gstreamer/gst/rtsp-server/rtsp-media-factory.c

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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
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
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/**
* SECTION:rtsp-media-factory
* @short_description: A factory for media pipelines
* @see_also: #GstRTSPMountPoints, #GstRTSPMedia
*
* The #GstRTSPMediaFactory is responsible for creating or recycling
* #GstRTSPMedia objects based on the passed URL.
*
* The default implementation of the object can create #GstRTSPMedia objects
* containing a pipeline created from a launch description set with
* gst_rtsp_media_factory_set_launch().
*
* Media from a factory can be shared by setting the shared flag with
* gst_rtsp_media_factory_set_shared(). When a factory is shared,
* gst_rtsp_media_factory_construct() will return the same #GstRTSPMedia when
* the url matches.
*
* Last reviewed on 2013-07-11 (1.0.0)
*/
#include "rtsp-media-factory.h"
#define GST_RTSP_MEDIA_FACTORY_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_RTSP_MEDIA_FACTORY, GstRTSPMediaFactoryPrivate))
#define GST_RTSP_MEDIA_FACTORY_GET_LOCK(f) (&(GST_RTSP_MEDIA_FACTORY_CAST(f)->priv->lock))
#define GST_RTSP_MEDIA_FACTORY_LOCK(f) (g_mutex_lock(GST_RTSP_MEDIA_FACTORY_GET_LOCK(f)))
#define GST_RTSP_MEDIA_FACTORY_UNLOCK(f) (g_mutex_unlock(GST_RTSP_MEDIA_FACTORY_GET_LOCK(f)))
struct _GstRTSPMediaFactoryPrivate
{
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GMutex lock; /* protects everything but medias */
GstRTSPPermissions *permissions;
gchar *launch;
gboolean shared;
gboolean eos_shutdown;
GstRTSPLowerTrans protocols;
guint buffer_size;
GstRTSPAddressPool *pool;
GMutex medias_lock;
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GHashTable *medias; /* protected by medias_lock */
};
#define DEFAULT_LAUNCH NULL
#define DEFAULT_SHARED FALSE
#define DEFAULT_EOS_SHUTDOWN FALSE
#define DEFAULT_PROTOCOLS GST_RTSP_LOWER_TRANS_UDP | GST_RTSP_LOWER_TRANS_TCP
#define DEFAULT_BUFFER_SIZE 0x80000
enum
{
PROP_0,
PROP_LAUNCH,
PROP_SHARED,
PROP_EOS_SHUTDOWN,
PROP_PROTOCOLS,
PROP_BUFFER_SIZE,
PROP_LAST
};
enum
{
SIGNAL_MEDIA_CONSTRUCTED,
SIGNAL_MEDIA_CONFIGURE,
SIGNAL_LAST
};
GST_DEBUG_CATEGORY_STATIC (rtsp_media_debug);
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#define GST_CAT_DEFAULT rtsp_media_debug
static guint gst_rtsp_media_factory_signals[SIGNAL_LAST] = { 0 };
static void gst_rtsp_media_factory_get_property (GObject * object, guint propid,
GValue * value, GParamSpec * pspec);
static void gst_rtsp_media_factory_set_property (GObject * object, guint propid,
const GValue * value, GParamSpec * pspec);
static void gst_rtsp_media_factory_finalize (GObject * obj);
static gchar *default_gen_key (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url);
static GstElement *default_create_element (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url);
static GstRTSPMedia *default_construct (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url);
static void default_configure (GstRTSPMediaFactory * factory,
GstRTSPMedia * media);
static GstElement *default_create_pipeline (GstRTSPMediaFactory * factory,
GstRTSPMedia * media);
G_DEFINE_TYPE (GstRTSPMediaFactory, gst_rtsp_media_factory, G_TYPE_OBJECT);
static void
gst_rtsp_media_factory_class_init (GstRTSPMediaFactoryClass * klass)
{
GObjectClass *gobject_class;
g_type_class_add_private (klass, sizeof (GstRTSPMediaFactoryPrivate));
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->get_property = gst_rtsp_media_factory_get_property;
gobject_class->set_property = gst_rtsp_media_factory_set_property;
gobject_class->finalize = gst_rtsp_media_factory_finalize;
/**
* GstRTSPMediaFactory::launch:
*
* The gst_parse_launch() line to use for constructing the pipeline in the
* default prepare vmethod.
*
* The pipeline description should return a GstBin as the toplevel element
* which can be accomplished by enclosing the dscription with brackets '('
* ')'.
*
* The description should return a pipeline with payloaders named pay0, pay1,
* etc.. Each of the payloaders will result in a stream.
*
* Support for dynamic payloaders can be accomplished by adding payloaders
* named dynpay0, dynpay1, etc..
*/
g_object_class_install_property (gobject_class, PROP_LAUNCH,
g_param_spec_string ("launch", "Launch",
"A launch description of the pipeline", DEFAULT_LAUNCH,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SHARED,
g_param_spec_boolean ("shared", "Shared",
"If media from this factory is shared", DEFAULT_SHARED,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_EOS_SHUTDOWN,
g_param_spec_boolean ("eos-shutdown", "EOS Shutdown",
"Send EOS down the pipeline before shutting down",
DEFAULT_EOS_SHUTDOWN, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PROTOCOLS,
g_param_spec_flags ("protocols", "Protocols",
"Allowed lower transport protocols", GST_TYPE_RTSP_LOWER_TRANS,
DEFAULT_PROTOCOLS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_BUFFER_SIZE,
g_param_spec_uint ("buffer-size", "Buffer Size",
"The kernel UDP buffer size to use", 0, G_MAXUINT,
DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONSTRUCTED] =
g_signal_new ("media-constructed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRTSPMediaFactoryClass,
media_constructed), NULL, NULL, g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GST_TYPE_RTSP_MEDIA);
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONFIGURE] =
g_signal_new ("media-configure", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstRTSPMediaFactoryClass,
media_configure), NULL, NULL, g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GST_TYPE_RTSP_MEDIA);
klass->gen_key = default_gen_key;
klass->create_element = default_create_element;
klass->construct = default_construct;
klass->configure = default_configure;
klass->create_pipeline = default_create_pipeline;
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GST_DEBUG_CATEGORY_INIT (rtsp_media_debug, "rtspmediafactory", 0,
"GstRTSPMediaFactory");
}
static void
gst_rtsp_media_factory_init (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv =
GST_RTSP_MEDIA_FACTORY_GET_PRIVATE (factory);
factory->priv = priv;
priv->launch = g_strdup (DEFAULT_LAUNCH);
priv->shared = DEFAULT_SHARED;
priv->eos_shutdown = DEFAULT_EOS_SHUTDOWN;
priv->protocols = DEFAULT_PROTOCOLS;
priv->buffer_size = DEFAULT_BUFFER_SIZE;
g_mutex_init (&priv->lock);
g_mutex_init (&priv->medias_lock);
priv->medias = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, g_object_unref);
}
static void
gst_rtsp_media_factory_finalize (GObject * obj)
{
GstRTSPMediaFactory *factory = GST_RTSP_MEDIA_FACTORY (obj);
GstRTSPMediaFactoryPrivate *priv = factory->priv;
g_hash_table_unref (priv->medias);
g_mutex_clear (&priv->medias_lock);
g_free (priv->launch);
g_mutex_clear (&priv->lock);
if (priv->pool)
g_object_unref (priv->pool);
G_OBJECT_CLASS (gst_rtsp_media_factory_parent_class)->finalize (obj);
}
static void
gst_rtsp_media_factory_get_property (GObject * object, guint propid,
GValue * value, GParamSpec * pspec)
{
GstRTSPMediaFactory *factory = GST_RTSP_MEDIA_FACTORY (object);
switch (propid) {
case PROP_LAUNCH:
g_value_take_string (value, gst_rtsp_media_factory_get_launch (factory));
break;
case PROP_SHARED:
g_value_set_boolean (value, gst_rtsp_media_factory_is_shared (factory));
break;
case PROP_EOS_SHUTDOWN:
g_value_set_boolean (value,
gst_rtsp_media_factory_is_eos_shutdown (factory));
break;
case PROP_PROTOCOLS:
g_value_set_flags (value, gst_rtsp_media_factory_get_protocols (factory));
break;
case PROP_BUFFER_SIZE:
g_value_set_uint (value,
gst_rtsp_media_factory_get_buffer_size (factory));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
}
}
static void
gst_rtsp_media_factory_set_property (GObject * object, guint propid,
const GValue * value, GParamSpec * pspec)
{
GstRTSPMediaFactory *factory = GST_RTSP_MEDIA_FACTORY (object);
switch (propid) {
case PROP_LAUNCH:
gst_rtsp_media_factory_set_launch (factory, g_value_get_string (value));
break;
case PROP_SHARED:
gst_rtsp_media_factory_set_shared (factory, g_value_get_boolean (value));
break;
case PROP_EOS_SHUTDOWN:
gst_rtsp_media_factory_set_eos_shutdown (factory,
g_value_get_boolean (value));
break;
case PROP_PROTOCOLS:
gst_rtsp_media_factory_set_protocols (factory, g_value_get_flags (value));
break;
case PROP_BUFFER_SIZE:
gst_rtsp_media_factory_set_buffer_size (factory,
g_value_get_uint (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
}
}
/**
* gst_rtsp_media_factory_new:
*
* Create a new #GstRTSPMediaFactory instance.
*
* Returns: a new #GstRTSPMediaFactory object.
*/
GstRTSPMediaFactory *
gst_rtsp_media_factory_new (void)
{
GstRTSPMediaFactory *result;
result = g_object_new (GST_TYPE_RTSP_MEDIA_FACTORY, NULL);
return result;
}
/**
* gst_rtsp_media_factory_set_permissions:
* @factory: a #GstRTSPMediaFactory
* @permissions: a #GstRTSPPermissions
*
* Set @permissions on @factory.
*/
void
gst_rtsp_media_factory_set_permissions (GstRTSPMediaFactory * factory,
GstRTSPPermissions * permissions)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
if (priv->permissions)
gst_rtsp_permissions_unref (priv->permissions);
if ((priv->permissions = permissions))
gst_rtsp_permissions_ref (permissions);
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_get_permissions:
* @factory: a #GstRTSPMediaFactory
*
* Get the permissions object from @factory.
*
* Returns: (transfer full): a #GstRTSPPermissions object, unref after usage.
*/
GstRTSPPermissions *
gst_rtsp_media_factory_get_permissions (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
GstRTSPPermissions *result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
if ((result = priv->permissions))
gst_rtsp_permissions_ref (result);
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_add_role:
* @factory: a #GstRTSPMediaFactory
* @role: a role
* @fieldname: the first field name
* @...: additional arguments
*
* A convenience method to add @role with @fieldname and additional arguments to
* the permissions of @factory. If @factory had no permissions, new permissions
* will be created and the role will be added to it.
*/
void
gst_rtsp_media_factory_add_role (GstRTSPMediaFactory * factory,
const gchar * role, const gchar * fieldname, ...)
{
GstRTSPMediaFactoryPrivate *priv;
va_list var_args;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
g_return_if_fail (role != NULL);
g_return_if_fail (fieldname != NULL);
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
if (priv->permissions == NULL)
priv->permissions = gst_rtsp_permissions_new ();
va_start (var_args, fieldname);
gst_rtsp_permissions_add_role_valist (priv->permissions, role, fieldname,
var_args);
va_end (var_args);
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_set_launch:
* @factory: a #GstRTSPMediaFactory
* @launch: the launch description
*
*
* The gst_parse_launch() line to use for constructing the pipeline in the
* default prepare vmethod.
*
* The pipeline description should return a GstBin as the toplevel element
* which can be accomplished by enclosing the dscription with brackets '('
* ')'.
*
* The description should return a pipeline with payloaders named pay0, pay1,
* etc.. Each of the payloaders will result in a stream.
*/
void
gst_rtsp_media_factory_set_launch (GstRTSPMediaFactory * factory,
const gchar * launch)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
g_return_if_fail (launch != NULL);
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
g_free (priv->launch);
priv->launch = g_strdup (launch);
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_get_launch:
* @factory: a #GstRTSPMediaFactory
*
* Get the gst_parse_launch() pipeline description that will be used in the
* default prepare vmethod.
*
* Returns: the configured launch description. g_free() after usage.
*/
gchar *
gst_rtsp_media_factory_get_launch (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
gchar *result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
result = g_strdup (priv->launch);
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_set_shared:
* @factory: a #GstRTSPMediaFactory
* @shared: the new value
*
* Configure if media created from this factory can be shared between clients.
*/
void
gst_rtsp_media_factory_set_shared (GstRTSPMediaFactory * factory,
gboolean shared)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
priv->shared = shared;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_is_shared:
* @factory: a #GstRTSPMediaFactory
*
* Get if media created from this factory can be shared between clients.
*
* Returns: %TRUE if the media will be shared between clients.
*/
gboolean
gst_rtsp_media_factory_is_shared (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
gboolean result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), FALSE);
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
result = priv->shared;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_set_eos_shutdown:
* @factory: a #GstRTSPMediaFactory
* @eos_shutdown: the new value
*
* Configure if media created from this factory will have an EOS sent to the
* pipeline before shutdown.
*/
void
gst_rtsp_media_factory_set_eos_shutdown (GstRTSPMediaFactory * factory,
gboolean eos_shutdown)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
priv->eos_shutdown = eos_shutdown;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_is_eos_shutdown:
* @factory: a #GstRTSPMediaFactory
*
* Get if media created from this factory will have an EOS event sent to the
* pipeline before shutdown.
*
* Returns: %TRUE if the media will receive EOS before shutdown.
*/
gboolean
gst_rtsp_media_factory_is_eos_shutdown (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
gboolean result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), FALSE);
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
result = priv->eos_shutdown;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_set_buffer_size:
* @factory: a #GstRTSPMedia
* @size: the new value
*
* Set the kernel UDP buffer size.
*/
void
gst_rtsp_media_factory_set_buffer_size (GstRTSPMediaFactory * factory,
guint size)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
priv->buffer_size = size;
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_get_buffer_size:
* @factory: a #GstRTSPMedia
*
* Get the kernel UDP buffer size.
*
* Returns: the kernel UDP buffer size.
*/
guint
gst_rtsp_media_factory_get_buffer_size (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
guint result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), 0);
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
result = priv->buffer_size;
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_set_address_pool:
* @factory: a #GstRTSPMediaFactory
* @pool: a #GstRTSPAddressPool
*
* configure @pool to be used as the address pool of @factory.
*/
void
gst_rtsp_media_factory_set_address_pool (GstRTSPMediaFactory * factory,
GstRTSPAddressPool * pool)
{
GstRTSPMediaFactoryPrivate *priv;
GstRTSPAddressPool *old;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
if ((old = priv->pool) != pool)
priv->pool = pool ? g_object_ref (pool) : NULL;
else
old = NULL;
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
if (old)
g_object_unref (old);
}
/**
* gst_rtsp_media_factory_get_address_pool:
* @factory: a #GstRTSPMediaFactory
*
* Get the #GstRTSPAddressPool used as the address pool of @factory.
*
* Returns: (transfer full): the #GstRTSPAddressPool of @factory. g_object_unref() after
* usage.
*/
GstRTSPAddressPool *
gst_rtsp_media_factory_get_address_pool (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
GstRTSPAddressPool *result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
priv = factory->priv;
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
if ((result = priv->pool))
g_object_ref (result);
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return result;
}
/**
* gst_rtsp_media_factory_set_protocols:
* @factory: a #GstRTSPMediaFactory
* @protocols: the new flags
*
* Configure the allowed lower transport for @factory.
*/
void
gst_rtsp_media_factory_set_protocols (GstRTSPMediaFactory * factory,
GstRTSPLowerTrans protocols)
{
GstRTSPMediaFactoryPrivate *priv;
g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory));
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
priv->protocols = protocols;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
}
/**
* gst_rtsp_media_factory_get_protocols:
* @factory: a #GstRTSPMediaFactory
*
* Get the allowed protocols of @factory.
*
* Returns: a #GstRTSPLowerTrans
*/
GstRTSPLowerTrans
gst_rtsp_media_factory_get_protocols (GstRTSPMediaFactory * factory)
{
GstRTSPMediaFactoryPrivate *priv;
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GstRTSPLowerTrans res;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory),
GST_RTSP_LOWER_TRANS_UNKNOWN);
priv = factory->priv;
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GST_RTSP_MEDIA_FACTORY_LOCK (factory);
res = priv->protocols;
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GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
return res;
}
static gboolean
compare_media (gpointer key, GstRTSPMedia * media1, GstRTSPMedia * media2)
{
return (media1 == media2);
}
static void
media_unprepared (GstRTSPMedia * media, GWeakRef * ref)
{
GstRTSPMediaFactory *factory = g_weak_ref_get (ref);
GstRTSPMediaFactoryPrivate *priv;
if (!factory)
return;
priv = factory->priv;;
g_mutex_lock (&priv->medias_lock);
g_hash_table_foreach_remove (priv->medias, (GHRFunc) compare_media, media);
g_mutex_unlock (&priv->medias_lock);
g_object_unref (factory);
}
static GWeakRef *
weak_ref_new (gpointer obj)
{
GWeakRef *ref = g_slice_new (GWeakRef);
g_weak_ref_init (ref, obj);
return ref;
}
static void
weak_ref_free (GWeakRef * ref)
{
g_weak_ref_clear (ref);
g_slice_free (GWeakRef, ref);
}
/**
* gst_rtsp_media_factory_construct:
* @factory: a #GstRTSPMediaFactory
* @url: the url used
*
* Construct the media object and create its streams. Implementations
* should create the needed gstreamer elements and add them to the result
* object. No state changes should be performed on them yet.
*
* One or more GstRTSPStream objects should be created from the result
* with gst_rtsp_media_create_stream ().
*
* After the media is constructed, it can be configured and then prepared
* with gst_rtsp_media_prepare ().
*
* Returns: (transfer full): a new #GstRTSPMedia if the media could be prepared.
*/
GstRTSPMedia *
gst_rtsp_media_factory_construct (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url)
{
GstRTSPMediaFactoryPrivate *priv;
gchar *key;
GstRTSPMedia *media;
GstRTSPMediaFactoryClass *klass;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
g_return_val_if_fail (url != NULL, NULL);
priv = factory->priv;;
klass = GST_RTSP_MEDIA_FACTORY_GET_CLASS (factory);
/* convert the url to a key for the hashtable. NULL return or a NULL function
* will not cache anything for this factory. */
if (klass->gen_key)
key = klass->gen_key (factory, url);
else
key = NULL;
g_mutex_lock (&priv->medias_lock);
if (key) {
/* we have a key, see if we find a cached media */
media = g_hash_table_lookup (priv->medias, key);
if (media)
g_object_ref (media);
} else
media = NULL;
if (media == NULL) {
/* nothing cached found, try to create one */
if (klass->construct) {
media = klass->construct (factory, url);
if (media)
g_signal_emit (factory,
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONSTRUCTED], 0, media,
NULL);
} else
media = NULL;
if (media) {
/* configure the media */
if (klass->configure)
klass->configure (factory, media);
g_signal_emit (factory,
gst_rtsp_media_factory_signals[SIGNAL_MEDIA_CONFIGURE], 0, media,
NULL);
/* check if we can cache this media */
if (gst_rtsp_media_is_shared (media)) {
/* insert in the hashtable, takes ownership of the key */
g_object_ref (media);
g_hash_table_insert (priv->medias, key, media);
key = NULL;
}
if (!gst_rtsp_media_is_reusable (media)) {
/* when not reusable, connect to the unprepare signal to remove the item
* from our cache when it gets unprepared */
g_signal_connect_data (media, "unprepared",
(GCallback) media_unprepared, weak_ref_new (factory),
(GClosureNotify) weak_ref_free, 0);
}
}
}
g_mutex_unlock (&priv->medias_lock);
if (key)
g_free (key);
2009-11-21 18:20:23 +00:00
GST_INFO ("constructed media %p for url %s", media, url->abspath);
return media;
}
static gchar *
default_gen_key (GstRTSPMediaFactory * factory, const GstRTSPUrl * url)
{
gchar *result;
const gchar *pre_query;
const gchar *query;
pre_query = url->query ? "?" : "";
query = url->query ? url->query : "";
result =
g_strdup_printf ("%u%s%s%s", url->port, url->abspath, pre_query, query);
return result;
}
static GstElement *
default_create_element (GstRTSPMediaFactory * factory, const GstRTSPUrl * url)
{
GstRTSPMediaFactoryPrivate *priv = factory->priv;
GstElement *element;
GError *error = NULL;
2010-12-11 12:41:24 +00:00
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
/* we need a parse syntax */
if (priv->launch == NULL)
goto no_launch;
/* parse the user provided launch line */
element = gst_parse_launch (priv->launch, &error);
if (element == NULL)
goto parse_error;
2010-12-11 12:41:24 +00:00
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
if (error != NULL) {
/* a recoverable error was encountered */
2009-11-21 18:20:23 +00:00
GST_WARNING ("recoverable parsing error: %s", error->message);
g_error_free (error);
}
return element;
/* ERRORS */
no_launch:
{
2010-12-11 12:41:24 +00:00
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
g_critical ("no launch line specified");
return NULL;
}
parse_error:
{
g_critical ("could not parse launch syntax (%s): %s", priv->launch,
(error ? error->message : "unknown reason"));
2013-02-18 19:59:58 +00:00
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
if (error)
g_error_free (error);
return NULL;
}
}
static GstRTSPMedia *
default_construct (GstRTSPMediaFactory * factory, const GstRTSPUrl * url)
{
GstRTSPMedia *media;
GstElement *element, *pipeline;
GstRTSPMediaFactoryClass *klass;
klass = GST_RTSP_MEDIA_FACTORY_GET_CLASS (factory);
if (!klass->create_pipeline)
goto no_create;
element = gst_rtsp_media_factory_create_element (factory, url);
if (element == NULL)
goto no_element;
/* create a new empty media */
media = gst_rtsp_media_new (element);
gst_rtsp_media_collect_streams (media);
pipeline = klass->create_pipeline (factory, media);
if (pipeline == NULL)
goto no_pipeline;
return media;
/* ERRORS */
no_create:
{
g_critical ("no create_pipeline function");
return NULL;
}
no_element:
{
g_critical ("could not create element");
return NULL;
}
no_pipeline:
{
g_critical ("can't create pipeline");
g_object_unref (media);
return NULL;
}
}
static GstElement *
default_create_pipeline (GstRTSPMediaFactory * factory, GstRTSPMedia * media)
{
GstElement *pipeline;
pipeline = gst_pipeline_new ("media-pipeline");
gst_rtsp_media_take_pipeline (media, GST_PIPELINE_CAST (pipeline));
return pipeline;
}
static void
default_configure (GstRTSPMediaFactory * factory, GstRTSPMedia * media)
{
GstRTSPMediaFactoryPrivate *priv = factory->priv;
gboolean shared, eos_shutdown;
guint size;
GstRTSPLowerTrans protocols;
GstRTSPAddressPool *pool;
GstRTSPPermissions *perms;
/* configure the sharedness */
2010-12-11 12:41:24 +00:00
GST_RTSP_MEDIA_FACTORY_LOCK (factory);
shared = priv->shared;
eos_shutdown = priv->eos_shutdown;
size = priv->buffer_size;
protocols = priv->protocols;
2010-12-11 12:41:24 +00:00
GST_RTSP_MEDIA_FACTORY_UNLOCK (factory);
gst_rtsp_media_set_shared (media, shared);
gst_rtsp_media_set_eos_shutdown (media, eos_shutdown);
gst_rtsp_media_set_buffer_size (media, size);
gst_rtsp_media_set_protocols (media, protocols);
if ((pool = gst_rtsp_media_factory_get_address_pool (factory))) {
gst_rtsp_media_set_address_pool (media, pool);
g_object_unref (pool);
}
if ((perms = gst_rtsp_media_factory_get_permissions (factory))) {
gst_rtsp_media_set_permissions (media, perms);
gst_rtsp_permissions_unref (perms);
}
}
/**
* gst_rtsp_media_factory_create_element:
* @factory: a #GstRTSPMediaFactory
* @url: the url used
*
* 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.
*
* Returns: (transfer floating) a new #GstElement.
*/
GstElement *
gst_rtsp_media_factory_create_element (GstRTSPMediaFactory * factory,
const GstRTSPUrl * url)
{
GstRTSPMediaFactoryClass *klass;
GstElement *result;
g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY (factory), NULL);
2012-11-28 11:10:14 +00:00
g_return_val_if_fail (url != NULL, NULL);
klass = GST_RTSP_MEDIA_FACTORY_GET_CLASS (factory);
if (klass->create_element)
result = klass->create_element (factory, url);
else
result = NULL;
return result;
}