LCOV - code coverage report
Current view: top level - libavformat - sdp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 38 455 8.4 %
Date: 2017-12-18 06:23:41 Functions: 4 13 30.8 %

          Line data    Source code
       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 "hevc.h"
      33             : #include "rtp.h"
      34             : #if CONFIG_NETWORK
      35             : #include "network.h"
      36             : #endif
      37             : 
      38             : #if CONFIG_RTP_MUXER
      39             : #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
      40             : 
      41             : struct sdp_session_level {
      42             :     int sdp_version;      /**< protocol version (currently 0) */
      43             :     int id;               /**< session ID */
      44             :     int version;          /**< session version */
      45             :     int start_time;       /**< session start time (NTP time, in seconds),
      46             :                                or 0 in case of permanent session */
      47             :     int end_time;         /**< session end time (NTP time, in seconds),
      48             :                                or 0 if the session is not bounded */
      49             :     int ttl;              /**< TTL, in case of multicast stream */
      50             :     const char *user;     /**< username of the session's creator */
      51             :     const char *src_addr; /**< IP address of the machine from which the session was created */
      52             :     const char *src_type; /**< address type of src_addr */
      53             :     const char *dst_addr; /**< destination IP address (can be multicast) */
      54             :     const char *dst_type; /**< destination IP address type */
      55             :     const char *name;     /**< session name (can be an empty string) */
      56             : };
      57             : 
      58           2 : static void sdp_write_address(char *buff, int size, const char *dest_addr,
      59             :                               const char *dest_type, int ttl)
      60             : {
      61           2 :     if (dest_addr) {
      62           0 :         if (!dest_type)
      63           0 :             dest_type = "IP4";
      64           0 :         if (ttl > 0 && !strcmp(dest_type, "IP4")) {
      65             :             /* The TTL should only be specified for IPv4 multicast addresses,
      66             :              * not for IPv6. */
      67           0 :             av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
      68             :         } else {
      69           0 :             av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
      70             :         }
      71             :     }
      72           2 : }
      73             : 
      74           0 : static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
      75             : {
      76           0 :     av_strlcatf(buff, size, "v=%d\r\n"
      77             :                             "o=- %d %d IN %s %s\r\n"
      78             :                             "s=%s\r\n",
      79             :                             s->sdp_version,
      80             :                             s->id, s->version, s->src_type, s->src_addr,
      81             :                             s->name);
      82           0 :     sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
      83           0 :     av_strlcatf(buff, size, "t=%d %d\r\n"
      84             :                             "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
      85             :                             s->start_time, s->end_time);
      86           0 : }
      87             : 
      88             : #if CONFIG_NETWORK
      89           0 : static int resolve_destination(char *dest_addr, int size, char *type,
      90             :                                int type_size)
      91             : {
      92           0 :     struct addrinfo hints = { 0 }, *ai;
      93             :     int is_multicast;
      94             : 
      95           0 :     av_strlcpy(type, "IP4", type_size);
      96           0 :     if (!dest_addr[0])
      97           0 :         return 0;
      98             : 
      99             :     /* Resolve the destination, since it must be written
     100             :      * as a numeric IP address in the SDP. */
     101             : 
     102           0 :     if (getaddrinfo(dest_addr, NULL, &hints, &ai))
     103           0 :         return 0;
     104           0 :     getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
     105             :                 NULL, 0, NI_NUMERICHOST);
     106             : #ifdef AF_INET6
     107           0 :     if (ai->ai_family == AF_INET6)
     108           0 :         av_strlcpy(type, "IP6", type_size);
     109             : #endif
     110           0 :     is_multicast = ff_is_multicast_address(ai->ai_addr);
     111           0 :     freeaddrinfo(ai);
     112           0 :     return is_multicast;
     113             : }
     114             : #else
     115             : static int resolve_destination(char *dest_addr, int size, char *type,
     116             :                                int type_size)
     117             : {
     118             :     return 0;
     119             : }
     120             : #endif
     121             : 
     122           0 : static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
     123             : {
     124             :     int port;
     125             :     const char *p;
     126             :     char proto[32];
     127             : 
     128           0 :     av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
     129             : 
     130           0 :     *ttl = 0;
     131             : 
     132           0 :     if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
     133             :         /* The url isn't for the actual rtp sessions,
     134             :          * don't parse out anything else than the destination.
     135             :          */
     136           0 :         return 0;
     137             :     }
     138             : 
     139           0 :     p = strchr(url, '?');
     140           0 :     if (p) {
     141             :         char buff[64];
     142             : 
     143           0 :         if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
     144           0 :             *ttl = strtol(buff, NULL, 10);
     145             :         } else {
     146           0 :             *ttl = 5;
     147             :         }
     148             :     }
     149             : 
     150           0 :     return port;
     151             : }
     152             : 
     153             : #define MAX_PSET_SIZE 1024
     154           0 : static char *extradata2psets(AVFormatContext *s, AVCodecParameters *par)
     155             : {
     156             :     char *psets, *p;
     157             :     const uint8_t *r;
     158             :     static const char pset_string[] = "; sprop-parameter-sets=";
     159             :     static const char profile_string[] = "; profile-level-id=";
     160           0 :     uint8_t *extradata = par->extradata;
     161           0 :     int extradata_size = par->extradata_size;
     162           0 :     uint8_t *tmpbuf = NULL;
     163           0 :     const uint8_t *sps = NULL, *sps_end;
     164             : 
     165           0 :     if (par->extradata_size > MAX_EXTRADATA_SIZE) {
     166           0 :         av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
     167             : 
     168           0 :         return NULL;
     169             :     }
     170           0 :     if (par->extradata[0] == 1) {
     171           0 :         if (ff_avc_write_annexb_extradata(par->extradata, &extradata,
     172             :                                           &extradata_size))
     173           0 :             return NULL;
     174           0 :         tmpbuf = extradata;
     175             :     }
     176             : 
     177           0 :     psets = av_mallocz(MAX_PSET_SIZE);
     178           0 :     if (!psets) {
     179           0 :         av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
     180           0 :         av_free(tmpbuf);
     181           0 :         return NULL;
     182             :     }
     183           0 :     memcpy(psets, pset_string, strlen(pset_string));
     184           0 :     p = psets + strlen(pset_string);
     185           0 :     r = ff_avc_find_startcode(extradata, extradata + extradata_size);
     186           0 :     while (r < extradata + extradata_size) {
     187             :         const uint8_t *r1;
     188             :         uint8_t nal_type;
     189             : 
     190           0 :         while (!*(r++));
     191           0 :         nal_type = *r & 0x1f;
     192           0 :         r1 = ff_avc_find_startcode(r, extradata + extradata_size);
     193           0 :         if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
     194           0 :             r = r1;
     195           0 :             continue;
     196             :         }
     197           0 :         if (p != (psets + strlen(pset_string))) {
     198           0 :             *p = ',';
     199           0 :             p++;
     200             :         }
     201           0 :         if (!sps) {
     202           0 :             sps = r;
     203           0 :             sps_end = r1;
     204             :         }
     205           0 :         if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) {
     206           0 :             av_log(s, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
     207           0 :             av_free(psets);
     208           0 :             av_free(tmpbuf);
     209             : 
     210           0 :             return NULL;
     211             :         }
     212           0 :         p += strlen(p);
     213           0 :         r = r1;
     214             :     }
     215           0 :     if (sps && sps_end - sps >= 4) {
     216           0 :         memcpy(p, profile_string, strlen(profile_string));
     217           0 :         p += strlen(p);
     218           0 :         ff_data_to_hex(p, sps + 1, 3, 0);
     219           0 :         p[6] = '\0';
     220             :     }
     221           0 :     av_free(tmpbuf);
     222             : 
     223           0 :     return psets;
     224             : }
     225             : 
     226           0 : static char *extradata2psets_hevc(AVCodecParameters *par)
     227             : {
     228             :     char *psets;
     229           0 :     uint8_t *extradata = par->extradata;
     230           0 :     int extradata_size = par->extradata_size;
     231           0 :     uint8_t *tmpbuf = NULL;
     232           0 :     int ps_pos[3] = { 0 };
     233             :     static const char * const ps_names[3] = { "vps", "sps", "pps" };
     234             :     int num_arrays, num_nalus;
     235             :     int pos, i, j;
     236             : 
     237             :     // Convert to hvcc format. Since we need to group multiple NALUs of
     238             :     // the same type, and we might need to convert from one format to the
     239             :     // other anyway, we get away with a little less work by using the hvcc
     240             :     // format.
     241           0 :     if (par->extradata[0] != 1) {
     242             :         AVIOContext *pb;
     243           0 :         if (avio_open_dyn_buf(&pb) < 0)
     244           0 :             return NULL;
     245           0 :         if (ff_isom_write_hvcc(pb, par->extradata, par->extradata_size, 0) < 0) {
     246           0 :             avio_close_dyn_buf(pb, &tmpbuf);
     247           0 :             goto err;
     248             :         }
     249           0 :         extradata_size = avio_close_dyn_buf(pb, &extradata);
     250           0 :         tmpbuf = extradata;
     251             :     }
     252             : 
     253           0 :     if (extradata_size < 23)
     254           0 :         goto err;
     255             : 
     256           0 :     num_arrays = extradata[22];
     257           0 :     pos = 23;
     258           0 :     for (i = 0; i < num_arrays; i++) {
     259             :         int num_nalus, nalu_type;
     260           0 :         if (pos + 3 > extradata_size)
     261           0 :             goto err;
     262           0 :         nalu_type = extradata[pos] & 0x3f;
     263             :         // Not including libavcodec/hevc.h to avoid confusion between
     264             :         // NAL_* with the same name for both H.264 and HEVC.
     265           0 :         if (nalu_type == 32) // VPS
     266           0 :             ps_pos[0] = pos;
     267           0 :         else if (nalu_type == 33) // SPS
     268           0 :             ps_pos[1] = pos;
     269           0 :         else if (nalu_type == 34) // PPS
     270           0 :             ps_pos[2] = pos;
     271           0 :         num_nalus = AV_RB16(&extradata[pos + 1]);
     272           0 :         pos += 3;
     273           0 :         for (j = 0; j < num_nalus; j++) {
     274             :             int len;
     275           0 :             if (pos + 2 > extradata_size)
     276           0 :                 goto err;
     277           0 :             len = AV_RB16(&extradata[pos]);
     278           0 :             pos += 2;
     279           0 :             if (pos + len > extradata_size)
     280           0 :                 goto err;
     281           0 :             pos += len;
     282             :         }
     283             :     }
     284           0 :     if (!ps_pos[0] || !ps_pos[1] || !ps_pos[2])
     285             :         goto err;
     286             : 
     287           0 :     psets = av_mallocz(MAX_PSET_SIZE);
     288           0 :     if (!psets)
     289           0 :         goto err;
     290           0 :     psets[0] = '\0';
     291             : 
     292           0 :     for (i = 0; i < 3; i++) {
     293           0 :         pos = ps_pos[i];
     294             : 
     295           0 :         if (i > 0)
     296           0 :             av_strlcat(psets, "; ", MAX_PSET_SIZE);
     297           0 :         av_strlcatf(psets, MAX_PSET_SIZE, "sprop-%s=", ps_names[i]);
     298             : 
     299             :         // Skipping boundary checks in the input here; we've already traversed
     300             :         // the whole hvcc structure above without issues
     301           0 :         num_nalus = AV_RB16(&extradata[pos + 1]);
     302           0 :         pos += 3;
     303           0 :         for (j = 0; j < num_nalus; j++) {
     304           0 :             int len = AV_RB16(&extradata[pos]);
     305             :             int strpos;
     306           0 :             pos += 2;
     307           0 :             if (j > 0)
     308           0 :                 av_strlcat(psets, ",", MAX_PSET_SIZE);
     309           0 :             strpos = strlen(psets);
     310           0 :             if (!av_base64_encode(psets + strpos, MAX_PSET_SIZE - strpos,
     311           0 :                                   &extradata[pos], len)) {
     312           0 :                 av_free(psets);
     313           0 :                 goto err;
     314             :             }
     315           0 :             pos += len;
     316             :         }
     317             :     }
     318           0 :     av_free(tmpbuf);
     319             : 
     320           0 :     return psets;
     321             : 
     322           0 : err:
     323           0 :     av_free(tmpbuf);
     324           0 :     return NULL;
     325             : }
     326             : 
     327           1 : static char *extradata2config(AVFormatContext *s, AVCodecParameters *par)
     328             : {
     329             :     char *config;
     330             : 
     331           1 :     if (par->extradata_size > MAX_EXTRADATA_SIZE) {
     332           0 :         av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
     333             : 
     334           0 :         return NULL;
     335             :     }
     336           1 :     config = av_malloc(10 + par->extradata_size * 2);
     337           1 :     if (!config) {
     338           0 :         av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
     339           0 :         return NULL;
     340             :     }
     341           1 :     memcpy(config, "; config=", 9);
     342           1 :     ff_data_to_hex(config + 9, par->extradata, par->extradata_size, 0);
     343           1 :     config[9 + par->extradata_size * 2] = 0;
     344             : 
     345           1 :     return config;
     346             : }
     347             : 
     348           0 : static char *xiph_extradata2config(AVFormatContext *s, AVCodecParameters *par)
     349             : {
     350             :     char *config, *encoded_config;
     351             :     const uint8_t *header_start[3];
     352             :     int headers_len, header_len[3], config_len;
     353             :     int first_header_size;
     354             : 
     355           0 :     switch (par->codec_id) {
     356           0 :     case AV_CODEC_ID_THEORA:
     357           0 :         first_header_size = 42;
     358           0 :         break;
     359           0 :     case AV_CODEC_ID_VORBIS:
     360           0 :         first_header_size = 30;
     361           0 :         break;
     362           0 :     default:
     363           0 :         av_log(s, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
     364           0 :         return NULL;
     365             :     }
     366             : 
     367           0 :     if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
     368             :                               first_header_size, header_start,
     369             :                               header_len) < 0) {
     370           0 :         av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
     371           0 :         return NULL;
     372             :     }
     373             : 
     374           0 :     headers_len = header_len[0] + header_len[2];
     375           0 :     config_len = 4 +          // count
     376             :                  3 +          // ident
     377             :                  2 +          // packet size
     378             :                  1 +          // header count
     379             :                  2 +          // header size
     380             :                  headers_len; // and the rest
     381             : 
     382           0 :     config = av_malloc(config_len);
     383           0 :     if (!config)
     384           0 :         goto xiph_fail;
     385             : 
     386           0 :     encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
     387           0 :     if (!encoded_config) {
     388           0 :         av_free(config);
     389           0 :         goto xiph_fail;
     390             :     }
     391             : 
     392           0 :     config[0] = config[1] = config[2] = 0;
     393           0 :     config[3] = 1;
     394           0 :     config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
     395           0 :     config[5] = (RTP_XIPH_IDENT >>  8) & 0xff;
     396           0 :     config[6] = (RTP_XIPH_IDENT      ) & 0xff;
     397           0 :     config[7] = (headers_len >> 8) & 0xff;
     398           0 :     config[8] = headers_len & 0xff;
     399           0 :     config[9] = 2;
     400           0 :     config[10] = header_len[0];
     401           0 :     config[11] = 0; // size of comment header; nonexistent
     402           0 :     memcpy(config + 12, header_start[0], header_len[0]);
     403           0 :     memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
     404             : 
     405           0 :     av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
     406             :                      config, config_len);
     407           0 :     av_free(config);
     408             : 
     409           0 :     return encoded_config;
     410             : 
     411           0 : xiph_fail:
     412           0 :     av_log(s, AV_LOG_ERROR,
     413             :            "Not enough memory for configuration string\n");
     414           0 :     return NULL;
     415             : }
     416             : 
     417           0 : static int latm_context2profilelevel(AVCodecParameters *par)
     418             : {
     419             :     /* MP4A-LATM
     420             :      * The RTP payload format specification is described in RFC 3016
     421             :      * The encoding specifications are provided in ISO/IEC 14496-3 */
     422             : 
     423           0 :     int profile_level = 0x2B;
     424             : 
     425             :     /* TODO: AAC Profile only supports AAC LC Object Type.
     426             :      * Different Object Types should implement different Profile Levels */
     427             : 
     428           0 :     if (par->sample_rate <= 24000) {
     429           0 :         if (par->channels <= 2)
     430           0 :             profile_level = 0x28; // AAC Profile, Level 1
     431           0 :     } else if (par->sample_rate <= 48000) {
     432           0 :         if (par->channels <= 2) {
     433           0 :             profile_level = 0x29; // AAC Profile, Level 2
     434           0 :         } else if (par->channels <= 5) {
     435           0 :             profile_level = 0x2A; // AAC Profile, Level 4
     436             :         }
     437           0 :     } else if (par->sample_rate <= 96000) {
     438           0 :         if (par->channels <= 5) {
     439           0 :             profile_level = 0x2B; // AAC Profile, Level 5
     440             :         }
     441             :     }
     442             : 
     443           0 :     return profile_level;
     444             : }
     445             : 
     446           0 : static char *latm_context2config(AVFormatContext *s, AVCodecParameters *par)
     447             : {
     448             :     /* MP4A-LATM
     449             :      * The RTP payload format specification is described in RFC 3016
     450             :      * The encoding specifications are provided in ISO/IEC 14496-3 */
     451             : 
     452             :     uint8_t config_byte[6];
     453             :     int rate_index;
     454             :     char *config;
     455             : 
     456           0 :     for (rate_index = 0; rate_index < 16; rate_index++)
     457           0 :         if (avpriv_mpeg4audio_sample_rates[rate_index] == par->sample_rate)
     458           0 :             break;
     459           0 :     if (rate_index == 16) {
     460           0 :         av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
     461           0 :         return NULL;
     462             :     }
     463             : 
     464           0 :     config_byte[0] = 0x40;
     465           0 :     config_byte[1] = 0;
     466           0 :     config_byte[2] = 0x20 | rate_index;
     467           0 :     config_byte[3] = par->channels << 4;
     468           0 :     config_byte[4] = 0x3f;
     469           0 :     config_byte[5] = 0xc0;
     470             : 
     471           0 :     config = av_malloc(6*2+1);
     472           0 :     if (!config) {
     473           0 :         av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
     474           0 :         return NULL;
     475             :     }
     476           0 :     ff_data_to_hex(config, config_byte, 6, 1);
     477           0 :     config[12] = 0;
     478             : 
     479           0 :     return config;
     480             : }
     481             : 
     482           2 : static char *sdp_write_media_attributes(char *buff, int size, AVStream *st, int payload_type, AVFormatContext *fmt)
     483             : {
     484           2 :     char *config = NULL;
     485           2 :     AVCodecParameters *p = st->codecpar;
     486             : 
     487           2 :     switch (p->codec_id) {
     488           0 :         case AV_CODEC_ID_DIRAC:
     489           0 :             av_strlcatf(buff, size, "a=rtpmap:%d VC2/90000\r\n", payload_type);
     490           0 :             break;
     491           0 :         case AV_CODEC_ID_H264: {
     492           0 :             int mode = 1;
     493           0 :             if (fmt && fmt->oformat && fmt->oformat->priv_class &&
     494           0 :                 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
     495           0 :                 mode = 0;
     496           0 :             if (p->extradata_size) {
     497           0 :                 config = extradata2psets(fmt, p);
     498             :             }
     499           0 :             av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
     500             :                                     "a=fmtp:%d packetization-mode=%d%s\r\n",
     501             :                                      payload_type,
     502             :                                      payload_type, mode, config ? config : "");
     503           0 :             break;
     504             :         }
     505           0 :         case AV_CODEC_ID_H261:
     506             :         {
     507           0 :             const char *pic_fmt = NULL;
     508             :             /* only QCIF and CIF are specified as supported in RFC 4587 */
     509           0 :             if (p->width == 176 && p->height == 144)
     510           0 :                 pic_fmt = "QCIF=1";
     511           0 :             else if (p->width == 352 && p->height == 288)
     512           0 :                 pic_fmt = "CIF=1";
     513           0 :             if (payload_type >= RTP_PT_PRIVATE)
     514           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
     515           0 :             if (pic_fmt)
     516           0 :                 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
     517           0 :             break;
     518             :         }
     519           0 :         case AV_CODEC_ID_H263:
     520             :         case AV_CODEC_ID_H263P:
     521             :             /* a=framesize is required by 3GPP TS 26.234 (PSS). It
     522             :              * actually specifies the maximum video size, but we only know
     523             :              * the current size. This is required for playback on Android
     524             :              * stagefright and on Samsung bada. */
     525           0 :             if (!fmt || !fmt->oformat->priv_class ||
     526           0 :                 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
     527           0 :                 p->codec_id == AV_CODEC_ID_H263P)
     528           0 :             av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
     529             :                                     "a=framesize:%d %d-%d\r\n",
     530             :                                     payload_type,
     531             :                                     payload_type, p->width, p->height);
     532           0 :             break;
     533           0 :         case AV_CODEC_ID_HEVC:
     534           0 :             if (p->extradata_size)
     535           0 :                 config = extradata2psets_hevc(p);
     536           0 :             av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
     537           0 :             if (config)
     538           0 :                 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n",
     539             :                                          payload_type, config);
     540           0 :             break;
     541           1 :         case AV_CODEC_ID_MPEG4:
     542           1 :             if (p->extradata_size) {
     543           1 :                 config = extradata2config(fmt, p);
     544             :             }
     545           1 :             av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
     546             :                                     "a=fmtp:%d profile-level-id=1%s\r\n",
     547             :                                      payload_type,
     548             :                                      payload_type, config ? config : "");
     549           1 :             break;
     550           0 :         case AV_CODEC_ID_AAC:
     551           0 :             if (fmt && fmt->oformat && fmt->oformat->priv_class &&
     552           0 :                 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
     553           0 :                 config = latm_context2config(fmt, p);
     554           0 :                 if (!config)
     555           0 :                     return NULL;
     556           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
     557             :                                         "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
     558             :                                          payload_type, p->sample_rate, p->channels,
     559             :                                          payload_type, latm_context2profilelevel(p), config);
     560             :             } else {
     561           0 :                 if (p->extradata_size) {
     562           0 :                     config = extradata2config(fmt, p);
     563             :                 } else {
     564             :                     /* FIXME: maybe we can forge config information based on the
     565             :                      *        codec parameters...
     566             :                      */
     567           0 :                     av_log(fmt, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
     568           0 :                     return NULL;
     569             :                 }
     570           0 :                 if (!config) {
     571           0 :                     return NULL;
     572             :                 }
     573           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
     574             :                                         "a=fmtp:%d profile-level-id=1;"
     575             :                                         "mode=AAC-hbr;sizelength=13;indexlength=3;"
     576             :                                         "indexdeltalength=3%s\r\n",
     577             :                                          payload_type, p->sample_rate, p->channels,
     578             :                                          payload_type, config);
     579             :             }
     580           0 :             break;
     581           0 :         case AV_CODEC_ID_PCM_S16BE:
     582           0 :             if (payload_type >= RTP_PT_PRIVATE)
     583           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
     584             :                                          payload_type,
     585             :                                          p->sample_rate, p->channels);
     586           0 :             break;
     587           0 :         case AV_CODEC_ID_PCM_S24BE:
     588           0 :             if (payload_type >= RTP_PT_PRIVATE)
     589           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d L24/%d/%d\r\n",
     590             :                                          payload_type,
     591             :                                          p->sample_rate, p->channels);
     592           0 :             break;
     593           0 :         case AV_CODEC_ID_PCM_MULAW:
     594           0 :             if (payload_type >= RTP_PT_PRIVATE)
     595           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
     596             :                                          payload_type,
     597             :                                          p->sample_rate, p->channels);
     598           0 :             break;
     599           1 :         case AV_CODEC_ID_PCM_ALAW:
     600           1 :             if (payload_type >= RTP_PT_PRIVATE)
     601           1 :                 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
     602             :                                          payload_type,
     603             :                                          p->sample_rate, p->channels);
     604           1 :             break;
     605           0 :         case AV_CODEC_ID_AMR_NB:
     606           0 :             av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
     607             :                                     "a=fmtp:%d octet-align=1\r\n",
     608             :                                      payload_type, p->sample_rate, p->channels,
     609             :                                      payload_type);
     610           0 :             break;
     611           0 :         case AV_CODEC_ID_AMR_WB:
     612           0 :             av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
     613             :                                     "a=fmtp:%d octet-align=1\r\n",
     614             :                                      payload_type, p->sample_rate, p->channels,
     615             :                                      payload_type);
     616           0 :             break;
     617           0 :         case AV_CODEC_ID_VORBIS:
     618           0 :             if (p->extradata_size)
     619           0 :                 config = xiph_extradata2config(fmt, p);
     620             :             else
     621           0 :                 av_log(fmt, AV_LOG_ERROR, "Vorbis configuration info missing\n");
     622           0 :             if (!config)
     623           0 :                 return NULL;
     624             : 
     625           0 :             av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
     626             :                                     "a=fmtp:%d configuration=%s\r\n",
     627             :                                     payload_type, p->sample_rate, p->channels,
     628             :                                     payload_type, config);
     629           0 :             break;
     630           0 :         case AV_CODEC_ID_THEORA: {
     631             :             const char *pix_fmt;
     632           0 :             switch (p->format) {
     633           0 :             case AV_PIX_FMT_YUV420P:
     634           0 :                 pix_fmt = "YCbCr-4:2:0";
     635           0 :                 break;
     636           0 :             case AV_PIX_FMT_YUV422P:
     637           0 :                 pix_fmt = "YCbCr-4:2:2";
     638           0 :                 break;
     639           0 :             case AV_PIX_FMT_YUV444P:
     640           0 :                 pix_fmt = "YCbCr-4:4:4";
     641           0 :                 break;
     642           0 :             default:
     643           0 :                 av_log(fmt, AV_LOG_ERROR, "Unsupported pixel format.\n");
     644           0 :                 return NULL;
     645             :             }
     646             : 
     647           0 :             if (p->extradata_size)
     648           0 :                 config = xiph_extradata2config(fmt, p);
     649             :             else
     650           0 :                 av_log(fmt, AV_LOG_ERROR, "Theora configuration info missing\n");
     651           0 :             if (!config)
     652           0 :                 return NULL;
     653             : 
     654           0 :             av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
     655             :                                     "a=fmtp:%d delivery-method=inline; "
     656             :                                     "width=%d; height=%d; sampling=%s; "
     657             :                                     "configuration=%s\r\n",
     658             :                                     payload_type, payload_type,
     659             :                                     p->width, p->height, pix_fmt, config);
     660           0 :             break;
     661             :         }
     662           0 :         case AV_CODEC_ID_VP8:
     663           0 :             av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
     664             :                                      payload_type);
     665           0 :             break;
     666           0 :         case AV_CODEC_ID_VP9:
     667           0 :             av_strlcatf(buff, size, "a=rtpmap:%d VP9/90000\r\n",
     668             :                                      payload_type);
     669           0 :             break;
     670           0 :         case AV_CODEC_ID_MJPEG:
     671           0 :             if (payload_type >= RTP_PT_PRIVATE)
     672           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
     673             :                                          payload_type);
     674           0 :             break;
     675           0 :         case AV_CODEC_ID_ADPCM_G722:
     676           0 :             if (payload_type >= RTP_PT_PRIVATE)
     677           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
     678             :                                          payload_type,
     679             :                                          8000, p->channels);
     680           0 :             break;
     681           0 :         case AV_CODEC_ID_ADPCM_G726: {
     682           0 :             if (payload_type >= RTP_PT_PRIVATE)
     683           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d AAL2-G726-%d/%d\r\n",
     684             :                                          payload_type,
     685           0 :                                          p->bits_per_coded_sample*8,
     686             :                                          p->sample_rate);
     687           0 :             break;
     688             :         }
     689           0 :         case AV_CODEC_ID_ADPCM_G726LE: {
     690           0 :             if (payload_type >= RTP_PT_PRIVATE)
     691           0 :                 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
     692             :                                          payload_type,
     693           0 :                                          p->bits_per_coded_sample*8,
     694             :                                          p->sample_rate);
     695           0 :             break;
     696             :         }
     697           0 :         case AV_CODEC_ID_ILBC:
     698           0 :             av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
     699             :                                     "a=fmtp:%d mode=%d\r\n",
     700             :                                      payload_type, p->sample_rate,
     701           0 :                                      payload_type, p->block_align == 38 ? 20 : 30);
     702           0 :             break;
     703           0 :         case AV_CODEC_ID_SPEEX:
     704           0 :             av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
     705             :                                      payload_type, p->sample_rate);
     706           0 :             if (st->codec) {
     707             :                 const char *mode;
     708             :                 uint64_t vad_option;
     709             : 
     710           0 :                 if (st->codec->flags & AV_CODEC_FLAG_QSCALE)
     711           0 :                       mode = "on";
     712           0 :                 else if (!av_opt_get_int(st->codec, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
     713           0 :                       mode = "vad";
     714             :                 else
     715           0 :                       mode = "off";
     716             : 
     717           0 :                 av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
     718             :                                         payload_type, mode);
     719             :             }
     720           0 :             break;
     721           0 :         case AV_CODEC_ID_OPUS:
     722             :             /* The opus RTP draft says that all opus streams MUST be declared
     723             :                as stereo, to avoid negotiation failures. The actual number of
     724             :                channels can change on a packet-by-packet basis. The number of
     725             :                channels a receiver prefers to receive or a sender plans to send
     726             :                can be declared via fmtp parameters (both default to mono), but
     727             :                receivers MUST be able to receive and process stereo packets. */
     728           0 :             av_strlcatf(buff, size, "a=rtpmap:%d opus/48000/2\r\n",
     729             :                                      payload_type);
     730           0 :             if (p->channels == 2) {
     731           0 :                 av_strlcatf(buff, size, "a=fmtp:%d sprop-stereo=1\r\n",
     732             :                                          payload_type);
     733             :             }
     734           0 :             break;
     735           0 :         default:
     736             :             /* Nothing special to do here... */
     737           0 :             break;
     738             :     }
     739             : 
     740           2 :     av_free(config);
     741             : 
     742           2 :     return buff;
     743             : }
     744             : 
     745           2 : void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
     746             :                         const char *dest_addr, const char *dest_type,
     747             :                         int port, int ttl, AVFormatContext *fmt)
     748             : {
     749           2 :     AVCodecParameters *p = st->codecpar;
     750             :     const char *type;
     751             :     int payload_type;
     752             : 
     753           2 :     payload_type = ff_rtp_get_payload_type(fmt, st->codecpar, idx);
     754             : 
     755           2 :     switch (p->codec_type) {
     756           1 :         case AVMEDIA_TYPE_VIDEO   : type = "video"      ; break;
     757           1 :         case AVMEDIA_TYPE_AUDIO   : type = "audio"      ; break;
     758           0 :         case AVMEDIA_TYPE_SUBTITLE: type = "text"       ; break;
     759           0 :         default                 : type = "application"; break;
     760             :     }
     761             : 
     762           2 :     av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
     763           2 :     sdp_write_address(buff, size, dest_addr, dest_type, ttl);
     764           2 :     if (p->bit_rate) {
     765           2 :         av_strlcatf(buff, size, "b=AS:%"PRId64"\r\n", p->bit_rate / 1000);
     766             :     }
     767             : 
     768           2 :     sdp_write_media_attributes(buff, size, st, payload_type, fmt);
     769           2 : }
     770             : 
     771           0 : int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
     772             : {
     773           0 :     AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
     774           0 :     struct sdp_session_level s = { 0 };
     775           0 :     int i, j, port, ttl, is_multicast, index = 0;
     776             :     char dst[32], dst_type[5];
     777             : 
     778           0 :     memset(buf, 0, size);
     779           0 :     s.user = "-";
     780           0 :     s.src_addr = "127.0.0.1";    /* FIXME: Properly set this */
     781           0 :     s.src_type = "IP4";
     782           0 :     s.name = title ? title->value : "No Name";
     783             : 
     784           0 :     port = 0;
     785           0 :     ttl = 0;
     786           0 :     if (n_files == 1) {
     787           0 :         port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
     788           0 :         is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
     789             :                                            sizeof(dst_type));
     790           0 :         if (!is_multicast)
     791           0 :             ttl = 0;
     792           0 :         if (dst[0]) {
     793           0 :             s.dst_addr = dst;
     794           0 :             s.dst_type = dst_type;
     795           0 :             s.ttl = ttl;
     796           0 :             if (!strcmp(dst_type, "IP6")) {
     797           0 :                 s.src_addr = "::1";
     798           0 :                 s.src_type = "IP6";
     799             :             }
     800             :         }
     801             :     }
     802           0 :     sdp_write_header(buf, size, &s);
     803             : 
     804           0 :     dst[0] = 0;
     805           0 :     for (i = 0; i < n_files; i++) {
     806           0 :         if (n_files != 1) {
     807           0 :             port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
     808           0 :             is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
     809             :                                                sizeof(dst_type));
     810           0 :             if (!is_multicast)
     811           0 :                 ttl = 0;
     812             :         }
     813           0 :         for (j = 0; j < ac[i]->nb_streams; j++) {
     814           0 :             ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
     815           0 :                                dst[0] ? dst : NULL, dst_type,
     816           0 :                                (port > 0) ? port + j * 2 : 0,
     817           0 :                                ttl, ac[i]);
     818           0 :             if (port <= 0) {
     819           0 :                 av_strlcatf(buf, size,
     820             :                                    "a=control:streamid=%d\r\n", i + j);
     821             :             }
     822           0 :             if (ac[i]->pb && ac[i]->pb->av_class) {
     823           0 :                 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
     824           0 :                 av_opt_get(ac[i]->pb, "srtp_out_suite",  AV_OPT_SEARCH_CHILDREN,
     825             :                            &crypto_suite);
     826           0 :                 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
     827             :                            &crypto_params);
     828           0 :                 if (crypto_suite && crypto_suite[0])
     829           0 :                     av_strlcatf(buf, size,
     830             :                                 "a=crypto:1 %s inline:%s\r\n",
     831             :                                 crypto_suite, crypto_params);
     832           0 :                 av_free(crypto_suite);
     833           0 :                 av_free(crypto_params);
     834             :             }
     835             :         }
     836             :     }
     837             : 
     838           0 :     return 0;
     839             : }
     840             : #else
     841             : int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
     842             : {
     843             :     return AVERROR(ENOSYS);
     844             : }
     845             : 
     846             : void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
     847             :                         const char *dest_addr, const char *dest_type,
     848             :                         int port, int ttl, AVFormatContext *fmt)
     849             : {
     850             : }
     851             : #endif

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