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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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401 lines
11 KiB
C
401 lines
11 KiB
C
/*
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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/video/videooverlay.h>
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#include <gst/video/navigation.h>
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#include "gstglsinkbin.h"
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GST_DEBUG_CATEGORY (gst_debug_gl_sink_bin);
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#define GST_CAT_DEFAULT gst_debug_gl_sink_bin
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static void gst_gl_sink_bin_finalize (GObject * object);
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static void gst_gl_sink_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * param_spec);
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static void gst_gl_sink_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * param_spec);
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static GstStateChangeReturn gst_gl_sink_bin_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_gl_sink_bin_video_overlay_init (gpointer g_iface,
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gpointer g_iface_data);
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static void gst_gl_sink_bin_navigation_interface_init (gpointer g_iface,
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gpointer g_iface_data);
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static GstStaticPadTemplate gst_gl_sink_bin_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(ANY)"));
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enum
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{
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PROP_0,
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PROP_FORCE_ASPECT_RATIO,
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PROP_SINK,
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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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SIGNAL_LAST,
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};
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static guint gst_gl_sink_bin_signals[SIGNAL_LAST] = { 0, };
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#define gst_gl_sink_bin_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLSinkBin, gst_gl_sink_bin,
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GST_TYPE_BIN, G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY,
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gst_gl_sink_bin_video_overlay_init);
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G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION,
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gst_gl_sink_bin_navigation_interface_init);
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GST_DEBUG_CATEGORY_INIT (gst_debug_gl_sink_bin, "glimagesink", 0,
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"OpenGL Video Sink Bin"));
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static void
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gst_gl_sink_bin_class_init (GstGLSinkBinClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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element_class->change_state = gst_gl_sink_bin_change_state;
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gobject_class->set_property = gst_gl_sink_bin_set_property;
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gobject_class->get_property = gst_gl_sink_bin_get_property;
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gobject_class->finalize = gst_gl_sink_bin_finalize;
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g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
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g_param_spec_boolean ("force-aspect-ratio",
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"Force aspect ratio",
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"When enabled, scaling will respect original aspect ratio", TRUE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_SINK,
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g_param_spec_object ("sink",
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"GL sink element",
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"The GL sink 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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/**
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* GstGLSinkBin::create-element:
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* @object: the #GstGLSinkBin
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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_sink_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, g_cclosure_marshal_generic,
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GST_TYPE_ELEMENT, 0);
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gst_element_class_set_metadata (element_class,
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"GL Sink Bin", "Sink/Video",
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"Infrastructure to process GL textures",
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"Matthew Waters <matthew@centricular.com>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_gl_sink_bin_template));
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}
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static void
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gst_gl_sink_bin_finalize (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_gl_sink_bin_init (GstGLSinkBin * self)
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{
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gboolean res = TRUE;
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GstPad *pad;
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self->upload = gst_element_factory_make ("glupload", NULL);
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self->convert = gst_element_factory_make ("glcolorconvert", NULL);
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res &= gst_bin_add (GST_BIN (self), self->upload);
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res &= gst_bin_add (GST_BIN (self), self->convert);
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res &= gst_element_link_pads (self->upload, "src", self->convert, "sink");
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pad = gst_element_get_static_pad (self->upload, "sink");
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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 sink pad %" GST_PTR_FORMAT, pad);
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self->sinkpad = gst_ghost_pad_new ("sink", pad);
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gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad);
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gst_object_unref (pad);
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}
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if (!res) {
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GST_WARNING_OBJECT (self, "Failed to add/connect the necessary machinery");
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}
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}
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static gboolean
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_connect_sink_element (GstGLSinkBin * self)
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{
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gboolean res = TRUE;
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gst_object_set_name (GST_OBJECT (self->sink), "sink");
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res &= gst_bin_add (GST_BIN (self), self->sink);
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res &= gst_element_link_pads (self->convert, "src", self->sink, "sink");
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if (!res)
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GST_ERROR_OBJECT (self, "Failed to link sink element into the pipeline");
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return res;
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}
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void
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gst_gl_sink_bin_finish_init_with_element (GstGLSinkBin * self,
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GstElement * element)
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{
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g_return_if_fail (GST_IS_ELEMENT (element));
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self->sink = element;
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if (!_connect_sink_element (self)) {
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gst_object_unref (self->sink);
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self->sink = NULL;
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}
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}
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void
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gst_gl_sink_bin_finish_init (GstGLSinkBin * self)
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{
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GstGLSinkBinClass *klass = GST_GL_SINK_BIN_GET_CLASS (self);
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GstElement *element = NULL;
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if (klass->create_element)
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element = klass->create_element ();
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if (element)
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gst_gl_sink_bin_finish_init_with_element (self, element);
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}
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static void
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gst_gl_sink_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (object);
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switch (prop_id) {
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case PROP_SINK:
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{
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GstElement *sink = g_value_get_object (value);
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if (self->sink)
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gst_bin_remove (GST_BIN (self), self->sink);
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self->sink = sink;
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if (sink)
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_connect_sink_element (self);
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break;
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}
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case PROP_FORCE_ASPECT_RATIO:
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if (self->sink)
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g_object_set_property (G_OBJECT (self->sink), pspec->name, value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gl_sink_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (object);
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switch (prop_id) {
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case PROP_SINK:
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g_value_set_object (value, self->sink);
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break;
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case PROP_FORCE_ASPECT_RATIO:
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if (self->sink)
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g_object_get_property (G_OBJECT (self->sink), pspec->name, value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_gl_sink_bin_change_state (GstElement * element, GstStateChange transition)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (element);
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GstGLSinkBinClass *klass = GST_GL_SINK_BIN_GET_CLASS (self);
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GST_DEBUG ("changing state: %s => %s",
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gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
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gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!self->sink) {
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if (klass->create_element)
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self->sink = klass->create_element ();
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if (!self->sink)
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g_signal_emit (element,
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gst_gl_sink_bin_signals[SIGNAL_CREATE_ELEMENT], 0, &self->sink);
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if (!self->sink) {
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GST_ERROR_OBJECT (element, "Failed to retreive element");
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return GST_STATE_CHANGE_FAILURE;
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}
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if (!_connect_sink_element (self))
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return GST_STATE_CHANGE_FAILURE;
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}
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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default:
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break;
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}
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return ret;
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}
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static void
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gst_gl_sink_bin_navigation_send_event (GstNavigation * navigation, GstStructure
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* structure)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (navigation);
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GstElement *nav =
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gst_bin_get_by_interface (GST_BIN (self), GST_TYPE_NAVIGATION);
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if (nav) {
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gst_navigation_send_event (GST_NAVIGATION (nav), structure);
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structure = NULL;
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gst_object_unref (nav);
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} else {
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GstEvent *event = gst_event_new_navigation (structure);
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structure = NULL;
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gst_element_send_event (GST_ELEMENT (self), event);
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}
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}
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static void
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gst_gl_sink_bin_navigation_interface_init (gpointer g_iface,
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gpointer g_iface_data)
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{
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GstNavigationInterface *iface = (GstNavigationInterface *) g_iface;
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iface->send_event = gst_gl_sink_bin_navigation_send_event;
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}
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static void
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gst_gl_sink_bin_overlay_expose (GstVideoOverlay * overlay)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (overlay);
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GstVideoOverlay *overlay_element = NULL;
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overlay_element =
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GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self),
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GST_TYPE_VIDEO_OVERLAY));
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if (overlay_element) {
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gst_video_overlay_expose (overlay_element);
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gst_object_unref (overlay_element);
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}
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}
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static void
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gst_gl_sink_bin_overlay_handle_events (GstVideoOverlay * overlay,
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gboolean handle_events)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (overlay);
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GstVideoOverlay *overlay_element = NULL;
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overlay_element =
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GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self),
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GST_TYPE_VIDEO_OVERLAY));
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if (overlay_element) {
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gst_video_overlay_handle_events (overlay_element, handle_events);
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gst_object_unref (overlay_element);
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}
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}
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static void
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gst_gl_sink_bin_overlay_set_render_rectangle (GstVideoOverlay * overlay, gint x,
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gint y, gint width, gint height)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (overlay);
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GstVideoOverlay *overlay_element = NULL;
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overlay_element =
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GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self),
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GST_TYPE_VIDEO_OVERLAY));
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if (overlay_element) {
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gst_video_overlay_set_render_rectangle (overlay_element, x, y, width,
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height);
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gst_object_unref (overlay_element);
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}
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}
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static void
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gst_gl_sink_bin_overlay_set_window_handle (GstVideoOverlay * overlay,
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guintptr handle)
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{
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GstGLSinkBin *self = GST_GL_SINK_BIN (overlay);
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GstVideoOverlay *overlay_element = NULL;
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overlay_element =
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GST_VIDEO_OVERLAY (gst_bin_get_by_interface (GST_BIN (self),
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GST_TYPE_VIDEO_OVERLAY));
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if (overlay_element) {
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gst_video_overlay_set_window_handle (overlay_element, handle);
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gst_object_unref (overlay_element);
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}
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}
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static void
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gst_gl_sink_bin_video_overlay_init (gpointer g_iface, gpointer g_iface_data)
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{
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GstVideoOverlayInterface *iface = (GstVideoOverlayInterface *) g_iface;
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iface->expose = gst_gl_sink_bin_overlay_expose;
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iface->handle_events = gst_gl_sink_bin_overlay_handle_events;
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iface->set_render_rectangle = gst_gl_sink_bin_overlay_set_render_rectangle;
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iface->set_window_handle = gst_gl_sink_bin_overlay_set_window_handle;
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}
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