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7fe908bc02
It encapsulates a confiurable GL processing element in the upload/colorconvert/download dance required to transparently process the majority of GstBuffer's.
287 lines
8.2 KiB
C
287 lines
8.2 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 "gstglfilterbin.h"
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#define GST_CAT_DEFAULT gst_gl_filter_bin_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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/* Properties */
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enum
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{
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PROP_0,
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PROP_FILTER,
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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 guint gst_gl_filter_bin_signals[LAST_SIGNAL] = { 0 };
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#define gst_gl_filter_bin_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLFilterBin, gst_gl_filter_bin,
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GST_TYPE_BIN, GST_DEBUG_CATEGORY_INIT (gst_gl_filter_bin_debug,
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"glfilterbin", 0, "glfilterbin element"););
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static void gst_gl_filter_bin_finalize (GObject * object);
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static void gst_gl_filter_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_gl_filter_bin_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_gl_filter_bin_change_state (GstElement *
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element, GstStateChange transition);
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static GstStaticPadTemplate _src_pad_template = 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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static GstStaticPadTemplate _sink_pad_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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static void
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gst_gl_filter_bin_class_init (GstGLFilterBinClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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printf ("bin class_init klass %p\n", klass);
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element_class->change_state = gst_gl_filter_bin_change_state;
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gobject_class->set_property = gst_gl_filter_bin_set_property;
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gobject_class->get_property = gst_gl_filter_bin_get_property;
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gobject_class->finalize = gst_gl_filter_bin_finalize;
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&_src_pad_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&_sink_pad_template));
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g_object_class_install_property (gobject_class, PROP_FILTER,
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g_param_spec_object ("filter",
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"GL filter element",
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"The GL filter 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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* GstFilterBin::create-element:
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* @object: the #GstGLFilterBin
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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_filter_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 Filter Bin", "Filter/Video",
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"Infrastructure to process GL textures",
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"Matthew Waters <matthew@centricular.com>");
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}
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static void
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gst_gl_filter_bin_init (GstGLFilterBin * 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->in_convert = gst_element_factory_make ("glcolorconvert", NULL);
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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->upload);
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res &= gst_bin_add (GST_BIN (self), self->in_convert);
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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 &= gst_element_link_pads (self->upload, "src", self->in_convert, "sink");
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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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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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}
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static gboolean
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_connect_filter_element (GstGLFilterBin * self)
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{
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gboolean res = TRUE;
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gst_object_set_name (GST_OBJECT (self->filter), "filter");
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res &= gst_bin_add (GST_BIN (self), self->filter);
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res &= gst_element_link_pads (self->in_convert, "src", self->filter, "sink");
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res &= gst_element_link_pads (self->filter, "src", self->out_convert, "sink");
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if (!res)
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GST_ERROR_OBJECT (self, "Failed to link filter 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_filter_bin_finish_init_with_element (GstGLFilterBin * 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->filter = element;
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if (!_connect_filter_element (self)) {
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gst_object_unref (self->filter);
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self->filter = NULL;
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}
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}
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void
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gst_gl_filter_bin_finish_init (GstGLFilterBin * self)
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{
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GstGLFilterBinClass *klass = GST_GL_FILTER_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_filter_bin_finish_init_with_element (self, element);
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}
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static void
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gst_gl_filter_bin_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstGLFilterBin *self = GST_GL_FILTER_BIN (object);
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switch (prop_id) {
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case PROP_FILTER:
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g_value_set_object (value, self->filter);
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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_filter_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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GstGLFilterBin *self = GST_GL_FILTER_BIN (object);
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switch (prop_id) {
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case PROP_FILTER:
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{
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GstElement *filter = g_value_get_object (value);
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if (self->filter)
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gst_bin_remove (GST_BIN (self), self->filter);
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self->filter = filter;
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if (filter)
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_connect_filter_element (self);
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break;
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}
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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_filter_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 GstStateChangeReturn
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gst_gl_filter_bin_change_state (GstElement * element, GstStateChange transition)
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{
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GstGLFilterBin *self = GST_GL_FILTER_BIN (element);
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GstGLFilterBinClass *klass = GST_GL_FILTER_BIN_GET_CLASS (self);
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GstStateChangeReturn ret;
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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if (!self->filter) {
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if (klass->create_element)
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self->filter = klass->create_element ();
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if (!self->filter)
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g_signal_emit (element,
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gst_gl_filter_bin_signals[SIGNAL_CREATE_ELEMENT], 0,
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&self->filter);
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if (!self->filter) {
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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_filter_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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