The Media Render API provides functions to render audio or video stream received from the remote peer.

Required Header

#include <webrtc.h>

Overview

The WebRTC Media Render API allows you to:

set a sound policy including routing and volume to the audio stream received from the remote peer
set a display type and a surface to render the video stream received from the remote peer
choose not to render the audio or video stream itself but forward it via the callback function with media packet
enable loopback rendering of the media sources

Functions
int	webrtc_set_sound_stream_info (webrtc_h webrtc, unsigned int track_id, sound_stream_info_h stream_info)
	Sets a sound manager stream information to the audio track to be rendered.
int	webrtc_set_display (webrtc_h webrtc, unsigned int track_id, webrtc_display_type_e type, webrtc_display_h display)
	Sets a display to the video track to be rendered.
int	webrtc_set_display_mode (webrtc_h webrtc, unsigned int track_id, webrtc_display_mode_e mode)
	Sets the display mode of the video track.
int	webrtc_get_display_mode (webrtc_h webrtc, unsigned int track_id, webrtc_display_mode_e *mode)
	Gets the display mode of the video track.
int	webrtc_set_display_visible (webrtc_h webrtc, unsigned int track_id, bool visible)
	Sets the display visibleness of the video track.
int	webrtc_get_display_visible (webrtc_h webrtc, unsigned int track_id, bool *visible)
	Gets the display visibleness of the video track.
int	webrtc_set_encoded_audio_frame_cb (webrtc_h webrtc, webrtc_encoded_frame_cb callback, void *user_data)
	Sets an encoded audio frame callback function to be invoked when each audio frame is ready to be rendered.
int	webrtc_unset_encoded_audio_frame_cb (webrtc_h webrtc)
	Unsets the encoded audio frame callback function.
int	webrtc_set_encoded_video_frame_cb (webrtc_h webrtc, webrtc_encoded_frame_cb callback, void *user_data)
	Sets an encoded video frame callback function to be invoked when each video frame is ready to be rendered.
int	webrtc_unset_encoded_video_frame_cb (webrtc_h webrtc)
	Unsets the encoded video frame callback function.
int	webrtc_media_source_set_audio_loopback (webrtc_h webrtc, unsigned int source_id, sound_stream_info_h stream_info, unsigned int *track_id)
	Sets an audio loopback to render the audio frames of the media source.
int	webrtc_media_source_unset_audio_loopback (webrtc_h webrtc, unsigned int source_id)
	Unsets the audio loopback.
int	webrtc_media_source_set_video_loopback (webrtc_h webrtc, unsigned int source_id, webrtc_display_type_e type, webrtc_display_h display, unsigned int *track_id)
	Sets a video loopback to render the video frames of the media source.
int	webrtc_media_source_unset_video_loopback (webrtc_h webrtc, unsigned int source_id)
	Unsets the video loopback.
Typedefs
typedef void *	webrtc_display_h
	WebRTC display handle type.
typedef void(*	webrtc_encoded_frame_cb )(webrtc_h webrtc, webrtc_media_type_e type, unsigned int track_id, media_packet_h packet, void *user_data)
	Called when each audio or video frame is ready to be rendered via the WebRTC pipeline after the negotiation.

Typedef Documentation

typedef void* webrtc_display_h

WebRTC display handle type.

Since :: 6.5

Remarks:: The pointer of this handle can be obtained from EFL UI API.
For example, in case of WEBRTC_DISPLAY_TYPE_OVERLAY, elm_win_add() can be used to get the window handle.
In case of WEBRTC_DISPLAY_TYPE_EVAS, evas_object_image_add() can be used to get the renderable image handle.
For more details, please refer to https://docs.tizen.org/application/native/guides/ui/efl/.

typedef void(* webrtc_encoded_frame_cb)(webrtc_h webrtc, webrtc_media_type_e type, unsigned int track_id, media_packet_h packet, void *user_data)

Called when each audio or video frame is ready to be rendered via the WebRTC pipeline after the negotiation.

Since :: 6.5

Remarks:: The webrtc is the same object for which the callback was set.
The webrtc should not be released.
Use media_packet_get_buffer_data_ptr() with packet to get the Gstreamer buffer pointer.
The packet should be released using media_packet_destroy().

Parameters:

[in]	webrtc	WebRTC handle
[in]	type	The media type
[in]	track_id	The track id
[in]	packet	The media packet which has a frame data
[in]	user_data	The user data passed from the callback registration function

See also:: webrtc_set_encoded_audio_frame_cb(); webrtc_unset_encoded_audio_frame_cb(); webrtc_set_encoded_video_frame_cb(); webrtc_unset_encoded_video_frame_cb(); media_packet_get_buffer_data_ptr()

Enumeration Type Documentation

enum webrtc_display_mode_e

Enumeration for WebRTC display mode.

Since :: 6.5

Enumerator:

WEBRTC_DISPLAY_MODE_LETTER_BOX	Letter box
WEBRTC_DISPLAY_MODE_ORIGIN_SIZE	Origin size
WEBRTC_DISPLAY_MODE_FULL	Full screen

enum webrtc_display_type_e

Enumeration for WebRTC display type.

Since :: 6.5

Enumerator:

WEBRTC_DISPLAY_TYPE_OVERLAY	Overlay
WEBRTC_DISPLAY_TYPE_EVAS	Evas image object

Function Documentation

int webrtc_get_display_mode	(	webrtc_h	webrtc,
		unsigned int	track_id,
		webrtc_display_mode_e *	mode
	)

Gets the display mode of the video track.

Since :: 6.5

Remarks:: The default value is WEBRTC_DISPLAY_MODE_LETTER_BOX.

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[out]	mode	The display mode

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: For remote video track, webrtc_set_display() must be called with track_id from webrtc_track_added_cb().
For loopback video track, webrtc_media_source_set_video_loopback() must be called to get track_id.

See also:: webrtc_set_display_mode()

int webrtc_get_display_visible	(	webrtc_h	webrtc,
		unsigned int	track_id,
		bool *	visible
	)

Gets the display visibleness of the video track.

Since :: 6.5

Remarks:: The default value is true.

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[out]	visible	The display visibleness

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: For remote video track, webrtc_set_display() must be called with track_id from webrtc_track_added_cb().
For loopback video track, webrtc_media_source_set_video_loopback() must be called to get track_id.

See also:: webrtc_set_display_visible()

int webrtc_media_source_set_audio_loopback	(	webrtc_h	webrtc,
		unsigned int	source_id,
		sound_stream_info_h	stream_info,
		unsigned int *	track_id
	)

Sets an audio loopback to render the audio frames of the media source.

The following media source types are available for this function:
WEBRTC_MEDIA_SOURCE_TYPE_AUDIOTEST
WEBRTC_MEDIA_SOURCE_TYPE_MIC
WEBRTC_MEDIA_SOURCE_TYPE_FILE

Since :: 6.5

Remarks:: The following sound stream types can be used to create the stream_info :
SOUND_STREAM_TYPE_MEDIA
SOUND_STREAM_TYPE_VOIP
SOUND_STREAM_TYPE_MEDIA_EXTERNAL_ONLY
For more details, please refer to Sound Manager.

Parameters:

[in]	webrtc	WebRTC handle
[in]	source_id	The audio source id
[in]	stream_info	The sound stream information
[out]	track_id	The track id (optional, this can be NULL)

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: Add media source to webrtc to get source_id by calling webrtc_add_media_source().

See also:: webrtc_media_source_set_video_loopback()

int webrtc_media_source_set_video_loopback	(	webrtc_h	webrtc,
		unsigned int	source_id,
		webrtc_display_type_e	type,
		webrtc_display_h	display,
		unsigned int *	track_id
	)

Sets a video loopback to render the video frames of the media source.

The following media source types are available for this function:
WEBRTC_MEDIA_SOURCE_TYPE_VIDEOTEST
WEBRTC_MEDIA_SOURCE_TYPE_CAMERA
WEBRTC_MEDIA_SOURCE_TYPE_SCREEN
WEBRTC_MEDIA_SOURCE_TYPE_FILE

Since :: 6.5

Parameters:

[in]	webrtc	WebRTC handle
[in]	source_id	The video source id
[in]	type	The display type
[in]	display	The display handle
[out]	track_id	The track id (optional, this can be NULL)

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: Add media source to webrtc to get source_id by calling webrtc_add_media_source().

See also:: webrtc_media_source_set_audio_loopback(); webrtc_set_display_mode(); webrtc_get_display_mode(); webrtc_set_display_visible(); webrtc_get_display_visible()

int webrtc_media_source_unset_audio_loopback	(	webrtc_h	webrtc,
		unsigned int	source_id
	)

Unsets the audio loopback.

Since :: 7.0

Parameters:

[in]	webrtc	WebRTC handle
[in]	source_id	The audio source id

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: Add media source to webrtc to get source_id by calling webrtc_add_media_source().

See also:: webrtc_media_source_set_audio_loopback()

int webrtc_media_source_unset_video_loopback	(	webrtc_h	webrtc,
		unsigned int	source_id
	)

Unsets the video loopback.

Since :: 7.0

Parameters:

[in]	webrtc	WebRTC handle
[in]	source_id	The video source id

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: Add media source to webrtc to get source_id by calling webrtc_add_media_source().

See also:: webrtc_media_source_set_video_loopback()

int webrtc_set_display	(	webrtc_h	webrtc,
		unsigned int	track_id,
		webrtc_display_type_e	type,
		webrtc_display_h	display
	)

Sets a display to the video track to be rendered.

Since :: 6.5

Remarks:: Call this function within webrtc_track_added_cb(), otherwise WEBRTC_ERROR_INVALID_OPERATION will be returned.
If webrtc_set_encoded_video_frame_cb() has been called, it will return WEBRTC_ERROR_INVALID_OPERATION.

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[in]	type	The display type
[in]	display	The display handle

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: webrtc_track_added_cb() must be set by calling webrtc_set_track_added_cb().

See also:: webrtc_set_track_added_cb(); webrtc_unset_track_added_cb(); webrtc_set_display_mode(); webrtc_get_display_mode(); webrtc_set_display_visible(); webrtc_get_display_visible()

int webrtc_set_display_mode	(	webrtc_h	webrtc,
		unsigned int	track_id,
		webrtc_display_mode_e	mode
	)

Sets the display mode of the video track.

Since :: 6.5

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[in]	mode	The display mode

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: For remote video track, webrtc_set_display() must be called with track_id from webrtc_track_added_cb().
For loopback video track, webrtc_media_source_set_video_loopback() must be called to get track_id.

See also:: webrtc_get_display_mode()

int webrtc_set_display_visible	(	webrtc_h	webrtc,
		unsigned int	track_id,
		bool	visible
	)

Sets the display visibleness of the video track.

Since :: 6.5

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[in]	visible	The display visibleness

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: For remote video track, webrtc_set_display() must be called with track_id from webrtc_track_added_cb().
For loopback video track, webrtc_media_source_set_video_loopback() must be called to get track_id.

See also:: webrtc_get_display_visible()

int webrtc_set_encoded_audio_frame_cb	(	webrtc_h	webrtc,
		webrtc_encoded_frame_cb	callback,
		void *	user_data
	)

Sets an encoded audio frame callback function to be invoked when each audio frame is ready to be rendered.

Since :: 6.5

Remarks:: If callback is set, audio data from the remote peer will be forwarded to callback without being rendered by itself.
The registered callback will be invoked in an internal thread of the webrtc.

Parameters:

[in]	webrtc	WebRTC handle
[in]	callback	Callback function pointer
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_STATE	Invalid state

Precondition:: webrtc state must be set to WEBRTC_STATE_IDLE or WEBRTC_STATE_NEGOTIATING.

Postcondition:: webrtc_encoded_frame_cb() will be invoked.

See also:: webrtc_unset_encoded_audio_frame_cb(); webrtc_encoded_frame_cb()

int webrtc_set_encoded_video_frame_cb	(	webrtc_h	webrtc,
		webrtc_encoded_frame_cb	callback,
		void *	user_data
	)

Sets an encoded video frame callback function to be invoked when each video frame is ready to be rendered.

Since :: 6.5

Remarks:: If callback is set, video data from the remote peer will be forwarded to callback without being rendered by itself.
The registered callback will be invoked in an internal thread of the webrtc.

Parameters:

[in]	webrtc	WebRTC handle
[in]	callback	Callback function pointer
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_STATE	Invalid state

Precondition:: webrtc state must be set to WEBRTC_STATE_IDLE or WEBRTC_STATE_NEGOTIATING.

Postcondition:: webrtc_encoded_frame_cb() will be invoked.

See also:: webrtc_unset_encoded_video_frame_cb(); webrtc_encoded_frame_cb()

int webrtc_set_sound_stream_info	(	webrtc_h	webrtc,
		unsigned int	track_id,
		sound_stream_info_h	stream_info
	)

Sets a sound manager stream information to the audio track to be rendered.

Since :: 6.5

Remarks:: Call this function within webrtc_track_added_cb(), otherwise WEBRTC_ERROR_INVALID_OPERATION will be returned.
If webrtc_set_encoded_audio_frame_cb() has been called, it will return WEBRTC_ERROR_INVALID_OPERATION.
The following sound stream types can be used to create the stream_info :
SOUND_STREAM_TYPE_MEDIA
SOUND_STREAM_TYPE_VOIP
SOUND_STREAM_TYPE_MEDIA_EXTERNAL_ONLY
For more details, please refer to Sound Manager.

Parameters:

[in]	webrtc	WebRTC handle
[in]	track_id	The track id
[in]	stream_info	The sound stream information

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: webrtc_track_added_cb() must be set by calling webrtc_set_track_added_cb().

See also:: webrtc_set_track_added_cb(); webrtc_unset_track_added_cb()

int webrtc_unset_encoded_audio_frame_cb ( webrtc_h webrtc )

Unsets the encoded audio frame callback function.

Since :: 6.5

Parameters:

[in] webrtc WebRTC handle

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation
WEBRTC_ERROR_INVALID_STATE	Invalid state

Precondition:: webrtc state must be set to WEBRTC_STATE_IDLE or WEBRTC_STATE_NEGOTIATING.

See also:: webrtc_set_encoded_audio_frame_cb()

int webrtc_unset_encoded_video_frame_cb ( webrtc_h webrtc )

Unsets the encoded video frame callback function.

Since :: 6.5

Parameters:

[in] webrtc WebRTC handle

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_OPERATION	Invalid operation
WEBRTC_ERROR_INVALID_STATE	Invalid state

Precondition:: webrtc state must be set to WEBRTC_STATE_IDLE or WEBRTC_STATE_NEGOTIATING.

See also:: webrtc_set_encoded_video_frame_cb()

Required Header

Overview

Functions

Typedefs

Typedef Documentation

Enumeration Type Documentation

Function Documentation