Functions | Variables
rtp.c File Reference
#include "libavutil/opt.h"
#include "avformat.h"
#include "rtp.h"
Include dependency graph for rtp.c:

Go to the source code of this file.

Functions

int ff_rtp_get_codec_info (AVCodecContext *codec, int payload_type)
 Initialize a codec context based on the payload type. More...
 
int ff_rtp_get_payload_type (AVFormatContext *fmt, AVCodecContext *codec, int idx)
 Return the payload type for a given stream used in the given format context. 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...
 

Variables

struct {
   int   pt
 
   const char   enc_name [6]
 
   enum AVMediaType   codec_type
 
   enum AVCodecID   codec_id
 
   int   clock_rate
 
   int   audio_channels
 
} rtp_payload_types []
 

Function Documentation

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.

Parameters
bufA pointer to the string containing the encoding name
codec_typeThe codec type
Returns
In case of unknown encoding name, AV_CODEC_ID_NONE is returned; otherwise, the codec id is returned

Definition at line 142 of file rtp.c.

Referenced by get_sockaddr().

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_typeThe 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 131 of file rtp.c.

Referenced by get_sockaddr().

int ff_rtp_get_codec_info ( AVCodecContext *  codec,
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
codecThe context of the codec
payload_typeThe 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 70 of file rtp.c.

Referenced by ff_rtsp_open_transport_ctx(), and get_sockaddr().

int ff_rtp_get_payload_type ( AVFormatContext *  fmt,
AVCodecContext *  codec,
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
fmtThe context of the format
codecThe context of the codec
idxThe stream index
Returns
The payload type (the 'PT' field in the RTP header).

Definition at line 89 of file rtp.c.

Referenced by ff_rtp_chain_mux_open(), and rtp_write_header().

Variable Documentation

int audio_channels

Definition at line 39 of file rtp.c.

Referenced by ff_rtp_get_codec_info(), and new_audio_stream().

int clock_rate

Definition at line 38 of file rtp.c.

Referenced by ff_rtp_get_codec_info().

enum AVCodecID codec_id

Definition at line 37 of file rtp.c.

Referenced by ff_rtp_get_codec_info(), and ff_rtp_get_payload_type().

enum AVMediaType codec_type

Definition at line 36 of file rtp.c.

Referenced by avcodec_alloc_context3(), avcodec_string(), avi_read_header(), build_feed_streams(), create_stream(), get_sockaddr(), mov_write_moov_tag(), and new_stream().

const char enc_name[6]

Definition at line 35 of file rtp.c.

Referenced by ff_rtp_codec_id().

int pt

Definition at line 34 of file rtp.c.

Referenced by av_aes_init(), ff_rtp_enc_name(), ff_rtp_get_codec_info(), vp5_parse_coeff(), vp5_parse_coeff_models(), vp6_decode_free_context(), vp6_parse_coeff(), vp6_parse_coeff_huffman(), and vp6_parse_coeff_models().

const { ... } rtp_payload_types[]
Initial value:
= {
{0, "PCMU", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_MULAW, 8000, 1},
{3, "GSM", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{4, "G723", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_G723_1, 8000, 1},
{5, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{6, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 16000, 1},
{7, "LPC", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{8, "PCMA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_ALAW, 8000, 1},
{9, "G722", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_ADPCM_G722, 8000, 1},
{10, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 2},
{11, "L16", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_PCM_S16BE, 44100, 1},
{12, "QCELP", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_QCELP, 8000, 1},
{13, "CN", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP2, -1, -1},
{14, "MPA", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_MP3, -1, -1},
{15, "G728", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{16, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 11025, 1},
{17, "DVI4", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 22050, 1},
{18, "G729", AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_NONE, 8000, 1},
{25, "CelB", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1},
{26, "JPEG", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MJPEG, 90000, -1},
{28, "nv", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_NONE, 90000, -1},
{31, "H261", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H261, 90000, -1},
{32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG1VIDEO, 90000, -1},
{32, "MPV", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_MPEG2VIDEO, 90000, -1},
{33, "MP2T", AVMEDIA_TYPE_DATA, AV_CODEC_ID_MPEG2TS, 90000, -1},
{34, "H263", AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H263, 90000, -1},
{-1, "", AVMEDIA_TYPE_UNKNOWN, AV_CODEC_ID_NONE, -1, -1}
}
AV_CODEC_ID_NONE
Definition: libavcodec/avcodec.h:100
AV_CODEC_ID_ADPCM_G722
Definition: libavcodec/avcodec.h:360
AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:145
AV_CODEC_ID_G723_1
Definition: libavcodec/avcodec.h:434
AV_CODEC_ID_MJPEG
Definition: libavcodec/avcodec.h:110
AV_CODEC_ID_MPEG1VIDEO
Definition: libavcodec/avcodec.h:103
AV_CODEC_ID_H261
Definition: libavcodec/avcodec.h:106
AV_CODEC_ID_PCM_ALAW
Definition: libavcodec/avcodec.h:306
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: libavcodec/avcodec.h:382
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:144
AV_CODEC_ID_H263
Definition: libavcodec/avcodec.h:107
AVMEDIA_TYPE_UNKNOWN
Usually treated as AVMEDIA_TYPE_DATA.
Definition: avutil.h:142
AV_CODEC_ID_PCM_S16BE
Definition: libavcodec/avcodec.h:300
AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: libavcodec/avcodec.h:104
AV_CODEC_ID_QCELP
Definition: libavcodec/avcodec.h:405
AV_CODEC_ID_PCM_MULAW
Definition: libavcodec/avcodec.h:305
AV_CODEC_ID_MP2
Definition: libavcodec/avcodec.h:381
AV_CODEC_ID_MPEG2TS
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: libavcodec/avcodec.h:492
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:143

Referenced by ff_rtp_codec_id(), ff_rtp_enc_name(), ff_rtp_get_codec_info(), and ff_rtp_get_payload_type().

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