m4af_realloc(track->chunk_table, new_size * sizeof(*entry)); |
345 | if (entry == 0) { |
346 | ctx->last_error = M4AF_NO_MEMORY; |
347 | return -1; |
348 | } |
349 | track->chunk_table = entry; |
350 | track->chunk_table_capacity = new_size; |
351 | } |
352 | memset(&track->chunk_table[track->num_chunks++], 0, |
353 | sizeof(m4af_chunk_entry_t)); |
354 | return 0; |
355 | } |
356 | |
357 | static |
358 | int m4af_update_chunk_table(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
359 | uint32_t size, uint32_t delta) |
360 | { |
361 | m4af_track_t *track = &ctx->track[track_idx]; |
362 | m4af_chunk_entry_t *entry; |
363 | int add_new_chunk = 0; |
364 | |
365 | if (ctx->last_error) |
366 | return -1; |
367 | if (track->num_chunks == 0) |
368 | add_new_chunk = 1; |
369 | else { |
370 | entry = &track->chunk_table[track->num_chunks - 1]; |
371 | if (entry->duration + delta > track->timescale / 2) |
372 | add_new_chunk = 1; |
373 | } |
374 | if (add_new_chunk) { |
375 | m4af_flush_chunk(ctx, track_idx); |
e4bbeeb0 |
376 | if (m4af_add_chunk_entry(ctx, track_idx) < 0) |
377 | return -1; |
48e2f01c |
378 | } |
379 | entry = &track->chunk_table[track->num_chunks - 1]; |
380 | entry->size += size; |
381 | ++entry->samples_per_chunk; |
382 | entry->duration += delta; |
383 | return 0; |
384 | } |
385 | |
386 | static |
e4bbeeb0 |
387 | void m4af_update_max_bitrate(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
388 | { |
389 | m4af_track_t *track = &ctx->track[track_idx]; |
390 | uint32_t duration = 0, size = 0, bitrate; |
391 | m4af_sample_entry_t *ent = track->sample_table + track->num_samples - 1; |
392 | |
393 | for (; ent >= track->sample_table && duration < track->timescale; --ent) { |
394 | duration += ent->delta; |
395 | size += ent->size; |
396 | } |
397 | bitrate = (uint32_t)(size * 8.0 * track->timescale / duration + .5); |
398 | if (bitrate > track->maxBitrate) |
399 | track->maxBitrate = bitrate; |
400 | } |
401 | |
402 | static |
e4bbeeb0 |
403 | int m4af_append_sample_to_chunk(m4af_ctx_t *ctx, uint32_t track_idx, |
48e2f01c |
404 | const void *data, uint32_t size) |
405 | { |
406 | m4af_track_t *track = &ctx->track[track_idx]; |
407 | uint32_t newsize = track->chunk_size + size; |
408 | |
409 | if (ctx->last_error) |
410 | return -1; |
411 | if (track->chunk_capacity < newsize) { |
412 | uint32_t capacity = m4af_roundup(newsize); |
413 | uint8_t *memory = realloc(track->chunk_buffer, capacity); |
414 | if (!memory) { |
415 | ctx->last_error = M4AF_NO_MEMORY; |
416 | return -1; |
417 | } |
418 | track->chunk_buffer = memory; |
419 | track->chunk_capacity = capacity; |
420 | } |
421 | memcpy(track->chunk_buffer + track->chunk_size, data, size); |
422 | track->chunk_size = newsize; |
423 | return 0; |
424 | } |
425 | |
e4bbeeb0 |
426 | int m4af_write_sample(m4af_ctx_t *ctx, uint32_t track_idx, const void *data, |
48e2f01c |
427 | uint32_t size, uint32_t duration) |
428 | { |
429 | m4af_track_t *track = &ctx->track[track_idx]; |
430 | if (track->frame_duration) |
431 | duration = track->frame_duration; |
432 | if (size > track->bufferSizeDB) |
433 | track->bufferSizeDB = size; |
434 | track->duration += duration; |
435 | m4af_add_sample_entry(ctx, track_idx, size, duration); |
436 | m4af_update_chunk_table(ctx, track_idx, size, duration); |
437 | m4af_update_max_bitrate(ctx, track_idx); |
438 | m4af_append_sample_to_chunk(ctx, track_idx, data, size); |
e4bbeeb0 |
439 | return ctx->last_error; |
48e2f01c |
440 | } |
441 | |
442 | static |
93fb917b |
443 | m4af_itmf_entry_t *m4af_find_itmf_slot(m4af_ctx_t *ctx, uint32_t fcc, |
444 | const char *name) |
48e2f01c |
445 | { |
93fb917b |
446 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
447 | |
448 | if (name) |
449 | fcc = M4AF_FOURCC('-','-','-','-'); |
450 | |
451 | if (fcc != M4AF_TAG_ARTWORK) |
452 | for (; entry != ctx->itmf_table + ctx->num_tags; ++entry) |
453 | if (fcc == entry->fcc && (!name || !strcmp(name, entry->name))) |
454 | return entry; |
455 | |
48e2f01c |
456 | if (ctx->num_tags == ctx->itmf_table_capacity) { |
457 | uint32_t new_size = ctx->itmf_table_capacity; |
458 | new_size = new_size ? new_size * 2 : 1; |
459 | entry = m4af_realloc(ctx->itmf_table, new_size * sizeof(*entry)); |
460 | if (entry == 0) { |
461 | ctx->last_error = M4AF_NO_MEMORY; |
93fb917b |
462 | return 0; |
48e2f01c |
463 | } |
464 | ctx->itmf_table = entry; |
465 | ctx->itmf_table_capacity = new_size; |
466 | } |
93fb917b |
467 | entry = &ctx->itmf_table[ctx->num_tags++]; |
468 | memset(entry, 0, sizeof(m4af_itmf_entry_t)); |
469 | entry->fcc = fcc; |
470 | if (name) { |
471 | char *name_copy = m4af_realloc(0, strlen(name) + 1); |
472 | if (!name_copy) { |
473 | ctx->last_error = M4AF_NO_MEMORY; |
474 | --ctx->num_tags; |
475 | return 0; |
476 | } |
477 | strcpy(name_copy, name); |
478 | entry->name = name_copy; |
479 | } |
480 | return entry; |
48e2f01c |
481 | } |
482 | |
e4bbeeb0 |
483 | int m4af_add_itmf_long_tag(m4af_ctx_t *ctx, const char *name, |
48e2f01c |
484 | const char *data) |
485 | { |
486 | m4af_itmf_entry_t *entry; |
93fb917b |
487 | char *data_copy = 0; |
48e2f01c |
488 | size_t name_len = strlen(name); |
489 | size_t data_len = strlen(data); |
93fb917b |
490 | if (!name_len || !data_len) |
491 | return 0; |
492 | |
493 | if ((entry = m4af_find_itmf_slot(ctx, 0, name)) == 0) |
494 | goto FAIL; |
495 | entry->type_code = M4AF_UTF8; |
496 | if ((data_copy = m4af_realloc(entry->data, data_len)) == 0) { |
48e2f01c |
497 | ctx->last_error = M4AF_NO_MEMORY; |
498 | goto FAIL; |
499 | } |
48e2f01c |
500 | memcpy(data_copy, data, data_len); |
48e2f01c |
501 | entry->data = data_copy; |
502 | entry->data_size = data_len; |
503 | return 0; |
504 | FAIL: |
e4bbeeb0 |
505 | return ctx->last_error; |
48e2f01c |
506 | } |
507 | |
e4bbeeb0 |
508 | int m4af_add_itmf_short_tag(m4af_ctx_t *ctx, uint32_t fcc, |
48e2f01c |
509 | uint32_t type_code, const void *data, |
510 | uint32_t data_size) |
511 | { |
512 | m4af_itmf_entry_t *entry; |
93fb917b |
513 | char *data_copy = 0; |
514 | |
515 | if (!data_size) |
516 | return 0; |
517 | if ((entry = m4af_find_itmf_slot(ctx, fcc, 0)) == 0) |
518 | goto FAIL; |
519 | entry->type_code = type_code; |
520 | if ((data_copy = m4af_realloc(entry->data, data_size)) == 0) { |
48e2f01c |
521 | ctx->last_error = M4AF_NO_MEMORY; |
522 | goto FAIL; |
523 | } |
48e2f01c |
524 | memcpy(data_copy, data, data_size); |
525 | entry->data = data_copy; |
526 | entry->data_size = data_size; |
527 | return 0; |
528 | FAIL: |
e4bbeeb0 |
529 | return ctx->last_error; |
48e2f01c |
530 | } |
531 | |
e4bbeeb0 |
532 | int m4af_add_itmf_string_tag(m4af_ctx_t *ctx, uint32_t fcc, const char *data) |
48e2f01c |
533 | { |
e4bbeeb0 |
534 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_UTF8, data, strlen(data)); |
48e2f01c |
535 | } |
536 | |
e4bbeeb0 |
537 | int m4af_add_itmf_int8_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c |
538 | { |
539 | uint8_t data = value; |
e4bbeeb0 |
540 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 1); |
48e2f01c |
541 | } |
542 | |
e4bbeeb0 |
543 | int m4af_add_itmf_int16_tag(m4af_ctx_t *ctx, uint32_t fcc, int value) |
48e2f01c |
544 | { |
545 | uint16_t data = m4af_htob16(value); |
e4bbeeb0 |
546 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 2); |
48e2f01c |
547 | } |
548 | |
e4bbeeb0 |
549 | int m4af_add_itmf_int32_tag(m4af_ctx_t *ctx, uint32_t fcc, uint32_t value) |
48e2f01c |
550 | { |
551 | uint32_t data = m4af_htob32(value); |
e4bbeeb0 |
552 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 4); |
48e2f01c |
553 | } |
554 | |
e4bbeeb0 |
555 | int m4af_add_itmf_int64_tag(m4af_ctx_t *ctx, uint32_t fcc, uint64_t value) |
c5c45908 |
556 | { |
557 | uint64_t data = m4af_htob64(value); |
e4bbeeb0 |
558 | return m4af_add_itmf_short_tag(ctx, fcc, M4AF_INTEGER, &data, 8); |
c5c45908 |
559 | } |
560 | |
e4bbeeb0 |
561 | int m4af_add_itmf_track_tag(m4af_ctx_t *ctx, int track, int total) |
48e2f01c |
562 | { |
563 | uint16_t data[4] = { 0 }; |
564 | data[1] = m4af_htob16(track); |
565 | data[2] = m4af_htob16(total); |
566 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('t','r','k','n'), |
567 | M4AF_IMPLICIT, &data, 8); |
568 | } |
569 | |
e4bbeeb0 |
570 | int m4af_add_itmf_disk_tag(m4af_ctx_t *ctx, int disk, int total) |
48e2f01c |
571 | { |
572 | uint16_t data[3] = { 0 }; |
573 | data[1] = m4af_htob16(disk); |
574 | data[2] = m4af_htob16(total); |
575 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('d','i','s','k'), |
576 | M4AF_IMPLICIT, &data, 6); |
577 | } |
578 | |
e4bbeeb0 |
579 | int m4af_add_itmf_genre_tag(m4af_ctx_t *ctx, int genre) |
48e2f01c |
580 | { |
581 | uint16_t data = m4af_htob16(genre); |
582 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('g','n','r','e'), |
583 | M4AF_IMPLICIT, &data, 2); |
584 | } |
585 | |
586 | static |
e4bbeeb0 |
587 | int m4af_set_iTunSMPB(m4af_ctx_t *ctx) |
48e2f01c |
588 | { |
e4bbeeb0 |
589 | const char *fmt = " 00000000 %08X %08X %08X%08X 00000000 00000000 " |
48e2f01c |
590 | "00000000 00000000 00000000 00000000 00000000 00000000"; |
591 | m4af_track_t *track = &ctx->track[0]; |
592 | char buf[256]; |
593 | uint64_t length = track->duration - track->encoder_delay - track->padding; |
e4bbeeb0 |
594 | sprintf(buf, fmt, track->encoder_delay, track->padding, |
48e2f01c |
595 | (uint32_t)(length >> 32), (uint32_t)length); |
596 | return m4af_add_itmf_long_tag(ctx, "iTunSMPB", buf); |
597 | } |
598 | |
599 | static |
fb2b3635 |
600 | uint32_t m4af_update_box_size(m4af_ctx_t *ctx, int64_t pos) |
48e2f01c |
601 | { |
602 | int64_t current_pos = m4af_tell(ctx); |
603 | m4af_set_pos(ctx, pos); |
604 | m4af_write32(ctx, current_pos - pos); |
605 | m4af_set_pos(ctx, current_pos); |
fb2b3635 |
606 | return current_pos - pos; |
48e2f01c |
607 | } |
608 | |
48e2f01c |
609 | static |
e4bbeeb0 |
610 | void m4af_write_descriptor(m4af_ctx_t *ctx, uint32_t tag, uint32_t size) |
48e2f01c |
611 | { |
612 | uint8_t buf[5]; |
613 | buf[0] = tag; |
614 | buf[1] = ((size >> 21) | 0x80); |
615 | buf[2] = ((size >> 14) | 0x80); |
616 | buf[3] = ((size >> 7) | 0x80); |
617 | buf[4] = (size & 0x7f); |
618 | m4af_write(ctx, buf, 5); |
619 | } |
620 | |
621 | static |
e4bbeeb0 |
622 | void m4af_write_ftyp_box(m4af_ctx_t *ctx) |
48e2f01c |
623 | { |
624 | m4af_write(ctx, "\0\0\0\040""ftypM4A \0\0\0\0M4A mp42isom\0\0\0\0", 32); |
625 | } |
626 | |
627 | static |
e4bbeeb0 |
628 | void m4af_write_free_box(m4af_ctx_t *ctx, uint32_t size) |
48e2f01c |
629 | { |
630 | int64_t pos = m4af_tell(ctx); |
631 | m4af_write32(ctx, size + 8); |
632 | m4af_write(ctx, "free", 4); |
633 | if (size > 0) |
634 | m4af_set_pos(ctx, pos + size + 8); |
635 | } |
636 | |
e4bbeeb0 |
637 | int m4af_begin_write(m4af_ctx_t *ctx) |
48e2f01c |
638 | { |
e4bbeeb0 |
639 | m4af_write_ftyp_box(ctx); |
640 | m4af_write_free_box(ctx, 0); |
48e2f01c |
641 | m4af_write(ctx, "\0\0\0\0mdat", 8); |
642 | ctx->mdat_pos = m4af_tell(ctx); |
e4bbeeb0 |
643 | return ctx->last_error; |
48e2f01c |
644 | } |
645 | |
646 | static |
e4bbeeb0 |
647 | void m4af_write_stco_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
648 | { |
649 | m4af_track_t *track = &ctx->track[track_idx]; |
650 | uint32_t i; |
651 | m4af_chunk_entry_t *index = track->chunk_table; |
652 | int is_co64 = (ctx->mdat_pos + ctx->mdat_size > UINT32_MAX); |
653 | int64_t pos = m4af_tell(ctx); |
654 | |
655 | m4af_write32(ctx, 0); /* size */ |
656 | m4af_write(ctx, is_co64 ? "co64" : "stco", 4); |
657 | m4af_write32(ctx, 0); /* version and flags */ |
658 | m4af_write32(ctx, track->num_chunks); |
659 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
660 | if (is_co64) |
661 | m4af_write64(ctx, index->offset); |
662 | else |
663 | m4af_write32(ctx, index->offset); |
664 | } |
e4bbeeb0 |
665 | m4af_update_box_size(ctx, pos); |
48e2f01c |
666 | } |
667 | |
668 | static |
e4bbeeb0 |
669 | void m4af_write_stsz_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
670 | { |
671 | m4af_track_t *track = &ctx->track[track_idx]; |
672 | m4af_sample_entry_t *index = track->sample_table; |
673 | uint32_t i; |
674 | int64_t pos = m4af_tell(ctx); |
675 | m4af_write(ctx, |
676 | "\0\0\0\0" /* size */ |
677 | "stsz" /* type */ |
678 | "\0" /* version */ |
679 | "\0\0\0" /* flags */ |
680 | "\0\0\0\0" /* sample_size: 0(variable) */ |
681 | , 16); |
682 | m4af_write32(ctx, track->num_samples); |
683 | for (i = 0; i < track->num_samples; ++i, ++index) |
684 | m4af_write32(ctx, index->size); |
e4bbeeb0 |
685 | m4af_update_box_size(ctx, pos); |
48e2f01c |
686 | } |
687 | |
688 | static |
e4bbeeb0 |
689 | void m4af_write_stsc_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
690 | { |
691 | m4af_track_t *track = &ctx->track[track_idx]; |
692 | m4af_chunk_entry_t *index = track->chunk_table; |
693 | uint32_t i, prev_samples_per_chunk = 0, entry_count = 0; |
694 | int64_t pos = m4af_tell(ctx); |
695 | m4af_write(ctx, |
696 | "\0\0\0\0" /* size */ |
697 | "stsc" /* type */ |
698 | "\0" /* version */ |
699 | "\0\0\0" /* flags */ |
700 | "\0\0\0\0" /* entry_count */ |
701 | , 16); |
702 | |
703 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
704 | if (index->samples_per_chunk != prev_samples_per_chunk) { |
705 | ++entry_count; |
706 | m4af_write32(ctx, i + 1); |
707 | m4af_write32(ctx, index->samples_per_chunk); |
708 | m4af_write32(ctx, 1); /* sample_description_index */ |
709 | prev_samples_per_chunk = index->samples_per_chunk; |
710 | } |
711 | } |
712 | m4af_write32_at(ctx, pos + 12, entry_count); |
e4bbeeb0 |
713 | m4af_update_box_size(ctx, pos); |
48e2f01c |
714 | } |
715 | |
716 | static |
e4bbeeb0 |
717 | void m4af_write_stts_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
718 | { |
719 | m4af_track_t *track = &ctx->track[track_idx]; |
720 | m4af_sample_entry_t *index = track->sample_table; |
721 | uint32_t i, prev_delta = 0, entry_count = 0, sample_count = 0; |
722 | int64_t pos = m4af_tell(ctx); |
723 | m4af_write(ctx, |
724 | "\0\0\0\0" /* size */ |
725 | "stts" /* type */ |
726 | "\0" /* version */ |
727 | "\0\0\0" /* flags */ |
728 | "\0\0\0\0" /* entry_count */ |
729 | , 16); |
730 | |
731 | for (i = 0; i < track->num_samples; ++i, ++index) { |
732 | if (index->delta == prev_delta) |
733 | ++sample_count; |
734 | else { |
735 | ++entry_count; |
736 | if (sample_count) { |
737 | m4af_write32(ctx, sample_count); |
738 | m4af_write32(ctx, prev_delta); |
739 | } |
740 | prev_delta = index->delta; |
741 | sample_count = 1; |
742 | } |
743 | } |
744 | if (sample_count) { |
745 | m4af_write32(ctx, sample_count); |
746 | m4af_write32(ctx, prev_delta); |
747 | } |
748 | m4af_write32_at(ctx, pos + 12, entry_count); |
e4bbeeb0 |
749 | m4af_update_box_size(ctx, pos); |
48e2f01c |
750 | } |
751 | |
752 | static |
e4bbeeb0 |
753 | void m4af_write_esds_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
754 | { |
755 | m4af_track_t *track = &ctx->track[track_idx]; |
756 | int64_t pos = m4af_tell(ctx); |
757 | m4af_write(ctx, "\0\0\0\0esds", 8); |
758 | m4af_write32(ctx, 0); /* version + flags */ |
759 | |
760 | /* ES_Descriptor */ |
e4bbeeb0 |
761 | m4af_write_descriptor(ctx, 3, 32 + track->decSpecificInfoSize); |
48e2f01c |
762 | m4af_write(ctx, "\0\0\0", 3); |
763 | /* DecoderConfigDescriptor */ |
e4bbeeb0 |
764 | m4af_write_descriptor(ctx, 4, 18 + track->decSpecificInfoSize); |
48e2f01c |
765 | m4af_write(ctx, |
766 | "\x40" /* objectTypeIndication: 0x40(Audio ISO/IEC 14496-3)*/ |
767 | "\x15" /* streamType(6): 0x05(AudioStream) |
768 | * upStream(1) : 0 |
769 | * reserved(1) : 1 |
770 | */ |
771 | , 2); |
772 | m4af_write24(ctx, track->bufferSizeDB); |
773 | m4af_write32(ctx, track->maxBitrate); |
fe2d3aa3 |
774 | #if 0 |
48e2f01c |
775 | m4af_write32(ctx, track->avgBitrate); |
fe2d3aa3 |
776 | #else |
777 | m4af_write32(ctx, 0); |
778 | #endif |
48e2f01c |
779 | /* DecoderSpecificInfo */ |
e4bbeeb0 |
780 | m4af_write_descriptor(ctx, 5, track->decSpecificInfoSize); |
48e2f01c |
781 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
782 | /* SLConfigDescriptor */ |
e4bbeeb0 |
783 | m4af_write_descriptor(ctx, 6, 1); |
48e2f01c |
784 | m4af_write(ctx, "\002", 1); /* predefined */ |
785 | |
e4bbeeb0 |
786 | m4af_update_box_size(ctx, pos); |
48e2f01c |
787 | } |
788 | |
789 | static |
e4bbeeb0 |
790 | void m4af_write_alac_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
791 | { |
792 | m4af_track_t *track = &ctx->track[track_idx]; |
793 | int64_t pos = m4af_tell(ctx); |
794 | m4af_write(ctx, |
795 | "\0\0\0\0" /* size */ |
796 | "alac" /* type */ |
797 | "\0" /* version */ |
798 | "\0\0\0" /* flags */ |
799 | , 12); |
800 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
e4bbeeb0 |
801 | m4af_update_box_size(ctx, pos); |
48e2f01c |
802 | } |
803 | |
804 | static |
e4bbeeb0 |
805 | void m4af_write_mp4a_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
806 | { |
807 | m4af_track_t *track = &ctx->track[track_idx]; |
808 | int64_t pos = m4af_tell(ctx); |
809 | m4af_write32(ctx, 0); /* size */ |
810 | m4af_write32(ctx, track->codec); /* mp4a or alac */ |
811 | m4af_write(ctx, |
812 | "\0\0\0\0\0\0" /* reserved */ |
813 | "\0\001" /* data_reference_index: 1 */ |
814 | "\0\0\0\0" /* reserved[0] */ |
815 | "\0\0\0\0" /* reserved[1] */ |
816 | "\0\002" /* channelcount: 2 */ |
817 | "\0\020" /* samplesize: 16 */ |
818 | "\0\0" /* pre_defined */ |
819 | "\0\0" /* reserved */ |
820 | ,24); |
821 | if (track->codec == M4AF_FOURCC('m','p','4','a')) { |
822 | m4af_write32(ctx, track->timescale << 16); |
e4bbeeb0 |
823 | m4af_write_esds_box(ctx, track_idx); |
48e2f01c |
824 | } else { |
e4bbeeb0 |
825 | m4af_write32(ctx, 44100 << 16); |
826 | m4af_write_alac_box(ctx, track_idx); |
48e2f01c |
827 | } |
e4bbeeb0 |
828 | m4af_update_box_size(ctx, pos); |
48e2f01c |
829 | } |
830 | |
831 | static |
e4bbeeb0 |
832 | void m4af_write_stsd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
833 | { |
834 | int64_t pos = m4af_tell(ctx); |
835 | m4af_write(ctx, "\0\0\0\0stsd", 8); |
836 | m4af_write(ctx, |
837 | "\0" /* version */ |
838 | "\0\0\0" /* flags */ |
839 | "\0\0\0\001" /* entry_count: 1 */ |
840 | , 8); |
e4bbeeb0 |
841 | m4af_write_mp4a_box(ctx, track_idx); |
842 | m4af_update_box_size(ctx, pos); |
48e2f01c |
843 | } |
844 | |
d317e29d |
845 | static |
846 | void m4af_write_sbgp_box(m4af_ctx_t *ctx, uint32_t track_idx) |
847 | { |
848 | m4af_track_t *track = &ctx->track[track_idx]; |
849 | m4af_write(ctx, |
850 | "\0\0\0\034" /* size: 28 */ |
851 | "sbgp" /* type */ |
852 | "\0" /* version */ |
853 | "\0\0\0" /* flags */ |
854 | "roll" /* grouping_type */ |
855 | "\0\0\0\001" /* entry_count: 1 */ |
856 | , 20); |
857 | m4af_write32(ctx, track->num_samples); |
858 | m4af_write32(ctx, 1); /* group_description_index */ |
859 | } |
860 | |
861 | static |
862 | void m4af_write_sgpd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
863 | { |
864 | m4af_track_t *track = &ctx->track[track_idx]; |
865 | m4af_write(ctx, |
866 | "\0\0\0\032" /* size */ |
867 | "sgpd" /* type */ |
868 | "\001" /* version */ |
869 | "\0\0\0" /* flags */ |
870 | "roll" /* grouping_type */ |
871 | "\0\0\0\002" /* default_length: 2 */ |
872 | "\0\0\0\001" /* entry_count: 1 */ |
873 | "\377\377" /* payload_data: -1 */ |
874 | , 26); |
875 | } |
876 | |
48e2f01c |
877 | static |
e4bbeeb0 |
878 | void m4af_write_stbl_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
879 | { |
d317e29d |
880 | m4af_track_t *track = &ctx->track[track_idx]; |
48e2f01c |
881 | int64_t pos = m4af_tell(ctx); |
882 | m4af_write(ctx, "\0\0\0\0stbl", 8); |
e4bbeeb0 |
883 | m4af_write_stsd_box(ctx, track_idx); |
d317e29d |
884 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_EDTS) && |
885 | (track->encoder_delay || track->padding)) { |
886 | m4af_write_sbgp_box(ctx, track_idx); |
887 | m4af_write_sgpd_box(ctx, track_idx); |
888 | } |
e4bbeeb0 |
889 | m4af_write_stts_box(ctx, track_idx); |
890 | m4af_write_stsc_box(ctx, track_idx); |
891 | m4af_write_stsz_box(ctx, track_idx); |
892 | m4af_write_stco_box(ctx, track_idx); |
893 | m4af_update_box_size(ctx, pos); |
48e2f01c |
894 | } |
895 | |
896 | static |
e4bbeeb0 |
897 | void m4af_write_url_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
898 | { |
899 | m4af_write(ctx, |
900 | "\0\0\0\014" /* size */ |
901 | "url " /* type */ |
902 | "\0" /* version */ |
903 | "\0\0\001" /* flags: 1(in the same file) */ |
904 | , 12); |
905 | } |
906 | |
907 | static |
e4bbeeb0 |
908 | void m4af_write_dref_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
909 | { |
910 | int64_t pos = m4af_tell(ctx); |
911 | m4af_write(ctx, "\0\0\0\0dref", 8); |
912 | m4af_write(ctx, |
913 | "\0" /* version */ |
914 | "\0\0\0" /* flags */ |
915 | "\0\0\0\001" /* entry_count: 1 */ |
916 | ,8); |
e4bbeeb0 |
917 | m4af_write_url_box(ctx, track_idx); |
918 | m4af_update_box_size(ctx, pos); |
48e2f01c |
919 | } |
920 | |
921 | static |
e4bbeeb0 |
922 | void m4af_write_dinf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
923 | { |
924 | int64_t pos = m4af_tell(ctx); |
925 | m4af_write(ctx, "\0\0\0\0dinf", 8); |
e4bbeeb0 |
926 | m4af_write_dref_box(ctx, track_idx); |
927 | m4af_update_box_size(ctx, pos); |
48e2f01c |
928 | } |
929 | |
930 | static |
e4bbeeb0 |
931 | void m4af_write_smhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
932 | { |
933 | m4af_write(ctx, |
934 | "\0\0\0\020" /* size */ |
935 | "smhd" /* type */ |
936 | "\0" /* version */ |
937 | "\0\0\0" /* flags */ |
938 | "\0\0" /* balance */ |
939 | "\0\0" /* reserved */ |
940 | , 16); |
941 | } |
942 | |
943 | static |
e4bbeeb0 |
944 | void m4af_write_minf_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
945 | { |
946 | m4af_track_t *track = &ctx->track[track_idx]; |
947 | int64_t pos = m4af_tell(ctx); |
948 | m4af_write(ctx, "\0\0\0\0minf", 8); |
949 | /* TODO: add TEXT support */ |
950 | if (track->codec != M4AF_CODEC_TEXT) |
e4bbeeb0 |
951 | m4af_write_smhd_box(ctx, track_idx); |
952 | m4af_write_dinf_box(ctx, track_idx); |
953 | m4af_write_stbl_box(ctx, track_idx); |
954 | m4af_update_box_size(ctx, pos); |
48e2f01c |
955 | } |
956 | |
957 | static |
e4bbeeb0 |
958 | void m4af_write_mdhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
959 | { |
960 | m4af_track_t *track = &ctx->track[track_idx]; |
961 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
962 | uint8_t version = (track->creation_time > UINT32_MAX || |
963 | track->modification_time > UINT32_MAX || |
964 | track->duration > UINT32_MAX); |
48e2f01c |
965 | |
966 | m4af_write(ctx, "\0\0\0\0mdhd", 8); |
967 | m4af_write(ctx, &version, 1); |
968 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
969 | if (version) { |
970 | m4af_write64(ctx, track->creation_time); |
971 | m4af_write64(ctx, track->modification_time); |
972 | m4af_write32(ctx, track->timescale); |
973 | m4af_write64(ctx, track->duration); |
974 | } else { |
975 | m4af_write32(ctx, track->creation_time); |
976 | m4af_write32(ctx, track->modification_time); |
977 | m4af_write32(ctx, track->timescale); |
978 | m4af_write32(ctx, track->duration); |
979 | } |
980 | m4af_write(ctx, |
981 | "\x55\xc4" /* language: und */ |
982 | "\0\0" /* pre_defined */ |
983 | , 4); |
e4bbeeb0 |
984 | m4af_update_box_size(ctx, pos); |
48e2f01c |
985 | } |
986 | |
987 | static |
e4bbeeb0 |
988 | void m4af_write_hdlr_box(m4af_ctx_t *ctx, uint32_t track_idx, const char *type) |
48e2f01c |
989 | { |
990 | int64_t pos = m4af_tell(ctx); |
991 | static const char reserved_and_name[10] = { 0 }; |
992 | |
993 | m4af_write(ctx, |
994 | "\0\0\0\0" /* size */ |
995 | "hdlr" /* type */ |
996 | "\0" /* version */ |
997 | "\0\0\0" /* flags */ |
998 | "\0\0\0\0" /* pre_defined */ |
999 | , 16); |
1000 | m4af_write(ctx, type, 4); /* handler_type */ |
1001 | /* reserved[0] */ |
1002 | m4af_write(ctx, !strcmp(type, "mdir") ? "appl" : "\0\0\0\0", 4); |
1003 | /* reserved[1], reserved[2], name */ |
1004 | m4af_write(ctx, reserved_and_name, (pos & 1) ? 9 : 10); |
e4bbeeb0 |
1005 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1006 | } |
1007 | |
1008 | static |
e4bbeeb0 |
1009 | void m4af_write_mdia_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
1010 | { |
1011 | m4af_track_t *track = &ctx->track[track_idx]; |
1012 | const char *hdlr = |
1013 | (track->codec == M4AF_CODEC_TEXT) ? "text" : "soun"; |
1014 | int64_t pos = m4af_tell(ctx); |
1015 | m4af_write(ctx, "\0\0\0\0mdia", 8); |
e4bbeeb0 |
1016 | m4af_write_mdhd_box(ctx, track_idx); |
1017 | m4af_write_hdlr_box(ctx, track_idx, hdlr); |
1018 | m4af_write_minf_box(ctx, track_idx); |
1019 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1020 | } |
1021 | |
d317e29d |
1022 | static |
1023 | void m4af_write_elst_box(m4af_ctx_t *ctx, uint32_t track_idx) |
1024 | { |
1025 | m4af_track_t *track = &ctx->track[track_idx]; |
1026 | uint8_t version; |
1027 | int64_t duration = track->duration - track->encoder_delay - track->padding; |
1028 | int64_t pos = m4af_tell(ctx); |
1029 | duration = (double)duration / track->timescale * ctx->timescale + .5; |
1030 | version = (duration > UINT32_MAX); |
1031 | |
1032 | m4af_write(ctx, "\0\0\0\0elst", 8); |
1033 | m4af_write(ctx, &version, 1); |
1034 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
1035 | m4af_write32(ctx, 1); /* entry_count: 1 */ |
1036 | if (version) { |
1037 | m4af_write64(ctx, duration); |
1038 | m4af_write64(ctx, track->encoder_delay); |
1039 | } else { |
1040 | m4af_write32(ctx, duration); |
1041 | m4af_write32(ctx, track->encoder_delay); |
1042 | } |
1043 | m4af_write16(ctx, 1); /* media_rate_integer */ |
1044 | m4af_write16(ctx, 0); /* media_rate_fraction */ |
1045 | m4af_update_box_size(ctx, pos); |
1046 | } |
1047 | |
1048 | static |
1049 | void m4af_write_edts_box(m4af_ctx_t *ctx, uint32_t track_idx) |
1050 | { |
1051 | m4af_track_t *track = &ctx->track[track_idx]; |
1052 | int64_t pos = m4af_tell(ctx); |
1053 | m4af_write(ctx, "\0\0\0\0edts", 8); |
1054 | m4af_write_elst_box(ctx, track_idx); |
1055 | m4af_update_box_size(ctx, pos); |
1056 | } |
1057 | |
48e2f01c |
1058 | static |
e4bbeeb0 |
1059 | void m4af_write_tkhd_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
1060 | { |
1061 | m4af_track_t *track = &ctx->track[track_idx]; |
1062 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
1063 | int64_t duration = |
1064 | (double)track->duration / track->timescale * ctx->timescale + .5; |
1065 | uint8_t version = (track->creation_time > UINT32_MAX || |
1066 | track->modification_time > UINT32_MAX || |
1067 | duration > UINT32_MAX); |
48e2f01c |
1068 | m4af_write(ctx, "\0\0\0\0tkhd", 8); |
1069 | m4af_write(ctx, &version, 1); |
1070 | m4af_write(ctx, "\0\0\007", 3); /* flags */ |
1071 | if (version) { |
1072 | m4af_write64(ctx, track->creation_time); |
1073 | m4af_write64(ctx, track->modification_time); |
1074 | m4af_write32(ctx, track_idx + 1); |
1075 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
1076 | , 4); |
f67cfe22 |
1077 | m4af_write64(ctx, duration); |
48e2f01c |
1078 | } else { |
1079 | m4af_write32(ctx, track->creation_time); |
1080 | m4af_write32(ctx, track->modification_time); |
1081 | m4af_write32(ctx, track_idx + 1); |
1082 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
1083 | , 4); |
f67cfe22 |
1084 | m4af_write32(ctx, duration); |
48e2f01c |
1085 | } |
1086 | m4af_write(ctx, |
1087 | "\0\0\0\0" /* reserved[0] */ |
1088 | "\0\0\0\0" /* reserved[1] */ |
1089 | "\0\0" /* layer */ |
1090 | "\0\0" /* alternate_group */ |
1091 | "\001\0" /* volume: 1.0 */ |
1092 | "\0\0" /* reserved */ |
1093 | "\0\001\0\0" /* matrix[0] */ |
1094 | "\0\0\0\0" /* matrix[1] */ |
1095 | "\0\0\0\0" /* matrix[2] */ |
1096 | "\0\0\0\0" /* matrix[3] */ |
1097 | "\0\001\0\0" /* matrix[4] */ |
1098 | "\0\0\0\0" /* matrix[5] */ |
1099 | "\0\0\0\0" /* matrix[6] */ |
1100 | "\0\0\0\0" /* matrix[7] */ |
1101 | "\100\0\0\0" /* matrix[8] */ |
1102 | "\0\0\0\0" /* width */ |
1103 | "\0\0\0\0" /* height */ |
1104 | , 60); |
e4bbeeb0 |
1105 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1106 | } |
1107 | |
1108 | static |
e4bbeeb0 |
1109 | void m4af_write_trak_box(m4af_ctx_t *ctx, uint32_t track_idx) |
48e2f01c |
1110 | { |
d317e29d |
1111 | m4af_track_t *track = &ctx->track[track_idx]; |
48e2f01c |
1112 | int64_t pos = m4af_tell(ctx); |
1113 | m4af_write(ctx, "\0\0\0\0trak", 8); |
e4bbeeb0 |
1114 | m4af_write_tkhd_box(ctx, track_idx); |
d317e29d |
1115 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_EDTS) && |
1116 | (track->encoder_delay || track->padding)) |
1117 | m4af_write_edts_box(ctx, track_idx); |
e4bbeeb0 |
1118 | m4af_write_mdia_box(ctx, track_idx); |
1119 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1120 | } |
1121 | |
1122 | static |
e4bbeeb0 |
1123 | int64_t m4af_movie_duration(m4af_ctx_t *ctx) |
48e2f01c |
1124 | { |
1125 | int64_t movie_duration = 0; |
1126 | unsigned i; |
1127 | for (i = 0; i < ctx->num_tracks; ++i) { |
1128 | double x = ctx->track[i].duration; |
f67cfe22 |
1129 | int64_t duration = x / ctx->track[i].timescale * ctx->timescale + .5; |
48e2f01c |
1130 | if (duration > movie_duration) |
1131 | movie_duration = duration; |
1132 | } |
1133 | return movie_duration; |
1134 | } |
1135 | |
1136 | static |
e4bbeeb0 |
1137 | void m4af_write_mvhd_box(m4af_ctx_t *ctx) |
48e2f01c |
1138 | { |
1139 | int64_t pos = m4af_tell(ctx); |
48e2f01c |
1140 | int64_t movie_duration = m4af_movie_duration(ctx); |
f67cfe22 |
1141 | uint8_t version = (ctx->creation_time > UINT32_MAX || |
1142 | ctx->modification_time > UINT32_MAX || |
1143 | movie_duration > UINT32_MAX); |
48e2f01c |
1144 | |
1145 | m4af_write(ctx, "\0\0\0\0mvhd", 8); |
1146 | m4af_write(ctx, &version, 1); |
1147 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
1148 | if (version) { |
1149 | m4af_write64(ctx, ctx->creation_time); |
1150 | m4af_write64(ctx, ctx->modification_time); |
1151 | m4af_write32(ctx, ctx->timescale); |
1152 | m4af_write64(ctx, movie_duration); |
1153 | } else { |
1154 | m4af_write32(ctx, ctx->creation_time); |
1155 | m4af_write32(ctx, ctx->modification_time); |
1156 | m4af_write32(ctx, ctx->timescale); |
1157 | m4af_write32(ctx, movie_duration); |
1158 | } |
1159 | m4af_write(ctx, |
1160 | "\0\001\0\0" /* rate: 1.0 */ |
1161 | "\001\0" /* volume: 1.0 */ |
1162 | "\0\0" /* reserved */ |
1163 | "\0\0\0\0" /* reserved[0] */ |
1164 | "\0\0\0\0" /* reserved[1] */ |
1165 | "\0\001\0\0" /* matrix[0] */ |
1166 | "\0\0\0\0" /* matrix[1] */ |
1167 | "\0\0\0\0" /* matrix[2] */ |
1168 | "\0\0\0\0" /* matrix[3] */ |
1169 | "\0\001\0\0" /* matrix[4] */ |
1170 | "\0\0\0\0" /* matrix[5] */ |
1171 | "\0\0\0\0" /* matrix[6] */ |
1172 | "\0\0\0\0" /* matrix[7] */ |
1173 | "\100\0\0\0" /* matrix[8] */ |
1174 | "\0\0\0\0" /* pre_defined[0] */ |
1175 | "\0\0\0\0" /* pre_defined[1] */ |
1176 | "\0\0\0\0" /* pre_defined[2] */ |
1177 | "\0\0\0\0" /* pre_defined[3] */ |
1178 | "\0\0\0\0" /* pre_defined[4] */ |
1179 | "\0\0\0\0" /* pre_defined[5] */ |
1180 | , 76); |
1181 | m4af_write32(ctx, ctx->num_tracks + 1); |
e4bbeeb0 |
1182 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1183 | } |
1184 | |
1185 | static |
e4bbeeb0 |
1186 | void m4af_write_mean_box(m4af_ctx_t *ctx) |
48e2f01c |
1187 | { |
1188 | m4af_write(ctx, |
1189 | "\0\0\0\034" /* size */ |
1190 | "mean" |
1191 | "\0" /* version */ |
1192 | "\0\0\0" /* flags */ |
1193 | "com.apple.iTunes" /* meaning-string */ |
1194 | , 28); |
1195 | } |
1196 | |
1197 | static |
e4bbeeb0 |
1198 | void m4af_write_name_box(m4af_ctx_t *ctx, const char *name) |
48e2f01c |
1199 | { |
1200 | int64_t pos = m4af_tell(ctx); |
1201 | m4af_write(ctx, |
1202 | "\0\0\0\0" /* size */ |
1203 | "name" /* type */ |
1204 | "\0" /* version */ |
1205 | "\0\0\0" /* flags */ |
1206 | , 12); |
1207 | m4af_write(ctx, name, strlen(name)); |
e4bbeeb0 |
1208 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1209 | } |
1210 | |
1211 | static |
e4bbeeb0 |
1212 | void m4af_write_data_box(m4af_ctx_t *ctx, uint32_t type_code, |
1213 | const char *data, uint32_t data_size) |
48e2f01c |
1214 | { |
1215 | int64_t pos = m4af_tell(ctx); |
1216 | uint8_t code = type_code; |
1217 | m4af_write(ctx, |
1218 | "\0\0\0\0" /* size */ |
1219 | "data" /* type */ |
1220 | "\0\0" /* reserved */ |
1221 | "\0" /* type_set_indifier */ |
1222 | ,11); |
1223 | m4af_write(ctx, &code, 1); |
1224 | m4af_write(ctx, "\0\0\0\0", 4); /* locale */ |
1225 | m4af_write(ctx, data, data_size); |
e4bbeeb0 |
1226 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1227 | } |
1228 | |
1229 | static |
e4bbeeb0 |
1230 | void m4af_write_metadata(m4af_ctx_t *ctx, m4af_itmf_entry_t *entry) |
48e2f01c |
1231 | { |
1232 | int64_t pos = m4af_tell(ctx); |
1233 | m4af_write(ctx, "\0\0\0\0", 4); |
e4bbeeb0 |
1234 | m4af_write32(ctx, entry->fcc); |
1235 | if (entry->fcc != M4AF_FOURCC('-','-','-','-')) |
1236 | m4af_write_data_box(ctx, entry->type_code, |
1237 | entry->data, entry->data_size); |
48e2f01c |
1238 | else { |
e4bbeeb0 |
1239 | m4af_write_mean_box(ctx); |
1240 | m4af_write_name_box(ctx, entry->name); |
1241 | m4af_write_data_box(ctx, 1, entry->data, entry->data_size); |
48e2f01c |
1242 | } |
e4bbeeb0 |
1243 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1244 | } |
1245 | |
1246 | static |
e4bbeeb0 |
1247 | void m4af_write_ilst_box(m4af_ctx_t *ctx) |
48e2f01c |
1248 | { |
1249 | uint32_t i; |
1250 | int64_t pos = m4af_tell(ctx); |
1251 | m4af_write(ctx, "\0\0\0\0ilst", 8); |
1252 | for (i = 0; i < ctx->num_tags; ++i) |
1253 | m4af_write_metadata(ctx, &ctx->itmf_table[i]); |
e4bbeeb0 |
1254 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1255 | } |
1256 | |
1257 | static |
e4bbeeb0 |
1258 | void m4af_write_meta_box(m4af_ctx_t *ctx) |
48e2f01c |
1259 | { |
1260 | int64_t pos = m4af_tell(ctx); |
1261 | m4af_write(ctx, |
1262 | "\0\0\0\0" /* size */ |
1263 | "meta" /* type */ |
1264 | "\0" /* version */ |
1265 | "\0\0\0" /* flags */ |
1266 | , 12); |
e4bbeeb0 |
1267 | m4af_write_hdlr_box(ctx, 0, "mdir"); |
1268 | m4af_write_ilst_box(ctx); |
1269 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1270 | } |
1271 | |
1272 | static |
e4bbeeb0 |
1273 | void m4af_write_udta_box(m4af_ctx_t *ctx) |
48e2f01c |
1274 | { |
1275 | int64_t pos = m4af_tell(ctx); |
1276 | m4af_write(ctx, "\0\0\0\0udta", 8); |
e4bbeeb0 |
1277 | m4af_write_meta_box(ctx); |
1278 | m4af_update_box_size(ctx, pos); |
48e2f01c |
1279 | } |
1280 | |
1281 | static |
fb2b3635 |
1282 | uint32_t m4af_write_moov_box(m4af_ctx_t *ctx) |
48e2f01c |
1283 | { |
1284 | unsigned i; |
1285 | int64_t pos = m4af_tell(ctx); |
1286 | m4af_write(ctx, "\0\0\0\0moov", 8); |
e4bbeeb0 |
1287 | m4af_write_mvhd_box(ctx); |
48e2f01c |
1288 | for (i = 0; i < ctx->num_tracks; ++i) |
e4bbeeb0 |
1289 | m4af_write_trak_box(ctx, i); |
48e2f01c |
1290 | if (ctx->num_tags) |
e4bbeeb0 |
1291 | m4af_write_udta_box(ctx); |
fb2b3635 |
1292 | return m4af_update_box_size(ctx, pos); |
48e2f01c |
1293 | } |
1294 | |
1295 | static |
e4bbeeb0 |
1296 | void m4af_finalize_mdat(m4af_ctx_t *ctx) |
48e2f01c |
1297 | { |
1298 | if (ctx->mdat_size + 8 > UINT32_MAX) { |
1299 | m4af_set_pos(ctx, ctx->mdat_pos - 16); |
1300 | m4af_write32(ctx, 1); |
1301 | m4af_write(ctx, "mdat", 4); |
1302 | m4af_write64(ctx, ctx->mdat_size + 16); |
1303 | } else { |
1304 | m4af_set_pos(ctx, ctx->mdat_pos - 8); |
1305 | m4af_write32(ctx, ctx->mdat_size + 8); |
1306 | } |
1307 | m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size); |
1308 | } |
1309 | |
fb2b3635 |
1310 | static |
1311 | void m4af_shift_mdat_pos(m4af_ctx_t *ctx, uint32_t offset) |
1312 | { |
1313 | unsigned i, j; |
1314 | int64_t begin, end; |
1315 | char buf[8192]; |
1316 | |
1317 | end = ctx->mdat_pos + ctx->mdat_size; |
1318 | for (; (begin = m4af_max(ctx->mdat_pos, end - 8192)) < end; end = begin) { |
1319 | m4af_set_pos(ctx, begin); |
1320 | ctx->io.read(ctx->io_cookie, buf, end - begin); |
1321 | m4af_set_pos(ctx, begin + offset); |
1322 | m4af_write(ctx, buf, end - begin); |
1323 | } |
1324 | for (i = 0; i < ctx->num_tracks; ++i) |
1325 | for (j = 0; j < ctx->track[i].num_chunks; ++j) |
1326 | ctx->track[i].chunk_table[j].offset += offset; |
1327 | ctx->mdat_pos += offset; |
1328 | m4af_set_pos(ctx, ctx->mdat_pos - 16); |
1329 | m4af_write_free_box(ctx, 0); |
1330 | m4af_write(ctx, "\0\0\0\0mdat", 8); |
1331 | m4af_finalize_mdat(ctx); |
1332 | } |
1333 | |
1334 | int m4af_finalize(m4af_ctx_t *ctx, int optimize) |
48e2f01c |
1335 | { |
1336 | unsigned i; |
1337 | m4af_track_t *track; |
fb2b3635 |
1338 | uint32_t moov_size; |
48e2f01c |
1339 | |
1340 | for (i = 0; i < ctx->num_tracks; ++i) { |
1341 | track = ctx->track + i; |
1342 | if (track->duration) { |
1343 | int64_t track_size = 0; |
7b1f2136 |
1344 | unsigned j; |
48e2f01c |
1345 | for (j = 0; j < track->num_chunks; ++j) |
1346 | track_size += track->chunk_table[j].size; |
1347 | track->avgBitrate = |
1348 | 8.0 * track_size * track->timescale / track->duration + .5; |
1349 | } |
1350 | m4af_flush_chunk(ctx, i); |
1351 | } |
d317e29d |
1352 | track = ctx->track; |
1353 | if ((ctx->priming_mode & M4AF_PRIMING_MODE_ITUNSMPB) && |
1354 | (track->encoder_delay || track->padding)) |
48e2f01c |
1355 | m4af_set_iTunSMPB(ctx); |
1356 | m4af_finalize_mdat(ctx); |
fb2b3635 |
1357 | moov_size = m4af_write_moov_box(ctx); |
1358 | if (optimize) { |
1359 | int64_t pos; |
1360 | m4af_shift_mdat_pos(ctx, moov_size + 1024); |
1361 | m4af_set_pos(ctx, 32); |
1362 | m4af_write_moov_box(ctx); |
1363 | pos = m4af_tell(ctx); |
1364 | m4af_write_free_box(ctx, ctx->mdat_pos - pos - 24); |
1365 | } |
e4bbeeb0 |
1366 | return ctx->last_error; |
48e2f01c |
1367 | } |