2 * copyright (c) 2007 Luca Abeni
4 * This file is part of FFmpeg.
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.
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.
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
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"
38 #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
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) */
57 static void sdp_write_address(char *buff
, int size
, const char *dest_addr
,
58 const char *dest_type
, int ttl
)
63 if (ttl
> 0 && !strcmp(dest_type
, "IP4")) {
64 /* The TTL should only be specified for IPv4 multicast addresses,
66 av_strlcatf(buff
, size
, "c=IN %s %s/%d\r\n", dest_type
, dest_addr
, ttl
);
68 av_strlcatf(buff
, size
, "c=IN %s %s\r\n", dest_type
, dest_addr
);
73 static void sdp_write_header(char *buff
, int size
, struct sdp_session_level
*s
)
75 av_strlcatf(buff
, size
, "v=%d\r\n"
76 "o=- %d %d IN %s %s\r\n"
79 s
->id
, s
->version
, s
->src_type
, s
->src_addr
,
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
);
88 static int resolve_destination(char *dest_addr
, int size
, char *type
,
91 struct addrinfo hints
= { 0 }, *ai
;
94 av_strlcpy(type
, "IP4", type_size
);
98 /* Resolve the destination, since it must be written
99 * as a numeric IP address in the SDP. */
101 if (getaddrinfo(dest_addr
, NULL
, &hints
, &ai
))
103 getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, dest_addr
, size
,
104 NULL
, 0, NI_NUMERICHOST
);
106 if (ai
->ai_family
== AF_INET6
)
107 av_strlcpy(type
, "IP6", type_size
);
109 is_multicast
= ff_is_multicast_address(ai
->ai_addr
);
114 static int resolve_destination(char *dest_addr
, int size
, char *type
,
121 static int sdp_get_address(char *dest_addr
, int size
, int *ttl
, const char *url
)
127 av_url_split(proto
, sizeof(proto
), NULL
, 0, dest_addr
, size
, &port
, NULL
, 0, url
);
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.
138 p
= strchr(url
, '?');
142 if (av_find_info_tag(buff
, sizeof(buff
), "ttl", p
)) {
143 *ttl
= strtol(buff
, NULL
, 10);
152 #define MAX_PSET_SIZE 1024
153 static char *extradata2psets(AVCodecContext
*c
)
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
;
163 if (c
->extradata_size
> MAX_EXTRADATA_SIZE
) {
164 av_log(c
, AV_LOG_ERROR
, "Too much extradata!\n");
168 if (c
->extradata
[0] == 1) {
171 AVBitStreamFilterContext
*bsfc
= av_bitstream_filter_init("h264_mp4toannexb");
174 av_log(c
, AV_LOG_ERROR
, "Cannot open the h264_mp4toannexb BSF!\n");
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
);
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
);
191 psets
= av_mallocz(MAX_PSET_SIZE
);
193 av_log(c
, AV_LOG_ERROR
, "Cannot allocate memory for the parameter sets.\n");
194 av_free(orig_extradata
);
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
) {
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 */
211 if (p
!= (psets
+ strlen(pset_string
))) {
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
);
228 if (sps
&& sps_end
- sps
>= 4) {
229 memcpy(p
, profile_string
, strlen(profile_string
));
231 ff_data_to_hex(p
, sps
+ 1, 3, 0);
234 if (orig_extradata
) {
235 av_free(c
->extradata
);
236 c
->extradata
= orig_extradata
;
237 c
->extradata_size
= orig_extradata_size
;
243 static char *extradata2config(AVCodecContext
*c
)
247 if (c
->extradata_size
> MAX_EXTRADATA_SIZE
) {
248 av_log(c
, AV_LOG_ERROR
, "Too much extradata!\n");
252 config
= av_malloc(10 + c
->extradata_size
* 2);
254 av_log(c
, AV_LOG_ERROR
, "Cannot allocate memory for the config info.\n");
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;
264 static char *xiph_extradata2config(AVCodecContext
*c
)
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
;
271 switch (c
->codec_id
) {
272 case AV_CODEC_ID_THEORA
:
273 first_header_size
= 42;
275 case AV_CODEC_ID_VORBIS
:
276 first_header_size
= 30;
279 av_log(c
, AV_LOG_ERROR
, "Unsupported Xiph codec ID\n");
283 if (avpriv_split_xiph_headers(c
->extradata
, c
->extradata_size
,
284 first_header_size
, header_start
,
286 av_log(c
, AV_LOG_ERROR
, "Extradata corrupt.\n");
290 headers_len
= header_len
[0] + header_len
[2];
291 config_len
= 4 + // count
296 headers_len
; // and the rest
298 config
= av_malloc(config_len
);
302 encoded_config
= av_malloc(AV_BASE64_SIZE(config_len
));
303 if (!encoded_config
) {
308 config
[0] = config
[1] = config
[2] = 0;
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;
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]);
321 av_base64_encode(encoded_config
, AV_BASE64_SIZE(config_len
),
325 return encoded_config
;
328 av_log(c
, AV_LOG_ERROR
,
329 "Not enough memory for configuration string\n");
333 static int latm_context2profilelevel(AVCodecContext
*c
)
336 * The RTP payload format specification is described in RFC 3016
337 * The encoding specifications are provided in ISO/IEC 14496-3 */
339 int profile_level
= 0x2B;
341 /* TODO: AAC Profile only supports AAC LC Object Type.
342 * Different Object Types should implement different Profile Levels */
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
353 } else if (c
->sample_rate
<= 96000) {
354 if (c
->channels
<= 5) {
355 profile_level
= 0x2B; // AAC Profile, Level 5
359 return profile_level
;
362 static char *latm_context2config(AVCodecContext
*c
)
365 * The RTP payload format specification is described in RFC 3016
366 * The encoding specifications are provided in ISO/IEC 14496-3 */
368 uint8_t config_byte
[6];
372 for (rate_index
= 0; rate_index
< 16; rate_index
++)
373 if (avpriv_mpeg4audio_sample_rates
[rate_index
] == c
->sample_rate
)
375 if (rate_index
== 16) {
376 av_log(c
, AV_LOG_ERROR
, "Unsupported sample rate\n");
380 config_byte
[0] = 0x40;
382 config_byte
[2] = 0x20 | rate_index
;
383 config_byte
[3] = c
->channels
<< 4;
384 config_byte
[4] = 0x3f;
385 config_byte
[5] = 0xc0;
387 config
= av_malloc(6*2+1);
389 av_log(c
, AV_LOG_ERROR
, "Cannot allocate memory for the config info.\n");
392 ff_data_to_hex(config
, config_byte
, 6, 1);
398 static char *sdp_write_media_attributes(char *buff
, int size
, AVCodecContext
*c
, int payload_type
, AVFormatContext
*fmt
)
402 switch (c
->codec_id
) {
403 case AV_CODEC_ID_H264
: {
405 if (fmt
&& fmt
->oformat
&& fmt
->oformat
->priv_class
&&
406 av_opt_flag_is_set(fmt
->priv_data
, "rtpflags", "h264_mode0"))
408 if (c
->extradata_size
) {
409 config
= extradata2psets(c
);
411 av_strlcatf(buff
, size
, "a=rtpmap:%d H264/90000\r\n"
412 "a=fmtp:%d packetization-mode=%d%s\r\n",
414 payload_type
, mode
, config
? config
: "");
417 case AV_CODEC_ID_H261
:
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)
423 if (c
->width
== 352 && c
->height
== 288)
425 av_strlcatf(buff
, size
, "a=rtpmap:%d H261/90000\r\n", payload_type
);
427 av_strlcatf(buff
, size
, "a=fmtp:%d %s\r\n", payload_type
, pic_fmt
);
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",
442 payload_type
, c
->width
, c
->height
);
444 case AV_CODEC_ID_MPEG4
:
445 if (c
->extradata_size
) {
446 config
= extradata2config(c
);
448 av_strlcatf(buff
, size
, "a=rtpmap:%d MP4V-ES/90000\r\n"
449 "a=fmtp:%d profile-level-id=1%s\r\n",
451 payload_type
, config
? config
: "");
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
);
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
);
464 if (c
->extradata_size
) {
465 config
= extradata2config(c
);
467 /* FIXME: maybe we can forge config information based on the
468 * codec parameters...
470 av_log(c
, AV_LOG_ERROR
, "AAC with no global headers is currently not supported.\n");
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
);
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",
488 c
->sample_rate
, c
->channels
);
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",
494 c
->sample_rate
, c
->channels
);
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",
500 c
->sample_rate
, c
->channels
);
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
,
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
,
514 case AV_CODEC_ID_VORBIS
:
515 if (c
->extradata_size
)
516 config
= xiph_extradata2config(c
);
518 av_log(c
, AV_LOG_ERROR
, "Vorbis configuration info missing\n");
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
);
527 case AV_CODEC_ID_THEORA
: {
529 switch (c
->pix_fmt
) {
530 case AV_PIX_FMT_YUV420P
:
531 pix_fmt
= "YCbCr-4:2:0";
533 case AV_PIX_FMT_YUV422P
:
534 pix_fmt
= "YCbCr-4:2:2";
536 case AV_PIX_FMT_YUV444P
:
537 pix_fmt
= "YCbCr-4:4:4";
540 av_log(c
, AV_LOG_ERROR
, "Unsupported pixel format.\n");
544 if (c
->extradata_size
)
545 config
= xiph_extradata2config(c
);
547 av_log(c
, AV_LOG_ERROR
, "Theora configuation info missing\n");
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
);
559 case AV_CODEC_ID_VP8
:
560 av_strlcatf(buff
, size
, "a=rtpmap:%d VP8/90000\r\n",
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",
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",
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",
578 c
->bits_per_coded_sample
*8,
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);
588 case AV_CODEC_ID_SPEEX
:
589 av_strlcatf(buff
, size
, "a=rtpmap:%d speex/%d\r\n",
590 payload_type
, c
->sample_rate
);
595 if (c
->flags
& CODEC_FLAG_QSCALE
)
597 else if (!av_opt_get_int(c
, "vad", AV_OPT_FLAG_ENCODING_PARAM
, &vad_option
) && vad_option
)
602 av_strlcatf(buff
, size
, "a=fmtp:%d vbr=%s\r\n",
606 case AV_CODEC_ID_OPUS
:
607 av_strlcatf(buff
, size
, "a=rtpmap:%d opus/48000\r\n",
611 /* Nothing special to do here... */
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
)
624 AVCodecContext
*c
= st
->codec
;
628 payload_type
= ff_rtp_get_payload_type(fmt
, c
, idx
);
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;
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
);
640 av_strlcatf(buff
, size
, "b=AS:%d\r\n", c
->bit_rate
/ 1000);
643 sdp_write_media_attributes(buff
, size
, c
, payload_type
, fmt
);
646 int av_sdp_create(AVFormatContext
*ac
[], int n_files
, char *buf
, int size
)
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];
653 memset(buf
, 0, size
);
655 s
.src_addr
= "127.0.0.1"; /* FIXME: Properly set this */
657 s
.name
= title
? title
->value
: "No Name";
662 port
= sdp_get_address(dst
, sizeof(dst
), &ttl
, ac
[0]->filename
);
663 is_multicast
= resolve_destination(dst
, sizeof(dst
), dst_type
,
669 s
.dst_type
= dst_type
;
671 if (!strcmp(dst_type
, "IP6")) {
677 sdp_write_header(buf
, size
, &s
);
680 for (i
= 0; i
< n_files
; i
++) {
682 port
= sdp_get_address(dst
, sizeof(dst
), &ttl
, ac
[i
]->filename
);
683 is_multicast
= resolve_destination(dst
, sizeof(dst
), dst_type
,
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,
694 av_strlcatf(buf
, size
,
695 "a=control:streamid=%d\r\n", i
+ j
);
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
,
701 av_opt_get(ac
[i
]->pb
, "srtp_out_params", AV_OPT_SEARCH_CHILDREN
,
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
);
716 int av_sdp_create(AVFormatContext
*ac
[], int n_files
, char *buf
, int size
)
718 return AVERROR(ENOSYS
);
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
)