1/* 2 * RTP definitions 3 * Copyright (c) 2002 Fabrice Bellard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21#ifndef AVFORMAT_RTP_H 22#define AVFORMAT_RTP_H 23 24#include "libavcodec/avcodec.h" 25 26/** 27 * Return the payload type for a given codec. 28 * 29 * @param codec The context of the codec 30 * @return In case of unknown payload type or dynamic payload type, a 31 * negative value is returned; otherwise, the payload type (the 'PT' field 32 * in the RTP header) is returned. 33 */ 34int ff_rtp_get_payload_type(AVCodecContext *codec); 35 36/** 37 * Initialize a codec context based on the payload type. 38 * 39 * Fill the codec_type and codec_id fields of a codec context with 40 * information depending on the payload type; for audio codecs, the 41 * channels and sample_rate fields are also filled. 42 * 43 * @param codec The context of the codec 44 * @param payload_type The payload type (the 'PT' field in the RTP header) 45 * @return In case of unknown payload type or dynamic payload type, a 46 * negative value is returned; otherwise, 0 is returned 47 */ 48int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type); 49 50/** 51 * Return the encoding name (as defined in 52 * http://www.iana.org/assignments/rtp-parameters) for a given payload type. 53 * 54 * @param payload_type The payload type (the 'PT' field in the RTP header) 55 * @return In case of unknown payload type or dynamic payload type, a pointer 56 * to an empty string is returned; otherwise, a pointer to a string containing 57 * the encoding name is returned 58 */ 59const char *ff_rtp_enc_name(int payload_type); 60 61/** 62 * Return the codec id for the given encoding name and codec type. 63 * 64 * @param buf A pointer to the string containing the encoding name 65 * @param codec_type The codec type 66 * @return In case of unknown encoding name, CODEC_ID_NONE is returned; 67 * otherwise, the codec id is returned 68 */ 69enum CodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type); 70 71#define RTP_PT_PRIVATE 96 72#define RTP_VERSION 2 73#define RTP_MAX_SDES 256 /**< maximum text length for SDES */ 74 75/* RTCP paquets use 0.5 % of the bandwidth */ 76#define RTCP_TX_RATIO_NUM 5 77#define RTCP_TX_RATIO_DEN 1000 78 79#endif /* AVFORMAT_RTP_H */ 80