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1 | /* |
2 | * copyright (c) 2007 Luca Abeni | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <string.h> | |
22 | #include "libavutil/avstring.h" | |
23 | #include "libavutil/base64.h" | |
24 | #include "libavutil/dict.h" | |
25 | #include "libavutil/parseutils.h" | |
26 | #include "libavutil/opt.h" | |
27 | #include "libavcodec/xiph.h" | |
28 | #include "libavcodec/mpeg4audio.h" | |
29 | #include "avformat.h" | |
30 | #include "internal.h" | |
31 | #include "avc.h" | |
32 | #include "rtp.h" | |
33 | #if CONFIG_NETWORK | |
34 | #include "network.h" | |
35 | #endif | |
36 | ||
37 | #if CONFIG_RTP_MUXER | |
38 | #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2) | |
39 | ||
40 | struct sdp_session_level { | |
41 | int sdp_version; /**< protocol version (currently 0) */ | |
42 | int id; /**< session ID */ | |
43 | int version; /**< session version */ | |
44 | int start_time; /**< session start time (NTP time, in seconds), | |
45 | or 0 in case of permanent session */ | |
46 | int end_time; /**< session end time (NTP time, in seconds), | |
47 | or 0 if the session is not bounded */ | |
48 | int ttl; /**< TTL, in case of multicast stream */ | |
49 | const char *user; /**< username of the session's creator */ | |
50 | const char *src_addr; /**< IP address of the machine from which the session was created */ | |
51 | const char *src_type; /**< address type of src_addr */ | |
52 | const char *dst_addr; /**< destination IP address (can be multicast) */ | |
53 | const char *dst_type; /**< destination IP address type */ | |
54 | const char *name; /**< session name (can be an empty string) */ | |
55 | }; | |
56 | ||
57 | static void sdp_write_address(char *buff, int size, const char *dest_addr, | |
58 | const char *dest_type, int ttl) | |
59 | { | |
60 | if (dest_addr) { | |
61 | if (!dest_type) | |
62 | dest_type = "IP4"; | |
63 | if (ttl > 0 && !strcmp(dest_type, "IP4")) { | |
64 | /* The TTL should only be specified for IPv4 multicast addresses, | |
65 | * not for IPv6. */ | |
66 | av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl); | |
67 | } else { | |
68 | av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr); | |
69 | } | |
70 | } | |
71 | } | |
72 | ||
73 | static void sdp_write_header(char *buff, int size, struct sdp_session_level *s) | |
74 | { | |
75 | av_strlcatf(buff, size, "v=%d\r\n" | |
76 | "o=- %d %d IN %s %s\r\n" | |
77 | "s=%s\r\n", | |
78 | s->sdp_version, | |
79 | s->id, s->version, s->src_type, s->src_addr, | |
80 | s->name); | |
81 | sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl); | |
82 | av_strlcatf(buff, size, "t=%d %d\r\n" | |
83 | "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n", | |
84 | s->start_time, s->end_time); | |
85 | } | |
86 | ||
87 | #if CONFIG_NETWORK | |
88 | static int resolve_destination(char *dest_addr, int size, char *type, | |
89 | int type_size) | |
90 | { | |
91 | struct addrinfo hints = { 0 }, *ai; | |
92 | int is_multicast; | |
93 | ||
94 | av_strlcpy(type, "IP4", type_size); | |
95 | if (!dest_addr[0]) | |
96 | return 0; | |
97 | ||
98 | /* Resolve the destination, since it must be written | |
99 | * as a numeric IP address in the SDP. */ | |
100 | ||
101 | if (getaddrinfo(dest_addr, NULL, &hints, &ai)) | |
102 | return 0; | |
103 | getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size, | |
104 | NULL, 0, NI_NUMERICHOST); | |
105 | #ifdef AF_INET6 | |
106 | if (ai->ai_family == AF_INET6) | |
107 | av_strlcpy(type, "IP6", type_size); | |
108 | #endif | |
109 | is_multicast = ff_is_multicast_address(ai->ai_addr); | |
110 | freeaddrinfo(ai); | |
111 | return is_multicast; | |
112 | } | |
113 | #else | |
114 | static int resolve_destination(char *dest_addr, int size, char *type, | |
115 | int type_size) | |
116 | { | |
117 | return 0; | |
118 | } | |
119 | #endif | |
120 | ||
121 | static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url) | |
122 | { | |
123 | int port; | |
124 | const char *p; | |
125 | char proto[32]; | |
126 | ||
127 | av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url); | |
128 | ||
129 | *ttl = 0; | |
130 | ||
131 | if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) { | |
132 | /* The url isn't for the actual rtp sessions, | |
133 | * don't parse out anything else than the destination. | |
134 | */ | |
135 | return 0; | |
136 | } | |
137 | ||
138 | p = strchr(url, '?'); | |
139 | if (p) { | |
140 | char buff[64]; | |
141 | ||
142 | if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) { | |
143 | *ttl = strtol(buff, NULL, 10); | |
144 | } else { | |
145 | *ttl = 5; | |
146 | } | |
147 | } | |
148 | ||
149 | return port; | |
150 | } | |
151 | ||
152 | #define MAX_PSET_SIZE 1024 | |
153 | static char *extradata2psets(AVCodecContext *c) | |
154 | { | |
155 | char *psets, *p; | |
156 | const uint8_t *r; | |
157 | static const char pset_string[] = "; sprop-parameter-sets="; | |
158 | static const char profile_string[] = "; profile-level-id="; | |
159 | uint8_t *orig_extradata = NULL; | |
160 | int orig_extradata_size = 0; | |
161 | const uint8_t *sps = NULL, *sps_end; | |
162 | ||
163 | if (c->extradata_size > MAX_EXTRADATA_SIZE) { | |
164 | av_log(c, AV_LOG_ERROR, "Too much extradata!\n"); | |
165 | ||
166 | return NULL; | |
167 | } | |
168 | if (c->extradata[0] == 1) { | |
169 | uint8_t *dummy_p; | |
170 | int dummy_int; | |
171 | AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb"); | |
172 | ||
173 | if (!bsfc) { | |
174 | av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n"); | |
175 | ||
176 | return NULL; | |
177 | } | |
178 | ||
179 | orig_extradata_size = c->extradata_size; | |
180 | orig_extradata = av_mallocz(orig_extradata_size + | |
181 | FF_INPUT_BUFFER_PADDING_SIZE); | |
182 | if (!orig_extradata) { | |
183 | av_bitstream_filter_close(bsfc); | |
184 | return NULL; | |
185 | } | |
186 | memcpy(orig_extradata, c->extradata, orig_extradata_size); | |
187 | av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0); | |
188 | av_bitstream_filter_close(bsfc); | |
189 | } | |
190 | ||
191 | psets = av_mallocz(MAX_PSET_SIZE); | |
192 | if (!psets) { | |
193 | av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n"); | |
194 | av_free(orig_extradata); | |
195 | return NULL; | |
196 | } | |
197 | memcpy(psets, pset_string, strlen(pset_string)); | |
198 | p = psets + strlen(pset_string); | |
199 | r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size); | |
200 | while (r < c->extradata + c->extradata_size) { | |
201 | const uint8_t *r1; | |
202 | uint8_t nal_type; | |
203 | ||
204 | while (!*(r++)); | |
205 | nal_type = *r & 0x1f; | |
206 | r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size); | |
207 | if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */ | |
208 | r = r1; | |
209 | continue; | |
210 | } | |
211 | if (p != (psets + strlen(pset_string))) { | |
212 | *p = ','; | |
213 | p++; | |
214 | } | |
215 | if (!sps) { | |
216 | sps = r; | |
217 | sps_end = r1; | |
218 | } | |
219 | if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) { | |
220 | av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r); | |
221 | av_free(psets); | |
222 | ||
223 | return NULL; | |
224 | } | |
225 | p += strlen(p); | |
226 | r = r1; | |
227 | } | |
228 | if (sps && sps_end - sps >= 4) { | |
229 | memcpy(p, profile_string, strlen(profile_string)); | |
230 | p += strlen(p); | |
231 | ff_data_to_hex(p, sps + 1, 3, 0); | |
232 | p[6] = '\0'; | |
233 | } | |
234 | if (orig_extradata) { | |
235 | av_free(c->extradata); | |
236 | c->extradata = orig_extradata; | |
237 | c->extradata_size = orig_extradata_size; | |
238 | } | |
239 | ||
240 | return psets; | |
241 | } | |
242 | ||
243 | static char *extradata2config(AVCodecContext *c) | |
244 | { | |
245 | char *config; | |
246 | ||
247 | if (c->extradata_size > MAX_EXTRADATA_SIZE) { | |
248 | av_log(c, AV_LOG_ERROR, "Too much extradata!\n"); | |
249 | ||
250 | return NULL; | |
251 | } | |
252 | config = av_malloc(10 + c->extradata_size * 2); | |
253 | if (!config) { | |
254 | av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n"); | |
255 | return NULL; | |
256 | } | |
257 | memcpy(config, "; config=", 9); | |
258 | ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0); | |
259 | config[9 + c->extradata_size * 2] = 0; | |
260 | ||
261 | return config; | |
262 | } | |
263 | ||
264 | static char *xiph_extradata2config(AVCodecContext *c) | |
265 | { | |
266 | char *config, *encoded_config; | |
267 | uint8_t *header_start[3]; | |
268 | int headers_len, header_len[3], config_len; | |
269 | int first_header_size; | |
270 | ||
271 | switch (c->codec_id) { | |
272 | case AV_CODEC_ID_THEORA: | |
273 | first_header_size = 42; | |
274 | break; | |
275 | case AV_CODEC_ID_VORBIS: | |
276 | first_header_size = 30; | |
277 | break; | |
278 | default: | |
279 | av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n"); | |
280 | return NULL; | |
281 | } | |
282 | ||
283 | if (avpriv_split_xiph_headers(c->extradata, c->extradata_size, | |
284 | first_header_size, header_start, | |
285 | header_len) < 0) { | |
286 | av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n"); | |
287 | return NULL; | |
288 | } | |
289 | ||
290 | headers_len = header_len[0] + header_len[2]; | |
291 | config_len = 4 + // count | |
292 | 3 + // ident | |
293 | 2 + // packet size | |
294 | 1 + // header count | |
295 | 2 + // header size | |
296 | headers_len; // and the rest | |
297 | ||
298 | config = av_malloc(config_len); | |
299 | if (!config) | |
300 | goto xiph_fail; | |
301 | ||
302 | encoded_config = av_malloc(AV_BASE64_SIZE(config_len)); | |
303 | if (!encoded_config) { | |
304 | av_free(config); | |
305 | goto xiph_fail; | |
306 | } | |
307 | ||
308 | config[0] = config[1] = config[2] = 0; | |
309 | config[3] = 1; | |
310 | config[4] = (RTP_XIPH_IDENT >> 16) & 0xff; | |
311 | config[5] = (RTP_XIPH_IDENT >> 8) & 0xff; | |
312 | config[6] = (RTP_XIPH_IDENT ) & 0xff; | |
313 | config[7] = (headers_len >> 8) & 0xff; | |
314 | config[8] = headers_len & 0xff; | |
315 | config[9] = 2; | |
316 | config[10] = header_len[0]; | |
317 | config[11] = 0; // size of comment header; nonexistent | |
318 | memcpy(config + 12, header_start[0], header_len[0]); | |
319 | memcpy(config + 12 + header_len[0], header_start[2], header_len[2]); | |
320 | ||
321 | av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len), | |
322 | config, config_len); | |
323 | av_free(config); | |
324 | ||
325 | return encoded_config; | |
326 | ||
327 | xiph_fail: | |
328 | av_log(c, AV_LOG_ERROR, | |
329 | "Not enough memory for configuration string\n"); | |
330 | return NULL; | |
331 | } | |
332 | ||
333 | static int latm_context2profilelevel(AVCodecContext *c) | |
334 | { | |
335 | /* MP4A-LATM | |
336 | * The RTP payload format specification is described in RFC 3016 | |
337 | * The encoding specifications are provided in ISO/IEC 14496-3 */ | |
338 | ||
339 | int profile_level = 0x2B; | |
340 | ||
341 | /* TODO: AAC Profile only supports AAC LC Object Type. | |
342 | * Different Object Types should implement different Profile Levels */ | |
343 | ||
344 | if (c->sample_rate <= 24000) { | |
345 | if (c->channels <= 2) | |
346 | profile_level = 0x28; // AAC Profile, Level 1 | |
347 | } else if (c->sample_rate <= 48000) { | |
348 | if (c->channels <= 2) { | |
349 | profile_level = 0x29; // AAC Profile, Level 2 | |
350 | } else if (c->channels <= 5) { | |
351 | profile_level = 0x2A; // AAC Profile, Level 4 | |
352 | } | |
353 | } else if (c->sample_rate <= 96000) { | |
354 | if (c->channels <= 5) { | |
355 | profile_level = 0x2B; // AAC Profile, Level 5 | |
356 | } | |
357 | } | |
358 | ||
359 | return profile_level; | |
360 | } | |
361 | ||
362 | static char *latm_context2config(AVCodecContext *c) | |
363 | { | |
364 | /* MP4A-LATM | |
365 | * The RTP payload format specification is described in RFC 3016 | |
366 | * The encoding specifications are provided in ISO/IEC 14496-3 */ | |
367 | ||
368 | uint8_t config_byte[6]; | |
369 | int rate_index; | |
370 | char *config; | |
371 | ||
372 | for (rate_index = 0; rate_index < 16; rate_index++) | |
373 | if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate) | |
374 | break; | |
375 | if (rate_index == 16) { | |
376 | av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n"); | |
377 | return NULL; | |
378 | } | |
379 | ||
380 | config_byte[0] = 0x40; | |
381 | config_byte[1] = 0; | |
382 | config_byte[2] = 0x20 | rate_index; | |
383 | config_byte[3] = c->channels << 4; | |
384 | config_byte[4] = 0x3f; | |
385 | config_byte[5] = 0xc0; | |
386 | ||
387 | config = av_malloc(6*2+1); | |
388 | if (!config) { | |
389 | av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n"); | |
390 | return NULL; | |
391 | } | |
392 | ff_data_to_hex(config, config_byte, 6, 1); | |
393 | config[12] = 0; | |
394 | ||
395 | return config; | |
396 | } | |
397 | ||
398 | static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt) | |
399 | { | |
400 | char *config = NULL; | |
401 | ||
402 | switch (c->codec_id) { | |
403 | case AV_CODEC_ID_H264: { | |
404 | int mode = 1; | |
405 | if (fmt && fmt->oformat && fmt->oformat->priv_class && | |
406 | av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0")) | |
407 | mode = 0; | |
408 | if (c->extradata_size) { | |
409 | config = extradata2psets(c); | |
410 | } | |
411 | av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n" | |
412 | "a=fmtp:%d packetization-mode=%d%s\r\n", | |
413 | payload_type, | |
414 | payload_type, mode, config ? config : ""); | |
415 | break; | |
416 | } | |
417 | case AV_CODEC_ID_H261: | |
418 | { | |
419 | const char *pic_fmt = NULL; | |
420 | /* only QCIF and CIF are specified as supported in RFC 4587 */ | |
421 | if (c->width == 176 && c->height == 144) | |
422 | pic_fmt = "QCIF=1"; | |
423 | if (c->width == 352 && c->height == 288) | |
424 | pic_fmt = "CIF=1"; | |
425 | av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type); | |
426 | if (pic_fmt) | |
427 | av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt); | |
428 | break; | |
429 | } | |
430 | case AV_CODEC_ID_H263: | |
431 | case AV_CODEC_ID_H263P: | |
432 | /* a=framesize is required by 3GPP TS 26.234 (PSS). It | |
433 | * actually specifies the maximum video size, but we only know | |
434 | * the current size. This is required for playback on Android | |
435 | * stagefright and on Samsung bada. */ | |
436 | if (!fmt || !fmt->oformat->priv_class || | |
437 | !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") || | |
438 | c->codec_id == AV_CODEC_ID_H263P) | |
439 | av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n" | |
440 | "a=framesize:%d %d-%d\r\n", | |
441 | payload_type, | |
442 | payload_type, c->width, c->height); | |
443 | break; | |
444 | case AV_CODEC_ID_MPEG4: | |
445 | if (c->extradata_size) { | |
446 | config = extradata2config(c); | |
447 | } | |
448 | av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n" | |
449 | "a=fmtp:%d profile-level-id=1%s\r\n", | |
450 | payload_type, | |
451 | payload_type, config ? config : ""); | |
452 | break; | |
453 | case AV_CODEC_ID_AAC: | |
454 | if (fmt && fmt->oformat && fmt->oformat->priv_class && | |
455 | av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) { | |
456 | config = latm_context2config(c); | |
457 | if (!config) | |
458 | return NULL; | |
459 | av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n" | |
460 | "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n", | |
461 | payload_type, c->sample_rate, c->channels, | |
462 | payload_type, latm_context2profilelevel(c), config); | |
463 | } else { | |
464 | if (c->extradata_size) { | |
465 | config = extradata2config(c); | |
466 | } else { | |
467 | /* FIXME: maybe we can forge config information based on the | |
468 | * codec parameters... | |
469 | */ | |
470 | av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n"); | |
471 | return NULL; | |
472 | } | |
473 | if (!config) { | |
474 | return NULL; | |
475 | } | |
476 | av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n" | |
477 | "a=fmtp:%d profile-level-id=1;" | |
478 | "mode=AAC-hbr;sizelength=13;indexlength=3;" | |
479 | "indexdeltalength=3%s\r\n", | |
480 | payload_type, c->sample_rate, c->channels, | |
481 | payload_type, config); | |
482 | } | |
483 | break; | |
484 | case AV_CODEC_ID_PCM_S16BE: | |
485 | if (payload_type >= RTP_PT_PRIVATE) | |
486 | av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n", | |
487 | payload_type, | |
488 | c->sample_rate, c->channels); | |
489 | break; | |
490 | case AV_CODEC_ID_PCM_MULAW: | |
491 | if (payload_type >= RTP_PT_PRIVATE) | |
492 | av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n", | |
493 | payload_type, | |
494 | c->sample_rate, c->channels); | |
495 | break; | |
496 | case AV_CODEC_ID_PCM_ALAW: | |
497 | if (payload_type >= RTP_PT_PRIVATE) | |
498 | av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n", | |
499 | payload_type, | |
500 | c->sample_rate, c->channels); | |
501 | break; | |
502 | case AV_CODEC_ID_AMR_NB: | |
503 | av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n" | |
504 | "a=fmtp:%d octet-align=1\r\n", | |
505 | payload_type, c->sample_rate, c->channels, | |
506 | payload_type); | |
507 | break; | |
508 | case AV_CODEC_ID_AMR_WB: | |
509 | av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n" | |
510 | "a=fmtp:%d octet-align=1\r\n", | |
511 | payload_type, c->sample_rate, c->channels, | |
512 | payload_type); | |
513 | break; | |
514 | case AV_CODEC_ID_VORBIS: | |
515 | if (c->extradata_size) | |
516 | config = xiph_extradata2config(c); | |
517 | else | |
518 | av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n"); | |
519 | if (!config) | |
520 | return NULL; | |
521 | ||
522 | av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n" | |
523 | "a=fmtp:%d configuration=%s\r\n", | |
524 | payload_type, c->sample_rate, c->channels, | |
525 | payload_type, config); | |
526 | break; | |
527 | case AV_CODEC_ID_THEORA: { | |
528 | const char *pix_fmt; | |
529 | switch (c->pix_fmt) { | |
530 | case AV_PIX_FMT_YUV420P: | |
531 | pix_fmt = "YCbCr-4:2:0"; | |
532 | break; | |
533 | case AV_PIX_FMT_YUV422P: | |
534 | pix_fmt = "YCbCr-4:2:2"; | |
535 | break; | |
536 | case AV_PIX_FMT_YUV444P: | |
537 | pix_fmt = "YCbCr-4:4:4"; | |
538 | break; | |
539 | default: | |
540 | av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n"); | |
541 | return NULL; | |
542 | } | |
543 | ||
544 | if (c->extradata_size) | |
545 | config = xiph_extradata2config(c); | |
546 | else | |
547 | av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n"); | |
548 | if (!config) | |
549 | return NULL; | |
550 | ||
551 | av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n" | |
552 | "a=fmtp:%d delivery-method=inline; " | |
553 | "width=%d; height=%d; sampling=%s; " | |
554 | "configuration=%s\r\n", | |
555 | payload_type, payload_type, | |
556 | c->width, c->height, pix_fmt, config); | |
557 | break; | |
558 | } | |
559 | case AV_CODEC_ID_VP8: | |
560 | av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n", | |
561 | payload_type); | |
562 | break; | |
563 | case AV_CODEC_ID_MJPEG: | |
564 | if (payload_type >= RTP_PT_PRIVATE) | |
565 | av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n", | |
566 | payload_type); | |
567 | break; | |
568 | case AV_CODEC_ID_ADPCM_G722: | |
569 | if (payload_type >= RTP_PT_PRIVATE) | |
570 | av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n", | |
571 | payload_type, | |
572 | 8000, c->channels); | |
573 | break; | |
574 | case AV_CODEC_ID_ADPCM_G726: { | |
575 | if (payload_type >= RTP_PT_PRIVATE) | |
576 | av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n", | |
577 | payload_type, | |
578 | c->bits_per_coded_sample*8, | |
579 | c->sample_rate); | |
580 | break; | |
581 | } | |
582 | case AV_CODEC_ID_ILBC: | |
583 | av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n" | |
584 | "a=fmtp:%d mode=%d\r\n", | |
585 | payload_type, c->sample_rate, | |
586 | payload_type, c->block_align == 38 ? 20 : 30); | |
587 | break; | |
588 | case AV_CODEC_ID_SPEEX: | |
589 | av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n", | |
590 | payload_type, c->sample_rate); | |
591 | if (c->codec) { | |
592 | const char *mode; | |
593 | uint64_t vad_option; | |
594 | ||
595 | if (c->flags & CODEC_FLAG_QSCALE) | |
596 | mode = "on"; | |
597 | else if (!av_opt_get_int(c, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option) | |
598 | mode = "vad"; | |
599 | else | |
600 | mode = "off"; | |
601 | ||
602 | av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n", | |
603 | payload_type, mode); | |
604 | } | |
605 | break; | |
606 | case AV_CODEC_ID_OPUS: | |
607 | av_strlcatf(buff, size, "a=rtpmap:%d opus/48000\r\n", | |
608 | payload_type); | |
609 | break; | |
610 | default: | |
611 | /* Nothing special to do here... */ | |
612 | break; | |
613 | } | |
614 | ||
615 | av_free(config); | |
616 | ||
617 | return buff; | |
618 | } | |
619 | ||
620 | void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, | |
621 | const char *dest_addr, const char *dest_type, | |
622 | int port, int ttl, AVFormatContext *fmt) | |
623 | { | |
624 | AVCodecContext *c = st->codec; | |
625 | const char *type; | |
626 | int payload_type; | |
627 | ||
628 | payload_type = ff_rtp_get_payload_type(fmt, c, idx); | |
629 | ||
630 | switch (c->codec_type) { | |
631 | case AVMEDIA_TYPE_VIDEO : type = "video" ; break; | |
632 | case AVMEDIA_TYPE_AUDIO : type = "audio" ; break; | |
633 | case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break; | |
634 | default : type = "application"; break; | |
635 | } | |
636 | ||
637 | av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type); | |
638 | sdp_write_address(buff, size, dest_addr, dest_type, ttl); | |
639 | if (c->bit_rate) { | |
640 | av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000); | |
641 | } | |
642 | ||
643 | sdp_write_media_attributes(buff, size, c, payload_type, fmt); | |
644 | } | |
645 | ||
646 | int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size) | |
647 | { | |
648 | AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0); | |
649 | struct sdp_session_level s = { 0 }; | |
650 | int i, j, port, ttl, is_multicast, index = 0; | |
651 | char dst[32], dst_type[5]; | |
652 | ||
653 | memset(buf, 0, size); | |
654 | s.user = "-"; | |
655 | s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */ | |
656 | s.src_type = "IP4"; | |
657 | s.name = title ? title->value : "No Name"; | |
658 | ||
659 | port = 0; | |
660 | ttl = 0; | |
661 | if (n_files == 1) { | |
662 | port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename); | |
663 | is_multicast = resolve_destination(dst, sizeof(dst), dst_type, | |
664 | sizeof(dst_type)); | |
665 | if (!is_multicast) | |
666 | ttl = 0; | |
667 | if (dst[0]) { | |
668 | s.dst_addr = dst; | |
669 | s.dst_type = dst_type; | |
670 | s.ttl = ttl; | |
671 | if (!strcmp(dst_type, "IP6")) { | |
672 | s.src_addr = "::1"; | |
673 | s.src_type = "IP6"; | |
674 | } | |
675 | } | |
676 | } | |
677 | sdp_write_header(buf, size, &s); | |
678 | ||
679 | dst[0] = 0; | |
680 | for (i = 0; i < n_files; i++) { | |
681 | if (n_files != 1) { | |
682 | port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename); | |
683 | is_multicast = resolve_destination(dst, sizeof(dst), dst_type, | |
684 | sizeof(dst_type)); | |
685 | if (!is_multicast) | |
686 | ttl = 0; | |
687 | } | |
688 | for (j = 0; j < ac[i]->nb_streams; j++) { | |
689 | ff_sdp_write_media(buf, size, ac[i]->streams[j], index++, | |
690 | dst[0] ? dst : NULL, dst_type, | |
691 | (port > 0) ? port + j * 2 : 0, | |
692 | ttl, ac[i]); | |
693 | if (port <= 0) { | |
694 | av_strlcatf(buf, size, | |
695 | "a=control:streamid=%d\r\n", i + j); | |
696 | } | |
697 | if (ac[i]->pb && ac[i]->pb->av_class) { | |
698 | uint8_t *crypto_suite = NULL, *crypto_params = NULL; | |
699 | av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN, | |
700 | &crypto_suite); | |
701 | av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN, | |
702 | &crypto_params); | |
703 | if (crypto_suite && crypto_suite[0]) | |
704 | av_strlcatf(buf, size, | |
705 | "a=crypto:1 %s inline:%s\r\n", | |
706 | crypto_suite, crypto_params); | |
707 | av_free(crypto_suite); | |
708 | av_free(crypto_params); | |
709 | } | |
710 | } | |
711 | } | |
712 | ||
713 | return 0; | |
714 | } | |
715 | #else | |
716 | int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size) | |
717 | { | |
718 | return AVERROR(ENOSYS); | |
719 | } | |
720 | ||
721 | void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, | |
722 | const char *dest_addr, const char *dest_type, | |
723 | int port, int ttl, AVFormatContext *fmt) | |
724 | { | |
725 | } | |
726 | #endif |