mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.2 KiB
96 lines
3.2 KiB
/* |
|
* RTP definitions |
|
* Copyright (c) 2002 Fabrice Bellard |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; 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 "libavformat/avformat.h" |
|
#include "libavcodec/avcodec.h" |
|
|
|
/** |
|
* Return the payload type for a given codec used in the given format context. |
|
* |
|
* @param fmt The context of the format |
|
* @param codec The context of the codec |
|
* @return The payload type (the 'PT' field in the RTP header). |
|
*/ |
|
int ff_rtp_get_payload_type(AVFormatContext *fmt, 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 packets 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 |
|
}; |
|
|
|
#define RTP_PT_IS_RTCP(x) ((x) >= RTCP_SR && (x) <= RTCP_APP) |
|
|
|
#endif /* AVFORMAT_RTP_H */
|
|
|