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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Proxy the force-live and min-upstream-latency propertyies to the internal glvideomixerelement at construction time. force-live has to be set during construction of the glvideomixerelement, so that has to be deferred until the _constructed() call. Make sure that all other existing proxied properties will still get set once the element is created. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4494>
720 lines
22 KiB
C
720 lines
22 KiB
C
/*
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*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gst/gst.h>
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#include "gstglelements.h"
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#include "gstglmixerbin.h"
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#define GST_CAT_DEFAULT gst_gl_mixer_bin_debug
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GST_DEBUG_CATEGORY (gst_gl_mixer_bin_debug);
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#define DEFAULT_FORCE_LIVE FALSE
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#define DEFAULT_LATENCY 0
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#define DEFAULT_START_TIME_SELECTION 0
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#define DEFAULT_START_TIME (-1)
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#define DEFAULT_MIN_UPSTREAM_LATENCY (0)
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typedef enum
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{
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GST_GL_MIXER_BIN_START_TIME_SELECTION_ZERO,
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GST_GL_MIXER_BIN_START_TIME_SELECTION_FIRST,
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GST_GL_MIXER_BIN_START_TIME_SELECTION_SET
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} GstGLMixerBinStartTimeSelection;
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#define GST_TYPE_GL_MIXER_BIN_START_TIME_SELECTION (gst_gl_mixer_bin_start_time_selection_get_type())
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static GType
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gst_gl_mixer_bin_start_time_selection_get_type (void)
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{
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static GType gtype = 0;
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if (gtype == 0) {
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static const GEnumValue values[] = {
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{GST_GL_MIXER_BIN_START_TIME_SELECTION_ZERO,
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"Start at 0 running time (default)", "zero"},
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{GST_GL_MIXER_BIN_START_TIME_SELECTION_FIRST,
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"Start at first observed input running time", "first"},
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{GST_GL_MIXER_BIN_START_TIME_SELECTION_SET,
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"Set start time with start-time property", "set"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstGLMixerBinStartTimeSelection", values);
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}
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return gtype;
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}
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struct input_chain
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{
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GstGLMixerBin *self;
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GstGhostPad *ghost_pad;
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GstElement *upload;
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GstElement *in_convert;
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GstElement *in_overlay;
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GstPad *mixer_pad;
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};
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static void
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_free_input_chain (struct input_chain *chain)
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{
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if (!chain)
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return;
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chain->ghost_pad = NULL;
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if (chain->upload) {
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gst_element_set_state (chain->upload, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (chain->self), chain->upload);
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chain->upload = NULL;
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}
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if (chain->in_convert) {
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gst_element_set_state (chain->in_convert, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (chain->self), chain->in_convert);
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chain->in_convert = NULL;
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}
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if (chain->in_overlay) {
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gst_element_set_state (chain->in_overlay, GST_STATE_NULL);
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gst_bin_remove (GST_BIN (chain->self), chain->in_overlay);
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chain->in_overlay = NULL;
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}
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if (chain->mixer_pad) {
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gst_element_release_request_pad (chain->self->mixer, chain->mixer_pad);
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gst_object_unref (chain->mixer_pad);
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chain->mixer_pad = NULL;
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}
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g_free (chain);
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}
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struct _GstGLMixerBinPrivate
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{
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gboolean running;
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GList *input_chains;
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};
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enum
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{
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PROP_0,
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PROP_MIXER,
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PROP_LATENCY,
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PROP_START_TIME_SELECTION,
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PROP_START_TIME,
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PROP_CONTEXT,
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PROP_FORCE_LIVE,
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PROP_MIN_UPSTREAM_LATENCY,
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};
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enum
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{
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SIGNAL_0,
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SIGNAL_CREATE_ELEMENT,
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LAST_SIGNAL
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};
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static void gst_gl_mixer_bin_child_proxy_init (gpointer g_iface,
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gpointer iface_data);
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G_DEFINE_TYPE_WITH_CODE (GstGLMixerBin, gst_gl_mixer_bin, GST_TYPE_BIN,
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G_ADD_PRIVATE (GstGLMixerBin)
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G_IMPLEMENT_INTERFACE (GST_TYPE_CHILD_PROXY,
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gst_gl_mixer_bin_child_proxy_init));
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (glmixerbin, "glmixerbin",
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GST_RANK_NONE, GST_TYPE_GL_MIXER_BIN, gl_element_init (plugin));
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static guint gst_gl_mixer_bin_signals[LAST_SIGNAL] = { 0 };
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(ANY)")
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);
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static void gst_gl_mixer_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_mixer_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_gl_mixer_bin_dispose (GObject * object);
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static GstPad *gst_gl_mixer_bin_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * req_name, const GstCaps * caps);
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static void gst_gl_mixer_bin_release_pad (GstElement * element, GstPad * pad);
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static GstStateChangeReturn gst_gl_mixer_bin_change_state (GstElement *
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element, GstStateChange transition);
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static void
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gst_gl_mixer_bin_class_init (GstGLMixerBinClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstCaps *upload_caps;
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "glmixerbin", 0,
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"opengl mixer bin");
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element_class->request_new_pad = gst_gl_mixer_bin_request_new_pad;
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element_class->release_pad = gst_gl_mixer_bin_release_pad;
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element_class->change_state = gst_gl_mixer_bin_change_state;
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gobject_class->get_property = gst_gl_mixer_bin_get_property;
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gobject_class->set_property = gst_gl_mixer_bin_set_property;
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_gl_mixer_bin_dispose);
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g_object_class_install_property (gobject_class, PROP_MIXER,
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g_param_spec_object ("mixer",
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"GL mixer element",
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"The GL mixer chain to use",
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GST_TYPE_ELEMENT,
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GST_PARAM_MUTABLE_READY | G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_LATENCY,
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g_param_spec_uint64 ("latency", "Buffer latency",
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"Additional latency in live mode to allow upstream "
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"to take longer to produce buffers for the current "
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"position (in nanoseconds)", 0, G_MAXUINT64,
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DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_START_TIME_SELECTION,
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g_param_spec_enum ("start-time-selection", "Start Time Selection",
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"Decides which start time is output",
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GST_TYPE_GL_MIXER_BIN_START_TIME_SELECTION,
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DEFAULT_START_TIME_SELECTION,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_START_TIME,
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g_param_spec_uint64 ("start-time", "Start Time",
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"Start time to use if start-time-selection=set", 0,
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G_MAXUINT64,
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DEFAULT_START_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_CONTEXT,
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g_param_spec_object ("context",
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"OpenGL context",
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"Get OpenGL context",
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GST_TYPE_GL_CONTEXT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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/**
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* GstGLMixerBin:force-live:
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*
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* Causes the element to aggregate on a timeout even when no live source is
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* connected to its sinks. See #GstGLMixerBin:min-upstream-latency for a
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* companion property: in the vast majority of cases where you plan to plug in
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* live sources with a non-zero latency, you should set it to a non-zero value.
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*
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* Since: 1.24
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*/
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g_object_class_install_property (gobject_class, PROP_FORCE_LIVE,
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g_param_spec_boolean ("force-live",
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"Force Live",
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"Always operate in live mode and aggregate on timeout regardless of whether any live sources are linked upstream",
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DEFAULT_FORCE_LIVE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | G_PARAM_CONSTRUCT_ONLY));
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/**
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* GstGLMixerBin:min-upstream-latency:
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*
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* Force minimum upstream latency (in nanoseconds). When sources with a
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* higher latency are expected to be plugged in dynamically after the
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* aggregator has started playing, this allows overriding the minimum
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* latency reported by the initial source(s). This is only taken into
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* account when larger than the actually reported minimum latency.
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*
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* Since: 1.24
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*/
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g_object_class_install_property (gobject_class, PROP_MIN_UPSTREAM_LATENCY,
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g_param_spec_uint64 ("min-upstream-latency", "Buffer latency",
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"When sources with a higher latency are expected to be plugged "
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"in dynamically after the aggregator has started playing, "
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"this allows overriding the minimum latency reported by the "
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"initial source(s). This is only taken into account when larger "
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"than the actually reported minimum latency. (nanoseconds)",
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0, G_MAXUINT64,
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DEFAULT_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstMixerBin::create-element:
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* @object: the #GstGLMixerBin
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*
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* Will be emitted when we need the processing element/s that this bin will use
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*
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* Returns: a new #GstElement
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*/
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gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT] =
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g_signal_new ("create-element", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, GST_TYPE_ELEMENT, 0);
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gst_element_class_add_static_pad_template (element_class, &src_factory);
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upload_caps = gst_gl_upload_get_input_template_caps ();
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gst_element_class_add_pad_template (element_class,
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gst_pad_template_new ("sink_%u", GST_PAD_SINK, GST_PAD_REQUEST,
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upload_caps));
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gst_caps_unref (upload_caps);
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gst_element_class_set_metadata (element_class, "OpenGL video_mixer empty bin",
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"Bin/Filter/Effect/Video/Mixer", "OpenGL video_mixer empty bin",
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"Matthew Waters <matthew@centricular.com>");
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gst_type_mark_as_plugin_api (GST_TYPE_GL_MIXER_BIN_START_TIME_SELECTION, 0);
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}
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static void
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gst_gl_mixer_bin_init (GstGLMixerBin * self)
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{
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gboolean res = TRUE;
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GstPad *pad;
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self->priv = gst_gl_mixer_bin_get_instance_private (self);
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self->out_convert = gst_element_factory_make ("glcolorconvert", NULL);
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self->download = gst_element_factory_make ("gldownload", NULL);
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res &= gst_bin_add (GST_BIN (self), self->out_convert);
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res &= gst_bin_add (GST_BIN (self), self->download);
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res &=
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gst_element_link_pads (self->out_convert, "src", self->download, "sink");
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pad = gst_element_get_static_pad (self->download, "src");
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if (!pad) {
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res = FALSE;
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} else {
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GST_DEBUG_OBJECT (self, "setting target src pad %" GST_PTR_FORMAT, pad);
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self->srcpad = gst_ghost_pad_new ("src", pad);
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gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
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gst_object_unref (pad);
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}
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if (!res)
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GST_ERROR_OBJECT (self, "failed to create output chain");
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self->force_live = DEFAULT_FORCE_LIVE;
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self->latency = DEFAULT_LATENCY;
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self->start_time_selection = DEFAULT_START_TIME_SELECTION;
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self->start_time = DEFAULT_START_TIME;
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self->min_upstream_latency = DEFAULT_MIN_UPSTREAM_LATENCY;
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}
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static void
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gst_gl_mixer_bin_dispose (GObject * object)
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{
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GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
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GList *l = self->priv->input_chains;
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while (l) {
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struct input_chain *chain = l->data;
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if (self->mixer && chain->mixer_pad) {
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gst_element_release_request_pad (GST_ELEMENT (self->mixer),
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chain->mixer_pad);
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gst_object_unref (chain->mixer_pad);
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chain->mixer_pad = NULL;
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}
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l = l->next;
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}
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g_list_free_full (self->priv->input_chains, (GDestroyNotify) g_free);
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G_OBJECT_CLASS (gst_gl_mixer_bin_parent_class)->dispose (object);
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}
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static gboolean
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_create_input_chain (GstGLMixerBin * self, struct input_chain *chain,
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GstPad * mixer_pad)
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{
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GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
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GstPad *pad;
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gboolean res = TRUE;
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gchar *name;
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chain->self = self;
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chain->mixer_pad = mixer_pad;
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chain->upload = gst_element_factory_make ("glupload", NULL);
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chain->in_convert = gst_element_factory_make ("glcolorconvert", NULL);
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chain->in_overlay = gst_element_factory_make ("gloverlaycompositor", NULL);
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res &= gst_bin_add (GST_BIN (self), chain->in_convert);
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res &= gst_bin_add (GST_BIN (self), chain->in_overlay);
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res &= gst_bin_add (GST_BIN (self), chain->upload);
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if (!res) {
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g_warn_if_reached ();
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return FALSE;
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}
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pad = gst_element_get_static_pad (chain->in_overlay, "src");
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if (gst_pad_link (pad, mixer_pad) != GST_PAD_LINK_OK) {
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gst_object_unref (pad);
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return FALSE;
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}
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gst_object_unref (pad);
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if (!gst_element_link_pads (chain->in_convert, "src", chain->in_overlay,
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"sink")) {
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g_warn_if_reached ();
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return FALSE;
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}
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if (!gst_element_link_pads (chain->upload, "src", chain->in_convert, "sink")) {
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g_warn_if_reached ();
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return FALSE;
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}
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pad = gst_element_get_static_pad (chain->upload, "sink");
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if (!pad) {
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return FALSE;
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} else {
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GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad);
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name = gst_object_get_name (GST_OBJECT (mixer_pad));
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if (klass->create_input_pad) {
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chain->ghost_pad = klass->create_input_pad (self, chain->mixer_pad);
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gst_object_set_name (GST_OBJECT (chain->ghost_pad), name);
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gst_ghost_pad_set_target (chain->ghost_pad, pad);
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} else {
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chain->ghost_pad =
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GST_GHOST_PAD (gst_ghost_pad_new (GST_PAD_NAME (chain->mixer_pad),
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pad));
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}
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g_free (name);
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GST_OBJECT_LOCK (self);
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if (self->priv->running)
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gst_pad_set_active (GST_PAD (chain->ghost_pad), TRUE);
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GST_OBJECT_UNLOCK (self);
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gst_element_add_pad (GST_ELEMENT_CAST (self), GST_PAD (chain->ghost_pad));
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gst_object_unref (pad);
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}
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gst_element_sync_state_with_parent (chain->upload);
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gst_element_sync_state_with_parent (chain->in_convert);
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gst_element_sync_state_with_parent (chain->in_overlay);
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return TRUE;
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}
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static GstPadTemplate *
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_find_element_pad_template (GstElement * element,
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GstPadDirection direction, GstPadPresence presence)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
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GList *templ_list = gst_element_class_get_pad_template_list (klass);
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/* find suitable template */
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while (templ_list) {
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GstPadTemplate *templ = (GstPadTemplate *) templ_list->data;
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if (GST_PAD_TEMPLATE_DIRECTION (templ) == direction
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&& GST_PAD_TEMPLATE_PRESENCE (templ) == presence) {
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return templ;
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}
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templ_list = templ_list->next;
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}
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return NULL;
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}
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static gboolean
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_connect_mixer_element (GstGLMixerBin * self)
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{
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gboolean res = TRUE;
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g_return_val_if_fail (self->priv->input_chains == NULL, FALSE);
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gst_object_set_name (GST_OBJECT (self->mixer), "mixer");
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res &= gst_bin_add (GST_BIN (self), self->mixer);
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|
res &= gst_element_link_pads (self->mixer, "src", self->out_convert, "sink");
|
|
|
|
if (!res)
|
|
GST_ERROR_OBJECT (self, "Failed to link mixer element into the pipeline");
|
|
|
|
gst_element_sync_state_with_parent (self->mixer);
|
|
|
|
return res;
|
|
}
|
|
|
|
void
|
|
gst_gl_mixer_bin_finish_init_with_element (GstGLMixerBin * self,
|
|
GstElement * element)
|
|
{
|
|
g_return_if_fail (GST_IS_ELEMENT (element));
|
|
|
|
self->mixer = element;
|
|
|
|
if (!_connect_mixer_element (self)) {
|
|
gst_object_unref (self->mixer);
|
|
self->mixer = NULL;
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_gl_mixer_bin_finish_init (GstGLMixerBin * self)
|
|
{
|
|
GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
|
|
GstElement *element = NULL;
|
|
|
|
if (klass->create_element)
|
|
element = klass->create_element ();
|
|
|
|
if (element)
|
|
gst_gl_mixer_bin_finish_init_with_element (self, element);
|
|
}
|
|
|
|
static void
|
|
gst_gl_mixer_bin_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_MIXER:
|
|
g_value_set_object (value, self->mixer);
|
|
break;
|
|
case PROP_FORCE_LIVE:
|
|
g_value_set_boolean (value, self->force_live);
|
|
break;
|
|
default:
|
|
if (self->mixer)
|
|
g_object_get_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_gl_mixer_bin_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstGLMixerBin *self = GST_GL_MIXER_BIN (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_MIXER:
|
|
{
|
|
GstElement *mixer = g_value_get_object (value);
|
|
/* FIXME: deal with replacing a mixer */
|
|
g_return_if_fail (!self->mixer || (self->mixer == mixer));
|
|
self->mixer = mixer;
|
|
if (mixer) {
|
|
gst_object_ref_sink (mixer);
|
|
_connect_mixer_element (self);
|
|
}
|
|
break;
|
|
}
|
|
case PROP_FORCE_LIVE:
|
|
self->force_live = g_value_get_boolean (value);
|
|
break;
|
|
case PROP_LATENCY:
|
|
self->latency = g_value_get_uint64 (value);
|
|
if (self->mixer)
|
|
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
case PROP_START_TIME_SELECTION:
|
|
self->start_time_selection = g_value_get_uint (value);
|
|
if (self->mixer)
|
|
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
case PROP_START_TIME:
|
|
self->start_time = g_value_get_uint64 (value);
|
|
if (self->mixer)
|
|
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
case PROP_MIN_UPSTREAM_LATENCY:
|
|
self->min_upstream_latency = g_value_get_uint64 (value);
|
|
if (self->mixer)
|
|
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
default:
|
|
if (self->mixer)
|
|
g_object_set_property (G_OBJECT (self->mixer), pspec->name, value);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GstPad *
|
|
gst_gl_mixer_bin_request_new_pad (GstElement * element, GstPadTemplate * templ,
|
|
const gchar * req_name, const GstCaps * caps)
|
|
{
|
|
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
|
|
GstPadTemplate *mixer_templ;
|
|
struct input_chain *chain;
|
|
GstPad *mixer_pad;
|
|
|
|
chain = g_new0 (struct input_chain, 1);
|
|
|
|
mixer_templ = _find_element_pad_template (self->mixer,
|
|
GST_PAD_TEMPLATE_DIRECTION (templ), GST_PAD_TEMPLATE_PRESENCE (templ));
|
|
g_return_val_if_fail (mixer_templ, NULL);
|
|
|
|
mixer_pad =
|
|
gst_element_request_pad (self->mixer, mixer_templ, req_name, NULL);
|
|
g_return_val_if_fail (mixer_pad, NULL);
|
|
|
|
if (!_create_input_chain (self, chain, mixer_pad)) {
|
|
gst_element_release_request_pad (self->mixer, mixer_pad);
|
|
_free_input_chain (chain);
|
|
return NULL;
|
|
}
|
|
|
|
GST_OBJECT_LOCK (element);
|
|
self->priv->input_chains = g_list_prepend (self->priv->input_chains, chain);
|
|
GST_OBJECT_UNLOCK (element);
|
|
|
|
gst_child_proxy_child_added (GST_CHILD_PROXY (self),
|
|
G_OBJECT (chain->ghost_pad), GST_OBJECT_NAME (chain->ghost_pad));
|
|
|
|
return GST_PAD (chain->ghost_pad);
|
|
}
|
|
|
|
static void
|
|
gst_gl_mixer_bin_release_pad (GstElement * element, GstPad * pad)
|
|
{
|
|
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
|
|
GList *l = self->priv->input_chains;
|
|
gboolean released = FALSE;
|
|
|
|
GST_OBJECT_LOCK (element);
|
|
while (l) {
|
|
struct input_chain *chain = l->data;
|
|
if (GST_PAD (chain->ghost_pad) == pad) {
|
|
self->priv->input_chains =
|
|
g_list_delete_link (self->priv->input_chains, l);
|
|
GST_OBJECT_UNLOCK (element);
|
|
|
|
_free_input_chain (chain);
|
|
gst_element_remove_pad (element, pad);
|
|
released = TRUE;
|
|
break;
|
|
}
|
|
l = l->next;
|
|
}
|
|
if (!released)
|
|
GST_OBJECT_UNLOCK (element);
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_gl_mixer_bin_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstGLMixerBin *self = GST_GL_MIXER_BIN (element);
|
|
GstGLMixerBinClass *klass = GST_GL_MIXER_BIN_GET_CLASS (self);
|
|
GstStateChangeReturn ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
GST_OBJECT_LOCK (element);
|
|
if (!self->mixer) {
|
|
if (klass->create_element)
|
|
self->mixer = klass->create_element ();
|
|
|
|
if (!self->mixer)
|
|
g_signal_emit (element,
|
|
gst_gl_mixer_bin_signals[SIGNAL_CREATE_ELEMENT], 0, &self->mixer);
|
|
|
|
if (!self->mixer) {
|
|
GST_ERROR_OBJECT (element, "Failed to retrieve element");
|
|
GST_OBJECT_UNLOCK (element);
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
}
|
|
GST_OBJECT_UNLOCK (element);
|
|
if (!_connect_mixer_element (self))
|
|
return GST_STATE_CHANGE_FAILURE;
|
|
|
|
GST_OBJECT_LOCK (element);
|
|
}
|
|
self->priv->running = TRUE;
|
|
GST_OBJECT_UNLOCK (element);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret =
|
|
GST_ELEMENT_CLASS (gst_gl_mixer_bin_parent_class)->change_state (element,
|
|
transition);
|
|
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
GST_OBJECT_LOCK (self);
|
|
self->priv->running = FALSE;
|
|
GST_OBJECT_UNLOCK (self);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GObject *
|
|
gst_gl_mixer_bin_child_proxy_get_child_by_index (GstChildProxy * child_proxy,
|
|
guint index)
|
|
{
|
|
GstGLMixerBin *mixer = GST_GL_MIXER_BIN (child_proxy);
|
|
GstBin *bin = GST_BIN_CAST (child_proxy);
|
|
GObject *res = NULL;
|
|
|
|
GST_OBJECT_LOCK (bin);
|
|
/* XXX: not exactly thread safe with ordering */
|
|
if (index < bin->numchildren) {
|
|
if ((res = g_list_nth_data (bin->children, index)))
|
|
gst_object_ref (res);
|
|
} else {
|
|
struct input_chain *chain;
|
|
if ((chain =
|
|
g_list_nth_data (mixer->priv->input_chains,
|
|
index - bin->numchildren))) {
|
|
res = gst_object_ref (chain->ghost_pad);
|
|
}
|
|
}
|
|
GST_OBJECT_UNLOCK (bin);
|
|
|
|
return res;
|
|
}
|
|
|
|
static guint
|
|
gst_gl_mixer_bin_child_proxy_get_children_count (GstChildProxy * child_proxy)
|
|
{
|
|
GstGLMixerBin *mixer = GST_GL_MIXER_BIN (child_proxy);
|
|
GstBin *bin = GST_BIN_CAST (child_proxy);
|
|
guint num;
|
|
|
|
GST_OBJECT_LOCK (bin);
|
|
num = bin->numchildren + g_list_length (mixer->priv->input_chains);
|
|
GST_OBJECT_UNLOCK (bin);
|
|
|
|
return num;
|
|
}
|
|
|
|
static void
|
|
gst_gl_mixer_bin_child_proxy_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstChildProxyInterface *iface = g_iface;
|
|
|
|
iface->get_children_count = gst_gl_mixer_bin_child_proxy_get_children_count;
|
|
iface->get_child_by_index = gst_gl_mixer_bin_child_proxy_get_child_by_index;
|
|
}
|