int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec, int idx) { int i; AVOutputFormat *ofmt = fmt ? fmt->oformat : NULL; /* Was the payload type already specified for the RTP muxer? */ if (ofmt && ofmt->priv_class && fmt->priv_data) { int64_t payload_type; if (av_opt_get_int(fmt->priv_data, "payload_type", 0, &payload_type) >= 0 && payload_type >= 0) return (int)payload_type; } /* static payload type */ for (i = 0; rtp_payload_types[i].pt >= 0; ++i) if (rtp_payload_types[i].codec_id == codec->codec_id) { if (codec->codec_id == AV_CODEC_ID_H263 && (!fmt || !fmt->oformat->priv_class || !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190"))) continue; /* G722 has 8000 as nominal rate even if the sample rate is 16000, * see section 4.5.2 in RFC 3551. */ if (codec->codec_id == AV_CODEC_ID_ADPCM_G722 && codec->sample_rate == 16000 && codec->channels == 1) return rtp_payload_types[i].pt; if (codec->codec_type == AVMEDIA_TYPE_AUDIO && ((rtp_payload_types[i].clock_rate > 0 && codec->sample_rate != rtp_payload_types[i].clock_rate) || (rtp_payload_types[i].audio_channels > 0 && codec->channels != rtp_payload_types[i].audio_channels))) continue; return rtp_payload_types[i].pt; } if (idx < 0) idx = codec->codec_type == AVMEDIA_TYPE_AUDIO; /* dynamic payload type */ return RTP_PT_PRIVATE + idx; }