yading@11: /*
yading@11:  * copyright (c) 2007 Luca Abeni
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include <string.h>
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/base64.h"
yading@11: #include "libavutil/dict.h"
yading@11: #include "libavutil/parseutils.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavcodec/xiph.h"
yading@11: #include "libavcodec/mpeg4audio.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "avc.h"
yading@11: #include "rtp.h"
yading@11: #if CONFIG_NETWORK
yading@11: #include "network.h"
yading@11: #endif
yading@11: 
yading@11: #if CONFIG_RTP_MUXER
yading@11: #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
yading@11: 
yading@11: struct sdp_session_level {
yading@11:     int sdp_version;      /**< protocol version (currently 0) */
yading@11:     int id;               /**< session ID */
yading@11:     int version;          /**< session version */
yading@11:     int start_time;       /**< session start time (NTP time, in seconds),
yading@11:                                or 0 in case of permanent session */
yading@11:     int end_time;         /**< session end time (NTP time, in seconds),
yading@11:                                or 0 if the session is not bounded */
yading@11:     int ttl;              /**< TTL, in case of multicast stream */
yading@11:     const char *user;     /**< username of the session's creator */
yading@11:     const char *src_addr; /**< IP address of the machine from which the session was created */
yading@11:     const char *src_type; /**< address type of src_addr */
yading@11:     const char *dst_addr; /**< destination IP address (can be multicast) */
yading@11:     const char *dst_type; /**< destination IP address type */
yading@11:     const char *name;     /**< session name (can be an empty string) */
yading@11: };
yading@11: 
yading@11: static void sdp_write_address(char *buff, int size, const char *dest_addr,
yading@11:                               const char *dest_type, int ttl)
yading@11: {
yading@11:     if (dest_addr) {
yading@11:         if (!dest_type)
yading@11:             dest_type = "IP4";
yading@11:         if (ttl > 0 && !strcmp(dest_type, "IP4")) {
yading@11:             /* The TTL should only be specified for IPv4 multicast addresses,
yading@11:              * not for IPv6. */
yading@11:             av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
yading@11:         } else {
yading@11:             av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
yading@11:         }
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
yading@11: {
yading@11:     av_strlcatf(buff, size, "v=%d\r\n"
yading@11:                             "o=- %d %d IN %s %s\r\n"
yading@11:                             "s=%s\r\n",
yading@11:                             s->sdp_version,
yading@11:                             s->id, s->version, s->src_type, s->src_addr,
yading@11:                             s->name);
yading@11:     sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
yading@11:     av_strlcatf(buff, size, "t=%d %d\r\n"
yading@11:                             "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
yading@11:                             s->start_time, s->end_time);
yading@11: }
yading@11: 
yading@11: #if CONFIG_NETWORK
yading@11: static int resolve_destination(char *dest_addr, int size, char *type,
yading@11:                                int type_size)
yading@11: {
yading@11:     struct addrinfo hints = { 0 }, *ai;
yading@11:     int is_multicast;
yading@11: 
yading@11:     av_strlcpy(type, "IP4", type_size);
yading@11:     if (!dest_addr[0])
yading@11:         return 0;
yading@11: 
yading@11:     /* Resolve the destination, since it must be written
yading@11:      * as a numeric IP address in the SDP. */
yading@11: 
yading@11:     if (getaddrinfo(dest_addr, NULL, &hints, &ai))
yading@11:         return 0;
yading@11:     getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
yading@11:                 NULL, 0, NI_NUMERICHOST);
yading@11: #ifdef AF_INET6
yading@11:     if (ai->ai_family == AF_INET6)
yading@11:         av_strlcpy(type, "IP6", type_size);
yading@11: #endif
yading@11:     is_multicast = ff_is_multicast_address(ai->ai_addr);
yading@11:     freeaddrinfo(ai);
yading@11:     return is_multicast;
yading@11: }
yading@11: #else
yading@11: static int resolve_destination(char *dest_addr, int size, char *type,
yading@11:                                int type_size)
yading@11: {
yading@11:     return 0;
yading@11: }
yading@11: #endif
yading@11: 
yading@11: static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
yading@11: {
yading@11:     int port;
yading@11:     const char *p;
yading@11:     char proto[32];
yading@11: 
yading@11:     av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
yading@11: 
yading@11:     *ttl = 0;
yading@11: 
yading@11:     if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
yading@11:         /* The url isn't for the actual rtp sessions,
yading@11:          * don't parse out anything else than the destination.
yading@11:          */
yading@11:         return 0;
yading@11:     }
yading@11: 
yading@11:     p = strchr(url, '?');
yading@11:     if (p) {
yading@11:         char buff[64];
yading@11: 
yading@11:         if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
yading@11:             *ttl = strtol(buff, NULL, 10);
yading@11:         } else {
yading@11:             *ttl = 5;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return port;
yading@11: }
yading@11: 
yading@11: #define MAX_PSET_SIZE 1024
yading@11: static char *extradata2psets(AVCodecContext *c)
yading@11: {
yading@11:     char *psets, *p;
yading@11:     const uint8_t *r;
yading@11:     static const char pset_string[] = "; sprop-parameter-sets=";
yading@11:     static const char profile_string[] = "; profile-level-id=";
yading@11:     uint8_t *orig_extradata = NULL;
yading@11:     int orig_extradata_size = 0;
yading@11:     const uint8_t *sps = NULL, *sps_end;
yading@11: 
yading@11:     if (c->extradata_size > MAX_EXTRADATA_SIZE) {
yading@11:         av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
yading@11: 
yading@11:         return NULL;
yading@11:     }
yading@11:     if (c->extradata[0] == 1) {
yading@11:         uint8_t *dummy_p;
yading@11:         int dummy_int;
yading@11:         AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
yading@11: 
yading@11:         if (!bsfc) {
yading@11:             av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
yading@11: 
yading@11:             return NULL;
yading@11:         }
yading@11: 
yading@11:         orig_extradata_size = c->extradata_size;
yading@11:         orig_extradata = av_mallocz(orig_extradata_size +
yading@11:                                     FF_INPUT_BUFFER_PADDING_SIZE);
yading@11:         if (!orig_extradata) {
yading@11:             av_bitstream_filter_close(bsfc);
yading@11:             return NULL;
yading@11:         }
yading@11:         memcpy(orig_extradata, c->extradata, orig_extradata_size);
yading@11:         av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
yading@11:         av_bitstream_filter_close(bsfc);
yading@11:     }
yading@11: 
yading@11:     psets = av_mallocz(MAX_PSET_SIZE);
yading@11:     if (psets == NULL) {
yading@11:         av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
yading@11:         av_free(orig_extradata);
yading@11:         return NULL;
yading@11:     }
yading@11:     memcpy(psets, pset_string, strlen(pset_string));
yading@11:     p = psets + strlen(pset_string);
yading@11:     r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size);
yading@11:     while (r < c->extradata + c->extradata_size) {
yading@11:         const uint8_t *r1;
yading@11:         uint8_t nal_type;
yading@11: 
yading@11:         while (!*(r++));
yading@11:         nal_type = *r & 0x1f;
yading@11:         r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size);
yading@11:         if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
yading@11:             r = r1;
yading@11:             continue;
yading@11:         }
yading@11:         if (p != (psets + strlen(pset_string))) {
yading@11:             *p = ',';
yading@11:             p++;
yading@11:         }
yading@11:         if (!sps) {
yading@11:             sps = r;
yading@11:             sps_end = r1;
yading@11:         }
yading@11:         if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
yading@11:             av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
yading@11:             av_free(psets);
yading@11: 
yading@11:             return NULL;
yading@11:         }
yading@11:         p += strlen(p);
yading@11:         r = r1;
yading@11:     }
yading@11:     if (sps && sps_end - sps >= 4) {
yading@11:         memcpy(p, profile_string, strlen(profile_string));
yading@11:         p += strlen(p);
yading@11:         ff_data_to_hex(p, sps + 1, 3, 0);
yading@11:         p[6] = '\0';
yading@11:     }
yading@11:     if (orig_extradata) {
yading@11:         av_free(c->extradata);
yading@11:         c->extradata      = orig_extradata;
yading@11:         c->extradata_size = orig_extradata_size;
yading@11:     }
yading@11: 
yading@11:     return psets;
yading@11: }
yading@11: 
yading@11: static char *extradata2config(AVCodecContext *c)
yading@11: {
yading@11:     char *config;
yading@11: 
yading@11:     if (c->extradata_size > MAX_EXTRADATA_SIZE) {
yading@11:         av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
yading@11: 
yading@11:         return NULL;
yading@11:     }
yading@11:     config = av_malloc(10 + c->extradata_size * 2);
yading@11:     if (config == NULL) {
yading@11:         av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
yading@11:         return NULL;
yading@11:     }
yading@11:     memcpy(config, "; config=", 9);
yading@11:     ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
yading@11:     config[9 + c->extradata_size * 2] = 0;
yading@11: 
yading@11:     return config;
yading@11: }
yading@11: 
yading@11: static char *xiph_extradata2config(AVCodecContext *c)
yading@11: {
yading@11:     char *config, *encoded_config;
yading@11:     uint8_t *header_start[3];
yading@11:     int headers_len, header_len[3], config_len;
yading@11:     int first_header_size;
yading@11: 
yading@11:     switch (c->codec_id) {
yading@11:     case AV_CODEC_ID_THEORA:
yading@11:         first_header_size = 42;
yading@11:         break;
yading@11:     case AV_CODEC_ID_VORBIS:
yading@11:         first_header_size = 30;
yading@11:         break;
yading@11:     default:
yading@11:         av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
yading@11:         return NULL;
yading@11:     }
yading@11: 
yading@11:     if (avpriv_split_xiph_headers(c->extradata, c->extradata_size,
yading@11:                               first_header_size, header_start,
yading@11:                               header_len) < 0) {
yading@11:         av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
yading@11:         return NULL;
yading@11:     }
yading@11: 
yading@11:     headers_len = header_len[0] + header_len[2];
yading@11:     config_len = 4 +          // count
yading@11:                  3 +          // ident
yading@11:                  2 +          // packet size
yading@11:                  1 +          // header count
yading@11:                  2 +          // header size
yading@11:                  headers_len; // and the rest
yading@11: 
yading@11:     config = av_malloc(config_len);
yading@11:     if (!config)
yading@11:         goto xiph_fail;
yading@11: 
yading@11:     encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
yading@11:     if (!encoded_config) {
yading@11:         av_free(config);
yading@11:         goto xiph_fail;
yading@11:     }
yading@11: 
yading@11:     config[0] = config[1] = config[2] = 0;
yading@11:     config[3] = 1;
yading@11:     config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
yading@11:     config[5] = (RTP_XIPH_IDENT >>  8) & 0xff;
yading@11:     config[6] = (RTP_XIPH_IDENT      ) & 0xff;
yading@11:     config[7] = (headers_len >> 8) & 0xff;
yading@11:     config[8] = headers_len & 0xff;
yading@11:     config[9] = 2;
yading@11:     config[10] = header_len[0];
yading@11:     config[11] = 0; // size of comment header; nonexistent
yading@11:     memcpy(config + 12, header_start[0], header_len[0]);
yading@11:     memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
yading@11: 
yading@11:     av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
yading@11:                      config, config_len);
yading@11:     av_free(config);
yading@11: 
yading@11:     return encoded_config;
yading@11: 
yading@11: xiph_fail:
yading@11:     av_log(c, AV_LOG_ERROR,
yading@11:            "Not enough memory for configuration string\n");
yading@11:     return NULL;
yading@11: }
yading@11: 
yading@11: static int latm_context2profilelevel(AVCodecContext *c)
yading@11: {
yading@11:     /* MP4A-LATM
yading@11:      * The RTP payload format specification is described in RFC 3016
yading@11:      * The encoding specifications are provided in ISO/IEC 14496-3 */
yading@11: 
yading@11:     int profile_level = 0x2B;
yading@11: 
yading@11:     /* TODO: AAC Profile only supports AAC LC Object Type.
yading@11:      * Different Object Types should implement different Profile Levels */
yading@11: 
yading@11:     if (c->sample_rate <= 24000) {
yading@11:         if (c->channels <= 2)
yading@11:             profile_level = 0x28; // AAC Profile, Level 1
yading@11:     } else if (c->sample_rate <= 48000) {
yading@11:         if (c->channels <= 2) {
yading@11:             profile_level = 0x29; // AAC Profile, Level 2
yading@11:         } else if (c->channels <= 5) {
yading@11:             profile_level = 0x2A; // AAC Profile, Level 4
yading@11:         }
yading@11:     } else if (c->sample_rate <= 96000) {
yading@11:         if (c->channels <= 5) {
yading@11:             profile_level = 0x2B; // AAC Profile, Level 5
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return profile_level;
yading@11: }
yading@11: 
yading@11: static char *latm_context2config(AVCodecContext *c)
yading@11: {
yading@11:     /* MP4A-LATM
yading@11:      * The RTP payload format specification is described in RFC 3016
yading@11:      * The encoding specifications are provided in ISO/IEC 14496-3 */
yading@11: 
yading@11:     uint8_t config_byte[6];
yading@11:     int rate_index;
yading@11:     char *config;
yading@11: 
yading@11:     for (rate_index = 0; rate_index < 16; rate_index++)
yading@11:         if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate)
yading@11:             break;
yading@11:     if (rate_index == 16) {
yading@11:         av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n");
yading@11:         return NULL;
yading@11:     }
yading@11: 
yading@11:     config_byte[0] = 0x40;
yading@11:     config_byte[1] = 0;
yading@11:     config_byte[2] = 0x20 | rate_index;
yading@11:     config_byte[3] = c->channels << 4;
yading@11:     config_byte[4] = 0x3f;
yading@11:     config_byte[5] = 0xc0;
yading@11: 
yading@11:     config = av_malloc(6*2+1);
yading@11:     if (!config) {
yading@11:         av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
yading@11:         return NULL;
yading@11:     }
yading@11:     ff_data_to_hex(config, config_byte, 6, 1);
yading@11:     config[12] = 0;
yading@11: 
yading@11:     return config;
yading@11: }
yading@11: 
yading@11: static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt)
yading@11: {
yading@11:     char *config = NULL;
yading@11: 
yading@11:     switch (c->codec_id) {
yading@11:         case AV_CODEC_ID_H264: {
yading@11:             int mode = 1;
yading@11:             if (fmt && fmt->oformat->priv_class &&
yading@11:                 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
yading@11:                 mode = 0;
yading@11:             if (c->extradata_size) {
yading@11:                 config = extradata2psets(c);
yading@11:             }
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
yading@11:                                     "a=fmtp:%d packetization-mode=%d%s\r\n",
yading@11:                                      payload_type,
yading@11:                                      payload_type, mode, config ? config : "");
yading@11:             break;
yading@11:         }
yading@11:         case AV_CODEC_ID_H263:
yading@11:         case AV_CODEC_ID_H263P:
yading@11:             /* a=framesize is required by 3GPP TS 26.234 (PSS). It
yading@11:              * actually specifies the maximum video size, but we only know
yading@11:              * the current size. This is required for playback on Android
yading@11:              * stagefright and on Samsung bada. */
yading@11:             if (!fmt || !fmt->oformat->priv_class ||
yading@11:                 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
yading@11:                 c->codec_id == AV_CODEC_ID_H263P)
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
yading@11:                                     "a=framesize:%d %d-%d\r\n",
yading@11:                                     payload_type,
yading@11:                                     payload_type, c->width, c->height);
yading@11:             break;
yading@11:         case AV_CODEC_ID_MPEG4:
yading@11:             if (c->extradata_size) {
yading@11:                 config = extradata2config(c);
yading@11:             }
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
yading@11:                                     "a=fmtp:%d profile-level-id=1%s\r\n",
yading@11:                                      payload_type,
yading@11:                                      payload_type, config ? config : "");
yading@11:             break;
yading@11:         case AV_CODEC_ID_AAC:
yading@11:             if (fmt && fmt->oformat && fmt->oformat->priv_class &&
yading@11:                 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
yading@11:                 config = latm_context2config(c);
yading@11:                 if (!config)
yading@11:                     return NULL;
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
yading@11:                                         "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
yading@11:                                          payload_type, c->sample_rate, c->channels,
yading@11:                                          payload_type, latm_context2profilelevel(c), config);
yading@11:             } else {
yading@11:                 if (c->extradata_size) {
yading@11:                     config = extradata2config(c);
yading@11:                 } else {
yading@11:                     /* FIXME: maybe we can forge config information based on the
yading@11:                      *        codec parameters...
yading@11:                      */
yading@11:                     av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
yading@11:                     return NULL;
yading@11:                 }
yading@11:                 if (config == NULL) {
yading@11:                     return NULL;
yading@11:                 }
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
yading@11:                                         "a=fmtp:%d profile-level-id=1;"
yading@11:                                         "mode=AAC-hbr;sizelength=13;indexlength=3;"
yading@11:                                         "indexdeltalength=3%s\r\n",
yading@11:                                          payload_type, c->sample_rate, c->channels,
yading@11:                                          payload_type, config);
yading@11:             }
yading@11:             break;
yading@11:         case AV_CODEC_ID_PCM_S16BE:
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
yading@11:                                          payload_type,
yading@11:                                          c->sample_rate, c->channels);
yading@11:             break;
yading@11:         case AV_CODEC_ID_PCM_MULAW:
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
yading@11:                                          payload_type,
yading@11:                                          c->sample_rate, c->channels);
yading@11:             break;
yading@11:         case AV_CODEC_ID_PCM_ALAW:
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
yading@11:                                          payload_type,
yading@11:                                          c->sample_rate, c->channels);
yading@11:             break;
yading@11:         case AV_CODEC_ID_AMR_NB:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
yading@11:                                     "a=fmtp:%d octet-align=1\r\n",
yading@11:                                      payload_type, c->sample_rate, c->channels,
yading@11:                                      payload_type);
yading@11:             break;
yading@11:         case AV_CODEC_ID_AMR_WB:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
yading@11:                                     "a=fmtp:%d octet-align=1\r\n",
yading@11:                                      payload_type, c->sample_rate, c->channels,
yading@11:                                      payload_type);
yading@11:             break;
yading@11:         case AV_CODEC_ID_VORBIS:
yading@11:             if (c->extradata_size)
yading@11:                 config = xiph_extradata2config(c);
yading@11:             else
yading@11:                 av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
yading@11:             if (!config)
yading@11:                 return NULL;
yading@11: 
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
yading@11:                                     "a=fmtp:%d configuration=%s\r\n",
yading@11:                                     payload_type, c->sample_rate, c->channels,
yading@11:                                     payload_type, config);
yading@11:             break;
yading@11:         case AV_CODEC_ID_THEORA: {
yading@11:             const char *pix_fmt;
yading@11:             if (c->extradata_size)
yading@11:                 config = xiph_extradata2config(c);
yading@11:             else
yading@11:                 av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
yading@11:             if (!config)
yading@11:                 return NULL;
yading@11: 
yading@11:             switch (c->pix_fmt) {
yading@11:             case AV_PIX_FMT_YUV420P:
yading@11:                 pix_fmt = "YCbCr-4:2:0";
yading@11:                 break;
yading@11:             case AV_PIX_FMT_YUV422P:
yading@11:                 pix_fmt = "YCbCr-4:2:2";
yading@11:                 break;
yading@11:             case AV_PIX_FMT_YUV444P:
yading@11:                 pix_fmt = "YCbCr-4:4:4";
yading@11:                 break;
yading@11:             default:
yading@11:                 av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
yading@11:                 return NULL;
yading@11:             }
yading@11: 
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
yading@11:                                     "a=fmtp:%d delivery-method=inline; "
yading@11:                                     "width=%d; height=%d; sampling=%s; "
yading@11:                                     "configuration=%s\r\n",
yading@11:                                     payload_type, payload_type,
yading@11:                                     c->width, c->height, pix_fmt, config);
yading@11:             break;
yading@11:         }
yading@11:         case AV_CODEC_ID_VP8:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
yading@11:                                      payload_type);
yading@11:             break;
yading@11:         case AV_CODEC_ID_MJPEG:
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
yading@11:                                          payload_type);
yading@11:             break;
yading@11:         case AV_CODEC_ID_ADPCM_G722:
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
yading@11:                                          payload_type,
yading@11:                                          8000, c->channels);
yading@11:             break;
yading@11:         case AV_CODEC_ID_ADPCM_G726: {
yading@11:             if (payload_type >= RTP_PT_PRIVATE)
yading@11:                 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
yading@11:                                          payload_type,
yading@11:                                          c->bits_per_coded_sample*8,
yading@11:                                          c->sample_rate);
yading@11:             break;
yading@11:         }
yading@11:         case AV_CODEC_ID_ILBC:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
yading@11:                                     "a=fmtp:%d mode=%d\r\n",
yading@11:                                      payload_type, c->sample_rate,
yading@11:                                      payload_type, c->block_align == 38 ? 20 : 30);
yading@11:             break;
yading@11:         case AV_CODEC_ID_SPEEX:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
yading@11:                                      payload_type, c->sample_rate);
yading@11:             if (c->codec) {
yading@11:                 const char *mode;
yading@11:                 uint64_t vad_option;
yading@11: 
yading@11:                 if (c->flags & CODEC_FLAG_QSCALE)
yading@11:                       mode = "on";
yading@11:                 else if (!av_opt_get_int(c, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
yading@11:                       mode = "vad";
yading@11:                 else
yading@11:                       mode = "off";
yading@11: 
yading@11:                 av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
yading@11:                                         payload_type, mode);
yading@11:             }
yading@11:             break;
yading@11:         case AV_CODEC_ID_OPUS:
yading@11:             av_strlcatf(buff, size, "a=rtpmap:%d opus/48000\r\n",
yading@11:                                      payload_type);
yading@11:             break;
yading@11:         default:
yading@11:             /* Nothing special to do here... */
yading@11:             break;
yading@11:     }
yading@11: 
yading@11:     av_free(config);
yading@11: 
yading@11:     return buff;
yading@11: }
yading@11: 
yading@11: void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
yading@11:                         const char *dest_addr, const char *dest_type,
yading@11:                         int port, int ttl, AVFormatContext *fmt)
yading@11: {
yading@11:     AVCodecContext *c = st->codec;
yading@11:     const char *type;
yading@11:     int payload_type;
yading@11: 
yading@11:     payload_type = ff_rtp_get_payload_type(fmt, c, idx);
yading@11: 
yading@11:     switch (c->codec_type) {
yading@11:         case AVMEDIA_TYPE_VIDEO   : type = "video"      ; break;
yading@11:         case AVMEDIA_TYPE_AUDIO   : type = "audio"      ; break;
yading@11:         case AVMEDIA_TYPE_SUBTITLE: type = "text"       ; break;
yading@11:         default                 : type = "application"; break;
yading@11:     }
yading@11: 
yading@11:     av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
yading@11:     sdp_write_address(buff, size, dest_addr, dest_type, ttl);
yading@11:     if (c->bit_rate) {
yading@11:         av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
yading@11:     }
yading@11: 
yading@11:     sdp_write_media_attributes(buff, size, c, payload_type, fmt);
yading@11: }
yading@11: 
yading@11: int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
yading@11: {
yading@11:     AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
yading@11:     struct sdp_session_level s = { 0 };
yading@11:     int i, j, port, ttl, is_multicast, index = 0;
yading@11:     char dst[32], dst_type[5];
yading@11: 
yading@11:     memset(buf, 0, size);
yading@11:     s.user = "-";
yading@11:     s.src_addr = "127.0.0.1";    /* FIXME: Properly set this */
yading@11:     s.src_type = "IP4";
yading@11:     s.name = title ? title->value : "No Name";
yading@11: 
yading@11:     port = 0;
yading@11:     ttl = 0;
yading@11:     if (n_files == 1) {
yading@11:         port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
yading@11:         is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
yading@11:                                            sizeof(dst_type));
yading@11:         if (!is_multicast)
yading@11:             ttl = 0;
yading@11:         if (dst[0]) {
yading@11:             s.dst_addr = dst;
yading@11:             s.dst_type = dst_type;
yading@11:             s.ttl = ttl;
yading@11:             if (!strcmp(dst_type, "IP6")) {
yading@11:                 s.src_addr = "::1";
yading@11:                 s.src_type = "IP6";
yading@11:             }
yading@11:         }
yading@11:     }
yading@11:     sdp_write_header(buf, size, &s);
yading@11: 
yading@11:     dst[0] = 0;
yading@11:     for (i = 0; i < n_files; i++) {
yading@11:         if (n_files != 1) {
yading@11:             port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
yading@11:             is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
yading@11:                                                sizeof(dst_type));
yading@11:             if (!is_multicast)
yading@11:                 ttl = 0;
yading@11:         }
yading@11:         for (j = 0; j < ac[i]->nb_streams; j++) {
yading@11:             ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
yading@11:                                dst[0] ? dst : NULL, dst_type,
yading@11:                                (port > 0) ? port + j * 2 : 0,
yading@11:                                ttl, ac[i]);
yading@11:             if (port <= 0) {
yading@11:                 av_strlcatf(buf, size,
yading@11:                                    "a=control:streamid=%d\r\n", i + j);
yading@11:             }
yading@11:             if (ac[i]->pb && ac[i]->pb->av_class) {
yading@11:                 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
yading@11:                 av_opt_get(ac[i]->pb, "srtp_out_suite",  AV_OPT_SEARCH_CHILDREN,
yading@11:                            &crypto_suite);
yading@11:                 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
yading@11:                            &crypto_params);
yading@11:                 if (crypto_suite && crypto_suite[0])
yading@11:                     av_strlcatf(buf, size,
yading@11:                                 "a=crypto:1 %s inline:%s\r\n",
yading@11:                                 crypto_suite, crypto_params);
yading@11:                 av_free(crypto_suite);
yading@11:                 av_free(crypto_params);
yading@11:             }
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: #else
yading@11: int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
yading@11: {
yading@11:     return AVERROR(ENOSYS);
yading@11: }
yading@11: 
yading@11: void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
yading@11:                         const char *dest_addr, const char *dest_type,
yading@11:                         int port, int ttl, AVFormatContext *fmt)
yading@11: {
yading@11: }
yading@11: #endif