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comparison src/http/modules/ngx_http_mp4_module.c @ 4085:6492c79e943a

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ngx_http_mp4_module
author Igor Sysoev <igor@sysoev.ru>
date Fri, 09 Sep 2011 10:22:34 +0000
parents
children 3aa3b7bb9f0d
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4084:b7c944d1a5a8 4085:6492c79e943a
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6 #include <ngx_config.h>
7 #include <ngx_core.h>
8 #include <ngx_http.h>
9
10
11 #define NGX_HTTP_MP4_TRAK_ATOM 0
12 #define NGX_HTTP_MP4_TKHD_ATOM 1
13 #define NGX_HTTP_MP4_MDIA_ATOM 2
14 #define NGX_HTTP_MP4_MDHD_ATOM 3
15 #define NGX_HTTP_MP4_HDLR_ATOM 4
16 #define NGX_HTTP_MP4_MINF_ATOM 5
17 #define NGX_HTTP_MP4_VMHD_ATOM 6
18 #define NGX_HTTP_MP4_SMHD_ATOM 7
19 #define NGX_HTTP_MP4_DINF_ATOM 8
20 #define NGX_HTTP_MP4_STBL_ATOM 9
21 #define NGX_HTTP_MP4_STSD_ATOM 10
22 #define NGX_HTTP_MP4_STTS_ATOM 11
23 #define NGX_HTTP_MP4_STTS_DATA 12
24 #define NGX_HTTP_MP4_STSS_ATOM 13
25 #define NGX_HTTP_MP4_STSS_DATA 14
26 #define NGX_HTTP_MP4_CTTS_ATOM 15
27 #define NGX_HTTP_MP4_CTTS_DATA 16
28 #define NGX_HTTP_MP4_STSC_ATOM 17
29 #define NGX_HTTP_MP4_STSC_DATA 18
30 #define NGX_HTTP_MP4_STSZ_ATOM 19
31 #define NGX_HTTP_MP4_STSZ_DATA 20
32 #define NGX_HTTP_MP4_STCO_ATOM 21
33 #define NGX_HTTP_MP4_STCO_DATA 22
34
35 #define NGX_HTTP_MP4_LAST_ATOM NGX_HTTP_MP4_STCO_DATA
36
37
38 typedef struct {
39 size_t buffer_size;
40 size_t max_moov_size;
41 } ngx_http_mp4_conf_t;
42
43
44 typedef struct {
45 uint32_t timescale;
46 uint32_t time_to_sample_entries;
47 uint32_t sample_to_chunk_entries;
48 uint32_t sync_samples_entries;
49 uint32_t composition_offset_entries;
50 uint32_t sample_sizes_entries;
51 uint32_t chunks;
52
53 ngx_uint_t start_sample;
54 ngx_uint_t start_chunk;
55 off_t start_offset;
56
57 size_t tkhd_size;
58 size_t mdhd_size;
59 size_t hdlr_size;
60 size_t vmhd_size;
61 size_t smhd_size;
62 size_t dinf_size;
63 size_t size;
64
65 ngx_chain_t out[NGX_HTTP_MP4_LAST_ATOM + 1];
66
67 ngx_buf_t trak_atom_buf;
68 ngx_buf_t tkhd_atom_buf;
69 ngx_buf_t mdia_atom_buf;
70 ngx_buf_t mdhd_atom_buf;
71 ngx_buf_t hdlr_atom_buf;
72 ngx_buf_t minf_atom_buf;
73 ngx_buf_t vmhd_atom_buf;
74 ngx_buf_t smhd_atom_buf;
75 ngx_buf_t dinf_atom_buf;
76 ngx_buf_t stbl_atom_buf;
77 ngx_buf_t stsd_atom_buf;
78 ngx_buf_t stts_atom_buf;
79 ngx_buf_t stts_data_buf;
80 ngx_buf_t stss_atom_buf;
81 ngx_buf_t stss_data_buf;
82 ngx_buf_t ctts_atom_buf;
83 ngx_buf_t ctts_data_buf;
84 ngx_buf_t stsc_atom_buf;
85 ngx_buf_t stsc_data_buf;
86 ngx_buf_t stsz_atom_buf;
87 ngx_buf_t stsz_data_buf;
88 ngx_buf_t tsco_atom_buf;
89 ngx_buf_t tsco_data_buf;
90 } ngx_http_mp4_trak_t;
91
92
93 typedef struct {
94 ngx_file_t file;
95
96 u_char *buffer;
97 u_char *buffer_start;
98 u_char *buffer_pos;
99 u_char *buffer_end;
100 size_t buffer_size;
101
102 off_t offset;
103 off_t end;
104 off_t content_length;
105 ngx_uint_t start;
106 uint32_t timescale;
107 ngx_http_request_t *request;
108 ngx_array_t trak;
109 ngx_http_mp4_trak_t traks[2];
110
111 size_t ftyp_size;
112 size_t moov_size;
113
114 ngx_chain_t *out;
115 ngx_chain_t ftyp_atom;
116 ngx_chain_t moov_atom;
117 ngx_chain_t mvhd_atom;
118 ngx_chain_t mdat_atom;
119 ngx_chain_t mdat_data;
120
121 ngx_buf_t ftyp_atom_buf;
122 ngx_buf_t moov_atom_buf;
123 ngx_buf_t mvhd_atom_buf;
124 ngx_buf_t mdat_atom_buf;
125 ngx_buf_t mdat_data_buf;
126
127 u_char moov_atom_header[8];
128 u_char mdat_atom_header[16];
129 } ngx_http_mp4_file_t;
130
131
132 typedef struct {
133 char *name;
134 ngx_int_t (*handler)(ngx_http_mp4_file_t *mp4,
135 uint64_t atom_data_size);
136 } ngx_http_mp4_atom_handler_t;
137
138
139 #define ngx_mp4_atom_header(mp4) (mp4->buffer_pos - 8)
140 #define ngx_mp4_atom_data(mp4) mp4->buffer_pos
141 #define ngx_mp4_atom_next(mp4, n) mp4->buffer_pos += n; mp4->offset += n
142
143
144 #define ngx_mp4_set_atom_name(p, n1, n2, n3, n4) \
145 ((u_char *) (p))[4] = n1; \
146 ((u_char *) (p))[5] = n2; \
147 ((u_char *) (p))[6] = n3; \
148 ((u_char *) (p))[7] = n4
149
150 #define ngx_mp4_get_32value(p) \
151 ( (((u_char *) (p))[0] << 24) \
152 + (((u_char *) (p))[1] << 16) \
153 + (((u_char *) (p))[2] << 8) \
154 + (((u_char *) (p))[3]) )
155
156 #define ngx_mp4_set_32value(p, n) \
157 ((u_char *) (p))[0] = (u_char) ((n) >> 24); \
158 ((u_char *) (p))[1] = (u_char) ((n) >> 16); \
159 ((u_char *) (p))[2] = (u_char) ((n) >> 8); \
160 ((u_char *) (p))[3] = (u_char) (n)
161
162 #define ngx_mp4_get_64value(p) \
163 ( ((uint64_t) ((u_char *) (p))[0] << 56) \
164 + ((uint64_t) ((u_char *) (p))[1] << 48) \
165 + ((uint64_t) ((u_char *) (p))[2] << 40) \
166 + ((uint64_t) ((u_char *) (p))[3] << 32) \
167 + ((uint64_t) ((u_char *) (p))[4] << 24) \
168 + ( ((u_char *) (p))[5] << 16) \
169 + ( ((u_char *) (p))[6] << 8) \
170 + ( ((u_char *) (p))[7]) )
171
172 #define ngx_mp4_set_64value(p, n) \
173 ((u_char *) (p))[0] = (u_char) ((n) >> 56); \
174 ((u_char *) (p))[1] = (u_char) ((n) >> 48); \
175 ((u_char *) (p))[2] = (u_char) ((n) >> 40); \
176 ((u_char *) (p))[3] = (u_char) ((n) >> 32); \
177 ((u_char *) (p))[4] = (u_char) ((n) >> 24); \
178 ((u_char *) (p))[5] = (u_char) ((n) >> 16); \
179 ((u_char *) (p))[6] = (u_char) ((n) >> 8); \
180 ((u_char *) (p))[7] = (u_char) (n)
181
182 #define ngx_mp4_last_trak(mp4) \
183 &((ngx_http_mp4_trak_t *) mp4->trak.elts)[mp4->trak.nelts - 1]
184
185
186 static ngx_int_t ngx_http_mp4_process(ngx_http_mp4_file_t *mp4);
187 static ngx_int_t ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
188 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size);
189 static ngx_int_t ngx_http_mp4_read(ngx_http_mp4_file_t *mp4);
190 static ngx_int_t ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4,
191 uint64_t atom_data_size);
192 static ngx_int_t ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4,
193 uint64_t atom_data_size);
194 static ngx_int_t ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4,
195 uint64_t atom_data_size);
196 static size_t ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4,
197 off_t start_offset);
198 static ngx_int_t ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4,
199 uint64_t atom_data_size);
200 static ngx_int_t ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4,
201 uint64_t atom_data_size);
202 static void ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
203 ngx_http_mp4_trak_t *trak);
204 static ngx_int_t ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4,
205 uint64_t atom_data_size);
206 static ngx_int_t ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4,
207 uint64_t atom_data_size);
208 static ngx_int_t ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4,
209 uint64_t atom_data_size);
210 static void ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
211 ngx_http_mp4_trak_t *trak);
212 static ngx_int_t ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4,
213 uint64_t atom_data_size);
214 static ngx_int_t ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4,
215 uint64_t atom_data_size);
216 static ngx_int_t ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4,
217 uint64_t atom_data_size);
218 static void ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
219 ngx_http_mp4_trak_t *trak);
220 static ngx_int_t ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4,
221 uint64_t atom_data_size);
222 static ngx_int_t ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4,
223 uint64_t atom_data_size);
224 static ngx_int_t ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4,
225 uint64_t atom_data_size);
226 static ngx_int_t ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4,
227 uint64_t atom_data_size);
228 static void ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
229 ngx_http_mp4_trak_t *trak);
230 static ngx_int_t ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4,
231 uint64_t atom_data_size);
232 static ngx_int_t ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4,
233 uint64_t atom_data_size);
234 static ngx_int_t ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
235 ngx_http_mp4_trak_t *trak);
236 static ngx_int_t ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4,
237 uint64_t atom_data_size);
238 static ngx_int_t ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
239 ngx_http_mp4_trak_t *trak);
240 static ngx_int_t ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4,
241 uint64_t atom_data_size);
242 static void ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
243 ngx_http_mp4_trak_t *trak);
244 static ngx_int_t ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4,
245 uint64_t atom_data_size);
246 static ngx_int_t ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
247 ngx_http_mp4_trak_t *trak);
248 static ngx_int_t ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4,
249 uint64_t atom_data_size);
250 static void ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
251 ngx_http_mp4_trak_t *trak);
252 static ngx_int_t ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4,
253 uint64_t atom_data_size);
254 static ngx_int_t ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
255 ngx_http_mp4_trak_t *trak);
256 static void ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
257 ngx_http_mp4_trak_t *trak, int32_t adjustment);
258 static char *ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
259 static void *ngx_http_mp4_create_conf(ngx_conf_t *cf);
260 static char *ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child);
261
262 static ngx_command_t ngx_http_mp4_commands[] = {
263
264 { ngx_string("mp4"),
265 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
266 ngx_http_mp4,
267 0,
268 0,
269 NULL },
270
271 { ngx_string("mp4_buffer_size"),
272 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
273 ngx_conf_set_size_slot,
274 NGX_HTTP_LOC_CONF_OFFSET,
275 offsetof(ngx_http_mp4_conf_t, buffer_size),
276 NULL },
277
278 { ngx_string("mp4_max_moov_size"),
279 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
280 ngx_conf_set_size_slot,
281 NGX_HTTP_LOC_CONF_OFFSET,
282 offsetof(ngx_http_mp4_conf_t, max_moov_size),
283 NULL },
284
285 ngx_null_command
286 };
287
288
289 static ngx_http_module_t ngx_http_mp4_module_ctx = {
290 NULL, /* preconfiguration */
291 NULL, /* postconfiguration */
292
293 NULL, /* create main configuration */
294 NULL, /* init main configuration */
295
296 NULL, /* create server configuration */
297 NULL, /* merge server configuration */
298
299 ngx_http_mp4_create_conf, /* create location configuration */
300 ngx_http_mp4_merge_conf /* merge location configuration */
301 };
302
303
304 ngx_module_t ngx_http_mp4_module = {
305 NGX_MODULE_V1,
306 &ngx_http_mp4_module_ctx, /* module context */
307 ngx_http_mp4_commands, /* module directives */
308 NGX_HTTP_MODULE, /* module type */
309 NULL, /* init master */
310 NULL, /* init module */
311 NULL, /* init process */
312 NULL, /* init thread */
313 NULL, /* exit thread */
314 NULL, /* exit process */
315 NULL, /* exit master */
316 NGX_MODULE_V1_PADDING
317 };
318
319
320 static ngx_http_mp4_atom_handler_t ngx_http_mp4_atoms[] = {
321 { "ftyp", ngx_http_mp4_read_ftyp_atom },
322 { "moov", ngx_http_mp4_read_moov_atom },
323 { "mdat", ngx_http_mp4_read_mdat_atom },
324 { NULL, NULL }
325 };
326
327 static ngx_http_mp4_atom_handler_t ngx_http_mp4_moov_atoms[] = {
328 { "mvhd", ngx_http_mp4_read_mvhd_atom },
329 { "trak", ngx_http_mp4_read_trak_atom },
330 { "cmov", ngx_http_mp4_read_cmov_atom },
331 { NULL, NULL }
332 };
333
334 static ngx_http_mp4_atom_handler_t ngx_http_mp4_trak_atoms[] = {
335 { "tkhd", ngx_http_mp4_read_tkhd_atom },
336 { "mdia", ngx_http_mp4_read_mdia_atom },
337 { NULL, NULL }
338 };
339
340 static ngx_http_mp4_atom_handler_t ngx_http_mp4_mdia_atoms[] = {
341 { "mdhd", ngx_http_mp4_read_mdhd_atom },
342 { "hdlr", ngx_http_mp4_read_hdlr_atom },
343 { "minf", ngx_http_mp4_read_minf_atom },
344 { NULL, NULL }
345 };
346
347 static ngx_http_mp4_atom_handler_t ngx_http_mp4_minf_atoms[] = {
348 { "vmhd", ngx_http_mp4_read_vmhd_atom },
349 { "smhd", ngx_http_mp4_read_smhd_atom },
350 { "dinf", ngx_http_mp4_read_dinf_atom },
351 { "stbl", ngx_http_mp4_read_stbl_atom },
352 { NULL, NULL }
353 };
354
355 static ngx_http_mp4_atom_handler_t ngx_http_mp4_stbl_atoms[] = {
356 { "stsd", ngx_http_mp4_read_stsd_atom },
357 { "stts", ngx_http_mp4_read_stts_atom },
358 { "stss", ngx_http_mp4_read_stss_atom },
359 { "ctts", ngx_http_mp4_read_ctts_atom },
360 { "stsc", ngx_http_mp4_read_stsc_atom },
361 { "stsz", ngx_http_mp4_read_stsz_atom },
362 { "stco", ngx_http_mp4_read_stco_atom },
363 { NULL, NULL }
364 };
365
366
367 static ngx_int_t
368 ngx_http_mp4_handler(ngx_http_request_t *r)
369 {
370 u_char *last;
371 size_t root;
372 ngx_int_t rc, start;
373 ngx_uint_t level;
374 ngx_str_t path, value;
375 ngx_log_t *log;
376 ngx_buf_t *b;
377 ngx_chain_t out;
378 ngx_http_mp4_file_t *mp4;
379 ngx_open_file_info_t of;
380 ngx_http_core_loc_conf_t *clcf;
381
382 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
383 return NGX_HTTP_NOT_ALLOWED;
384 }
385
386 if (r->uri.data[r->uri.len - 1] == '/') {
387 return NGX_DECLINED;
388 }
389
390 rc = ngx_http_discard_request_body(r);
391
392 if (rc != NGX_OK) {
393 return rc;
394 }
395
396 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
397 if (last == NULL) {
398 return NGX_HTTP_INTERNAL_SERVER_ERROR;
399 }
400
401 log = r->connection->log;
402
403 path.len = last - path.data;
404
405 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
406 "http mp4 filename: \"%V\"", &path);
407
408 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
409
410 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
411
412 of.read_ahead = clcf->read_ahead;
413 of.valid = clcf->open_file_cache_valid;
414 of.min_uses = clcf->open_file_cache_min_uses;
415 of.errors = clcf->open_file_cache_errors;
416 of.events = clcf->open_file_cache_events;
417
418 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
419 != NGX_OK)
420 {
421 switch (of.err) {
422
423 case 0:
424 return NGX_HTTP_INTERNAL_SERVER_ERROR;
425
426 case NGX_ENOENT:
427 case NGX_ENOTDIR:
428 case NGX_ENAMETOOLONG:
429
430 level = NGX_LOG_ERR;
431 rc = NGX_HTTP_NOT_FOUND;
432 break;
433
434 case NGX_EACCES:
435
436 level = NGX_LOG_ERR;
437 rc = NGX_HTTP_FORBIDDEN;
438 break;
439
440 default:
441
442 level = NGX_LOG_CRIT;
443 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
444 break;
445 }
446
447 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
448 ngx_log_error(level, log, of.err,
449 "%s \"%s\" failed", of.failed, path.data);
450 }
451
452 return rc;
453 }
454
455 if (!of.is_file) {
456
457 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
458 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
459 ngx_close_file_n " \"%s\" failed", path.data);
460 }
461
462 return NGX_DECLINED;
463 }
464
465 r->root_tested = !r->error_page;
466 r->allow_ranges = 1;
467
468 start = -1;
469 r->headers_out.content_length_n = of.size;
470 mp4 = NULL;
471 b = NULL;
472
473 if (r->args.len) {
474
475 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
476
477 start = ngx_atofp(value.data, value.len, 3);
478
479 if (start != NGX_ERROR) {
480 r->allow_ranges = 0;
481
482 mp4 = ngx_pcalloc(r->pool, sizeof(ngx_http_mp4_file_t));
483 if (mp4 == NULL) {
484 return NGX_HTTP_INTERNAL_SERVER_ERROR;
485 }
486
487 mp4->file.fd = of.fd;
488 mp4->file.name = path;
489 mp4->file.log = r->connection->log;;
490 mp4->end = of.size;
491 mp4->start = (ngx_uint_t) start;
492 mp4->request = r;
493
494 switch (ngx_http_mp4_process(mp4)) {
495
496 case NGX_DECLINED:
497 if (mp4->buffer) {
498 ngx_pfree(r->pool, mp4->buffer);
499 }
500
501 ngx_pfree(r->pool, mp4);
502 mp4 = NULL;
503
504 break;
505
506 case NGX_OK:
507 r->headers_out.content_length_n = mp4->content_length;
508 break;
509
510 default: /* NGX_ERROR */
511 if (mp4->buffer) {
512 ngx_pfree(r->pool, mp4->buffer);
513 }
514
515 ngx_pfree(r->pool, mp4);
516
517 return NGX_HTTP_INTERNAL_SERVER_ERROR;
518 }
519 }
520 }
521 }
522
523 log->action = "sending mp4 to client";
524
525 if (clcf->directio <= of.size) {
526
527 /*
528 * DIRECTIO is set on transfer only
529 * to allow kernel to cache "moov" atom
530 */
531
532 if (ngx_directio_on(of.fd) == NGX_FILE_ERROR) {
533 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
534 ngx_directio_on_n " \"%s\" failed", path.data);
535 }
536
537 if (mp4) {
538 mp4->file.directio = 1;
539 }
540 }
541
542 r->headers_out.status = NGX_HTTP_OK;
543 r->headers_out.last_modified_time = of.mtime;
544
545 if (ngx_http_set_content_type(r) != NGX_OK) {
546 return NGX_HTTP_INTERNAL_SERVER_ERROR;
547 }
548
549 if (mp4 == NULL) {
550 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
551 if (b == NULL) {
552 return NGX_HTTP_INTERNAL_SERVER_ERROR;
553 }
554
555 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
556 if (b->file == NULL) {
557 return NGX_HTTP_INTERNAL_SERVER_ERROR;
558 }
559 }
560
561 rc = ngx_http_send_header(r);
562
563 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
564 return rc;
565 }
566
567 if (mp4) {
568 return ngx_http_output_filter(r, mp4->out);
569 }
570
571 b->file_pos = 0;
572 b->file_last = of.size;
573
574 b->in_file = b->file_last ? 1 : 0;
575 b->last_buf = 1;
576 b->last_in_chain = 1;
577
578 b->file->fd = of.fd;
579 b->file->name = path;
580 b->file->log = log;
581 b->file->directio = of.is_directio;
582
583 out.buf = b;
584 out.next = NULL;
585
586 return ngx_http_output_filter(r, &out);
587 }
588
589
590 static ngx_int_t
591 ngx_http_mp4_process(ngx_http_mp4_file_t *mp4)
592 {
593 off_t start_offset, adjustment;
594 ngx_int_t rc;
595 ngx_uint_t i, j;
596 ngx_chain_t **prev;
597 ngx_http_mp4_trak_t *trak;
598 ngx_http_mp4_conf_t *conf;
599
600 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
601 "mp4 start:%ui", mp4->start);
602
603 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
604
605 mp4->buffer_size = conf->buffer_size;
606
607 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_atoms, mp4->end);
608 if (rc != NGX_OK) {
609 return rc;
610 }
611
612 if (mp4->trak.nelts == 0) {
613 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
614 "no mp4 trak atoms were found in \"%s\"",
615 mp4->file.name.data);
616 return NGX_ERROR;
617 }
618
619 if (mp4->mdat_atom.buf == NULL) {
620 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
621 "no mp4 mdat atom was found in \"%s\"",
622 mp4->file.name.data);
623 return NGX_ERROR;
624 }
625
626 prev = &mp4->out;
627
628 if (mp4->ftyp_atom.buf) {
629 *prev = &mp4->ftyp_atom;
630 prev = &mp4->ftyp_atom.next;
631 }
632
633 *prev = &mp4->moov_atom;
634 prev = &mp4->moov_atom.next;
635
636 if (mp4->mvhd_atom.buf) {
637 mp4->moov_size += mp4->mvhd_atom_buf.last - mp4->mvhd_atom_buf.pos;
638 *prev = &mp4->mvhd_atom;
639 prev = &mp4->mvhd_atom.next;
640 }
641
642 start_offset = mp4->end;
643 trak = mp4->trak.elts;
644
645 for (i = 0; i < mp4->trak.nelts; i++) {
646
647 if (ngx_http_mp4_update_stts_atom(mp4, &trak[i]) != NGX_OK) {
648 return NGX_ERROR;
649 }
650
651 if (ngx_http_mp4_update_stss_atom(mp4, &trak[i]) != NGX_OK) {
652 return NGX_ERROR;
653 }
654
655 ngx_http_mp4_update_ctts_atom(mp4, &trak[i]);
656
657 if (ngx_http_mp4_update_stsc_atom(mp4, &trak[i]) != NGX_OK) {
658 return NGX_ERROR;
659 }
660
661 ngx_http_mp4_update_stsz_atom(mp4, &trak[i]);
662
663 if (ngx_http_mp4_update_stco_atom(mp4, &trak[i]) != NGX_OK) {
664 return NGX_ERROR;
665 }
666
667 ngx_http_mp4_update_stbl_atom(mp4, &trak[i]);
668 ngx_http_mp4_update_minf_atom(mp4, &trak[i]);
669 trak[i].size += trak[i].mdhd_size;
670 trak[i].size += trak[i].hdlr_size;
671 ngx_http_mp4_update_mdia_atom(mp4, &trak[i]);
672 trak[i].size += trak[i].tkhd_size;
673 ngx_http_mp4_update_trak_atom(mp4, &trak[i]);
674
675 mp4->moov_size += trak[i].size;
676
677 if (start_offset > trak[i].start_offset) {
678 start_offset = trak[i].start_offset;
679 }
680
681 *prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM];
682 prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM].next;
683
684 for (j = 0; j < NGX_HTTP_MP4_LAST_ATOM + 1; j++) {
685 if (trak[i].out[j].buf) {
686 *prev = &trak[i].out[j];
687 prev = &trak[i].out[j].next;
688 }
689 }
690 }
691
692 mp4->moov_size += 8;
693
694 ngx_mp4_set_32value(mp4->moov_atom_header, mp4->moov_size);
695 ngx_mp4_set_atom_name(mp4->moov_atom_header, 'm', 'o', 'o', 'v');
696 mp4->content_length += mp4->moov_size;
697
698 *prev = &mp4->mdat_atom;
699
700 adjustment = mp4->ftyp_size + mp4->moov_size
701 + ngx_http_mp4_update_mdat_atom(mp4, start_offset)
702 - start_offset;
703
704 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
705 "mp4 adjustment:%D", adjustment);
706
707 for (i = 0; i < mp4->trak.nelts; i++) {
708 ngx_http_mp4_adjust_stco_atom(mp4, &trak[i], (int32_t) adjustment);
709 }
710
711 return NGX_OK;
712 }
713
714
715 typedef struct {
716 u_char size[4];
717 u_char name[4];
718 } ngx_mp4_atom_header_t;
719
720 typedef struct {
721 u_char size[4];
722 u_char name[4];
723 u_char size64[8];
724 } ngx_mp4_atom_header64_t;
725
726
727 static ngx_int_t
728 ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
729 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size)
730 {
731 off_t end;
732 size_t atom_header_size;
733 u_char *atom_header, *atom_name;
734 uint64_t atom_size;
735 ngx_int_t rc;
736 ngx_uint_t n;
737
738 end = mp4->offset + atom_data_size;
739
740 while (mp4->offset < end) {
741
742 if (mp4->buffer_pos + sizeof(uint32_t) > mp4->buffer_end) {
743 if (ngx_http_mp4_read(mp4) != NGX_OK) {
744 return NGX_ERROR;
745 }
746 }
747
748 atom_header = mp4->buffer_pos;
749 atom_size = ngx_mp4_get_32value(atom_header);
750 atom_header_size = sizeof(ngx_mp4_atom_header_t);
751
752 if (atom_size == 0) {
753 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
754 "mp4 atom end");
755 return NGX_OK;
756 }
757
758 if (atom_size < sizeof(ngx_mp4_atom_header_t)) {
759
760 if (atom_size == 1) {
761
762 if (mp4->buffer_pos + sizeof(ngx_mp4_atom_header64_t)
763 > mp4->buffer_end)
764 {
765 if (ngx_http_mp4_read(mp4) != NGX_OK) {
766 return NGX_ERROR;
767 }
768
769 atom_header = mp4->buffer_pos;
770 }
771
772 /* 64-bit atom size */
773 atom_size = ngx_mp4_get_64value(atom_header + 8);
774 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
775
776 } else {
777 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
778 "\"%s\" mp4 atom is too small:%uL",
779 mp4->file.name.data, atom_size);
780 return NGX_ERROR;
781 }
782 }
783
784 if (mp4->buffer_pos + sizeof(ngx_mp4_atom_header_t) > mp4->buffer_end) {
785 if (ngx_http_mp4_read(mp4) != NGX_OK) {
786 return NGX_ERROR;
787 }
788
789 atom_header = mp4->buffer_pos;
790 }
791
792 atom_name = atom_header + sizeof(uint32_t);
793
794 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
795 "mp4 atom: %*s @%O:%uL",
796 4, atom_name, mp4->offset, atom_size);
797
798 for (n = 0; atom[n].name; n++) {
799
800 if (ngx_strncmp(atom_name, atom[n].name, 4) == 0) {
801
802 ngx_mp4_atom_next(mp4, atom_header_size);
803
804 rc = atom[n].handler(mp4, atom_size - atom_header_size);
805 if (rc != NGX_OK) {
806 return rc;
807 }
808
809 goto next;
810 }
811 }
812
813 ngx_mp4_atom_next(mp4, atom_size);
814
815 next:
816 continue;
817 }
818
819 return NGX_OK;
820 }
821
822
823 static ngx_int_t
824 ngx_http_mp4_read(ngx_http_mp4_file_t *mp4)
825 {
826 ngx_int_t n;
827
828 if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) {
829 mp4->buffer_size = (size_t) (mp4->end - mp4->offset);
830 }
831
832 if (mp4->buffer == NULL) {
833 mp4->buffer = ngx_palloc(mp4->request->pool, mp4->buffer_size);
834 if (mp4->buffer == NULL) {
835 return NGX_ERROR;
836 }
837
838 mp4->buffer_start = mp4->buffer;
839 mp4->buffer_end = mp4->buffer + mp4->buffer_size;
840 }
841
842 n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size,
843 mp4->offset);
844
845 if (n == NGX_ERROR) {
846 return NGX_ERROR;
847 }
848
849 if (n == 0) {
850 return NGX_OK;
851 }
852
853 mp4->buffer_pos = mp4->buffer_start;
854
855 return NGX_OK;
856 }
857
858
859 static ngx_int_t
860 ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
861 {
862 u_char *ftyp_atom;
863 size_t atom_size;
864 ngx_buf_t *atom;
865
866 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ftyp atom");
867
868 if (atom_data_size > 1024) {
869 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
870 "\"%s\" mp4 ftyp atom is too large:%uL",
871 mp4->file.name.data, atom_data_size);
872 return NGX_ERROR;
873 }
874
875 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
876
877 ftyp_atom = ngx_palloc(mp4->request->pool, atom_size);
878 if (ftyp_atom == NULL) {
879 return NGX_ERROR;
880 }
881
882 ngx_mp4_set_32value(ftyp_atom, atom_size);
883 ngx_mp4_set_atom_name(ftyp_atom, 'f', 't', 'y', 'p');
884
885 /*
886 * only moov atom content is guaranteed to be in mp4->buffer
887 * during sending response, so ftyp atom content should be copied
888 */
889 ngx_memcpy(ftyp_atom + sizeof(ngx_mp4_atom_header_t),
890 ngx_mp4_atom_data(mp4), (size_t) atom_data_size);
891
892 atom = &mp4->ftyp_atom_buf;
893 atom->temporary = 1;
894 atom->pos = ftyp_atom;
895 atom->last = ftyp_atom + atom_size;
896
897 mp4->ftyp_atom.buf = atom;
898 mp4->ftyp_size = atom_size;
899 mp4->content_length = atom_size;
900
901 ngx_mp4_atom_next(mp4, atom_data_size);
902
903 return NGX_OK;
904 }
905
906
907 /*
908 * Small excess buffer to process atoms after moov atom, mp4->buffer_start
909 * will be set to this buffer part after moov atom processing.
910 */
911 #define NGX_HTTP_MP4_MOOV_BUFFER_EXCESS (4 * 1024)
912
913 static ngx_int_t
914 ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
915 {
916 ngx_int_t rc;
917 ngx_uint_t no_mdat;
918 ngx_buf_t *atom;
919 ngx_http_mp4_conf_t *conf;
920
921 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom");
922
923 no_mdat = (mp4->mdat_atom.buf == NULL);
924
925 if (no_mdat && mp4->start == 0) {
926 /*
927 * send original file if moov atom resides before
928 * mdat atom and client requests integral file
929 */
930 return NGX_DECLINED;
931 }
932
933 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
934
935 if (atom_data_size > mp4->buffer_size) {
936
937 if (atom_data_size > conf->max_moov_size) {
938 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
939 "\"%s\" mp4 moov atom is too large:%uL, "
940 "you may want to increase mp4_max_moov_size",
941 mp4->file.name.data, atom_data_size);
942 return NGX_ERROR;
943 }
944
945 ngx_pfree(mp4->request->pool, mp4->buffer);
946 mp4->buffer = NULL;
947 mp4->buffer_pos = NULL;
948 mp4->buffer_end = NULL;
949
950 mp4->buffer_size = (size_t) atom_data_size
951 + NGX_HTTP_MP4_MOOV_BUFFER_EXCESS * no_mdat;
952 }
953
954 mp4->trak.elts = &mp4->traks;
955 mp4->trak.size = sizeof(ngx_http_mp4_trak_t);
956 mp4->trak.nalloc = 2;
957 mp4->trak.pool = mp4->request->pool;
958
959 atom = &mp4->moov_atom_buf;
960 atom->temporary = 1;
961 atom->pos = mp4->moov_atom_header;
962 atom->last = mp4->moov_atom_header + 8;
963
964 mp4->moov_atom.buf = &mp4->moov_atom_buf;
965
966 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_moov_atoms, atom_data_size);
967
968 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom done");
969
970 if (no_mdat) {
971 mp4->buffer_start = mp4->buffer_pos;
972 mp4->buffer_size = NGX_HTTP_MP4_MOOV_BUFFER_EXCESS;
973
974 } else {
975 /* skip atoms after moov atom */
976 mp4->offset = mp4->end;
977 }
978
979 return rc;
980 }
981
982
983 static ngx_int_t
984 ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
985 {
986 ngx_buf_t *data;
987
988 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom");
989
990 data = &mp4->mdat_data_buf;
991 data->file = &mp4->file;
992 data->in_file = 1;
993 data->last_buf = 1;
994 data->last_in_chain = 1;
995 data->file_last = mp4->offset + atom_data_size;
996
997 mp4->mdat_atom.buf = &mp4->mdat_atom_buf;
998 mp4->mdat_atom.next = &mp4->mdat_data;
999 mp4->mdat_data.buf = data;
1000
1001 if (mp4->trak.nelts) {
1002 /* skip atoms after mdat atom */
1003 mp4->offset = mp4->end;
1004
1005 } else {
1006 ngx_mp4_atom_next(mp4, atom_data_size);
1007 }
1008
1009 return NGX_OK;
1010 }
1011
1012
1013 static size_t
1014 ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset)
1015 {
1016 off_t atom_data_size;
1017 u_char *atom_header;
1018 uint32_t atom_header_size;
1019 uint64_t atom_size;
1020 ngx_buf_t *atom;
1021
1022 atom_data_size = mp4->mdat_data.buf->file_last - start_offset;
1023 mp4->mdat_data.buf->file_pos = start_offset;
1024 mp4->content_length += atom_data_size;
1025
1026 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1027 "mdat new offset @%O:%O", start_offset, atom_data_size);
1028
1029 atom_header = mp4->mdat_atom_header;
1030
1031 if (atom_data_size > 0xffffffff) {
1032 atom_size = 1;
1033 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
1034 ngx_mp4_set_64value(atom_header + sizeof(ngx_mp4_atom_header_t),
1035 sizeof(ngx_mp4_atom_header64_t) + atom_data_size);
1036 } else {
1037 atom_size = sizeof(ngx_mp4_atom_header_t) + atom_data_size;
1038 atom_header_size = sizeof(ngx_mp4_atom_header_t);
1039 }
1040
1041 ngx_mp4_set_32value(atom_header, atom_size);
1042 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'a', 't');
1043
1044 atom = &mp4->mdat_atom_buf;
1045 atom->temporary = 1;
1046 atom->pos = atom_header;
1047 atom->last = atom_header + atom_header_size;
1048
1049 return atom_header_size;
1050 }
1051
1052
1053 typedef struct {
1054 u_char size[4];
1055 u_char name[4];
1056 u_char version[1];
1057 u_char flags[3];
1058 u_char creation_time[4];
1059 u_char modification_time[4];
1060 u_char timescale[4];
1061 u_char duration[4];
1062 u_char rate[4];
1063 u_char volume[2];
1064 u_char reserved[10];
1065 u_char matrix[36];
1066 u_char preview_time[4];
1067 u_char preview_duration[4];
1068 u_char poster_time[4];
1069 u_char selection_time[4];
1070 u_char selection_duration[4];
1071 u_char current_time[4];
1072 u_char next_track_id[4];
1073 } ngx_mp4_mvhd_atom_t;
1074
1075 typedef struct {
1076 u_char size[4];
1077 u_char name[4];
1078 u_char version[1];
1079 u_char flags[3];
1080 u_char creation_time[8];
1081 u_char modification_time[8];
1082 u_char timescale[4];
1083 u_char duration[8];
1084 u_char rate[4];
1085 u_char volume[2];
1086 u_char reserved[10];
1087 u_char matrix[36];
1088 u_char preview_time[4];
1089 u_char preview_duration[4];
1090 u_char poster_time[4];
1091 u_char selection_time[4];
1092 u_char selection_duration[4];
1093 u_char current_time[4];
1094 u_char next_track_id[4];
1095 } ngx_mp4_mvhd64_atom_t;
1096
1097
1098 static ngx_int_t
1099 ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1100 {
1101 u_char *atom_header;
1102 size_t atom_size;
1103 uint32_t timescale;
1104 uint64_t duration;
1105 ngx_buf_t *atom;
1106 ngx_mp4_mvhd_atom_t *mvhd_atom;
1107 ngx_mp4_mvhd64_atom_t *mvhd64_atom;
1108
1109 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom");
1110
1111 atom_header = ngx_mp4_atom_header(mp4);
1112 mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header;
1113 mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header;
1114 ngx_mp4_set_atom_name(atom_header, 'm', 'v', 'h', 'd');
1115
1116 if (mvhd_atom->version[0] == 0) {
1117 /* version 0: 32-bit duration */
1118 timescale = ngx_mp4_get_32value(mvhd_atom->timescale);
1119 duration = ngx_mp4_get_32value(mvhd_atom->duration);
1120
1121 } else {
1122 /* version 1: 64-bit duration */
1123 timescale = ngx_mp4_get_32value(mvhd64_atom->timescale);
1124 duration = ngx_mp4_get_64value(mvhd64_atom->duration);
1125 }
1126
1127 mp4->timescale = timescale;
1128
1129 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1130 "mvhd timescale:%uD, duration:%uL, time:%.3fs",
1131 timescale, duration, (double) duration / timescale);
1132
1133 duration -= (uint64_t) mp4->start * timescale / 1000;
1134
1135 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1136 "mvhd new duration:%uL, time:%.3fs",
1137 duration, (double) duration / timescale);
1138
1139 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1140 ngx_mp4_set_32value(mvhd_atom->size, atom_size);
1141
1142 if (mvhd_atom->version[0] == 0) {
1143 ngx_mp4_set_32value(mvhd_atom->duration, duration);
1144
1145 } else {
1146 ngx_mp4_set_64value(mvhd64_atom->duration, duration);
1147 }
1148
1149 atom = &mp4->mvhd_atom_buf;
1150 atom->temporary = 1;
1151 atom->pos = atom_header;
1152 atom->last = atom_header + atom_size;
1153
1154 mp4->mvhd_atom.buf = atom;
1155
1156 ngx_mp4_atom_next(mp4, atom_data_size);
1157
1158 return NGX_OK;
1159 }
1160
1161
1162 static ngx_int_t
1163 ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1164 {
1165 u_char *atom_header;
1166 ngx_buf_t *atom;
1167 ngx_http_mp4_trak_t *trak;
1168
1169 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom");
1170
1171 trak = ngx_array_push(&mp4->trak);
1172 if (trak == NULL) {
1173 return NGX_ERROR;
1174 }
1175
1176 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1177
1178 atom_header = ngx_mp4_atom_header(mp4);
1179 ngx_mp4_set_atom_name(atom_header, 't', 'r', 'a', 'k');
1180
1181 atom = &trak->trak_atom_buf;
1182 atom->temporary = 1;
1183 atom->pos = atom_header;
1184 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1185
1186 trak->out[NGX_HTTP_MP4_TRAK_ATOM].buf = atom;
1187
1188 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_trak_atoms, atom_data_size);
1189 }
1190
1191
1192 static void
1193 ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
1194 ngx_http_mp4_trak_t *trak)
1195 {
1196 ngx_buf_t *atom;
1197
1198 trak->size += sizeof(ngx_mp4_atom_header_t);
1199 atom = &trak->trak_atom_buf;
1200 ngx_mp4_set_32value(atom->pos, trak->size);
1201 }
1202
1203
1204 static ngx_int_t
1205 ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1206 {
1207 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1208 "\"%s\" mp4 compressed moov atom (cmov) is not supported",
1209 mp4->file.name.data);
1210
1211 return NGX_ERROR;
1212 }
1213
1214
1215 typedef struct {
1216 u_char size[4];
1217 u_char name[4];
1218 u_char version[1];
1219 u_char flags[3];
1220 u_char creation_time[4];
1221 u_char modification_time[4];
1222 u_char track_id[4];
1223 u_char reserved1[4];
1224 u_char duration[4];
1225 u_char reserved2[8];
1226 u_char layer[2];
1227 u_char group[2];
1228 u_char volume[2];
1229 u_char reverved3[2];
1230 u_char matrix[36];
1231 u_char width[4];
1232 u_char heigth[4];
1233 } ngx_mp4_tkhd_atom_t;
1234
1235 typedef struct {
1236 u_char size[4];
1237 u_char name[4];
1238 u_char version[1];
1239 u_char flags[3];
1240 u_char creation_time[8];
1241 u_char modification_time[8];
1242 u_char track_id[4];
1243 u_char reserved1[4];
1244 u_char duration[8];
1245 u_char reserved2[8];
1246 u_char layer[2];
1247 u_char group[2];
1248 u_char volume[2];
1249 u_char reverved3[2];
1250 u_char matrix[36];
1251 u_char width[4];
1252 u_char heigth[4];
1253 } ngx_mp4_tkhd64_atom_t;
1254
1255
1256 static ngx_int_t
1257 ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1258 {
1259 u_char *atom_header;
1260 size_t atom_size;
1261 uint64_t duration;
1262 ngx_buf_t *atom;
1263 ngx_http_mp4_trak_t *trak;
1264 ngx_mp4_tkhd_atom_t *tkhd_atom;
1265 ngx_mp4_tkhd64_atom_t *tkhd64_atom;
1266
1267 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 tkhd atom");
1268
1269 atom_header = ngx_mp4_atom_header(mp4);
1270 tkhd_atom = (ngx_mp4_tkhd_atom_t *) atom_header;
1271 tkhd64_atom = (ngx_mp4_tkhd64_atom_t *) atom_header;
1272 ngx_mp4_set_atom_name(tkhd_atom, 't', 'k', 'h', 'd');
1273
1274 if (tkhd_atom->version[0] == 0) {
1275 /* version 0: 32-bit duration */
1276 duration = ngx_mp4_get_32value(tkhd_atom->duration);
1277
1278 } else {
1279 /* version 1: 64-bit duration */
1280 duration = ngx_mp4_get_64value(tkhd64_atom->duration);
1281 }
1282
1283 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1284 "tkhd duration:%uL, time:%.3fs",
1285 duration, (double) duration / mp4->timescale);
1286
1287 duration -= (uint64_t) mp4->start * mp4->timescale / 1000;
1288
1289 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1290 "tkhd new duration:%uL, time:%.3fs",
1291 duration, (double) duration / mp4->timescale);
1292
1293 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1294
1295 trak = ngx_mp4_last_trak(mp4);
1296 trak->tkhd_size = atom_size;
1297
1298 ngx_mp4_set_32value(tkhd_atom->size, atom_size);
1299
1300 if (tkhd_atom->version[0] == 0) {
1301 ngx_mp4_set_32value(tkhd_atom->duration, duration);
1302
1303 } else {
1304 ngx_mp4_set_64value(tkhd64_atom->duration, duration);
1305 }
1306
1307 atom = &trak->tkhd_atom_buf;
1308 atom->temporary = 1;
1309 atom->pos = atom_header;
1310 atom->last = atom_header + atom_size;
1311
1312 trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf = atom;
1313
1314 ngx_mp4_atom_next(mp4, atom_data_size);
1315
1316 return NGX_OK;
1317 }
1318
1319
1320 static ngx_int_t
1321 ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1322 {
1323 u_char *atom_header;
1324 ngx_buf_t *atom;
1325 ngx_http_mp4_trak_t *trak;
1326
1327 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process mdia atom");
1328
1329 atom_header = ngx_mp4_atom_header(mp4);
1330 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'i', 'a');
1331
1332 trak = ngx_mp4_last_trak(mp4);
1333
1334 atom = &trak->mdia_atom_buf;
1335 atom->temporary = 1;
1336 atom->pos = atom_header;
1337 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1338
1339 trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf = atom;
1340
1341 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_mdia_atoms, atom_data_size);
1342 }
1343
1344
1345 static void
1346 ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
1347 ngx_http_mp4_trak_t *trak)
1348 {
1349 ngx_buf_t *atom;
1350
1351 trak->size += sizeof(ngx_mp4_atom_header_t);
1352 atom = &trak->mdia_atom_buf;
1353 ngx_mp4_set_32value(atom->pos, trak->size);
1354 }
1355
1356
1357 typedef struct {
1358 u_char size[4];
1359 u_char name[4];
1360 u_char version[1];
1361 u_char flags[3];
1362 u_char creation_time[4];
1363 u_char modification_time[4];
1364 u_char timescale[4];
1365 u_char duration[4];
1366 u_char language[2];
1367 u_char quality[2];
1368 } ngx_mp4_mdhd_atom_t;
1369
1370 typedef struct {
1371 u_char size[4];
1372 u_char name[4];
1373 u_char version[1];
1374 u_char flags[3];
1375 u_char creation_time[8];
1376 u_char modification_time[8];
1377 u_char timescale[4];
1378 u_char duration[8];
1379 u_char language[2];
1380 u_char quality[2];
1381 } ngx_mp4_mdhd64_atom_t;
1382
1383
1384 static ngx_int_t
1385 ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1386 {
1387 u_char *atom_header;
1388 size_t atom_size;
1389 uint32_t timescale;
1390 uint64_t duration;
1391 ngx_buf_t *atom;
1392 ngx_http_mp4_trak_t *trak;
1393 ngx_mp4_mdhd_atom_t *mdhd_atom;
1394 ngx_mp4_mdhd64_atom_t *mdhd64_atom;
1395
1396 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdhd atom");
1397
1398 atom_header = ngx_mp4_atom_header(mp4);
1399 mdhd_atom = (ngx_mp4_mdhd_atom_t *) atom_header;
1400 mdhd64_atom = (ngx_mp4_mdhd64_atom_t *) atom_header;
1401 ngx_mp4_set_atom_name(mdhd_atom, 'm', 'd', 'h', 'd');
1402
1403 if (mdhd_atom->version[0] == 0) {
1404 /* version 0: everything is 32-bit */
1405 timescale = ngx_mp4_get_32value(mdhd_atom->timescale);
1406 duration = ngx_mp4_get_32value(mdhd_atom->duration);
1407
1408 } else {
1409 /* version 1: 64-bit duration and 32-bit timescale */
1410 timescale = ngx_mp4_get_32value(mdhd64_atom->timescale);
1411 duration = ngx_mp4_get_64value(mdhd64_atom->duration);
1412 }
1413
1414 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1415 "mdhd timescale:%uD, duration:%uL, time:%.3fs",
1416 timescale, duration, (double) duration / timescale);
1417
1418 duration -= (uint64_t) mp4->start * timescale / 1000;
1419
1420 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1421 "mdhd new duration:%uL, time:%.3fs",
1422 duration, (double) duration / timescale);
1423
1424 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1425
1426 trak = ngx_mp4_last_trak(mp4);
1427 trak->mdhd_size = atom_size;
1428 trak->timescale = timescale;
1429
1430 ngx_mp4_set_32value(mdhd_atom->size, atom_size);
1431
1432 if (mdhd_atom->version[0] == 0) {
1433 ngx_mp4_set_32value(mdhd_atom->duration, duration);
1434
1435 } else {
1436 ngx_mp4_set_64value(mdhd64_atom->duration, duration);
1437 }
1438
1439 atom = &trak->mdhd_atom_buf;
1440 atom->temporary = 1;
1441 atom->pos = atom_header;
1442 atom->last = atom_header + atom_size;
1443
1444 trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf = atom;
1445
1446 ngx_mp4_atom_next(mp4, atom_data_size);
1447
1448 return NGX_OK;
1449 }
1450
1451
1452 static ngx_int_t
1453 ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1454 {
1455 u_char *atom_header;
1456 size_t atom_size;
1457 ngx_buf_t *atom;
1458 ngx_http_mp4_trak_t *trak;
1459
1460 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 hdlr atom");
1461
1462 atom_header = ngx_mp4_atom_header(mp4);
1463 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1464 ngx_mp4_set_32value(atom_header, atom_size);
1465 ngx_mp4_set_atom_name(atom_header, 'h', 'd', 'l', 'r');
1466
1467 trak = ngx_mp4_last_trak(mp4);
1468
1469 atom = &trak->hdlr_atom_buf;
1470 atom->temporary = 1;
1471 atom->pos = atom_header;
1472 atom->last = atom_header + atom_size;
1473
1474 trak->hdlr_size = atom_size;
1475 trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf = atom;
1476
1477 ngx_mp4_atom_next(mp4, atom_data_size);
1478
1479 return NGX_OK;
1480 }
1481
1482
1483 static ngx_int_t
1484 ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1485 {
1486 u_char *atom_header;
1487 ngx_buf_t *atom;
1488 ngx_http_mp4_trak_t *trak;
1489
1490 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process minf atom");
1491
1492 atom_header = ngx_mp4_atom_header(mp4);
1493 ngx_mp4_set_atom_name(atom_header, 'm', 'i', 'n', 'f');
1494
1495 trak = ngx_mp4_last_trak(mp4);
1496
1497 atom = &trak->minf_atom_buf;
1498 atom->temporary = 1;
1499 atom->pos = atom_header;
1500 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1501
1502 trak->out[NGX_HTTP_MP4_MINF_ATOM].buf = atom;
1503
1504 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_minf_atoms, atom_data_size);
1505 }
1506
1507
1508 static void
1509 ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
1510 ngx_http_mp4_trak_t *trak)
1511 {
1512 ngx_buf_t *atom;
1513
1514 trak->size += sizeof(ngx_mp4_atom_header_t)
1515 + trak->vmhd_size
1516 + trak->smhd_size
1517 + trak->dinf_size;
1518 atom = &trak->minf_atom_buf;
1519 ngx_mp4_set_32value(atom->pos, trak->size);
1520 }
1521
1522
1523 static ngx_int_t
1524 ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1525 {
1526 u_char *atom_header;
1527 size_t atom_size;
1528 ngx_buf_t *atom;
1529 ngx_http_mp4_trak_t *trak;
1530
1531 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 vmhd atom");
1532
1533 atom_header = ngx_mp4_atom_header(mp4);
1534 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1535 ngx_mp4_set_32value(atom_header, atom_size);
1536 ngx_mp4_set_atom_name(atom_header, 'v', 'm', 'h', 'd');
1537
1538 trak = ngx_mp4_last_trak(mp4);
1539
1540 atom = &trak->vmhd_atom_buf;
1541 atom->temporary = 1;
1542 atom->pos = atom_header;
1543 atom->last = atom_header + atom_size;
1544
1545 trak->vmhd_size += atom_size;
1546 trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf = atom;
1547
1548 ngx_mp4_atom_next(mp4, atom_data_size);
1549
1550 return NGX_OK;
1551 }
1552
1553
1554 static ngx_int_t
1555 ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1556 {
1557 u_char *atom_header;
1558 size_t atom_size;
1559 ngx_buf_t *atom;
1560 ngx_http_mp4_trak_t *trak;
1561
1562 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 smhd atom");
1563
1564 atom_header = ngx_mp4_atom_header(mp4);
1565 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1566 ngx_mp4_set_32value(atom_header, atom_size);
1567 ngx_mp4_set_atom_name(atom_header, 's', 'm', 'h', 'd');
1568
1569 trak = ngx_mp4_last_trak(mp4);
1570
1571 atom = &trak->smhd_atom_buf;
1572 atom->temporary = 1;
1573 atom->pos = atom_header;
1574 atom->last = atom_header + atom_size;
1575
1576 trak->vmhd_size += atom_size;
1577 trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf = atom;
1578
1579 ngx_mp4_atom_next(mp4, atom_data_size);
1580
1581 return NGX_OK;
1582 }
1583
1584
1585 static ngx_int_t
1586 ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1587 {
1588 u_char *atom_header;
1589 size_t atom_size;
1590 ngx_buf_t *atom;
1591 ngx_http_mp4_trak_t *trak;
1592
1593 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 dinf atom");
1594
1595 atom_header = ngx_mp4_atom_header(mp4);
1596 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1597 ngx_mp4_set_32value(atom_header, atom_size);
1598 ngx_mp4_set_atom_name(atom_header, 'd', 'i', 'n', 'f');
1599
1600 trak = ngx_mp4_last_trak(mp4);
1601
1602 atom = &trak->dinf_atom_buf;
1603 atom->temporary = 1;
1604 atom->pos = atom_header;
1605 atom->last = atom_header + atom_size;
1606
1607 trak->dinf_size += atom_size;
1608 trak->out[NGX_HTTP_MP4_DINF_ATOM].buf = atom;
1609
1610 ngx_mp4_atom_next(mp4, atom_data_size);
1611
1612 return NGX_OK;
1613 }
1614
1615
1616 static ngx_int_t
1617 ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1618 {
1619 u_char *atom_header;
1620 ngx_buf_t *atom;
1621 ngx_http_mp4_trak_t *trak;
1622
1623 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process stbl atom");
1624
1625 atom_header = ngx_mp4_atom_header(mp4);
1626 ngx_mp4_set_atom_name(atom_header, 's', 't', 'b', 'l');
1627
1628 trak = ngx_mp4_last_trak(mp4);
1629
1630 atom = &trak->stbl_atom_buf;
1631 atom->temporary = 1;
1632 atom->pos = atom_header;
1633 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1634
1635 trak->out[NGX_HTTP_MP4_STBL_ATOM].buf = atom;
1636
1637 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_stbl_atoms, atom_data_size);
1638 }
1639
1640
1641 static void
1642 ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
1643 ngx_http_mp4_trak_t *trak)
1644 {
1645 ngx_buf_t *atom;
1646
1647 trak->size += sizeof(ngx_mp4_atom_header_t);
1648 atom = &trak->stbl_atom_buf;
1649 ngx_mp4_set_32value(atom->pos, trak->size);
1650 }
1651
1652
1653 typedef struct {
1654 u_char size[4];
1655 u_char name[4];
1656 u_char version[1];
1657 u_char flags[3];
1658 u_char entries[4];
1659 } ngx_mp4_stsd_atom_t;
1660
1661
1662 static ngx_int_t
1663 ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1664 {
1665 u_char *atom_header, *atom_table;
1666 size_t atom_size;
1667 ngx_buf_t *atom;
1668 ngx_mp4_stsd_atom_t *stsd_atom;
1669 ngx_http_mp4_trak_t *trak;
1670
1671 /* sample description atom */
1672
1673 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsd atom");
1674
1675 atom_header = ngx_mp4_atom_header(mp4);
1676 stsd_atom = (ngx_mp4_stsd_atom_t *) atom_header;
1677 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1678 atom_table = atom_header + atom_size;
1679 ngx_mp4_set_32value(stsd_atom->size, atom_size);
1680 ngx_mp4_set_atom_name(stsd_atom, 's', 't', 's', 'd');
1681
1682 #if (NGX_DEBUG)
1683 {
1684 uint32_t entries;
1685
1686 entries = ngx_mp4_get_32value(stsd_atom->entries);
1687
1688 if (entries) {
1689 /* codecs of interest: avc1 (H.264), mp4a (MPEG-4 audio) */
1690
1691 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1692 "stsd entries:%ui, codec:%*s",
1693 entries, 4, atom_table);
1694 }
1695 }
1696 #endif
1697
1698 trak = ngx_mp4_last_trak(mp4);
1699
1700 atom = &trak->stsd_atom_buf;
1701 atom->temporary = 1;
1702 atom->pos = atom_header;
1703 atom->last = atom_table;
1704
1705 trak->out[NGX_HTTP_MP4_STSD_ATOM].buf = atom;
1706 trak->size += atom_size;
1707
1708 ngx_mp4_atom_next(mp4, atom_data_size);
1709
1710 return NGX_OK;
1711 }
1712
1713
1714 typedef struct {
1715 u_char size[4];
1716 u_char name[4];
1717 u_char version[1];
1718 u_char flags[3];
1719 u_char entries[4];
1720 } ngx_mp4_stts_atom_t;
1721
1722 typedef struct {
1723 u_char count[4];
1724 u_char duration[4];
1725 } ngx_mp4_stts_entry_t;
1726
1727
1728 static ngx_int_t
1729 ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1730 {
1731 u_char *atom_header, *atom_table, *atom_end;
1732 uint32_t entries;
1733 ngx_buf_t *atom, *data;
1734 ngx_mp4_stts_atom_t *stts_atom;
1735 ngx_http_mp4_trak_t *trak;
1736
1737 /* time-to-sample atom */
1738
1739 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom");
1740
1741 atom_header = ngx_mp4_atom_header(mp4);
1742 stts_atom = (ngx_mp4_stts_atom_t *) atom_header;
1743 ngx_mp4_set_atom_name(stts_atom, 's', 't', 't', 's');
1744
1745 entries = ngx_mp4_get_32value(stts_atom->entries);
1746
1747 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1748 "mp4 time-to-sample entries:%ui", entries);
1749
1750 atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t);
1751 atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
1752
1753 if ((uint64_t) (atom_end - stts_atom->version) > atom_data_size) {
1754 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1755 "\"%s\" mp4 stts atom too large",
1756 mp4->file.name.data);
1757 return NGX_ERROR;
1758 }
1759
1760 trak = ngx_mp4_last_trak(mp4);
1761 trak->time_to_sample_entries = entries;
1762
1763 atom = &trak->stts_atom_buf;
1764 atom->temporary = 1;
1765 atom->pos = atom_header;
1766 atom->last = atom_table;
1767
1768 data = &trak->stts_data_buf;
1769 data->temporary = 1;
1770 data->pos = atom_table;
1771 data->last = atom_end;
1772
1773 trak->out[NGX_HTTP_MP4_STTS_ATOM].buf = atom;
1774 trak->out[NGX_HTTP_MP4_STTS_DATA].buf = data;
1775
1776 ngx_mp4_atom_next(mp4, atom_data_size);
1777
1778 return NGX_OK;
1779 }
1780
1781
1782 static ngx_int_t
1783 ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
1784 ngx_http_mp4_trak_t *trak)
1785 {
1786 size_t atom_size;
1787 uint32_t entries, count, duration;
1788 uint64_t start_time;
1789 ngx_buf_t *atom, *data;
1790 ngx_uint_t start_sample;
1791 ngx_mp4_stts_atom_t *stts_atom;
1792 ngx_mp4_stts_entry_t *entry, *end;
1793
1794 /*
1795 * mdia.minf.stbl.stts updating requires trak->timescale
1796 * from mdia.mdhd atom which may reside after mdia.minf
1797 */
1798
1799 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1800 "mp4 stts atom update");
1801
1802 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
1803
1804 if (data == NULL) {
1805 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1806 "no mp4 stts atoms were found in \"%s\"",
1807 mp4->file.name.data);
1808 return NGX_ERROR;
1809 }
1810
1811 entries = trak->time_to_sample_entries;
1812 start_time = mp4->start * trak->timescale / 1000;
1813
1814 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1815 "time-to-sample start_time:%ui", start_time);
1816
1817 start_sample = 0;
1818 entry = (ngx_mp4_stts_entry_t *) data->pos;
1819 end = (ngx_mp4_stts_entry_t *) data->last;
1820
1821 while (entry < end) {
1822 count = ngx_mp4_get_32value(entry->count);
1823 duration = ngx_mp4_get_32value(entry->duration);
1824
1825 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1826 "count:%uD, duration:%uD", count, duration);
1827
1828 if (start_time < count * duration) {
1829 start_sample += (ngx_uint_t) (start_time / duration);
1830 count -= start_sample;
1831 ngx_mp4_set_32value(entry->count, count);
1832 goto found;
1833 }
1834
1835 start_sample += count;
1836 start_time -= count * duration;
1837 entries--;
1838 entry++;
1839 }
1840
1841 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1842 "start time is out mp4 stts samples in \"%\"",
1843 mp4->file.name.data);
1844
1845 return NGX_ERROR;
1846
1847 found:
1848
1849 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1850 "start_sample:%ui, new count:%uD", start_sample, count);
1851
1852 trak->start_sample = start_sample;
1853
1854 data->pos = (u_char *) entry;
1855 atom_size = sizeof(ngx_mp4_stts_atom_t) + (data->last - data->pos);
1856 trak->size += atom_size;
1857
1858 atom = trak->out[NGX_HTTP_MP4_STTS_ATOM].buf;
1859 stts_atom = (ngx_mp4_stts_atom_t *) atom->pos;
1860 ngx_mp4_set_32value(stts_atom->size, atom_size);
1861 ngx_mp4_set_32value(stts_atom->entries, entries);
1862
1863 return NGX_OK;
1864 }
1865
1866
1867 typedef struct {
1868 u_char size[4];
1869 u_char name[4];
1870 u_char version[1];
1871 u_char flags[3];
1872 u_char entries[4];
1873 } ngx_http_mp4_stss_atom_t;
1874
1875
1876 static ngx_int_t
1877 ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1878 {
1879 u_char *atom_header, *atom_table, *atom_end;
1880 uint32_t entries;
1881 ngx_buf_t *atom, *data;
1882 ngx_http_mp4_trak_t *trak;
1883 ngx_http_mp4_stss_atom_t *stss_atom;
1884
1885 /* sync samples atom */
1886
1887 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom");
1888
1889 atom_header = ngx_mp4_atom_header(mp4);
1890 stss_atom = (ngx_http_mp4_stss_atom_t *) atom_header;
1891 ngx_mp4_set_atom_name(stss_atom, 's', 't', 's', 's');
1892
1893 entries = ngx_mp4_get_32value(stss_atom->entries);
1894
1895 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1896 "sync sample entries:%ui", entries);
1897
1898 trak = ngx_mp4_last_trak(mp4);
1899 trak->sync_samples_entries = entries;
1900
1901 atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t);
1902
1903 atom = &trak->stss_atom_buf;
1904 atom->temporary = 1;
1905 atom->pos = atom_header;
1906 atom->last = atom_table;
1907
1908 atom_end = atom_table + entries * sizeof(uint32_t);
1909
1910 if ((uint64_t) (atom_end - stss_atom->version) > atom_data_size) {
1911 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1912 "\"%s\" mp4 stss atom too large", mp4->file.name.data);
1913 return NGX_ERROR;
1914 }
1915
1916 data = &trak->stss_data_buf;
1917 data->temporary = 1;
1918 data->pos = atom_table;
1919 data->last = atom_end;
1920
1921 trak->out[NGX_HTTP_MP4_STSS_ATOM].buf = atom;
1922 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = data;
1923
1924 ngx_mp4_atom_next(mp4, atom_data_size);
1925
1926 return NGX_OK;
1927 }
1928
1929
1930 static ngx_int_t
1931 ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
1932 ngx_http_mp4_trak_t *trak)
1933 {
1934 size_t atom_size;
1935 uint32_t entries, sample, start_sample, *entry, *end;
1936 ngx_buf_t *atom, *data;
1937 ngx_http_mp4_stss_atom_t *stss_atom;
1938
1939 /*
1940 * mdia.minf.stbl.stss updating requires trak->start_sample
1941 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
1942 * atom which may reside after mdia.minf
1943 */
1944
1945 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1946 "mp4 stss atom update");
1947
1948 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
1949
1950 if (data == NULL) {
1951 return NGX_OK;
1952 }
1953
1954 /* sync samples starts from 1 */
1955 start_sample = trak->start_sample + 1;
1956 entries = trak->sync_samples_entries;
1957
1958 entry = (uint32_t *) data->pos;
1959 end = (uint32_t *) data->last;
1960
1961 while (entry < end) {
1962 sample = ngx_mp4_get_32value(entry);
1963
1964 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1965 "start:%uD, sync:%uD", start_sample, sample);
1966
1967 if (sample >= start_sample) {
1968 goto found;
1969 }
1970
1971 entries--;
1972 entry++;
1973 }
1974
1975 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1976 "start sample is out of mp4 stss atom in \"%s\"",
1977 mp4->file.name.data);
1978
1979 return NGX_ERROR;
1980
1981 found:
1982
1983 data->pos = (u_char *) entry;
1984
1985 start_sample = trak->start_sample;
1986
1987 while (entry < end) {
1988 sample = ngx_mp4_get_32value(entry);
1989 sample -= start_sample;
1990 ngx_mp4_set_32value(entry, sample);
1991 entry++;
1992 }
1993
1994 atom_size = sizeof(ngx_http_mp4_stss_atom_t) + (data->last - data->pos);
1995 trak->size += atom_size;
1996
1997 atom = trak->out[NGX_HTTP_MP4_STSS_ATOM].buf;
1998 stss_atom = (ngx_http_mp4_stss_atom_t *) atom->pos;
1999
2000 ngx_mp4_set_32value(stss_atom->size, atom_size);
2001 ngx_mp4_set_32value(stss_atom->entries, entries);
2002
2003 return NGX_OK;
2004 }
2005
2006
2007 typedef struct {
2008 u_char size[4];
2009 u_char name[4];
2010 u_char version[1];
2011 u_char flags[3];
2012 u_char entries[4];
2013 } ngx_mp4_ctts_atom_t;
2014
2015 typedef struct {
2016 u_char count[4];
2017 u_char offset[4];
2018 } ngx_mp4_ctts_entry_t;
2019
2020
2021 static ngx_int_t
2022 ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2023 {
2024 u_char *atom_header, *atom_table, *atom_end;
2025 uint32_t entries;
2026 ngx_buf_t *atom, *data;
2027 ngx_mp4_ctts_atom_t *ctts_atom;
2028 ngx_http_mp4_trak_t *trak;
2029
2030 /* composition offsets atom */
2031
2032 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom");
2033
2034 atom_header = ngx_mp4_atom_header(mp4);
2035 ctts_atom = (ngx_mp4_ctts_atom_t *) atom_header;
2036 ngx_mp4_set_atom_name(ctts_atom, 'c', 't', 't', 's');
2037
2038 entries = ngx_mp4_get_32value(ctts_atom->entries);
2039
2040 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2041 "composition offset entries:%ui", entries);
2042
2043 trak = ngx_mp4_last_trak(mp4);
2044 trak->composition_offset_entries = entries;
2045
2046 atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t);
2047
2048 atom = &trak->ctts_atom_buf;
2049 atom->temporary = 1;
2050 atom->pos = atom_header;
2051 atom->last = atom_table;
2052
2053 atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t);
2054
2055 if ((uint64_t) (atom_end - ctts_atom->version) > atom_data_size) {
2056 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2057 "\"%s\" mp4 ctts atom too large", mp4->file.name.data);
2058 return NGX_ERROR;
2059 }
2060
2061 data = &trak->ctts_data_buf;
2062 data->temporary = 1;
2063 data->pos = atom_table;
2064 data->last = atom_end;
2065
2066 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = atom;
2067 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = data;
2068
2069 ngx_mp4_atom_next(mp4, atom_data_size);
2070
2071 return NGX_OK;
2072 }
2073
2074
2075 static void
2076 ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
2077 ngx_http_mp4_trak_t *trak)
2078 {
2079 size_t atom_size;
2080 uint32_t entries, count, start_sample;
2081 ngx_buf_t *atom, *data;
2082 ngx_mp4_ctts_atom_t *ctts_atom;
2083 ngx_mp4_ctts_entry_t *entry, *end;
2084
2085 /*
2086 * mdia.minf.stbl.ctts updating requires trak->start_sample
2087 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2088 * atom which may reside after mdia.minf
2089 */
2090
2091 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2092 "mp4 ctts atom update");
2093
2094 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2095
2096 if (data == NULL) {
2097 return;
2098 }
2099
2100 /* sync samples starts from 1 */
2101 start_sample = trak->start_sample + 1;
2102 entries = trak->composition_offset_entries;
2103 entry = (ngx_mp4_ctts_entry_t *) data->pos;
2104 end = (ngx_mp4_ctts_entry_t *) data->last;
2105
2106 while (entry < end) {
2107 count = ngx_mp4_get_32value(entry->count);
2108
2109 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2110 "start:%uD, count:%uD, offset:%uD",
2111 start_sample, count, ngx_mp4_get_32value(entry->offset));
2112
2113 if (start_sample <= count) {
2114 count -= (start_sample - 1);
2115 ngx_mp4_set_32value(entry->count, count);
2116 goto found;
2117 }
2118
2119 start_sample -= count;
2120 entries--;
2121 entry++;
2122 }
2123
2124 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL;
2125 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL;
2126
2127 return;
2128
2129 found:
2130
2131 data->pos = (u_char *) entry;
2132 atom_size = sizeof(ngx_mp4_ctts_atom_t) + (data->last - data->pos);
2133 trak->size += atom_size;
2134
2135 atom = trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf;
2136 ctts_atom = (ngx_mp4_ctts_atom_t *) atom->pos;
2137
2138 ngx_mp4_set_32value(ctts_atom->size, atom_size);
2139 ngx_mp4_set_32value(ctts_atom->entries, entries);
2140
2141 return;
2142 }
2143
2144
2145 typedef struct {
2146 u_char size[4];
2147 u_char name[4];
2148 u_char version[1];
2149 u_char flags[3];
2150 u_char entries[4];
2151 } ngx_mp4_stsc_atom_t;
2152
2153 typedef struct {
2154 u_char chunk[4];
2155 u_char samples[4];
2156 u_char id[4];
2157 } ngx_mp4_stsc_entry_t;
2158
2159
2160 static ngx_int_t
2161 ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2162 {
2163 u_char *atom_header, *atom_table, *atom_end;
2164 uint32_t entries;
2165 ngx_buf_t *atom, *data;
2166 ngx_mp4_stsc_atom_t *stsc_atom;
2167 ngx_http_mp4_trak_t *trak;
2168
2169 /* sample-to-chunk atom */
2170
2171 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom");
2172
2173 atom_header = ngx_mp4_atom_header(mp4);
2174 stsc_atom = (ngx_mp4_stsc_atom_t *) atom_header;
2175 ngx_mp4_set_atom_name(stsc_atom, 's', 't', 's', 'c');
2176
2177 entries = ngx_mp4_get_32value(stsc_atom->entries);
2178
2179 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2180 "sample-to-chunk entries:%ui", entries);
2181
2182 atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t);
2183 atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
2184
2185 if ((uint64_t) (atom_end - stsc_atom->version) > atom_data_size) {
2186 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2187 "\"%s\" mp4 stsc atom too large",
2188 mp4->file.name.data);
2189 return NGX_ERROR;
2190 }
2191
2192 trak = ngx_mp4_last_trak(mp4);
2193 trak->sample_to_chunk_entries = entries;
2194
2195 atom = &trak->stsc_atom_buf;
2196 atom->temporary = 1;
2197 atom->pos = atom_header;
2198 atom->last = atom_table;
2199
2200 data = &trak->stsc_data_buf;
2201 data->temporary = 1;
2202 data->pos = atom_table;
2203 data->last = atom_end;
2204
2205 trak->out[NGX_HTTP_MP4_STSC_ATOM].buf = atom;
2206 trak->out[NGX_HTTP_MP4_STSC_DATA].buf = data;
2207
2208 ngx_mp4_atom_next(mp4, atom_data_size);
2209
2210 return NGX_OK;
2211 }
2212
2213
2214 static ngx_int_t
2215 ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
2216 ngx_http_mp4_trak_t *trak)
2217 {
2218 size_t atom_size;
2219 uint32_t entries, chunk, samples, prev_chunk, prev_samples;
2220 ngx_buf_t *atom, *data;
2221 ngx_mp4_stsc_atom_t *stsc_atom;
2222 ngx_mp4_stsc_entry_t *entry, *end;
2223
2224 /*
2225 * mdia.minf.stbl.stsc updating requires trak->start_sample
2226 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2227 * atom which may reside after mdia.minf
2228 */
2229
2230 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2231 "mp4 stsc atom update");
2232
2233 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2234
2235 if (data == NULL) {
2236 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2237 "no mp4 stsc atoms were found in \"%s\"",
2238 mp4->file.name.data);
2239 return NGX_ERROR;
2240 }
2241
2242 chunk = 0;
2243 samples = 1;
2244 prev_chunk = 0;
2245 prev_samples = 0;
2246
2247 entries = trak->sample_to_chunk_entries;
2248 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2249 end = (ngx_mp4_stsc_entry_t *) data->last;
2250
2251 while (entry < end) {
2252
2253 chunk = ngx_mp4_get_32value(entry->chunk);
2254 samples = ngx_mp4_get_32value(entry->samples);
2255
2256 trak->start_sample -= (chunk - prev_chunk) * prev_samples;
2257
2258 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2259 "chunk:%ui, samples:%ui, id:%ui",
2260 chunk, samples, ngx_mp4_get_32value(entry->id));
2261
2262 if (trak->start_sample < samples) {
2263 goto found;
2264 }
2265
2266 prev_chunk = chunk;
2267 prev_samples = samples;
2268 entries--;
2269 entry++;
2270 }
2271
2272 entries++;
2273 entry--;
2274
2275 found:
2276
2277 data->pos = (u_char *) entry;
2278
2279 chunk = trak->start_sample / samples;
2280 trak->start_chunk = chunk;
2281 atom_size = sizeof(ngx_mp4_stsc_atom_t) + (data->last - data->pos);
2282 trak->size += atom_size;
2283
2284 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2285 "start chunk:%ui", chunk);
2286
2287 atom = trak->out[NGX_HTTP_MP4_STSC_ATOM].buf;
2288 stsc_atom = (ngx_mp4_stsc_atom_t *) atom->pos;
2289
2290 ngx_mp4_set_32value(stsc_atom->size, atom_size);
2291 ngx_mp4_set_32value(stsc_atom->entries, entries);
2292
2293 return NGX_OK;
2294 }
2295
2296
2297 typedef struct {
2298 u_char size[4];
2299 u_char name[4];
2300 u_char version[1];
2301 u_char flags[3];
2302 u_char uniform_size[4];
2303 u_char entries[4];
2304 } ngx_mp4_stsz_atom_t;
2305
2306
2307 static ngx_int_t
2308 ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2309 {
2310 u_char *atom_header, *atom_table, *atom_end;
2311 size_t atom_size;
2312 uint32_t entries, size;
2313 ngx_buf_t *atom, *data;
2314 ngx_mp4_stsz_atom_t *stsz_atom;
2315 ngx_http_mp4_trak_t *trak;
2316
2317 /* sample sizes atom */
2318
2319 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom");
2320
2321 atom_header = ngx_mp4_atom_header(mp4);
2322 stsz_atom = (ngx_mp4_stsz_atom_t *) atom_header;
2323 ngx_mp4_set_atom_name(stsz_atom, 's', 't', 's', 'z');
2324
2325 size = ngx_mp4_get_32value(stsz_atom->uniform_size);
2326 entries = ngx_mp4_get_32value(stsz_atom->entries);
2327
2328 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2329 "sample uniform size:%uD, entries:%uD", size, entries);
2330
2331 trak = ngx_mp4_last_trak(mp4);
2332 trak->sample_sizes_entries = entries;
2333
2334 atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t);
2335
2336 atom = &trak->stsz_atom_buf;
2337 atom->temporary = 1;
2338 atom->pos = atom_header;
2339 atom->last = atom_table;
2340
2341 trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf = atom;
2342
2343 if (size == 0) {
2344 atom_end = atom_table + entries * sizeof(uint32_t);
2345
2346 if ((uint64_t) (atom_end - stsz_atom->version) > atom_data_size) {
2347 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2348 "\"%s\" mp4 stsz atom too large",
2349 mp4->file.name.data);
2350 return NGX_ERROR;
2351 }
2352
2353 data = &trak->stsz_data_buf;
2354 data->temporary = 1;
2355 data->pos = atom_table;
2356 data->last = atom_end;
2357
2358 trak->out[NGX_HTTP_MP4_STSZ_DATA].buf = data;
2359
2360 } else {
2361 /* if size != 0 then all samples are the same size */
2362 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
2363 ngx_mp4_set_32value(atom_header, atom_size);
2364 trak->size += atom_size;
2365 }
2366
2367 ngx_mp4_atom_next(mp4, atom_data_size);
2368
2369 return NGX_OK;
2370 }
2371
2372
2373 static void
2374 ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
2375 ngx_http_mp4_trak_t *trak)
2376 {
2377 size_t atom_size;
2378 ngx_buf_t *atom, *data;
2379 ngx_mp4_stsz_atom_t *stsz_atom;
2380
2381 /*
2382 * mdia.minf.stbl.stsz updating requires trak->start_sample
2383 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2384 * atom which may reside after mdia.minf
2385 */
2386
2387 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2388 "mp4 stsz atom update");
2389
2390 data = trak->out[NGX_HTTP_MP4_STSZ_DATA].buf;
2391
2392 if (data) {
2393 data->pos += trak->start_sample * sizeof(uint32_t);
2394 atom_size = sizeof(ngx_mp4_stsz_atom_t) + (data->last - data->pos);
2395 trak->size += atom_size;
2396
2397 atom = trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf;
2398 stsz_atom = (ngx_mp4_stsz_atom_t *) atom->pos;
2399
2400 ngx_mp4_set_32value(stsz_atom->size, atom_size);
2401 ngx_mp4_set_32value(stsz_atom->entries,
2402 trak->sample_sizes_entries - trak->start_sample);
2403 }
2404 }
2405
2406
2407 typedef struct {
2408 u_char size[4];
2409 u_char name[4];
2410 u_char version[1];
2411 u_char flags[3];
2412 u_char entries[4];
2413 } ngx_mp4_stco_atom_t;
2414
2415
2416 static ngx_int_t
2417 ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2418 {
2419 u_char *atom_header, *atom_table, *atom_end;
2420 uint32_t entries;
2421 ngx_buf_t *atom, *data;
2422 ngx_mp4_stco_atom_t *stco_atom;
2423 ngx_http_mp4_trak_t *trak;
2424
2425 /* chunk offsets atom */
2426
2427 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom");
2428
2429 atom_header = ngx_mp4_atom_header(mp4);
2430 stco_atom = (ngx_mp4_stco_atom_t *) atom_header;
2431 ngx_mp4_set_atom_name(stco_atom, 's', 't', 'c', 'o');
2432
2433 entries = ngx_mp4_get_32value(stco_atom->entries);
2434
2435 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
2436
2437 atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t);
2438 atom_end = atom_table + entries * sizeof(uint32_t);
2439
2440 if ((uint64_t) (atom_end - stco_atom->version) > atom_data_size) {
2441 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2442 "\"%s\" mp4 stco atom too large", mp4->file.name.data);
2443 return NGX_ERROR;
2444 }
2445
2446 trak = ngx_mp4_last_trak(mp4);
2447 trak->chunks = entries;
2448
2449 atom = &trak->tsco_atom_buf;
2450 atom->temporary = 1;
2451 atom->pos = atom_header;
2452 atom->last = atom_table;
2453
2454 data = &trak->tsco_data_buf;
2455 data->temporary = 1;
2456 data->pos = atom_table;
2457 data->last = atom_end;
2458
2459 trak->out[NGX_HTTP_MP4_STCO_ATOM].buf = atom;
2460 trak->out[NGX_HTTP_MP4_STCO_DATA].buf = data;
2461
2462 ngx_mp4_atom_next(mp4, atom_data_size);
2463
2464 return NGX_OK;
2465 }
2466
2467
2468 static ngx_int_t
2469 ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
2470 ngx_http_mp4_trak_t *trak)
2471 {
2472 size_t atom_size;
2473 uint32_t start_chunk;
2474 ngx_buf_t *atom, *data;
2475 ngx_mp4_stco_atom_t *stco_atom;
2476
2477 /*
2478 * mdia.minf.stbl.stco updating requires trak->start_chunk
2479 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
2480 * atom which may reside after mdia.minf
2481 */
2482
2483 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2484 "mp4 stco atom update");
2485
2486 if (trak->start_chunk > trak->chunks) {
2487 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2488 "start time is out mp4 stsc chunks in \"%\"",
2489 mp4->file.name.data);
2490 return NGX_ERROR;
2491 }
2492
2493 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
2494
2495 if (data == NULL) {
2496 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2497 "no mp4 stco atoms were found in \"%s\"",
2498 mp4->file.name.data);
2499 return NGX_ERROR;
2500 }
2501
2502 start_chunk = trak->start_chunk;
2503
2504 data->pos += start_chunk * sizeof(uint32_t);
2505 atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos);
2506 trak->size += atom_size;
2507
2508 trak->start_offset = ngx_mp4_get_32value(data->pos);
2509
2510 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2511 "start chunk offset:%uD", trak->start_offset);
2512
2513 atom = trak->out[NGX_HTTP_MP4_STCO_ATOM].buf;
2514 stco_atom = (ngx_mp4_stco_atom_t *) atom->pos;
2515
2516 ngx_mp4_set_32value(stco_atom->size, atom_size);
2517 ngx_mp4_set_32value(stco_atom->entries, trak->chunks - start_chunk);
2518
2519 return NGX_OK;
2520 }
2521
2522
2523 static void
2524 ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
2525 ngx_http_mp4_trak_t *trak, int32_t adjustment)
2526 {
2527 uint32_t offset, *entry, *end;
2528 ngx_buf_t *data;
2529
2530 /*
2531 * moov.trak.mdia.minf.stbl.stco adjustment requires
2532 * minimal start offset of all traks and new moov atom size
2533 */
2534
2535 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2536 "mp4 stco atom adjustment");
2537
2538 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
2539 entry = (uint32_t *) data->pos;
2540 end = (uint32_t *) data->last;
2541
2542 while (entry < end) {
2543 offset = ngx_mp4_get_32value(entry);
2544 offset += adjustment;
2545 ngx_mp4_set_32value(entry, offset);
2546 entry++;
2547 }
2548 }
2549
2550
2551 static char *
2552 ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2553 {
2554 ngx_http_core_loc_conf_t *clcf;
2555
2556 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
2557 clcf->handler = ngx_http_mp4_handler;
2558
2559 return NGX_CONF_OK;
2560 }
2561
2562
2563 static void *
2564 ngx_http_mp4_create_conf(ngx_conf_t *cf)
2565 {
2566 ngx_http_mp4_conf_t *conf;
2567
2568 conf = ngx_palloc(cf->pool, sizeof(ngx_http_mp4_conf_t));
2569 if (conf == NULL) {
2570 return NULL;
2571 }
2572
2573 conf->buffer_size = NGX_CONF_UNSET_SIZE;
2574 conf->max_moov_size = NGX_CONF_UNSET_SIZE;
2575
2576 return conf;
2577 }
2578
2579
2580 static char *
2581 ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child)
2582 {
2583 ngx_http_mp4_conf_t *prev = parent;
2584 ngx_http_mp4_conf_t *conf = child;
2585
2586 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, 512 * 1024);
2587 ngx_conf_merge_size_value(conf->max_moov_size, prev->max_moov_size,
2588 10 * 1024 * 1024);
2589
2590 return NGX_CONF_OK;
2591 }