| /* |
| * GStreamer |
| * Copyright (C) 2015 Matthew Waters <matthew@centricular.com> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "gstglfilterbin.h" |
| |
| #define GST_CAT_DEFAULT gst_gl_filter_bin_debug |
| GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); |
| |
| /* Properties */ |
| enum |
| { |
| PROP_0, |
| PROP_FILTER, |
| }; |
| |
| enum |
| { |
| SIGNAL_0, |
| SIGNAL_CREATE_ELEMENT, |
| LAST_SIGNAL |
| }; |
| |
| static guint gst_gl_filter_bin_signals[LAST_SIGNAL] = { 0 }; |
| |
| #define gst_gl_filter_bin_parent_class parent_class |
| G_DEFINE_TYPE_WITH_CODE (GstGLFilterBin, gst_gl_filter_bin, |
| GST_TYPE_BIN, GST_DEBUG_CATEGORY_INIT (gst_gl_filter_bin_debug, |
| "glfilterbin", 0, "glfilterbin element");); |
| |
| static void gst_gl_filter_bin_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec); |
| static void gst_gl_filter_bin_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec); |
| |
| static GstStateChangeReturn gst_gl_filter_bin_change_state (GstElement * |
| element, GstStateChange transition); |
| |
| static GstStaticPadTemplate _src_pad_template = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("video/x-raw(ANY)")); |
| |
| static void |
| gst_gl_filter_bin_class_init (GstGLFilterBinClass * klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
| GstCaps *upload_caps; |
| |
| element_class->change_state = gst_gl_filter_bin_change_state; |
| |
| gobject_class->set_property = gst_gl_filter_bin_set_property; |
| gobject_class->get_property = gst_gl_filter_bin_get_property; |
| |
| gst_element_class_add_static_pad_template (element_class, &_src_pad_template); |
| |
| upload_caps = gst_gl_upload_get_input_template_caps (); |
| gst_element_class_add_pad_template (element_class, |
| gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps)); |
| gst_caps_unref (upload_caps); |
| |
| g_object_class_install_property (gobject_class, PROP_FILTER, |
| g_param_spec_object ("filter", |
| "GL filter element", |
| "The GL filter chain to use", |
| GST_TYPE_ELEMENT, |
| GST_PARAM_MUTABLE_READY | G_PARAM_READWRITE | |
| G_PARAM_STATIC_STRINGS)); |
| |
| /** |
| * GstFilterBin::create-element: |
| * @object: the #GstGLFilterBin |
| * |
| * Will be emitted when we need the processing element/s that this bin will use |
| * |
| * Returns: a new #GstElement |
| */ |
| gst_gl_filter_bin_signals[SIGNAL_CREATE_ELEMENT] = |
| g_signal_new ("create-element", G_TYPE_FROM_CLASS (klass), |
| G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_generic, |
| GST_TYPE_ELEMENT, 0); |
| |
| gst_element_class_set_metadata (element_class, |
| "GL Filter Bin", "Filter/Video", |
| "Infrastructure to process GL textures", |
| "Matthew Waters <matthew@centricular.com>"); |
| } |
| |
| static void |
| gst_gl_filter_bin_init (GstGLFilterBin * self) |
| { |
| GstPad *pad; |
| |
| self->upload = gst_element_factory_make ("glupload", NULL); |
| self->in_convert = gst_element_factory_make ("glcolorconvert", NULL); |
| self->out_convert = gst_element_factory_make ("glcolorconvert", NULL); |
| self->download = gst_element_factory_make ("gldownload", NULL); |
| |
| gst_bin_add (GST_BIN (self), self->upload); |
| gst_bin_add (GST_BIN (self), self->in_convert); |
| gst_bin_add (GST_BIN (self), self->out_convert); |
| gst_bin_add (GST_BIN (self), self->download); |
| |
| gst_element_link_pads (self->upload, "src", self->in_convert, "sink"); |
| gst_element_link_pads (self->out_convert, "src", self->download, "sink"); |
| |
| pad = gst_element_get_static_pad (self->download, "src"); |
| if (pad) { |
| GST_DEBUG_OBJECT (self, "setting target src pad %" GST_PTR_FORMAT, pad); |
| self->srcpad = gst_ghost_pad_new ("src", pad); |
| gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad); |
| gst_object_unref (pad); |
| } |
| |
| pad = gst_element_get_static_pad (self->upload, "sink"); |
| if (pad) { |
| GST_DEBUG_OBJECT (self, "setting target sink pad %" GST_PTR_FORMAT, pad); |
| self->sinkpad = gst_ghost_pad_new ("sink", pad); |
| gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad); |
| gst_object_unref (pad); |
| } |
| } |
| |
| static gboolean |
| _connect_filter_element (GstGLFilterBin * self) |
| { |
| gboolean res = TRUE; |
| |
| gst_object_set_name (GST_OBJECT (self->filter), "filter"); |
| res &= gst_bin_add (GST_BIN (self), self->filter); |
| |
| res &= gst_element_link_pads (self->in_convert, "src", self->filter, "sink"); |
| res &= gst_element_link_pads (self->filter, "src", self->out_convert, "sink"); |
| |
| if (!res) |
| GST_ERROR_OBJECT (self, "Failed to link filter element into the pipeline"); |
| |
| return res; |
| } |
| |
| void |
| gst_gl_filter_bin_finish_init_with_element (GstGLFilterBin * self, |
| GstElement * element) |
| { |
| g_return_if_fail (GST_IS_ELEMENT (element)); |
| |
| self->filter = element; |
| |
| if (!_connect_filter_element (self)) { |
| gst_object_unref (self->filter); |
| self->filter = NULL; |
| } |
| } |
| |
| void |
| gst_gl_filter_bin_finish_init (GstGLFilterBin * self) |
| { |
| GstGLFilterBinClass *klass = GST_GL_FILTER_BIN_GET_CLASS (self); |
| GstElement *element = NULL; |
| |
| if (klass->create_element) |
| element = klass->create_element (); |
| |
| if (element) |
| gst_gl_filter_bin_finish_init_with_element (self, element); |
| } |
| |
| static void |
| gst_gl_filter_bin_get_property (GObject * object, guint prop_id, |
| GValue * value, GParamSpec * pspec) |
| { |
| GstGLFilterBin *self = GST_GL_FILTER_BIN (object); |
| |
| switch (prop_id) { |
| case PROP_FILTER: |
| g_value_set_object (value, self->filter); |
| break; |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static void |
| gst_gl_filter_bin_set_property (GObject * object, guint prop_id, |
| const GValue * value, GParamSpec * pspec) |
| { |
| GstGLFilterBin *self = GST_GL_FILTER_BIN (object); |
| |
| switch (prop_id) { |
| case PROP_FILTER: |
| { |
| GstElement *filter = g_value_get_object (value); |
| if (self->filter) |
| gst_bin_remove (GST_BIN (self), self->filter); |
| self->filter = filter; |
| if (filter) { |
| gst_object_ref_sink (filter); |
| _connect_filter_element (self); |
| } |
| break; |
| } |
| default: |
| G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| break; |
| } |
| } |
| |
| static GstStateChangeReturn |
| gst_gl_filter_bin_change_state (GstElement * element, GstStateChange transition) |
| { |
| GstGLFilterBin *self = GST_GL_FILTER_BIN (element); |
| GstGLFilterBinClass *klass = GST_GL_FILTER_BIN_GET_CLASS (self); |
| GstStateChangeReturn ret; |
| |
| switch (transition) { |
| case GST_STATE_CHANGE_NULL_TO_READY: |
| if (!self->filter) { |
| if (klass->create_element) |
| self->filter = klass->create_element (); |
| |
| if (!self->filter) |
| g_signal_emit (element, |
| gst_gl_filter_bin_signals[SIGNAL_CREATE_ELEMENT], 0, |
| &self->filter); |
| |
| if (!self->filter) { |
| GST_ERROR_OBJECT (element, "Failed to retrieve element"); |
| return GST_STATE_CHANGE_FAILURE; |
| } |
| if (!_connect_filter_element (self)) |
| return GST_STATE_CHANGE_FAILURE; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| if (ret == GST_STATE_CHANGE_FAILURE) |
| return ret; |
| |
| switch (transition) { |
| default: |
| break; |
| } |
| |
| return ret; |
| } |