/*
  * RTP definitions

  * Copyright (c) 2002 Fabrice Bellard

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  */

 #ifndef AVFORMAT_RTP_H
 #define AVFORMAT_RTP_H

 #include "libavcodec/avcodec.h"

 /**
  * Return the payload type for a given codec.
  *
  * @param codec The context of the codec
  * @return In case of unknown payload type or dynamic payload type, a
  * negative value is returned; otherwise, the payload type (the 'PT' field
  * in the RTP header) is returned.
  */

 int ff_rtp_get_payload_type(AVCodecContext *codec);

 /**
  * Initialize a codec context based on the payload type.
  *
  * Fill the codec_type and codec_id fields of a codec context with
  * information depending on the payload type; for audio codecs, the
  * channels and sample_rate fields are also filled.
  *
  * @param codec The context of the codec

  * @param payload_type The payload type (the 'PT' field in the RTP header)

  * @return In case of unknown payload type or dynamic payload type, a
  * negative value is returned; otherwise, 0 is returned
  */

 int ff_rtp_get_codec_info(AVCodecContext *codec, int payload_type);

 
 /**
  * Return the encoding name (as defined in
  * http://www.iana.org/assignments/rtp-parameters) for a given payload type.
  *
  * @param payload_type The payload type (the 'PT' field in the RTP header)
  * @return In case of unknown payload type or dynamic payload type, a pointer
  * to an empty string is returned; otherwise, a pointer to a string containing
  * the encoding name is returned
  */

 const char *ff_rtp_enc_name(int payload_type);

 
 /**
  * Return the codec id for the given encoding name and codec type.
  *
  * @param buf A pointer to the string containing the encoding name
  * @param codec_type The codec type
  * @return In case of unknown encoding name, CODEC_ID_NONE is returned;
  * otherwise, the codec id is returned
  */

 enum CodecID ff_rtp_codec_id(const char *buf, enum AVMediaType codec_type);

 #define RTP_PT_PRIVATE 96
 #define RTP_VERSION 2

 #define RTP_MAX_SDES 256   /**< maximum text length for SDES */

 
 /* RTCP paquets use 0.5 % of the bandwidth */
 #define RTCP_TX_RATIO_NUM 5
 #define RTCP_TX_RATIO_DEN 1000
 

 /* An arbitrary id value for RTP Xiph streams - only relevant to indicate
  * the the configuration has changed within a stream (by changing the
  * ident value sent).
  */
 #define RTP_XIPH_IDENT 0xfecdba
 

 /* RTCP packet types */
 enum RTCPType {
     RTCP_SR     = 200,
     RTCP_RR,   // 201
     RTCP_SDES, // 202
     RTCP_BYE,  // 203
     RTCP_APP   // 204
 };
 

 #endif /* AVFORMAT_RTP_H */