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 return NGX_DECLINED;
525 }
526
527 r->root_tested = !r->error_page;
528 r->allow_ranges = 1;
529
530 start = -1;
531 length = 0;
532 r->headers_out.content_length_n = of.size;
533 mp4 = NULL;
534 b = NULL;
535
536 if (r->args.len) {
537
538 if (ngx_http_arg(r, (u_char *) "start", 5, &value) == NGX_OK) {
539
540 /*
541 * A Flash player may send start value with a lot of digits
542 * after dot so a custom function is used instead of ngx_atofp().
543 */
544
545 start = ngx_http_mp4_atofp(value.data, value.len, 3);
546 }
547
548 if (ngx_http_arg(r, (u_char *) "end", 3, &value) == NGX_OK) {
549
550 end = ngx_http_mp4_atofp(value.data, value.len, 3);
551
552 if (end > 0) {
553 if (start < 0) {
554 start = 0;
555 }
556
557 if (end > start) {
558 length = end - start;
559 }
560 }
561 }
562 }
563
564 if (start >= 0) {
565 r->single_range = 1;
566
567 mp4 = ngx_pcalloc(r->pool, sizeof(ngx_http_mp4_file_t));
568 if (mp4 == NULL) {
569 return NGX_HTTP_INTERNAL_SERVER_ERROR;
570 }
571
572 mp4->file.fd = of.fd;
573 mp4->file.name = path;
574 mp4->file.log = r->connection->log;
575 mp4->end = of.size;
576 mp4->start = (ngx_uint_t) start;
577 mp4->length = length;
578 mp4->request = r;
579
580 switch (ngx_http_mp4_process(mp4)) {
581
582 case NGX_DECLINED:
583 if (mp4->buffer) {
584 ngx_pfree(r->pool, mp4->buffer);
585 }
586
587 ngx_pfree(r->pool, mp4);
588 mp4 = NULL;
589
590 break;
591
592 case NGX_OK:
593 r->headers_out.content_length_n = mp4->content_length;
594 break;
595
596 default: /* NGX_ERROR */
597 if (mp4->buffer) {
598 ngx_pfree(r->pool, mp4->buffer);
599 }
600
601 ngx_pfree(r->pool, mp4);
602
603 return NGX_HTTP_INTERNAL_SERVER_ERROR;
604 }
605 }
606
607 log->action = "sending mp4 to client";
608
609 if (clcf->directio <= of.size) {
610
611 /*
612 * DIRECTIO is set on transfer only
613 * to allow kernel to cache "moov" atom
614 */
615
616 if (ngx_directio_on(of.fd) == NGX_FILE_ERROR) {
617 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
618 ngx_directio_on_n " \"%s\" failed", path.data);
619 }
620
621 of.is_directio = 1;
622
623 if (mp4) {
624 mp4->file.directio = 1;
625 }
626 }
627
628 r->headers_out.status = NGX_HTTP_OK;
629 r->headers_out.last_modified_time = of.mtime;
630
631 if (ngx_http_set_etag(r) != NGX_OK) {
632 return NGX_HTTP_INTERNAL_SERVER_ERROR;
633 }
634
635 if (ngx_http_set_content_type(r) != NGX_OK) {
636 return NGX_HTTP_INTERNAL_SERVER_ERROR;
637 }
638
639 if (mp4 == NULL) {
640 b = ngx_calloc_buf(r->pool);
641 if (b == NULL) {
642 return NGX_HTTP_INTERNAL_SERVER_ERROR;
643 }
644
645 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
646 if (b->file == NULL) {
647 return NGX_HTTP_INTERNAL_SERVER_ERROR;
648 }
649 }
650
651 rc = ngx_http_send_header(r);
652
653 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
654 return rc;
655 }
656
657 if (mp4) {
658 return ngx_http_output_filter(r, mp4->out);
659 }
660
661 b->file_pos = 0;
662 b->file_last = of.size;
663
664 b->in_file = b->file_last ? 1 : 0;
665 b->last_buf = (r == r->main) ? 1 : 0;
666 b->last_in_chain = 1;
667
668 b->file->fd = of.fd;
669 b->file->name = path;
670 b->file->log = log;
671 b->file->directio = of.is_directio;
672
673 out.buf = b;
674 out.next = NULL;
675
676 return ngx_http_output_filter(r, &out);
677 }
678
679
680 static ngx_int_t
ngx_http_mp4_atofp(u_char * line,size_t n,size_t point)681 ngx_http_mp4_atofp(u_char *line, size_t n, size_t point)
682 {
683 ngx_int_t value, cutoff, cutlim;
684 ngx_uint_t dot;
685
686 /* same as ngx_atofp(), but allows additional digits */
687
688 if (n == 0) {
689 return NGX_ERROR;
690 }
691
692 cutoff = NGX_MAX_INT_T_VALUE / 10;
693 cutlim = NGX_MAX_INT_T_VALUE % 10;
694
695 dot = 0;
696
697 for (value = 0; n--; line++) {
698
699 if (*line == '.') {
700 if (dot) {
701 return NGX_ERROR;
702 }
703
704 dot = 1;
705 continue;
706 }
707
708 if (*line < '0' || *line > '9') {
709 return NGX_ERROR;
710 }
711
712 if (point == 0) {
713 continue;
714 }
715
716 if (value >= cutoff && (value > cutoff || *line - '0' > cutlim)) {
717 return NGX_ERROR;
718 }
719
720 value = value * 10 + (*line - '0');
721 point -= dot;
722 }
723
724 while (point--) {
725 if (value > cutoff) {
726 return NGX_ERROR;
727 }
728
729 value = value * 10;
730 }
731
732 return value;
733 }
734
735
736 static ngx_int_t
ngx_http_mp4_process(ngx_http_mp4_file_t * mp4)737 ngx_http_mp4_process(ngx_http_mp4_file_t *mp4)
738 {
739 off_t start_offset, end_offset, adjustment;
740 ngx_int_t rc;
741 ngx_uint_t i, j;
742 ngx_chain_t **prev;
743 ngx_http_mp4_trak_t *trak;
744 ngx_http_mp4_conf_t *conf;
745
746 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
747 "mp4 start:%ui, length:%ui", mp4->start, mp4->length);
748
749 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
750
751 mp4->buffer_size = conf->buffer_size;
752
753 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_atoms, mp4->end);
754 if (rc != NGX_OK) {
755 return rc;
756 }
757
758 if (mp4->trak.nelts == 0) {
759 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
760 "no mp4 trak atoms were found in \"%s\"",
761 mp4->file.name.data);
762 return NGX_ERROR;
763 }
764
765 if (mp4->mdat_atom.buf == NULL) {
766 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
767 "no mp4 mdat atom was found in \"%s\"",
768 mp4->file.name.data);
769 return NGX_ERROR;
770 }
771
772 prev = &mp4->out;
773
774 if (mp4->ftyp_atom.buf) {
775 *prev = &mp4->ftyp_atom;
776 prev = &mp4->ftyp_atom.next;
777 }
778
779 *prev = &mp4->moov_atom;
780 prev = &mp4->moov_atom.next;
781
782 if (mp4->mvhd_atom.buf) {
783 mp4->moov_size += mp4->mvhd_atom_buf.last - mp4->mvhd_atom_buf.pos;
784 *prev = &mp4->mvhd_atom;
785 prev = &mp4->mvhd_atom.next;
786 }
787
788 start_offset = mp4->end;
789 end_offset = 0;
790 trak = mp4->trak.elts;
791
792 for (i = 0; i < mp4->trak.nelts; i++) {
793
794 if (ngx_http_mp4_update_stts_atom(mp4, &trak[i]) != NGX_OK) {
795 return NGX_ERROR;
796 }
797
798 if (ngx_http_mp4_update_stss_atom(mp4, &trak[i]) != NGX_OK) {
799 return NGX_ERROR;
800 }
801
802 ngx_http_mp4_update_ctts_atom(mp4, &trak[i]);
803
804 if (ngx_http_mp4_update_stsc_atom(mp4, &trak[i]) != NGX_OK) {
805 return NGX_ERROR;
806 }
807
808 if (ngx_http_mp4_update_stsz_atom(mp4, &trak[i]) != NGX_OK) {
809 return NGX_ERROR;
810 }
811
812 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
813 if (ngx_http_mp4_update_co64_atom(mp4, &trak[i]) != NGX_OK) {
814 return NGX_ERROR;
815 }
816
817 } else {
818 if (ngx_http_mp4_update_stco_atom(mp4, &trak[i]) != NGX_OK) {
819 return NGX_ERROR;
820 }
821 }
822
823 ngx_http_mp4_update_stbl_atom(mp4, &trak[i]);
824 ngx_http_mp4_update_minf_atom(mp4, &trak[i]);
825 trak[i].size += trak[i].mdhd_size;
826 trak[i].size += trak[i].hdlr_size;
827 ngx_http_mp4_update_mdia_atom(mp4, &trak[i]);
828 trak[i].size += trak[i].tkhd_size;
829 ngx_http_mp4_update_trak_atom(mp4, &trak[i]);
830
831 mp4->moov_size += trak[i].size;
832
833 if (start_offset > trak[i].start_offset) {
834 start_offset = trak[i].start_offset;
835 }
836
837 if (end_offset < trak[i].end_offset) {
838 end_offset = trak[i].end_offset;
839 }
840
841 *prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM];
842 prev = &trak[i].out[NGX_HTTP_MP4_TRAK_ATOM].next;
843
844 for (j = 0; j < NGX_HTTP_MP4_LAST_ATOM + 1; j++) {
845 if (trak[i].out[j].buf) {
846 *prev = &trak[i].out[j];
847 prev = &trak[i].out[j].next;
848 }
849 }
850 }
851
852 if (end_offset < start_offset) {
853 end_offset = start_offset;
854 }
855
856 mp4->moov_size += 8;
857
858 ngx_mp4_set_32value(mp4->moov_atom_header, mp4->moov_size);
859 ngx_mp4_set_atom_name(mp4->moov_atom_header, 'm', 'o', 'o', 'v');
860 mp4->content_length += mp4->moov_size;
861
862 *prev = &mp4->mdat_atom;
863
864 if (start_offset > mp4->mdat_data.buf->file_last) {
865 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
866 "start time is out mp4 mdat atom in \"%s\"",
867 mp4->file.name.data);
868 return NGX_ERROR;
869 }
870
871 adjustment = mp4->ftyp_size + mp4->moov_size
872 + ngx_http_mp4_update_mdat_atom(mp4, start_offset, end_offset)
873 - start_offset;
874
875 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
876 "mp4 adjustment:%O", adjustment);
877
878 for (i = 0; i < mp4->trak.nelts; i++) {
879 if (trak[i].out[NGX_HTTP_MP4_CO64_DATA].buf) {
880 ngx_http_mp4_adjust_co64_atom(mp4, &trak[i], adjustment);
881 } else {
882 ngx_http_mp4_adjust_stco_atom(mp4, &trak[i], (int32_t) adjustment);
883 }
884 }
885
886 return NGX_OK;
887 }
888
889
890 typedef struct {
891 u_char size[4];
892 u_char name[4];
893 } ngx_mp4_atom_header_t;
894
895 typedef struct {
896 u_char size[4];
897 u_char name[4];
898 u_char size64[8];
899 } ngx_mp4_atom_header64_t;
900
901
902 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)903 ngx_http_mp4_read_atom(ngx_http_mp4_file_t *mp4,
904 ngx_http_mp4_atom_handler_t *atom, uint64_t atom_data_size)
905 {
906 off_t end;
907 size_t atom_header_size;
908 u_char *atom_header, *atom_name;
909 uint64_t atom_size;
910 ngx_int_t rc;
911 ngx_uint_t n;
912
913 end = mp4->offset + atom_data_size;
914
915 while (mp4->offset < end) {
916
917 if (ngx_http_mp4_read(mp4, sizeof(uint32_t)) != NGX_OK) {
918 return NGX_ERROR;
919 }
920
921 atom_header = mp4->buffer_pos;
922 atom_size = ngx_mp4_get_32value(atom_header);
923 atom_header_size = sizeof(ngx_mp4_atom_header_t);
924
925 if (atom_size == 0) {
926 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
927 "mp4 atom end");
928 return NGX_OK;
929 }
930
931 if (atom_size < sizeof(ngx_mp4_atom_header_t)) {
932
933 if (atom_size == 1) {
934
935 if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header64_t))
936 != NGX_OK)
937 {
938 return NGX_ERROR;
939 }
940
941 /* 64-bit atom size */
942 atom_header = mp4->buffer_pos;
943 atom_size = ngx_mp4_get_64value(atom_header + 8);
944 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
945
946 if (atom_size < sizeof(ngx_mp4_atom_header64_t)) {
947 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
948 "\"%s\" mp4 atom is too small:%uL",
949 mp4->file.name.data, atom_size);
950 return NGX_ERROR;
951 }
952
953 } else {
954 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
955 "\"%s\" mp4 atom is too small:%uL",
956 mp4->file.name.data, atom_size);
957 return NGX_ERROR;
958 }
959 }
960
961 if (ngx_http_mp4_read(mp4, sizeof(ngx_mp4_atom_header_t)) != NGX_OK) {
962 return NGX_ERROR;
963 }
964
965 atom_header = mp4->buffer_pos;
966 atom_name = atom_header + sizeof(uint32_t);
967
968 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
969 "mp4 atom: %*s @%O:%uL",
970 (size_t) 4, atom_name, mp4->offset, atom_size);
971
972 if (atom_size > (uint64_t) (NGX_MAX_OFF_T_VALUE - mp4->offset)
973 || mp4->offset + (off_t) atom_size > end)
974 {
975 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
976 "\"%s\" mp4 atom too large:%uL",
977 mp4->file.name.data, atom_size);
978 return NGX_ERROR;
979 }
980
981 for (n = 0; atom[n].name; n++) {
982
983 if (ngx_strncmp(atom_name, atom[n].name, 4) == 0) {
984
985 ngx_mp4_atom_next(mp4, atom_header_size);
986
987 rc = atom[n].handler(mp4, atom_size - atom_header_size);
988 if (rc != NGX_OK) {
989 return rc;
990 }
991
992 goto next;
993 }
994 }
995
996 ngx_mp4_atom_next(mp4, atom_size);
997
998 next:
999 continue;
1000 }
1001
1002 return NGX_OK;
1003 }
1004
1005
1006 static ngx_int_t
ngx_http_mp4_read(ngx_http_mp4_file_t * mp4,size_t size)1007 ngx_http_mp4_read(ngx_http_mp4_file_t *mp4, size_t size)
1008 {
1009 ssize_t n;
1010
1011 if (mp4->buffer_pos + size <= mp4->buffer_end) {
1012 return NGX_OK;
1013 }
1014
1015 if (mp4->offset + (off_t) mp4->buffer_size > mp4->end) {
1016 mp4->buffer_size = (size_t) (mp4->end - mp4->offset);
1017 }
1018
1019 if (mp4->buffer_size < size) {
1020 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1021 "\"%s\" mp4 file truncated", mp4->file.name.data);
1022 return NGX_ERROR;
1023 }
1024
1025 if (mp4->buffer == NULL) {
1026 mp4->buffer = ngx_palloc(mp4->request->pool, mp4->buffer_size);
1027 if (mp4->buffer == NULL) {
1028 return NGX_ERROR;
1029 }
1030
1031 mp4->buffer_start = mp4->buffer;
1032 }
1033
1034 n = ngx_read_file(&mp4->file, mp4->buffer_start, mp4->buffer_size,
1035 mp4->offset);
1036
1037 if (n == NGX_ERROR) {
1038 return NGX_ERROR;
1039 }
1040
1041 if ((size_t) n != mp4->buffer_size) {
1042 ngx_log_error(NGX_LOG_CRIT, mp4->file.log, 0,
1043 ngx_read_file_n " read only %z of %z from \"%s\"",
1044 n, mp4->buffer_size, mp4->file.name.data);
1045 return NGX_ERROR;
1046 }
1047
1048 mp4->buffer_pos = mp4->buffer_start;
1049 mp4->buffer_end = mp4->buffer_start + mp4->buffer_size;
1050
1051 return NGX_OK;
1052 }
1053
1054
1055 static ngx_int_t
ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1056 ngx_http_mp4_read_ftyp_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1057 {
1058 u_char *ftyp_atom;
1059 size_t atom_size;
1060 ngx_buf_t *atom;
1061
1062 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ftyp atom");
1063
1064 if (atom_data_size > 1024
1065 || ngx_mp4_atom_data(mp4) + (size_t) atom_data_size > mp4->buffer_end)
1066 {
1067 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1068 "\"%s\" mp4 ftyp atom is too large:%uL",
1069 mp4->file.name.data, atom_data_size);
1070 return NGX_ERROR;
1071 }
1072
1073 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1074
1075 ftyp_atom = ngx_palloc(mp4->request->pool, atom_size);
1076 if (ftyp_atom == NULL) {
1077 return NGX_ERROR;
1078 }
1079
1080 ngx_mp4_set_32value(ftyp_atom, atom_size);
1081 ngx_mp4_set_atom_name(ftyp_atom, 'f', 't', 'y', 'p');
1082
1083 /*
1084 * only moov atom content is guaranteed to be in mp4->buffer
1085 * during sending response, so ftyp atom content should be copied
1086 */
1087 ngx_memcpy(ftyp_atom + sizeof(ngx_mp4_atom_header_t),
1088 ngx_mp4_atom_data(mp4), (size_t) atom_data_size);
1089
1090 atom = &mp4->ftyp_atom_buf;
1091 atom->temporary = 1;
1092 atom->pos = ftyp_atom;
1093 atom->last = ftyp_atom + atom_size;
1094
1095 mp4->ftyp_atom.buf = atom;
1096 mp4->ftyp_size = atom_size;
1097 mp4->content_length = atom_size;
1098
1099 ngx_mp4_atom_next(mp4, atom_data_size);
1100
1101 return NGX_OK;
1102 }
1103
1104
1105 /*
1106 * Small excess buffer to process atoms after moov atom, mp4->buffer_start
1107 * will be set to this buffer part after moov atom processing.
1108 */
1109 #define NGX_HTTP_MP4_MOOV_BUFFER_EXCESS (4 * 1024)
1110
1111 static ngx_int_t
ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1112 ngx_http_mp4_read_moov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1113 {
1114 ngx_int_t rc;
1115 ngx_uint_t no_mdat;
1116 ngx_buf_t *atom;
1117 ngx_http_mp4_conf_t *conf;
1118
1119 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom");
1120
1121 no_mdat = (mp4->mdat_atom.buf == NULL);
1122
1123 if (no_mdat && mp4->start == 0 && mp4->length == 0) {
1124 /*
1125 * send original file if moov atom resides before
1126 * mdat atom and client requests integral file
1127 */
1128 return NGX_DECLINED;
1129 }
1130
1131 conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
1132
1133 if (atom_data_size > mp4->buffer_size) {
1134
1135 if (atom_data_size > conf->max_buffer_size) {
1136 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1137 "\"%s\" mp4 moov atom is too large:%uL, "
1138 "you may want to increase mp4_max_buffer_size",
1139 mp4->file.name.data, atom_data_size);
1140 return NGX_ERROR;
1141 }
1142
1143 ngx_pfree(mp4->request->pool, mp4->buffer);
1144 mp4->buffer = NULL;
1145 mp4->buffer_pos = NULL;
1146 mp4->buffer_end = NULL;
1147
1148 mp4->buffer_size = (size_t) atom_data_size
1149 + NGX_HTTP_MP4_MOOV_BUFFER_EXCESS * no_mdat;
1150 }
1151
1152 if (ngx_http_mp4_read(mp4, (size_t) atom_data_size) != NGX_OK) {
1153 return NGX_ERROR;
1154 }
1155
1156 mp4->trak.elts = &mp4->traks;
1157 mp4->trak.size = sizeof(ngx_http_mp4_trak_t);
1158 mp4->trak.nalloc = 2;
1159 mp4->trak.pool = mp4->request->pool;
1160
1161 atom = &mp4->moov_atom_buf;
1162 atom->temporary = 1;
1163 atom->pos = mp4->moov_atom_header;
1164 atom->last = mp4->moov_atom_header + 8;
1165
1166 mp4->moov_atom.buf = &mp4->moov_atom_buf;
1167
1168 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_moov_atoms, atom_data_size);
1169
1170 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 moov atom done");
1171
1172 if (no_mdat) {
1173 mp4->buffer_start = mp4->buffer_pos;
1174 mp4->buffer_size = NGX_HTTP_MP4_MOOV_BUFFER_EXCESS;
1175
1176 if (mp4->buffer_start + mp4->buffer_size > mp4->buffer_end) {
1177 mp4->buffer = NULL;
1178 mp4->buffer_pos = NULL;
1179 mp4->buffer_end = NULL;
1180 }
1181
1182 } else {
1183 /* skip atoms after moov atom */
1184 mp4->offset = mp4->end;
1185 }
1186
1187 return rc;
1188 }
1189
1190
1191 static ngx_int_t
ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1192 ngx_http_mp4_read_mdat_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1193 {
1194 ngx_buf_t *data;
1195
1196 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom");
1197
1198 data = &mp4->mdat_data_buf;
1199 data->file = &mp4->file;
1200 data->in_file = 1;
1201 data->last_buf = (mp4->request == mp4->request->main) ? 1 : 0;
1202 data->last_in_chain = 1;
1203 data->file_last = mp4->offset + atom_data_size;
1204
1205 mp4->mdat_atom.buf = &mp4->mdat_atom_buf;
1206 mp4->mdat_atom.next = &mp4->mdat_data;
1207 mp4->mdat_data.buf = data;
1208
1209 if (mp4->trak.nelts) {
1210 /* skip atoms after mdat atom */
1211 mp4->offset = mp4->end;
1212
1213 } else {
1214 ngx_mp4_atom_next(mp4, atom_data_size);
1215 }
1216
1217 return NGX_OK;
1218 }
1219
1220
1221 static size_t
ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t * mp4,off_t start_offset,off_t end_offset)1222 ngx_http_mp4_update_mdat_atom(ngx_http_mp4_file_t *mp4, off_t start_offset,
1223 off_t end_offset)
1224 {
1225 off_t atom_data_size;
1226 u_char *atom_header;
1227 uint32_t atom_header_size;
1228 uint64_t atom_size;
1229 ngx_buf_t *atom;
1230
1231 atom_data_size = end_offset - start_offset;
1232 mp4->mdat_data.buf->file_pos = start_offset;
1233 mp4->mdat_data.buf->file_last = end_offset;
1234
1235 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1236 "mdat new offset @%O:%O", start_offset, atom_data_size);
1237
1238 atom_header = mp4->mdat_atom_header;
1239
1240 if ((uint64_t) atom_data_size
1241 > (uint64_t) 0xffffffff - sizeof(ngx_mp4_atom_header_t))
1242 {
1243 atom_size = 1;
1244 atom_header_size = sizeof(ngx_mp4_atom_header64_t);
1245 ngx_mp4_set_64value(atom_header + sizeof(ngx_mp4_atom_header_t),
1246 sizeof(ngx_mp4_atom_header64_t) + atom_data_size);
1247 } else {
1248 atom_size = sizeof(ngx_mp4_atom_header_t) + atom_data_size;
1249 atom_header_size = sizeof(ngx_mp4_atom_header_t);
1250 }
1251
1252 mp4->content_length += atom_header_size + atom_data_size;
1253
1254 ngx_mp4_set_32value(atom_header, atom_size);
1255 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'a', 't');
1256
1257 atom = &mp4->mdat_atom_buf;
1258 atom->temporary = 1;
1259 atom->pos = atom_header;
1260 atom->last = atom_header + atom_header_size;
1261
1262 return atom_header_size;
1263 }
1264
1265
1266 typedef struct {
1267 u_char size[4];
1268 u_char name[4];
1269 u_char version[1];
1270 u_char flags[3];
1271 u_char creation_time[4];
1272 u_char modification_time[4];
1273 u_char timescale[4];
1274 u_char duration[4];
1275 u_char rate[4];
1276 u_char volume[2];
1277 u_char reserved[10];
1278 u_char matrix[36];
1279 u_char preview_time[4];
1280 u_char preview_duration[4];
1281 u_char poster_time[4];
1282 u_char selection_time[4];
1283 u_char selection_duration[4];
1284 u_char current_time[4];
1285 u_char next_track_id[4];
1286 } ngx_mp4_mvhd_atom_t;
1287
1288 typedef struct {
1289 u_char size[4];
1290 u_char name[4];
1291 u_char version[1];
1292 u_char flags[3];
1293 u_char creation_time[8];
1294 u_char modification_time[8];
1295 u_char timescale[4];
1296 u_char duration[8];
1297 u_char rate[4];
1298 u_char volume[2];
1299 u_char reserved[10];
1300 u_char matrix[36];
1301 u_char preview_time[4];
1302 u_char preview_duration[4];
1303 u_char poster_time[4];
1304 u_char selection_time[4];
1305 u_char selection_duration[4];
1306 u_char current_time[4];
1307 u_char next_track_id[4];
1308 } ngx_mp4_mvhd64_atom_t;
1309
1310
1311 static ngx_int_t
ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1312 ngx_http_mp4_read_mvhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1313 {
1314 u_char *atom_header;
1315 size_t atom_size;
1316 uint32_t timescale;
1317 uint64_t duration, start_time, length_time;
1318 ngx_buf_t *atom;
1319 ngx_mp4_mvhd_atom_t *mvhd_atom;
1320 ngx_mp4_mvhd64_atom_t *mvhd64_atom;
1321
1322 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom");
1323
1324 atom_header = ngx_mp4_atom_header(mp4);
1325 mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header;
1326 mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header;
1327 ngx_mp4_set_atom_name(atom_header, 'm', 'v', 'h', 'd');
1328
1329 if (ngx_mp4_atom_data_size(ngx_mp4_mvhd_atom_t) > atom_data_size) {
1330 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1331 "\"%s\" mp4 mvhd atom too small", mp4->file.name.data);
1332 return NGX_ERROR;
1333 }
1334
1335 if (mvhd_atom->version[0] == 0) {
1336 /* version 0: 32-bit duration */
1337 timescale = ngx_mp4_get_32value(mvhd_atom->timescale);
1338 duration = ngx_mp4_get_32value(mvhd_atom->duration);
1339
1340 } else {
1341 /* version 1: 64-bit duration */
1342
1343 if (ngx_mp4_atom_data_size(ngx_mp4_mvhd64_atom_t) > atom_data_size) {
1344 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1345 "\"%s\" mp4 mvhd atom too small",
1346 mp4->file.name.data);
1347 return NGX_ERROR;
1348 }
1349
1350 timescale = ngx_mp4_get_32value(mvhd64_atom->timescale);
1351 duration = ngx_mp4_get_64value(mvhd64_atom->duration);
1352 }
1353
1354 mp4->timescale = timescale;
1355
1356 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1357 "mvhd timescale:%uD, duration:%uL, time:%.3fs",
1358 timescale, duration, (double) duration / timescale);
1359
1360 start_time = (uint64_t) mp4->start * timescale / 1000;
1361
1362 if (duration < start_time) {
1363 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1364 "\"%s\" mp4 start time exceeds file duration",
1365 mp4->file.name.data);
1366 return NGX_ERROR;
1367 }
1368
1369 duration -= start_time;
1370
1371 if (mp4->length) {
1372 length_time = (uint64_t) mp4->length * timescale / 1000;
1373
1374 if (duration > length_time) {
1375 duration = length_time;
1376 }
1377 }
1378
1379 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1380 "mvhd new duration:%uL, time:%.3fs",
1381 duration, (double) duration / timescale);
1382
1383 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1384 ngx_mp4_set_32value(mvhd_atom->size, atom_size);
1385
1386 if (mvhd_atom->version[0] == 0) {
1387 ngx_mp4_set_32value(mvhd_atom->duration, duration);
1388
1389 } else {
1390 ngx_mp4_set_64value(mvhd64_atom->duration, duration);
1391 }
1392
1393 atom = &mp4->mvhd_atom_buf;
1394 atom->temporary = 1;
1395 atom->pos = atom_header;
1396 atom->last = atom_header + atom_size;
1397
1398 mp4->mvhd_atom.buf = atom;
1399
1400 ngx_mp4_atom_next(mp4, atom_data_size);
1401
1402 return NGX_OK;
1403 }
1404
1405
1406 static ngx_int_t
ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1407 ngx_http_mp4_read_trak_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1408 {
1409 u_char *atom_header, *atom_end;
1410 off_t atom_file_end;
1411 ngx_int_t rc;
1412 ngx_buf_t *atom;
1413 ngx_http_mp4_trak_t *trak;
1414
1415 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 trak atom");
1416
1417 trak = ngx_array_push(&mp4->trak);
1418 if (trak == NULL) {
1419 return NGX_ERROR;
1420 }
1421
1422 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1423
1424 atom_header = ngx_mp4_atom_header(mp4);
1425 ngx_mp4_set_atom_name(atom_header, 't', 'r', 'a', 'k');
1426
1427 atom = &trak->trak_atom_buf;
1428 atom->temporary = 1;
1429 atom->pos = atom_header;
1430 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1431
1432 trak->out[NGX_HTTP_MP4_TRAK_ATOM].buf = atom;
1433
1434 atom_end = mp4->buffer_pos + (size_t) atom_data_size;
1435 atom_file_end = mp4->offset + atom_data_size;
1436
1437 rc = ngx_http_mp4_read_atom(mp4, ngx_http_mp4_trak_atoms, atom_data_size);
1438
1439 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1440 "mp4 trak atom: %i", rc);
1441
1442 if (rc == NGX_DECLINED) {
1443 /* skip this trak */
1444 ngx_memzero(trak, sizeof(ngx_http_mp4_trak_t));
1445 mp4->trak.nelts--;
1446 mp4->buffer_pos = atom_end;
1447 mp4->offset = atom_file_end;
1448 return NGX_OK;
1449 }
1450
1451 return rc;
1452 }
1453
1454
1455 static void
ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1456 ngx_http_mp4_update_trak_atom(ngx_http_mp4_file_t *mp4,
1457 ngx_http_mp4_trak_t *trak)
1458 {
1459 ngx_buf_t *atom;
1460
1461 trak->size += sizeof(ngx_mp4_atom_header_t);
1462 atom = &trak->trak_atom_buf;
1463 ngx_mp4_set_32value(atom->pos, trak->size);
1464 }
1465
1466
1467 static ngx_int_t
ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1468 ngx_http_mp4_read_cmov_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1469 {
1470 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1471 "\"%s\" mp4 compressed moov atom (cmov) is not supported",
1472 mp4->file.name.data);
1473
1474 return NGX_ERROR;
1475 }
1476
1477
1478 typedef struct {
1479 u_char size[4];
1480 u_char name[4];
1481 u_char version[1];
1482 u_char flags[3];
1483 u_char creation_time[4];
1484 u_char modification_time[4];
1485 u_char track_id[4];
1486 u_char reserved1[4];
1487 u_char duration[4];
1488 u_char reserved2[8];
1489 u_char layer[2];
1490 u_char group[2];
1491 u_char volume[2];
1492 u_char reserved3[2];
1493 u_char matrix[36];
1494 u_char width[4];
1495 u_char height[4];
1496 } ngx_mp4_tkhd_atom_t;
1497
1498 typedef struct {
1499 u_char size[4];
1500 u_char name[4];
1501 u_char version[1];
1502 u_char flags[3];
1503 u_char creation_time[8];
1504 u_char modification_time[8];
1505 u_char track_id[4];
1506 u_char reserved1[4];
1507 u_char duration[8];
1508 u_char reserved2[8];
1509 u_char layer[2];
1510 u_char group[2];
1511 u_char volume[2];
1512 u_char reserved3[2];
1513 u_char matrix[36];
1514 u_char width[4];
1515 u_char height[4];
1516 } ngx_mp4_tkhd64_atom_t;
1517
1518
1519 static ngx_int_t
ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1520 ngx_http_mp4_read_tkhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1521 {
1522 u_char *atom_header;
1523 size_t atom_size;
1524 uint64_t duration, start_time, length_time;
1525 ngx_buf_t *atom;
1526 ngx_http_mp4_trak_t *trak;
1527 ngx_mp4_tkhd_atom_t *tkhd_atom;
1528 ngx_mp4_tkhd64_atom_t *tkhd64_atom;
1529
1530 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 tkhd atom");
1531
1532 atom_header = ngx_mp4_atom_header(mp4);
1533 tkhd_atom = (ngx_mp4_tkhd_atom_t *) atom_header;
1534 tkhd64_atom = (ngx_mp4_tkhd64_atom_t *) atom_header;
1535 ngx_mp4_set_atom_name(tkhd_atom, 't', 'k', 'h', 'd');
1536
1537 if (ngx_mp4_atom_data_size(ngx_mp4_tkhd_atom_t) > atom_data_size) {
1538 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1539 "\"%s\" mp4 tkhd atom too small", mp4->file.name.data);
1540 return NGX_ERROR;
1541 }
1542
1543 if (tkhd_atom->version[0] == 0) {
1544 /* version 0: 32-bit duration */
1545 duration = ngx_mp4_get_32value(tkhd_atom->duration);
1546
1547 } else {
1548 /* version 1: 64-bit duration */
1549
1550 if (ngx_mp4_atom_data_size(ngx_mp4_tkhd64_atom_t) > atom_data_size) {
1551 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1552 "\"%s\" mp4 tkhd atom too small",
1553 mp4->file.name.data);
1554 return NGX_ERROR;
1555 }
1556
1557 duration = ngx_mp4_get_64value(tkhd64_atom->duration);
1558 }
1559
1560 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1561 "tkhd duration:%uL, time:%.3fs",
1562 duration, (double) duration / mp4->timescale);
1563
1564 start_time = (uint64_t) mp4->start * mp4->timescale / 1000;
1565
1566 if (duration <= start_time) {
1567 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1568 "tkhd duration is less than start time");
1569 return NGX_DECLINED;
1570 }
1571
1572 duration -= start_time;
1573
1574 if (mp4->length) {
1575 length_time = (uint64_t) mp4->length * mp4->timescale / 1000;
1576
1577 if (duration > length_time) {
1578 duration = length_time;
1579 }
1580 }
1581
1582 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1583 "tkhd new duration:%uL, time:%.3fs",
1584 duration, (double) duration / mp4->timescale);
1585
1586 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1587
1588 trak = ngx_mp4_last_trak(mp4);
1589 trak->tkhd_size = atom_size;
1590
1591 ngx_mp4_set_32value(tkhd_atom->size, atom_size);
1592
1593 if (tkhd_atom->version[0] == 0) {
1594 ngx_mp4_set_32value(tkhd_atom->duration, duration);
1595
1596 } else {
1597 ngx_mp4_set_64value(tkhd64_atom->duration, duration);
1598 }
1599
1600 atom = &trak->tkhd_atom_buf;
1601 atom->temporary = 1;
1602 atom->pos = atom_header;
1603 atom->last = atom_header + atom_size;
1604
1605 trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf = atom;
1606
1607 ngx_mp4_atom_next(mp4, atom_data_size);
1608
1609 return NGX_OK;
1610 }
1611
1612
1613 static ngx_int_t
ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1614 ngx_http_mp4_read_mdia_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1615 {
1616 u_char *atom_header;
1617 ngx_buf_t *atom;
1618 ngx_http_mp4_trak_t *trak;
1619
1620 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process mdia atom");
1621
1622 atom_header = ngx_mp4_atom_header(mp4);
1623 ngx_mp4_set_atom_name(atom_header, 'm', 'd', 'i', 'a');
1624
1625 trak = ngx_mp4_last_trak(mp4);
1626
1627 atom = &trak->mdia_atom_buf;
1628 atom->temporary = 1;
1629 atom->pos = atom_header;
1630 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1631
1632 trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf = atom;
1633
1634 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_mdia_atoms, atom_data_size);
1635 }
1636
1637
1638 static void
ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1639 ngx_http_mp4_update_mdia_atom(ngx_http_mp4_file_t *mp4,
1640 ngx_http_mp4_trak_t *trak)
1641 {
1642 ngx_buf_t *atom;
1643
1644 trak->size += sizeof(ngx_mp4_atom_header_t);
1645 atom = &trak->mdia_atom_buf;
1646 ngx_mp4_set_32value(atom->pos, trak->size);
1647 }
1648
1649
1650 typedef struct {
1651 u_char size[4];
1652 u_char name[4];
1653 u_char version[1];
1654 u_char flags[3];
1655 u_char creation_time[4];
1656 u_char modification_time[4];
1657 u_char timescale[4];
1658 u_char duration[4];
1659 u_char language[2];
1660 u_char quality[2];
1661 } ngx_mp4_mdhd_atom_t;
1662
1663 typedef struct {
1664 u_char size[4];
1665 u_char name[4];
1666 u_char version[1];
1667 u_char flags[3];
1668 u_char creation_time[8];
1669 u_char modification_time[8];
1670 u_char timescale[4];
1671 u_char duration[8];
1672 u_char language[2];
1673 u_char quality[2];
1674 } ngx_mp4_mdhd64_atom_t;
1675
1676
1677 static ngx_int_t
ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1678 ngx_http_mp4_read_mdhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1679 {
1680 u_char *atom_header;
1681 size_t atom_size;
1682 uint32_t timescale;
1683 uint64_t duration, start_time, length_time;
1684 ngx_buf_t *atom;
1685 ngx_http_mp4_trak_t *trak;
1686 ngx_mp4_mdhd_atom_t *mdhd_atom;
1687 ngx_mp4_mdhd64_atom_t *mdhd64_atom;
1688
1689 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdhd atom");
1690
1691 atom_header = ngx_mp4_atom_header(mp4);
1692 mdhd_atom = (ngx_mp4_mdhd_atom_t *) atom_header;
1693 mdhd64_atom = (ngx_mp4_mdhd64_atom_t *) atom_header;
1694 ngx_mp4_set_atom_name(mdhd_atom, 'm', 'd', 'h', 'd');
1695
1696 if (ngx_mp4_atom_data_size(ngx_mp4_mdhd_atom_t) > atom_data_size) {
1697 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1698 "\"%s\" mp4 mdhd atom too small", mp4->file.name.data);
1699 return NGX_ERROR;
1700 }
1701
1702 if (mdhd_atom->version[0] == 0) {
1703 /* version 0: everything is 32-bit */
1704 timescale = ngx_mp4_get_32value(mdhd_atom->timescale);
1705 duration = ngx_mp4_get_32value(mdhd_atom->duration);
1706
1707 } else {
1708 /* version 1: 64-bit duration and 32-bit timescale */
1709
1710 if (ngx_mp4_atom_data_size(ngx_mp4_mdhd64_atom_t) > atom_data_size) {
1711 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
1712 "\"%s\" mp4 mdhd atom too small",
1713 mp4->file.name.data);
1714 return NGX_ERROR;
1715 }
1716
1717 timescale = ngx_mp4_get_32value(mdhd64_atom->timescale);
1718 duration = ngx_mp4_get_64value(mdhd64_atom->duration);
1719 }
1720
1721 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1722 "mdhd timescale:%uD, duration:%uL, time:%.3fs",
1723 timescale, duration, (double) duration / timescale);
1724
1725 start_time = (uint64_t) mp4->start * timescale / 1000;
1726
1727 if (duration <= start_time) {
1728 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1729 "mdhd duration is less than start time");
1730 return NGX_DECLINED;
1731 }
1732
1733 duration -= start_time;
1734
1735 if (mp4->length) {
1736 length_time = (uint64_t) mp4->length * timescale / 1000;
1737
1738 if (duration > length_time) {
1739 duration = length_time;
1740 }
1741 }
1742
1743 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
1744 "mdhd new duration:%uL, time:%.3fs",
1745 duration, (double) duration / timescale);
1746
1747 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1748
1749 trak = ngx_mp4_last_trak(mp4);
1750 trak->mdhd_size = atom_size;
1751 trak->timescale = timescale;
1752
1753 ngx_mp4_set_32value(mdhd_atom->size, atom_size);
1754
1755 if (mdhd_atom->version[0] == 0) {
1756 ngx_mp4_set_32value(mdhd_atom->duration, duration);
1757
1758 } else {
1759 ngx_mp4_set_64value(mdhd64_atom->duration, duration);
1760 }
1761
1762 atom = &trak->mdhd_atom_buf;
1763 atom->temporary = 1;
1764 atom->pos = atom_header;
1765 atom->last = atom_header + atom_size;
1766
1767 trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf = atom;
1768
1769 ngx_mp4_atom_next(mp4, atom_data_size);
1770
1771 return NGX_OK;
1772 }
1773
1774
1775 static ngx_int_t
ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1776 ngx_http_mp4_read_hdlr_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1777 {
1778 u_char *atom_header;
1779 size_t atom_size;
1780 ngx_buf_t *atom;
1781 ngx_http_mp4_trak_t *trak;
1782
1783 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 hdlr atom");
1784
1785 atom_header = ngx_mp4_atom_header(mp4);
1786 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1787 ngx_mp4_set_32value(atom_header, atom_size);
1788 ngx_mp4_set_atom_name(atom_header, 'h', 'd', 'l', 'r');
1789
1790 trak = ngx_mp4_last_trak(mp4);
1791
1792 atom = &trak->hdlr_atom_buf;
1793 atom->temporary = 1;
1794 atom->pos = atom_header;
1795 atom->last = atom_header + atom_size;
1796
1797 trak->hdlr_size = atom_size;
1798 trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf = atom;
1799
1800 ngx_mp4_atom_next(mp4, atom_data_size);
1801
1802 return NGX_OK;
1803 }
1804
1805
1806 static ngx_int_t
ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1807 ngx_http_mp4_read_minf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1808 {
1809 u_char *atom_header;
1810 ngx_buf_t *atom;
1811 ngx_http_mp4_trak_t *trak;
1812
1813 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process minf atom");
1814
1815 atom_header = ngx_mp4_atom_header(mp4);
1816 ngx_mp4_set_atom_name(atom_header, 'm', 'i', 'n', 'f');
1817
1818 trak = ngx_mp4_last_trak(mp4);
1819
1820 atom = &trak->minf_atom_buf;
1821 atom->temporary = 1;
1822 atom->pos = atom_header;
1823 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1824
1825 trak->out[NGX_HTTP_MP4_MINF_ATOM].buf = atom;
1826
1827 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_minf_atoms, atom_data_size);
1828 }
1829
1830
1831 static void
ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1832 ngx_http_mp4_update_minf_atom(ngx_http_mp4_file_t *mp4,
1833 ngx_http_mp4_trak_t *trak)
1834 {
1835 ngx_buf_t *atom;
1836
1837 trak->size += sizeof(ngx_mp4_atom_header_t)
1838 + trak->vmhd_size
1839 + trak->smhd_size
1840 + trak->dinf_size;
1841 atom = &trak->minf_atom_buf;
1842 ngx_mp4_set_32value(atom->pos, trak->size);
1843 }
1844
1845
1846 static ngx_int_t
ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1847 ngx_http_mp4_read_vmhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1848 {
1849 u_char *atom_header;
1850 size_t atom_size;
1851 ngx_buf_t *atom;
1852 ngx_http_mp4_trak_t *trak;
1853
1854 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 vmhd atom");
1855
1856 atom_header = ngx_mp4_atom_header(mp4);
1857 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1858 ngx_mp4_set_32value(atom_header, atom_size);
1859 ngx_mp4_set_atom_name(atom_header, 'v', 'm', 'h', 'd');
1860
1861 trak = ngx_mp4_last_trak(mp4);
1862
1863 atom = &trak->vmhd_atom_buf;
1864 atom->temporary = 1;
1865 atom->pos = atom_header;
1866 atom->last = atom_header + atom_size;
1867
1868 trak->vmhd_size += atom_size;
1869 trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf = atom;
1870
1871 ngx_mp4_atom_next(mp4, atom_data_size);
1872
1873 return NGX_OK;
1874 }
1875
1876
1877 static ngx_int_t
ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1878 ngx_http_mp4_read_smhd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1879 {
1880 u_char *atom_header;
1881 size_t atom_size;
1882 ngx_buf_t *atom;
1883 ngx_http_mp4_trak_t *trak;
1884
1885 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 smhd atom");
1886
1887 atom_header = ngx_mp4_atom_header(mp4);
1888 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1889 ngx_mp4_set_32value(atom_header, atom_size);
1890 ngx_mp4_set_atom_name(atom_header, 's', 'm', 'h', 'd');
1891
1892 trak = ngx_mp4_last_trak(mp4);
1893
1894 atom = &trak->smhd_atom_buf;
1895 atom->temporary = 1;
1896 atom->pos = atom_header;
1897 atom->last = atom_header + atom_size;
1898
1899 trak->smhd_size += atom_size;
1900 trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf = atom;
1901
1902 ngx_mp4_atom_next(mp4, atom_data_size);
1903
1904 return NGX_OK;
1905 }
1906
1907
1908 static ngx_int_t
ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1909 ngx_http_mp4_read_dinf_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1910 {
1911 u_char *atom_header;
1912 size_t atom_size;
1913 ngx_buf_t *atom;
1914 ngx_http_mp4_trak_t *trak;
1915
1916 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 dinf atom");
1917
1918 atom_header = ngx_mp4_atom_header(mp4);
1919 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
1920 ngx_mp4_set_32value(atom_header, atom_size);
1921 ngx_mp4_set_atom_name(atom_header, 'd', 'i', 'n', 'f');
1922
1923 trak = ngx_mp4_last_trak(mp4);
1924
1925 atom = &trak->dinf_atom_buf;
1926 atom->temporary = 1;
1927 atom->pos = atom_header;
1928 atom->last = atom_header + atom_size;
1929
1930 trak->dinf_size += atom_size;
1931 trak->out[NGX_HTTP_MP4_DINF_ATOM].buf = atom;
1932
1933 ngx_mp4_atom_next(mp4, atom_data_size);
1934
1935 return NGX_OK;
1936 }
1937
1938
1939 static ngx_int_t
ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1940 ngx_http_mp4_read_stbl_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1941 {
1942 u_char *atom_header;
1943 ngx_buf_t *atom;
1944 ngx_http_mp4_trak_t *trak;
1945
1946 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "process stbl atom");
1947
1948 atom_header = ngx_mp4_atom_header(mp4);
1949 ngx_mp4_set_atom_name(atom_header, 's', 't', 'b', 'l');
1950
1951 trak = ngx_mp4_last_trak(mp4);
1952
1953 atom = &trak->stbl_atom_buf;
1954 atom->temporary = 1;
1955 atom->pos = atom_header;
1956 atom->last = atom_header + sizeof(ngx_mp4_atom_header_t);
1957
1958 trak->out[NGX_HTTP_MP4_STBL_ATOM].buf = atom;
1959
1960 return ngx_http_mp4_read_atom(mp4, ngx_http_mp4_stbl_atoms, atom_data_size);
1961 }
1962
1963
1964 static void
ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)1965 ngx_http_mp4_update_stbl_atom(ngx_http_mp4_file_t *mp4,
1966 ngx_http_mp4_trak_t *trak)
1967 {
1968 ngx_buf_t *atom;
1969
1970 trak->size += sizeof(ngx_mp4_atom_header_t);
1971 atom = &trak->stbl_atom_buf;
1972 ngx_mp4_set_32value(atom->pos, trak->size);
1973 }
1974
1975
1976 typedef struct {
1977 u_char size[4];
1978 u_char name[4];
1979 u_char version[1];
1980 u_char flags[3];
1981 u_char entries[4];
1982
1983 u_char media_size[4];
1984 u_char media_name[4];
1985 } ngx_mp4_stsd_atom_t;
1986
1987
1988 static ngx_int_t
ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)1989 ngx_http_mp4_read_stsd_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
1990 {
1991 u_char *atom_header, *atom_table;
1992 size_t atom_size;
1993 ngx_buf_t *atom;
1994 ngx_mp4_stsd_atom_t *stsd_atom;
1995 ngx_http_mp4_trak_t *trak;
1996
1997 /* sample description atom */
1998
1999 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsd atom");
2000
2001 atom_header = ngx_mp4_atom_header(mp4);
2002 stsd_atom = (ngx_mp4_stsd_atom_t *) atom_header;
2003 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
2004 atom_table = atom_header + atom_size;
2005 ngx_mp4_set_32value(stsd_atom->size, atom_size);
2006 ngx_mp4_set_atom_name(stsd_atom, 's', 't', 's', 'd');
2007
2008 if (ngx_mp4_atom_data_size(ngx_mp4_stsd_atom_t) > atom_data_size) {
2009 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2010 "\"%s\" mp4 stsd atom too small", mp4->file.name.data);
2011 return NGX_ERROR;
2012 }
2013
2014 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2015 "stsd entries:%uD, media:%*s",
2016 ngx_mp4_get_32value(stsd_atom->entries),
2017 (size_t) 4, stsd_atom->media_name);
2018
2019 trak = ngx_mp4_last_trak(mp4);
2020
2021 atom = &trak->stsd_atom_buf;
2022 atom->temporary = 1;
2023 atom->pos = atom_header;
2024 atom->last = atom_table;
2025
2026 trak->out[NGX_HTTP_MP4_STSD_ATOM].buf = atom;
2027 trak->size += atom_size;
2028
2029 ngx_mp4_atom_next(mp4, atom_data_size);
2030
2031 return NGX_OK;
2032 }
2033
2034
2035 typedef struct {
2036 u_char size[4];
2037 u_char name[4];
2038 u_char version[1];
2039 u_char flags[3];
2040 u_char entries[4];
2041 } ngx_mp4_stts_atom_t;
2042
2043 typedef struct {
2044 u_char count[4];
2045 u_char duration[4];
2046 } ngx_mp4_stts_entry_t;
2047
2048
2049 static ngx_int_t
ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2050 ngx_http_mp4_read_stts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2051 {
2052 u_char *atom_header, *atom_table, *atom_end;
2053 uint32_t entries;
2054 ngx_buf_t *atom, *data;
2055 ngx_mp4_stts_atom_t *stts_atom;
2056 ngx_http_mp4_trak_t *trak;
2057
2058 /* time-to-sample atom */
2059
2060 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stts atom");
2061
2062 atom_header = ngx_mp4_atom_header(mp4);
2063 stts_atom = (ngx_mp4_stts_atom_t *) atom_header;
2064 ngx_mp4_set_atom_name(stts_atom, 's', 't', 't', 's');
2065
2066 if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t) > atom_data_size) {
2067 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2068 "\"%s\" mp4 stts atom too small", mp4->file.name.data);
2069 return NGX_ERROR;
2070 }
2071
2072 entries = ngx_mp4_get_32value(stts_atom->entries);
2073
2074 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2075 "mp4 time-to-sample entries:%uD", entries);
2076
2077 if (ngx_mp4_atom_data_size(ngx_mp4_stts_atom_t)
2078 + entries * sizeof(ngx_mp4_stts_entry_t) > atom_data_size)
2079 {
2080 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2081 "\"%s\" mp4 stts atom too small", mp4->file.name.data);
2082 return NGX_ERROR;
2083 }
2084
2085 atom_table = atom_header + sizeof(ngx_mp4_stts_atom_t);
2086 atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
2087
2088 trak = ngx_mp4_last_trak(mp4);
2089 trak->time_to_sample_entries = entries;
2090
2091 atom = &trak->stts_atom_buf;
2092 atom->temporary = 1;
2093 atom->pos = atom_header;
2094 atom->last = atom_table;
2095
2096 data = &trak->stts_data_buf;
2097 data->temporary = 1;
2098 data->pos = atom_table;
2099 data->last = atom_end;
2100
2101 trak->out[NGX_HTTP_MP4_STTS_ATOM].buf = atom;
2102 trak->out[NGX_HTTP_MP4_STTS_DATA].buf = data;
2103
2104 ngx_mp4_atom_next(mp4, atom_data_size);
2105
2106 return NGX_OK;
2107 }
2108
2109
2110 static ngx_int_t
ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2111 ngx_http_mp4_update_stts_atom(ngx_http_mp4_file_t *mp4,
2112 ngx_http_mp4_trak_t *trak)
2113 {
2114 size_t atom_size;
2115 ngx_buf_t *atom, *data;
2116 ngx_mp4_stts_atom_t *stts_atom;
2117
2118 /*
2119 * mdia.minf.stbl.stts updating requires trak->timescale
2120 * from mdia.mdhd atom which may reside after mdia.minf
2121 */
2122
2123 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2124 "mp4 stts atom update");
2125
2126 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
2127
2128 if (data == NULL) {
2129 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2130 "no mp4 stts atoms were found in \"%s\"",
2131 mp4->file.name.data);
2132 return NGX_ERROR;
2133 }
2134
2135 if (ngx_http_mp4_crop_stts_data(mp4, trak, 1) != NGX_OK) {
2136 return NGX_ERROR;
2137 }
2138
2139 if (ngx_http_mp4_crop_stts_data(mp4, trak, 0) != NGX_OK) {
2140 return NGX_ERROR;
2141 }
2142
2143 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2144 "time-to-sample entries:%uD", trak->time_to_sample_entries);
2145
2146 atom_size = sizeof(ngx_mp4_stts_atom_t) + (data->last - data->pos);
2147 trak->size += atom_size;
2148
2149 atom = trak->out[NGX_HTTP_MP4_STTS_ATOM].buf;
2150 stts_atom = (ngx_mp4_stts_atom_t *) atom->pos;
2151 ngx_mp4_set_32value(stts_atom->size, atom_size);
2152 ngx_mp4_set_32value(stts_atom->entries, trak->time_to_sample_entries);
2153
2154 return NGX_OK;
2155 }
2156
2157
2158 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)2159 ngx_http_mp4_crop_stts_data(ngx_http_mp4_file_t *mp4,
2160 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2161 {
2162 uint32_t count, duration, rest;
2163 uint64_t start_time;
2164 ngx_buf_t *data;
2165 ngx_uint_t start_sample, entries, start_sec;
2166 ngx_mp4_stts_entry_t *entry, *end;
2167
2168 if (start) {
2169 start_sec = mp4->start;
2170
2171 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2172 "mp4 stts crop start_time:%ui", start_sec);
2173
2174 } else if (mp4->length) {
2175 start_sec = mp4->length;
2176
2177 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2178 "mp4 stts crop end_time:%ui", start_sec);
2179
2180 } else {
2181 return NGX_OK;
2182 }
2183
2184 data = trak->out[NGX_HTTP_MP4_STTS_DATA].buf;
2185
2186 start_time = (uint64_t) start_sec * trak->timescale / 1000;
2187
2188 entries = trak->time_to_sample_entries;
2189 start_sample = 0;
2190 entry = (ngx_mp4_stts_entry_t *) data->pos;
2191 end = (ngx_mp4_stts_entry_t *) data->last;
2192
2193 while (entry < end) {
2194 count = ngx_mp4_get_32value(entry->count);
2195 duration = ngx_mp4_get_32value(entry->duration);
2196
2197 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2198 "time:%uL, count:%uD, duration:%uD",
2199 start_time, count, duration);
2200
2201 if (start_time < (uint64_t) count * duration) {
2202 start_sample += (ngx_uint_t) (start_time / duration);
2203 rest = (uint32_t) (start_time / duration);
2204 goto found;
2205 }
2206
2207 start_sample += count;
2208 start_time -= count * duration;
2209 entries--;
2210 entry++;
2211 }
2212
2213 if (start) {
2214 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2215 "start time is out mp4 stts samples in \"%s\"",
2216 mp4->file.name.data);
2217
2218 return NGX_ERROR;
2219
2220 } else {
2221 trak->end_sample = trak->start_sample + start_sample;
2222
2223 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2224 "end_sample:%ui", trak->end_sample);
2225
2226 return NGX_OK;
2227 }
2228
2229 found:
2230
2231 if (start) {
2232 ngx_mp4_set_32value(entry->count, count - rest);
2233 data->pos = (u_char *) entry;
2234 trak->time_to_sample_entries = entries;
2235 trak->start_sample = start_sample;
2236
2237 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2238 "start_sample:%ui, new count:%uD",
2239 trak->start_sample, count - rest);
2240
2241 } else {
2242 ngx_mp4_set_32value(entry->count, rest);
2243 data->last = (u_char *) (entry + 1);
2244 trak->time_to_sample_entries -= entries - 1;
2245 trak->end_sample = trak->start_sample + start_sample;
2246
2247 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2248 "end_sample:%ui, new count:%uD",
2249 trak->end_sample, rest);
2250 }
2251
2252 return NGX_OK;
2253 }
2254
2255
2256 typedef struct {
2257 u_char size[4];
2258 u_char name[4];
2259 u_char version[1];
2260 u_char flags[3];
2261 u_char entries[4];
2262 } ngx_http_mp4_stss_atom_t;
2263
2264
2265 static ngx_int_t
ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2266 ngx_http_mp4_read_stss_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2267 {
2268 u_char *atom_header, *atom_table, *atom_end;
2269 uint32_t entries;
2270 ngx_buf_t *atom, *data;
2271 ngx_http_mp4_trak_t *trak;
2272 ngx_http_mp4_stss_atom_t *stss_atom;
2273
2274 /* sync samples atom */
2275
2276 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stss atom");
2277
2278 atom_header = ngx_mp4_atom_header(mp4);
2279 stss_atom = (ngx_http_mp4_stss_atom_t *) atom_header;
2280 ngx_mp4_set_atom_name(stss_atom, 's', 't', 's', 's');
2281
2282 if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t) > atom_data_size) {
2283 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2284 "\"%s\" mp4 stss atom too small", mp4->file.name.data);
2285 return NGX_ERROR;
2286 }
2287
2288 entries = ngx_mp4_get_32value(stss_atom->entries);
2289
2290 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2291 "sync sample entries:%uD", entries);
2292
2293 trak = ngx_mp4_last_trak(mp4);
2294 trak->sync_samples_entries = entries;
2295
2296 atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t);
2297
2298 atom = &trak->stss_atom_buf;
2299 atom->temporary = 1;
2300 atom->pos = atom_header;
2301 atom->last = atom_table;
2302
2303 if (ngx_mp4_atom_data_size(ngx_http_mp4_stss_atom_t)
2304 + entries * sizeof(uint32_t) > atom_data_size)
2305 {
2306 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2307 "\"%s\" mp4 stss atom too small", mp4->file.name.data);
2308 return NGX_ERROR;
2309 }
2310
2311 atom_end = atom_table + entries * sizeof(uint32_t);
2312
2313 data = &trak->stss_data_buf;
2314 data->temporary = 1;
2315 data->pos = atom_table;
2316 data->last = atom_end;
2317
2318 trak->out[NGX_HTTP_MP4_STSS_ATOM].buf = atom;
2319 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = data;
2320
2321 ngx_mp4_atom_next(mp4, atom_data_size);
2322
2323 return NGX_OK;
2324 }
2325
2326
2327 static ngx_int_t
ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2328 ngx_http_mp4_update_stss_atom(ngx_http_mp4_file_t *mp4,
2329 ngx_http_mp4_trak_t *trak)
2330 {
2331 size_t atom_size;
2332 uint32_t sample, start_sample, *entry, *end;
2333 ngx_buf_t *atom, *data;
2334 ngx_http_mp4_stss_atom_t *stss_atom;
2335
2336 /*
2337 * mdia.minf.stbl.stss updating requires trak->start_sample
2338 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2339 * atom which may reside after mdia.minf
2340 */
2341
2342 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2343 "mp4 stss atom update");
2344
2345 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
2346
2347 if (data == NULL) {
2348 return NGX_OK;
2349 }
2350
2351 ngx_http_mp4_crop_stss_data(mp4, trak, 1);
2352 ngx_http_mp4_crop_stss_data(mp4, trak, 0);
2353
2354 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2355 "sync sample entries:%uD", trak->sync_samples_entries);
2356
2357 if (trak->sync_samples_entries) {
2358 entry = (uint32_t *) data->pos;
2359 end = (uint32_t *) data->last;
2360
2361 start_sample = trak->start_sample;
2362
2363 while (entry < end) {
2364 sample = ngx_mp4_get_32value(entry);
2365 sample -= start_sample;
2366 ngx_mp4_set_32value(entry, sample);
2367 entry++;
2368 }
2369
2370 } else {
2371 trak->out[NGX_HTTP_MP4_STSS_DATA].buf = NULL;
2372 }
2373
2374 atom_size = sizeof(ngx_http_mp4_stss_atom_t) + (data->last - data->pos);
2375 trak->size += atom_size;
2376
2377 atom = trak->out[NGX_HTTP_MP4_STSS_ATOM].buf;
2378 stss_atom = (ngx_http_mp4_stss_atom_t *) atom->pos;
2379
2380 ngx_mp4_set_32value(stss_atom->size, atom_size);
2381 ngx_mp4_set_32value(stss_atom->entries, trak->sync_samples_entries);
2382
2383 return NGX_OK;
2384 }
2385
2386
2387 static void
ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2388 ngx_http_mp4_crop_stss_data(ngx_http_mp4_file_t *mp4,
2389 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2390 {
2391 uint32_t sample, start_sample, *entry, *end;
2392 ngx_buf_t *data;
2393 ngx_uint_t entries;
2394
2395 /* sync samples starts from 1 */
2396
2397 if (start) {
2398 start_sample = trak->start_sample + 1;
2399
2400 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2401 "mp4 stss crop start_sample:%uD", start_sample);
2402
2403 } else if (mp4->length) {
2404 start_sample = trak->end_sample + 1;
2405
2406 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2407 "mp4 stss crop end_sample:%uD", start_sample);
2408
2409 } else {
2410 return;
2411 }
2412
2413 data = trak->out[NGX_HTTP_MP4_STSS_DATA].buf;
2414
2415 entries = trak->sync_samples_entries;
2416 entry = (uint32_t *) data->pos;
2417 end = (uint32_t *) data->last;
2418
2419 while (entry < end) {
2420 sample = ngx_mp4_get_32value(entry);
2421
2422 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2423 "sync:%uD", sample);
2424
2425 if (sample >= start_sample) {
2426 goto found;
2427 }
2428
2429 entries--;
2430 entry++;
2431 }
2432
2433 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2434 "sample is out of mp4 stss atom");
2435
2436 found:
2437
2438 if (start) {
2439 data->pos = (u_char *) entry;
2440 trak->sync_samples_entries = entries;
2441
2442 } else {
2443 data->last = (u_char *) entry;
2444 trak->sync_samples_entries -= entries;
2445 }
2446 }
2447
2448
2449 typedef struct {
2450 u_char size[4];
2451 u_char name[4];
2452 u_char version[1];
2453 u_char flags[3];
2454 u_char entries[4];
2455 } ngx_mp4_ctts_atom_t;
2456
2457 typedef struct {
2458 u_char count[4];
2459 u_char offset[4];
2460 } ngx_mp4_ctts_entry_t;
2461
2462
2463 static ngx_int_t
ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2464 ngx_http_mp4_read_ctts_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2465 {
2466 u_char *atom_header, *atom_table, *atom_end;
2467 uint32_t entries;
2468 ngx_buf_t *atom, *data;
2469 ngx_mp4_ctts_atom_t *ctts_atom;
2470 ngx_http_mp4_trak_t *trak;
2471
2472 /* composition offsets atom */
2473
2474 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 ctts atom");
2475
2476 atom_header = ngx_mp4_atom_header(mp4);
2477 ctts_atom = (ngx_mp4_ctts_atom_t *) atom_header;
2478 ngx_mp4_set_atom_name(ctts_atom, 'c', 't', 't', 's');
2479
2480 if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t) > atom_data_size) {
2481 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2482 "\"%s\" mp4 ctts atom too small", mp4->file.name.data);
2483 return NGX_ERROR;
2484 }
2485
2486 entries = ngx_mp4_get_32value(ctts_atom->entries);
2487
2488 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2489 "composition offset entries:%uD", entries);
2490
2491 trak = ngx_mp4_last_trak(mp4);
2492 trak->composition_offset_entries = entries;
2493
2494 atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t);
2495
2496 atom = &trak->ctts_atom_buf;
2497 atom->temporary = 1;
2498 atom->pos = atom_header;
2499 atom->last = atom_table;
2500
2501 if (ngx_mp4_atom_data_size(ngx_mp4_ctts_atom_t)
2502 + entries * sizeof(ngx_mp4_ctts_entry_t) > atom_data_size)
2503 {
2504 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2505 "\"%s\" mp4 ctts atom too small", mp4->file.name.data);
2506 return NGX_ERROR;
2507 }
2508
2509 atom_end = atom_table + entries * sizeof(ngx_mp4_ctts_entry_t);
2510
2511 data = &trak->ctts_data_buf;
2512 data->temporary = 1;
2513 data->pos = atom_table;
2514 data->last = atom_end;
2515
2516 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = atom;
2517 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = data;
2518
2519 ngx_mp4_atom_next(mp4, atom_data_size);
2520
2521 return NGX_OK;
2522 }
2523
2524
2525 static void
ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2526 ngx_http_mp4_update_ctts_atom(ngx_http_mp4_file_t *mp4,
2527 ngx_http_mp4_trak_t *trak)
2528 {
2529 size_t atom_size;
2530 ngx_buf_t *atom, *data;
2531 ngx_mp4_ctts_atom_t *ctts_atom;
2532
2533 /*
2534 * mdia.minf.stbl.ctts updating requires trak->start_sample
2535 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2536 * atom which may reside after mdia.minf
2537 */
2538
2539 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2540 "mp4 ctts atom update");
2541
2542 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2543
2544 if (data == NULL) {
2545 return;
2546 }
2547
2548 ngx_http_mp4_crop_ctts_data(mp4, trak, 1);
2549 ngx_http_mp4_crop_ctts_data(mp4, trak, 0);
2550
2551 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2552 "composition offset entries:%uD",
2553 trak->composition_offset_entries);
2554
2555 if (trak->composition_offset_entries == 0) {
2556 trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf = NULL;
2557 trak->out[NGX_HTTP_MP4_CTTS_DATA].buf = NULL;
2558 return;
2559 }
2560
2561 atom_size = sizeof(ngx_mp4_ctts_atom_t) + (data->last - data->pos);
2562 trak->size += atom_size;
2563
2564 atom = trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf;
2565 ctts_atom = (ngx_mp4_ctts_atom_t *) atom->pos;
2566
2567 ngx_mp4_set_32value(ctts_atom->size, atom_size);
2568 ngx_mp4_set_32value(ctts_atom->entries, trak->composition_offset_entries);
2569
2570 return;
2571 }
2572
2573
2574 static void
ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,ngx_uint_t start)2575 ngx_http_mp4_crop_ctts_data(ngx_http_mp4_file_t *mp4,
2576 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2577 {
2578 uint32_t count, start_sample, rest;
2579 ngx_buf_t *data;
2580 ngx_uint_t entries;
2581 ngx_mp4_ctts_entry_t *entry, *end;
2582
2583 /* sync samples starts from 1 */
2584
2585 if (start) {
2586 start_sample = trak->start_sample + 1;
2587
2588 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2589 "mp4 ctts crop start_sample:%uD", start_sample);
2590
2591 } else if (mp4->length) {
2592 start_sample = trak->end_sample - trak->start_sample + 1;
2593
2594 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2595 "mp4 ctts crop end_sample:%uD", start_sample);
2596
2597 } else {
2598 return;
2599 }
2600
2601 data = trak->out[NGX_HTTP_MP4_CTTS_DATA].buf;
2602
2603 entries = trak->composition_offset_entries;
2604 entry = (ngx_mp4_ctts_entry_t *) data->pos;
2605 end = (ngx_mp4_ctts_entry_t *) data->last;
2606
2607 while (entry < end) {
2608 count = ngx_mp4_get_32value(entry->count);
2609
2610 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2611 "sample:%uD, count:%uD, offset:%uD",
2612 start_sample, count, ngx_mp4_get_32value(entry->offset));
2613
2614 if (start_sample <= count) {
2615 rest = start_sample - 1;
2616 goto found;
2617 }
2618
2619 start_sample -= count;
2620 entries--;
2621 entry++;
2622 }
2623
2624 if (start) {
2625 data->pos = (u_char *) end;
2626 trak->composition_offset_entries = 0;
2627 }
2628
2629 return;
2630
2631 found:
2632
2633 if (start) {
2634 ngx_mp4_set_32value(entry->count, count - rest);
2635 data->pos = (u_char *) entry;
2636 trak->composition_offset_entries = entries;
2637
2638 } else {
2639 ngx_mp4_set_32value(entry->count, rest);
2640 data->last = (u_char *) (entry + 1);
2641 trak->composition_offset_entries -= entries - 1;
2642 }
2643 }
2644
2645
2646 typedef struct {
2647 u_char size[4];
2648 u_char name[4];
2649 u_char version[1];
2650 u_char flags[3];
2651 u_char entries[4];
2652 } ngx_mp4_stsc_atom_t;
2653
2654
2655 static ngx_int_t
ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2656 ngx_http_mp4_read_stsc_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2657 {
2658 u_char *atom_header, *atom_table, *atom_end;
2659 uint32_t entries;
2660 ngx_buf_t *atom, *data;
2661 ngx_mp4_stsc_atom_t *stsc_atom;
2662 ngx_http_mp4_trak_t *trak;
2663
2664 /* sample-to-chunk atom */
2665
2666 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsc atom");
2667
2668 atom_header = ngx_mp4_atom_header(mp4);
2669 stsc_atom = (ngx_mp4_stsc_atom_t *) atom_header;
2670 ngx_mp4_set_atom_name(stsc_atom, 's', 't', 's', 'c');
2671
2672 if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t) > atom_data_size) {
2673 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2674 "\"%s\" mp4 stsc atom too small", mp4->file.name.data);
2675 return NGX_ERROR;
2676 }
2677
2678 entries = ngx_mp4_get_32value(stsc_atom->entries);
2679
2680 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2681 "sample-to-chunk entries:%uD", entries);
2682
2683 if (ngx_mp4_atom_data_size(ngx_mp4_stsc_atom_t)
2684 + entries * sizeof(ngx_mp4_stsc_entry_t) > atom_data_size)
2685 {
2686 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2687 "\"%s\" mp4 stsc atom too small", mp4->file.name.data);
2688 return NGX_ERROR;
2689 }
2690
2691 atom_table = atom_header + sizeof(ngx_mp4_stsc_atom_t);
2692 atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
2693
2694 trak = ngx_mp4_last_trak(mp4);
2695 trak->sample_to_chunk_entries = entries;
2696
2697 atom = &trak->stsc_atom_buf;
2698 atom->temporary = 1;
2699 atom->pos = atom_header;
2700 atom->last = atom_table;
2701
2702 data = &trak->stsc_data_buf;
2703 data->temporary = 1;
2704 data->pos = atom_table;
2705 data->last = atom_end;
2706
2707 trak->out[NGX_HTTP_MP4_STSC_ATOM].buf = atom;
2708 trak->out[NGX_HTTP_MP4_STSC_DATA].buf = data;
2709
2710 ngx_mp4_atom_next(mp4, atom_data_size);
2711
2712 return NGX_OK;
2713 }
2714
2715
2716 static ngx_int_t
ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)2717 ngx_http_mp4_update_stsc_atom(ngx_http_mp4_file_t *mp4,
2718 ngx_http_mp4_trak_t *trak)
2719 {
2720 size_t atom_size;
2721 uint32_t chunk;
2722 ngx_buf_t *atom, *data;
2723 ngx_mp4_stsc_atom_t *stsc_atom;
2724 ngx_mp4_stsc_entry_t *entry, *end;
2725
2726 /*
2727 * mdia.minf.stbl.stsc updating requires trak->start_sample
2728 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
2729 * atom which may reside after mdia.minf
2730 */
2731
2732 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2733 "mp4 stsc atom update");
2734
2735 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2736
2737 if (data == NULL) {
2738 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2739 "no mp4 stsc atoms were found in \"%s\"",
2740 mp4->file.name.data);
2741 return NGX_ERROR;
2742 }
2743
2744 if (trak->sample_to_chunk_entries == 0) {
2745 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2746 "zero number of entries in stsc atom in \"%s\"",
2747 mp4->file.name.data);
2748 return NGX_ERROR;
2749 }
2750
2751 if (ngx_http_mp4_crop_stsc_data(mp4, trak, 1) != NGX_OK) {
2752 return NGX_ERROR;
2753 }
2754
2755 if (ngx_http_mp4_crop_stsc_data(mp4, trak, 0) != NGX_OK) {
2756 return NGX_ERROR;
2757 }
2758
2759 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2760 "sample-to-chunk entries:%uD",
2761 trak->sample_to_chunk_entries);
2762
2763 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2764 end = (ngx_mp4_stsc_entry_t *) data->last;
2765
2766 while (entry < end) {
2767 chunk = ngx_mp4_get_32value(entry->chunk);
2768 chunk -= trak->start_chunk;
2769 ngx_mp4_set_32value(entry->chunk, chunk);
2770 entry++;
2771 }
2772
2773 atom_size = sizeof(ngx_mp4_stsc_atom_t)
2774 + trak->sample_to_chunk_entries * sizeof(ngx_mp4_stsc_entry_t);
2775
2776 trak->size += atom_size;
2777
2778 atom = trak->out[NGX_HTTP_MP4_STSC_ATOM].buf;
2779 stsc_atom = (ngx_mp4_stsc_atom_t *) atom->pos;
2780
2781 ngx_mp4_set_32value(stsc_atom->size, atom_size);
2782 ngx_mp4_set_32value(stsc_atom->entries, trak->sample_to_chunk_entries);
2783
2784 return NGX_OK;
2785 }
2786
2787
2788 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)2789 ngx_http_mp4_crop_stsc_data(ngx_http_mp4_file_t *mp4,
2790 ngx_http_mp4_trak_t *trak, ngx_uint_t start)
2791 {
2792 uint32_t start_sample, chunk, samples, id, next_chunk, n,
2793 prev_samples;
2794 ngx_buf_t *data, *buf;
2795 ngx_uint_t entries, target_chunk, chunk_samples;
2796 ngx_mp4_stsc_entry_t *entry, *end, *first;
2797
2798 entries = trak->sample_to_chunk_entries - 1;
2799
2800 if (start) {
2801 start_sample = (uint32_t) trak->start_sample;
2802
2803 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2804 "mp4 stsc crop start_sample:%uD", start_sample);
2805
2806 } else if (mp4->length) {
2807 start_sample = (uint32_t) (trak->end_sample - trak->start_sample);
2808 samples = 0;
2809
2810 data = trak->out[NGX_HTTP_MP4_STSC_START].buf;
2811
2812 if (data) {
2813 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2814 samples = ngx_mp4_get_32value(entry->samples);
2815 entries--;
2816
2817 if (samples > start_sample) {
2818 samples = start_sample;
2819 ngx_mp4_set_32value(entry->samples, samples);
2820 }
2821
2822 start_sample -= samples;
2823 }
2824
2825 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2826 "mp4 stsc crop end_sample:%uD, ext_samples:%uD",
2827 start_sample, samples);
2828
2829 } else {
2830 return NGX_OK;
2831 }
2832
2833 data = trak->out[NGX_HTTP_MP4_STSC_DATA].buf;
2834
2835 entry = (ngx_mp4_stsc_entry_t *) data->pos;
2836 end = (ngx_mp4_stsc_entry_t *) data->last;
2837
2838 chunk = ngx_mp4_get_32value(entry->chunk);
2839 samples = ngx_mp4_get_32value(entry->samples);
2840 id = ngx_mp4_get_32value(entry->id);
2841 prev_samples = 0;
2842 entry++;
2843
2844 while (entry < end) {
2845
2846 next_chunk = ngx_mp4_get_32value(entry->chunk);
2847
2848 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2849 "sample:%uD, chunk:%uD, chunks:%uD, "
2850 "samples:%uD, id:%uD",
2851 start_sample, chunk, next_chunk - chunk, samples, id);
2852
2853 n = (next_chunk - chunk) * samples;
2854
2855 if (start_sample < n) {
2856 goto found;
2857 }
2858
2859 start_sample -= n;
2860
2861 prev_samples = samples;
2862 chunk = next_chunk;
2863 samples = ngx_mp4_get_32value(entry->samples);
2864 id = ngx_mp4_get_32value(entry->id);
2865 entries--;
2866 entry++;
2867 }
2868
2869 next_chunk = trak->chunks + 1;
2870
2871 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2872 "sample:%uD, chunk:%uD, chunks:%uD, samples:%uD",
2873 start_sample, chunk, next_chunk - chunk, samples);
2874
2875 n = (next_chunk - chunk) * samples;
2876
2877 if (start_sample > n) {
2878 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2879 "%s time is out mp4 stsc chunks in \"%s\"",
2880 start ? "start" : "end", mp4->file.name.data);
2881 return NGX_ERROR;
2882 }
2883
2884 found:
2885
2886 entries++;
2887 entry--;
2888
2889 if (samples == 0) {
2890 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
2891 "zero number of samples in \"%s\"",
2892 mp4->file.name.data);
2893 return NGX_ERROR;
2894 }
2895
2896 target_chunk = chunk - 1;
2897 target_chunk += start_sample / samples;
2898 chunk_samples = start_sample % samples;
2899
2900 if (start) {
2901 data->pos = (u_char *) entry;
2902
2903 trak->sample_to_chunk_entries = entries;
2904 trak->start_chunk = target_chunk;
2905 trak->start_chunk_samples = chunk_samples;
2906
2907 ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 1);
2908
2909 samples -= chunk_samples;
2910
2911 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2912 "start_chunk:%ui, start_chunk_samples:%ui",
2913 trak->start_chunk, trak->start_chunk_samples);
2914
2915 } else {
2916 if (start_sample) {
2917 data->last = (u_char *) (entry + 1);
2918 trak->sample_to_chunk_entries -= entries - 1;
2919 trak->end_chunk_samples = samples;
2920
2921 } else {
2922 data->last = (u_char *) entry;
2923 trak->sample_to_chunk_entries -= entries;
2924 trak->end_chunk_samples = prev_samples;
2925 }
2926
2927 if (chunk_samples) {
2928 trak->end_chunk = target_chunk + 1;
2929 trak->end_chunk_samples = chunk_samples;
2930
2931 } else {
2932 trak->end_chunk = target_chunk;
2933 }
2934
2935 samples = chunk_samples;
2936 next_chunk = chunk + 1;
2937
2938 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
2939 "end_chunk:%ui, end_chunk_samples:%ui",
2940 trak->end_chunk, trak->end_chunk_samples);
2941 }
2942
2943 if (chunk_samples && next_chunk - target_chunk == 2) {
2944
2945 ngx_mp4_set_32value(entry->samples, samples);
2946
2947 } else if (chunk_samples && start) {
2948
2949 first = &trak->stsc_start_chunk_entry;
2950 ngx_mp4_set_32value(first->chunk, 1);
2951 ngx_mp4_set_32value(first->samples, samples);
2952 ngx_mp4_set_32value(first->id, id);
2953
2954 buf = &trak->stsc_start_chunk_buf;
2955 buf->temporary = 1;
2956 buf->pos = (u_char *) first;
2957 buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t);
2958
2959 trak->out[NGX_HTTP_MP4_STSC_START].buf = buf;
2960
2961 ngx_mp4_set_32value(entry->chunk, trak->start_chunk + 2);
2962
2963 trak->sample_to_chunk_entries++;
2964
2965 } else if (chunk_samples) {
2966
2967 first = &trak->stsc_end_chunk_entry;
2968 ngx_mp4_set_32value(first->chunk, trak->end_chunk - trak->start_chunk);
2969 ngx_mp4_set_32value(first->samples, samples);
2970 ngx_mp4_set_32value(first->id, id);
2971
2972 buf = &trak->stsc_end_chunk_buf;
2973 buf->temporary = 1;
2974 buf->pos = (u_char *) first;
2975 buf->last = (u_char *) first + sizeof(ngx_mp4_stsc_entry_t);
2976
2977 trak->out[NGX_HTTP_MP4_STSC_END].buf = buf;
2978
2979 trak->sample_to_chunk_entries++;
2980 }
2981
2982 return NGX_OK;
2983 }
2984
2985
2986 typedef struct {
2987 u_char size[4];
2988 u_char name[4];
2989 u_char version[1];
2990 u_char flags[3];
2991 u_char uniform_size[4];
2992 u_char entries[4];
2993 } ngx_mp4_stsz_atom_t;
2994
2995
2996 static ngx_int_t
ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)2997 ngx_http_mp4_read_stsz_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
2998 {
2999 u_char *atom_header, *atom_table, *atom_end;
3000 size_t atom_size;
3001 uint32_t entries, size;
3002 ngx_buf_t *atom, *data;
3003 ngx_mp4_stsz_atom_t *stsz_atom;
3004 ngx_http_mp4_trak_t *trak;
3005
3006 /* sample sizes atom */
3007
3008 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stsz atom");
3009
3010 atom_header = ngx_mp4_atom_header(mp4);
3011 stsz_atom = (ngx_mp4_stsz_atom_t *) atom_header;
3012 ngx_mp4_set_atom_name(stsz_atom, 's', 't', 's', 'z');
3013
3014 if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t) > atom_data_size) {
3015 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3016 "\"%s\" mp4 stsz atom too small", mp4->file.name.data);
3017 return NGX_ERROR;
3018 }
3019
3020 size = ngx_mp4_get_32value(stsz_atom->uniform_size);
3021 entries = ngx_mp4_get_32value(stsz_atom->entries);
3022
3023 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3024 "sample uniform size:%uD, entries:%uD", size, entries);
3025
3026 trak = ngx_mp4_last_trak(mp4);
3027 trak->sample_sizes_entries = entries;
3028
3029 atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t);
3030
3031 atom = &trak->stsz_atom_buf;
3032 atom->temporary = 1;
3033 atom->pos = atom_header;
3034 atom->last = atom_table;
3035
3036 trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf = atom;
3037
3038 if (size == 0) {
3039 if (ngx_mp4_atom_data_size(ngx_mp4_stsz_atom_t)
3040 + entries * sizeof(uint32_t) > atom_data_size)
3041 {
3042 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3043 "\"%s\" mp4 stsz atom too small",
3044 mp4->file.name.data);
3045 return NGX_ERROR;
3046 }
3047
3048 atom_end = atom_table + entries * sizeof(uint32_t);
3049
3050 data = &trak->stsz_data_buf;
3051 data->temporary = 1;
3052 data->pos = atom_table;
3053 data->last = atom_end;
3054
3055 trak->out[NGX_HTTP_MP4_STSZ_DATA].buf = data;
3056
3057 } else {
3058 /* if size != 0 then all samples are the same size */
3059 /* TODO : chunk samples */
3060 atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
3061 ngx_mp4_set_32value(atom_header, atom_size);
3062 trak->size += atom_size;
3063 }
3064
3065 ngx_mp4_atom_next(mp4, atom_data_size);
3066
3067 return NGX_OK;
3068 }
3069
3070
3071 static ngx_int_t
ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3072 ngx_http_mp4_update_stsz_atom(ngx_http_mp4_file_t *mp4,
3073 ngx_http_mp4_trak_t *trak)
3074 {
3075 size_t atom_size;
3076 uint32_t *pos, *end, entries;
3077 ngx_buf_t *atom, *data;
3078 ngx_mp4_stsz_atom_t *stsz_atom;
3079
3080 /*
3081 * mdia.minf.stbl.stsz updating requires trak->start_sample
3082 * from mdia.minf.stbl.stts which depends on value from mdia.mdhd
3083 * atom which may reside after mdia.minf
3084 */
3085
3086 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3087 "mp4 stsz atom update");
3088
3089 data = trak->out[NGX_HTTP_MP4_STSZ_DATA].buf;
3090
3091 if (data) {
3092 entries = trak->sample_sizes_entries;
3093
3094 if (trak->start_sample > entries) {
3095 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3096 "start time is out mp4 stsz samples in \"%s\"",
3097 mp4->file.name.data);
3098 return NGX_ERROR;
3099 }
3100
3101 entries -= trak->start_sample;
3102 data->pos += trak->start_sample * sizeof(uint32_t);
3103 end = (uint32_t *) data->pos;
3104
3105 for (pos = end - trak->start_chunk_samples; pos < end; pos++) {
3106 trak->start_chunk_samples_size += ngx_mp4_get_32value(pos);
3107 }
3108
3109 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3110 "chunk samples sizes:%uL",
3111 trak->start_chunk_samples_size);
3112
3113 if (trak->start_chunk_samples_size > (uint64_t) mp4->end) {
3114 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3115 "too large mp4 start samples size in \"%s\"",
3116 mp4->file.name.data);
3117 return NGX_ERROR;
3118 }
3119
3120 if (mp4->length) {
3121 if (trak->end_sample - trak->start_sample > entries) {
3122 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3123 "end time is out mp4 stsz samples in \"%s\"",
3124 mp4->file.name.data);
3125 return NGX_ERROR;
3126 }
3127
3128 entries = trak->end_sample - trak->start_sample;
3129 data->last = data->pos + entries * sizeof(uint32_t);
3130 end = (uint32_t *) data->last;
3131
3132 for (pos = end - trak->end_chunk_samples; pos < end; pos++) {
3133 trak->end_chunk_samples_size += ngx_mp4_get_32value(pos);
3134 }
3135
3136 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3137 "mp4 stsz end_chunk_samples_size:%uL",
3138 trak->end_chunk_samples_size);
3139
3140 if (trak->end_chunk_samples_size > (uint64_t) mp4->end) {
3141 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3142 "too large mp4 end samples size in \"%s\"",
3143 mp4->file.name.data);
3144 return NGX_ERROR;
3145 }
3146 }
3147
3148 atom_size = sizeof(ngx_mp4_stsz_atom_t) + (data->last - data->pos);
3149 trak->size += atom_size;
3150
3151 atom = trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf;
3152 stsz_atom = (ngx_mp4_stsz_atom_t *) atom->pos;
3153
3154 ngx_mp4_set_32value(stsz_atom->size, atom_size);
3155 ngx_mp4_set_32value(stsz_atom->entries, entries);
3156 }
3157
3158 return NGX_OK;
3159 }
3160
3161
3162 typedef struct {
3163 u_char size[4];
3164 u_char name[4];
3165 u_char version[1];
3166 u_char flags[3];
3167 u_char entries[4];
3168 } ngx_mp4_stco_atom_t;
3169
3170
3171 static ngx_int_t
ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)3172 ngx_http_mp4_read_stco_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
3173 {
3174 u_char *atom_header, *atom_table, *atom_end;
3175 uint32_t entries;
3176 ngx_buf_t *atom, *data;
3177 ngx_mp4_stco_atom_t *stco_atom;
3178 ngx_http_mp4_trak_t *trak;
3179
3180 /* chunk offsets atom */
3181
3182 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 stco atom");
3183
3184 atom_header = ngx_mp4_atom_header(mp4);
3185 stco_atom = (ngx_mp4_stco_atom_t *) atom_header;
3186 ngx_mp4_set_atom_name(stco_atom, 's', 't', 'c', 'o');
3187
3188 if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t) > atom_data_size) {
3189 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3190 "\"%s\" mp4 stco atom too small", mp4->file.name.data);
3191 return NGX_ERROR;
3192 }
3193
3194 entries = ngx_mp4_get_32value(stco_atom->entries);
3195
3196 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
3197
3198 if (ngx_mp4_atom_data_size(ngx_mp4_stco_atom_t)
3199 + entries * sizeof(uint32_t) > atom_data_size)
3200 {
3201 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3202 "\"%s\" mp4 stco atom too small", mp4->file.name.data);
3203 return NGX_ERROR;
3204 }
3205
3206 atom_table = atom_header + sizeof(ngx_mp4_stco_atom_t);
3207 atom_end = atom_table + entries * sizeof(uint32_t);
3208
3209 trak = ngx_mp4_last_trak(mp4);
3210 trak->chunks = entries;
3211
3212 atom = &trak->stco_atom_buf;
3213 atom->temporary = 1;
3214 atom->pos = atom_header;
3215 atom->last = atom_table;
3216
3217 data = &trak->stco_data_buf;
3218 data->temporary = 1;
3219 data->pos = atom_table;
3220 data->last = atom_end;
3221
3222 trak->out[NGX_HTTP_MP4_STCO_ATOM].buf = atom;
3223 trak->out[NGX_HTTP_MP4_STCO_DATA].buf = data;
3224
3225 ngx_mp4_atom_next(mp4, atom_data_size);
3226
3227 return NGX_OK;
3228 }
3229
3230
3231 static ngx_int_t
ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3232 ngx_http_mp4_update_stco_atom(ngx_http_mp4_file_t *mp4,
3233 ngx_http_mp4_trak_t *trak)
3234 {
3235 size_t atom_size;
3236 uint32_t entries;
3237 uint64_t chunk_offset, samples_size;
3238 ngx_buf_t *atom, *data;
3239 ngx_mp4_stco_atom_t *stco_atom;
3240
3241 /*
3242 * mdia.minf.stbl.stco updating requires trak->start_chunk
3243 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
3244 * atom which may reside after mdia.minf
3245 */
3246
3247 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3248 "mp4 stco atom update");
3249
3250 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
3251
3252 if (data == NULL) {
3253 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3254 "no mp4 stco atoms were found in \"%s\"",
3255 mp4->file.name.data);
3256 return NGX_ERROR;
3257 }
3258
3259 if (trak->start_chunk > trak->chunks) {
3260 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3261 "start time is out mp4 stco chunks in \"%s\"",
3262 mp4->file.name.data);
3263 return NGX_ERROR;
3264 }
3265
3266 data->pos += trak->start_chunk * sizeof(uint32_t);
3267
3268 chunk_offset = ngx_mp4_get_32value(data->pos);
3269 samples_size = trak->start_chunk_samples_size;
3270
3271 if (chunk_offset > (uint64_t) mp4->end - samples_size
3272 || chunk_offset + samples_size > NGX_MAX_UINT32_VALUE)
3273 {
3274 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3275 "too large chunk offset in \"%s\"",
3276 mp4->file.name.data);
3277 return NGX_ERROR;
3278 }
3279
3280 trak->start_offset = chunk_offset + samples_size;
3281 ngx_mp4_set_32value(data->pos, trak->start_offset);
3282
3283 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3284 "start chunk offset:%O", trak->start_offset);
3285
3286 if (mp4->length) {
3287
3288 if (trak->end_chunk > trak->chunks) {
3289 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3290 "end time is out mp4 stco chunks in \"%s\"",
3291 mp4->file.name.data);
3292 return NGX_ERROR;
3293 }
3294
3295 entries = trak->end_chunk - trak->start_chunk;
3296 data->last = data->pos + entries * sizeof(uint32_t);
3297
3298 if (entries) {
3299 chunk_offset = ngx_mp4_get_32value(data->last - sizeof(uint32_t));
3300 samples_size = trak->end_chunk_samples_size;
3301
3302 if (chunk_offset > (uint64_t) mp4->end - samples_size
3303 || chunk_offset + samples_size > NGX_MAX_UINT32_VALUE)
3304 {
3305 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3306 "too large chunk offset in \"%s\"",
3307 mp4->file.name.data);
3308 return NGX_ERROR;
3309 }
3310
3311 trak->end_offset = chunk_offset + samples_size;
3312
3313 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3314 "end chunk offset:%O", trak->end_offset);
3315 }
3316
3317 } else {
3318 entries = trak->chunks - trak->start_chunk;
3319 trak->end_offset = mp4->mdat_data.buf->file_last;
3320 }
3321
3322 if (entries == 0) {
3323 trak->start_offset = mp4->end;
3324 trak->end_offset = 0;
3325 }
3326
3327 atom_size = sizeof(ngx_mp4_stco_atom_t) + (data->last - data->pos);
3328 trak->size += atom_size;
3329
3330 atom = trak->out[NGX_HTTP_MP4_STCO_ATOM].buf;
3331 stco_atom = (ngx_mp4_stco_atom_t *) atom->pos;
3332
3333 ngx_mp4_set_32value(stco_atom->size, atom_size);
3334 ngx_mp4_set_32value(stco_atom->entries, entries);
3335
3336 return NGX_OK;
3337 }
3338
3339
3340 static void
ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,int32_t adjustment)3341 ngx_http_mp4_adjust_stco_atom(ngx_http_mp4_file_t *mp4,
3342 ngx_http_mp4_trak_t *trak, int32_t adjustment)
3343 {
3344 uint32_t offset, *entry, *end;
3345 ngx_buf_t *data;
3346
3347 /*
3348 * moov.trak.mdia.minf.stbl.stco adjustment requires
3349 * minimal start offset of all traks and new moov atom size
3350 */
3351
3352 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3353 "mp4 stco atom adjustment");
3354
3355 data = trak->out[NGX_HTTP_MP4_STCO_DATA].buf;
3356 entry = (uint32_t *) data->pos;
3357 end = (uint32_t *) data->last;
3358
3359 while (entry < end) {
3360 offset = ngx_mp4_get_32value(entry);
3361 offset += adjustment;
3362 ngx_mp4_set_32value(entry, offset);
3363 entry++;
3364 }
3365 }
3366
3367
3368 typedef struct {
3369 u_char size[4];
3370 u_char name[4];
3371 u_char version[1];
3372 u_char flags[3];
3373 u_char entries[4];
3374 } ngx_mp4_co64_atom_t;
3375
3376
3377 static ngx_int_t
ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t * mp4,uint64_t atom_data_size)3378 ngx_http_mp4_read_co64_atom(ngx_http_mp4_file_t *mp4, uint64_t atom_data_size)
3379 {
3380 u_char *atom_header, *atom_table, *atom_end;
3381 uint32_t entries;
3382 ngx_buf_t *atom, *data;
3383 ngx_mp4_co64_atom_t *co64_atom;
3384 ngx_http_mp4_trak_t *trak;
3385
3386 /* chunk offsets atom */
3387
3388 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 co64 atom");
3389
3390 atom_header = ngx_mp4_atom_header(mp4);
3391 co64_atom = (ngx_mp4_co64_atom_t *) atom_header;
3392 ngx_mp4_set_atom_name(co64_atom, 'c', 'o', '6', '4');
3393
3394 if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t) > atom_data_size) {
3395 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3396 "\"%s\" mp4 co64 atom too small", mp4->file.name.data);
3397 return NGX_ERROR;
3398 }
3399
3400 entries = ngx_mp4_get_32value(co64_atom->entries);
3401
3402 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "chunks:%uD", entries);
3403
3404 if (ngx_mp4_atom_data_size(ngx_mp4_co64_atom_t)
3405 + entries * sizeof(uint64_t) > atom_data_size)
3406 {
3407 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3408 "\"%s\" mp4 co64 atom too small", mp4->file.name.data);
3409 return NGX_ERROR;
3410 }
3411
3412 atom_table = atom_header + sizeof(ngx_mp4_co64_atom_t);
3413 atom_end = atom_table + entries * sizeof(uint64_t);
3414
3415 trak = ngx_mp4_last_trak(mp4);
3416 trak->chunks = entries;
3417
3418 atom = &trak->co64_atom_buf;
3419 atom->temporary = 1;
3420 atom->pos = atom_header;
3421 atom->last = atom_table;
3422
3423 data = &trak->co64_data_buf;
3424 data->temporary = 1;
3425 data->pos = atom_table;
3426 data->last = atom_end;
3427
3428 trak->out[NGX_HTTP_MP4_CO64_ATOM].buf = atom;
3429 trak->out[NGX_HTTP_MP4_CO64_DATA].buf = data;
3430
3431 ngx_mp4_atom_next(mp4, atom_data_size);
3432
3433 return NGX_OK;
3434 }
3435
3436
3437 static ngx_int_t
ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak)3438 ngx_http_mp4_update_co64_atom(ngx_http_mp4_file_t *mp4,
3439 ngx_http_mp4_trak_t *trak)
3440 {
3441 size_t atom_size;
3442 uint64_t entries, chunk_offset, samples_size;
3443 ngx_buf_t *atom, *data;
3444 ngx_mp4_co64_atom_t *co64_atom;
3445
3446 /*
3447 * mdia.minf.stbl.co64 updating requires trak->start_chunk
3448 * from mdia.minf.stbl.stsc which depends on value from mdia.mdhd
3449 * atom which may reside after mdia.minf
3450 */
3451
3452 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3453 "mp4 co64 atom update");
3454
3455 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
3456
3457 if (data == NULL) {
3458 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3459 "no mp4 co64 atoms were found in \"%s\"",
3460 mp4->file.name.data);
3461 return NGX_ERROR;
3462 }
3463
3464 if (trak->start_chunk > trak->chunks) {
3465 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3466 "start time is out mp4 co64 chunks in \"%s\"",
3467 mp4->file.name.data);
3468 return NGX_ERROR;
3469 }
3470
3471 data->pos += trak->start_chunk * sizeof(uint64_t);
3472
3473 chunk_offset = ngx_mp4_get_64value(data->pos);
3474 samples_size = trak->start_chunk_samples_size;
3475
3476 if (chunk_offset > (uint64_t) mp4->end - samples_size) {
3477 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3478 "too large chunk offset in \"%s\"",
3479 mp4->file.name.data);
3480 return NGX_ERROR;
3481 }
3482
3483 trak->start_offset = chunk_offset + samples_size;
3484 ngx_mp4_set_64value(data->pos, trak->start_offset);
3485
3486 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3487 "start chunk offset:%O", trak->start_offset);
3488
3489 if (mp4->length) {
3490
3491 if (trak->end_chunk > trak->chunks) {
3492 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3493 "end time is out mp4 co64 chunks in \"%s\"",
3494 mp4->file.name.data);
3495 return NGX_ERROR;
3496 }
3497
3498 entries = trak->end_chunk - trak->start_chunk;
3499 data->last = data->pos + entries * sizeof(uint64_t);
3500
3501 if (entries) {
3502 chunk_offset = ngx_mp4_get_64value(data->last - sizeof(uint64_t));
3503 samples_size = trak->end_chunk_samples_size;
3504
3505 if (chunk_offset > (uint64_t) mp4->end - samples_size) {
3506 ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
3507 "too large chunk offset in \"%s\"",
3508 mp4->file.name.data);
3509 return NGX_ERROR;
3510 }
3511
3512 trak->end_offset = chunk_offset + samples_size;
3513
3514 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3515 "end chunk offset:%O", trak->end_offset);
3516 }
3517
3518 } else {
3519 entries = trak->chunks - trak->start_chunk;
3520 trak->end_offset = mp4->mdat_data.buf->file_last;
3521 }
3522
3523 if (entries == 0) {
3524 trak->start_offset = mp4->end;
3525 trak->end_offset = 0;
3526 }
3527
3528 atom_size = sizeof(ngx_mp4_co64_atom_t) + (data->last - data->pos);
3529 trak->size += atom_size;
3530
3531 atom = trak->out[NGX_HTTP_MP4_CO64_ATOM].buf;
3532 co64_atom = (ngx_mp4_co64_atom_t *) atom->pos;
3533
3534 ngx_mp4_set_32value(co64_atom->size, atom_size);
3535 ngx_mp4_set_32value(co64_atom->entries, entries);
3536
3537 return NGX_OK;
3538 }
3539
3540
3541 static void
ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t * mp4,ngx_http_mp4_trak_t * trak,off_t adjustment)3542 ngx_http_mp4_adjust_co64_atom(ngx_http_mp4_file_t *mp4,
3543 ngx_http_mp4_trak_t *trak, off_t adjustment)
3544 {
3545 uint64_t offset, *entry, *end;
3546 ngx_buf_t *data;
3547
3548 /*
3549 * moov.trak.mdia.minf.stbl.co64 adjustment requires
3550 * minimal start offset of all traks and new moov atom size
3551 */
3552
3553 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0,
3554 "mp4 co64 atom adjustment");
3555
3556 data = trak->out[NGX_HTTP_MP4_CO64_DATA].buf;
3557 entry = (uint64_t *) data->pos;
3558 end = (uint64_t *) data->last;
3559
3560 while (entry < end) {
3561 offset = ngx_mp4_get_64value(entry);
3562 offset += adjustment;
3563 ngx_mp4_set_64value(entry, offset);
3564 entry++;
3565 }
3566 }
3567
3568
3569 static char *
ngx_http_mp4(ngx_conf_t * cf,ngx_command_t * cmd,void * conf)3570 ngx_http_mp4(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
3571 {
3572 ngx_http_core_loc_conf_t *clcf;
3573
3574 clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
3575 clcf->handler = ngx_http_mp4_handler;
3576
3577 return NGX_CONF_OK;
3578 }
3579
3580
3581 static void *
ngx_http_mp4_create_conf(ngx_conf_t * cf)3582 ngx_http_mp4_create_conf(ngx_conf_t *cf)
3583 {
3584 ngx_http_mp4_conf_t *conf;
3585
3586 conf = ngx_palloc(cf->pool, sizeof(ngx_http_mp4_conf_t));
3587 if (conf == NULL) {
3588 return NULL;
3589 }
3590
3591 conf->buffer_size = NGX_CONF_UNSET_SIZE;
3592 conf->max_buffer_size = NGX_CONF_UNSET_SIZE;
3593
3594 return conf;
3595 }
3596
3597
3598 static char *
ngx_http_mp4_merge_conf(ngx_conf_t * cf,void * parent,void * child)3599 ngx_http_mp4_merge_conf(ngx_conf_t *cf, void *parent, void *child)
3600 {
3601 ngx_http_mp4_conf_t *prev = parent;
3602 ngx_http_mp4_conf_t *conf = child;
3603
3604 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size, 512 * 1024);
3605 ngx_conf_merge_size_value(conf->max_buffer_size, prev->max_buffer_size,
3606 10 * 1024 * 1024);
3607
3608 return NGX_CONF_OK;
3609 }
3610