FFmpeg: libavformat/rtp.h File Reference

FFmpeg

libavformat

rtp.h File Reference

#include <stdint.h>
#include "libavutil/avutil.h"
#include "libavcodec/codec_id.h"
#include "libavcodec/codec_par.h"
#include "libavformat/avformat.h"

Go to the source code of this file.

Macros

#define RTP_PT_PRIVATE 96

#define RTP_VERSION 2

#define RTP_MAX_SDES 256

maximum text length for SDES More...

#define RTCP_TX_RATIO_NUM 5

#define RTCP_TX_RATIO_DEN 1000

#define RTP_XIPH_IDENT 0xfecdba

#define RTP_PT_IS_RTCP(x)

#define NTP_TO_RTP_FORMAT(x) av_rescale((x), INT64_C(1) << 32, 1000000)

Enumerations

enum RTCPType {
  RTCP_FIR = 192, RTCP_NACK, RTCP_SMPTETC, RTCP_IJ,
  RTCP_SR = 200, RTCP_RR, RTCP_SDES, RTCP_BYE,
  RTCP_APP, RTCP_RTPFB, RTCP_PSFB, RTCP_XR,
  RTCP_AVB, RTCP_RSI, RTCP_TOKEN
}

Functions

int ff_rtp_get_payload_type (const AVFormatContext *fmt, const AVCodecParameters *par, int idx)

Return the payload type for a given stream used in the given format context. More...

int ff_rtp_get_codec_info (AVCodecParameters *par, int payload_type)

Initialize a codec context based on the payload type. More...

const char * ff_rtp_enc_name (int payload_type)

Return the encoding name (as defined in http://www.iana.org/assignments/rtp-parameters) for a given payload type. More...

enum AVCodecID ff_rtp_codec_id (const char *buf, enum AVMediaType codec_type)

Return the codec id for the given encoding name and codec type. More...

Macro Definition Documentation

◆ RTP_PT_PRIVATE

#define RTP_PT_PRIVATE 96

Definition at line 79 of file rtp.h.

◆ RTP_VERSION

#define RTP_VERSION 2

Definition at line 80 of file rtp.h.

◆ RTP_MAX_SDES

#define RTP_MAX_SDES 256

maximum text length for SDES

Definition at line 81 of file rtp.h.

◆ RTCP_TX_RATIO_NUM

#define RTCP_TX_RATIO_NUM 5

Definition at line 84 of file rtp.h.

◆ RTCP_TX_RATIO_DEN

#define RTCP_TX_RATIO_DEN 1000

Definition at line 85 of file rtp.h.

◆ RTP_XIPH_IDENT

#define RTP_XIPH_IDENT 0xfecdba

Definition at line 91 of file rtp.h.

◆ RTP_PT_IS_RTCP

#define RTP_PT_IS_RTCP ( x )

Value:

(((x) >= RTCP_FIR && (x) <= RTCP_IJ) || \

((x) >= RTCP_SR && (x) <= RTCP_TOKEN))

Definition at line 112 of file rtp.h.

◆ NTP_TO_RTP_FORMAT

#define NTP_TO_RTP_FORMAT ( x ) av_rescale((x), INT64_C(1) << 32, 1000000)

Definition at line 115 of file rtp.h.

Enumeration Type Documentation

◆ RTCPType

enum RTCPType

Enumerator
RTCP_FIR
RTCP_NACK
RTCP_SMPTETC
RTCP_IJ
RTCP_SR
RTCP_RR
RTCP_SDES
RTCP_BYE
RTCP_APP
RTCP_RTPFB
RTCP_PSFB
RTCP_XR
RTCP_AVB
RTCP_RSI
RTCP_TOKEN

Definition at line 94 of file rtp.h.

Function Documentation

◆ ff_rtp_get_payload_type()

int ff_rtp_get_payload_type ( const AVFormatContext * fmt,

const AVCodecParameters * par,

int idx

)

Return the payload type for a given stream used in the given format context.

Static payload types are derived from the codec. Dynamic payload type are derived from the id field in AVStream. The format context private option payload_type overrides both.

Parameters: fmt The context of the format

par The codec parameters

idx The stream index

Returns: The payload type (the 'PT' field in the RTP header).

Definition at line 93 of file rtp.c.

Referenced by ff_rtp_chain_mux_open(), and rtp_write_header().

◆ ff_rtp_get_codec_info()

int ff_rtp_get_codec_info ( AVCodecParameters * par,

int payload_type

)

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.

Parameters: par The codec parameters

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

Returns: In case of unknown payload type or dynamic payload type, a negative value is returned; otherwise, 0 is returned

Definition at line 71 of file rtp.c.

◆ ff_rtp_enc_name()

const char* ff_rtp_enc_name ( int payload_type )

Return the encoding name (as defined in http://www.iana.org/assignments/rtp-parameters) for a given payload type.

Parameters: payload_type The payload type (the 'PT' field in the RTP header)

Returns: 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

Definition at line 135 of file rtp.c.