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> |
11 | #include <time.h> |
12 | #if HAVE_STDINT_H |
13 | # include <stdint.h> |
14 | #endif |
15 | #include "m4af.h" |
16 | #include "m4af_endian.h" |
17 | |
18 | #define m4af_realloc(memory,size) realloc(memory, size) |
19 | #define m4af_free(memory) free(memory) |
20 | |
21 | typedef struct m4af_sample_entry_t { |
22 | uint32_t size; |
23 | uint32_t delta; |
24 | } m4af_sample_entry_t; |
25 | |
26 | typedef struct m4af_chunk_entry_t { |
27 | int64_t offset; |
28 | uint32_t size; |
29 | uint32_t samples_per_chunk; |
30 | uint32_t duration; |
31 | } m4af_chunk_entry_t; |
32 | |
33 | typedef struct m4af_itmf_entry_t { |
34 | uint32_t type; /* fcc */ |
35 | union { |
36 | uint32_t type_code; |
37 | char *name; |
38 | } u; |
39 | char *data; |
40 | uint32_t data_size; |
41 | } m4af_itmf_entry_t; |
42 | |
43 | typedef struct m4af_track_t { |
44 | uint32_t codec; |
45 | uint32_t timescale; |
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; |
57 | |
58 | m4af_sample_entry_t *sample_table; |
59 | uint32_t num_samples; |
60 | uint32_t sample_table_capacity; |
61 | |
62 | m4af_chunk_entry_t *chunk_table; |
63 | uint32_t num_chunks; |
64 | uint32_t chunk_table_capacity; |
65 | |
66 | uint8_t *chunk_buffer; |
67 | uint32_t chunk_size; |
68 | uint32_t chunk_capacity; |
69 | } m4af_track_t; |
70 | |
71 | struct m4af_writer_t { |
72 | uint32_t timescale; |
73 | int64_t creation_time; |
74 | int64_t modification_time; |
75 | int64_t mdat_pos; |
76 | int64_t mdat_size; |
77 | int last_error; |
78 | |
79 | m4af_itmf_entry_t *itmf_table; |
80 | uint32_t num_tags; |
81 | uint32_t itmf_table_capacity; |
82 | |
83 | m4af_io_callbacks_t io; |
84 | void *io_cookie; |
85 | |
86 | uint16_t num_tracks; |
87 | m4af_track_t track[1]; |
88 | }; |
89 | |
90 | static |
91 | int64_t m4af_timestamp(void) |
92 | { |
93 | return (int64_t)(time(0)) + (((1970 - 1904) * 365) + 17) * 24 * 60 * 60; |
94 | } |
95 | |
96 | /* |
97 | * http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 |
98 | */ |
99 | static |
100 | uint32_t m4af_roundup(uint32_t n) |
101 | { |
102 | n--; |
103 | n |= n >> 1; |
104 | n |= n >> 2; |
105 | n |= n >> 4; |
106 | n |= n >> 8; |
107 | n |= n >> 16; |
108 | n++; |
109 | return n; |
110 | } |
111 | |
112 | static |
113 | int64_t m4af_tell(m4af_writer_t *ctx) |
114 | { |
115 | int64_t pos = -1; |
116 | if (!ctx->last_error && (pos = ctx->io.tell(ctx->io_cookie)) < 0) |
117 | ctx->last_error = M4AF_IO_ERROR; |
118 | return pos; |
119 | } |
120 | |
121 | static |
122 | int m4af_set_pos(m4af_writer_t *ctx, int64_t pos) |
123 | { |
124 | int rc = -1; |
125 | if (!ctx->last_error && |
126 | (rc = ctx->io.seek(ctx->io_cookie, pos, SEEK_SET)) < 0) |
127 | ctx->last_error = M4AF_IO_ERROR; |
128 | return rc; |
129 | } |
130 | |
131 | static |
132 | int m4af_write(m4af_writer_t *ctx, const void *data, uint32_t size) |
133 | { |
134 | int rc = -1; |
135 | if (!ctx->last_error && |
136 | (rc = ctx->io.write(ctx->io_cookie, data, size)) < 0) |
137 | ctx->last_error = M4AF_IO_ERROR; |
138 | return rc; |
139 | } |
140 | |
141 | static |
142 | int m4af_write32(m4af_writer_t *ctx, uint32_t data) |
143 | { |
144 | data = m4af_htob32(data); |
145 | return m4af_write(ctx, &data, 4); |
146 | } |
147 | |
148 | static |
149 | int m4af_write64(m4af_writer_t *ctx, uint64_t data) |
150 | { |
151 | data = m4af_htob64(data); |
152 | return m4af_write(ctx, &data, 8); |
153 | } |
154 | |
155 | static |
156 | int m4af_write24(m4af_writer_t *ctx, uint32_t data) |
157 | { |
158 | data = m4af_htob32(data << 8); |
159 | return m4af_write(ctx, &data, 3); |
160 | } |
161 | |
162 | static |
163 | void m4af_write32_at(m4af_writer_t *ctx, int64_t pos, uint32_t value) |
164 | { |
165 | int64_t current_pos = m4af_tell(ctx); |
166 | m4af_set_pos(ctx, pos); |
167 | m4af_write32(ctx, value); |
168 | m4af_set_pos(ctx, current_pos); |
169 | } |
170 | |
171 | m4af_writer_t *m4af_create(uint32_t codec, uint32_t timescale, |
172 | m4af_io_callbacks_t *io, void *io_cookie) |
173 | { |
174 | m4af_writer_t *ctx; |
175 | int64_t timestamp; |
176 | |
177 | if (codec != M4AF_FOURCC('m','p','4','a') && |
178 | codec != M4AF_FOURCC('a','l','a','c')) |
179 | return 0; |
180 | if ((ctx = m4af_realloc(0, sizeof(m4af_writer_t))) == 0) |
181 | return 0; |
182 | memset(ctx, 0, sizeof(m4af_writer_t)); |
183 | memcpy(&ctx->io, io, sizeof(m4af_io_callbacks_t)); |
184 | ctx->io_cookie = io_cookie; |
185 | ctx->timescale = timescale; |
186 | timestamp = m4af_timestamp(); |
187 | ctx->creation_time = timestamp; |
188 | ctx->modification_time = timestamp; |
189 | ctx->num_tracks = 1; |
190 | ctx->track[0].codec = codec; |
191 | ctx->track[0].timescale = timescale; |
192 | ctx->track[0].creation_time = timestamp; |
193 | ctx->track[0].modification_time = timestamp; |
194 | return ctx; |
195 | } |
196 | |
197 | void m4af_set_fixed_frame_duration(m4af_writer_t *ctx, int track_idx, |
198 | uint32_t length) |
199 | { |
200 | ctx->track[track_idx].frame_duration = length; |
201 | } |
202 | |
203 | int m4af_decoder_specific_info(m4af_writer_t *ctx, int track_idx, |
204 | uint8_t *data, uint32_t size) |
205 | { |
206 | m4af_track_t *track = &ctx->track[track_idx]; |
207 | if (size > track->decSpecificInfoSize) { |
208 | uint8_t *memory = m4af_realloc(track->decSpecificInfo, size); |
209 | if (memory == 0) { |
210 | ctx->last_error = M4AF_NO_MEMORY; |
211 | return -1; |
212 | } |
213 | track->decSpecificInfo = memory; |
214 | } |
215 | if (size > 0) |
216 | memcpy(track->decSpecificInfo, data, size); |
217 | track->decSpecificInfoSize = size; |
218 | return 0; |
219 | } |
220 | |
221 | void m4af_set_priming(m4af_writer_t *ctx, int track_idx, |
222 | uint32_t encoder_delay, uint32_t padding) |
223 | { |
224 | m4af_track_t *track = &ctx->track[track_idx]; |
225 | track->encoder_delay = encoder_delay; |
226 | track->padding = padding; |
227 | } |
228 | |
229 | static |
230 | int m4af_add_sample_entry(m4af_writer_t *ctx, int track_idx, |
231 | uint32_t size, uint32_t delta) |
232 | { |
233 | m4af_track_t *track = &ctx->track[track_idx]; |
234 | m4af_sample_entry_t *entry; |
235 | |
236 | if (ctx->last_error) |
237 | return -1; |
238 | if (track->num_samples == track->sample_table_capacity) { |
239 | uint32_t new_size = track->sample_table_capacity; |
240 | new_size = new_size ? new_size * 2 : 1; |
241 | entry = m4af_realloc(track->sample_table, new_size * sizeof(*entry)); |
242 | if (entry == 0) { |
243 | ctx->last_error = M4AF_NO_MEMORY; |
244 | return -1; |
245 | } |
246 | track->sample_table = entry; |
247 | track->sample_table_capacity = new_size; |
248 | } |
249 | entry = track->sample_table + track->num_samples; |
250 | entry->size = size; |
251 | entry->delta = delta; |
252 | ++track->num_samples; |
253 | return 0; |
254 | } |
255 | |
256 | static |
257 | int m4af_flush_chunk(m4af_writer_t *ctx, int track_idx) |
258 | { |
259 | m4af_track_t *track = &ctx->track[track_idx]; |
260 | m4af_chunk_entry_t *entry; |
261 | if (!track->num_chunks || !track->chunk_size) |
262 | return 0; |
263 | entry = &track->chunk_table[track->num_chunks - 1]; |
264 | entry->offset = m4af_tell(ctx); |
265 | m4af_write(ctx, track->chunk_buffer, track->chunk_size); |
266 | ctx->mdat_size += track->chunk_size; |
267 | track->chunk_size = 0; |
268 | return ctx->last_error ? -1 : 0; |
269 | } |
270 | |
271 | static |
272 | int m4af_update_chunk_table(m4af_writer_t *ctx, int track_idx, |
273 | uint32_t size, uint32_t delta) |
274 | { |
275 | m4af_track_t *track = &ctx->track[track_idx]; |
276 | m4af_chunk_entry_t *entry; |
277 | int add_new_chunk = 0; |
278 | |
279 | if (ctx->last_error) |
280 | return -1; |
281 | if (track->num_chunks == 0) |
282 | add_new_chunk = 1; |
283 | else { |
284 | entry = &track->chunk_table[track->num_chunks - 1]; |
285 | if (entry->duration + delta > track->timescale / 2) |
286 | add_new_chunk = 1; |
287 | } |
288 | if (add_new_chunk) { |
289 | m4af_flush_chunk(ctx, track_idx); |
290 | if (track->num_chunks == track->chunk_table_capacity) { |
291 | uint32_t new_size = track->chunk_table_capacity; |
292 | new_size = new_size ? new_size * 2 : 1; |
293 | entry = m4af_realloc(track->chunk_table, new_size * sizeof(*entry)); |
294 | if (entry == 0) { |
295 | ctx->last_error = M4AF_NO_MEMORY; |
296 | return -1; |
297 | } |
298 | track->chunk_table = entry; |
299 | track->chunk_table_capacity = new_size; |
300 | } |
301 | memset(&track->chunk_table[track->num_chunks++], 0, |
302 | sizeof(m4af_chunk_entry_t)); |
303 | } |
304 | entry = &track->chunk_table[track->num_chunks - 1]; |
305 | entry->size += size; |
306 | ++entry->samples_per_chunk; |
307 | entry->duration += delta; |
308 | return 0; |
309 | } |
310 | |
311 | static |
312 | void m4af_update_max_bitrate(m4af_writer_t *ctx, int track_idx) |
313 | { |
314 | m4af_track_t *track = &ctx->track[track_idx]; |
315 | uint32_t duration = 0, size = 0, bitrate; |
316 | m4af_sample_entry_t *ent = track->sample_table + track->num_samples - 1; |
317 | |
318 | for (; ent >= track->sample_table && duration < track->timescale; --ent) { |
319 | duration += ent->delta; |
320 | size += ent->size; |
321 | } |
322 | bitrate = (uint32_t)(size * 8.0 * track->timescale / duration + .5); |
323 | if (bitrate > track->maxBitrate) |
324 | track->maxBitrate = bitrate; |
325 | } |
326 | |
327 | static |
328 | int m4af_append_sample_to_chunk(m4af_writer_t *ctx, int track_idx, |
329 | const void *data, uint32_t size) |
330 | { |
331 | m4af_track_t *track = &ctx->track[track_idx]; |
332 | uint32_t newsize = track->chunk_size + size; |
333 | |
334 | if (ctx->last_error) |
335 | return -1; |
336 | if (track->chunk_capacity < newsize) { |
337 | uint32_t capacity = m4af_roundup(newsize); |
338 | uint8_t *memory = realloc(track->chunk_buffer, capacity); |
339 | if (!memory) { |
340 | ctx->last_error = M4AF_NO_MEMORY; |
341 | return -1; |
342 | } |
343 | track->chunk_buffer = memory; |
344 | track->chunk_capacity = capacity; |
345 | } |
346 | memcpy(track->chunk_buffer + track->chunk_size, data, size); |
347 | track->chunk_size = newsize; |
348 | return 0; |
349 | } |
350 | |
351 | int m4af_write_sample(m4af_writer_t *ctx, int track_idx, const void *data, |
352 | uint32_t size, uint32_t duration) |
353 | { |
354 | m4af_track_t *track = &ctx->track[track_idx]; |
355 | if (track->frame_duration) |
356 | duration = track->frame_duration; |
357 | if (size > track->bufferSizeDB) |
358 | track->bufferSizeDB = size; |
359 | track->duration += duration; |
360 | m4af_add_sample_entry(ctx, track_idx, size, duration); |
361 | m4af_update_chunk_table(ctx, track_idx, size, duration); |
362 | m4af_update_max_bitrate(ctx, track_idx); |
363 | m4af_append_sample_to_chunk(ctx, track_idx, data, size); |
364 | return ctx->last_error ? -1 : 0; |
365 | } |
366 | |
367 | static |
368 | int m4af_add_itmf_entry(m4af_writer_t *ctx) |
369 | { |
370 | m4af_itmf_entry_t *entry; |
371 | if (ctx->num_tags == ctx->itmf_table_capacity) { |
372 | uint32_t new_size = ctx->itmf_table_capacity; |
373 | new_size = new_size ? new_size * 2 : 1; |
374 | entry = m4af_realloc(ctx->itmf_table, new_size * sizeof(*entry)); |
375 | if (entry == 0) { |
376 | ctx->last_error = M4AF_NO_MEMORY; |
377 | return -1; |
378 | } |
379 | ctx->itmf_table = entry; |
380 | ctx->itmf_table_capacity = new_size; |
381 | } |
382 | ++ctx->num_tags; |
383 | return 0; |
384 | } |
385 | |
386 | int m4af_add_itmf_long_tag(m4af_writer_t *ctx, const char *name, |
387 | const char *data) |
388 | { |
389 | m4af_itmf_entry_t *entry; |
390 | size_t name_len = strlen(name); |
391 | size_t data_len = strlen(data); |
392 | char *name_copy = m4af_realloc(0, name_len + 1); |
393 | char *data_copy = m4af_realloc(0, data_len); |
394 | if (!name_copy || !data_copy) { |
395 | ctx->last_error = M4AF_NO_MEMORY; |
396 | goto FAIL; |
397 | } |
398 | if (m4af_add_itmf_entry(ctx) < 0) |
399 | goto FAIL; |
400 | memcpy(name_copy, name, name_len + 1); |
401 | memcpy(data_copy, data, data_len); |
402 | entry = ctx->itmf_table + ctx->num_tags - 1; |
403 | entry->type = M4AF_FOURCC('-','-','-','-'); |
404 | entry->u.name = name_copy; |
405 | entry->data = data_copy; |
406 | entry->data_size = data_len; |
407 | return 0; |
408 | FAIL: |
409 | if (name_copy) |
410 | m4af_free(name_copy); |
411 | if (data_copy) |
412 | m4af_free(data_copy); |
413 | return -1; |
414 | } |
415 | |
416 | int m4af_add_itmf_short_tag(m4af_writer_t *ctx, uint32_t type, |
417 | uint32_t type_code, const void *data, |
418 | uint32_t data_size) |
419 | { |
420 | m4af_itmf_entry_t *entry; |
421 | char *data_copy = m4af_realloc(0, data_size); |
422 | if (!data_copy) { |
423 | ctx->last_error = M4AF_NO_MEMORY; |
424 | goto FAIL; |
425 | } |
426 | if (m4af_add_itmf_entry(ctx) < 0) |
427 | goto FAIL; |
428 | entry = ctx->itmf_table + ctx->num_tags - 1; |
429 | entry->type = type; |
430 | entry->u.type_code = type_code; |
431 | memcpy(data_copy, data, data_size); |
432 | entry->data = data_copy; |
433 | entry->data_size = data_size; |
434 | return 0; |
435 | FAIL: |
436 | if (data_copy) |
437 | m4af_free(data_copy); |
438 | return -1; |
439 | } |
440 | |
441 | int m4af_add_itmf_string_tag(m4af_writer_t *ctx, uint32_t type, |
442 | const char *data) |
443 | { |
444 | return m4af_add_itmf_short_tag(ctx, type, M4AF_UTF8, data, strlen(data)); |
445 | } |
446 | |
447 | int m4af_add_itmf_int8_tag(m4af_writer_t *ctx, uint32_t type, int value) |
448 | { |
449 | uint8_t data = value; |
450 | return m4af_add_itmf_short_tag(ctx, type, M4AF_INTEGER, &data, 1); |
451 | } |
452 | |
453 | int m4af_add_itmf_int16_tag(m4af_writer_t *ctx, uint32_t type, int value) |
454 | { |
455 | uint16_t data = m4af_htob16(value); |
456 | return m4af_add_itmf_short_tag(ctx, type, M4AF_INTEGER, &data, 2); |
457 | } |
458 | |
c5c45908 |
459 | int m4af_add_itmf_int32_tag(m4af_writer_t *ctx, uint32_t type, uint32_t value) |
48e2f01c |
460 | { |
461 | uint32_t data = m4af_htob32(value); |
462 | return m4af_add_itmf_short_tag(ctx, type, M4AF_INTEGER, &data, 4); |
463 | } |
464 | |
c5c45908 |
465 | int m4af_add_itmf_int64_tag(m4af_writer_t *ctx, uint32_t type, uint64_t value) |
466 | { |
467 | uint64_t data = m4af_htob64(value); |
468 | return m4af_add_itmf_short_tag(ctx, type, M4AF_INTEGER, &data, 8); |
469 | } |
470 | |
48e2f01c |
471 | int m4af_add_itmf_track_tag(m4af_writer_t *ctx, int track, int total) |
472 | { |
473 | uint16_t data[4] = { 0 }; |
474 | data[1] = m4af_htob16(track); |
475 | data[2] = m4af_htob16(total); |
476 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('t','r','k','n'), |
477 | M4AF_IMPLICIT, &data, 8); |
478 | } |
479 | |
480 | int m4af_add_itmf_disk_tag(m4af_writer_t *ctx, int disk, int total) |
481 | { |
482 | uint16_t data[3] = { 0 }; |
483 | data[1] = m4af_htob16(disk); |
484 | data[2] = m4af_htob16(total); |
485 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('d','i','s','k'), |
486 | M4AF_IMPLICIT, &data, 6); |
487 | } |
488 | |
489 | int m4af_add_itmf_genre_tag(m4af_writer_t *ctx, int genre) |
490 | { |
491 | uint16_t data = m4af_htob16(genre); |
492 | return m4af_add_itmf_short_tag(ctx, M4AF_FOURCC('g','n','r','e'), |
493 | M4AF_IMPLICIT, &data, 2); |
494 | } |
495 | |
496 | static |
497 | int m4af_set_iTunSMPB(m4af_writer_t *ctx) |
498 | { |
499 | const char *template = " 00000000 %08X %08X %08X%08X 00000000 00000000 " |
500 | "00000000 00000000 00000000 00000000 00000000 00000000"; |
501 | m4af_track_t *track = &ctx->track[0]; |
502 | char buf[256]; |
503 | uint64_t length = track->duration - track->encoder_delay - track->padding; |
504 | sprintf(buf, template, track->encoder_delay, track->padding, |
505 | (uint32_t)(length >> 32), (uint32_t)length); |
506 | return m4af_add_itmf_long_tag(ctx, "iTunSMPB", buf); |
507 | } |
508 | |
509 | static |
510 | void m4af_update_size(m4af_writer_t *ctx, int64_t pos) |
511 | { |
512 | int64_t current_pos = m4af_tell(ctx); |
513 | m4af_set_pos(ctx, pos); |
514 | m4af_write32(ctx, current_pos - pos); |
515 | m4af_set_pos(ctx, current_pos); |
516 | } |
517 | |
48e2f01c |
518 | static |
519 | void m4af_descriptor(m4af_writer_t *ctx, uint32_t tag, uint32_t size) |
520 | { |
521 | uint8_t buf[5]; |
522 | buf[0] = tag; |
523 | buf[1] = ((size >> 21) | 0x80); |
524 | buf[2] = ((size >> 14) | 0x80); |
525 | buf[3] = ((size >> 7) | 0x80); |
526 | buf[4] = (size & 0x7f); |
527 | m4af_write(ctx, buf, 5); |
528 | } |
529 | |
530 | static |
531 | void m4af_ftyp_box(m4af_writer_t *ctx) |
532 | { |
533 | m4af_write(ctx, "\0\0\0\040""ftypM4A \0\0\0\0M4A mp42isom\0\0\0\0", 32); |
534 | } |
535 | |
536 | static |
537 | void m4af_free_box(m4af_writer_t *ctx, uint32_t size) |
538 | { |
539 | int64_t pos = m4af_tell(ctx); |
540 | m4af_write32(ctx, size + 8); |
541 | m4af_write(ctx, "free", 4); |
542 | if (size > 0) |
543 | m4af_set_pos(ctx, pos + size + 8); |
544 | } |
545 | |
546 | int m4af_begin_write(m4af_writer_t *ctx) |
547 | { |
548 | m4af_ftyp_box(ctx); |
549 | m4af_free_box(ctx, 0); |
550 | m4af_write(ctx, "\0\0\0\0mdat", 8); |
551 | ctx->mdat_pos = m4af_tell(ctx); |
552 | return ctx->last_error ? -1 : 0; |
553 | } |
554 | |
555 | static |
556 | void m4af_stco_box(m4af_writer_t *ctx, int track_idx) |
557 | { |
558 | m4af_track_t *track = &ctx->track[track_idx]; |
559 | uint32_t i; |
560 | m4af_chunk_entry_t *index = track->chunk_table; |
561 | int is_co64 = (ctx->mdat_pos + ctx->mdat_size > UINT32_MAX); |
562 | int64_t pos = m4af_tell(ctx); |
563 | |
564 | m4af_write32(ctx, 0); /* size */ |
565 | m4af_write(ctx, is_co64 ? "co64" : "stco", 4); |
566 | m4af_write32(ctx, 0); /* version and flags */ |
567 | m4af_write32(ctx, track->num_chunks); |
568 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
569 | if (is_co64) |
570 | m4af_write64(ctx, index->offset); |
571 | else |
572 | m4af_write32(ctx, index->offset); |
573 | } |
574 | m4af_update_size(ctx, pos); |
575 | } |
576 | |
577 | static |
578 | void m4af_stsz_box(m4af_writer_t *ctx, int track_idx) |
579 | { |
580 | m4af_track_t *track = &ctx->track[track_idx]; |
581 | m4af_sample_entry_t *index = track->sample_table; |
582 | uint32_t i; |
583 | int64_t pos = m4af_tell(ctx); |
584 | m4af_write(ctx, |
585 | "\0\0\0\0" /* size */ |
586 | "stsz" /* type */ |
587 | "\0" /* version */ |
588 | "\0\0\0" /* flags */ |
589 | "\0\0\0\0" /* sample_size: 0(variable) */ |
590 | , 16); |
591 | m4af_write32(ctx, track->num_samples); |
592 | for (i = 0; i < track->num_samples; ++i, ++index) |
593 | m4af_write32(ctx, index->size); |
594 | m4af_update_size(ctx, pos); |
595 | } |
596 | |
597 | static |
598 | void m4af_stsc_box(m4af_writer_t *ctx, int track_idx) |
599 | { |
600 | m4af_track_t *track = &ctx->track[track_idx]; |
601 | m4af_chunk_entry_t *index = track->chunk_table; |
602 | uint32_t i, prev_samples_per_chunk = 0, entry_count = 0; |
603 | int64_t pos = m4af_tell(ctx); |
604 | m4af_write(ctx, |
605 | "\0\0\0\0" /* size */ |
606 | "stsc" /* type */ |
607 | "\0" /* version */ |
608 | "\0\0\0" /* flags */ |
609 | "\0\0\0\0" /* entry_count */ |
610 | , 16); |
611 | |
612 | for (i = 0; i < track->num_chunks; ++i, ++index) { |
613 | if (index->samples_per_chunk != prev_samples_per_chunk) { |
614 | ++entry_count; |
615 | m4af_write32(ctx, i + 1); |
616 | m4af_write32(ctx, index->samples_per_chunk); |
617 | m4af_write32(ctx, 1); /* sample_description_index */ |
618 | prev_samples_per_chunk = index->samples_per_chunk; |
619 | } |
620 | } |
621 | m4af_write32_at(ctx, pos + 12, entry_count); |
622 | m4af_update_size(ctx, pos); |
623 | } |
624 | |
625 | static |
626 | void m4af_stts_box(m4af_writer_t *ctx, int track_idx) |
627 | { |
628 | m4af_track_t *track = &ctx->track[track_idx]; |
629 | m4af_sample_entry_t *index = track->sample_table; |
630 | uint32_t i, prev_delta = 0, entry_count = 0, sample_count = 0; |
631 | int64_t pos = m4af_tell(ctx); |
632 | m4af_write(ctx, |
633 | "\0\0\0\0" /* size */ |
634 | "stts" /* type */ |
635 | "\0" /* version */ |
636 | "\0\0\0" /* flags */ |
637 | "\0\0\0\0" /* entry_count */ |
638 | , 16); |
639 | |
640 | for (i = 0; i < track->num_samples; ++i, ++index) { |
641 | if (index->delta == prev_delta) |
642 | ++sample_count; |
643 | else { |
644 | ++entry_count; |
645 | if (sample_count) { |
646 | m4af_write32(ctx, sample_count); |
647 | m4af_write32(ctx, prev_delta); |
648 | } |
649 | prev_delta = index->delta; |
650 | sample_count = 1; |
651 | } |
652 | } |
653 | if (sample_count) { |
654 | m4af_write32(ctx, sample_count); |
655 | m4af_write32(ctx, prev_delta); |
656 | } |
657 | m4af_write32_at(ctx, pos + 12, entry_count); |
658 | m4af_update_size(ctx, pos); |
659 | } |
660 | |
661 | static |
662 | void m4af_esds_box(m4af_writer_t *ctx, int track_idx) |
663 | { |
664 | m4af_track_t *track = &ctx->track[track_idx]; |
665 | int64_t pos = m4af_tell(ctx); |
666 | m4af_write(ctx, "\0\0\0\0esds", 8); |
667 | m4af_write32(ctx, 0); /* version + flags */ |
668 | |
669 | /* ES_Descriptor */ |
670 | m4af_descriptor(ctx, 3, 32 + track->decSpecificInfoSize); |
671 | m4af_write(ctx, "\0\0\0", 3); |
672 | /* DecoderConfigDescriptor */ |
673 | m4af_descriptor(ctx, 4, 18 + track->decSpecificInfoSize); |
674 | m4af_write(ctx, |
675 | "\x40" /* objectTypeIndication: 0x40(Audio ISO/IEC 14496-3)*/ |
676 | "\x15" /* streamType(6): 0x05(AudioStream) |
677 | * upStream(1) : 0 |
678 | * reserved(1) : 1 |
679 | */ |
680 | , 2); |
681 | m4af_write24(ctx, track->bufferSizeDB); |
682 | m4af_write32(ctx, track->maxBitrate); |
683 | m4af_write32(ctx, track->avgBitrate); |
684 | /* DecoderSpecificInfo */ |
685 | m4af_descriptor(ctx, 5, track->decSpecificInfoSize); |
686 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
687 | /* SLConfigDescriptor */ |
688 | m4af_descriptor(ctx, 6, 1); |
689 | m4af_write(ctx, "\002", 1); /* predefined */ |
690 | |
691 | m4af_update_size(ctx, pos); |
692 | } |
693 | |
694 | static |
695 | void m4af_alac_box(m4af_writer_t *ctx, int track_idx) |
696 | { |
697 | m4af_track_t *track = &ctx->track[track_idx]; |
698 | int64_t pos = m4af_tell(ctx); |
699 | m4af_write(ctx, |
700 | "\0\0\0\0" /* size */ |
701 | "alac" /* type */ |
702 | "\0" /* version */ |
703 | "\0\0\0" /* flags */ |
704 | , 12); |
705 | m4af_write(ctx, track->decSpecificInfo, track->decSpecificInfoSize); |
706 | m4af_update_size(ctx, pos); |
707 | } |
708 | |
709 | static |
710 | void m4af_mp4a_box(m4af_writer_t *ctx, int track_idx) |
711 | { |
712 | m4af_track_t *track = &ctx->track[track_idx]; |
713 | int64_t pos = m4af_tell(ctx); |
714 | m4af_write32(ctx, 0); /* size */ |
715 | m4af_write32(ctx, track->codec); /* mp4a or alac */ |
716 | m4af_write(ctx, |
717 | "\0\0\0\0\0\0" /* reserved */ |
718 | "\0\001" /* data_reference_index: 1 */ |
719 | "\0\0\0\0" /* reserved[0] */ |
720 | "\0\0\0\0" /* reserved[1] */ |
721 | "\0\002" /* channelcount: 2 */ |
722 | "\0\020" /* samplesize: 16 */ |
723 | "\0\0" /* pre_defined */ |
724 | "\0\0" /* reserved */ |
725 | ,24); |
726 | if (track->codec == M4AF_FOURCC('m','p','4','a')) { |
727 | m4af_write32(ctx, track->timescale << 16); |
728 | m4af_esds_box(ctx, track_idx); |
729 | } else { |
730 | m4af_write32(ctx, 44100); |
731 | m4af_alac_box(ctx, track_idx); |
732 | } |
733 | m4af_update_size(ctx, pos); |
734 | } |
735 | |
736 | static |
737 | void m4af_stsd_box(m4af_writer_t *ctx, int track_idx) |
738 | { |
739 | int64_t pos = m4af_tell(ctx); |
740 | m4af_write(ctx, "\0\0\0\0stsd", 8); |
741 | m4af_write(ctx, |
742 | "\0" /* version */ |
743 | "\0\0\0" /* flags */ |
744 | "\0\0\0\001" /* entry_count: 1 */ |
745 | , 8); |
746 | m4af_mp4a_box(ctx, track_idx); |
747 | m4af_update_size(ctx, pos); |
748 | } |
749 | |
750 | static |
751 | void m4af_stbl_box(m4af_writer_t *ctx, int track_idx) |
752 | { |
753 | int64_t pos = m4af_tell(ctx); |
754 | m4af_write(ctx, "\0\0\0\0stbl", 8); |
755 | m4af_stsd_box(ctx, track_idx); |
756 | m4af_stts_box(ctx, track_idx); |
757 | m4af_stsc_box(ctx, track_idx); |
758 | m4af_stsz_box(ctx, track_idx); |
759 | m4af_stco_box(ctx, track_idx); |
760 | m4af_update_size(ctx, pos); |
761 | } |
762 | |
763 | static |
764 | void m4af_url_box(m4af_writer_t *ctx, int track_idx) |
765 | { |
766 | m4af_write(ctx, |
767 | "\0\0\0\014" /* size */ |
768 | "url " /* type */ |
769 | "\0" /* version */ |
770 | "\0\0\001" /* flags: 1(in the same file) */ |
771 | , 12); |
772 | } |
773 | |
774 | static |
775 | void m4af_dref_box(m4af_writer_t *ctx, int track_idx) |
776 | { |
777 | int64_t pos = m4af_tell(ctx); |
778 | m4af_write(ctx, "\0\0\0\0dref", 8); |
779 | m4af_write(ctx, |
780 | "\0" /* version */ |
781 | "\0\0\0" /* flags */ |
782 | "\0\0\0\001" /* entry_count: 1 */ |
783 | ,8); |
784 | m4af_url_box(ctx, track_idx); |
785 | m4af_update_size(ctx, pos); |
786 | } |
787 | |
788 | static |
789 | void m4af_dinf_box(m4af_writer_t *ctx, int track_idx) |
790 | { |
791 | int64_t pos = m4af_tell(ctx); |
792 | m4af_write(ctx, "\0\0\0\0dinf", 8); |
793 | m4af_dref_box(ctx, track_idx); |
794 | m4af_update_size(ctx, pos); |
795 | } |
796 | |
797 | static |
798 | void m4af_smhd_box(m4af_writer_t *ctx, int track_idx) |
799 | { |
800 | m4af_write(ctx, |
801 | "\0\0\0\020" /* size */ |
802 | "smhd" /* type */ |
803 | "\0" /* version */ |
804 | "\0\0\0" /* flags */ |
805 | "\0\0" /* balance */ |
806 | "\0\0" /* reserved */ |
807 | , 16); |
808 | } |
809 | |
810 | static |
811 | void m4af_minf_box(m4af_writer_t *ctx, int track_idx) |
812 | { |
813 | m4af_track_t *track = &ctx->track[track_idx]; |
814 | int64_t pos = m4af_tell(ctx); |
815 | m4af_write(ctx, "\0\0\0\0minf", 8); |
816 | /* TODO: add TEXT support */ |
817 | if (track->codec != M4AF_CODEC_TEXT) |
818 | m4af_smhd_box(ctx, track_idx); |
819 | m4af_dinf_box(ctx, track_idx); |
820 | m4af_stbl_box(ctx, track_idx); |
821 | m4af_update_size(ctx, pos); |
822 | } |
823 | |
824 | static |
825 | void m4af_mdhd_box(m4af_writer_t *ctx, int track_idx) |
826 | { |
827 | m4af_track_t *track = &ctx->track[track_idx]; |
828 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
829 | uint8_t version = (track->creation_time > UINT32_MAX || |
830 | track->modification_time > UINT32_MAX || |
831 | track->duration > UINT32_MAX); |
48e2f01c |
832 | |
833 | m4af_write(ctx, "\0\0\0\0mdhd", 8); |
834 | m4af_write(ctx, &version, 1); |
835 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
836 | if (version) { |
837 | m4af_write64(ctx, track->creation_time); |
838 | m4af_write64(ctx, track->modification_time); |
839 | m4af_write32(ctx, track->timescale); |
840 | m4af_write64(ctx, track->duration); |
841 | } else { |
842 | m4af_write32(ctx, track->creation_time); |
843 | m4af_write32(ctx, track->modification_time); |
844 | m4af_write32(ctx, track->timescale); |
845 | m4af_write32(ctx, track->duration); |
846 | } |
847 | m4af_write(ctx, |
848 | "\x55\xc4" /* language: und */ |
849 | "\0\0" /* pre_defined */ |
850 | , 4); |
851 | m4af_update_size(ctx, pos); |
852 | } |
853 | |
854 | static |
855 | void m4af_hdlr_box(m4af_writer_t *ctx, int track_idx, const char *type) |
856 | { |
857 | int64_t pos = m4af_tell(ctx); |
858 | static const char reserved_and_name[10] = { 0 }; |
859 | |
860 | m4af_write(ctx, |
861 | "\0\0\0\0" /* size */ |
862 | "hdlr" /* type */ |
863 | "\0" /* version */ |
864 | "\0\0\0" /* flags */ |
865 | "\0\0\0\0" /* pre_defined */ |
866 | , 16); |
867 | m4af_write(ctx, type, 4); /* handler_type */ |
868 | /* reserved[0] */ |
869 | m4af_write(ctx, !strcmp(type, "mdir") ? "appl" : "\0\0\0\0", 4); |
870 | /* reserved[1], reserved[2], name */ |
871 | m4af_write(ctx, reserved_and_name, (pos & 1) ? 9 : 10); |
872 | m4af_update_size(ctx, pos); |
873 | } |
874 | |
875 | static |
876 | void m4af_mdia_box(m4af_writer_t *ctx, int track_idx) |
877 | { |
878 | m4af_track_t *track = &ctx->track[track_idx]; |
879 | const char *hdlr = |
880 | (track->codec == M4AF_CODEC_TEXT) ? "text" : "soun"; |
881 | int64_t pos = m4af_tell(ctx); |
882 | m4af_write(ctx, "\0\0\0\0mdia", 8); |
883 | m4af_mdhd_box(ctx, track_idx); |
884 | m4af_hdlr_box(ctx, track_idx, hdlr); |
885 | m4af_minf_box(ctx, track_idx); |
886 | m4af_update_size(ctx, pos); |
887 | } |
888 | |
889 | static |
890 | void m4af_tkhd_box(m4af_writer_t *ctx, int track_idx) |
891 | { |
892 | m4af_track_t *track = &ctx->track[track_idx]; |
893 | int64_t pos = m4af_tell(ctx); |
f67cfe22 |
894 | int64_t duration = |
895 | (double)track->duration / track->timescale * ctx->timescale + .5; |
896 | uint8_t version = (track->creation_time > UINT32_MAX || |
897 | track->modification_time > UINT32_MAX || |
898 | duration > UINT32_MAX); |
48e2f01c |
899 | m4af_write(ctx, "\0\0\0\0tkhd", 8); |
900 | m4af_write(ctx, &version, 1); |
901 | m4af_write(ctx, "\0\0\007", 3); /* flags */ |
902 | if (version) { |
903 | m4af_write64(ctx, track->creation_time); |
904 | m4af_write64(ctx, track->modification_time); |
905 | m4af_write32(ctx, track_idx + 1); |
906 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
907 | , 4); |
f67cfe22 |
908 | m4af_write64(ctx, duration); |
48e2f01c |
909 | } else { |
910 | m4af_write32(ctx, track->creation_time); |
911 | m4af_write32(ctx, track->modification_time); |
912 | m4af_write32(ctx, track_idx + 1); |
913 | m4af_write(ctx, "\0\0\0\0" /* reserved */ |
914 | , 4); |
f67cfe22 |
915 | m4af_write32(ctx, duration); |
48e2f01c |
916 | } |
917 | m4af_write(ctx, |
918 | "\0\0\0\0" /* reserved[0] */ |
919 | "\0\0\0\0" /* reserved[1] */ |
920 | "\0\0" /* layer */ |
921 | "\0\0" /* alternate_group */ |
922 | "\001\0" /* volume: 1.0 */ |
923 | "\0\0" /* reserved */ |
924 | "\0\001\0\0" /* matrix[0] */ |
925 | "\0\0\0\0" /* matrix[1] */ |
926 | "\0\0\0\0" /* matrix[2] */ |
927 | "\0\0\0\0" /* matrix[3] */ |
928 | "\0\001\0\0" /* matrix[4] */ |
929 | "\0\0\0\0" /* matrix[5] */ |
930 | "\0\0\0\0" /* matrix[6] */ |
931 | "\0\0\0\0" /* matrix[7] */ |
932 | "\100\0\0\0" /* matrix[8] */ |
933 | "\0\0\0\0" /* width */ |
934 | "\0\0\0\0" /* height */ |
935 | , 60); |
936 | m4af_update_size(ctx, pos); |
937 | } |
938 | |
939 | static |
940 | void m4af_trak_box(m4af_writer_t *ctx, int track_idx) |
941 | { |
942 | int64_t pos = m4af_tell(ctx); |
943 | m4af_write(ctx, "\0\0\0\0trak", 8); |
944 | m4af_tkhd_box(ctx, track_idx); |
945 | m4af_mdia_box(ctx, track_idx); |
946 | m4af_update_size(ctx, pos); |
947 | } |
948 | |
949 | static |
950 | int64_t m4af_movie_duration(m4af_writer_t *ctx) |
951 | { |
952 | int64_t movie_duration = 0; |
953 | unsigned i; |
954 | for (i = 0; i < ctx->num_tracks; ++i) { |
955 | double x = ctx->track[i].duration; |
f67cfe22 |
956 | int64_t duration = x / ctx->track[i].timescale * ctx->timescale + .5; |
48e2f01c |
957 | if (duration > movie_duration) |
958 | movie_duration = duration; |
959 | } |
960 | return movie_duration; |
961 | } |
962 | |
963 | static |
964 | void m4af_mvhd_box(m4af_writer_t *ctx) |
965 | { |
966 | int64_t pos = m4af_tell(ctx); |
48e2f01c |
967 | int64_t movie_duration = m4af_movie_duration(ctx); |
f67cfe22 |
968 | uint8_t version = (ctx->creation_time > UINT32_MAX || |
969 | ctx->modification_time > UINT32_MAX || |
970 | movie_duration > UINT32_MAX); |
48e2f01c |
971 | |
972 | m4af_write(ctx, "\0\0\0\0mvhd", 8); |
973 | m4af_write(ctx, &version, 1); |
974 | m4af_write(ctx, "\0\0\0", 3); /* flags */ |
975 | if (version) { |
976 | m4af_write64(ctx, ctx->creation_time); |
977 | m4af_write64(ctx, ctx->modification_time); |
978 | m4af_write32(ctx, ctx->timescale); |
979 | m4af_write64(ctx, movie_duration); |
980 | } else { |
981 | m4af_write32(ctx, ctx->creation_time); |
982 | m4af_write32(ctx, ctx->modification_time); |
983 | m4af_write32(ctx, ctx->timescale); |
984 | m4af_write32(ctx, movie_duration); |
985 | } |
986 | m4af_write(ctx, |
987 | "\0\001\0\0" /* rate: 1.0 */ |
988 | "\001\0" /* volume: 1.0 */ |
989 | "\0\0" /* reserved */ |
990 | "\0\0\0\0" /* reserved[0] */ |
991 | "\0\0\0\0" /* reserved[1] */ |
992 | "\0\001\0\0" /* matrix[0] */ |
993 | "\0\0\0\0" /* matrix[1] */ |
994 | "\0\0\0\0" /* matrix[2] */ |
995 | "\0\0\0\0" /* matrix[3] */ |
996 | "\0\001\0\0" /* matrix[4] */ |
997 | "\0\0\0\0" /* matrix[5] */ |
998 | "\0\0\0\0" /* matrix[6] */ |
999 | "\0\0\0\0" /* matrix[7] */ |
1000 | "\100\0\0\0" /* matrix[8] */ |
1001 | "\0\0\0\0" /* pre_defined[0] */ |
1002 | "\0\0\0\0" /* pre_defined[1] */ |
1003 | "\0\0\0\0" /* pre_defined[2] */ |
1004 | "\0\0\0\0" /* pre_defined[3] */ |
1005 | "\0\0\0\0" /* pre_defined[4] */ |
1006 | "\0\0\0\0" /* pre_defined[5] */ |
1007 | , 76); |
1008 | m4af_write32(ctx, ctx->num_tracks + 1); |
1009 | m4af_update_size(ctx, pos); |
1010 | } |
1011 | |
1012 | static |
1013 | void m4af_mean_box(m4af_writer_t *ctx) |
1014 | { |
1015 | m4af_write(ctx, |
1016 | "\0\0\0\034" /* size */ |
1017 | "mean" |
1018 | "\0" /* version */ |
1019 | "\0\0\0" /* flags */ |
1020 | "com.apple.iTunes" /* meaning-string */ |
1021 | , 28); |
1022 | } |
1023 | |
1024 | static |
1025 | void m4af_name_box(m4af_writer_t *ctx, const char *name) |
1026 | { |
1027 | int64_t pos = m4af_tell(ctx); |
1028 | m4af_write(ctx, |
1029 | "\0\0\0\0" /* size */ |
1030 | "name" /* type */ |
1031 | "\0" /* version */ |
1032 | "\0\0\0" /* flags */ |
1033 | , 12); |
1034 | m4af_write(ctx, name, strlen(name)); |
1035 | m4af_update_size(ctx, pos); |
1036 | } |
1037 | |
1038 | static |
1039 | void m4af_data_box(m4af_writer_t *ctx, uint32_t type_code, |
1040 | const char *data, uint32_t data_size) |
1041 | { |
1042 | int64_t pos = m4af_tell(ctx); |
1043 | uint8_t code = type_code; |
1044 | m4af_write(ctx, |
1045 | "\0\0\0\0" /* size */ |
1046 | "data" /* type */ |
1047 | "\0\0" /* reserved */ |
1048 | "\0" /* type_set_indifier */ |
1049 | ,11); |
1050 | m4af_write(ctx, &code, 1); |
1051 | m4af_write(ctx, "\0\0\0\0", 4); /* locale */ |
1052 | m4af_write(ctx, data, data_size); |
1053 | m4af_update_size(ctx, pos); |
1054 | } |
1055 | |
1056 | static |
1057 | void m4af_write_metadata(m4af_writer_t *ctx, m4af_itmf_entry_t *entry) |
1058 | { |
1059 | int64_t pos = m4af_tell(ctx); |
1060 | m4af_write(ctx, "\0\0\0\0", 4); |
1061 | m4af_write32(ctx, entry->type); |
1062 | if (entry->type != M4AF_FOURCC('-','-','-','-')) |
1063 | m4af_data_box(ctx, entry->u.type_code, entry->data, entry->data_size); |
1064 | else { |
1065 | m4af_mean_box(ctx); |
1066 | m4af_name_box(ctx, entry->u.name); |
1067 | m4af_data_box(ctx, 1, entry->data, entry->data_size); |
1068 | } |
1069 | m4af_update_size(ctx, pos); |
1070 | } |
1071 | |
1072 | static |
1073 | void m4af_ilst_box(m4af_writer_t *ctx) |
1074 | { |
1075 | uint32_t i; |
1076 | int64_t pos = m4af_tell(ctx); |
1077 | m4af_write(ctx, "\0\0\0\0ilst", 8); |
1078 | for (i = 0; i < ctx->num_tags; ++i) |
1079 | m4af_write_metadata(ctx, &ctx->itmf_table[i]); |
1080 | m4af_update_size(ctx, pos); |
1081 | } |
1082 | |
1083 | static |
1084 | void m4af_meta_box(m4af_writer_t *ctx) |
1085 | { |
1086 | int64_t pos = m4af_tell(ctx); |
1087 | m4af_write(ctx, |
1088 | "\0\0\0\0" /* size */ |
1089 | "meta" /* type */ |
1090 | "\0" /* version */ |
1091 | "\0\0\0" /* flags */ |
1092 | , 12); |
1093 | m4af_hdlr_box(ctx, 0, "mdir"); |
1094 | m4af_ilst_box(ctx); |
1095 | m4af_update_size(ctx, pos); |
1096 | } |
1097 | |
1098 | static |
1099 | void m4af_udta_box(m4af_writer_t *ctx) |
1100 | { |
1101 | int64_t pos = m4af_tell(ctx); |
1102 | m4af_write(ctx, "\0\0\0\0udta", 8); |
1103 | m4af_meta_box(ctx); |
1104 | m4af_update_size(ctx, pos); |
1105 | } |
1106 | |
1107 | static |
1108 | void m4af_moov_box(m4af_writer_t *ctx) |
1109 | { |
1110 | unsigned i; |
1111 | int64_t pos = m4af_tell(ctx); |
1112 | m4af_write(ctx, "\0\0\0\0moov", 8); |
1113 | m4af_mvhd_box(ctx); |
1114 | for (i = 0; i < ctx->num_tracks; ++i) |
1115 | m4af_trak_box(ctx, i); |
1116 | if (ctx->num_tags) |
1117 | m4af_udta_box(ctx); |
1118 | m4af_update_size(ctx, pos); |
1119 | } |
1120 | |
1121 | static |
1122 | void m4af_finalize_mdat(m4af_writer_t *ctx) |
1123 | { |
1124 | if (ctx->mdat_size + 8 > UINT32_MAX) { |
1125 | m4af_set_pos(ctx, ctx->mdat_pos - 16); |
1126 | m4af_write32(ctx, 1); |
1127 | m4af_write(ctx, "mdat", 4); |
1128 | m4af_write64(ctx, ctx->mdat_size + 16); |
1129 | } else { |
1130 | m4af_set_pos(ctx, ctx->mdat_pos - 8); |
1131 | m4af_write32(ctx, ctx->mdat_size + 8); |
1132 | } |
1133 | m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size); |
1134 | } |
1135 | |
1136 | int m4af_finalize(m4af_writer_t *ctx) |
1137 | { |
1138 | unsigned i; |
1139 | m4af_track_t *track; |
1140 | |
1141 | for (i = 0; i < ctx->num_tracks; ++i) { |
1142 | track = ctx->track + i; |
1143 | if (track->duration) { |
1144 | int64_t track_size = 0; |
7b1f2136 |
1145 | unsigned j; |
48e2f01c |
1146 | for (j = 0; j < track->num_chunks; ++j) |
1147 | track_size += track->chunk_table[j].size; |
1148 | track->avgBitrate = |
1149 | 8.0 * track_size * track->timescale / track->duration + .5; |
1150 | } |
1151 | m4af_flush_chunk(ctx, i); |
1152 | } |
1153 | if (ctx->track[0].encoder_delay || ctx->track[0].padding) |
1154 | m4af_set_iTunSMPB(ctx); |
1155 | m4af_finalize_mdat(ctx); |
1156 | m4af_moov_box(ctx); |
1157 | return ctx->last_error ? -1 : 0; |
1158 | } |
1159 | |
1160 | static |
1161 | void m4af_free_itmf_table(m4af_writer_t *ctx) |
1162 | { |
1163 | uint32_t i; |
1164 | m4af_itmf_entry_t *entry = ctx->itmf_table; |
1165 | for (i = 0; i < ctx->num_tags; ++i, ++entry) { |
1166 | if (entry->type == M4AF_FOURCC('-','-','-','-')) |
1167 | m4af_free(entry->u.name); |
1168 | m4af_free(entry->data); |
1169 | } |
1170 | m4af_free(ctx->itmf_table); |
1171 | } |
1172 | |
1173 | void m4af_teardown(m4af_writer_t **ctxp) |
1174 | { |
1175 | unsigned i; |
1176 | m4af_writer_t *ctx = *ctxp; |
1177 | m4af_track_t *track; |
1178 | for (i = 0; i < ctx->num_tracks; ++i) { |
7b1f2136 |
1179 | track = ctx->track + i; |
1180 | if (track->decSpecificInfo) |
1181 | m4af_free(track->decSpecificInfo); |
1182 | if (track->sample_table) |
1183 | m4af_free(track->sample_table); |
1184 | if (track->chunk_table) |
1185 | m4af_free(track->chunk_table); |
1186 | if (track->chunk_buffer) |
1187 | m4af_free(track->chunk_buffer); |
48e2f01c |
1188 | } |
1189 | if (ctx->itmf_table) |
1190 | m4af_free_itmf_table(ctx); |
1191 | m4af_free(ctx); |
1192 | *ctxp = 0; |
1193 | } |