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comparison src/http/modules/ngx_http_mp4_module.c @ 634:0d6525917227 NGINX_1_0_7

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nginx 1.0.7 *) Change: now if total size of all ranges is greater than source response size, then nginx disables ranges and returns just the source response. *) Feature: the "max_ranges" directive. *) Feature: the module ngx_http_mp4_module. *) Feature: the "worker_aio_requests" directive. *) Bugfix: if nginx was built --with-file-aio it could not be run on Linux kernel which did not support AIO. *) Bugfix: in Linux AIO error processing. Thanks to Hagai Avrahami. *) Bugfix: in Linux AIO combined with open_file_cache. *) Bugfix: open_file_cache did not update file info on retest if file was not atomically changed. *) Bugfix: reduced memory consumption for long-lived requests. *) Bugfix: in the "proxy/fastcgi/scgi/uwsgi_ignore_client_abort" directives. *) Bugfix: nginx could not be built on MacOSX 10.7. *) Bugfix: in the "proxy/fastcgi/scgi/uwsgi_ignore_client_abort" directives. *) Bugfix: request body might be processed incorrectly if client used pipelining. *) Bugfix: in the "request_body_in_single_buf" directive. *) Bugfix: in "proxy_set_body" and "proxy_pass_request_body" directives if SSL connection to backend was used. *) Bugfix: nginx hogged CPU if all servers in an upstream were marked as "down". *) Bugfix: a segmentation fault might occur during reconfiguration if ssl_session_cache was defined but not used in previous configuration. *) Bugfix: a segmentation fault might occur in a worker process if many backup servers were used in an upstream.
author Igor Sysoev <http://sysoev.ru>
date Fri, 30 Sep 2011 00:00:00 +0400
parents
children 41147ba87bd9
comparison
equal deleted inserted replaced
633:7c3c34755d2e 634:0d6525917227
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6 #include <ngx_config.h>
7 #include <ngx_core.h>
8 #include <ngx_http.h>
9
10
11 #define NGX_HTTP_MP4_TRAK_ATOM 0
12 #define NGX_HTTP_MP4_TKHD_ATOM 1
13 #define NGX_HTTP_MP4_MDIA_ATOM 2
14 #define NGX_HTTP_MP4_MDHD_ATOM 3
15 #define NGX_HTTP_MP4_HDLR_ATOM 4
16 #define NGX_HTTP_MP4_MINF_ATOM 5
17 #define NGX_HTTP_MP4_VMHD_ATOM 6
18 #define NGX_HTTP_MP4_SMHD_ATOM 7
19 #define NGX_HTTP_MP4_DINF_ATOM 8
20 #define NGX_HTTP_MP4_STBL_ATOM 9
21 #define NGX_HTTP_MP4_STSD_ATOM 10
22 #define NGX_HTTP_MP4_STTS_ATOM 11
23 #define NGX_HTTP_MP4_STTS_DATA 12
24 #define NGX_HTTP_MP4_STSS_ATOM 13
25 #define NGX_HTTP_MP4_STSS_DATA 14
26 #define NGX_HTTP_MP4_CTTS_ATOM 15
27 #define NGX_HTTP_MP4_CTTS_DATA 16
28 #define NGX_HTTP_MP4_STSC_ATOM 17
29 #define NGX_HTTP_MP4_STSC_CHUNK 18
30 #define NGX_HTTP_MP4_STSC_DATA 19
31 #define NGX_HTTP_MP4_STSZ_ATOM 20
32 #define NGX_HTTP_MP4_STSZ_DATA 21
33 #define NGX_HTTP_MP4_STCO_ATOM 22
34 #define NGX_HTTP_MP4_STCO_DATA 23
35 #define NGX_HTTP_MP4_CO64_ATOM 24
36 #define NGX_HTTP_MP4_CO64_DATA 25
37
38 #define NGX_HTTP_MP4_LAST_ATOM NGX_HTTP_MP4_CO64_DATA
39
40
41 typedef struct {
42 size_t buffer_size;
43 size_t max_buffer_size;
44 } ngx_http_mp4_conf_t;
45
46
47 typedef struct {
48 u_char chunk[4];
49 u_char samples[4];
50 u_char id[4];
51 } ngx_mp4_stsc_entry_t;
52
53
54 typedef struct {
55 uint32_t timescale;
56 uint32_t time_to_sample_entries;
57 uint32_t sample_to_chunk_entries;
58 uint32_t sync_samples_entries;
59 uint32_t composition_offset_entries;
60 uint32_t sample_sizes_entries;
61 uint32_t chunks;
62
63 ngx_uint_t start_sample;
64 ngx_uint_t start_chunk;
65 ngx_uint_t chunk_samples;
66 uint64_t chunk_samples_size;
67 off_t start_offset;
68
69 size_t tkhd_size;
70 size_t mdhd_size;
71 size_t hdlr_size;
72 size_t vmhd_size;
73 size_t smhd_size;
74 size_t dinf_size;
75 size_t size;
76
77 ngx_chain_t out[NGX_HTTP_MP4_LAST_ATOM + 1];
78
79 ngx_buf_t trak_atom_buf;
80 ngx_buf_t tkhd_atom_buf;
81 ngx_buf_t mdia_atom_buf;
82 ngx_buf_t mdhd_atom_buf;
83 ngx_buf_t hdlr_atom_buf;
84 ngx_buf_t minf_atom_buf;
85 ngx_buf_t vmhd_atom_buf;
86 ngx_buf_t smhd_atom_buf;
87 ngx_buf_t dinf_atom_buf;
88 ngx_buf_t stbl_atom_buf;
89 ngx_buf_t stsd_atom_buf;
90 ngx_buf_t stts_atom_buf;
91 ngx_buf_t stts_data_buf;
92 ngx_buf_t stss_atom_buf;
93 ngx_buf_t stss_data_buf;
94 ngx_buf_t ctts_atom_buf;
95 ngx_buf_t ctts_data_buf;
96 ngx_buf_t stsc_atom_buf;
97 ngx_buf_t stsc_chunk_buf;
98 ngx_buf_t stsc_data_buf;
99 ngx_buf_t stsz_atom_buf;
100 ngx_buf_t stsz_data_buf;
101 ngx_buf_t stco_atom_buf;
102 ngx_buf_t stco_data_buf;
103 ngx_buf_t co64_atom_buf;
104 ngx_buf_t co64_data_buf;
105
106 ngx_mp4_stsc_entry_t stsc_chunk_entry;
107 } ngx_http_mp4_trak_t;
108
109
110 typedef struct {
111 ngx_file_t file;
112
113 u_char *buffer;
114 u_char *buffer_start;
115 u_char *buffer_pos;
116 u_char *buffer_end;
117 size_t buffer_size;
118
119 off_t offset;
120 off_t end;
121 off_t content_length;
122 ngx_uint_t start;
123 uint32_t timescale;
124 ngx_http_request_t *request;
125 ngx_array_t trak;
126 ngx_http_mp4_trak_t traks[2];
127
128 size_t ftyp_size;
129 size_t moov_size;
130
131 ngx_chain_t *out;
132 ngx_chain_t ftyp_atom;
133 ngx_chain_t moov_atom;
134 ngx_chain_t mvhd_atom;
135 ngx_chain_t mdat_atom;
136 ngx_chain_t mdat_data;
137
138 ngx_buf_t ftyp_atom_buf;
139 ngx_buf_t moov_atom_buf;
140 ngx_buf_t mvhd_atom_buf;
141 ngx_buf_t mdat_atom_buf;
142 ngx_buf_t mdat_data_buf;
143
144 u_char moov_atom_header[8];
145 u_char mdat_atom_header[16];
146 } ngx_http_mp4_file_t;
147
148
149 typedef struct {
150 char *name;
151 ngx_int_t (*handler)(ngx_http_mp4_file_t *mp4,
152 uint64_t atom_data_size);
153 } ngx_http_mp4_atom_handler_t;
154
155
156 #define ngx_mp4_atom_header(mp4) (mp4->buffer_pos - 8)
157 #define ngx_mp4_atom_data(mp4) mp4->buffer_pos
158 #define ngx_mp4_atom_next(mp4, n) mp4->buffer_pos += n; mp4->offset += n
159
160
161 #define ngx_mp4_set_atom_name(p, n1, n2, n3, n4) \
162 ((u_char *) (p))[4] = n1; \
163 ((u_char *) (p))[5] = n2; \
164 ((u_char *) (p))[6] = n3; \
165 ((u_char *) (p))[7] = n4
166
167 #define ngx_mp4_get_32value(p) \
168 ( (((u_char *) (p))[0] << 24) \
169 + (((u_char *) (p))[1] << 16) \
170 + (((u_char *) (p))[2] << 8) \
171 + (((u_char *) (p))[3]) )
172
173 #define ngx_mp4_set_32value(p, n) \
174 ((u_char *) (p))[0] = (u_char) ((n) >> 24); \
175 ((u_char *) (p))[1] = (u_char) ((n) >> 16); \
176 ((u_char *) (p))[2] = (u_char) ((n) >> 8); \
177 ((u_char *) (p))[3] = (u_char) (n)
178
179 #define ngx_mp4_get_64value(p) \
180 ( ((uint64_t) ((u_char *) (p))[0] << 56) \
181 + ((uint64_t) ((u_char *) (p))[1] << 48) \
182 + ((uint64_t) ((u_char *) (p))[2] << 40) \
183 + ((uint64_t) ((u_char *) (p))[3] << 32) \
184 + ((uint64_t) ((u_char *) (p))[4] << 24) \
185 + ( ((u_char *) (p))[5] << 16) \
186 + ( ((u_char *) (p))[6] << 8) \
187 + ( ((u_char *) (p))[7]) )
188
189 #define ngx_mp4_set_64value(p, n) \
190 ((u_char *) (p))[0] = (u_char) ((uint64_t) (n) >> 56); \
191 ((u_char *) (p))[1] = (u_char) ((uint64_t) (n) >> 48); \
192 ((u_char *) (p))[2] = (u_char) ((uint64_t) (n) >> 40); \
193 ((u_char *) (p))[3] = (u_char) ((uint64_t) (n) >> 32); \
194 ((u_char *) (p))[4] = (u_char) ( (n) >> 24); \
195 ((u_char *) (p))[5] = (u_char) ( (n) >> 16); \
196 ((u_char *) (p))[6] = (u_char) ( (n) >> 8); \
197 ((u_char *) (p))[7] = (u_char) (n)
198
199 #define ngx_mp4_last_trak(mp4) \
200 &((ngx_http_mp4_trak_t *) mp4->trak.elts)[mp4->trak.nelts - 1]
201
202
203 static ngx_int_t ngx_http_mp4_process(ngx_http_mp4_file_t *mp4);
204 static ngx_int_t ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
205 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size);
206 static ngx_int_t ngx_http_mp4_read(ngx_http_mp4_file_t *mp4);
207 static ngx_int_t ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4,
208 uint64_t atom_data_size);
209 static ngx_int_t ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4,
210 uint64_t atom_data_size);
211 static ngx_int_t ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4,
212 uint64_t atom_data_size);
213 static size_t ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4,
214 off_t start_offset);
215 static ngx_int_t ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4,
216 uint64_t atom_data_size);
217 static ngx_int_t ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4,
218 uint64_t atom_data_size);
219 static void ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
220 ngx_http_mp4_trak_t *trak);
221 static ngx_int_t ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4,
222 uint64_t atom_data_size);
223 static ngx_int_t ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4,
224 uint64_t atom_data_size);
225 static ngx_int_t ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4,
226 uint64_t atom_data_size);
227 static void ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
228 ngx_http_mp4_trak_t *trak);
229 static ngx_int_t ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4,
230 uint64_t atom_data_size);
231 static ngx_int_t ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4,
232 uint64_t atom_data_size);
233 static ngx_int_t ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4,
234 uint64_t atom_data_size);
235 static void ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
236 ngx_http_mp4_trak_t *trak);
237 static ngx_int_t ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4,
238 uint64_t atom_data_size);
239 static ngx_int_t ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4,
240 uint64_t atom_data_size);
241 static ngx_int_t ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4,
242 uint64_t atom_data_size);
243 static ngx_int_t ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4,
244 uint64_t atom_data_size);
245 static void ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
246 ngx_http_mp4_trak_t *trak);
247 static ngx_int_t ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4,
248 uint64_t atom_data_size);
249 static ngx_int_t ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4,
250 uint64_t atom_data_size);
251 static ngx_int_t ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
252 ngx_http_mp4_trak_t *trak);
253 static ngx_int_t ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4,
254 uint64_t atom_data_size);
255 static ngx_int_t ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
256 ngx_http_mp4_trak_t *trak);
257 static ngx_int_t ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4,
258 uint64_t atom_data_size);
259 static void ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
260 ngx_http_mp4_trak_t *trak);
261 static ngx_int_t ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4,
262 uint64_t atom_data_size);
263 static ngx_int_t ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
264 ngx_http_mp4_trak_t *trak);
265 static ngx_int_t ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4,
266 uint64_t atom_data_size);
267 static void ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
268 ngx_http_mp4_trak_t *trak);
269 static ngx_int_t ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4,
270 uint64_t atom_data_size);
271 static ngx_int_t ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
272 ngx_http_mp4_trak_t *trak);
273 static void ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
274 ngx_http_mp4_trak_t *trak, int32_t adjustment);
275 static ngx_int_t ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4,
276 uint64_t atom_data_size);
277 static ngx_int_t ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4,
278 ngx_http_mp4_trak_t *trak);
279 static void ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4,
280 ngx_http_mp4_trak_t *trak, off_t adjustment);
281 static char *ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
282 static void *ngx_http_mp4_create_conf(ngx_conf_t *cf);
283 static char *ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child);
284
285 static ngx_command_t ngx_http_mp4_commands[] = {
286
287 { ngx_string("mp4"),
288 NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
289 ngx_http_mp4,
290 0,
291 0,
292 NULL },
293
294 { ngx_string("mp4_buffer_size"),
295 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
296 ngx_conf_set_size_slot,
297 NGX_HTTP_LOC_CONF_OFFSET,
298 offsetof(ngx_http_mp4_conf_t, buffer_size),
299 NULL },
300
301 { ngx_string("mp4_max_buffer_size"),
302 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
303 ngx_conf_set_size_slot,
304 NGX_HTTP_LOC_CONF_OFFSET,
305 offsetof(ngx_http_mp4_conf_t, max_buffer_size),
306 NULL },
307
308 ngx_null_command
309 };
310
311
312 static ngx_http_module_t ngx_http_mp4_module_ctx = {
313 NULL, /* preconfiguration */
314 NULL, /* postconfiguration */
315
316 NULL, /* create main configuration */
317 NULL, /* init main configuration */
318
319 NULL, /* create server configuration */
320 NULL, /* merge server configuration */
321
322 ngx_http_mp4_create_conf, /* create location configuration */
323 ngx_http_mp4_merge_conf /* merge location configuration */
324 };
325
326
327 ngx_module_t ngx_http_mp4_module = {
328 NGX_MODULE_V1,
329 &ngx_http_mp4_module_ctx, /* module context */
330 ngx_http_mp4_commands, /* module directives */
331 NGX_HTTP_MODULE, /* module type */
332 NULL, /* init master */
333 NULL, /* init module */
334 NULL, /* init process */
335 NULL, /* init thread */
336 NULL, /* exit thread */
337 NULL, /* exit process */
338 NULL, /* exit master */
339 NGX_MODULE_V1_PADDING
340 };
341
342
343 static ngx_http_mp4_atom_handler_t ngx_http_mp4_atoms[] = {
344 { "ftyp", ngx_http_mp4_read_ftyp_atom },
345 { "moov", ngx_http_mp4_read_moov_atom },
346 { "mdat", ngx_http_mp4_read_mdat_atom },
347 { NULL, NULL }
348 };
349
350 static ngx_http_mp4_atom_handler_t ngx_http_mp4_moov_atoms[] = {
351 { "mvhd", ngx_http_mp4_read_mvhd_atom },
352 { "trak", ngx_http_mp4_read_trak_atom },
353 { "cmov", ngx_http_mp4_read_cmov_atom },
354 { NULL, NULL }
355 };
356
357 static ngx_http_mp4_atom_handler_t ngx_http_mp4_trak_atoms[] = {
358 { "tkhd", ngx_http_mp4_read_tkhd_atom },
359 { "mdia", ngx_http_mp4_read_mdia_atom },
360 { NULL, NULL }
361 };
362
363 static ngx_http_mp4_atom_handler_t ngx_http_mp4_mdia_atoms[] = {
364 { "mdhd", ngx_http_mp4_read_mdhd_atom },
365 { "hdlr", ngx_http_mp4_read_hdlr_atom },
366 { "minf", ngx_http_mp4_read_minf_atom },
367 { NULL, NULL }
368 };
369
370 static ngx_http_mp4_atom_handler_t ngx_http_mp4_minf_atoms[] = {
371 { "vmhd", ngx_http_mp4_read_vmhd_atom },
372 { "smhd", ngx_http_mp4_read_smhd_atom },
373 { "dinf", ngx_http_mp4_read_dinf_atom },
374 { "stbl", ngx_http_mp4_read_stbl_atom },
375 { NULL, NULL }
376 };
377
378 static ngx_http_mp4_atom_handler_t ngx_http_mp4_stbl_atoms[] = {
379 { "stsd", ngx_http_mp4_read_stsd_atom },
380 { "stts", ngx_http_mp4_read_stts_atom },
381 { "stss", ngx_http_mp4_read_stss_atom },
382 { "ctts", ngx_http_mp4_read_ctts_atom },
383 { "stsc", ngx_http_mp4_read_stsc_atom },
384 { "stsz", ngx_http_mp4_read_stsz_atom },
385 { "stco", ngx_http_mp4_read_stco_atom },
386 { "co64", ngx_http_mp4_read_co64_atom },
387 { NULL, NULL }
388 };
389
390
391 static ngx_int_t
392 ngx_http_mp4_handler(ngx_http_request_t *r)
393 {
394 u_char *last;
395 size_t root;
396 ngx_int_t rc, start;
397 ngx_uint_t level;
398 ngx_str_t path, value;
399 ngx_log_t *log;
400 ngx_buf_t *b;
401 ngx_chain_t out;
402 ngx_http_mp4_file_t *mp4;
403 ngx_open_file_info_t of;
404 ngx_http_core_loc_conf_t *clcf;
405
406 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
407 return NGX_HTTP_NOT_ALLOWED;
408 }
409
410 if (r->uri.data[r->uri.len - 1] == '/') {
411 return NGX_DECLINED;
412 }
413
414 rc = ngx_http_discard_request_body(r);
415
416 if (rc != NGX_OK) {
417 return rc;
418 }
419
420 last = ngx_http_map_uri_to_path(r, &path, &root, 0);
421 if (last == NULL) {
422 return NGX_HTTP_INTERNAL_SERVER_ERROR;
423 }
424
425 log = r->connection->log;
426
427 path.len = last - path.data;
428
429 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
430 "http mp4 filename: \"%V\"", &path);
431
432 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
433
434 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
435
436 of.read_ahead = clcf->read_ahead;
437 of.directio = NGX_MAX_OFF_T_VALUE;
438 of.valid = clcf->open_file_cache_valid;
439 of.min_uses = clcf->open_file_cache_min_uses;
440 of.errors = clcf->open_file_cache_errors;
441 of.events = clcf->open_file_cache_events;
442
443 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
444 != NGX_OK)
445 {
446 switch (of.err) {
447
448 case 0:
449 return NGX_HTTP_INTERNAL_SERVER_ERROR;
450
451 case NGX_ENOENT:
452 case NGX_ENOTDIR:
453 case NGX_ENAMETOOLONG:
454
455 level = NGX_LOG_ERR;
456 rc = NGX_HTTP_NOT_FOUND;
457 break;
458
459 case NGX_EACCES:
460
461 level = NGX_LOG_ERR;
462 rc = NGX_HTTP_FORBIDDEN;
463 break;
464
465 default:
466
467 level = NGX_LOG_CRIT;
468 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
469 break;
470 }
471
472 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) {
473 ngx_log_error(level, log, of.err,
474 "%s \"%s\" failed", of.failed, path.data);
475 }
476
477 return rc;
478 }
479
480 if (!of.is_file) {
481
482 if (ngx_close_file(of.fd) == NGX_FILE_ERROR) {
483 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
484 ngx_close_file_n " \"%s\" failed", path.data);
485 }
486
487 return NGX_DECLINED;
488 }
489
490 r->root_tested = !r->error_page;
491 r->allow_ranges = 1;
492
493 start = -1;
494 r->headers_out.content_length_n = of.size;
495 mp4 = NULL;
496 b = NULL;
497
498 if (r->args.len) {
499
500 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
501
502 /*
503 * A Flash player may send start value with a lot of digits
504 * after dot so strtod() is used instead of atofp(). NaNs and
505 * infinities become negative numbers after (int) conversion.
506 */
507
508 ngx_set_errno(0);
509 start = (int) (strtod((char *) value.data, NULL) * 1000);
510
511 if (ngx_errno == 0 && start >= 0) {
512 r->allow_ranges = 0;
513
514 mp4 = ngx_pcalloc(r->pool, sizeof(ngx_http_mp4_file_t));
515 if (mp4 == NULL) {
516 return NGX_HTTP_INTERNAL_SERVER_ERROR;
517 }
518
519 mp4->file.fd = of.fd;
520 mp4->file.name = path;
521 mp4->file.log = r->connection->log;;
522 mp4->end = of.size;
523 mp4->start = (ngx_uint_t) start;
524 mp4->request = r;
525
526 switch (ngx_http_mp4_process(mp4)) {
527
528 case NGX_DECLINED:
529 if (mp4->buffer) {
530 ngx_pfree(r->pool, mp4->buffer);
531 }
532
533 ngx_pfree(r->pool, mp4);
534 mp4 = NULL;
535
536 break;
537
538 case NGX_OK:
539 r->headers_out.content_length_n = mp4->content_length;
540 break;
541
542 default: /* NGX_ERROR */
543 if (mp4->buffer) {
544 ngx_pfree(r->pool, mp4->buffer);
545 }
546
547 ngx_pfree(r->pool, mp4);
548
549 return NGX_HTTP_INTERNAL_SERVER_ERROR;
550 }
551 }
552 }
553 }
554
555 log->action = "sending mp4 to client";
556
557 if (clcf->directio <= of.size) {
558
559 /*
560 * DIRECTIO is set on transfer only
561 * to allow kernel to cache "moov" atom
562 */
563
564 if (ngx_directio_on(of.fd) == NGX_FILE_ERROR) {
565 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
566 ngx_directio_on_n " \"%s\" failed", path.data);
567 }
568
569 of.is_directio = 1;
570
571 if (mp4) {
572 mp4->file.directio = 1;
573 }
574 }
575
576 r->headers_out.status = NGX_HTTP_OK;
577 r->headers_out.last_modified_time = of.mtime;
578
579 if (ngx_http_set_content_type(r) != NGX_OK) {
580 return NGX_HTTP_INTERNAL_SERVER_ERROR;
581 }
582
583 if (mp4 == NULL) {
584 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
585 if (b == NULL) {
586 return NGX_HTTP_INTERNAL_SERVER_ERROR;
587 }
588
589 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
590 if (b->file == NULL) {
591 return NGX_HTTP_INTERNAL_SERVER_ERROR;
592 }
593 }
594
595 rc = ngx_http_send_header(r);
596
597 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
598 return rc;
599 }
600
601 if (mp4) {
602 return ngx_http_output_filter(r, mp4->out);
603 }
604
605 b->file_pos = 0;
606 b->file_last = of.size;
607
608 b->in_file = b->file_last ? 1 : 0;
609 b->last_buf = 1;
610 b->last_in_chain = 1;
611
612 b->file->fd = of.fd;
613 b->file->name = path;
614 b->file->log = log;
615 b->file->directio = of.is_directio;
616
617 out.buf = b;
618 out.next = NULL;
619
620 return ngx_http_output_filter(r, &out);
621 }
622
623
624 static ngx_int_t
625 ngx_http_mp4_process(ngx_http_mp4_file_t *mp4)
626 {
627 off_t start_offset, adjustment;
628 ngx_int_t rc;
629 ngx_uint_t i, j;
630 ngx_chain_t **prev;
631 ngx_http_mp4_trak_t *trak;
632 ngx_http_mp4_conf_t *conf;
633
634 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
635 "mp4 start:%ui", mp4->start);
636
637 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
638
639 mp4->buffer_size = conf->buffer_size;
640
641 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_atoms, mp4->end);
642 if (rc != NGX_OK) {
643 return rc;
644 }
645
646 if (mp4->trak.nelts == 0) {
647 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
648 "no mp4 trak atoms were found in \"%s\"",
649 mp4->file.name.data);
650 return NGX_ERROR;
651 }
652
653 if (mp4->mdat_atom.buf == NULL) {
654 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
655 "no mp4 mdat atom was found in \"%s\"",
656 mp4->file.name.data);
657 return NGX_ERROR;
658 }
659
660 prev = &mp4->out;
661
662 if (mp4->ftyp_atom.buf) {
663 *prev = &mp4->ftyp_atom;
664 prev = &mp4->ftyp_atom.next;
665 }
666
667 *prev = &mp4->moov_atom;
668 prev = &mp4->moov_atom.next;
669
670 if (mp4->mvhd_atom.buf) {
671 mp4->moov_size += mp4->mvhd_atom_buf.last - mp4->mvhd_atom_buf.pos;
672 *prev = &mp4->mvhd_atom;
673 prev = &mp4->mvhd_atom.next;
674 }
675
676 start_offset = mp4->end;
677 trak = mp4->trak.elts;
678
679 for (i = 0; i < mp4->trak.nelts; i++) {
680
681 if (ngx_http_mp4_update_stts_atom(mp4, &trak[i]) != NGX_OK) {
682 return NGX_ERROR;
683 }
684
685 if (ngx_http_mp4_update_stss_atom(mp4, &trak[i]) != NGX_OK) {
686 return NGX_ERROR;
687 }
688
689 ngx_http_mp4_update_ctts_atom(mp4, &trak[i]);
690
691 if (ngx_http_mp4_update_stsc_atom(mp4, &trak[i]) != NGX_OK) {
692 return NGX_ERROR;
693 }
694
695 ngx_http_mp4_update_stsz_atom(mp4, &trak[i]);
696
697 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
698 if (ngx_http_mp4_update_co64_atom(mp4, &trak[i]) != NGX_OK) {
699 return NGX_ERROR;
700 }
701
702 } else {
703 if (ngx_http_mp4_update_stco_atom(mp4, &trak[i]) != NGX_OK) {
704 return NGX_ERROR;
705 }
706 }
707
708 ngx_http_mp4_update_stbl_atom(mp4, &trak[i]);
709 ngx_http_mp4_update_minf_atom(mp4, &trak[i]);
710 trak[i].size += trak[i].mdhd_size;
711 trak[i].size += trak[i].hdlr_size;
712 ngx_http_mp4_update_mdia_atom(mp4, &trak[i]);
713 trak[i].size += trak[i].tkhd_size;
714 ngx_http_mp4_update_trak_atom(mp4, &trak[i]);
715
716 mp4->moov_size += trak[i].size;
717
718 if (start_offset > trak[i].start_offset) {
719 start_offset = trak[i].start_offset;
720 }
721
722 *prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM];
723 prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM].next;
724
725 for (j = 0; j < NGX_HTTP_MP4_LAST_ATOM + 1; j++) {
726 if (trak[i].out[j].buf) {
727 *prev = &trak[i].out[j];
728 prev = &trak[i].out[j].next;
729 }
730 }
731 }
732
733 mp4->moov_size += 8;
734
735 ngx_mp4_set_32value(mp4->moov_atom_header, mp4->moov_size);
736 ngx_mp4_set_atom_name(mp4->moov_atom_header, 'm', 'o', 'o', 'v');
737 mp4->content_length += mp4->moov_size;
738
739 *prev = &mp4->mdat_atom;
740
741 adjustment = mp4->ftyp_size + mp4->moov_size
742 + ngx_http_mp4_update_mdat_atom(mp4, start_offset)
743 - start_offset;
744
745 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
746 "mp4 adjustment:%D", adjustment);
747
748 for (i = 0; i < mp4->trak.nelts; i++) {
749 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
750 ngx_http_mp4_adjust_co64_atom(mp4, &trak[i], adjustment);
751 } else {
752 ngx_http_mp4_adjust_stco_atom(mp4, &trak[i], (int32_t) adjustment);
753 }
754 }
755
756 return NGX_OK;
757 }
758
759
760 typedef struct {
761 u_char size[4];
762 u_char name[4];
763 } ngx_mp4_atom_header_t;
764
765 typedef struct {
766 u_char size[4];
767 u_char name[4];
768 u_char size64[8];
769 } ngx_mp4_atom_header64_t;
770
771
772 static ngx_int_t
773 ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
774 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size)
775 {
776 off_t end;
777 size_t atom_header_size;
778 u_char *atom_header, *atom_name;
779 uint64_t atom_size;
780 ngx_int_t rc;
781 ngx_uint_t n;
782
783 end = mp4->offset + atom_data_size;
784
785 while (mp4->offset < end) {
786
787 if (mp4->buffer_pos + sizeof(uint32_t) > mp4->buffer_end) {
788 if (ngx_http_mp4_read(mp4) != NGX_OK) {
789 return NGX_ERROR;
790 }
791 }
792
793 atom_header = mp4->buffer_pos;
794 atom_size = ngx_mp4_get_32value(atom_header);
795 atom_header_size = sizeof(ngx_mp4_atom_header_t);
796
797 if (atom_size == 0) {
798 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
799 "mp4 atom end");
800 return NGX_OK;
801 }
802
803 if (atom_size < sizeof(ngx_mp4_atom_header_t)) {
804
805 if (atom_size == 1) {
806
807 if (mp4->buffer_pos + sizeof(ngx_mp4_atom_header64_t)
808 > mp4->buffer_end)
809 {
810 if (ngx_http_mp4_read(mp4) != NGX_OK) {
811 return NGX_ERROR;
812 }
813
814 atom_header = mp4->buffer_pos;
815 }
816
817 /* 64-bit atom size */
818 atom_size = ngx_mp4_get_64value(atom_header + 8);
819 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
820
821 } else {
822 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
823 "\"%s\" mp4 atom is too small:%uL",
824 mp4->file.name.data, atom_size);
825 return NGX_ERROR;
826 }
827 }
828
829 if (mp4->buffer_pos + sizeof(ngx_mp4_atom_header_t) > mp4->buffer_end) {
830 if (ngx_http_mp4_read(mp4) != NGX_OK) {
831 return NGX_ERROR;
832 }
833
834 atom_header = mp4->buffer_pos;
835 }
836
837 atom_name = atom_header + sizeof(uint32_t);
838
839 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
840 "mp4 atom: %*s @%O:%uL",
841 4, atom_name, mp4->offset, atom_size);
842
843 for (n = 0; atom[n].name; n++) {
844
845 if (ngx_strncmp(atom_name, atom[n].name, 4) == 0) {
846
847 ngx_mp4_atom_next(mp4, atom_header_size);
848
849 rc = atom[n].handler(mp4, atom_size - atom_header_size);
850 if (rc != NGX_OK) {
851 return rc;
852 }
853
854 goto next;
855 }
856 }
857
858 ngx_mp4_atom_next(mp4, atom_size);
859
860 next:
861 continue;
862 }
863
864 return NGX_OK;
865 }
866
867
868 static ngx_int_t
869 ngx_http_mp4_read(ngx_http_mp4_file_t *mp4)
870 {
871 ngx_int_t n;
872
873 if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) {
874 mp4->buffer_size = (size_t) (mp4->end - mp4->offset);
875 }
876
877 if (mp4->buffer == NULL) {
878 mp4->buffer = ngx_palloc(mp4->request->pool, mp4->buffer_size);
879 if (mp4->buffer == NULL) {
880 return NGX_ERROR;
881 }
882
883 mp4->buffer_start = mp4->buffer;
884 mp4->buffer_end = mp4->buffer + mp4->buffer_size;
885 }
886
887 n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size,
888 mp4->offset);
889
890 if (n == NGX_ERROR) {
891 return NGX_ERROR;
892 }
893
894 if (n == 0) {
895 return NGX_OK;
896 }
897
898 mp4->buffer_pos = mp4->buffer_start;
899
900 return NGX_OK;
901 }
902
903
904 static ngx_int_t
905 ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
906 {
907 u_char *ftyp_atom;
908 size_t atom_size;
909 ngx_buf_t *atom;
910
911 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ftyp atom");
912
913 if (atom_data_size > 1024) {
914 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
915 "\"%s\" mp4 ftyp atom is too large:%uL",
916 mp4->file.name.data, atom_data_size);
917 return NGX_ERROR;
918 }
919
920 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
921
922 ftyp_atom = ngx_palloc(mp4->request->pool, atom_size);
923 if (ftyp_atom == NULL) {
924 return NGX_ERROR;
925 }
926
927 ngx_mp4_set_32value(ftyp_atom, atom_size);
928 ngx_mp4_set_atom_name(ftyp_atom, 'f', 't', 'y', 'p');
929
930 /*
931 * only moov atom content is guaranteed to be in mp4->buffer
932 * during sending response, so ftyp atom content should be copied
933 */
934 ngx_memcpy(ftyp_atom + sizeof(ngx_mp4_atom_header_t),
935 ngx_mp4_atom_data(mp4), (size_t) atom_data_size);
936
937 atom = &mp4->ftyp_atom_buf;
938 atom->temporary = 1;
939 atom->pos = ftyp_atom;
940 atom->last = ftyp_atom + atom_size;
941
942 mp4->ftyp_atom.buf = atom;
943 mp4->ftyp_size = atom_size;
944 mp4->content_length = atom_size;
945
946 ngx_mp4_atom_next(mp4, atom_data_size);
947
948 return NGX_OK;
949 }
950
951
952 /*
953 * Small excess buffer to process atoms after moov atom, mp4->buffer_start
954 * will be set to this buffer part after moov atom processing.
955 */
956 #define NGX_HTTP_MP4_MOOV_BUFFER_EXCESS (4 * 1024)
957
958 static ngx_int_t
959 ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
960 {
961 ngx_int_t rc;
962 ngx_uint_t no_mdat;
963 ngx_buf_t *atom;
964 ngx_http_mp4_conf_t *conf;
965
966 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom");
967
968 no_mdat = (mp4->mdat_atom.buf == NULL);
969
970 if (no_mdat && mp4->start == 0) {
971 /*
972 * send original file if moov atom resides before
973 * mdat atom and client requests integral file
974 */
975 return NGX_DECLINED;
976 }
977
978 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
979
980 if (atom_data_size > mp4->buffer_size) {
981
982 if (atom_data_size > conf->max_buffer_size) {
983 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
984 "\"%s\" mp4 moov atom is too large:%uL, "
985 "you may want to increase mp4_max_buffer_size",
986 mp4->file.name.data, atom_data_size);
987 return NGX_ERROR;
988 }
989
990 ngx_pfree(mp4->request->pool, mp4->buffer);
991 mp4->buffer = NULL;
992 mp4->buffer_pos = NULL;
993 mp4->buffer_end = NULL;
994
995 mp4->buffer_size = (size_t) atom_data_size
996 + NGX_HTTP_MP4_MOOV_BUFFER_EXCESS * no_mdat;
997 }
998
999 mp4->trak.elts = &mp4->traks;
1000 mp4->trak.size = sizeof(ngx_http_mp4_trak_t);
1001 mp4->trak.nalloc = 2;
1002 mp4->trak.pool = mp4->request->pool;
1003
1004 atom = &mp4->moov_atom_buf;
1005 atom->temporary = 1;
1006 atom->pos = mp4->moov_atom_header;
1007 atom->last = mp4->moov_atom_header + 8;
1008
1009 mp4->moov_atom.buf = &mp4->moov_atom_buf;
1010
1011 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_moov_atoms, atom_data_size);
1012
1013 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom done");
1014
1015 if (no_mdat) {
1016 mp4->buffer_start = mp4->buffer_pos;
1017 mp4->buffer_size = NGX_HTTP_MP4_MOOV_BUFFER_EXCESS;
1018
1019 } else {
1020 /* skip atoms after moov atom */
1021 mp4->offset = mp4->end;
1022 }
1023
1024 return rc;
1025 }
1026
1027
1028 static ngx_int_t
1029 ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1030 {
1031 ngx_buf_t *data;
1032
1033 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom");
1034
1035 data = &mp4->mdat_data_buf;
1036 data->file = &mp4->file;
1037 data->in_file = 1;
1038 data->last_buf = 1;
1039 data->last_in_chain = 1;
1040 data->file_last = mp4->offset + atom_data_size;
1041
1042 mp4->mdat_atom.buf = &mp4->mdat_atom_buf;
1043 mp4->mdat_atom.next = &mp4->mdat_data;
1044 mp4->mdat_data.buf = data;
1045
1046 if (mp4->trak.nelts) {
1047 /* skip atoms after mdat atom */
1048 mp4->offset = mp4->end;
1049
1050 } else {
1051 ngx_mp4_atom_next(mp4, atom_data_size);
1052 }
1053
1054 return NGX_OK;
1055 }
1056
1057
1058 static size_t
1059 ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset)
1060 {
1061 off_t atom_data_size;
1062 u_char *atom_header;
1063 uint32_t atom_header_size;
1064 uint64_t atom_size;
1065 ngx_buf_t *atom;
1066
1067 atom_data_size = mp4->mdat_data.buf->file_last - start_offset;
1068 mp4->mdat_data.buf->file_pos = start_offset;
1069 mp4->content_length += atom_data_size;
1070
1071 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1072 "mdat new offset @%O:%O", start_offset, atom_data_size);
1073
1074 atom_header = mp4->mdat_atom_header;
1075
1076 if ((uint64_t) atom_data_size > 0xffffffff) {
1077 atom_size = 1;
1078 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
1079 ngx_mp4_set_64value(atom_header + sizeof(ngx_mp4_atom_header_t),
1080 sizeof(ngx_mp4_atom_header64_t) + atom_data_size);
1081 } else {
1082 atom_size = sizeof(ngx_mp4_atom_header_t) + atom_data_size;
1083 atom_header_size = sizeof(ngx_mp4_atom_header_t);
1084 }
1085
1086 ngx_mp4_set_32value(atom_header, atom_size);
1087 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'a', 't');
1088
1089 atom = &mp4->mdat_atom_buf;
1090 atom->temporary = 1;
1091 atom->pos = atom_header;
1092 atom->last = atom_header + atom_header_size;
1093
1094 return atom_header_size;
1095 }
1096
1097
1098 typedef struct {
1099 u_char size[4];
1100 u_char name[4];
1101 u_char version[1];
1102 u_char flags[3];
1103 u_char creation_time[4];
1104 u_char modification_time[4];
1105 u_char timescale[4];
1106 u_char duration[4];
1107 u_char rate[4];
1108 u_char volume[2];
1109 u_char reserved[10];
1110 u_char matrix[36];
1111 u_char preview_time[4];
1112 u_char preview_duration[4];
1113 u_char poster_time[4];
1114 u_char selection_time[4];
1115 u_char selection_duration[4];
1116 u_char current_time[4];
1117 u_char next_track_id[4];
1118 } ngx_mp4_mvhd_atom_t;
1119
1120 typedef struct {
1121 u_char size[4];
1122 u_char name[4];
1123 u_char version[1];
1124 u_char flags[3];
1125 u_char creation_time[8];
1126 u_char modification_time[8];
1127 u_char timescale[4];
1128 u_char duration[8];
1129 u_char rate[4];
1130 u_char volume[2];
1131 u_char reserved[10];
1132 u_char matrix[36];
1133 u_char preview_time[4];
1134 u_char preview_duration[4];
1135 u_char poster_time[4];
1136 u_char selection_time[4];
1137 u_char selection_duration[4];
1138 u_char current_time[4];
1139 u_char next_track_id[4];
1140 } ngx_mp4_mvhd64_atom_t;
1141
1142
1143 static ngx_int_t
1144 ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1145 {
1146 u_char *atom_header;
1147 size_t atom_size;
1148 uint32_t timescale;
1149 uint64_t duration;
1150 ngx_buf_t *atom;
1151 ngx_mp4_mvhd_atom_t *mvhd_atom;
1152 ngx_mp4_mvhd64_atom_t *mvhd64_atom;
1153
1154 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom");
1155
1156 atom_header = ngx_mp4_atom_header(mp4);
1157 mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header;
1158 mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header;
1159 ngx_mp4_set_atom_name(atom_header, 'm', 'v', 'h', 'd');
1160
1161 if (mvhd_atom->version[0] == 0) {
1162 /* version 0: 32-bit duration */
1163 timescale = ngx_mp4_get_32value(mvhd_atom->timescale);
1164 duration = ngx_mp4_get_32value(mvhd_atom->duration);
1165
1166 } else {
1167 /* version 1: 64-bit duration */
1168 timescale = ngx_mp4_get_32value(mvhd64_atom->timescale);
1169 duration = ngx_mp4_get_64value(mvhd64_atom->duration);
1170 }
1171
1172 mp4->timescale = timescale;
1173
1174 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1175 "mvhd timescale:%uD, duration:%uL, time:%.3fs",
1176 timescale, duration, (double) duration / timescale);
1177
1178 duration -= (uint64_t) mp4->start * timescale / 1000;
1179
1180 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1181 "mvhd new duration:%uL, time:%.3fs",
1182 duration, (double) duration / timescale);
1183
1184 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1185 ngx_mp4_set_32value(mvhd_atom->size, atom_size);
1186
1187 if (mvhd_atom->version[0] == 0) {
1188 ngx_mp4_set_32value(mvhd_atom->duration, duration);
1189
1190 } else {
1191 ngx_mp4_set_64value(mvhd64_atom->duration, duration);
1192 }
1193
1194 atom = &mp4->mvhd_atom_buf;
1195 atom->temporary = 1;
1196 atom->pos = atom_header;
1197 atom->last = atom_header + atom_size;
1198
1199 mp4->mvhd_atom.buf = atom;
1200
1201 ngx_mp4_atom_next(mp4, atom_data_size);
1202
1203 return NGX_OK;
1204 }
1205
1206
1207 static ngx_int_t
1208 ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1209 {
1210 u_char *atom_header, *atom_end;
1211 off_t atom_file_end;
1212 ngx_int_t rc;
1213 ngx_buf_t *atom;
1214 ngx_http_mp4_trak_t *trak;
1215
1216 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom");
1217
1218 trak = ngx_array_push(&mp4->trak);
1219 if (trak == NULL) {
1220 return NGX_ERROR;
1221 }
1222
1223 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1224
1225 atom_header = ngx_mp4_atom_header(mp4);
1226 ngx_mp4_set_atom_name(atom_header, 't', 'r', 'a', 'k');
1227
1228 atom = &trak->trak_atom_buf;
1229 atom->temporary = 1;
1230 atom->pos = atom_header;
1231 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1232
1233 trak->out[NGX_HTTP_MP4_TRAK_ATOM].buf = atom;
1234
1235 atom_end = mp4->buffer_pos + atom_data_size;
1236 atom_file_end = mp4->offset + atom_data_size;
1237
1238 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_trak_atoms, atom_data_size);
1239
1240 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1241 "mp4 trak atom: %i", rc);
1242
1243 if (rc == NGX_DECLINED) {
1244 /* skip this trak */
1245 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1246 mp4->trak.nelts--;
1247 mp4->buffer_pos = atom_end;
1248 mp4->offset = atom_file_end;
1249 return NGX_OK;
1250 }
1251
1252 return rc;
1253 }
1254
1255
1256 static void
1257 ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
1258 ngx_http_mp4_trak_t *trak)
1259 {
1260 ngx_buf_t *atom;
1261
1262 trak->size += sizeof(ngx_mp4_atom_header_t);
1263 atom = &trak->trak_atom_buf;
1264 ngx_mp4_set_32value(atom->pos, trak->size);
1265 }
1266
1267
1268 static ngx_int_t
1269 ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1270 {
1271 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1272 "\"%s\" mp4 compressed moov atom (cmov) is not supported",
1273 mp4->file.name.data);
1274
1275 return NGX_ERROR;
1276 }
1277
1278
1279 typedef struct {
1280 u_char size[4];
1281 u_char name[4];
1282 u_char version[1];
1283 u_char flags[3];
1284 u_char creation_time[4];
1285 u_char modification_time[4];
1286 u_char track_id[4];
1287 u_char reserved1[4];
1288 u_char duration[4];
1289 u_char reserved2[8];
1290 u_char layer[2];
1291 u_char group[2];
1292 u_char volume[2];
1293 u_char reverved3[2];
1294 u_char matrix[36];
1295 u_char width[4];
1296 u_char heigth[4];
1297 } ngx_mp4_tkhd_atom_t;
1298
1299 typedef struct {
1300 u_char size[4];
1301 u_char name[4];
1302 u_char version[1];
1303 u_char flags[3];
1304 u_char creation_time[8];
1305 u_char modification_time[8];
1306 u_char track_id[4];
1307 u_char reserved1[4];
1308 u_char duration[8];
1309 u_char reserved2[8];
1310 u_char layer[2];
1311 u_char group[2];
1312 u_char volume[2];
1313 u_char reverved3[2];
1314 u_char matrix[36];
1315 u_char width[4];
1316 u_char heigth[4];
1317 } ngx_mp4_tkhd64_atom_t;
1318
1319
1320 static ngx_int_t
1321 ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1322 {
1323 u_char *atom_header;
1324 size_t atom_size;
1325 uint64_t duration;
1326 ngx_buf_t *atom;
1327 ngx_http_mp4_trak_t *trak;
1328 ngx_mp4_tkhd_atom_t *tkhd_atom;
1329 ngx_mp4_tkhd64_atom_t *tkhd64_atom;
1330
1331 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 tkhd atom");
1332
1333 atom_header = ngx_mp4_atom_header(mp4);
1334 tkhd_atom = (ngx_mp4_tkhd_atom_t *) atom_header;
1335 tkhd64_atom = (ngx_mp4_tkhd64_atom_t *) atom_header;
1336 ngx_mp4_set_atom_name(tkhd_atom, 't', 'k', 'h', 'd');
1337
1338 if (tkhd_atom->version[0] == 0) {
1339 /* version 0: 32-bit duration */
1340 duration = ngx_mp4_get_32value(tkhd_atom->duration);
1341
1342 } else {
1343 /* version 1: 64-bit duration */
1344 duration = ngx_mp4_get_64value(tkhd64_atom->duration);
1345 }
1346
1347 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1348 "tkhd duration:%uL, time:%.3fs",
1349 duration, (double) duration / mp4->timescale);
1350
1351 duration -= (uint64_t) mp4->start * mp4->timescale / 1000;
1352
1353 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1354 "tkhd new duration:%uL, time:%.3fs",
1355 duration, (double) duration / mp4->timescale);
1356
1357 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1358
1359 trak = ngx_mp4_last_trak(mp4);
1360 trak->tkhd_size = atom_size;
1361
1362 ngx_mp4_set_32value(tkhd_atom->size, atom_size);
1363
1364 if (tkhd_atom->version[0] == 0) {
1365 ngx_mp4_set_32value(tkhd_atom->duration, duration);
1366
1367 } else {
1368 ngx_mp4_set_64value(tkhd64_atom->duration, duration);
1369 }
1370
1371 atom = &trak->tkhd_atom_buf;
1372 atom->temporary = 1;
1373 atom->pos = atom_header;
1374 atom->last = atom_header + atom_size;
1375
1376 trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf = atom;
1377
1378 ngx_mp4_atom_next(mp4, atom_data_size);
1379
1380 return NGX_OK;
1381 }
1382
1383
1384 static ngx_int_t
1385 ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1386 {
1387 u_char *atom_header;
1388 ngx_buf_t *atom;
1389 ngx_http_mp4_trak_t *trak;
1390
1391 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process mdia atom");
1392
1393 atom_header = ngx_mp4_atom_header(mp4);
1394 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'i', 'a');
1395
1396 trak = ngx_mp4_last_trak(mp4);
1397
1398 atom = &trak->mdia_atom_buf;
1399 atom->temporary = 1;
1400 atom->pos = atom_header;
1401 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1402
1403 trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf = atom;
1404
1405 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_mdia_atoms, atom_data_size);
1406 }
1407
1408
1409 static void
1410 ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
1411 ngx_http_mp4_trak_t *trak)
1412 {
1413 ngx_buf_t *atom;
1414
1415 trak->size += sizeof(ngx_mp4_atom_header_t);
1416 atom = &trak->mdia_atom_buf;
1417 ngx_mp4_set_32value(atom->pos, trak->size);
1418 }
1419
1420
1421 typedef struct {
1422 u_char size[4];
1423 u_char name[4];
1424 u_char version[1];
1425 u_char flags[3];
1426 u_char creation_time[4];
1427 u_char modification_time[4];
1428 u_char timescale[4];
1429 u_char duration[4];
1430 u_char language[2];
1431 u_char quality[2];
1432 } ngx_mp4_mdhd_atom_t;
1433
1434 typedef struct {
1435 u_char size[4];
1436 u_char name[4];
1437 u_char version[1];
1438 u_char flags[3];
1439 u_char creation_time[8];
1440 u_char modification_time[8];
1441 u_char timescale[4];
1442 u_char duration[8];
1443 u_char language[2];
1444 u_char quality[2];
1445 } ngx_mp4_mdhd64_atom_t;
1446
1447
1448 static ngx_int_t
1449 ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1450 {
1451 u_char *atom_header;
1452 size_t atom_size;
1453 uint32_t timescale;
1454 uint64_t duration;
1455 ngx_buf_t *atom;
1456 ngx_http_mp4_trak_t *trak;
1457 ngx_mp4_mdhd_atom_t *mdhd_atom;
1458 ngx_mp4_mdhd64_atom_t *mdhd64_atom;
1459
1460 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdhd atom");
1461
1462 atom_header = ngx_mp4_atom_header(mp4);
1463 mdhd_atom = (ngx_mp4_mdhd_atom_t *) atom_header;
1464 mdhd64_atom = (ngx_mp4_mdhd64_atom_t *) atom_header;
1465 ngx_mp4_set_atom_name(mdhd_atom, 'm', 'd', 'h', 'd');
1466
1467 if (mdhd_atom->version[0] == 0) {
1468 /* version 0: everything is 32-bit */
1469 timescale = ngx_mp4_get_32value(mdhd_atom->timescale);
1470 duration = ngx_mp4_get_32value(mdhd_atom->duration);
1471
1472 } else {
1473 /* version 1: 64-bit duration and 32-bit timescale */
1474 timescale = ngx_mp4_get_32value(mdhd64_atom->timescale);
1475 duration = ngx_mp4_get_64value(mdhd64_atom->duration);
1476 }
1477
1478 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1479 "mdhd timescale:%uD, duration:%uL, time:%.3fs",
1480 timescale, duration, (double) duration / timescale);
1481
1482 duration -= (uint64_t) mp4->start * timescale / 1000;
1483
1484 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1485 "mdhd new duration:%uL, time:%.3fs",
1486 duration, (double) duration / timescale);
1487
1488 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1489
1490 trak = ngx_mp4_last_trak(mp4);
1491 trak->mdhd_size = atom_size;
1492 trak->timescale = timescale;
1493
1494 ngx_mp4_set_32value(mdhd_atom->size, atom_size);
1495
1496 if (mdhd_atom->version[0] == 0) {
1497 ngx_mp4_set_32value(mdhd_atom->duration, duration);
1498
1499 } else {
1500 ngx_mp4_set_64value(mdhd64_atom->duration, duration);
1501 }
1502
1503 atom = &trak->mdhd_atom_buf;
1504 atom->temporary = 1;
1505 atom->pos = atom_header;
1506 atom->last = atom_header + atom_size;
1507
1508 trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf = atom;
1509
1510 ngx_mp4_atom_next(mp4, atom_data_size);
1511
1512 return NGX_OK;
1513 }
1514
1515
1516 static ngx_int_t
1517 ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1518 {
1519 u_char *atom_header;
1520 size_t atom_size;
1521 ngx_buf_t *atom;
1522 ngx_http_mp4_trak_t *trak;
1523
1524 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 hdlr atom");
1525
1526 atom_header = ngx_mp4_atom_header(mp4);
1527 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1528 ngx_mp4_set_32value(atom_header, atom_size);
1529 ngx_mp4_set_atom_name(atom_header, 'h', 'd', 'l', 'r');
1530
1531 trak = ngx_mp4_last_trak(mp4);
1532
1533 atom = &trak->hdlr_atom_buf;
1534 atom->temporary = 1;
1535 atom->pos = atom_header;
1536 atom->last = atom_header + atom_size;
1537
1538 trak->hdlr_size = atom_size;
1539 trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf = atom;
1540
1541 ngx_mp4_atom_next(mp4, atom_data_size);
1542
1543 return NGX_OK;
1544 }
1545
1546
1547 static ngx_int_t
1548 ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1549 {
1550 u_char *atom_header;
1551 ngx_buf_t *atom;
1552 ngx_http_mp4_trak_t *trak;
1553
1554 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process minf atom");
1555
1556 atom_header = ngx_mp4_atom_header(mp4);
1557 ngx_mp4_set_atom_name(atom_header, 'm', 'i', 'n', 'f');
1558
1559 trak = ngx_mp4_last_trak(mp4);
1560
1561 atom = &trak->minf_atom_buf;
1562 atom->temporary = 1;
1563 atom->pos = atom_header;
1564 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1565
1566 trak->out[NGX_HTTP_MP4_MINF_ATOM].buf = atom;
1567
1568 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_minf_atoms, atom_data_size);
1569 }
1570
1571
1572 static void
1573 ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
1574 ngx_http_mp4_trak_t *trak)
1575 {
1576 ngx_buf_t *atom;
1577
1578 trak->size += sizeof(ngx_mp4_atom_header_t)
1579 + trak->vmhd_size
1580 + trak->smhd_size
1581 + trak->dinf_size;
1582 atom = &trak->minf_atom_buf;
1583 ngx_mp4_set_32value(atom->pos, trak->size);
1584 }
1585
1586
1587 static ngx_int_t
1588 ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1589 {
1590 u_char *atom_header;
1591 size_t atom_size;
1592 ngx_buf_t *atom;
1593 ngx_http_mp4_trak_t *trak;
1594
1595 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 vmhd atom");
1596
1597 atom_header = ngx_mp4_atom_header(mp4);
1598 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1599 ngx_mp4_set_32value(atom_header, atom_size);
1600 ngx_mp4_set_atom_name(atom_header, 'v', 'm', 'h', 'd');
1601
1602 trak = ngx_mp4_last_trak(mp4);
1603
1604 atom = &trak->vmhd_atom_buf;
1605 atom->temporary = 1;
1606 atom->pos = atom_header;
1607 atom->last = atom_header + atom_size;
1608
1609 trak->vmhd_size += atom_size;
1610 trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf = atom;
1611
1612 ngx_mp4_atom_next(mp4, atom_data_size);
1613
1614 return NGX_OK;
1615 }
1616
1617
1618 static ngx_int_t
1619 ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1620 {
1621 u_char *atom_header;
1622 size_t atom_size;
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, "mp4 smhd atom");
1627
1628 atom_header = ngx_mp4_atom_header(mp4);
1629 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1630 ngx_mp4_set_32value(atom_header, atom_size);
1631 ngx_mp4_set_atom_name(atom_header, 's', 'm', 'h', 'd');
1632
1633 trak = ngx_mp4_last_trak(mp4);
1634
1635 atom = &trak->smhd_atom_buf;
1636 atom->temporary = 1;
1637 atom->pos = atom_header;
1638 atom->last = atom_header + atom_size;
1639
1640 trak->vmhd_size += atom_size;
1641 trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf = atom;
1642
1643 ngx_mp4_atom_next(mp4, atom_data_size);
1644
1645 return NGX_OK;
1646 }
1647
1648
1649 static ngx_int_t
1650 ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1651 {
1652 u_char *atom_header;
1653 size_t atom_size;
1654 ngx_buf_t *atom;
1655 ngx_http_mp4_trak_t *trak;
1656
1657 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 dinf atom");
1658
1659 atom_header = ngx_mp4_atom_header(mp4);
1660 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1661 ngx_mp4_set_32value(atom_header, atom_size);
1662 ngx_mp4_set_atom_name(atom_header, 'd', 'i', 'n', 'f');
1663
1664 trak = ngx_mp4_last_trak(mp4);
1665
1666 atom = &trak->dinf_atom_buf;
1667 atom->temporary = 1;
1668 atom->pos = atom_header;
1669 atom->last = atom_header + atom_size;
1670
1671 trak->dinf_size += atom_size;
1672 trak->out[NGX_HTTP_MP4_DINF_ATOM].buf = atom;
1673
1674 ngx_mp4_atom_next(mp4, atom_data_size);
1675
1676 return NGX_OK;
1677 }
1678
1679
1680 static ngx_int_t
1681 ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1682 {
1683 u_char *atom_header;
1684 ngx_buf_t *atom;
1685 ngx_http_mp4_trak_t *trak;
1686
1687 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process stbl atom");
1688
1689 atom_header = ngx_mp4_atom_header(mp4);
1690 ngx_mp4_set_atom_name(atom_header, 's', 't', 'b', 'l');
1691
1692 trak = ngx_mp4_last_trak(mp4);
1693
1694 atom = &trak->stbl_atom_buf;
1695 atom->temporary = 1;
1696 atom->pos = atom_header;
1697 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1698
1699 trak->out[NGX_HTTP_MP4_STBL_ATOM].buf = atom;
1700
1701 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_stbl_atoms, atom_data_size);
1702 }
1703
1704
1705 static void
1706 ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
1707 ngx_http_mp4_trak_t *trak)
1708 {
1709 ngx_buf_t *atom;
1710
1711 trak->size += sizeof(ngx_mp4_atom_header_t);
1712 atom = &trak->stbl_atom_buf;
1713 ngx_mp4_set_32value(atom->pos, trak->size);
1714 }
1715
1716
1717 typedef struct {
1718 u_char size[4];
1719 u_char name[4];
1720 u_char version[1];
1721 u_char flags[3];
1722 u_char entries[4];
1723
1724 u_char media_size[4];
1725 u_char media_name[4];
1726 } ngx_mp4_stsd_atom_t;
1727
1728
1729 static ngx_int_t
1730 ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1731 {
1732 u_char *atom_header, *atom_table;
1733 size_t atom_size;
1734 ngx_buf_t *atom;
1735 ngx_mp4_stsd_atom_t *stsd_atom;
1736 ngx_http_mp4_trak_t *trak;
1737
1738 /* sample description atom */
1739
1740 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsd atom");
1741
1742 atom_header = ngx_mp4_atom_header(mp4);
1743 stsd_atom = (ngx_mp4_stsd_atom_t *) atom_header;
1744 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1745 atom_table = atom_header + atom_size;
1746 ngx_mp4_set_32value(stsd_atom->size, atom_size);
1747 ngx_mp4_set_atom_name(stsd_atom, 's', 't', 's', 'd');
1748
1749 if ((uint64_t) (sizeof(ngx_mp4_stsd_atom_t) - sizeof(ngx_mp4_atom_header_t))
1750 > atom_data_size)
1751 {
1752 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1753 "\"%s\" mp4 stsd atom too large",
1754 mp4->file.name.data);
1755 return NGX_ERROR;
1756 }
1757
1758 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1759 "stsd entries:%uD, media:%*s",
1760 ngx_mp4_get_32value(stsd_atom->entries),
1761 4, stsd_atom->media_name);
1762
1763 /* supported media format: "avc1" (H.264) and "mp4a" (MPEG-4/AAC) */
1764
1765 if (ngx_strncmp(stsd_atom->media_name, "avc1", 4) != 0
1766 && ngx_strncmp(stsd_atom->media_name, "mp4a", 4) != 0)
1767 {
1768 return NGX_DECLINED;
1769 }
1770
1771 trak = ngx_mp4_last_trak(mp4);
1772
1773 atom = &trak->stsd_atom_buf;
1774 atom->temporary = 1;
1775 atom->pos = atom_header;
1776 atom->last = atom_table;
1777
1778 trak->out[NGX_HTTP_MP4_STSD_ATOM].buf = atom;
1779 trak->size += atom_size;
1780
1781 ngx_mp4_atom_next(mp4, atom_data_size);
1782
1783 return NGX_OK;
1784 }
1785
1786
1787 typedef struct {
1788 u_char size[4];
1789 u_char name[4];
1790 u_char version[1];
1791 u_char flags[3];
1792 u_char entries[4];
1793 } ngx_mp4_stts_atom_t;
1794
1795 typedef struct {
1796 u_char count[4];
1797 u_char duration[4];
1798 } ngx_mp4_stts_entry_t;
1799
1800
1801 static ngx_int_t
1802 ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1803 {
1804 u_char *atom_header, *atom_table, *atom_end;
1805 uint32_t entries;
1806 ngx_buf_t *atom, *data;
1807 ngx_mp4_stts_atom_t *stts_atom;
1808 ngx_http_mp4_trak_t *trak;
1809
1810 /* time-to-sample atom */
1811
1812 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom");
1813
1814 atom_header = ngx_mp4_atom_header(mp4);
1815 stts_atom = (ngx_mp4_stts_atom_t *) atom_header;
1816 ngx_mp4_set_atom_name(stts_atom, 's', 't', 't', 's');
1817
1818 entries = ngx_mp4_get_32value(stts_atom->entries);
1819
1820 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1821 "mp4 time-to-sample entries:%uD", entries);
1822
1823 atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t);
1824 atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
1825
1826 if ((uint64_t) (atom_end - stts_atom->version) > atom_data_size) {
1827 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1828 "\"%s\" mp4 stts atom too large",
1829 mp4->file.name.data);
1830 return NGX_ERROR;
1831 }
1832
1833 trak = ngx_mp4_last_trak(mp4);
1834 trak->time_to_sample_entries = entries;
1835
1836 atom = &trak->stts_atom_buf;
1837 atom->temporary = 1;
1838 atom->pos = atom_header;
1839 atom->last = atom_table;
1840
1841 data = &trak->stts_data_buf;
1842 data->temporary = 1;
1843 data->pos = atom_table;
1844 data->last = atom_end;
1845
1846 trak->out[NGX_HTTP_MP4_STTS_ATOM].buf = atom;
1847 trak->out[NGX_HTTP_MP4_STTS_DATA].buf = data;
1848
1849 ngx_mp4_atom_next(mp4, atom_data_size);
1850
1851 return NGX_OK;
1852 }
1853
1854
1855 static ngx_int_t
1856 ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
1857 ngx_http_mp4_trak_t *trak)
1858 {
1859 size_t atom_size;
1860 uint32_t entries, count, duration;
1861 uint64_t start_time;
1862 ngx_buf_t *atom, *data;
1863 ngx_uint_t start_sample;
1864 ngx_mp4_stts_atom_t *stts_atom;
1865 ngx_mp4_stts_entry_t *entry, *end;
1866
1867 /*
1868 * mdia.minf.stbl.stts updating requires trak->timescale
1869 * from mdia.mdhd atom which may reside after mdia.minf
1870 */
1871
1872 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1873 "mp4 stts atom update");
1874
1875 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
1876
1877 if (data == NULL) {
1878 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1879 "no mp4 stts atoms were found in \"%s\"",
1880 mp4->file.name.data);
1881 return NGX_ERROR;
1882 }
1883
1884 entries = trak->time_to_sample_entries;
1885 start_time = mp4->start * trak->timescale / 1000;
1886
1887 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1888 "time-to-sample start_time:%uL", start_time);
1889
1890 start_sample = 0;
1891 entry = (ngx_mp4_stts_entry_t *) data->pos;
1892 end = (ngx_mp4_stts_entry_t *) data->last;
1893
1894 while (entry < end) {
1895 count = ngx_mp4_get_32value(entry->count);
1896 duration = ngx_mp4_get_32value(entry->duration);
1897
1898 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1899 "count:%uD, duration:%uD", count, duration);
1900
1901 if (start_time < count * duration) {
1902 start_sample += (ngx_uint_t) (start_time / duration);
1903 count -= start_sample;
1904 ngx_mp4_set_32value(entry->count, count);
1905 goto found;
1906 }
1907
1908 start_sample += count;
1909 start_time -= count * duration;
1910 entries--;
1911 entry++;
1912 }
1913
1914 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1915 "start time is out mp4 stts samples in \"%s\"",
1916 mp4->file.name.data);
1917
1918 return NGX_ERROR;
1919
1920 found:
1921
1922 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1923 "start_sample:%ui, new count:%uD", start_sample, count);
1924
1925 trak->start_sample = start_sample;
1926
1927 data->pos = (u_char *) entry;
1928 atom_size = sizeof(ngx_mp4_stts_atom_t) + (data->last - data->pos);
1929 trak->size += atom_size;
1930
1931 atom = trak->out[NGX_HTTP_MP4_STTS_ATOM].buf;
1932 stts_atom = (ngx_mp4_stts_atom_t *) atom->pos;
1933 ngx_mp4_set_32value(stts_atom->size, atom_size);
1934 ngx_mp4_set_32value(stts_atom->entries, entries);
1935
1936 return NGX_OK;
1937 }
1938
1939
1940 typedef struct {
1941 u_char size[4];
1942 u_char name[4];
1943 u_char version[1];
1944 u_char flags[3];
1945 u_char entries[4];
1946 } ngx_http_mp4_stss_atom_t;
1947
1948
1949 static ngx_int_t
1950 ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1951 {
1952 u_char *atom_header, *atom_table, *atom_end;
1953 uint32_t entries;
1954 ngx_buf_t *atom, *data;
1955 ngx_http_mp4_trak_t *trak;
1956 ngx_http_mp4_stss_atom_t *stss_atom;
1957
1958 /* sync samples atom */
1959
1960 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom");
1961
1962 atom_header = ngx_mp4_atom_header(mp4);
1963 stss_atom = (ngx_http_mp4_stss_atom_t *) atom_header;
1964 ngx_mp4_set_atom_name(stss_atom, 's', 't', 's', 's');
1965
1966 entries = ngx_mp4_get_32value(stss_atom->entries);
1967
1968 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1969 "sync sample entries:%uD", entries);
1970
1971 trak = ngx_mp4_last_trak(mp4);
1972 trak->sync_samples_entries = entries;
1973
1974 atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t);
1975
1976 atom = &trak->stss_atom_buf;
1977 atom->temporary = 1;
1978 atom->pos = atom_header;
1979 atom->last = atom_table;
1980
1981 atom_end = atom_table + entries * sizeof(uint32_t);
1982
1983 if ((uint64_t) (atom_end - stss_atom->version) > atom_data_size) {
1984 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1985 "\"%s\" mp4 stss atom too large", mp4->file.name.data);
1986 return NGX_ERROR;
1987 }
1988
1989 data = &trak->stss_data_buf;
1990 data->temporary = 1;
1991 data->pos = atom_table;
1992 data->last = atom_end;
1993
1994 trak->out[NGX_HTTP_MP4_STSS_ATOM].buf = atom;
1995 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = data;
1996
1997 ngx_mp4_atom_next(mp4, atom_data_size);
1998
1999 return NGX_OK;
2000 }
2001
2002
2003 static ngx_int_t
2004 ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
2005 ngx_http_mp4_trak_t *trak)
2006 {
2007 size_t atom_size;
2008 uint32_t entries, sample, start_sample, *entry, *end;
2009 ngx_buf_t *atom, *data;
2010 ngx_http_mp4_stss_atom_t *stss_atom;
2011
2012 /*
2013 * mdia.minf.stbl.stss updating requires trak->start_sample
2014 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2015 * atom which may reside after mdia.minf
2016 */
2017
2018 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2019 "mp4 stss atom update");
2020
2021 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
2022
2023 if (data == NULL) {
2024 return NGX_OK;
2025 }
2026
2027 /* sync samples starts from 1 */
2028 start_sample = trak->start_sample + 1;
2029 entries = trak->sync_samples_entries;
2030
2031 entry = (uint32_t *) data->pos;
2032 end = (uint32_t *) data->last;
2033
2034 while (entry < end) {
2035 sample = ngx_mp4_get_32value(entry);
2036
2037 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2038 "start:%uD, sync:%uD", start_sample, sample);
2039
2040 if (sample >= start_sample) {
2041 goto found;
2042 }
2043
2044 entries--;
2045 entry++;
2046 }
2047
2048 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2049 "start sample is out of mp4 stss atom in \"%s\"",
2050 mp4->file.name.data);
2051
2052 return NGX_ERROR;
2053
2054 found:
2055
2056 data->pos = (u_char *) entry;
2057
2058 start_sample = trak->start_sample;
2059
2060 while (entry < end) {
2061 sample = ngx_mp4_get_32value(entry);
2062 sample -= start_sample;
2063 ngx_mp4_set_32value(entry, sample);
2064 entry++;
2065 }
2066
2067 atom_size = sizeof(ngx_http_mp4_stss_atom_t) + (data->last - data->pos);
2068 trak->size += atom_size;
2069
2070 atom = trak->out[NGX_HTTP_MP4_STSS_ATOM].buf;
2071 stss_atom = (ngx_http_mp4_stss_atom_t *) atom->pos;
2072
2073 ngx_mp4_set_32value(stss_atom->size, atom_size);
2074 ngx_mp4_set_32value(stss_atom->entries, entries);
2075
2076 return NGX_OK;
2077 }
2078
2079
2080 typedef struct {
2081 u_char size[4];
2082 u_char name[4];
2083 u_char version[1];
2084 u_char flags[3];
2085 u_char entries[4];
2086 } ngx_mp4_ctts_atom_t;
2087
2088 typedef struct {
2089 u_char count[4];
2090 u_char offset[4];
2091 } ngx_mp4_ctts_entry_t;
2092
2093
2094 static ngx_int_t
2095 ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2096 {
2097 u_char *atom_header, *atom_table, *atom_end;
2098 uint32_t entries;
2099 ngx_buf_t *atom, *data;
2100 ngx_mp4_ctts_atom_t *ctts_atom;
2101 ngx_http_mp4_trak_t *trak;
2102
2103 /* composition offsets atom */
2104
2105 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom");
2106
2107 atom_header = ngx_mp4_atom_header(mp4);
2108 ctts_atom = (ngx_mp4_ctts_atom_t *) atom_header;
2109 ngx_mp4_set_atom_name(ctts_atom, 'c', 't', 't', 's');
2110
2111 entries = ngx_mp4_get_32value(ctts_atom->entries);
2112
2113 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2114 "composition offset entries:%uD", entries);
2115
2116 trak = ngx_mp4_last_trak(mp4);
2117 trak->composition_offset_entries = entries;
2118
2119 atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t);
2120
2121 atom = &trak->ctts_atom_buf;
2122 atom->temporary = 1;
2123 atom->pos = atom_header;
2124 atom->last = atom_table;
2125
2126 atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t);
2127
2128 if ((uint64_t) (atom_end - ctts_atom->version) > atom_data_size) {
2129 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2130 "\"%s\" mp4 ctts atom too large", mp4->file.name.data);
2131 return NGX_ERROR;
2132 }
2133
2134 data = &trak->ctts_data_buf;
2135 data->temporary = 1;
2136 data->pos = atom_table;
2137 data->last = atom_end;
2138
2139 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = atom;
2140 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = data;
2141
2142 ngx_mp4_atom_next(mp4, atom_data_size);
2143
2144 return NGX_OK;
2145 }
2146
2147
2148 static void
2149 ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
2150 ngx_http_mp4_trak_t *trak)
2151 {
2152 size_t atom_size;
2153 uint32_t entries, count, start_sample;
2154 ngx_buf_t *atom, *data;
2155 ngx_mp4_ctts_atom_t *ctts_atom;
2156 ngx_mp4_ctts_entry_t *entry, *end;
2157
2158 /*
2159 * mdia.minf.stbl.ctts updating requires trak->start_sample
2160 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2161 * atom which may reside after mdia.minf
2162 */
2163
2164 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2165 "mp4 ctts atom update");
2166
2167 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2168
2169 if (data == NULL) {
2170 return;
2171 }
2172
2173 /* sync samples starts from 1 */
2174 start_sample = trak->start_sample + 1;
2175 entries = trak->composition_offset_entries;
2176 entry = (ngx_mp4_ctts_entry_t *) data->pos;
2177 end = (ngx_mp4_ctts_entry_t *) data->last;
2178
2179 while (entry < end) {
2180 count = ngx_mp4_get_32value(entry->count);
2181
2182 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2183 "start:%uD, count:%uD, offset:%uD",
2184 start_sample, count, ngx_mp4_get_32value(entry->offset));
2185
2186 if (start_sample <= count) {
2187 count -= (start_sample - 1);
2188 ngx_mp4_set_32value(entry->count, count);
2189 goto found;
2190 }
2191
2192 start_sample -= count;
2193 entries--;
2194 entry++;
2195 }
2196
2197 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL;
2198 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL;
2199
2200 return;
2201
2202 found:
2203
2204 data->pos = (u_char *) entry;
2205 atom_size = sizeof(ngx_mp4_ctts_atom_t) + (data->last - data->pos);
2206 trak->size += atom_size;
2207
2208 atom = trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf;
2209 ctts_atom = (ngx_mp4_ctts_atom_t *) atom->pos;
2210
2211 ngx_mp4_set_32value(ctts_atom->size, atom_size);
2212 ngx_mp4_set_32value(ctts_atom->entries, entries);
2213
2214 return;
2215 }
2216
2217
2218 typedef struct {
2219 u_char size[4];
2220 u_char name[4];
2221 u_char version[1];
2222 u_char flags[3];
2223 u_char entries[4];
2224 } ngx_mp4_stsc_atom_t;
2225
2226
2227 static ngx_int_t
2228 ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2229 {
2230 u_char *atom_header, *atom_table, *atom_end;
2231 uint32_t entries;
2232 ngx_buf_t *atom, *data;
2233 ngx_mp4_stsc_atom_t *stsc_atom;
2234 ngx_http_mp4_trak_t *trak;
2235
2236 /* sample-to-chunk atom */
2237
2238 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom");
2239
2240 atom_header = ngx_mp4_atom_header(mp4);
2241 stsc_atom = (ngx_mp4_stsc_atom_t *) atom_header;
2242 ngx_mp4_set_atom_name(stsc_atom, 's', 't', 's', 'c');
2243
2244 entries = ngx_mp4_get_32value(stsc_atom->entries);
2245
2246 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2247 "sample-to-chunk entries:%uD", entries);
2248
2249 atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t);
2250 atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
2251
2252 if ((uint64_t) (atom_end - stsc_atom->version) > atom_data_size) {
2253 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2254 "\"%s\" mp4 stsc atom too large",
2255 mp4->file.name.data);
2256 return NGX_ERROR;
2257 }
2258
2259 trak = ngx_mp4_last_trak(mp4);
2260 trak->sample_to_chunk_entries = entries;
2261
2262 atom = &trak->stsc_atom_buf;
2263 atom->temporary = 1;
2264 atom->pos = atom_header;
2265 atom->last = atom_table;
2266
2267 data = &trak->stsc_data_buf;
2268 data->temporary = 1;
2269 data->pos = atom_table;
2270 data->last = atom_end;
2271
2272 trak->out[NGX_HTTP_MP4_STSC_ATOM].buf = atom;
2273 trak->out[NGX_HTTP_MP4_STSC_DATA].buf = data;
2274
2275 ngx_mp4_atom_next(mp4, atom_data_size);
2276
2277 return NGX_OK;
2278 }
2279
2280
2281 static ngx_int_t
2282 ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
2283 ngx_http_mp4_trak_t *trak)
2284 {
2285 size_t atom_size;
2286 uint32_t start_sample, entries, chunk, samples, id,
2287 next_chunk, n;
2288 ngx_buf_t *atom, *data, *buf;
2289 ngx_mp4_stsc_atom_t *stsc_atom;
2290 ngx_mp4_stsc_entry_t *entry, *first, *end;
2291
2292 /*
2293 * mdia.minf.stbl.stsc updating requires trak->start_sample
2294 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2295 * atom which may reside after mdia.minf
2296 */
2297
2298 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2299 "mp4 stsc atom update");
2300
2301 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2302
2303 if (data == NULL) {
2304 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2305 "no mp4 stsc atoms were found in \"%s\"",
2306 mp4->file.name.data);
2307 return NGX_ERROR;
2308 }
2309
2310 start_sample = (uint32_t) trak->start_sample;
2311 entries = trak->sample_to_chunk_entries - 1;
2312
2313 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2314 end = (ngx_mp4_stsc_entry_t *) data->last;
2315
2316 chunk = ngx_mp4_get_32value(entry->chunk);
2317 samples = ngx_mp4_get_32value(entry->samples);
2318 id = ngx_mp4_get_32value(entry->id);
2319 entry++;
2320
2321 while (entry < end) {
2322
2323 next_chunk = ngx_mp4_get_32value(entry->chunk);
2324
2325 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2326 "start_sample:%uD, chunk:%uD, chunks:%uD, "
2327 "samples:%uD, id:%uD",
2328 start_sample, chunk, next_chunk - chunk, samples, id);
2329
2330 n = (next_chunk - chunk) * samples;
2331
2332 if (start_sample <= n) {
2333 goto found;
2334 }
2335
2336 start_sample -= n;
2337
2338 chunk = next_chunk;
2339 samples = ngx_mp4_get_32value(entry->samples);
2340 id = ngx_mp4_get_32value(entry->id);
2341 entries--;
2342 entry++;
2343 }
2344
2345 next_chunk = trak->chunks;
2346
2347 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2348 "start_sample:%uD, chunk:%uD, chunks:%uD, samples:%uD",
2349 start_sample, chunk, next_chunk - chunk, samples);
2350
2351 n = (next_chunk - chunk) * samples;
2352
2353 if (start_sample > n) {
2354 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2355 "start time is out mp4 stsc chunks in \"%s\"",
2356 mp4->file.name.data);
2357 return NGX_ERROR;
2358 }
2359
2360 found:
2361
2362 entries++;
2363 entry--;
2364
2365 if (samples == 0) {
2366 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2367 "zero number of samples in \"%s\"",
2368 mp4->file.name.data);
2369 return NGX_ERROR;
2370 }
2371
2372 trak->start_chunk = chunk - 1;
2373
2374 trak->start_chunk += start_sample / samples;
2375 trak->chunk_samples = start_sample % samples;
2376
2377 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2378 "start chunk:%ui, samples:%uD",
2379 trak->start_chunk, trak->chunk_samples);
2380
2381 data->pos = (u_char *) entry;
2382 atom_size = sizeof(ngx_mp4_stsc_atom_t) + (data->last - data->pos);
2383
2384 if (trak->chunk_samples) {
2385
2386 first = &trak->stsc_chunk_entry;
2387 ngx_mp4_set_32value(first->chunk, 1);
2388 ngx_mp4_set_32value(first->samples, samples - trak->chunk_samples);
2389 ngx_mp4_set_32value(first->id, id);
2390
2391 buf = &trak->stsc_chunk_buf;
2392 buf->temporary = 1;
2393 buf->pos = (u_char *) first;
2394 buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t);
2395
2396 trak->out[NGX_HTTP_MP4_STSC_CHUNK].buf = buf;
2397
2398 ngx_mp4_set_32value(entry->chunk, 2);
2399
2400 atom_size += sizeof(ngx_mp4_stsc_entry_t);
2401 }
2402
2403 while (++entry < end) {
2404 chunk = ngx_mp4_get_32value(entry->chunk);
2405 chunk -= trak->start_chunk;
2406 ngx_mp4_set_32value(entry->chunk, chunk);
2407 }
2408
2409 trak->size += atom_size;
2410
2411 atom = trak->out[NGX_HTTP_MP4_STSC_ATOM].buf;
2412 stsc_atom = (ngx_mp4_stsc_atom_t *) atom->pos;
2413
2414 ngx_mp4_set_32value(stsc_atom->size, atom_size);
2415 ngx_mp4_set_32value(stsc_atom->entries, entries);
2416
2417 return NGX_OK;
2418 }
2419
2420
2421 typedef struct {
2422 u_char size[4];
2423 u_char name[4];
2424 u_char version[1];
2425 u_char flags[3];
2426 u_char uniform_size[4];
2427 u_char entries[4];
2428 } ngx_mp4_stsz_atom_t;
2429
2430
2431 static ngx_int_t
2432 ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2433 {
2434 u_char *atom_header, *atom_table, *atom_end;
2435 size_t atom_size;
2436 uint32_t entries, size;
2437 ngx_buf_t *atom, *data;
2438 ngx_mp4_stsz_atom_t *stsz_atom;
2439 ngx_http_mp4_trak_t *trak;
2440
2441 /* sample sizes atom */
2442
2443 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom");
2444
2445 atom_header = ngx_mp4_atom_header(mp4);
2446 stsz_atom = (ngx_mp4_stsz_atom_t *) atom_header;
2447 ngx_mp4_set_atom_name(stsz_atom, 's', 't', 's', 'z');
2448
2449 size = ngx_mp4_get_32value(stsz_atom->uniform_size);
2450 entries = ngx_mp4_get_32value(stsz_atom->entries);
2451
2452 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2453 "sample uniform size:%uD, entries:%uD", size, entries);
2454
2455 trak = ngx_mp4_last_trak(mp4);
2456 trak->sample_sizes_entries = entries;
2457
2458 atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t);
2459
2460 atom = &trak->stsz_atom_buf;
2461 atom->temporary = 1;
2462 atom->pos = atom_header;
2463 atom->last = atom_table;
2464
2465 trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf = atom;
2466
2467 if (size == 0) {
2468 atom_end = atom_table + entries * sizeof(uint32_t);
2469
2470 if ((uint64_t) (atom_end - stsz_atom->version) > atom_data_size) {
2471 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2472 "\"%s\" mp4 stsz atom too large",
2473 mp4->file.name.data);
2474 return NGX_ERROR;
2475 }
2476
2477 data = &trak->stsz_data_buf;
2478 data->temporary = 1;
2479 data->pos = atom_table;
2480 data->last = atom_end;
2481
2482 trak->out[NGX_HTTP_MP4_STSZ_DATA].buf = data;
2483
2484 } else {
2485 /* if size != 0 then all samples are the same size */
2486 /* TODO : chunk samples */
2487 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
2488 ngx_mp4_set_32value(atom_header, atom_size);
2489 trak->size += atom_size;
2490 }
2491
2492 ngx_mp4_atom_next(mp4, atom_data_size);
2493
2494 return NGX_OK;
2495 }
2496
2497
2498 static void
2499 ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
2500 ngx_http_mp4_trak_t *trak)
2501 {
2502 size_t atom_size;
2503 uint32_t *pos, *end;
2504 ngx_buf_t *atom, *data;
2505 ngx_mp4_stsz_atom_t *stsz_atom;
2506
2507 /*
2508 * mdia.minf.stbl.stsz updating requires trak->start_sample
2509 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2510 * atom which may reside after mdia.minf
2511 */
2512
2513 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2514 "mp4 stsz atom update");
2515
2516 data = trak->out[NGX_HTTP_MP4_STSZ_DATA].buf;
2517
2518 if (data) {
2519 data->pos += trak->start_sample * sizeof(uint32_t);
2520 end = (uint32_t *) data->pos;
2521
2522 for (pos = end - trak->chunk_samples; pos < end; pos++) {
2523 trak->chunk_samples_size += ngx_mp4_get_32value(pos);
2524 }
2525
2526 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2527 "chunk samples sizes:%uL", trak->chunk_samples_size);
2528
2529 atom_size = sizeof(ngx_mp4_stsz_atom_t) + (data->last - data->pos);
2530 trak->size += atom_size;
2531
2532 atom = trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf;
2533 stsz_atom = (ngx_mp4_stsz_atom_t *) atom->pos;
2534
2535 ngx_mp4_set_32value(stsz_atom->size, atom_size);
2536 ngx_mp4_set_32value(stsz_atom->entries,
2537 trak->sample_sizes_entries - trak->start_sample);
2538 }
2539 }
2540
2541
2542 typedef struct {
2543 u_char size[4];
2544 u_char name[4];
2545 u_char version[1];
2546 u_char flags[3];
2547 u_char entries[4];
2548 } ngx_mp4_stco_atom_t;
2549
2550
2551 static ngx_int_t
2552 ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2553 {
2554 u_char *atom_header, *atom_table, *atom_end;
2555 uint32_t entries;
2556 ngx_buf_t *atom, *data;
2557 ngx_mp4_stco_atom_t *stco_atom;
2558 ngx_http_mp4_trak_t *trak;
2559
2560 /* chunk offsets atom */
2561
2562 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom");
2563
2564 atom_header = ngx_mp4_atom_header(mp4);
2565 stco_atom = (ngx_mp4_stco_atom_t *) atom_header;
2566 ngx_mp4_set_atom_name(stco_atom, 's', 't', 'c', 'o');
2567
2568 entries = ngx_mp4_get_32value(stco_atom->entries);
2569
2570 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
2571
2572 atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t);
2573 atom_end = atom_table + entries * sizeof(uint32_t);
2574
2575 if ((uint64_t) (atom_end - stco_atom->version) > atom_data_size) {
2576 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2577 "\"%s\" mp4 stco atom too large", mp4->file.name.data);
2578 return NGX_ERROR;
2579 }
2580
2581 trak = ngx_mp4_last_trak(mp4);
2582 trak->chunks = entries;
2583
2584 atom = &trak->stco_atom_buf;
2585 atom->temporary = 1;
2586 atom->pos = atom_header;
2587 atom->last = atom_table;
2588
2589 data = &trak->stco_data_buf;
2590 data->temporary = 1;
2591 data->pos = atom_table;
2592 data->last = atom_end;
2593
2594 trak->out[NGX_HTTP_MP4_STCO_ATOM].buf = atom;
2595 trak->out[NGX_HTTP_MP4_STCO_DATA].buf = data;
2596
2597 ngx_mp4_atom_next(mp4, atom_data_size);
2598
2599 return NGX_OK;
2600 }
2601
2602
2603 static ngx_int_t
2604 ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
2605 ngx_http_mp4_trak_t *trak)
2606 {
2607 size_t atom_size;
2608 ngx_buf_t *atom, *data;
2609 ngx_mp4_stco_atom_t *stco_atom;
2610
2611 /*
2612 * mdia.minf.stbl.stco updating requires trak->start_chunk
2613 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
2614 * atom which may reside after mdia.minf
2615 */
2616
2617 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2618 "mp4 stco atom update");
2619
2620 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
2621
2622 if (data == NULL) {
2623 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2624 "no mp4 stco atoms were found in \"%s\"",
2625 mp4->file.name.data);
2626 return NGX_ERROR;
2627 }
2628
2629 data->pos += trak->start_chunk * sizeof(uint32_t);
2630 atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos);
2631 trak->size += atom_size;
2632
2633 trak->start_offset = ngx_mp4_get_32value(data->pos);
2634 trak->start_offset += trak->chunk_samples_size;
2635 ngx_mp4_set_32value(data->pos, trak->start_offset);
2636
2637 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2638 "start chunk offset:%uD", trak->start_offset);
2639
2640 atom = trak->out[NGX_HTTP_MP4_STCO_ATOM].buf;
2641 stco_atom = (ngx_mp4_stco_atom_t *) atom->pos;
2642
2643 ngx_mp4_set_32value(stco_atom->size, atom_size);
2644 ngx_mp4_set_32value(stco_atom->entries, trak->chunks - trak->start_chunk);
2645
2646 return NGX_OK;
2647 }
2648
2649
2650 static void
2651 ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
2652 ngx_http_mp4_trak_t *trak, int32_t adjustment)
2653 {
2654 uint32_t offset, *entry, *end;
2655 ngx_buf_t *data;
2656
2657 /*
2658 * moov.trak.mdia.minf.stbl.stco adjustment requires
2659 * minimal start offset of all traks and new moov atom size
2660 */
2661
2662 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2663 "mp4 stco atom adjustment");
2664
2665 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
2666 entry = (uint32_t *) data->pos;
2667 end = (uint32_t *) data->last;
2668
2669 while (entry < end) {
2670 offset = ngx_mp4_get_32value(entry);
2671 offset += adjustment;
2672 ngx_mp4_set_32value(entry, offset);
2673 entry++;
2674 }
2675 }
2676
2677
2678 typedef struct {
2679 u_char size[4];
2680 u_char name[4];
2681 u_char version[1];
2682 u_char flags[3];
2683 u_char entries[4];
2684 } ngx_mp4_co64_atom_t;
2685
2686
2687 static ngx_int_t
2688 ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2689 {
2690 u_char *atom_header, *atom_table, *atom_end;
2691 uint32_t entries;
2692 ngx_buf_t *atom, *data;
2693 ngx_mp4_co64_atom_t *co64_atom;
2694 ngx_http_mp4_trak_t *trak;
2695
2696 /* chunk offsets atom */
2697
2698 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom");
2699
2700 atom_header = ngx_mp4_atom_header(mp4);
2701 co64_atom = (ngx_mp4_co64_atom_t *) atom_header;
2702 ngx_mp4_set_atom_name(co64_atom, 'c', 'o', '6', '4');
2703
2704 entries = ngx_mp4_get_32value(co64_atom->entries);
2705
2706 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
2707
2708 atom_table = atom_header + sizeof(ngx_mp4_co64_atom_t);
2709 atom_end = atom_table + entries * sizeof(uint64_t);
2710
2711 if ((uint64_t) (atom_end - co64_atom->version) > atom_data_size) {
2712 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2713 "\"%s\" mp4 co64 atom too large", mp4->file.name.data);
2714 return NGX_ERROR;
2715 }
2716
2717 trak = ngx_mp4_last_trak(mp4);
2718 trak->chunks = entries;
2719
2720 atom = &trak->co64_atom_buf;
2721 atom->temporary = 1;
2722 atom->pos = atom_header;
2723 atom->last = atom_table;
2724
2725 data = &trak->co64_data_buf;
2726 data->temporary = 1;
2727 data->pos = atom_table;
2728 data->last = atom_end;
2729
2730 trak->out[NGX_HTTP_MP4_CO64_ATOM].buf = atom;
2731 trak->out[NGX_HTTP_MP4_CO64_DATA].buf = data;
2732
2733 ngx_mp4_atom_next(mp4, atom_data_size);
2734
2735 return NGX_OK;
2736 }
2737
2738
2739 static ngx_int_t
2740 ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4,
2741 ngx_http_mp4_trak_t *trak)
2742 {
2743 size_t atom_size;
2744 ngx_buf_t *atom, *data;
2745 ngx_mp4_co64_atom_t *co64_atom;
2746
2747 /*
2748 * mdia.minf.stbl.co64 updating requires trak->start_chunk
2749 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
2750 * atom which may reside after mdia.minf
2751 */
2752
2753 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2754 "mp4 co64 atom update");
2755
2756 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
2757
2758 if (data == NULL) {
2759 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2760 "no mp4 co64 atoms were found in \"%s\"",
2761 mp4->file.name.data);
2762 return NGX_ERROR;
2763 }
2764
2765 data->pos += trak->start_chunk * sizeof(uint64_t);
2766 atom_size = sizeof(ngx_mp4_co64_atom_t) + (data->last - data->pos);
2767 trak->size += atom_size;
2768
2769 trak->start_offset = ngx_mp4_get_64value(data->pos);
2770 trak->start_offset += trak->chunk_samples_size;
2771 ngx_mp4_set_64value(data->pos, trak->start_offset);
2772
2773 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2774 "start chunk offset:%uL", trak->start_offset);
2775
2776 atom = trak->out[NGX_HTTP_MP4_CO64_ATOM].buf;
2777 co64_atom = (ngx_mp4_co64_atom_t *) atom->pos;
2778
2779 ngx_mp4_set_32value(co64_atom->size, atom_size);
2780 ngx_mp4_set_32value(co64_atom->entries, trak->chunks - trak->start_chunk);
2781
2782 return NGX_OK;
2783 }
2784
2785
2786 static void
2787 ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4,
2788 ngx_http_mp4_trak_t *trak, off_t adjustment)
2789 {
2790 uint64_t offset, *entry, *end;
2791 ngx_buf_t *data;
2792
2793 /*
2794 * moov.trak.mdia.minf.stbl.co64 adjustment requires
2795 * minimal start offset of all traks and new moov atom size
2796 */
2797
2798 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2799 "mp4 co64 atom adjustment");
2800
2801 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
2802 entry = (uint64_t *) data->pos;
2803 end = (uint64_t *) data->last;
2804
2805 while (entry < end) {
2806 offset = ngx_mp4_get_64value(entry);
2807 offset += adjustment;
2808 ngx_mp4_set_64value(entry, offset);
2809 entry++;
2810 }
2811 }
2812
2813
2814 static char *
2815 ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
2816 {
2817 ngx_http_core_loc_conf_t *clcf;
2818
2819 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
2820 clcf->handler = ngx_http_mp4_handler;
2821
2822 return NGX_CONF_OK;
2823 }
2824
2825
2826 static void *
2827 ngx_http_mp4_create_conf(ngx_conf_t *cf)
2828 {
2829 ngx_http_mp4_conf_t *conf;
2830
2831 conf = ngx_palloc(cf->pool, sizeof(ngx_http_mp4_conf_t));
2832 if (conf == NULL) {
2833 return NULL;
2834 }
2835
2836 conf->buffer_size = NGX_CONF_UNSET_SIZE;
2837 conf->max_buffer_size = NGX_CONF_UNSET_SIZE;
2838
2839 return conf;
2840 }
2841
2842
2843 static char *
2844 ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child)
2845 {
2846 ngx_http_mp4_conf_t *prev = parent;
2847 ngx_http_mp4_conf_t *conf = child;
2848
2849 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, 512 * 1024);
2850 ngx_conf_merge_size_value(conf->max_buffer_size, prev->max_buffer_size,
2851 10 * 1024 * 1024);
2852
2853 return NGX_CONF_OK;
2854 }