1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10
11
12 #define NGX_HTTP_MP4_TRAK_ATOM 0
13 #define NGX_HTTP_MP4_TKHD_ATOM 1
14 #define NGX_HTTP_MP4_MDIA_ATOM 2
15 #define NGX_HTTP_MP4_MDHD_ATOM 3
16 #define NGX_HTTP_MP4_HDLR_ATOM 4
17 #define NGX_HTTP_MP4_MINF_ATOM 5
18 #define NGX_HTTP_MP4_VMHD_ATOM 6
19 #define NGX_HTTP_MP4_SMHD_ATOM 7
20 #define NGX_HTTP_MP4_DINF_ATOM 8
21 #define NGX_HTTP_MP4_STBL_ATOM 9
22 #define NGX_HTTP_MP4_STSD_ATOM 10
23 #define NGX_HTTP_MP4_STTS_ATOM 11
24 #define NGX_HTTP_MP4_STTS_DATA 12
25 #define NGX_HTTP_MP4_STSS_ATOM 13
26 #define NGX_HTTP_MP4_STSS_DATA 14
27 #define NGX_HTTP_MP4_CTTS_ATOM 15
28 #define NGX_HTTP_MP4_CTTS_DATA 16
29 #define NGX_HTTP_MP4_STSC_ATOM 17
30 #define NGX_HTTP_MP4_STSC_START 18
31 #define NGX_HTTP_MP4_STSC_DATA 19
32 #define NGX_HTTP_MP4_STSC_END 20
33 #define NGX_HTTP_MP4_STSZ_ATOM 21
34 #define NGX_HTTP_MP4_STSZ_DATA 22
35 #define NGX_HTTP_MP4_STCO_ATOM 23
36 #define NGX_HTTP_MP4_STCO_DATA 24
37 #define NGX_HTTP_MP4_CO64_ATOM 25
38 #define NGX_HTTP_MP4_CO64_DATA 26
39
40 #define NGX_HTTP_MP4_LAST_ATOM NGX_HTTP_MP4_CO64_DATA
41
42
43 typedef struct {
44 size_t buffer_size;
45 size_t max_buffer_size;
46 } ngx_http_mp4_conf_t;
47
48
49 typedef struct {
50 u_char chunk[4];
51 u_char samples[4];
52 u_char id[4];
53 } ngx_mp4_stsc_entry_t;
54
55
56 typedef struct {
57 uint32_t timescale;
58 uint32_t time_to_sample_entries;
59 uint32_t sample_to_chunk_entries;
60 uint32_t sync_samples_entries;
61 uint32_t composition_offset_entries;
62 uint32_t sample_sizes_entries;
63 uint32_t chunks;
64
65 ngx_uint_t start_sample;
66 ngx_uint_t end_sample;
67 ngx_uint_t start_chunk;
68 ngx_uint_t end_chunk;
69 ngx_uint_t start_chunk_samples;
70 ngx_uint_t end_chunk_samples;
71 uint64_t start_chunk_samples_size;
72 uint64_t end_chunk_samples_size;
73 off_t start_offset;
74 off_t end_offset;
75
76 size_t tkhd_size;
77 size_t mdhd_size;
78 size_t hdlr_size;
79 size_t vmhd_size;
80 size_t smhd_size;
81 size_t dinf_size;
82 size_t size;
83
84 ngx_chain_t out[NGX_HTTP_MP4_LAST_ATOM + 1];
85
86 ngx_buf_t trak_atom_buf;
87 ngx_buf_t tkhd_atom_buf;
88 ngx_buf_t mdia_atom_buf;
89 ngx_buf_t mdhd_atom_buf;
90 ngx_buf_t hdlr_atom_buf;
91 ngx_buf_t minf_atom_buf;
92 ngx_buf_t vmhd_atom_buf;
93 ngx_buf_t smhd_atom_buf;
94 ngx_buf_t dinf_atom_buf;
95 ngx_buf_t stbl_atom_buf;
96 ngx_buf_t stsd_atom_buf;
97 ngx_buf_t stts_atom_buf;
98 ngx_buf_t stts_data_buf;
99 ngx_buf_t stss_atom_buf;
100 ngx_buf_t stss_data_buf;
101 ngx_buf_t ctts_atom_buf;
102 ngx_buf_t ctts_data_buf;
103 ngx_buf_t stsc_atom_buf;
104 ngx_buf_t stsc_start_chunk_buf;
105 ngx_buf_t stsc_end_chunk_buf;
106 ngx_buf_t stsc_data_buf;
107 ngx_buf_t stsz_atom_buf;
108 ngx_buf_t stsz_data_buf;
109 ngx_buf_t stco_atom_buf;
110 ngx_buf_t stco_data_buf;
111 ngx_buf_t co64_atom_buf;
112 ngx_buf_t co64_data_buf;
113
114 ngx_mp4_stsc_entry_t stsc_start_chunk_entry;
115 ngx_mp4_stsc_entry_t stsc_end_chunk_entry;
116 } ngx_http_mp4_trak_t;
117
118
119 typedef struct {
120 ngx_file_t file;
121
122 u_char *buffer;
123 u_char *buffer_start;
124 u_char *buffer_pos;
125 u_char *buffer_end;
126 size_t buffer_size;
127
128 off_t offset;
129 off_t end;
130 off_t content_length;
131 ngx_uint_t start;
132 ngx_uint_t length;
133 uint32_t timescale;
134 ngx_http_request_t *request;
135 ngx_array_t trak;
136 ngx_http_mp4_trak_t traks[2];
137
138 size_t ftyp_size;
139 size_t moov_size;
140
141 ngx_chain_t *out;
142 ngx_chain_t ftyp_atom;
143 ngx_chain_t moov_atom;
144 ngx_chain_t mvhd_atom;
145 ngx_chain_t mdat_atom;
146 ngx_chain_t mdat_data;
147
148 ngx_buf_t ftyp_atom_buf;
149 ngx_buf_t moov_atom_buf;
150 ngx_buf_t mvhd_atom_buf;
151 ngx_buf_t mdat_atom_buf;
152 ngx_buf_t mdat_data_buf;
153
154 u_char moov_atom_header[8];
155 u_char mdat_atom_header[16];
156 } ngx_http_mp4_file_t;
157
158
159 typedef struct {
160 char *name;
161 ngx_int_t (*handler)(ngx_http_mp4_file_t *mp4,
162 uint64_t atom_data_size);
163 } ngx_http_mp4_atom_handler_t;
164
165
166 #define ngx_mp4_atom_header(mp4) (mp4->buffer_pos - 8)
167 #define ngx_mp4_atom_data(mp4) mp4->buffer_pos
168 #define ngx_mp4_atom_data_size(t) (uint64_t) (sizeof(t) - 8)
169
170
171 #define ngx_mp4_atom_next(mp4, n) \
172 \
173 if (n > (size_t) (mp4->buffer_end - mp4->buffer_pos)) { \
174 mp4->buffer_pos = mp4->buffer_end; \
175 \
176 } else { \
177 mp4->buffer_pos += (size_t) n; \
178 } \
179 \
180 mp4->offset += n
181
182
183 #define ngx_mp4_set_atom_name(p, n1, n2, n3, n4) \
184 ((u_char *) (p))[4] = n1; \
185 ((u_char *) (p))[5] = n2; \
186 ((u_char *) (p))[6] = n3; \
187 ((u_char *) (p))[7] = n4
188
189 #define ngx_mp4_get_32value(p) \
190 ( ((uint32_t) ((u_char *) (p))[0] << 24) \
191 + ( ((u_char *) (p))[1] << 16) \
192 + ( ((u_char *) (p))[2] << 8) \
193 + ( ((u_char *) (p))[3]) )
194
195 #define ngx_mp4_set_32value(p, n) \
196 ((u_char *) (p))[0] = (u_char) ((n) >> 24); \
197 ((u_char *) (p))[1] = (u_char) ((n) >> 16); \
198 ((u_char *) (p))[2] = (u_char) ((n) >> 8); \
199 ((u_char *) (p))[3] = (u_char) (n)
200
201 #define ngx_mp4_get_64value(p) \
202 ( ((uint64_t) ((u_char *) (p))[0] << 56) \
203 + ((uint64_t) ((u_char *) (p))[1] << 48) \
204 + ((uint64_t) ((u_char *) (p))[2] << 40) \
205 + ((uint64_t) ((u_char *) (p))[3] << 32) \
206 + ((uint64_t) ((u_char *) (p))[4] << 24) \
207 + ( ((u_char *) (p))[5] << 16) \
208 + ( ((u_char *) (p))[6] << 8) \
209 + ( ((u_char *) (p))[7]) )
210
211 #define ngx_mp4_set_64value(p, n) \
212 ((u_char *) (p))[0] = (u_char) ((uint64_t) (n) >> 56); \
213 ((u_char *) (p))[1] = (u_char) ((uint64_t) (n) >> 48); \
214 ((u_char *) (p))[2] = (u_char) ((uint64_t) (n) >> 40); \
215 ((u_char *) (p))[3] = (u_char) ((uint64_t) (n) >> 32); \
216 ((u_char *) (p))[4] = (u_char) ( (n) >> 24); \
217 ((u_char *) (p))[5] = (u_char) ( (n) >> 16); \
218 ((u_char *) (p))[6] = (u_char) ( (n) >> 8); \
219 ((u_char *) (p))[7] = (u_char) (n)
220
221 #define ngx_mp4_last_trak(mp4) \
222 &((ngx_http_mp4_trak_t *) mp4->trak.elts)[mp4->trak.nelts - 1]
223
224
225 static ngx_int_t ngx_http_mp4_handler(ngx_http_request_t *r);
226 static ngx_int_t ngx_http_mp4_atofp(u_char *line, size_t n, size_t point);
227
228 static ngx_int_t ngx_http_mp4_process(ngx_http_mp4_file_t *mp4);
229 static ngx_int_t ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
230 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size);
231 static ngx_int_t ngx_http_mp4_read(ngx_http_mp4_file_t *mp4, size_t size);
232 static ngx_int_t ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4,
233 uint64_t atom_data_size);
234 static ngx_int_t ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4,
235 uint64_t atom_data_size);
236 static ngx_int_t ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4,
237 uint64_t atom_data_size);
238 static size_t ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4,
239 off_t start_offset, off_t end_offset);
240 static ngx_int_t ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4,
241 uint64_t atom_data_size);
242 static ngx_int_t ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4,
243 uint64_t atom_data_size);
244 static void ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
245 ngx_http_mp4_trak_t *trak);
246 static ngx_int_t ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4,
247 uint64_t atom_data_size);
248 static ngx_int_t ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4,
249 uint64_t atom_data_size);
250 static ngx_int_t ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4,
251 uint64_t atom_data_size);
252 static void ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
253 ngx_http_mp4_trak_t *trak);
254 static ngx_int_t ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4,
255 uint64_t atom_data_size);
256 static ngx_int_t ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4,
257 uint64_t atom_data_size);
258 static ngx_int_t ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4,
259 uint64_t atom_data_size);
260 static void ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
261 ngx_http_mp4_trak_t *trak);
262 static ngx_int_t ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4,
263 uint64_t atom_data_size);
264 static ngx_int_t ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4,
265 uint64_t atom_data_size);
266 static ngx_int_t ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4,
267 uint64_t atom_data_size);
268 static ngx_int_t ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4,
269 uint64_t atom_data_size);
270 static void ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
271 ngx_http_mp4_trak_t *trak);
272 static ngx_int_t ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4,
273 uint64_t atom_data_size);
274 static ngx_int_t ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4,
275 uint64_t atom_data_size);
276 static ngx_int_t ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
277 ngx_http_mp4_trak_t *trak);
278 static ngx_int_t ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t *mp4,
279 ngx_http_mp4_trak_t *trak, ngx_uint_t start);
280 static ngx_int_t ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4,
281 uint64_t atom_data_size);
282 static ngx_int_t ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
283 ngx_http_mp4_trak_t *trak);
284 static void ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t *mp4,
285 ngx_http_mp4_trak_t *trak, ngx_uint_t start);
286 static ngx_int_t ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4,
287 uint64_t atom_data_size);
288 static void ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
289 ngx_http_mp4_trak_t *trak);
290 static void ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t *mp4,
291 ngx_http_mp4_trak_t *trak, ngx_uint_t start);
292 static ngx_int_t ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4,
293 uint64_t atom_data_size);
294 static ngx_int_t ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
295 ngx_http_mp4_trak_t *trak);
296 static ngx_int_t ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t *mp4,
297 ngx_http_mp4_trak_t *trak, ngx_uint_t start);
298 static ngx_int_t ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4,
299 uint64_t atom_data_size);
300 static ngx_int_t ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
301 ngx_http_mp4_trak_t *trak);
302 static ngx_int_t ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4,
303 uint64_t atom_data_size);
304 static ngx_int_t ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
305 ngx_http_mp4_trak_t *trak);
306 static void ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
307 ngx_http_mp4_trak_t *trak, int32_t adjustment);
308 static ngx_int_t ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4,
309 uint64_t atom_data_size);
310 static ngx_int_t ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4,
311 ngx_http_mp4_trak_t *trak);
312 static void ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4,
313 ngx_http_mp4_trak_t *trak, off_t adjustment);
314
315 static char *ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
316 static void *ngx_http_mp4_create_conf(ngx_conf_t *cf);
317 static char *ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child);
318
319
320 static ngx_command_t ngx_http_mp4_commands[] = {
321
322 { ngx_string("mp4"),
323 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
324 ngx_http_mp4,
325 0,
326 0,
327 NULL },
328
329 { ngx_string("mp4_buffer_size"),
330 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
331 ngx_conf_set_size_slot,
332 NGX_HTTP_LOC_CONF_OFFSET,
333 offsetof(ngx_http_mp4_conf_t, buffer_size),
334 NULL },
335
336 { ngx_string("mp4_max_buffer_size"),
337 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
338 ngx_conf_set_size_slot,
339 NGX_HTTP_LOC_CONF_OFFSET,
340 offsetof(ngx_http_mp4_conf_t, max_buffer_size),
341 NULL },
342
343 ngx_null_command
344 };
345
346
347 static ngx_http_module_t ngx_http_mp4_module_ctx = {
348 NULL, /* preconfiguration */
349 NULL, /* postconfiguration */
350
351 NULL, /* create main configuration */
352 NULL, /* init main configuration */
353
354 NULL, /* create server configuration */
355 NULL, /* merge server configuration */
356
357 ngx_http_mp4_create_conf, /* create location configuration */
358 ngx_http_mp4_merge_conf /* merge location configuration */
359 };
360
361
362 ngx_module_t ngx_http_mp4_module = {
363 NGX_MODULE_V1,
364 &ngx_http_mp4_module_ctx, /* module context */
365 ngx_http_mp4_commands, /* module directives */
366 NGX_HTTP_MODULE, /* module type */
367 NULL, /* init master */
368 NULL, /* init module */
369 NULL, /* init process */
370 NULL, /* init thread */
371 NULL, /* exit thread */
372 NULL, /* exit process */
373 NULL, /* exit master */
374 NGX_MODULE_V1_PADDING
375 };
376
377
378 static ngx_http_mp4_atom_handler_t ngx_http_mp4_atoms[] = {
379 { "ftyp", ngx_http_mp4_read_ftyp_atom },
380 { "moov", ngx_http_mp4_read_moov_atom },
381 { "mdat", ngx_http_mp4_read_mdat_atom },
382 { NULL, NULL }
383 };
384
385 static ngx_http_mp4_atom_handler_t ngx_http_mp4_moov_atoms[] = {
386 { "mvhd", ngx_http_mp4_read_mvhd_atom },
387 { "trak", ngx_http_mp4_read_trak_atom },
388 { "cmov", ngx_http_mp4_read_cmov_atom },
389 { NULL, NULL }
390 };
391
392 static ngx_http_mp4_atom_handler_t ngx_http_mp4_trak_atoms[] = {
393 { "tkhd", ngx_http_mp4_read_tkhd_atom },
394 { "mdia", ngx_http_mp4_read_mdia_atom },
395 { NULL, NULL }
396 };
397
398 static ngx_http_mp4_atom_handler_t ngx_http_mp4_mdia_atoms[] = {
399 { "mdhd", ngx_http_mp4_read_mdhd_atom },
400 { "hdlr", ngx_http_mp4_read_hdlr_atom },
401 { "minf", ngx_http_mp4_read_minf_atom },
402 { NULL, NULL }
403 };
404
405 static ngx_http_mp4_atom_handler_t ngx_http_mp4_minf_atoms[] = {
406 { "vmhd", ngx_http_mp4_read_vmhd_atom },
407 { "smhd", ngx_http_mp4_read_smhd_atom },
408 { "dinf", ngx_http_mp4_read_dinf_atom },
409 { "stbl", ngx_http_mp4_read_stbl_atom },
410 { NULL, NULL }
411 };
412
413 static ngx_http_mp4_atom_handler_t ngx_http_mp4_stbl_atoms[] = {
414 { "stsd", ngx_http_mp4_read_stsd_atom },
415 { "stts", ngx_http_mp4_read_stts_atom },
416 { "stss", ngx_http_mp4_read_stss_atom },
417 { "ctts", ngx_http_mp4_read_ctts_atom },
418 { "stsc", ngx_http_mp4_read_stsc_atom },
419 { "stsz", ngx_http_mp4_read_stsz_atom },
420 { "stco", ngx_http_mp4_read_stco_atom },
421 { "co64", ngx_http_mp4_read_co64_atom },
422 { NULL, NULL }
423 };
424
425
426 static ngx_int_t
ngx_http_mp4_handler(ngx_http_request_t * r)427 ngx_http_mp4_handler(ngx_http_request_t *r)
428 {
429 u_char *last;
430 size_t root;
431 ngx_int_t rc, start, end;
432 ngx_uint_t level, length;
433 ngx_str_t path, value;
434 ngx_log_t *log;
435 ngx_buf_t *b;
436 ngx_chain_t out;
437 ngx_http_mp4_file_t *mp4;
438 ngx_open_file_info_t of;
439 ngx_http_core_loc_conf_t *clcf;
440
441 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
442 return NGX_HTTP_NOT_ALLOWED;
443 }
444
445 if (r->uri.data[r->uri.len - 1] == '/') {
446 return NGX_DECLINED;
447 }
448
449 rc = ngx_http_discard_request_body(r);
450
451 if (rc != NGX_OK) {
452 return rc;
453 }
454
455 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
456 if (last == NULL) {
457 return NGX_HTTP_INTERNAL_SERVER_ERROR;
458 }
459
460 log = r->connection->log;
461
462 path.len = last - path.data;
463
464 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
465 "http mp4 filename: \"%V\"", &path);
466
467 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
468
469 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
470
471 of.read_ahead = clcf->read_ahead;
472 of.directio = NGX_MAX_OFF_T_VALUE;
473 of.valid = clcf->open_file_cache_valid;
474 of.min_uses = clcf->open_file_cache_min_uses;
475 of.errors = clcf->open_file_cache_errors;
476 of.events = clcf->open_file_cache_events;
477
478 if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
479 return NGX_HTTP_INTERNAL_SERVER_ERROR;
480 }
481
482 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
483 != NGX_OK)
484 {
485 switch (of.err) {
486
487 case 0:
488 return NGX_HTTP_INTERNAL_SERVER_ERROR;
489
490 case NGX_ENOENT:
491 case NGX_ENOTDIR:
492 case NGX_ENAMETOOLONG:
493
494 level = NGX_LOG_ERR;
495 rc = NGX_HTTP_NOT_FOUND;
496 break;
497
498 case NGX_EACCES:
499 #if (NGX_HAVE_OPENAT)
500 case NGX_EMLINK:
501 case NGX_ELOOP:
502 #endif
503
504 level = NGX_LOG_ERR;
505 rc = NGX_HTTP_FORBIDDEN;
506 break;
507
508 default:
509
510 level = NGX_LOG_CRIT;
511 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
512 break;
513 }
514
515 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
516 ngx_log_error(level, log, of.err,
517 "%s \"%s\" failed", of.failed, path.data);
518 }
519
520 return rc;
521 }
522
523 if (!of.is_file) {
524
525 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
526 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
527 ngx_close_file_n " \"%s\" failed", path.data);
528 }
529
530 return NGX_DECLINED;
531 }
532
533 r->root_tested = !r->error_page;
534 r->allow_ranges = 1;
535
536 start = -1;
537 length = 0;
538 r->headers_out.content_length_n = of.size;
539 mp4 = NULL;
540 b = NULL;
541
542 if (r->args.len) {
543
544 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
545
546 /*
547 * A Flash player may send start value with a lot of digits
548 * after dot so a custom function is used instead of ngx_atofp().
549 */
550
551 start = ngx_http_mp4_atofp(value.data, value.len, 3);
552 }
553
554 if (ngx_http_arg(r, (u_char *) "end", 3, &value) == NGX_OK) {
555
556 end = ngx_http_mp4_atofp(value.data, value.len, 3);
557
558 if (end > 0) {
559 if (start < 0) {
560 start = 0;
561 }
562
563 if (end > start) {
564 length = end - start;
565 }
566 }
567 }
568 }
569
570 if (start >= 0) {
571 r->single_range = 1;
572
573 mp4 = ngx_pcalloc(r->pool, sizeof(ngx_http_mp4_file_t));
574 if (mp4 == NULL) {
575 return NGX_HTTP_INTERNAL_SERVER_ERROR;
576 }
577
578 mp4->file.fd = of.fd;
579 mp4->file.name = path;
580 mp4->file.log = r->connection->log;
581 mp4->end = of.size;
582 mp4->start = (ngx_uint_t) start;
583 mp4->length = length;
584 mp4->request = r;
585
586 switch (ngx_http_mp4_process(mp4)) {
587
588 case NGX_DECLINED:
589 if (mp4->buffer) {
590 ngx_pfree(r->pool, mp4->buffer);
591 }
592
593 ngx_pfree(r->pool, mp4);
594 mp4 = NULL;
595
596 break;
597
598 case NGX_OK:
599 r->headers_out.content_length_n = mp4->content_length;
600 break;
601
602 default: /* NGX_ERROR */
603 if (mp4->buffer) {
604 ngx_pfree(r->pool, mp4->buffer);
605 }
606
607 ngx_pfree(r->pool, mp4);
608
609 return NGX_HTTP_INTERNAL_SERVER_ERROR;
610 }
611 }
612
613 log->action = "sending mp4 to client";
614
615 if (clcf->directio <= of.size) {
616
617 /*
618 * DIRECTIO is set on transfer only
619 * to allow kernel to cache "moov" atom
620 */
621
622 if (ngx_directio_on(of.fd) == NGX_FILE_ERROR) {
623 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
624 ngx_directio_on_n " \"%s\" failed", path.data);
625 }
626
627 of.is_directio = 1;
628
629 if (mp4) {
630 mp4->file.directio = 1;
631 }
632 }
633
634 r->headers_out.status = NGX_HTTP_OK;
635 r->headers_out.last_modified_time = of.mtime;
636
637 if (ngx_http_set_etag(r) != NGX_OK) {
638 return NGX_HTTP_INTERNAL_SERVER_ERROR;
639 }
640
641 if (ngx_http_set_content_type(r) != NGX_OK) {
642 return NGX_HTTP_INTERNAL_SERVER_ERROR;
643 }
644
645 if (mp4 == NULL) {
646 b = ngx_calloc_buf(r->pool);
647 if (b == NULL) {
648 return NGX_HTTP_INTERNAL_SERVER_ERROR;
649 }
650
651 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
652 if (b->file == NULL) {
653 return NGX_HTTP_INTERNAL_SERVER_ERROR;
654 }
655 }
656
657 rc = ngx_http_send_header(r);
658
659 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
660 return rc;
661 }
662
663 if (mp4) {
664 return ngx_http_output_filter(r, mp4->out);
665 }
666
667 b->file_pos = 0;
668 b->file_last = of.size;
669
670 b->in_file = b->file_last ? 1 : 0;
671 b->last_buf = (r == r->main) ? 1 : 0;
672 b->last_in_chain = 1;
673
674 b->file->fd = of.fd;
675 b->file->name = path;
676 b->file->log = log;
677 b->file->directio = of.is_directio;
678
679 out.buf = b;
680 out.next = NULL;
681
682 return ngx_http_output_filter(r, &out);
683 }
684
685
686 static ngx_int_t
ngx_http_mp4_atofp(u_char * line,size_t n,size_t point)687 ngx_http_mp4_atofp(u_char *line, size_t n, size_t point)
688 {
689 ngx_int_t value, cutoff, cutlim;
690 ngx_uint_t dot;
691
692 /* same as ngx_atofp(), but allows additional digits */
693
694 if (n == 0) {
695 return NGX_ERROR;
696 }
697
698 cutoff = NGX_MAX_INT_T_VALUE / 10;
699 cutlim = NGX_MAX_INT_T_VALUE % 10;
700
701 dot = 0;
702
703 for (value = 0; n--; line++) {
704
705 if (*line == '.') {
706 if (dot) {
707 return NGX_ERROR;
708 }
709
710 dot = 1;
711 continue;
712 }
713
714 if (*line < '0' || *line > '9') {
715 return NGX_ERROR;
716 }
717
718 if (point == 0) {
719 continue;
720 }
721
722 if (value >= cutoff && (value > cutoff || *line - '0' > cutlim)) {
723 return NGX_ERROR;
724 }
725
726 value = value * 10 + (*line - '0');
727 point -= dot;
728 }
729
730 while (point--) {
731 if (value > cutoff) {
732 return NGX_ERROR;
733 }
734
735 value = value * 10;
736 }
737
738 return value;
739 }
740
741
742 static ngx_int_t
ngx_http_mp4_process(ngx_http_mp4_file_t * mp4)743 ngx_http_mp4_process(ngx_http_mp4_file_t *mp4)
744 {
745 off_t start_offset, end_offset, adjustment;
746 ngx_int_t rc;
747 ngx_uint_t i, j;
748 ngx_chain_t **prev;
749 ngx_http_mp4_trak_t *trak;
750 ngx_http_mp4_conf_t *conf;
751
752 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
753 "mp4 start:%ui, length:%ui", mp4->start, mp4->length);
754
755 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
756
757 mp4->buffer_size = conf->buffer_size;
758
759 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_atoms, mp4->end);
760 if (rc != NGX_OK) {
761 return rc;
762 }
763
764 if (mp4->trak.nelts == 0) {
765 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
766 "no mp4 trak atoms were found in \"%s\"",
767 mp4->file.name.data);
768 return NGX_ERROR;
769 }
770
771 if (mp4->mdat_atom.buf == NULL) {
772 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
773 "no mp4 mdat atom was found in \"%s\"",
774 mp4->file.name.data);
775 return NGX_ERROR;
776 }
777
778 prev = &mp4->out;
779
780 if (mp4->ftyp_atom.buf) {
781 *prev = &mp4->ftyp_atom;
782 prev = &mp4->ftyp_atom.next;
783 }
784
785 *prev = &mp4->moov_atom;
786 prev = &mp4->moov_atom.next;
787
788 if (mp4->mvhd_atom.buf) {
789 mp4->moov_size += mp4->mvhd_atom_buf.last - mp4->mvhd_atom_buf.pos;
790 *prev = &mp4->mvhd_atom;
791 prev = &mp4->mvhd_atom.next;
792 }
793
794 start_offset = mp4->end;
795 end_offset = 0;
796 trak = mp4->trak.elts;
797
798 for (i = 0; i < mp4->trak.nelts; i++) {
799
800 if (ngx_http_mp4_update_stts_atom(mp4, &trak[i]) != NGX_OK) {
801 return NGX_ERROR;
802 }
803
804 if (ngx_http_mp4_update_stss_atom(mp4, &trak[i]) != NGX_OK) {
805 return NGX_ERROR;
806 }
807
808 ngx_http_mp4_update_ctts_atom(mp4, &trak[i]);
809
810 if (ngx_http_mp4_update_stsc_atom(mp4, &trak[i]) != NGX_OK) {
811 return NGX_ERROR;
812 }
813
814 if (ngx_http_mp4_update_stsz_atom(mp4, &trak[i]) != NGX_OK) {
815 return NGX_ERROR;
816 }
817
818 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
819 if (ngx_http_mp4_update_co64_atom(mp4, &trak[i]) != NGX_OK) {
820 return NGX_ERROR;
821 }
822
823 } else {
824 if (ngx_http_mp4_update_stco_atom(mp4, &trak[i]) != NGX_OK) {
825 return NGX_ERROR;
826 }
827 }
828
829 ngx_http_mp4_update_stbl_atom(mp4, &trak[i]);
830 ngx_http_mp4_update_minf_atom(mp4, &trak[i]);
831 trak[i].size += trak[i].mdhd_size;
832 trak[i].size += trak[i].hdlr_size;
833 ngx_http_mp4_update_mdia_atom(mp4, &trak[i]);
834 trak[i].size += trak[i].tkhd_size;
835 ngx_http_mp4_update_trak_atom(mp4, &trak[i]);
836
837 mp4->moov_size += trak[i].size;
838
839 if (start_offset > trak[i].start_offset) {
840 start_offset = trak[i].start_offset;
841 }
842
843 if (end_offset < trak[i].end_offset) {
844 end_offset = trak[i].end_offset;
845 }
846
847 *prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM];
848 prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM].next;
849
850 for (j = 0; j < NGX_HTTP_MP4_LAST_ATOM + 1; j++) {
851 if (trak[i].out[j].buf) {
852 *prev = &trak[i].out[j];
853 prev = &trak[i].out[j].next;
854 }
855 }
856 }
857
858 if (end_offset < start_offset) {
859 end_offset = start_offset;
860 }
861
862 mp4->moov_size += 8;
863
864 ngx_mp4_set_32value(mp4->moov_atom_header, mp4->moov_size);
865 ngx_mp4_set_atom_name(mp4->moov_atom_header, 'm', 'o', 'o', 'v');
866 mp4->content_length += mp4->moov_size;
867
868 *prev = &mp4->mdat_atom;
869
870 if (start_offset > mp4->mdat_data.buf->file_last) {
871 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
872 "start time is out mp4 mdat atom in \"%s\"",
873 mp4->file.name.data);
874 return NGX_ERROR;
875 }
876
877 adjustment = mp4->ftyp_size + mp4->moov_size
878 + ngx_http_mp4_update_mdat_atom(mp4, start_offset, end_offset)
879 - start_offset;
880
881 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
882 "mp4 adjustment:%O", adjustment);
883
884 for (i = 0; i < mp4->trak.nelts; i++) {
885 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
886 ngx_http_mp4_adjust_co64_atom(mp4, &trak[i], adjustment);
887 } else {
888 ngx_http_mp4_adjust_stco_atom(mp4, &trak[i], (int32_t) adjustment);
889 }
890 }
891
892 return NGX_OK;
893 }
894
895
896 typedef struct {
897 u_char size[4];
898 u_char name[4];
899 } ngx_mp4_atom_header_t;
900
901 typedef struct {
902 u_char size[4];
903 u_char name[4];
904 u_char size64[8];
905 } ngx_mp4_atom_header64_t;
906
907
908 static ngx_int_t
ngx_http_mp4_read_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_atom_handler_t * atom,uint64_t atom_data_size)909 ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
910 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size)
911 {
912 off_t end;
913 size_t atom_header_size;
914 u_char *atom_header, *atom_name;
915 uint64_t atom_size;
916 ngx_int_t rc;
917 ngx_uint_t n;
918
919 end = mp4->offset + atom_data_size;
920
921 while (mp4->offset < end) {
922
923 if (ngx_http_mp4_read(mp4, sizeof(uint32_t)) != NGX_OK) {
924 return NGX_ERROR;
925 }
926
927 atom_header = mp4->buffer_pos;
928 atom_size = ngx_mp4_get_32value(atom_header);
929 atom_header_size = sizeof(ngx_mp4_atom_header_t);
930
931 if (atom_size == 0) {
932 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
933 "mp4 atom end");
934 return NGX_OK;
935 }
936
937 if (atom_size < sizeof(ngx_mp4_atom_header_t)) {
938
939 if (atom_size == 1) {
940
941 if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header64_t))
942 != NGX_OK)
943 {
944 return NGX_ERROR;
945 }
946
947 /* 64-bit atom size */
948 atom_header = mp4->buffer_pos;
949 atom_size = ngx_mp4_get_64value(atom_header + 8);
950 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
951
952 if (atom_size < sizeof(ngx_mp4_atom_header64_t)) {
953 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
954 "\"%s\" mp4 atom is too small:%uL",
955 mp4->file.name.data, atom_size);
956 return NGX_ERROR;
957 }
958
959 } else {
960 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
961 "\"%s\" mp4 atom is too small:%uL",
962 mp4->file.name.data, atom_size);
963 return NGX_ERROR;
964 }
965 }
966
967 if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header_t)) != NGX_OK) {
968 return NGX_ERROR;
969 }
970
971 atom_header = mp4->buffer_pos;
972 atom_name = atom_header + sizeof(uint32_t);
973
974 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
975 "mp4 atom: %*s @%O:%uL",
976 (size_t) 4, atom_name, mp4->offset, atom_size);
977
978 if (atom_size > (uint64_t) (NGX_MAX_OFF_T_VALUE - mp4->offset)
979 || mp4->offset + (off_t) atom_size > end)
980 {
981 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
982 "\"%s\" mp4 atom too large:%uL",
983 mp4->file.name.data, atom_size);
984 return NGX_ERROR;
985 }
986
987 for (n = 0; atom[n].name; n++) {
988
989 if (ngx_strncmp(atom_name, atom[n].name, 4) == 0) {
990
991 ngx_mp4_atom_next(mp4, atom_header_size);
992
993 rc = atom[n].handler(mp4, atom_size - atom_header_size);
994 if (rc != NGX_OK) {
995 return rc;
996 }
997
998 goto next;
999 }
1000 }
1001
1002 ngx_mp4_atom_next(mp4, atom_size);
1003
1004 next:
1005 continue;
1006 }
1007
1008 return NGX_OK;
1009 }
1010
1011
1012 static ngx_int_t
ngx_http_mp4_read(ngx_http_mp4_file_t * mp4,size_t size)1013 ngx_http_mp4_read(ngx_http_mp4_file_t *mp4, size_t size)
1014 {
1015 ssize_t n;
1016
1017 if (mp4->buffer_pos + size <= mp4->buffer_end) {
1018 return NGX_OK;
1019 }
1020
1021 if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) {
1022 mp4->buffer_size = (size_t) (mp4->end - mp4->offset);
1023 }
1024
1025 if (mp4->buffer_size < size) {
1026 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1027 "\"%s\" mp4 file truncated", mp4->file.name.data);
1028 return NGX_ERROR;
1029 }
1030
1031 if (mp4->buffer == NULL) {
1032 mp4->buffer = ngx_palloc(mp4->request->pool, mp4->buffer_size);
1033 if (mp4->buffer == NULL) {
1034 return NGX_ERROR;
1035 }
1036
1037 mp4->buffer_start = mp4->buffer;
1038 }
1039
1040 n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size,
1041 mp4->offset);
1042
1043 if (n == NGX_ERROR) {
1044 return NGX_ERROR;
1045 }
1046
1047 if ((size_t) n != mp4->buffer_size) {
1048 ngx_log_error(NGX_LOG_CRIT, mp4->file.log, 0,
1049 ngx_read_file_n " read only %z of %z from \"%s\"",
1050 n, mp4->buffer_size, mp4->file.name.data);
1051 return NGX_ERROR;
1052 }
1053
1054 mp4->buffer_pos = mp4->buffer_start;
1055 mp4->buffer_end = mp4->buffer_start + mp4->buffer_size;
1056
1057 return NGX_OK;
1058 }
1059
1060
1061 static ngx_int_t
ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1062 ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1063 {
1064 u_char *ftyp_atom;
1065 size_t atom_size;
1066 ngx_buf_t *atom;
1067
1068 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ftyp atom");
1069
1070 if (atom_data_size > 1024
1071 || ngx_mp4_atom_data(mp4) + (size_t) atom_data_size > mp4->buffer_end)
1072 {
1073 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1074 "\"%s\" mp4 ftyp atom is too large:%uL",
1075 mp4->file.name.data, atom_data_size);
1076 return NGX_ERROR;
1077 }
1078
1079 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1080
1081 ftyp_atom = ngx_palloc(mp4->request->pool, atom_size);
1082 if (ftyp_atom == NULL) {
1083 return NGX_ERROR;
1084 }
1085
1086 ngx_mp4_set_32value(ftyp_atom, atom_size);
1087 ngx_mp4_set_atom_name(ftyp_atom, 'f', 't', 'y', 'p');
1088
1089 /*
1090 * only moov atom content is guaranteed to be in mp4->buffer
1091 * during sending response, so ftyp atom content should be copied
1092 */
1093 ngx_memcpy(ftyp_atom + sizeof(ngx_mp4_atom_header_t),
1094 ngx_mp4_atom_data(mp4), (size_t) atom_data_size);
1095
1096 atom = &mp4->ftyp_atom_buf;
1097 atom->temporary = 1;
1098 atom->pos = ftyp_atom;
1099 atom->last = ftyp_atom + atom_size;
1100
1101 mp4->ftyp_atom.buf = atom;
1102 mp4->ftyp_size = atom_size;
1103 mp4->content_length = atom_size;
1104
1105 ngx_mp4_atom_next(mp4, atom_data_size);
1106
1107 return NGX_OK;
1108 }
1109
1110
1111 /*
1112 * Small excess buffer to process atoms after moov atom, mp4->buffer_start
1113 * will be set to this buffer part after moov atom processing.
1114 */
1115 #define NGX_HTTP_MP4_MOOV_BUFFER_EXCESS (4 * 1024)
1116
1117 static ngx_int_t
ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1118 ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1119 {
1120 ngx_int_t rc;
1121 ngx_uint_t no_mdat;
1122 ngx_buf_t *atom;
1123 ngx_http_mp4_conf_t *conf;
1124
1125 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom");
1126
1127 no_mdat = (mp4->mdat_atom.buf == NULL);
1128
1129 if (no_mdat && mp4->start == 0 && mp4->length == 0) {
1130 /*
1131 * send original file if moov atom resides before
1132 * mdat atom and client requests integral file
1133 */
1134 return NGX_DECLINED;
1135 }
1136
1137 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
1138
1139 if (atom_data_size > mp4->buffer_size) {
1140
1141 if (atom_data_size > conf->max_buffer_size) {
1142 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1143 "\"%s\" mp4 moov atom is too large:%uL, "
1144 "you may want to increase mp4_max_buffer_size",
1145 mp4->file.name.data, atom_data_size);
1146 return NGX_ERROR;
1147 }
1148
1149 ngx_pfree(mp4->request->pool, mp4->buffer);
1150 mp4->buffer = NULL;
1151 mp4->buffer_pos = NULL;
1152 mp4->buffer_end = NULL;
1153
1154 mp4->buffer_size = (size_t) atom_data_size
1155 + NGX_HTTP_MP4_MOOV_BUFFER_EXCESS * no_mdat;
1156 }
1157
1158 if (ngx_http_mp4_read(mp4, (size_t) atom_data_size) != NGX_OK) {
1159 return NGX_ERROR;
1160 }
1161
1162 mp4->trak.elts = &mp4->traks;
1163 mp4->trak.size = sizeof(ngx_http_mp4_trak_t);
1164 mp4->trak.nalloc = 2;
1165 mp4->trak.pool = mp4->request->pool;
1166
1167 atom = &mp4->moov_atom_buf;
1168 atom->temporary = 1;
1169 atom->pos = mp4->moov_atom_header;
1170 atom->last = mp4->moov_atom_header + 8;
1171
1172 mp4->moov_atom.buf = &mp4->moov_atom_buf;
1173
1174 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_moov_atoms, atom_data_size);
1175
1176 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom done");
1177
1178 if (no_mdat) {
1179 mp4->buffer_start = mp4->buffer_pos;
1180 mp4->buffer_size = NGX_HTTP_MP4_MOOV_BUFFER_EXCESS;
1181
1182 if (mp4->buffer_start + mp4->buffer_size > mp4->buffer_end) {
1183 mp4->buffer = NULL;
1184 mp4->buffer_pos = NULL;
1185 mp4->buffer_end = NULL;
1186 }
1187
1188 } else {
1189 /* skip atoms after moov atom */
1190 mp4->offset = mp4->end;
1191 }
1192
1193 return rc;
1194 }
1195
1196
1197 static ngx_int_t
ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1198 ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1199 {
1200 ngx_buf_t *data;
1201
1202 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom");
1203
1204 data = &mp4->mdat_data_buf;
1205 data->file = &mp4->file;
1206 data->in_file = 1;
1207 data->last_buf = (mp4->request == mp4->request->main) ? 1 : 0;
1208 data->last_in_chain = 1;
1209 data->file_last = mp4->offset + atom_data_size;
1210
1211 mp4->mdat_atom.buf = &mp4->mdat_atom_buf;
1212 mp4->mdat_atom.next = &mp4->mdat_data;
1213 mp4->mdat_data.buf = data;
1214
1215 if (mp4->trak.nelts) {
1216 /* skip atoms after mdat atom */
1217 mp4->offset = mp4->end;
1218
1219 } else {
1220 ngx_mp4_atom_next(mp4, atom_data_size);
1221 }
1222
1223 return NGX_OK;
1224 }
1225
1226
1227 static size_t
ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t * mp4,off_t start_offset,off_t end_offset)1228 ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset,
1229 off_t end_offset)
1230 {
1231 off_t atom_data_size;
1232 u_char *atom_header;
1233 uint32_t atom_header_size;
1234 uint64_t atom_size;
1235 ngx_buf_t *atom;
1236
1237 atom_data_size = end_offset - start_offset;
1238 mp4->mdat_data.buf->file_pos = start_offset;
1239 mp4->mdat_data.buf->file_last = end_offset;
1240
1241 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1242 "mdat new offset @%O:%O", start_offset, atom_data_size);
1243
1244 atom_header = mp4->mdat_atom_header;
1245
1246 if ((uint64_t) atom_data_size
1247 > (uint64_t) 0xffffffff - sizeof(ngx_mp4_atom_header_t))
1248 {
1249 atom_size = 1;
1250 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
1251 ngx_mp4_set_64value(atom_header + sizeof(ngx_mp4_atom_header_t),
1252 sizeof(ngx_mp4_atom_header64_t) + atom_data_size);
1253 } else {
1254 atom_size = sizeof(ngx_mp4_atom_header_t) + atom_data_size;
1255 atom_header_size = sizeof(ngx_mp4_atom_header_t);
1256 }
1257
1258 mp4->content_length += atom_header_size + atom_data_size;
1259
1260 ngx_mp4_set_32value(atom_header, atom_size);
1261 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'a', 't');
1262
1263 atom = &mp4->mdat_atom_buf;
1264 atom->temporary = 1;
1265 atom->pos = atom_header;
1266 atom->last = atom_header + atom_header_size;
1267
1268 return atom_header_size;
1269 }
1270
1271
1272 typedef struct {
1273 u_char size[4];
1274 u_char name[4];
1275 u_char version[1];
1276 u_char flags[3];
1277 u_char creation_time[4];
1278 u_char modification_time[4];
1279 u_char timescale[4];
1280 u_char duration[4];
1281 u_char rate[4];
1282 u_char volume[2];
1283 u_char reserved[10];
1284 u_char matrix[36];
1285 u_char preview_time[4];
1286 u_char preview_duration[4];
1287 u_char poster_time[4];
1288 u_char selection_time[4];
1289 u_char selection_duration[4];
1290 u_char current_time[4];
1291 u_char next_track_id[4];
1292 } ngx_mp4_mvhd_atom_t;
1293
1294 typedef struct {
1295 u_char size[4];
1296 u_char name[4];
1297 u_char version[1];
1298 u_char flags[3];
1299 u_char creation_time[8];
1300 u_char modification_time[8];
1301 u_char timescale[4];
1302 u_char duration[8];
1303 u_char rate[4];
1304 u_char volume[2];
1305 u_char reserved[10];
1306 u_char matrix[36];
1307 u_char preview_time[4];
1308 u_char preview_duration[4];
1309 u_char poster_time[4];
1310 u_char selection_time[4];
1311 u_char selection_duration[4];
1312 u_char current_time[4];
1313 u_char next_track_id[4];
1314 } ngx_mp4_mvhd64_atom_t;
1315
1316
1317 static ngx_int_t
ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1318 ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1319 {
1320 u_char *atom_header;
1321 size_t atom_size;
1322 uint32_t timescale;
1323 uint64_t duration, start_time, length_time;
1324 ngx_buf_t *atom;
1325 ngx_mp4_mvhd_atom_t *mvhd_atom;
1326 ngx_mp4_mvhd64_atom_t *mvhd64_atom;
1327
1328 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom");
1329
1330 atom_header = ngx_mp4_atom_header(mp4);
1331 mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header;
1332 mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header;
1333 ngx_mp4_set_atom_name(atom_header, 'm', 'v', 'h', 'd');
1334
1335 if (ngx_mp4_atom_data_size(ngx_mp4_mvhd_atom_t) > atom_data_size) {
1336 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1337 "\"%s\" mp4 mvhd atom too small", mp4->file.name.data);
1338 return NGX_ERROR;
1339 }
1340
1341 if (mvhd_atom->version[0] == 0) {
1342 /* version 0: 32-bit duration */
1343 timescale = ngx_mp4_get_32value(mvhd_atom->timescale);
1344 duration = ngx_mp4_get_32value(mvhd_atom->duration);
1345
1346 } else {
1347 /* version 1: 64-bit duration */
1348
1349 if (ngx_mp4_atom_data_size(ngx_mp4_mvhd64_atom_t) > atom_data_size) {
1350 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1351 "\"%s\" mp4 mvhd atom too small",
1352 mp4->file.name.data);
1353 return NGX_ERROR;
1354 }
1355
1356 timescale = ngx_mp4_get_32value(mvhd64_atom->timescale);
1357 duration = ngx_mp4_get_64value(mvhd64_atom->duration);
1358 }
1359
1360 mp4->timescale = timescale;
1361
1362 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1363 "mvhd timescale:%uD, duration:%uL, time:%.3fs",
1364 timescale, duration, (double) duration / timescale);
1365
1366 start_time = (uint64_t) mp4->start * timescale / 1000;
1367
1368 if (duration < start_time) {
1369 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1370 "\"%s\" mp4 start time exceeds file duration",
1371 mp4->file.name.data);
1372 return NGX_ERROR;
1373 }
1374
1375 duration -= start_time;
1376
1377 if (mp4->length) {
1378 length_time = (uint64_t) mp4->length * timescale / 1000;
1379
1380 if (duration > length_time) {
1381 duration = length_time;
1382 }
1383 }
1384
1385 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1386 "mvhd new duration:%uL, time:%.3fs",
1387 duration, (double) duration / timescale);
1388
1389 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1390 ngx_mp4_set_32value(mvhd_atom->size, atom_size);
1391
1392 if (mvhd_atom->version[0] == 0) {
1393 ngx_mp4_set_32value(mvhd_atom->duration, duration);
1394
1395 } else {
1396 ngx_mp4_set_64value(mvhd64_atom->duration, duration);
1397 }
1398
1399 atom = &mp4->mvhd_atom_buf;
1400 atom->temporary = 1;
1401 atom->pos = atom_header;
1402 atom->last = atom_header + atom_size;
1403
1404 mp4->mvhd_atom.buf = atom;
1405
1406 ngx_mp4_atom_next(mp4, atom_data_size);
1407
1408 return NGX_OK;
1409 }
1410
1411
1412 static ngx_int_t
ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1413 ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1414 {
1415 u_char *atom_header, *atom_end;
1416 off_t atom_file_end;
1417 ngx_int_t rc;
1418 ngx_buf_t *atom;
1419 ngx_http_mp4_trak_t *trak;
1420
1421 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom");
1422
1423 trak = ngx_array_push(&mp4->trak);
1424 if (trak == NULL) {
1425 return NGX_ERROR;
1426 }
1427
1428 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1429
1430 atom_header = ngx_mp4_atom_header(mp4);
1431 ngx_mp4_set_atom_name(atom_header, 't', 'r', 'a', 'k');
1432
1433 atom = &trak->trak_atom_buf;
1434 atom->temporary = 1;
1435 atom->pos = atom_header;
1436 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1437
1438 trak->out[NGX_HTTP_MP4_TRAK_ATOM].buf = atom;
1439
1440 atom_end = mp4->buffer_pos + (size_t) atom_data_size;
1441 atom_file_end = mp4->offset + atom_data_size;
1442
1443 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_trak_atoms, atom_data_size);
1444
1445 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1446 "mp4 trak atom: %i", rc);
1447
1448 if (rc == NGX_DECLINED) {
1449 /* skip this trak */
1450 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1451 mp4->trak.nelts--;
1452 mp4->buffer_pos = atom_end;
1453 mp4->offset = atom_file_end;
1454 return NGX_OK;
1455 }
1456
1457 return rc;
1458 }
1459
1460
1461 static void
ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1462 ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
1463 ngx_http_mp4_trak_t *trak)
1464 {
1465 ngx_buf_t *atom;
1466
1467 trak->size += sizeof(ngx_mp4_atom_header_t);
1468 atom = &trak->trak_atom_buf;
1469 ngx_mp4_set_32value(atom->pos, trak->size);
1470 }
1471
1472
1473 static ngx_int_t
ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1474 ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1475 {
1476 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1477 "\"%s\" mp4 compressed moov atom (cmov) is not supported",
1478 mp4->file.name.data);
1479
1480 return NGX_ERROR;
1481 }
1482
1483
1484 typedef struct {
1485 u_char size[4];
1486 u_char name[4];
1487 u_char version[1];
1488 u_char flags[3];
1489 u_char creation_time[4];
1490 u_char modification_time[4];
1491 u_char track_id[4];
1492 u_char reserved1[4];
1493 u_char duration[4];
1494 u_char reserved2[8];
1495 u_char layer[2];
1496 u_char group[2];
1497 u_char volume[2];
1498 u_char reserved3[2];
1499 u_char matrix[36];
1500 u_char width[4];
1501 u_char height[4];
1502 } ngx_mp4_tkhd_atom_t;
1503
1504 typedef struct {
1505 u_char size[4];
1506 u_char name[4];
1507 u_char version[1];
1508 u_char flags[3];
1509 u_char creation_time[8];
1510 u_char modification_time[8];
1511 u_char track_id[4];
1512 u_char reserved1[4];
1513 u_char duration[8];
1514 u_char reserved2[8];
1515 u_char layer[2];
1516 u_char group[2];
1517 u_char volume[2];
1518 u_char reserved3[2];
1519 u_char matrix[36];
1520 u_char width[4];
1521 u_char height[4];
1522 } ngx_mp4_tkhd64_atom_t;
1523
1524
1525 static ngx_int_t
ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1526 ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1527 {
1528 u_char *atom_header;
1529 size_t atom_size;
1530 uint64_t duration, start_time, length_time;
1531 ngx_buf_t *atom;
1532 ngx_http_mp4_trak_t *trak;
1533 ngx_mp4_tkhd_atom_t *tkhd_atom;
1534 ngx_mp4_tkhd64_atom_t *tkhd64_atom;
1535
1536 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 tkhd atom");
1537
1538 atom_header = ngx_mp4_atom_header(mp4);
1539 tkhd_atom = (ngx_mp4_tkhd_atom_t *) atom_header;
1540 tkhd64_atom = (ngx_mp4_tkhd64_atom_t *) atom_header;
1541 ngx_mp4_set_atom_name(tkhd_atom, 't', 'k', 'h', 'd');
1542
1543 if (ngx_mp4_atom_data_size(ngx_mp4_tkhd_atom_t) > atom_data_size) {
1544 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1545 "\"%s\" mp4 tkhd atom too small", mp4->file.name.data);
1546 return NGX_ERROR;
1547 }
1548
1549 if (tkhd_atom->version[0] == 0) {
1550 /* version 0: 32-bit duration */
1551 duration = ngx_mp4_get_32value(tkhd_atom->duration);
1552
1553 } else {
1554 /* version 1: 64-bit duration */
1555
1556 if (ngx_mp4_atom_data_size(ngx_mp4_tkhd64_atom_t) > atom_data_size) {
1557 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1558 "\"%s\" mp4 tkhd atom too small",
1559 mp4->file.name.data);
1560 return NGX_ERROR;
1561 }
1562
1563 duration = ngx_mp4_get_64value(tkhd64_atom->duration);
1564 }
1565
1566 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1567 "tkhd duration:%uL, time:%.3fs",
1568 duration, (double) duration / mp4->timescale);
1569
1570 start_time = (uint64_t) mp4->start * mp4->timescale / 1000;
1571
1572 if (duration <= start_time) {
1573 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1574 "tkhd duration is less than start time");
1575 return NGX_DECLINED;
1576 }
1577
1578 duration -= start_time;
1579
1580 if (mp4->length) {
1581 length_time = (uint64_t) mp4->length * mp4->timescale / 1000;
1582
1583 if (duration > length_time) {
1584 duration = length_time;
1585 }
1586 }
1587
1588 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1589 "tkhd new duration:%uL, time:%.3fs",
1590 duration, (double) duration / mp4->timescale);
1591
1592 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1593
1594 trak = ngx_mp4_last_trak(mp4);
1595 trak->tkhd_size = atom_size;
1596
1597 ngx_mp4_set_32value(tkhd_atom->size, atom_size);
1598
1599 if (tkhd_atom->version[0] == 0) {
1600 ngx_mp4_set_32value(tkhd_atom->duration, duration);
1601
1602 } else {
1603 ngx_mp4_set_64value(tkhd64_atom->duration, duration);
1604 }
1605
1606 atom = &trak->tkhd_atom_buf;
1607 atom->temporary = 1;
1608 atom->pos = atom_header;
1609 atom->last = atom_header + atom_size;
1610
1611 trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf = atom;
1612
1613 ngx_mp4_atom_next(mp4, atom_data_size);
1614
1615 return NGX_OK;
1616 }
1617
1618
1619 static ngx_int_t
ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1620 ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1621 {
1622 u_char *atom_header;
1623 ngx_buf_t *atom;
1624 ngx_http_mp4_trak_t *trak;
1625
1626 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process mdia atom");
1627
1628 atom_header = ngx_mp4_atom_header(mp4);
1629 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'i', 'a');
1630
1631 trak = ngx_mp4_last_trak(mp4);
1632
1633 atom = &trak->mdia_atom_buf;
1634 atom->temporary = 1;
1635 atom->pos = atom_header;
1636 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1637
1638 trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf = atom;
1639
1640 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_mdia_atoms, atom_data_size);
1641 }
1642
1643
1644 static void
ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1645 ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
1646 ngx_http_mp4_trak_t *trak)
1647 {
1648 ngx_buf_t *atom;
1649
1650 trak->size += sizeof(ngx_mp4_atom_header_t);
1651 atom = &trak->mdia_atom_buf;
1652 ngx_mp4_set_32value(atom->pos, trak->size);
1653 }
1654
1655
1656 typedef struct {
1657 u_char size[4];
1658 u_char name[4];
1659 u_char version[1];
1660 u_char flags[3];
1661 u_char creation_time[4];
1662 u_char modification_time[4];
1663 u_char timescale[4];
1664 u_char duration[4];
1665 u_char language[2];
1666 u_char quality[2];
1667 } ngx_mp4_mdhd_atom_t;
1668
1669 typedef struct {
1670 u_char size[4];
1671 u_char name[4];
1672 u_char version[1];
1673 u_char flags[3];
1674 u_char creation_time[8];
1675 u_char modification_time[8];
1676 u_char timescale[4];
1677 u_char duration[8];
1678 u_char language[2];
1679 u_char quality[2];
1680 } ngx_mp4_mdhd64_atom_t;
1681
1682
1683 static ngx_int_t
ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1684 ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1685 {
1686 u_char *atom_header;
1687 size_t atom_size;
1688 uint32_t timescale;
1689 uint64_t duration, start_time, length_time;
1690 ngx_buf_t *atom;
1691 ngx_http_mp4_trak_t *trak;
1692 ngx_mp4_mdhd_atom_t *mdhd_atom;
1693 ngx_mp4_mdhd64_atom_t *mdhd64_atom;
1694
1695 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdhd atom");
1696
1697 atom_header = ngx_mp4_atom_header(mp4);
1698 mdhd_atom = (ngx_mp4_mdhd_atom_t *) atom_header;
1699 mdhd64_atom = (ngx_mp4_mdhd64_atom_t *) atom_header;
1700 ngx_mp4_set_atom_name(mdhd_atom, 'm', 'd', 'h', 'd');
1701
1702 if (ngx_mp4_atom_data_size(ngx_mp4_mdhd_atom_t) > atom_data_size) {
1703 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1704 "\"%s\" mp4 mdhd atom too small", mp4->file.name.data);
1705 return NGX_ERROR;
1706 }
1707
1708 if (mdhd_atom->version[0] == 0) {
1709 /* version 0: everything is 32-bit */
1710 timescale = ngx_mp4_get_32value(mdhd_atom->timescale);
1711 duration = ngx_mp4_get_32value(mdhd_atom->duration);
1712
1713 } else {
1714 /* version 1: 64-bit duration and 32-bit timescale */
1715
1716 if (ngx_mp4_atom_data_size(ngx_mp4_mdhd64_atom_t) > atom_data_size) {
1717 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1718 "\"%s\" mp4 mdhd atom too small",
1719 mp4->file.name.data);
1720 return NGX_ERROR;
1721 }
1722
1723 timescale = ngx_mp4_get_32value(mdhd64_atom->timescale);
1724 duration = ngx_mp4_get_64value(mdhd64_atom->duration);
1725 }
1726
1727 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1728 "mdhd timescale:%uD, duration:%uL, time:%.3fs",
1729 timescale, duration, (double) duration / timescale);
1730
1731 start_time = (uint64_t) mp4->start * timescale / 1000;
1732
1733 if (duration <= start_time) {
1734 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1735 "mdhd duration is less than start time");
1736 return NGX_DECLINED;
1737 }
1738
1739 duration -= start_time;
1740
1741 if (mp4->length) {
1742 length_time = (uint64_t) mp4->length * timescale / 1000;
1743
1744 if (duration > length_time) {
1745 duration = length_time;
1746 }
1747 }
1748
1749 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1750 "mdhd new duration:%uL, time:%.3fs",
1751 duration, (double) duration / timescale);
1752
1753 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1754
1755 trak = ngx_mp4_last_trak(mp4);
1756 trak->mdhd_size = atom_size;
1757 trak->timescale = timescale;
1758
1759 ngx_mp4_set_32value(mdhd_atom->size, atom_size);
1760
1761 if (mdhd_atom->version[0] == 0) {
1762 ngx_mp4_set_32value(mdhd_atom->duration, duration);
1763
1764 } else {
1765 ngx_mp4_set_64value(mdhd64_atom->duration, duration);
1766 }
1767
1768 atom = &trak->mdhd_atom_buf;
1769 atom->temporary = 1;
1770 atom->pos = atom_header;
1771 atom->last = atom_header + atom_size;
1772
1773 trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf = atom;
1774
1775 ngx_mp4_atom_next(mp4, atom_data_size);
1776
1777 return NGX_OK;
1778 }
1779
1780
1781 static ngx_int_t
ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1782 ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1783 {
1784 u_char *atom_header;
1785 size_t atom_size;
1786 ngx_buf_t *atom;
1787 ngx_http_mp4_trak_t *trak;
1788
1789 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 hdlr atom");
1790
1791 atom_header = ngx_mp4_atom_header(mp4);
1792 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1793 ngx_mp4_set_32value(atom_header, atom_size);
1794 ngx_mp4_set_atom_name(atom_header, 'h', 'd', 'l', 'r');
1795
1796 trak = ngx_mp4_last_trak(mp4);
1797
1798 atom = &trak->hdlr_atom_buf;
1799 atom->temporary = 1;
1800 atom->pos = atom_header;
1801 atom->last = atom_header + atom_size;
1802
1803 trak->hdlr_size = atom_size;
1804 trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf = atom;
1805
1806 ngx_mp4_atom_next(mp4, atom_data_size);
1807
1808 return NGX_OK;
1809 }
1810
1811
1812 static ngx_int_t
ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1813 ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1814 {
1815 u_char *atom_header;
1816 ngx_buf_t *atom;
1817 ngx_http_mp4_trak_t *trak;
1818
1819 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process minf atom");
1820
1821 atom_header = ngx_mp4_atom_header(mp4);
1822 ngx_mp4_set_atom_name(atom_header, 'm', 'i', 'n', 'f');
1823
1824 trak = ngx_mp4_last_trak(mp4);
1825
1826 atom = &trak->minf_atom_buf;
1827 atom->temporary = 1;
1828 atom->pos = atom_header;
1829 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1830
1831 trak->out[NGX_HTTP_MP4_MINF_ATOM].buf = atom;
1832
1833 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_minf_atoms, atom_data_size);
1834 }
1835
1836
1837 static void
ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1838 ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
1839 ngx_http_mp4_trak_t *trak)
1840 {
1841 ngx_buf_t *atom;
1842
1843 trak->size += sizeof(ngx_mp4_atom_header_t)
1844 + trak->vmhd_size
1845 + trak->smhd_size
1846 + trak->dinf_size;
1847 atom = &trak->minf_atom_buf;
1848 ngx_mp4_set_32value(atom->pos, trak->size);
1849 }
1850
1851
1852 static ngx_int_t
ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1853 ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1854 {
1855 u_char *atom_header;
1856 size_t atom_size;
1857 ngx_buf_t *atom;
1858 ngx_http_mp4_trak_t *trak;
1859
1860 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 vmhd atom");
1861
1862 atom_header = ngx_mp4_atom_header(mp4);
1863 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1864 ngx_mp4_set_32value(atom_header, atom_size);
1865 ngx_mp4_set_atom_name(atom_header, 'v', 'm', 'h', 'd');
1866
1867 trak = ngx_mp4_last_trak(mp4);
1868
1869 atom = &trak->vmhd_atom_buf;
1870 atom->temporary = 1;
1871 atom->pos = atom_header;
1872 atom->last = atom_header + atom_size;
1873
1874 trak->vmhd_size += atom_size;
1875 trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf = atom;
1876
1877 ngx_mp4_atom_next(mp4, atom_data_size);
1878
1879 return NGX_OK;
1880 }
1881
1882
1883 static ngx_int_t
ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1884 ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1885 {
1886 u_char *atom_header;
1887 size_t atom_size;
1888 ngx_buf_t *atom;
1889 ngx_http_mp4_trak_t *trak;
1890
1891 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 smhd atom");
1892
1893 atom_header = ngx_mp4_atom_header(mp4);
1894 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1895 ngx_mp4_set_32value(atom_header, atom_size);
1896 ngx_mp4_set_atom_name(atom_header, 's', 'm', 'h', 'd');
1897
1898 trak = ngx_mp4_last_trak(mp4);
1899
1900 atom = &trak->smhd_atom_buf;
1901 atom->temporary = 1;
1902 atom->pos = atom_header;
1903 atom->last = atom_header + atom_size;
1904
1905 trak->smhd_size += atom_size;
1906 trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf = atom;
1907
1908 ngx_mp4_atom_next(mp4, atom_data_size);
1909
1910 return NGX_OK;
1911 }
1912
1913
1914 static ngx_int_t
ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1915 ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1916 {
1917 u_char *atom_header;
1918 size_t atom_size;
1919 ngx_buf_t *atom;
1920 ngx_http_mp4_trak_t *trak;
1921
1922 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 dinf atom");
1923
1924 atom_header = ngx_mp4_atom_header(mp4);
1925 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1926 ngx_mp4_set_32value(atom_header, atom_size);
1927 ngx_mp4_set_atom_name(atom_header, 'd', 'i', 'n', 'f');
1928
1929 trak = ngx_mp4_last_trak(mp4);
1930
1931 atom = &trak->dinf_atom_buf;
1932 atom->temporary = 1;
1933 atom->pos = atom_header;
1934 atom->last = atom_header + atom_size;
1935
1936 trak->dinf_size += atom_size;
1937 trak->out[NGX_HTTP_MP4_DINF_ATOM].buf = atom;
1938
1939 ngx_mp4_atom_next(mp4, atom_data_size);
1940
1941 return NGX_OK;
1942 }
1943
1944
1945 static ngx_int_t
ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1946 ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1947 {
1948 u_char *atom_header;
1949 ngx_buf_t *atom;
1950 ngx_http_mp4_trak_t *trak;
1951
1952 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process stbl atom");
1953
1954 atom_header = ngx_mp4_atom_header(mp4);
1955 ngx_mp4_set_atom_name(atom_header, 's', 't', 'b', 'l');
1956
1957 trak = ngx_mp4_last_trak(mp4);
1958
1959 atom = &trak->stbl_atom_buf;
1960 atom->temporary = 1;
1961 atom->pos = atom_header;
1962 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1963
1964 trak->out[NGX_HTTP_MP4_STBL_ATOM].buf = atom;
1965
1966 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_stbl_atoms, atom_data_size);
1967 }
1968
1969
1970 static void
ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1971 ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
1972 ngx_http_mp4_trak_t *trak)
1973 {
1974 ngx_buf_t *atom;
1975
1976 trak->size += sizeof(ngx_mp4_atom_header_t);
1977 atom = &trak->stbl_atom_buf;
1978 ngx_mp4_set_32value(atom->pos, trak->size);
1979 }
1980
1981
1982 typedef struct {
1983 u_char size[4];
1984 u_char name[4];
1985 u_char version[1];
1986 u_char flags[3];
1987 u_char entries[4];
1988
1989 u_char media_size[4];
1990 u_char media_name[4];
1991 } ngx_mp4_stsd_atom_t;
1992
1993
1994 static ngx_int_t
ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1995 ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1996 {
1997 u_char *atom_header, *atom_table;
1998 size_t atom_size;
1999 ngx_buf_t *atom;
2000 ngx_mp4_stsd_atom_t *stsd_atom;
2001 ngx_http_mp4_trak_t *trak;
2002
2003 /* sample description atom */
2004
2005 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsd atom");
2006
2007 atom_header = ngx_mp4_atom_header(mp4);
2008 stsd_atom = (ngx_mp4_stsd_atom_t *) atom_header;
2009 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
2010 atom_table = atom_header + atom_size;
2011 ngx_mp4_set_32value(stsd_atom->size, atom_size);
2012 ngx_mp4_set_atom_name(stsd_atom, 's', 't', 's', 'd');
2013
2014 if (ngx_mp4_atom_data_size(ngx_mp4_stsd_atom_t) > atom_data_size) {
2015 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2016 "\"%s\" mp4 stsd atom too small", mp4->file.name.data);
2017 return NGX_ERROR;
2018 }
2019
2020 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2021 "stsd entries:%uD, media:%*s",
2022 ngx_mp4_get_32value(stsd_atom->entries),
2023 (size_t) 4, stsd_atom->media_name);
2024
2025 trak = ngx_mp4_last_trak(mp4);
2026
2027 atom = &trak->stsd_atom_buf;
2028 atom->temporary = 1;
2029 atom->pos = atom_header;
2030 atom->last = atom_table;
2031
2032 trak->out[NGX_HTTP_MP4_STSD_ATOM].buf = atom;
2033 trak->size += atom_size;
2034
2035 ngx_mp4_atom_next(mp4, atom_data_size);
2036
2037 return NGX_OK;
2038 }
2039
2040
2041 typedef struct {
2042 u_char size[4];
2043 u_char name[4];
2044 u_char version[1];
2045 u_char flags[3];
2046 u_char entries[4];
2047 } ngx_mp4_stts_atom_t;
2048
2049 typedef struct {
2050 u_char count[4];
2051 u_char duration[4];
2052 } ngx_mp4_stts_entry_t;
2053
2054
2055 static ngx_int_t
ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2056 ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2057 {
2058 u_char *atom_header, *atom_table, *atom_end;
2059 uint32_t entries;
2060 ngx_buf_t *atom, *data;
2061 ngx_mp4_stts_atom_t *stts_atom;
2062 ngx_http_mp4_trak_t *trak;
2063
2064 /* time-to-sample atom */
2065
2066 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom");
2067
2068 atom_header = ngx_mp4_atom_header(mp4);
2069 stts_atom = (ngx_mp4_stts_atom_t *) atom_header;
2070 ngx_mp4_set_atom_name(stts_atom, 's', 't', 't', 's');
2071
2072 if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t) > atom_data_size) {
2073 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2074 "\"%s\" mp4 stts atom too small", mp4->file.name.data);
2075 return NGX_ERROR;
2076 }
2077
2078 entries = ngx_mp4_get_32value(stts_atom->entries);
2079
2080 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2081 "mp4 time-to-sample entries:%uD", entries);
2082
2083 if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t)
2084 + entries * sizeof(ngx_mp4_stts_entry_t) > atom_data_size)
2085 {
2086 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2087 "\"%s\" mp4 stts atom too small", mp4->file.name.data);
2088 return NGX_ERROR;
2089 }
2090
2091 atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t);
2092 atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
2093
2094 trak = ngx_mp4_last_trak(mp4);
2095 trak->time_to_sample_entries = entries;
2096
2097 atom = &trak->stts_atom_buf;
2098 atom->temporary = 1;
2099 atom->pos = atom_header;
2100 atom->last = atom_table;
2101
2102 data = &trak->stts_data_buf;
2103 data->temporary = 1;
2104 data->pos = atom_table;
2105 data->last = atom_end;
2106
2107 trak->out[NGX_HTTP_MP4_STTS_ATOM].buf = atom;
2108 trak->out[NGX_HTTP_MP4_STTS_DATA].buf = data;
2109
2110 ngx_mp4_atom_next(mp4, atom_data_size);
2111
2112 return NGX_OK;
2113 }
2114
2115
2116 static ngx_int_t
ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2117 ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
2118 ngx_http_mp4_trak_t *trak)
2119 {
2120 size_t atom_size;
2121 ngx_buf_t *atom, *data;
2122 ngx_mp4_stts_atom_t *stts_atom;
2123
2124 /*
2125 * mdia.minf.stbl.stts updating requires trak->timescale
2126 * from mdia.mdhd atom which may reside after mdia.minf
2127 */
2128
2129 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2130 "mp4 stts atom update");
2131
2132 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
2133
2134 if (data == NULL) {
2135 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2136 "no mp4 stts atoms were found in \"%s\"",
2137 mp4->file.name.data);
2138 return NGX_ERROR;
2139 }
2140
2141 if (ngx_http_mp4_crop_stts_data(mp4, trak, 1) != NGX_OK) {
2142 return NGX_ERROR;
2143 }
2144
2145 if (ngx_http_mp4_crop_stts_data(mp4, trak, 0) != NGX_OK) {
2146 return NGX_ERROR;
2147 }
2148
2149 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2150 "time-to-sample entries:%uD", trak->time_to_sample_entries);
2151
2152 atom_size = sizeof(ngx_mp4_stts_atom_t) + (data->last - data->pos);
2153 trak->size += atom_size;
2154
2155 atom = trak->out[NGX_HTTP_MP4_STTS_ATOM].buf;
2156 stts_atom = (ngx_mp4_stts_atom_t *) atom->pos;
2157 ngx_mp4_set_32value(stts_atom->size, atom_size);
2158 ngx_mp4_set_32value(stts_atom->entries, trak->time_to_sample_entries);
2159
2160 return NGX_OK;
2161 }
2162
2163
2164 static ngx_int_t
ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2165 ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t *mp4,
2166 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2167 {
2168 uint32_t count, duration, rest;
2169 uint64_t start_time;
2170 ngx_buf_t *data;
2171 ngx_uint_t start_sample, entries, start_sec;
2172 ngx_mp4_stts_entry_t *entry, *end;
2173
2174 if (start) {
2175 start_sec = mp4->start;
2176
2177 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2178 "mp4 stts crop start_time:%ui", start_sec);
2179
2180 } else if (mp4->length) {
2181 start_sec = mp4->length;
2182
2183 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2184 "mp4 stts crop end_time:%ui", start_sec);
2185
2186 } else {
2187 return NGX_OK;
2188 }
2189
2190 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
2191
2192 start_time = (uint64_t) start_sec * trak->timescale / 1000;
2193
2194 entries = trak->time_to_sample_entries;
2195 start_sample = 0;
2196 entry = (ngx_mp4_stts_entry_t *) data->pos;
2197 end = (ngx_mp4_stts_entry_t *) data->last;
2198
2199 while (entry < end) {
2200 count = ngx_mp4_get_32value(entry->count);
2201 duration = ngx_mp4_get_32value(entry->duration);
2202
2203 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2204 "time:%uL, count:%uD, duration:%uD",
2205 start_time, count, duration);
2206
2207 if (start_time < (uint64_t) count * duration) {
2208 start_sample += (ngx_uint_t) (start_time / duration);
2209 rest = (uint32_t) (start_time / duration);
2210 goto found;
2211 }
2212
2213 start_sample += count;
2214 start_time -= count * duration;
2215 entries--;
2216 entry++;
2217 }
2218
2219 if (start) {
2220 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2221 "start time is out mp4 stts samples in \"%s\"",
2222 mp4->file.name.data);
2223
2224 return NGX_ERROR;
2225
2226 } else {
2227 trak->end_sample = trak->start_sample + start_sample;
2228
2229 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2230 "end_sample:%ui", trak->end_sample);
2231
2232 return NGX_OK;
2233 }
2234
2235 found:
2236
2237 if (start) {
2238 ngx_mp4_set_32value(entry->count, count - rest);
2239 data->pos = (u_char *) entry;
2240 trak->time_to_sample_entries = entries;
2241 trak->start_sample = start_sample;
2242
2243 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2244 "start_sample:%ui, new count:%uD",
2245 trak->start_sample, count - rest);
2246
2247 } else {
2248 ngx_mp4_set_32value(entry->count, rest);
2249 data->last = (u_char *) (entry + 1);
2250 trak->time_to_sample_entries -= entries - 1;
2251 trak->end_sample = trak->start_sample + start_sample;
2252
2253 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2254 "end_sample:%ui, new count:%uD",
2255 trak->end_sample, rest);
2256 }
2257
2258 return NGX_OK;
2259 }
2260
2261
2262 typedef struct {
2263 u_char size[4];
2264 u_char name[4];
2265 u_char version[1];
2266 u_char flags[3];
2267 u_char entries[4];
2268 } ngx_http_mp4_stss_atom_t;
2269
2270
2271 static ngx_int_t
ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2272 ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2273 {
2274 u_char *atom_header, *atom_table, *atom_end;
2275 uint32_t entries;
2276 ngx_buf_t *atom, *data;
2277 ngx_http_mp4_trak_t *trak;
2278 ngx_http_mp4_stss_atom_t *stss_atom;
2279
2280 /* sync samples atom */
2281
2282 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom");
2283
2284 atom_header = ngx_mp4_atom_header(mp4);
2285 stss_atom = (ngx_http_mp4_stss_atom_t *) atom_header;
2286 ngx_mp4_set_atom_name(stss_atom, 's', 't', 's', 's');
2287
2288 if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t) > atom_data_size) {
2289 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2290 "\"%s\" mp4 stss atom too small", mp4->file.name.data);
2291 return NGX_ERROR;
2292 }
2293
2294 entries = ngx_mp4_get_32value(stss_atom->entries);
2295
2296 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2297 "sync sample entries:%uD", entries);
2298
2299 trak = ngx_mp4_last_trak(mp4);
2300 trak->sync_samples_entries = entries;
2301
2302 atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t);
2303
2304 atom = &trak->stss_atom_buf;
2305 atom->temporary = 1;
2306 atom->pos = atom_header;
2307 atom->last = atom_table;
2308
2309 if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t)
2310 + entries * sizeof(uint32_t) > atom_data_size)
2311 {
2312 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2313 "\"%s\" mp4 stss atom too small", mp4->file.name.data);
2314 return NGX_ERROR;
2315 }
2316
2317 atom_end = atom_table + entries * sizeof(uint32_t);
2318
2319 data = &trak->stss_data_buf;
2320 data->temporary = 1;
2321 data->pos = atom_table;
2322 data->last = atom_end;
2323
2324 trak->out[NGX_HTTP_MP4_STSS_ATOM].buf = atom;
2325 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = data;
2326
2327 ngx_mp4_atom_next(mp4, atom_data_size);
2328
2329 return NGX_OK;
2330 }
2331
2332
2333 static ngx_int_t
ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2334 ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
2335 ngx_http_mp4_trak_t *trak)
2336 {
2337 size_t atom_size;
2338 uint32_t sample, start_sample, *entry, *end;
2339 ngx_buf_t *atom, *data;
2340 ngx_http_mp4_stss_atom_t *stss_atom;
2341
2342 /*
2343 * mdia.minf.stbl.stss updating requires trak->start_sample
2344 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2345 * atom which may reside after mdia.minf
2346 */
2347
2348 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2349 "mp4 stss atom update");
2350
2351 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
2352
2353 if (data == NULL) {
2354 return NGX_OK;
2355 }
2356
2357 ngx_http_mp4_crop_stss_data(mp4, trak, 1);
2358 ngx_http_mp4_crop_stss_data(mp4, trak, 0);
2359
2360 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2361 "sync sample entries:%uD", trak->sync_samples_entries);
2362
2363 if (trak->sync_samples_entries) {
2364 entry = (uint32_t *) data->pos;
2365 end = (uint32_t *) data->last;
2366
2367 start_sample = trak->start_sample;
2368
2369 while (entry < end) {
2370 sample = ngx_mp4_get_32value(entry);
2371 sample -= start_sample;
2372 ngx_mp4_set_32value(entry, sample);
2373 entry++;
2374 }
2375
2376 } else {
2377 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = NULL;
2378 }
2379
2380 atom_size = sizeof(ngx_http_mp4_stss_atom_t) + (data->last - data->pos);
2381 trak->size += atom_size;
2382
2383 atom = trak->out[NGX_HTTP_MP4_STSS_ATOM].buf;
2384 stss_atom = (ngx_http_mp4_stss_atom_t *) atom->pos;
2385
2386 ngx_mp4_set_32value(stss_atom->size, atom_size);
2387 ngx_mp4_set_32value(stss_atom->entries, trak->sync_samples_entries);
2388
2389 return NGX_OK;
2390 }
2391
2392
2393 static void
ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2394 ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t *mp4,
2395 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2396 {
2397 uint32_t sample, start_sample, *entry, *end;
2398 ngx_buf_t *data;
2399 ngx_uint_t entries;
2400
2401 /* sync samples starts from 1 */
2402
2403 if (start) {
2404 start_sample = trak->start_sample + 1;
2405
2406 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2407 "mp4 stss crop start_sample:%uD", start_sample);
2408
2409 } else if (mp4->length) {
2410 start_sample = trak->end_sample + 1;
2411
2412 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2413 "mp4 stss crop end_sample:%uD", start_sample);
2414
2415 } else {
2416 return;
2417 }
2418
2419 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
2420
2421 entries = trak->sync_samples_entries;
2422 entry = (uint32_t *) data->pos;
2423 end = (uint32_t *) data->last;
2424
2425 while (entry < end) {
2426 sample = ngx_mp4_get_32value(entry);
2427
2428 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2429 "sync:%uD", sample);
2430
2431 if (sample >= start_sample) {
2432 goto found;
2433 }
2434
2435 entries--;
2436 entry++;
2437 }
2438
2439 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2440 "sample is out of mp4 stss atom");
2441
2442 found:
2443
2444 if (start) {
2445 data->pos = (u_char *) entry;
2446 trak->sync_samples_entries = entries;
2447
2448 } else {
2449 data->last = (u_char *) entry;
2450 trak->sync_samples_entries -= entries;
2451 }
2452 }
2453
2454
2455 typedef struct {
2456 u_char size[4];
2457 u_char name[4];
2458 u_char version[1];
2459 u_char flags[3];
2460 u_char entries[4];
2461 } ngx_mp4_ctts_atom_t;
2462
2463 typedef struct {
2464 u_char count[4];
2465 u_char offset[4];
2466 } ngx_mp4_ctts_entry_t;
2467
2468
2469 static ngx_int_t
ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2470 ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2471 {
2472 u_char *atom_header, *atom_table, *atom_end;
2473 uint32_t entries;
2474 ngx_buf_t *atom, *data;
2475 ngx_mp4_ctts_atom_t *ctts_atom;
2476 ngx_http_mp4_trak_t *trak;
2477
2478 /* composition offsets atom */
2479
2480 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom");
2481
2482 atom_header = ngx_mp4_atom_header(mp4);
2483 ctts_atom = (ngx_mp4_ctts_atom_t *) atom_header;
2484 ngx_mp4_set_atom_name(ctts_atom, 'c', 't', 't', 's');
2485
2486 if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t) > atom_data_size) {
2487 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2488 "\"%s\" mp4 ctts atom too small", mp4->file.name.data);
2489 return NGX_ERROR;
2490 }
2491
2492 entries = ngx_mp4_get_32value(ctts_atom->entries);
2493
2494 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2495 "composition offset entries:%uD", entries);
2496
2497 trak = ngx_mp4_last_trak(mp4);
2498 trak->composition_offset_entries = entries;
2499
2500 atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t);
2501
2502 atom = &trak->ctts_atom_buf;
2503 atom->temporary = 1;
2504 atom->pos = atom_header;
2505 atom->last = atom_table;
2506
2507 if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t)
2508 + entries * sizeof(ngx_mp4_ctts_entry_t) > atom_data_size)
2509 {
2510 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2511 "\"%s\" mp4 ctts atom too small", mp4->file.name.data);
2512 return NGX_ERROR;
2513 }
2514
2515 atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t);
2516
2517 data = &trak->ctts_data_buf;
2518 data->temporary = 1;
2519 data->pos = atom_table;
2520 data->last = atom_end;
2521
2522 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = atom;
2523 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = data;
2524
2525 ngx_mp4_atom_next(mp4, atom_data_size);
2526
2527 return NGX_OK;
2528 }
2529
2530
2531 static void
ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2532 ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
2533 ngx_http_mp4_trak_t *trak)
2534 {
2535 size_t atom_size;
2536 ngx_buf_t *atom, *data;
2537 ngx_mp4_ctts_atom_t *ctts_atom;
2538
2539 /*
2540 * mdia.minf.stbl.ctts updating requires trak->start_sample
2541 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2542 * atom which may reside after mdia.minf
2543 */
2544
2545 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2546 "mp4 ctts atom update");
2547
2548 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2549
2550 if (data == NULL) {
2551 return;
2552 }
2553
2554 ngx_http_mp4_crop_ctts_data(mp4, trak, 1);
2555 ngx_http_mp4_crop_ctts_data(mp4, trak, 0);
2556
2557 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2558 "composition offset entries:%uD",
2559 trak->composition_offset_entries);
2560
2561 if (trak->composition_offset_entries == 0) {
2562 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL;
2563 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL;
2564 return;
2565 }
2566
2567 atom_size = sizeof(ngx_mp4_ctts_atom_t) + (data->last - data->pos);
2568 trak->size += atom_size;
2569
2570 atom = trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf;
2571 ctts_atom = (ngx_mp4_ctts_atom_t *) atom->pos;
2572
2573 ngx_mp4_set_32value(ctts_atom->size, atom_size);
2574 ngx_mp4_set_32value(ctts_atom->entries, trak->composition_offset_entries);
2575
2576 return;
2577 }
2578
2579
2580 static void
ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2581 ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t *mp4,
2582 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2583 {
2584 uint32_t count, start_sample, rest;
2585 ngx_buf_t *data;
2586 ngx_uint_t entries;
2587 ngx_mp4_ctts_entry_t *entry, *end;
2588
2589 /* sync samples starts from 1 */
2590
2591 if (start) {
2592 start_sample = trak->start_sample + 1;
2593
2594 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2595 "mp4 ctts crop start_sample:%uD", start_sample);
2596
2597 } else if (mp4->length) {
2598 start_sample = trak->end_sample - trak->start_sample + 1;
2599
2600 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2601 "mp4 ctts crop end_sample:%uD", start_sample);
2602
2603 } else {
2604 return;
2605 }
2606
2607 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2608
2609 entries = trak->composition_offset_entries;
2610 entry = (ngx_mp4_ctts_entry_t *) data->pos;
2611 end = (ngx_mp4_ctts_entry_t *) data->last;
2612
2613 while (entry < end) {
2614 count = ngx_mp4_get_32value(entry->count);
2615
2616 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2617 "sample:%uD, count:%uD, offset:%uD",
2618 start_sample, count, ngx_mp4_get_32value(entry->offset));
2619
2620 if (start_sample <= count) {
2621 rest = start_sample - 1;
2622 goto found;
2623 }
2624
2625 start_sample -= count;
2626 entries--;
2627 entry++;
2628 }
2629
2630 if (start) {
2631 data->pos = (u_char *) end;
2632 trak->composition_offset_entries = 0;
2633 }
2634
2635 return;
2636
2637 found:
2638
2639 if (start) {
2640 ngx_mp4_set_32value(entry->count, count - rest);
2641 data->pos = (u_char *) entry;
2642 trak->composition_offset_entries = entries;
2643
2644 } else {
2645 ngx_mp4_set_32value(entry->count, rest);
2646 data->last = (u_char *) (entry + 1);
2647 trak->composition_offset_entries -= entries - 1;
2648 }
2649 }
2650
2651
2652 typedef struct {
2653 u_char size[4];
2654 u_char name[4];
2655 u_char version[1];
2656 u_char flags[3];
2657 u_char entries[4];
2658 } ngx_mp4_stsc_atom_t;
2659
2660
2661 static ngx_int_t
ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2662 ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2663 {
2664 u_char *atom_header, *atom_table, *atom_end;
2665 uint32_t entries;
2666 ngx_buf_t *atom, *data;
2667 ngx_mp4_stsc_atom_t *stsc_atom;
2668 ngx_http_mp4_trak_t *trak;
2669
2670 /* sample-to-chunk atom */
2671
2672 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom");
2673
2674 atom_header = ngx_mp4_atom_header(mp4);
2675 stsc_atom = (ngx_mp4_stsc_atom_t *) atom_header;
2676 ngx_mp4_set_atom_name(stsc_atom, 's', 't', 's', 'c');
2677
2678 if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t) > atom_data_size) {
2679 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2680 "\"%s\" mp4 stsc atom too small", mp4->file.name.data);
2681 return NGX_ERROR;
2682 }
2683
2684 entries = ngx_mp4_get_32value(stsc_atom->entries);
2685
2686 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2687 "sample-to-chunk entries:%uD", entries);
2688
2689 if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t)
2690 + entries * sizeof(ngx_mp4_stsc_entry_t) > atom_data_size)
2691 {
2692 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2693 "\"%s\" mp4 stsc atom too small", mp4->file.name.data);
2694 return NGX_ERROR;
2695 }
2696
2697 atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t);
2698 atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
2699
2700 trak = ngx_mp4_last_trak(mp4);
2701 trak->sample_to_chunk_entries = entries;
2702
2703 atom = &trak->stsc_atom_buf;
2704 atom->temporary = 1;
2705 atom->pos = atom_header;
2706 atom->last = atom_table;
2707
2708 data = &trak->stsc_data_buf;
2709 data->temporary = 1;
2710 data->pos = atom_table;
2711 data->last = atom_end;
2712
2713 trak->out[NGX_HTTP_MP4_STSC_ATOM].buf = atom;
2714 trak->out[NGX_HTTP_MP4_STSC_DATA].buf = data;
2715
2716 ngx_mp4_atom_next(mp4, atom_data_size);
2717
2718 return NGX_OK;
2719 }
2720
2721
2722 static ngx_int_t
ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2723 ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
2724 ngx_http_mp4_trak_t *trak)
2725 {
2726 size_t atom_size;
2727 uint32_t chunk;
2728 ngx_buf_t *atom, *data;
2729 ngx_mp4_stsc_atom_t *stsc_atom;
2730 ngx_mp4_stsc_entry_t *entry, *end;
2731
2732 /*
2733 * mdia.minf.stbl.stsc updating requires trak->start_sample
2734 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2735 * atom which may reside after mdia.minf
2736 */
2737
2738 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2739 "mp4 stsc atom update");
2740
2741 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2742
2743 if (data == NULL) {
2744 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2745 "no mp4 stsc atoms were found in \"%s\"",
2746 mp4->file.name.data);
2747 return NGX_ERROR;
2748 }
2749
2750 if (trak->sample_to_chunk_entries == 0) {
2751 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2752 "zero number of entries in stsc atom in \"%s\"",
2753 mp4->file.name.data);
2754 return NGX_ERROR;
2755 }
2756
2757 if (ngx_http_mp4_crop_stsc_data(mp4, trak, 1) != NGX_OK) {
2758 return NGX_ERROR;
2759 }
2760
2761 if (ngx_http_mp4_crop_stsc_data(mp4, trak, 0) != NGX_OK) {
2762 return NGX_ERROR;
2763 }
2764
2765 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2766 "sample-to-chunk entries:%uD",
2767 trak->sample_to_chunk_entries);
2768
2769 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2770 end = (ngx_mp4_stsc_entry_t *) data->last;
2771
2772 while (entry < end) {
2773 chunk = ngx_mp4_get_32value(entry->chunk);
2774 chunk -= trak->start_chunk;
2775 ngx_mp4_set_32value(entry->chunk, chunk);
2776 entry++;
2777 }
2778
2779 atom_size = sizeof(ngx_mp4_stsc_atom_t)
2780 + trak->sample_to_chunk_entries * sizeof(ngx_mp4_stsc_entry_t);
2781
2782 trak->size += atom_size;
2783
2784 atom = trak->out[NGX_HTTP_MP4_STSC_ATOM].buf;
2785 stsc_atom = (ngx_mp4_stsc_atom_t *) atom->pos;
2786
2787 ngx_mp4_set_32value(stsc_atom->size, atom_size);
2788 ngx_mp4_set_32value(stsc_atom->entries, trak->sample_to_chunk_entries);
2789
2790 return NGX_OK;
2791 }
2792
2793
2794 static ngx_int_t
ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2795 ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t *mp4,
2796 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2797 {
2798 uint32_t start_sample, chunk, samples, id, next_chunk, n,
2799 prev_samples;
2800 ngx_buf_t *data, *buf;
2801 ngx_uint_t entries, target_chunk, chunk_samples;
2802 ngx_mp4_stsc_entry_t *entry, *end, *first;
2803
2804 entries = trak->sample_to_chunk_entries - 1;
2805
2806 if (start) {
2807 start_sample = (uint32_t) trak->start_sample;
2808
2809 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2810 "mp4 stsc crop start_sample:%uD", start_sample);
2811
2812 } else if (mp4->length) {
2813 start_sample = (uint32_t) (trak->end_sample - trak->start_sample);
2814 samples = 0;
2815
2816 data = trak->out[NGX_HTTP_MP4_STSC_START].buf;
2817
2818 if (data) {
2819 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2820 samples = ngx_mp4_get_32value(entry->samples);
2821 entries--;
2822
2823 if (samples > start_sample) {
2824 samples = start_sample;
2825 ngx_mp4_set_32value(entry->samples, samples);
2826 }
2827
2828 start_sample -= samples;
2829 }
2830
2831 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2832 "mp4 stsc crop end_sample:%uD, ext_samples:%uD",
2833 start_sample, samples);
2834
2835 } else {
2836 return NGX_OK;
2837 }
2838
2839 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2840
2841 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2842 end = (ngx_mp4_stsc_entry_t *) data->last;
2843
2844 chunk = ngx_mp4_get_32value(entry->chunk);
2845 samples = ngx_mp4_get_32value(entry->samples);
2846 id = ngx_mp4_get_32value(entry->id);
2847 prev_samples = 0;
2848 entry++;
2849
2850 while (entry < end) {
2851
2852 next_chunk = ngx_mp4_get_32value(entry->chunk);
2853
2854 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2855 "sample:%uD, chunk:%uD, chunks:%uD, "
2856 "samples:%uD, id:%uD",
2857 start_sample, chunk, next_chunk - chunk, samples, id);
2858
2859 n = (next_chunk - chunk) * samples;
2860
2861 if (start_sample < n) {
2862 goto found;
2863 }
2864
2865 start_sample -= n;
2866
2867 prev_samples = samples;
2868 chunk = next_chunk;
2869 samples = ngx_mp4_get_32value(entry->samples);
2870 id = ngx_mp4_get_32value(entry->id);
2871 entries--;
2872 entry++;
2873 }
2874
2875 next_chunk = trak->chunks + 1;
2876
2877 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2878 "sample:%uD, chunk:%uD, chunks:%uD, samples:%uD",
2879 start_sample, chunk, next_chunk - chunk, samples);
2880
2881 n = (next_chunk - chunk) * samples;
2882
2883 if (start_sample > n) {
2884 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2885 "%s time is out mp4 stsc chunks in \"%s\"",
2886 start ? "start" : "end", mp4->file.name.data);
2887 return NGX_ERROR;
2888 }
2889
2890 found:
2891
2892 entries++;
2893 entry--;
2894
2895 if (samples == 0) {
2896 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2897 "zero number of samples in \"%s\"",
2898 mp4->file.name.data);
2899 return NGX_ERROR;
2900 }
2901
2902 target_chunk = chunk - 1;
2903 target_chunk += start_sample / samples;
2904 chunk_samples = start_sample % samples;
2905
2906 if (start) {
2907 data->pos = (u_char *) entry;
2908
2909 trak->sample_to_chunk_entries = entries;
2910 trak->start_chunk = target_chunk;
2911 trak->start_chunk_samples = chunk_samples;
2912
2913 ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 1);
2914
2915 samples -= chunk_samples;
2916
2917 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2918 "start_chunk:%ui, start_chunk_samples:%ui",
2919 trak->start_chunk, trak->start_chunk_samples);
2920
2921 } else {
2922 if (start_sample) {
2923 data->last = (u_char *) (entry + 1);
2924 trak->sample_to_chunk_entries -= entries - 1;
2925 trak->end_chunk_samples = samples;
2926
2927 } else {
2928 data->last = (u_char *) entry;
2929 trak->sample_to_chunk_entries -= entries;
2930 trak->end_chunk_samples = prev_samples;
2931 }
2932
2933 if (chunk_samples) {
2934 trak->end_chunk = target_chunk + 1;
2935 trak->end_chunk_samples = chunk_samples;
2936
2937 } else {
2938 trak->end_chunk = target_chunk;
2939 }
2940
2941 samples = chunk_samples;
2942 next_chunk = chunk + 1;
2943
2944 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2945 "end_chunk:%ui, end_chunk_samples:%ui",
2946 trak->end_chunk, trak->end_chunk_samples);
2947 }
2948
2949 if (chunk_samples && next_chunk - target_chunk == 2) {
2950
2951 ngx_mp4_set_32value(entry->samples, samples);
2952
2953 } else if (chunk_samples && start) {
2954
2955 first = &trak->stsc_start_chunk_entry;
2956 ngx_mp4_set_32value(first->chunk, 1);
2957 ngx_mp4_set_32value(first->samples, samples);
2958 ngx_mp4_set_32value(first->id, id);
2959
2960 buf = &trak->stsc_start_chunk_buf;
2961 buf->temporary = 1;
2962 buf->pos = (u_char *) first;
2963 buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t);
2964
2965 trak->out[NGX_HTTP_MP4_STSC_START].buf = buf;
2966
2967 ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 2);
2968
2969 trak->sample_to_chunk_entries++;
2970
2971 } else if (chunk_samples) {
2972
2973 first = &trak->stsc_end_chunk_entry;
2974 ngx_mp4_set_32value(first->chunk, trak->end_chunk - trak->start_chunk);
2975 ngx_mp4_set_32value(first->samples, samples);
2976 ngx_mp4_set_32value(first->id, id);
2977
2978 buf = &trak->stsc_end_chunk_buf;
2979 buf->temporary = 1;
2980 buf->pos = (u_char *) first;
2981 buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t);
2982
2983 trak->out[NGX_HTTP_MP4_STSC_END].buf = buf;
2984
2985 trak->sample_to_chunk_entries++;
2986 }
2987
2988 return NGX_OK;
2989 }
2990
2991
2992 typedef struct {
2993 u_char size[4];
2994 u_char name[4];
2995 u_char version[1];
2996 u_char flags[3];
2997 u_char uniform_size[4];
2998 u_char entries[4];
2999 } ngx_mp4_stsz_atom_t;
3000
3001
3002 static ngx_int_t
ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)3003 ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
3004 {
3005 u_char *atom_header, *atom_table, *atom_end;
3006 size_t atom_size;
3007 uint32_t entries, size;
3008 ngx_buf_t *atom, *data;
3009 ngx_mp4_stsz_atom_t *stsz_atom;
3010 ngx_http_mp4_trak_t *trak;
3011
3012 /* sample sizes atom */
3013
3014 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom");
3015
3016 atom_header = ngx_mp4_atom_header(mp4);
3017 stsz_atom = (ngx_mp4_stsz_atom_t *) atom_header;
3018 ngx_mp4_set_atom_name(stsz_atom, 's', 't', 's', 'z');
3019
3020 if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t) > atom_data_size) {
3021 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3022 "\"%s\" mp4 stsz atom too small", mp4->file.name.data);
3023 return NGX_ERROR;
3024 }
3025
3026 size = ngx_mp4_get_32value(stsz_atom->uniform_size);
3027 entries = ngx_mp4_get_32value(stsz_atom->entries);
3028
3029 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3030 "sample uniform size:%uD, entries:%uD", size, entries);
3031
3032 trak = ngx_mp4_last_trak(mp4);
3033 trak->sample_sizes_entries = entries;
3034
3035 atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t);
3036
3037 atom = &trak->stsz_atom_buf;
3038 atom->temporary = 1;
3039 atom->pos = atom_header;
3040 atom->last = atom_table;
3041
3042 trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf = atom;
3043
3044 if (size == 0) {
3045 if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t)
3046 + entries * sizeof(uint32_t) > atom_data_size)
3047 {
3048 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3049 "\"%s\" mp4 stsz atom too small",
3050 mp4->file.name.data);
3051 return NGX_ERROR;
3052 }
3053
3054 atom_end = atom_table + entries * sizeof(uint32_t);
3055
3056 data = &trak->stsz_data_buf;
3057 data->temporary = 1;
3058 data->pos = atom_table;
3059 data->last = atom_end;
3060
3061 trak->out[NGX_HTTP_MP4_STSZ_DATA].buf = data;
3062
3063 } else {
3064 /* if size != 0 then all samples are the same size */
3065 /* TODO : chunk samples */
3066 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
3067 ngx_mp4_set_32value(atom_header, atom_size);
3068 trak->size += atom_size;
3069 }
3070
3071 ngx_mp4_atom_next(mp4, atom_data_size);
3072
3073 return NGX_OK;
3074 }
3075
3076
3077 static ngx_int_t
ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3078 ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
3079 ngx_http_mp4_trak_t *trak)
3080 {
3081 size_t atom_size;
3082 uint32_t *pos, *end, entries;
3083 ngx_buf_t *atom, *data;
3084 ngx_mp4_stsz_atom_t *stsz_atom;
3085
3086 /*
3087 * mdia.minf.stbl.stsz updating requires trak->start_sample
3088 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
3089 * atom which may reside after mdia.minf
3090 */
3091
3092 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3093 "mp4 stsz atom update");
3094
3095 data = trak->out[NGX_HTTP_MP4_STSZ_DATA].buf;
3096
3097 if (data) {
3098 entries = trak->sample_sizes_entries;
3099
3100 if (trak->start_sample > entries) {
3101 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3102 "start time is out mp4 stsz samples in \"%s\"",
3103 mp4->file.name.data);
3104 return NGX_ERROR;
3105 }
3106
3107 entries -= trak->start_sample;
3108 data->pos += trak->start_sample * sizeof(uint32_t);
3109 end = (uint32_t *) data->pos;
3110
3111 for (pos = end - trak->start_chunk_samples; pos < end; pos++) {
3112 trak->start_chunk_samples_size += ngx_mp4_get_32value(pos);
3113 }
3114
3115 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3116 "chunk samples sizes:%uL",
3117 trak->start_chunk_samples_size);
3118
3119 if (mp4->length) {
3120 if (trak->end_sample - trak->start_sample > entries) {
3121 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3122 "end time is out mp4 stsz samples in \"%s\"",
3123 mp4->file.name.data);
3124 return NGX_ERROR;
3125 }
3126
3127 entries = trak->end_sample - trak->start_sample;
3128 data->last = data->pos + entries * sizeof(uint32_t);
3129 end = (uint32_t *) data->last;
3130
3131 for (pos = end - trak->end_chunk_samples; pos < end; pos++) {
3132 trak->end_chunk_samples_size += ngx_mp4_get_32value(pos);
3133 }
3134
3135 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3136 "mp4 stsz end_chunk_samples_size:%uL",
3137 trak->end_chunk_samples_size);
3138 }
3139
3140 atom_size = sizeof(ngx_mp4_stsz_atom_t) + (data->last - data->pos);
3141 trak->size += atom_size;
3142
3143 atom = trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf;
3144 stsz_atom = (ngx_mp4_stsz_atom_t *) atom->pos;
3145
3146 ngx_mp4_set_32value(stsz_atom->size, atom_size);
3147 ngx_mp4_set_32value(stsz_atom->entries, entries);
3148 }
3149
3150 return NGX_OK;
3151 }
3152
3153
3154 typedef struct {
3155 u_char size[4];
3156 u_char name[4];
3157 u_char version[1];
3158 u_char flags[3];
3159 u_char entries[4];
3160 } ngx_mp4_stco_atom_t;
3161
3162
3163 static ngx_int_t
ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)3164 ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
3165 {
3166 u_char *atom_header, *atom_table, *atom_end;
3167 uint32_t entries;
3168 ngx_buf_t *atom, *data;
3169 ngx_mp4_stco_atom_t *stco_atom;
3170 ngx_http_mp4_trak_t *trak;
3171
3172 /* chunk offsets atom */
3173
3174 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom");
3175
3176 atom_header = ngx_mp4_atom_header(mp4);
3177 stco_atom = (ngx_mp4_stco_atom_t *) atom_header;
3178 ngx_mp4_set_atom_name(stco_atom, 's', 't', 'c', 'o');
3179
3180 if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t) > atom_data_size) {
3181 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3182 "\"%s\" mp4 stco atom too small", mp4->file.name.data);
3183 return NGX_ERROR;
3184 }
3185
3186 entries = ngx_mp4_get_32value(stco_atom->entries);
3187
3188 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
3189
3190 if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t)
3191 + entries * sizeof(uint32_t) > atom_data_size)
3192 {
3193 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3194 "\"%s\" mp4 stco atom too small", mp4->file.name.data);
3195 return NGX_ERROR;
3196 }
3197
3198 atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t);
3199 atom_end = atom_table + entries * sizeof(uint32_t);
3200
3201 trak = ngx_mp4_last_trak(mp4);
3202 trak->chunks = entries;
3203
3204 atom = &trak->stco_atom_buf;
3205 atom->temporary = 1;
3206 atom->pos = atom_header;
3207 atom->last = atom_table;
3208
3209 data = &trak->stco_data_buf;
3210 data->temporary = 1;
3211 data->pos = atom_table;
3212 data->last = atom_end;
3213
3214 trak->out[NGX_HTTP_MP4_STCO_ATOM].buf = atom;
3215 trak->out[NGX_HTTP_MP4_STCO_DATA].buf = data;
3216
3217 ngx_mp4_atom_next(mp4, atom_data_size);
3218
3219 return NGX_OK;
3220 }
3221
3222
3223 static ngx_int_t
ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3224 ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
3225 ngx_http_mp4_trak_t *trak)
3226 {
3227 size_t atom_size;
3228 uint32_t entries;
3229 ngx_buf_t *atom, *data;
3230 ngx_mp4_stco_atom_t *stco_atom;
3231
3232 /*
3233 * mdia.minf.stbl.stco updating requires trak->start_chunk
3234 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
3235 * atom which may reside after mdia.minf
3236 */
3237
3238 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3239 "mp4 stco atom update");
3240
3241 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
3242
3243 if (data == NULL) {
3244 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3245 "no mp4 stco atoms were found in \"%s\"",
3246 mp4->file.name.data);
3247 return NGX_ERROR;
3248 }
3249
3250 if (trak->start_chunk > trak->chunks) {
3251 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3252 "start time is out mp4 stco chunks in \"%s\"",
3253 mp4->file.name.data);
3254 return NGX_ERROR;
3255 }
3256
3257 data->pos += trak->start_chunk * sizeof(uint32_t);
3258
3259 trak->start_offset = ngx_mp4_get_32value(data->pos);
3260 trak->start_offset += trak->start_chunk_samples_size;
3261 ngx_mp4_set_32value(data->pos, trak->start_offset);
3262
3263 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3264 "start chunk offset:%O", trak->start_offset);
3265
3266 if (mp4->length) {
3267
3268 if (trak->end_chunk > trak->chunks) {
3269 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3270 "end time is out mp4 stco chunks in \"%s\"",
3271 mp4->file.name.data);
3272 return NGX_ERROR;
3273 }
3274
3275 entries = trak->end_chunk - trak->start_chunk;
3276 data->last = data->pos + entries * sizeof(uint32_t);
3277
3278 if (entries) {
3279 trak->end_offset =
3280 ngx_mp4_get_32value(data->last - sizeof(uint32_t));
3281 trak->end_offset += trak->end_chunk_samples_size;
3282
3283 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3284 "end chunk offset:%O", trak->end_offset);
3285 }
3286
3287 } else {
3288 entries = trak->chunks - trak->start_chunk;
3289 trak->end_offset = mp4->mdat_data.buf->file_last;
3290 }
3291
3292 if (entries == 0) {
3293 trak->start_offset = mp4->end;
3294 trak->end_offset = 0;
3295 }
3296
3297 atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos);
3298 trak->size += atom_size;
3299
3300 atom = trak->out[NGX_HTTP_MP4_STCO_ATOM].buf;
3301 stco_atom = (ngx_mp4_stco_atom_t *) atom->pos;
3302
3303 ngx_mp4_set_32value(stco_atom->size, atom_size);
3304 ngx_mp4_set_32value(stco_atom->entries, entries);
3305
3306 return NGX_OK;
3307 }
3308
3309
3310 static void
ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,int32_t adjustment)3311 ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
3312 ngx_http_mp4_trak_t *trak, int32_t adjustment)
3313 {
3314 uint32_t offset, *entry, *end;
3315 ngx_buf_t *data;
3316
3317 /*
3318 * moov.trak.mdia.minf.stbl.stco adjustment requires
3319 * minimal start offset of all traks and new moov atom size
3320 */
3321
3322 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3323 "mp4 stco atom adjustment");
3324
3325 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
3326 entry = (uint32_t *) data->pos;
3327 end = (uint32_t *) data->last;
3328
3329 while (entry < end) {
3330 offset = ngx_mp4_get_32value(entry);
3331 offset += adjustment;
3332 ngx_mp4_set_32value(entry, offset);
3333 entry++;
3334 }
3335 }
3336
3337
3338 typedef struct {
3339 u_char size[4];
3340 u_char name[4];
3341 u_char version[1];
3342 u_char flags[3];
3343 u_char entries[4];
3344 } ngx_mp4_co64_atom_t;
3345
3346
3347 static ngx_int_t
ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)3348 ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
3349 {
3350 u_char *atom_header, *atom_table, *atom_end;
3351 uint32_t entries;
3352 ngx_buf_t *atom, *data;
3353 ngx_mp4_co64_atom_t *co64_atom;
3354 ngx_http_mp4_trak_t *trak;
3355
3356 /* chunk offsets atom */
3357
3358 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom");
3359
3360 atom_header = ngx_mp4_atom_header(mp4);
3361 co64_atom = (ngx_mp4_co64_atom_t *) atom_header;
3362 ngx_mp4_set_atom_name(co64_atom, 'c', 'o', '6', '4');
3363
3364 if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t) > atom_data_size) {
3365 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3366 "\"%s\" mp4 co64 atom too small", mp4->file.name.data);
3367 return NGX_ERROR;
3368 }
3369
3370 entries = ngx_mp4_get_32value(co64_atom->entries);
3371
3372 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
3373
3374 if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t)
3375 + entries * sizeof(uint64_t) > atom_data_size)
3376 {
3377 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3378 "\"%s\" mp4 co64 atom too small", mp4->file.name.data);
3379 return NGX_ERROR;
3380 }
3381
3382 atom_table = atom_header + sizeof(ngx_mp4_co64_atom_t);
3383 atom_end = atom_table + entries * sizeof(uint64_t);
3384
3385 trak = ngx_mp4_last_trak(mp4);
3386 trak->chunks = entries;
3387
3388 atom = &trak->co64_atom_buf;
3389 atom->temporary = 1;
3390 atom->pos = atom_header;
3391 atom->last = atom_table;
3392
3393 data = &trak->co64_data_buf;
3394 data->temporary = 1;
3395 data->pos = atom_table;
3396 data->last = atom_end;
3397
3398 trak->out[NGX_HTTP_MP4_CO64_ATOM].buf = atom;
3399 trak->out[NGX_HTTP_MP4_CO64_DATA].buf = data;
3400
3401 ngx_mp4_atom_next(mp4, atom_data_size);
3402
3403 return NGX_OK;
3404 }
3405
3406
3407 static ngx_int_t
ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3408 ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4,
3409 ngx_http_mp4_trak_t *trak)
3410 {
3411 size_t atom_size;
3412 uint64_t entries;
3413 ngx_buf_t *atom, *data;
3414 ngx_mp4_co64_atom_t *co64_atom;
3415
3416 /*
3417 * mdia.minf.stbl.co64 updating requires trak->start_chunk
3418 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
3419 * atom which may reside after mdia.minf
3420 */
3421
3422 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3423 "mp4 co64 atom update");
3424
3425 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
3426
3427 if (data == NULL) {
3428 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3429 "no mp4 co64 atoms were found in \"%s\"",
3430 mp4->file.name.data);
3431 return NGX_ERROR;
3432 }
3433
3434 if (trak->start_chunk > trak->chunks) {
3435 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3436 "start time is out mp4 co64 chunks in \"%s\"",
3437 mp4->file.name.data);
3438 return NGX_ERROR;
3439 }
3440
3441 data->pos += trak->start_chunk * sizeof(uint64_t);
3442
3443 trak->start_offset = ngx_mp4_get_64value(data->pos);
3444 trak->start_offset += trak->start_chunk_samples_size;
3445 ngx_mp4_set_64value(data->pos, trak->start_offset);
3446
3447 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3448 "start chunk offset:%O", trak->start_offset);
3449
3450 if (mp4->length) {
3451
3452 if (trak->end_chunk > trak->chunks) {
3453 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3454 "end time is out mp4 co64 chunks in \"%s\"",
3455 mp4->file.name.data);
3456 return NGX_ERROR;
3457 }
3458
3459 entries = trak->end_chunk - trak->start_chunk;
3460 data->last = data->pos + entries * sizeof(uint64_t);
3461
3462 if (entries) {
3463 trak->end_offset =
3464 ngx_mp4_get_64value(data->last - sizeof(uint64_t));
3465 trak->end_offset += trak->end_chunk_samples_size;
3466
3467 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3468 "end chunk offset:%O", trak->end_offset);
3469 }
3470
3471 } else {
3472 entries = trak->chunks - trak->start_chunk;
3473 trak->end_offset = mp4->mdat_data.buf->file_last;
3474 }
3475
3476 if (entries == 0) {
3477 trak->start_offset = mp4->end;
3478 trak->end_offset = 0;
3479 }
3480
3481 atom_size = sizeof(ngx_mp4_co64_atom_t) + (data->last - data->pos);
3482 trak->size += atom_size;
3483
3484 atom = trak->out[NGX_HTTP_MP4_CO64_ATOM].buf;
3485 co64_atom = (ngx_mp4_co64_atom_t *) atom->pos;
3486
3487 ngx_mp4_set_32value(co64_atom->size, atom_size);
3488 ngx_mp4_set_32value(co64_atom->entries, entries);
3489
3490 return NGX_OK;
3491 }
3492
3493
3494 static void
ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,off_t adjustment)3495 ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4,
3496 ngx_http_mp4_trak_t *trak, off_t adjustment)
3497 {
3498 uint64_t offset, *entry, *end;
3499 ngx_buf_t *data;
3500
3501 /*
3502 * moov.trak.mdia.minf.stbl.co64 adjustment requires
3503 * minimal start offset of all traks and new moov atom size
3504 */
3505
3506 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3507 "mp4 co64 atom adjustment");
3508
3509 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
3510 entry = (uint64_t *) data->pos;
3511 end = (uint64_t *) data->last;
3512
3513 while (entry < end) {
3514 offset = ngx_mp4_get_64value(entry);
3515 offset += adjustment;
3516 ngx_mp4_set_64value(entry, offset);
3517 entry++;
3518 }
3519 }
3520
3521
3522 static char *
ngx_http_mp4(ngx_conf_t * cf,ngx_command_t * cmd,void * conf)3523 ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
3524 {
3525 ngx_http_core_loc_conf_t *clcf;
3526
3527 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
3528 clcf->handler = ngx_http_mp4_handler;
3529
3530 return NGX_CONF_OK;
3531 }
3532
3533
3534 static void *
ngx_http_mp4_create_conf(ngx_conf_t * cf)3535 ngx_http_mp4_create_conf(ngx_conf_t *cf)
3536 {
3537 ngx_http_mp4_conf_t *conf;
3538
3539 conf = ngx_palloc(cf->pool, sizeof(ngx_http_mp4_conf_t));
3540 if (conf == NULL) {
3541 return NULL;
3542 }
3543
3544 conf->buffer_size = NGX_CONF_UNSET_SIZE;
3545 conf->max_buffer_size = NGX_CONF_UNSET_SIZE;
3546
3547 return conf;
3548 }
3549
3550
3551 static char *
ngx_http_mp4_merge_conf(ngx_conf_t * cf,void * parent,void * child)3552 ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child)
3553 {
3554 ngx_http_mp4_conf_t *prev = parent;
3555 ngx_http_mp4_conf_t *conf = child;
3556
3557 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, 512 * 1024);
3558 ngx_conf_merge_size_value(conf->max_buffer_size, prev->max_buffer_size,
3559 10 * 1024 * 1024);
3560
3561 return NGX_CONF_OK;
3562 }
3563