SDP utilities (headers) More...

#include <inttypes.h>
#include <glib.h>
#include "refcount.h"

Include dependency graph for sdp-utils.h:

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Data Structures
struct	janus_sdp
	Janus SDP internal object representation. More...

struct	janus_sdp_mline
	SDP m-line representation. More...

struct	janus_sdp_attribute
	SDP a= attribute representation. More...

Typedefs
typedef struct janus_sdp	janus_sdp
	Janus SDP internal object representation.

typedef enum janus_sdp_mtype	janus_sdp_mtype
	Helper enumeration to quickly identify m-line media types.

typedef enum janus_sdp_mdirection	janus_sdp_mdirection
	Helper enumeration to quickly identify m-line directions.

typedef struct janus_sdp_mline	janus_sdp_mline
	SDP m-line representation.

typedef struct janus_sdp_attribute	janus_sdp_attribute
	SDP a= attribute representation.

typedef enum janus_sdp_oa_type	janus_sdp_oa_type

Enumerations
enum	janus_sdp_mtype { JANUS_SDP_AUDIO , JANUS_SDP_VIDEO , JANUS_SDP_APPLICATION , JANUS_SDP_OTHER }
	Helper enumeration to quickly identify m-line media types. More...

enum	janus_sdp_mdirection { JANUS_SDP_DEFAULT , JANUS_SDP_SENDRECV , JANUS_SDP_SENDONLY , JANUS_SDP_RECVONLY , JANUS_SDP_INACTIVE , JANUS_SDP_INVALID }
	Helper enumeration to quickly identify m-line directions. More...

enum	janus_sdp_oa_type { JANUS_SDP_OA_AUDIO = 1 , JANUS_SDP_OA_VIDEO , JANUS_SDP_OA_DATA , JANUS_SDP_OA_AUDIO_DIRECTION , JANUS_SDP_OA_VIDEO_DIRECTION , JANUS_SDP_OA_AUDIO_CODEC , JANUS_SDP_OA_VIDEO_CODEC , JANUS_SDP_OA_VP9_PROFILE , JANUS_SDP_OA_H264_PROFILE , JANUS_SDP_OA_AUDIO_PT , JANUS_SDP_OA_VIDEO_PT , JANUS_SDP_OA_AUDIO_DTMF , JANUS_SDP_OA_AUDIO_FMTP , JANUS_SDP_OA_VIDEO_FMTP , JANUS_SDP_OA_VIDEO_RTCPFB_DEFAULTS , JANUS_SDP_OA_DATA_LEGACY , JANUS_SDP_OA_AUDIO_EXTENSION , JANUS_SDP_OA_VIDEO_EXTENSION , JANUS_SDP_OA_ACCEPT_EXTMAP , JANUS_SDP_OA_OPUSRED_PT , JANUS_SDP_OA_ACCEPT_OPUSRED , JANUS_SDP_OA_DONE = 0 }

Functions
janus_sdp_mtype	janus_sdp_parse_mtype (const char *type)
	Helper method to get a janus_sdp_mtype from a string.

const char *	janus_sdp_mtype_str (janus_sdp_mtype type)
	Helper method to get the string associated to a janus_sdp_mtype value.

janus_sdp_mdirection	janus_sdp_parse_mdirection (const char *direction)
	Helper method to get a janus_sdp_mdirection from a string.

const char *	janus_sdp_mdirection_str (janus_sdp_mdirection direction)
	Helper method to get the string associated to a janus_sdp_mdirection value.

void	janus_sdp_find_preferred_codecs (janus_sdp sdp, const char acodec, const char *vcodec)
	Helper method to return the preferred audio and video codecs in an SDP offer or answer, (where by preferred we mean the codecs we prefer ourselves, and not the m-line SDP order) as long as the m-line direction is not disabled (port=0 or direction=inactive) in the SDP.

void	janus_sdp_find_first_codecs (janus_sdp sdp, const char acodec, const char *vcodec)
	Helper method to return the first audio and video codecs in an SDP offer or answer, (no matter whether we personally prefer them ourselves or not) as long as the m-line direction is not disabled (port=0 or direction=inactive) in the SDP.

const char *	janus_sdp_match_preferred_codec (janus_sdp_mtype type, char *codec)
	Helper method to match a codec to one of the preferred codecs.

janus_sdp_mline *	janus_sdp_mline_create (janus_sdp_mtype type, guint16 port, const char *proto, janus_sdp_mdirection direction)
	Helper method to quickly create a janus_sdp_mline instance.

void	janus_sdp_mline_destroy (janus_sdp_mline *mline)
	Helper method to free a janus_sdp_mline instance.

janus_sdp_mline *	janus_sdp_mline_find (janus_sdp *sdp, janus_sdp_mtype type)
	Helper method to get the janus_sdp_mline associated to a media type.

int	janus_sdp_mline_remove (janus_sdp *sdp, janus_sdp_mtype type)
	Helper method to remove the janus_sdp_mline associated to a media type from the SDP.

janus_sdp_attribute *	janus_sdp_attribute_create (const char name, const char value,...) G_GNUC_PRINTF(2
	Helper method to quickly create a janus_sdp_attribute instance.

janus_sdp_attribute void	janus_sdp_attribute_destroy (janus_sdp_attribute *attr)
	Helper method to free a janus_sdp_attribute instance.

int	janus_sdp_attribute_add_to_mline (janus_sdp_mline mline, janus_sdp_attribute attr)
	Helper method to add an attribute to a media line.

janus_sdp *	janus_sdp_parse (const char sdp, char error, size_t errlen)
	Method to parse an SDP string to a janus_sdp object.

int	janus_sdp_remove_payload_type (janus_sdp *sdp, int pt)
	Helper method to quickly remove all traces (m-line, rtpmap, fmtp, etc.) of a payload type.

char *	janus_sdp_write (janus_sdp *sdp)
	Method to serialize a janus_sdp object to an SDP string.

janus_sdp *	janus_sdp_new (const char name, const char address)
	Method to quickly generate a janus_sdp instance from a few selected fields.

void	janus_sdp_destroy (janus_sdp *sdp)
	Method to destroy a Janus SDP object.

janus_sdp *	janus_sdp_generate_offer (const char name, const char address,...)
	Method to generate a janus_sdp offer, using variable arguments to dictate what to negotiate (e.g., in terms of media to offer, directions, etc.). Variable arguments are in the form of a sequence of name-value terminated by a JANUS_SDP_OA_DONE, e.g.:

janus_sdp *	janus_sdp_generate_answer (janus_sdp *offer,...)
	Method to generate a janus_sdp answer to a provided janus_sdp offer, using variable arguments to dictate how to respond (e.g., in terms of media to accept, reject, directions, etc.). Variable arguments are in the form of a sequence of name-value terminated by a JANUS_SDP_OA_DONE, e.g.:

int	janus_sdp_get_codec_pt (janus_sdp sdp, const char codec)
	Helper to get the payload type associated to a specific codec.

int	janus_sdp_get_codec_pt_full (janus_sdp sdp, const char codec, const char *profile)
	Helper to get the payload type associated to a specific codec, taking into account a codec profile as a hint as well.

const char *	janus_sdp_get_codec_name (janus_sdp *sdp, int pt)
	Helper to get the codec name associated to a specific payload type.

const char *	janus_sdp_get_codec_rtpmap (const char *codec)
	Helper to get the rtpmap associated to a specific codec.

const char *	janus_sdp_get_fmtp (janus_sdp *sdp, int pt)
	Helper to get the fmtp associated to a specific payload type.

int	janus_sdp_get_opusred_pt (janus_sdp *sdp)
	Helper to get the opus/red payload type from an SDP, if present.

Detailed Description

SDP utilities (headers)

Author: Lorenzo Miniero loren.nosp@m.zo@m.nosp@m.eetec.nosp@m.ho.c.nosp@m.om

Copyright: GNU General Public License v3

Implementation of an internal SDP representation. Allows to parse SDP strings to an internal janus_sdp object, the manipulation of such object by playing with its properties, and a serialization to an SDP string that can be passed around. Since they don't have any core dependencies, these utilities can be used by plugins as well.

Core

Typedef Documentation

◆ janus_sdp

typedef struct janus_sdp janus_sdp

Janus SDP internal object representation.

◆ janus_sdp_attribute

typedef struct janus_sdp_attribute janus_sdp_attribute

SDP a= attribute representation.

◆ janus_sdp_mdirection

typedef enum janus_sdp_mdirection janus_sdp_mdirection

Helper enumeration to quickly identify m-line directions.

◆ janus_sdp_mline

typedef struct janus_sdp_mline janus_sdp_mline

SDP m-line representation.

◆ janus_sdp_mtype

typedef enum janus_sdp_mtype janus_sdp_mtype

Helper enumeration to quickly identify m-line media types.

◆ janus_sdp_oa_type

typedef enum janus_sdp_oa_type janus_sdp_oa_type

Enumeration Type Documentation

◆ janus_sdp_mdirection

enum janus_sdp_mdirection

Helper enumeration to quickly identify m-line directions.

Enumerator
JANUS_SDP_DEFAULT	default=sendrecv
JANUS_SDP_SENDRECV	sendrecv
JANUS_SDP_SENDONLY	sendonly
JANUS_SDP_RECVONLY	recvonly
JANUS_SDP_INACTIVE	inactive
JANUS_SDP_INVALID	invalid direction (when parsing)

◆ janus_sdp_mtype

enum janus_sdp_mtype

Helper enumeration to quickly identify m-line media types.

Enumerator
JANUS_SDP_AUDIO	m=audio
JANUS_SDP_VIDEO	m=video
JANUS_SDP_APPLICATION	m=application
JANUS_SDP_OTHER	m=whatever (we don't care, unsupported)

◆ janus_sdp_oa_type

enum janus_sdp_oa_type

Enumerator
JANUS_SDP_OA_AUDIO	When generating an offer or answer automatically, accept/reject audio if offered (depends on value that follows)
JANUS_SDP_OA_VIDEO	When generating an offer or answer automatically, accept/reject video if offered (depends on value that follows)
JANUS_SDP_OA_DATA	When generating an offer or answer automatically, accept/reject datachannels if offered (depends on value that follows)
JANUS_SDP_OA_AUDIO_DIRECTION	When generating an offer or answer automatically, use this direction for audio (depends on value that follows)
JANUS_SDP_OA_VIDEO_DIRECTION	When generating an offer or answer automatically, use this direction for video (depends on value that follows)
JANUS_SDP_OA_AUDIO_CODEC	When generating an offer or answer automatically, use this codec for audio (depends on value that follows)
JANUS_SDP_OA_VIDEO_CODEC	When generating an offer or answer automatically, use this codec for video (depends on value that follows)
JANUS_SDP_OA_VP9_PROFILE	When generating an offer or answer automatically, use this profile for VP9 (depends on value that follows)
JANUS_SDP_OA_H264_PROFILE	When generating an offer or answer automatically, use this profile for H.264 (depends on value that follows)
JANUS_SDP_OA_AUDIO_PT	When generating an offer (this is ignored for answers), use this payload type for audio (depends on value that follows)
JANUS_SDP_OA_VIDEO_PT	When generating an offer (this is ignored for answers), use this payload type for video (depends on value that follows)
JANUS_SDP_OA_AUDIO_DTMF	When generating an offer or answer automatically, do or do not negotiate telephone events (FIXME telephone-event/8000 only)
JANUS_SDP_OA_AUDIO_FMTP	When generating an offer or answer automatically, add this custom fmtp string for audio.
JANUS_SDP_OA_VIDEO_FMTP	When generating an offer or answer automatically, add this custom fmtp string for video. Note This property is ignored if JANUS_SDP_OA_VP9_PROFILE or JANUS_SDP_OA_H264_PROFILE is used on a compliant codec.
JANUS_SDP_OA_VIDEO_RTCPFB_DEFAULTS	When generating an offer or answer automatically, do or do not add the rtcpfb attributes we typically negotiate (fir, nack, pli, remb)
JANUS_SDP_OA_DATA_LEGACY	When generating an offer (this is ignored for answers), use the old "DTLS/SCTP" instead of the new "UDP/DTLS/SCTP (default=TRUE for now, depends on what follows)
JANUS_SDP_OA_AUDIO_EXTENSION	When generating an offer (this is ignored for answers), negotiate this audio extension: needs two arguments, extmap value and extension ID; can be used multiple times)
JANUS_SDP_OA_VIDEO_EXTENSION	When generating an offer (this is ignored for answers), negotiate this video extension: needs two arguments, extmap value and extension ID; can be used multiple times)
JANUS_SDP_OA_ACCEPT_EXTMAP	When generating an answer (this is ignored for offers), accept this extension (by default, we reject them all; can be used multiple times)
JANUS_SDP_OA_OPUSRED_PT	When generating an offer (this is ignored for answers), use this payload type for RED/Opus (depends on value that follows)
JANUS_SDP_OA_ACCEPT_OPUSRED	When generating an answer (this is ignored for offers), accept opus/red if offered.
JANUS_SDP_OA_DONE	MUST be used as the last argument in janus_sdp_generate_offer and janus_sdp_generate_answer.

Function Documentation

◆ janus_sdp_attribute_add_to_mline()

int janus_sdp_attribute_add_to_mline	(	janus_sdp_mline *	mline,
		janus_sdp_attribute *	attr )

Helper method to add an attribute to a media line.

Parameters

[in]	mline	The m-line to add the attribute to
[in]	attr	The attribute to add

Returns: 0 in case of success, -1 otherwise

◆ janus_sdp_attribute_create()

janus_sdp_attribute * janus_sdp_attribute_create	(	const char *	name,
		const char *	value,
			... )

Helper method to quickly create a janus_sdp_attribute instance.

Parameters

[in]	name	Name of the attribute
[in]	value	Value of the attribute, as a printf compliant string (variable arguments)

Returns: A pointer to a valid janus_sdp_attribute instance, if successful, NULL otherwise

◆ janus_sdp_attribute_destroy()

janus_sdp_attribute void janus_sdp_attribute_destroy ( janus_sdp_attribute * attr )

Helper method to free a janus_sdp_attribute instance.

Note: This method does not remove the attribute from the global or m-line attributes, that's up to the caller

Parameters

[in] attr The janus_sdp_attribute instance to free

◆ janus_sdp_destroy()

void janus_sdp_destroy ( janus_sdp * sdp )

Method to destroy a Janus SDP object.

Parameters

[in] sdp The Janus SDP object to free

◆ janus_sdp_find_first_codecs()

void janus_sdp_find_first_codecs	(	janus_sdp *	sdp,
		const char **	acodec,
		const char **	vcodec )

Helper method to return the first audio and video codecs in an SDP offer or answer, (no matter whether we personally prefer them ourselves or not) as long as the m-line direction is not disabled (port=0 or direction=inactive) in the SDP.

Note: The acodec and vcodec arguments are input/output, and they'll be set to a static value in janus_preferred_audio_codecs and janus_preferred_video_codecs, so don't free them.

Parameters

[in]	sdp	The Janus SDP object to parse
[out]	acodec	The audio codec that was found
[out]	vcodec	The video codec that was found

◆ janus_sdp_find_preferred_codecs()

void janus_sdp_find_preferred_codecs	(	janus_sdp *	sdp,
		const char **	acodec,
		const char **	vcodec )

Helper method to return the preferred audio and video codecs in an SDP offer or answer, (where by preferred we mean the codecs we prefer ourselves, and not the m-line SDP order) as long as the m-line direction is not disabled (port=0 or direction=inactive) in the SDP.

Note: The acodec and vcodec arguments are input/output, and they'll be set to a static value in janus_preferred_audio_codecs and janus_preferred_video_codecs, so don't free them.

Parameters

[in]	sdp	The Janus SDP object to parse
[out]	acodec	The audio codec that was found
[out]	vcodec	The video codec that was found

◆ janus_sdp_generate_answer()

janus_sdp * janus_sdp_generate_answer	(	janus_sdp *	offer,
			... )

Method to generate a janus_sdp answer to a provided janus_sdp offer, using variable arguments to dictate how to respond (e.g., in terms of media to accept, reject, directions, etc.). Variable arguments are in the form of a sequence of name-value terminated by a JANUS_SDP_OA_DONE, e.g.:

       janus_sdp *answer = janus_sdp_generate_answer(offer,
        JANUS_SDP_OA_AUDIO, TRUE,
        JANUS_SDP_OA_AUDIO_DIRECTION, JANUS_SDP_RECVONLY,
        JANUS_SDP_OA_AUDIO_CODEC, "opus",
        JANUS_SDP_OA_VIDEO, FALSE,
        JANUS_SDP_OA_DATA, FALSE,
        JANUS_SDP_OA_DONE);

to only accept the audio stream being offered, but as recvonly, use Opus and reject both video and datachannels. Refer to the property names in the header file for a complete list of how you can drive the answer. The default, if not specified, is to accept everything as sendrecv.

Parameters

[in] offer The Janus SDP offer to respond to

Returns: A pointer to a janus_sdp object, if successful, NULL otherwise

◆ janus_sdp_generate_offer()

janus_sdp * janus_sdp_generate_offer	(	const char *	name,
		const char *	address,
			... )

Method to generate a janus_sdp offer, using variable arguments to dictate what to negotiate (e.g., in terms of media to offer, directions, etc.). Variable arguments are in the form of a sequence of name-value terminated by a JANUS_SDP_OA_DONE, e.g.:

       janus_sdp *offer = janus_sdp_generate_offer("My session", "127.0.0.1",
        JANUS_SDP_OA_AUDIO, TRUE,
        JANUS_SDP_OA_AUDIO_PT, 100,
        JANUS_SDP_OA_AUDIO_DIRECTION, JANUS_SDP_SENDONLY,
        JANUS_SDP_OA_AUDIO_CODEC, "opus",
        JANUS_SDP_OA_VIDEO, FALSE,
        JANUS_SDP_OA_DATA, FALSE,
        JANUS_SDP_OA_DONE);

to only offer a sendonly Opus audio stream being offered with 100 as payload type, and avoid video and datachannels. Refer to the property names in the header file for a complete list of how you can drive the offer. The default, if not specified, is to offer everything, using Opus with pt=111 for audio, VP8 with pt=96 as video, and data channels, all as sendrecv.

Parameters

[in]	name	The session name (if NULL, a default value will be set)
[in]	address	The IP to set in o= and c= fields (if NULL, a default value will be set)

Returns: A pointer to a janus_sdp object, if successful, NULL otherwise

◆ janus_sdp_get_codec_name()

const char * janus_sdp_get_codec_name	(	janus_sdp *	sdp,
		int	pt )

Helper to get the codec name associated to a specific payload type.

Parameters

sdp	The Janus SDP instance to process
pt	The payload type to find

Returns: The codec name, if found, or NULL otherwise

◆ janus_sdp_get_codec_pt()

int janus_sdp_get_codec_pt	(	janus_sdp *	sdp,
		const char *	codec )

Helper to get the payload type associated to a specific codec.

Note: This version doesn't involve profiles, which means that in case of multiple payload types associated to the same codec because of different profiles (e.g., VP9 and H.264), this will simply return the first payload type associated with it the codec itself.

Parameters

sdp	The Janus SDP instance to process
codec	The codec to find, as a string

Returns: The payload type, if found, or -1 otherwise

◆ janus_sdp_get_codec_pt_full()

int janus_sdp_get_codec_pt_full	(	janus_sdp *	sdp,
		const char *	codec,
		const char *	profile )

Helper to get the payload type associated to a specific codec, taking into account a codec profile as a hint as well.

Note: The profile will only be used if the codec supports it, and the core is aware of it: right now, this is only VP9 and H.264. If the codec is there but the profile is not found, then no payload type is returned.

Parameters

sdp	The Janus SDP instance to process
codec	The codec to find, as a string
profile	The codec profile to use as a hint, as a string

Returns: The payload type, if found, or -1 otherwise

◆ janus_sdp_get_codec_rtpmap()

const char * janus_sdp_get_codec_rtpmap ( const char * codec )

Helper to get the rtpmap associated to a specific codec.

Parameters

codec The codec name, as a string (e.g., "opus")

Returns: The rtpmap value, if found (e.g., "opus/48000/2"), or -1 otherwise

◆ janus_sdp_get_fmtp()

const char * janus_sdp_get_fmtp	(	janus_sdp *	sdp,
		int	pt )

Helper to get the fmtp associated to a specific payload type.

Parameters

sdp	The Janus SDP instance to process
pt	The payload type to find

Returns: The fmtp content, if found, or NULL otherwise

◆ janus_sdp_get_opusred_pt()

int janus_sdp_get_opusred_pt ( janus_sdp * sdp )

Helper to get the opus/red payload type from an SDP, if present.

Parameters

sdp	The Janus SDP instance to process

Returns: The payload type, if found, or -1 otherwise

◆ janus_sdp_match_preferred_codec()

const char * janus_sdp_match_preferred_codec	(	janus_sdp_mtype	type,
		char *	codec )

Helper method to match a codec to one of the preferred codecs.

Note: Don't free the returned value, as it's a constant value

Parameters

[in]	type	The type of media to match
[in]	codec	The codec to match

Returns: The codec, if found, or NULL otherwise

◆ janus_sdp_mdirection_str()

const char * janus_sdp_mdirection_str ( janus_sdp_mdirection direction )

Helper method to get the string associated to a janus_sdp_mdirection value.

Parameters

[in] direction The direction to stringify

Returns: The direction as a string, if valid, or NULL otherwise

◆ janus_sdp_mline_create()

janus_sdp_mline * janus_sdp_mline_create	(	janus_sdp_mtype	type,
		guint16	port,
		const char *	proto,
		janus_sdp_mdirection	direction )

Helper method to quickly create a janus_sdp_mline instance.

Note: The type_str property of the new m-line is created automatically depending on the provided type attribute. If type is JANUS_SDP_OTHER, though, type_str will NOT we allocated, and will be up to the caller.

Parameters

[in]	type	Type of the media (audio/video/application) as a janus_sdp_mtype
[in]	port	Port to advertise
[in]	proto	Profile to advertise
[in]	direction	Direction of the media as a janus_sdp_direction

Returns: A pointer to a valid janus_sdp_mline instance, if successful, NULL otherwise

◆ janus_sdp_mline_destroy()

void janus_sdp_mline_destroy ( janus_sdp_mline * mline )

Helper method to free a janus_sdp_mline instance.

Note: This method does not remove the m-line from the janus_sdp instance, that's up to the caller

Parameters

[in] mline The janus_sdp_mline instance to free

◆ janus_sdp_mline_find()

janus_sdp_mline * janus_sdp_mline_find	(	janus_sdp *	sdp,
		janus_sdp_mtype	type )

Helper method to get the janus_sdp_mline associated to a media type.

Note: This currently returns the first m-line of the specified type it finds: in general, it shouldn't be an issue as we currently only support a single stream of the same type per session anyway... this will need to be fixed in the future.

Parameters

[in]	sdp	The Janus SDP object to search
[in]	type	The type of media to search

Returns: The janus_sdp_mline instance, if found, or NULL otherwise

◆ janus_sdp_mline_remove()

int janus_sdp_mline_remove	(	janus_sdp *	sdp,
		janus_sdp_mtype	type )

Helper method to remove the janus_sdp_mline associated to a media type from the SDP.

Note: This currently removes the first m-line of the specified type it finds: in general, it shouldn't be an issue as we currently only support a single stream of the same type per session anyway... this will need to be fixed in the future.

Parameters

[in]	sdp	The Janus SDP object to modify
[in]	type	The type of media to remove

Returns: 0 if successful, a negative integer otherwise

◆ janus_sdp_mtype_str()

const char * janus_sdp_mtype_str ( janus_sdp_mtype type )

Helper method to get the string associated to a janus_sdp_mtype value.

Parameters

[in] type The type to stringify

Returns: The type as a string, if valid, or NULL otherwise

◆ janus_sdp_new()

janus_sdp * janus_sdp_new	(	const char *	name,
		const char *	address )

Method to quickly generate a janus_sdp instance from a few selected fields.

Note: This allocates the o_addr, s_name and c_addr properties: if you want to replace them, don't forget to g_free the original pointers first.

Parameters

[in]	name	The session name (if NULL, a default value will be set)
[in]	address	The IP to set in o= and c= fields (if NULL, a default value will be set)

Returns: A pointer to a janus_sdp object, if successful, NULL otherwise

◆ janus_sdp_parse()

janus_sdp * janus_sdp_parse	(	const char *	sdp,
		char *	error,
		size_t	errlen )

Method to parse an SDP string to a janus_sdp object.

Parameters

[in]	sdp	The SDP string to parse
[in,out]	error	Buffer to receive a reason for an error, if any
[in]	errlen	The length of the error buffer

Returns: A pointer to a janus_sdp object, if successful, NULL otherwise; in case of errors, if provided the error string is filled with a reason

◆ janus_sdp_parse_mdirection()

janus_sdp_mdirection janus_sdp_parse_mdirection ( const char * direction )

Helper method to get a janus_sdp_mdirection from a string.

Parameters

[in] direction The direction to parse as a string (e.g., "sendrecv")

Returns: The corresponding janus_sdp_mdirection value

◆ janus_sdp_parse_mtype()

janus_sdp_mtype janus_sdp_parse_mtype ( const char * type )

Helper method to get a janus_sdp_mtype from a string.

Parameters

[in] type The type to parse as a string (e.g., "audio")

Returns: The corresponding janus_sdp_mtype value

◆ janus_sdp_remove_payload_type()

int janus_sdp_remove_payload_type	(	janus_sdp *	sdp,
		int	pt )

Helper method to quickly remove all traces (m-line, rtpmap, fmtp, etc.) of a payload type.

Parameters

[in]	sdp	The janus_sdp object to remove the payload type from
[in]	pt	The payload type to remove

Returns: 0 in case of success, a negative integer otherwise

◆ janus_sdp_write()

char * janus_sdp_write ( janus_sdp * sdp )

Method to serialize a janus_sdp object to an SDP string.

Parameters

[in] sdp The janus_sdp object to serialize

Returns: A pointer to a string with the serialized SDP, if successful, NULL otherwise

Data Structures

Typedefs

Enumerations

Functions

Detailed Description

Typedef Documentation

◆ janus_sdp

◆ janus_sdp_attribute

◆ janus_sdp_mdirection

◆ janus_sdp_mline

◆ janus_sdp_mtype

◆ janus_sdp_oa_type

Enumeration Type Documentation

◆ janus_sdp_mdirection

◆ janus_sdp_mtype

◆ janus_sdp_oa_type

Function Documentation

◆ janus_sdp_attribute_add_to_mline()

◆ janus_sdp_attribute_create()

◆ janus_sdp_attribute_destroy()

◆ janus_sdp_destroy()

◆ janus_sdp_find_first_codecs()

◆ janus_sdp_find_preferred_codecs()

◆ janus_sdp_generate_answer()

◆ janus_sdp_generate_offer()

◆ janus_sdp_get_codec_name()

◆ janus_sdp_get_codec_pt()

◆ janus_sdp_get_codec_pt_full()

◆ janus_sdp_get_codec_rtpmap()

◆ janus_sdp_get_fmtp()

◆ janus_sdp_get_opusred_pt()

◆ janus_sdp_match_preferred_codec()

◆ janus_sdp_mdirection_str()

◆ janus_sdp_mline_create()

◆ janus_sdp_mline_destroy()

◆ janus_sdp_mline_find()

◆ janus_sdp_mline_remove()

◆ janus_sdp_mtype_str()

◆ janus_sdp_new()

◆ janus_sdp_parse()

◆ janus_sdp_parse_mdirection()

◆ janus_sdp_parse_mtype()

◆ janus_sdp_remove_payload_type()

◆ janus_sdp_write()