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media-gst.h
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media-gst.h
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/**
* @file media-gst.h Media API
* @ingroup core
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef _PURPLE_MEDIA_GST_H_
#define _PURPLE_MEDIA_GST_H_
#include "media.h"
#include "mediamanager.h"
#include <gst/gst.h>
G_BEGIN_DECLS
#define PURPLE_TYPE_MEDIA_ELEMENT_TYPE (purple_media_element_type_get_type())
#define PURPLE_TYPE_MEDIA_ELEMENT_INFO (purple_media_element_info_get_type())
#define PURPLE_MEDIA_ELEMENT_INFO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), PURPLE_TYPE_MEDIA_ELEMENT_INFO, PurpleMediaElementInfo))
#define PURPLE_MEDIA_ELEMENT_INFO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), PURPLE_TYPE_MEDIA_ELEMENT_INFO, PurpleMediaElementInfo))
#define PURPLE_IS_MEDIA_ELEMENT_INFO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), PURPLE_TYPE_MEDIA_ELEMENT_INFO))
#define PURPLE_IS_MEDIA_ELEMENT_INFO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), PURPLE_TYPE_MEDIA_ELEMENT_INFO))
#define PURPLE_MEDIA_ELEMENT_INFO_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), PURPLE_TYPE_MEDIA_ELEMENT_INFO, PurpleMediaElementInfo))
/** An opaque structure representing an audio/video source/sink. */
typedef struct _PurpleMediaElementInfo PurpleMediaElementInfo;
typedef struct _PurpleMediaElementInfoClass PurpleMediaElementInfoClass;
typedef GstElement *(*PurpleMediaElementCreateCallback)(PurpleMedia *media,
const gchar *session_id, const gchar *participant);
typedef enum {
PURPLE_MEDIA_ELEMENT_NONE = 0, /** empty element */
PURPLE_MEDIA_ELEMENT_AUDIO = 1, /** supports audio */
PURPLE_MEDIA_ELEMENT_VIDEO = 1 << 1, /** supports video */
PURPLE_MEDIA_ELEMENT_AUDIO_VIDEO = PURPLE_MEDIA_ELEMENT_AUDIO
| PURPLE_MEDIA_ELEMENT_VIDEO, /** supports audio and video */
PURPLE_MEDIA_ELEMENT_NO_SRCS = 0, /** has no src pads */
PURPLE_MEDIA_ELEMENT_ONE_SRC = 1 << 2, /** has one src pad */
PURPLE_MEDIA_ELEMENT_MULTI_SRC = 1 << 3, /** has multiple src pads */
PURPLE_MEDIA_ELEMENT_REQUEST_SRC = 1 << 4, /** src pads must be requested */
PURPLE_MEDIA_ELEMENT_NO_SINKS = 0, /** has no sink pads */
PURPLE_MEDIA_ELEMENT_ONE_SINK = 1 << 5, /** has one sink pad */
PURPLE_MEDIA_ELEMENT_MULTI_SINK = 1 << 6, /** has multiple sink pads */
PURPLE_MEDIA_ELEMENT_REQUEST_SINK = 1 << 7, /** sink pads must be requested */
PURPLE_MEDIA_ELEMENT_UNIQUE = 1 << 8, /** This element is unique and
only one instance of it should
be created at a time */
PURPLE_MEDIA_ELEMENT_SRC = 1 << 9, /** can be set as an active src */
PURPLE_MEDIA_ELEMENT_SINK = 1 << 10, /** can be set as an active sink */
} PurpleMediaElementType;
#ifdef __cplusplus
extern "C" {
#endif
/**
* Gets the element type's GType.
*
* @return The element type's GType.
*
* @since 2.6.0
*/
GType purple_media_element_type_get_type(void);
/**
* Gets the element info's GType.
*
* @return The element info's GType.
*
* @since 2.6.0
*/
GType purple_media_element_info_get_type(void);
/**
* Gets the source from a session
*
* @param media The media object the session is in.
* @param sess_id The session id of the session to get the source from.
*
* @return The source retrieved.
*
* @since 2.6.0
*/
GstElement *purple_media_get_src(PurpleMedia *media, const gchar *sess_id);
/**
* Gets the tee from a given session/stream.
*
* @param media The instance to get the tee from.
* @param session_id The id of the session to get the tee from.
* @param participant Optionally, the participant of the stream to get the tee from.
*
* @return The GstTee element from the chosen session/stream.
*
* @since 2.6.0
*/
GstElement *purple_media_get_tee(PurpleMedia *media,
const gchar *session_id, const gchar *participant);
/**
* Gets the pipeline from the media manager.
*
* @param manager The media manager to get the pipeline from.
*
* @return The pipeline.
*
* @since 2.6.0
*/
GstElement *purple_media_manager_get_pipeline(PurpleMediaManager *manager);
/**
* Returns a GStreamer source or sink for audio or video.
*
* @param manager The media manager to use to obtain the source/sink.
* @param type The type of source/sink to get.
* @param media The media call this element is requested for.
* @param session_id The id of the session this element is requested for or NULL.
* @param participant The remote user this element is requested for or NULL.
*
* @since 2.6.0
*/
GstElement *purple_media_manager_get_element(PurpleMediaManager *manager,
PurpleMediaSessionType type, PurpleMedia *media,
const gchar *session_id, const gchar *participant);
PurpleMediaElementInfo *purple_media_manager_get_element_info(
PurpleMediaManager *manager, const gchar *name);
gboolean purple_media_manager_register_element(PurpleMediaManager *manager,
PurpleMediaElementInfo *info);
gboolean purple_media_manager_unregister_element(PurpleMediaManager *manager,
const gchar *name);
gboolean purple_media_manager_set_active_element(PurpleMediaManager *manager,
PurpleMediaElementInfo *info);
PurpleMediaElementInfo *purple_media_manager_get_active_element(
PurpleMediaManager *manager, PurpleMediaElementType type);
/**
* Reduces media formats supported by the video source to given set.
*
* Useful to force negotiation of smaller picture resolution more suitable for
* use with particular codec and communication protocol without rescaling.
*
* @param manager The media manager to set the media formats.
* @param caps Set of allowed media formats.
*
* @since 2.8.0
*/
void purple_media_manager_set_video_caps(PurpleMediaManager *manager,
GstCaps *caps);
/**
* Returns current set of media formats limiting the output from video source.
*
* @param manager The media manager to get the media formats from.
*
* @return @c GstCaps limiting the video source's formats.
*
* @since 2.8.0
*/
GstCaps *purple_media_manager_get_video_caps(PurpleMediaManager *manager);
gchar *purple_media_element_info_get_id(PurpleMediaElementInfo *info);
gchar *purple_media_element_info_get_name(PurpleMediaElementInfo *info);
PurpleMediaElementType purple_media_element_info_get_element_type(
PurpleMediaElementInfo *info);
GstElement *purple_media_element_info_call_create(
PurpleMediaElementInfo *info, PurpleMedia *media,
const gchar *session_id, const gchar *participant);
#ifdef __cplusplus
}
#endif
G_END_DECLS
#endif /* _PURPLE_MEDIA_GST_H_ */