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 | } |