blob: 397db73005304d89a78c60213f43cbe6c14405b2 [file] [log] [blame]
/*
* 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_pad_template (element_class,
gst_static_pad_template_get (&_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)
{
gboolean res = TRUE;
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);
res &= gst_bin_add (GST_BIN (self), self->upload);
res &= gst_bin_add (GST_BIN (self), self->in_convert);
res &= gst_bin_add (GST_BIN (self), self->out_convert);
res &= gst_bin_add (GST_BIN (self), self->download);
res &= gst_element_link_pads (self->upload, "src", self->in_convert, "sink");
res &=
gst_element_link_pads (self->out_convert, "src", self->download, "sink");
pad = gst_element_get_static_pad (self->download, "src");
if (!pad) {
res = FALSE;
} else {
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) {
res = FALSE;
} else {
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;
}