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gstreamer/subprojects/gst-rtsp-server/gst/rtsp-server/rtsp-media-factory.h
Jacob Johnsson eb0272e210 rtsp-server: Add new ensure-keyunit-on-start property 
While the suspend modes NONE and PAUSED provided a low startup latency
for connecting clients they did not ensure that streams started on
fresh data.

With this property we can maintain the low startup latency of those
suspend modes while also ensuring that a stream starts on a key unit.
Furthermore, by modifying the value of a new property,
ensure-keyunit-on-start-timeout, it is possible to accept a keyunit of
a certain age but discard it if too much time has passed and instead
force a new keyunit.

Fixes #2443

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4334>
2023-10-02 16:22:33 +00:00

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/* GStreamer
* Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <gst/gst.h>
#include <gst/rtsp/gstrtspurl.h>
#include "rtsp-media.h"
#include "rtsp-permissions.h"
#include "rtsp-address-pool.h"
#ifndef __GST_RTSP_MEDIA_FACTORY_H__
#define __GST_RTSP_MEDIA_FACTORY_H__
G_BEGIN_DECLS
/* types for the media factory */
#define GST_TYPE_RTSP_MEDIA_FACTORY (gst_rtsp_media_factory_get_type ())
#define GST_IS_RTSP_MEDIA_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_RTSP_MEDIA_FACTORY))
#define GST_IS_RTSP_MEDIA_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_RTSP_MEDIA_FACTORY))
#define GST_RTSP_MEDIA_FACTORY_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_RTSP_MEDIA_FACTORY, GstRTSPMediaFactoryClass))
#define GST_RTSP_MEDIA_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_RTSP_MEDIA_FACTORY, GstRTSPMediaFactory))
#define GST_RTSP_MEDIA_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_RTSP_MEDIA_FACTORY, GstRTSPMediaFactoryClass))
#define GST_RTSP_MEDIA_FACTORY_CAST(obj) ((GstRTSPMediaFactory*)(obj))
#define GST_RTSP_MEDIA_FACTORY_CLASS_CAST(klass) ((GstRTSPMediaFactoryClass*)(klass))
typedef struct _GstRTSPMediaFactory GstRTSPMediaFactory;
typedef struct _GstRTSPMediaFactoryClass GstRTSPMediaFactoryClass;
typedef struct _GstRTSPMediaFactoryPrivate GstRTSPMediaFactoryPrivate;
/**
* GstRTSPMediaFactory:
*
* The definition and logic for constructing the pipeline for a media. The media
* can contain multiple streams like audio and video.
*/
struct _GstRTSPMediaFactory {
GObject parent;
/*< private >*/
GstRTSPMediaFactoryPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
/**
* GstRTSPMediaFactoryClass:
* @gen_key: convert @url to a key for caching shared #GstRTSPMedia objects.
* The default implementation of this function will use the complete URL
* including the query parameters to return a key.
* @create_element: Construct and return a #GstElement that is a #GstBin containing
* the elements to use for streaming the media. The bin should contain
* payloaders pay\%d for each stream. The default implementation of this
* function returns the bin created from the launch parameter.
* @construct: the vmethod that will be called when the factory has to create the
* #GstRTSPMedia for @url. The default implementation of this
* function calls create_element to retrieve an element and then looks for
* pay\%d to create the streams.
* @create_pipeline: create a new pipeline or re-use an existing one and
* add the #GstRTSPMedia's element created by @construct to the pipeline.
* @configure: configure the media created with @construct. The default
* implementation will configure the 'shared' property of the media.
* @media_constructed: signal emitted when a media was constructed
* @media_configure: signal emitted when a media should be configured
*
* The #GstRTSPMediaFactory class structure.
*/
struct _GstRTSPMediaFactoryClass {
GObjectClass parent_class;
gchar * (*gen_key) (GstRTSPMediaFactory *factory, const GstRTSPUrl *url);
GstElement * (*create_element) (GstRTSPMediaFactory *factory, const GstRTSPUrl *url);
GstRTSPMedia * (*construct) (GstRTSPMediaFactory *factory, const GstRTSPUrl *url);
GstElement * (*create_pipeline) (GstRTSPMediaFactory *factory, GstRTSPMedia *media);
void (*configure) (GstRTSPMediaFactory *factory, GstRTSPMedia *media);
/* signals */
void (*media_constructed) (GstRTSPMediaFactory *factory, GstRTSPMedia *media);
void (*media_configure) (GstRTSPMediaFactory *factory, GstRTSPMedia *media);
/*< private >*/
gpointer _gst_reserved[GST_PADDING_LARGE];
};
GST_RTSP_SERVER_API
GType gst_rtsp_media_factory_get_type (void);
/* creating the factory */
GST_RTSP_SERVER_API
GstRTSPMediaFactory * gst_rtsp_media_factory_new (void);
/* configuring the factory */
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_launch (GstRTSPMediaFactory *factory,
const gchar *launch);
GST_RTSP_SERVER_API
gchar * gst_rtsp_media_factory_get_launch (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_permissions (GstRTSPMediaFactory *factory,
GstRTSPPermissions *permissions);
GST_RTSP_SERVER_API
GstRTSPPermissions * gst_rtsp_media_factory_get_permissions (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_add_role (GstRTSPMediaFactory *factory,
const gchar *role,
const gchar *fieldname, ...);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_add_role_from_structure (GstRTSPMediaFactory * factory,
GstStructure *structure);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_shared (GstRTSPMediaFactory *factory,
gboolean shared);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_is_shared (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_stop_on_disconnect (GstRTSPMediaFactory *factory,
gboolean stop_on_disconnect);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_is_stop_on_disonnect (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_suspend_mode (GstRTSPMediaFactory *factory,
GstRTSPSuspendMode mode);
GST_RTSP_SERVER_API
GstRTSPSuspendMode gst_rtsp_media_factory_get_suspend_mode (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_eos_shutdown (GstRTSPMediaFactory *factory,
gboolean eos_shutdown);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_is_eos_shutdown (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_profiles (GstRTSPMediaFactory *factory,
GstRTSPProfile profiles);
GST_RTSP_SERVER_API
GstRTSPProfile gst_rtsp_media_factory_get_profiles (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_protocols (GstRTSPMediaFactory *factory,
GstRTSPLowerTrans protocols);
GST_RTSP_SERVER_API
GstRTSPLowerTrans gst_rtsp_media_factory_get_protocols (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_address_pool (GstRTSPMediaFactory * factory,
GstRTSPAddressPool * pool);
GST_RTSP_SERVER_API
GstRTSPAddressPool * gst_rtsp_media_factory_get_address_pool (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_multicast_iface (GstRTSPMediaFactory *factory, const gchar *multicast_iface);
GST_RTSP_SERVER_API
gchar * gst_rtsp_media_factory_get_multicast_iface (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_buffer_size (GstRTSPMediaFactory * factory,
guint size);
GST_RTSP_SERVER_API
guint gst_rtsp_media_factory_get_buffer_size (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_ensure_keyunit_on_start (GstRTSPMediaFactory * factory,
gboolean ensure_keyunit_on_start);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_get_ensure_keyunit_on_start (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_ensure_keyunit_on_start_timeout (GstRTSPMediaFactory * factory,
guint timeout);
GST_RTSP_SERVER_API
guint gst_rtsp_media_factory_get_ensure_keyunit_on_start_timeout (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_retransmission_time (GstRTSPMediaFactory * factory,
GstClockTime time);
GST_RTSP_SERVER_API
GstClockTime gst_rtsp_media_factory_get_retransmission_time (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_do_retransmission (GstRTSPMediaFactory * factory,
gboolean do_retransmission);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_get_do_retransmission (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_latency (GstRTSPMediaFactory * factory,
guint latency);
GST_RTSP_SERVER_API
guint gst_rtsp_media_factory_get_latency (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_transport_mode (GstRTSPMediaFactory *factory,
GstRTSPTransportMode mode);
GST_RTSP_SERVER_API
GstRTSPTransportMode gst_rtsp_media_factory_get_transport_mode (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_media_gtype (GstRTSPMediaFactory * factory,
GType media_gtype);
GST_RTSP_SERVER_API
GType gst_rtsp_media_factory_get_media_gtype (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_clock (GstRTSPMediaFactory *factory,
GstClock * clock);
GST_RTSP_SERVER_API
GstClock * gst_rtsp_media_factory_get_clock (GstRTSPMediaFactory *factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_publish_clock_mode (GstRTSPMediaFactory * factory, GstRTSPPublishClockMode mode);
GST_RTSP_SERVER_API
GstRTSPPublishClockMode gst_rtsp_media_factory_get_publish_clock_mode (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_set_max_mcast_ttl (GstRTSPMediaFactory * factory,
guint ttl);
GST_RTSP_SERVER_API
guint gst_rtsp_media_factory_get_max_mcast_ttl (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_bind_mcast_address (GstRTSPMediaFactory * factory,
gboolean bind_mcast_addr);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_is_bind_mcast_address (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_dscp_qos (GstRTSPMediaFactory * factory,
gint dscp_qos);
GST_RTSP_SERVER_API
gint gst_rtsp_media_factory_get_dscp_qos (GstRTSPMediaFactory * factory);
GST_RTSP_SERVER_API
void gst_rtsp_media_factory_set_enable_rtcp (GstRTSPMediaFactory * factory,
gboolean enable);
GST_RTSP_SERVER_API
gboolean gst_rtsp_media_factory_is_enable_rtcp (GstRTSPMediaFactory * factory);
/* creating the media from the factory and a url */
GST_RTSP_SERVER_API
GstRTSPMedia * gst_rtsp_media_factory_construct (GstRTSPMediaFactory *factory,
const GstRTSPUrl *url);
GST_RTSP_SERVER_API
GstElement * gst_rtsp_media_factory_create_element (GstRTSPMediaFactory *factory,
const GstRTSPUrl *url);
#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstRTSPMediaFactory, gst_object_unref)
#endif
G_END_DECLS
#endif /* __GST_RTSP_MEDIA_FACTORY_H__ */
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