gstreamer/subprojects/gst-plugins-bad/gst/transcode/gsturitranscodebin.c

758 lines
22 KiB
C

/* GStreamer
* Copyright (C) 2019 Thibault Saunier <tsaunier@igalia.com>
*
* gsturitranscodebin.c:
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gsttranscoding.h"
#include "gsttranscodeelements.h"
#if HAVE_GETRUSAGE
#include "gst-cpu-throttling-clock.h"
#endif
#include <gst/pbutils/pbutils.h>
#include <gst/pbutils/missing-plugins.h>
GST_DEBUG_CATEGORY_STATIC (gst_uri_transcodebin_debug);
#define GST_CAT_DEFAULT gst_uri_transcodebin_debug
typedef struct
{
GstPipeline parent;
GstElement *src;
gchar *source_uri;
GstElement *transcodebin;
GstElement *audio_filter;
GstElement *video_filter;
GstEncodingProfile *profile;
gboolean avoid_reencoding;
guint wanted_cpu_usage;
GstElement *sink;
gchar *dest_uri;
GstClock *cpu_clock;
} GstUriTranscodeBin;
typedef struct
{
GstPipelineClass parent;
} GstUriTranscodeBinClass;
/* *INDENT-OFF* */
#define parent_class gst_uri_transcode_bin_parent_class
#define GST_TYPE_URI_TRANSCODE_BIN (gst_uri_transcode_bin_get_type ())
#define GST_URI_TRANSCODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_URI_TRANSCODE_BIN, GstUriTranscodeBin))
#define GST_URI_TRANSCODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_URI_TRANSCODE_BIN_TYPE, GstUriTranscodeBinClass))
#define GST_IS_TRANSCODE_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_URI_TRANSCODE_BIN_TYPE))
#define GST_IS_TRANSCODE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_URI_TRANSCODE_BIN_TYPE))
#define GST_URI_TRANSCODE_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_URI_TRANSCODE_BIN_TYPE, GstUriTranscodeBinClass))
#define DEFAULT_AVOID_REENCODING FALSE
G_DEFINE_TYPE (GstUriTranscodeBin, gst_uri_transcode_bin, GST_TYPE_PIPELINE);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (uritranscodebin, "uritranscodebin", GST_RANK_NONE,
gst_uri_transcode_bin_get_type (), transcodebin_element_init (plugin));
enum
{
PROP_0,
PROP_PROFILE,
PROP_SOURCE_URI,
PROP_DEST_URI,
PROP_AVOID_REENCODING,
PROP_SINK,
PROP_SRC,
PROP_CPU_USAGE,
PROP_VIDEO_FILTER,
PROP_AUDIO_FILTER,
LAST_PROP
};
/* signals */
enum
{
SIGNAL_SOURCE_SETUP,
SIGNAL_ELEMENT_SETUP,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void
post_missing_plugin_error (GstElement * dec, const gchar * element_name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (dec, element_name);
gst_element_post_message (dec, msg);
GST_ELEMENT_ERROR (dec, CORE, MISSING_PLUGIN,
("Missing element '%s' - check your GStreamer installation.",
element_name), (NULL));
}
/* *INDENT-ON* */
static gboolean
make_dest (GstUriTranscodeBin * self)
{
GError *err = NULL;
GST_OBJECT_LOCK (self);
if (!self->dest_uri) {
GST_INFO_OBJECT (self, "Sink already set: %" GST_PTR_FORMAT, self->sink);
goto ok_unlock;
}
if (!self->dest_uri)
goto ok_unlock;
if (!gst_uri_is_valid (self->dest_uri))
goto invalid_uri_unlock;
self->sink = gst_element_make_from_uri (GST_URI_SINK, self->dest_uri,
"sink", &err);
if (!self->sink)
goto no_sink_unlock;
GST_OBJECT_UNLOCK (self);
gst_bin_add (GST_BIN (self), self->sink);
g_object_set (self->sink, "sync", TRUE, "max-lateness", GST_CLOCK_TIME_NONE,
NULL);
return TRUE;
ok_unlock:
GST_OBJECT_UNLOCK (self);
return TRUE;
invalid_uri_unlock:
{
GST_OBJECT_UNLOCK (self);
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("Invalid URI \"%s\".", self->dest_uri), (NULL));
g_clear_error (&err);
return FALSE;
}
invalid_uri:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("Invalid URI \"%s\".", self->source_uri), (NULL));
g_clear_error (&err);
return FALSE;
}
no_sink_unlock:
{
GST_OBJECT_UNLOCK (self);
/* whoops, could not create the source element, dig a little deeper to
* figure out what might be wrong. */
if (err != NULL && err->code == GST_URI_ERROR_UNSUPPORTED_PROTOCOL) {
gchar *prot;
prot = gst_uri_get_protocol (self->dest_uri);
if (prot == NULL)
goto invalid_uri;
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_missing_uri_source_message_new (GST_ELEMENT (self), prot));
GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN,
("No URI handler implemented for \"%s\".", prot), (NULL));
g_free (prot);
} else {
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("%s", (err) ? err->message : "URI was not accepted by any element"),
("No element accepted URI '%s'", self->dest_uri));
}
g_clear_error (&err);
return FALSE;
}
}
static void
transcodebin_pad_added_cb (GstElement * transcodebin, GstPad * pad,
GstUriTranscodeBin * self)
{
GstPad *sinkpad;
if (GST_PAD_IS_SINK (pad))
return;
make_dest (self);
if (!self->sink) {
GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL), ("No sink configured."));
return;
}
sinkpad = gst_element_get_static_pad (self->sink, "sink");
if (!sinkpad) {
GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL), ("Sink has not sinkpad?!"));
return;
}
if (gst_pad_link (pad, sinkpad) != GST_PAD_LINK_OK) {
GST_ERROR_OBJECT (self,
"Could not link %" GST_PTR_FORMAT " and %" GST_PTR_FORMAT, pad,
sinkpad);
/* Let `pad unlinked` error pop up later */
}
gst_object_unref (sinkpad);
}
static gboolean
make_transcodebin (GstUriTranscodeBin * self)
{
GST_INFO_OBJECT (self, "making new transcodebin");
self->transcodebin = gst_element_factory_make ("transcodebin", NULL);
if (!self->transcodebin)
goto no_transcodebin;
g_signal_connect (self->transcodebin, "pad-added",
G_CALLBACK (transcodebin_pad_added_cb), self);
g_object_set (self->transcodebin, "profile", self->profile,
"video-filter", self->video_filter,
"audio-filter", self->audio_filter,
"avoid-reencoding", self->avoid_reencoding, NULL);
gst_bin_add (GST_BIN (self), self->transcodebin);
return TRUE;
/* ERRORS */
no_transcodebin:
{
post_missing_plugin_error (GST_ELEMENT_CAST (self), "transcodebin");
GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
("No transcodebin element, check your installation"));
return FALSE;
}
}
static void
src_pad_added_cb (GstElement * src, GstPad * pad, GstUriTranscodeBin * self)
{
GstPad *sinkpad = NULL;
GstPadLinkReturn res;
GST_DEBUG_OBJECT (self,
"New pad %" GST_PTR_FORMAT " from source %" GST_PTR_FORMAT, pad, src);
sinkpad = gst_element_get_static_pad (self->transcodebin, "sink");
if (gst_pad_is_linked (sinkpad))
sinkpad = gst_element_request_pad_simple (self->transcodebin, "sink_%u");
if (sinkpad) {
GST_DEBUG_OBJECT (self,
"Linking %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT, pad, sinkpad);
res = gst_pad_link (pad, sinkpad);
gst_object_unref (sinkpad);
if (GST_PAD_LINK_FAILED (res))
goto link_failed;
}
return;
link_failed:
{
GST_ERROR_OBJECT (self,
"failed to link pad %s:%s to decodebin, reason %s (%d)",
GST_DEBUG_PAD_NAME (pad), gst_pad_link_get_name (res), res);
return;
}
}
static void
src_pad_removed_cb (GstElement * element, GstPad * pad,
GstUriTranscodeBin * self)
{
/* FIXME : IMPLEMENT */
}
static void
source_setup_cb (GstElement * element, GstElement * source,
GstUriTranscodeBin * self)
{
g_signal_emit (self, signals[SIGNAL_SOURCE_SETUP], 0, source);
}
static gboolean
make_source (GstUriTranscodeBin * self)
{
GError *err = NULL;
if (!gst_uri_is_valid (self->source_uri))
goto invalid_uri;
self->src = gst_element_factory_make ("urisourcebin", NULL);
if (!self->src)
goto no_urisourcebin;
gst_bin_add (GST_BIN (self), self->src);
g_object_set (self->src, "uri", self->source_uri, NULL);
g_signal_connect (self->src, "pad-added", (GCallback) src_pad_added_cb, self);
g_signal_connect (self->src, "pad-removed",
(GCallback) src_pad_removed_cb, self);
g_signal_connect (self->src, "source-setup",
G_CALLBACK (source_setup_cb), self);
return TRUE;
invalid_uri:
{
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("Invalid URI \"%s\".", self->source_uri), (NULL));
g_clear_error (&err);
return FALSE;
}
no_urisourcebin:
{
post_missing_plugin_error (GST_ELEMENT_CAST (self), "urisourcebin");
GST_ELEMENT_ERROR (self, CORE, MISSING_PLUGIN, (NULL),
("No urisourcebin element, check your installation"));
return FALSE;
}
}
static void
remove_all_children (GstUriTranscodeBin * self)
{
if (self->sink) {
gst_element_set_state (self->sink, GST_STATE_NULL);
gst_bin_remove (GST_BIN (self), self->sink);
self->sink = NULL;
}
if (self->transcodebin) {
gst_element_set_state (self->transcodebin, GST_STATE_NULL);
gst_bin_remove (GST_BIN (self), self->transcodebin);
self->transcodebin = NULL;
}
if (self->src) {
gst_element_set_state (self->src, GST_STATE_NULL);
gst_bin_remove (GST_BIN (self), self->src);
self->src = NULL;
}
}
static void
set_location_on_muxer_if_sink (GstUriTranscodeBin * self, GstElement * child)
{
GstElementFactory *factory = gst_element_get_factory (child);
if (!factory)
return;
if (!self->dest_uri)
return;
/* Set out dest URI as location for muxer sinks. */
if (!gst_element_factory_list_is_type (factory,
GST_ELEMENT_FACTORY_TYPE_MUXER) ||
!gst_element_factory_list_is_type (factory,
GST_ELEMENT_FACTORY_TYPE_SINK)) {
return;
}
if (!g_object_class_find_property (G_OBJECT_GET_CLASS (child), "location"))
return;
if (!gst_uri_has_protocol (self->dest_uri, "file")) {
GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
("Trying to use a not local file with a muxing sink which is not"
" supported."), (NULL));
return;
}
GST_OBJECT_FLAG_SET (self->transcodebin, GST_ELEMENT_FLAG_SINK);
g_object_set (child, "location", &self->dest_uri[strlen ("file://")], NULL);
GST_DEBUG_OBJECT (self, "Setting location: %s",
&self->dest_uri[strlen ("file://")]);
}
static void
deep_element_added (GstBin * bin, GstBin * sub_bin, GstElement * child)
{
GstUriTranscodeBin *self = GST_URI_TRANSCODE_BIN (bin);
set_location_on_muxer_if_sink (self, child);
g_signal_emit (bin, signals[SIGNAL_ELEMENT_SETUP], 0, child);
GST_BIN_CLASS (parent_class)->deep_element_added (bin, sub_bin, child);
}
static GstStateChangeReturn
gst_uri_transcode_bin_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstUriTranscodeBin *self = GST_URI_TRANSCODE_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!make_transcodebin (self))
goto setup_failed;
if (!make_source (self))
goto setup_failed;
if (self->sink && gst_element_set_state (self->sink,
GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) {
GST_ERROR_OBJECT (self,
"Could not set %" GST_PTR_FORMAT " state to PAUSED", self->sink);
goto setup_failed;
}
if (gst_element_set_state (self->transcodebin,
GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) {
GST_ERROR_OBJECT (self,
"Could not set %" GST_PTR_FORMAT " state to PAUSED",
self->transcodebin);
goto setup_failed;
}
if (gst_element_set_state (self->src,
GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) {
GST_ERROR_OBJECT (self,
"Could not set %" GST_PTR_FORMAT " state to PAUSED", self->src);
goto setup_failed;
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto beach;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
remove_all_children (self);
break;
default:
break;
}
beach:
return ret;
setup_failed:
remove_all_children (self);
return GST_STATE_CHANGE_FAILURE;
}
static void
gst_uri_transcode_bin_constructed (GObject * object)
{
#if HAVE_GETRUSAGE
GstUriTranscodeBin *self = GST_URI_TRANSCODE_BIN (object);
self->cpu_clock =
GST_CLOCK (gst_cpu_throttling_clock_new (self->wanted_cpu_usage));
gst_pipeline_use_clock (GST_PIPELINE (self), self->cpu_clock);
#endif
((GObjectClass *) parent_class)->constructed (object);
}
static void
gst_uri_transcode_bin_dispose (GObject * object)
{
GstUriTranscodeBin *self = (GstUriTranscodeBin *) object;
g_clear_object (&self->video_filter);
g_clear_object (&self->audio_filter);
g_clear_object (&self->cpu_clock);
g_free (self->source_uri);
g_free (self->dest_uri);
gst_clear_object (&self->profile);
G_OBJECT_CLASS (gst_uri_transcode_bin_parent_class)->dispose (object);
}
static void
gst_uri_transcode_bin_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstUriTranscodeBin *self = GST_URI_TRANSCODE_BIN (object);
switch (prop_id) {
case PROP_PROFILE:
GST_OBJECT_LOCK (self);
g_value_set_object (value, self->profile);
GST_OBJECT_UNLOCK (self);
break;
case PROP_DEST_URI:
GST_OBJECT_LOCK (self);
g_value_set_string (value, self->dest_uri);
GST_OBJECT_UNLOCK (self);
break;
case PROP_SOURCE_URI:
GST_OBJECT_LOCK (self);
g_value_set_string (value, self->source_uri);
GST_OBJECT_UNLOCK (self);
break;
case PROP_AVOID_REENCODING:
GST_OBJECT_LOCK (self);
g_value_set_boolean (value, self->avoid_reencoding);
GST_OBJECT_UNLOCK (self);
break;
case PROP_CPU_USAGE:
GST_OBJECT_LOCK (self);
g_value_set_uint (value, self->wanted_cpu_usage);
GST_OBJECT_UNLOCK (self);
break;
case PROP_VIDEO_FILTER:
GST_OBJECT_LOCK (self);
g_value_set_object (value, self->video_filter);
GST_OBJECT_UNLOCK (self);
break;
case PROP_AUDIO_FILTER:
GST_OBJECT_LOCK (self);
g_value_set_object (value, self->audio_filter);
GST_OBJECT_UNLOCK (self);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_uri_transcode_bin_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstUriTranscodeBin *self = GST_URI_TRANSCODE_BIN (object);
switch (prop_id) {
case PROP_PROFILE:
GST_OBJECT_LOCK (self);
self->profile = g_value_dup_object (value);
GST_OBJECT_UNLOCK (self);
break;
case PROP_DEST_URI:
GST_OBJECT_LOCK (self);
g_free (self->dest_uri);
self->dest_uri = g_value_dup_string (value);
GST_OBJECT_UNLOCK (self);
break;
case PROP_SOURCE_URI:
GST_OBJECT_LOCK (self);
g_free (self->source_uri);
self->source_uri = g_value_dup_string (value);
GST_OBJECT_UNLOCK (self);
break;
case PROP_AVOID_REENCODING:
GST_OBJECT_LOCK (self);
self->avoid_reencoding = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (self);
break;
case PROP_CPU_USAGE:
#if HAVE_GETRUSAGE
GST_OBJECT_LOCK (self);
self->wanted_cpu_usage = g_value_get_uint (value);
g_object_set (self->cpu_clock, "cpu-usage", self->wanted_cpu_usage, NULL);
GST_OBJECT_UNLOCK (self);
#else
GST_ERROR_OBJECT (self,
"No CPU usage throttling support for that platform");
#endif
break;
case PROP_AUDIO_FILTER:
GST_OBJECT_LOCK (self);
gst_clear_object (&self->audio_filter);
self->audio_filter = g_value_dup_object (value);
GST_OBJECT_UNLOCK (self);
break;
case PROP_VIDEO_FILTER:
GST_OBJECT_LOCK (self);
gst_clear_object (&self->video_filter);
self->video_filter = g_value_dup_object (value);
GST_OBJECT_UNLOCK (self);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gst_uri_transcode_bin_class_init (GstUriTranscodeBinClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
object_class->get_property = gst_uri_transcode_bin_get_property;
object_class->set_property = gst_uri_transcode_bin_set_property;
object_class->constructed = gst_uri_transcode_bin_constructed;
object_class->dispose = gst_uri_transcode_bin_dispose;
gstelement_klass = (GstElementClass *) klass;
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_uri_transcode_bin_change_state);
gstbin_klass = (GstBinClass *) klass;
gstbin_klass->deep_element_added = GST_DEBUG_FUNCPTR (deep_element_added);
GST_DEBUG_CATEGORY_INIT (gst_uri_transcodebin_debug, "uritranscodebin", 0,
"UriTranscodebin element");
gst_element_class_set_static_metadata (gstelement_klass,
"URITranscode Bin", "Generic/Bin/Encoding",
"Autoplug and transcoder media from uris",
"Thibault Saunier <tsaunier@igalia.com>");
/**
* GstUriTranscodeBin:profile:
*
* The #GstEncodingProfile to use. This property must be set before going
* to %GST_STATE_PAUSED or higher.
*/
g_object_class_install_property (object_class, PROP_PROFILE,
g_param_spec_object ("profile", "Profile",
"The GstEncodingProfile to use", GST_TYPE_ENCODING_PROFILE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin:source-uri:
*
* The URI of the stream to encode
*/
g_object_class_install_property (object_class, PROP_SOURCE_URI,
g_param_spec_string ("source-uri", "Source URI", "URI to decode",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin:dest-uri:
*
* The destination URI to which the stream should be encoded.
*/
g_object_class_install_property (object_class, PROP_DEST_URI,
g_param_spec_string ("dest-uri", "URI", "URI to put output stream",
NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin:avoid-reencoding:
*
* See #encodebin:avoid-reencoding
*/
g_object_class_install_property (object_class, PROP_AVOID_REENCODING,
g_param_spec_boolean ("avoid-reencoding", "Avoid re-encoding",
"Whether to re-encode portions of compatible video streams that lay on segment boundaries",
DEFAULT_AVOID_REENCODING,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class, PROP_CPU_USAGE,
g_param_spec_uint ("cpu-usage", "cpu-usage",
"The percentage of CPU to try to use with the processus running the "
"pipeline driven by the clock", 0, 100,
100, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin:video-filter:
*
* Set the video filter element/bin to use.
*/
g_object_class_install_property (object_class, PROP_VIDEO_FILTER,
g_param_spec_object ("video-filter", "Video filter",
"the video filter(s) to apply, if possible",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin:audio-filter:
*
* Set the audio filter element/bin to use.
*/
g_object_class_install_property (object_class, PROP_AUDIO_FILTER,
g_param_spec_object ("audio-filter", "Audio filter",
"the audio filter(s) to apply, if possible",
GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstUriTranscodeBin::source-setup:
* @uritranscodebin: a #GstUriTranscodeBin
* @source: source element
*
* This signal is emitted after the source element has been created, so
* it can be configured by setting additional properties (e.g. set a
* proxy server for an http source, or set the device and read speed for
* an audio cd source). This is functionally equivalent to connecting to
* the notify::source signal, but more convenient.
*
* This signal is usually emitted from the context of a GStreamer streaming
* thread.
*
* Since: 1.20
*/
signals[SIGNAL_SOURCE_SETUP] =
g_signal_new ("source-setup", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);
/**
* GstUriTranscodeBin::element-setup:
* @uritranscodebin: a #GstUriTranscodeBin
* @element: an element that was added to the uritranscodebin hierarchy
*
* This signal is emitted when a new element is added to uritranscodebin or any of
* its sub-bins. This signal can be used to configure elements, e.g. to set
* properties on decoders. This is functionally equivalent to connecting to
* the deep-element-added signal, but more convenient.
*
* This signal is usually emitted from the context of a GStreamer streaming
* thread, so might be called at the same time as code running in the main
* application thread.
*
* Since: 1.20
*/
signals[SIGNAL_ELEMENT_SETUP] =
g_signal_new ("element-setup", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);
}
static void
gst_uri_transcode_bin_init (GstUriTranscodeBin * self)
{
self->wanted_cpu_usage = 100;
}