gstreamer/subprojects/gst-plugins-bad/sys/wic/gstwicimagingfactory.cpp

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/* GStreamer
* Copyright (C) 2022 Seungha Yang <seungha@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.
*/
#include "gstwicimagingfactory.h"
#include <wrl.h>
/* *INDENT-OFF* */
using namespace Microsoft::WRL;
/* *INDENT-ON* */
GST_DEBUG_CATEGORY_STATIC (gst_wic_imaging_factory_debug);
#define GST_CAT_DEFAULT gst_wic_imaging_factory_debug
struct _GstWicImagingFactory
{
GstObject parent;
IWICImagingFactory *handle;
GThread *thread;
GMutex lock;
GCond cond;
GMainContext *context;
GMainLoop *loop;
};
static void gst_wic_imaging_factory_constructed (GObject * object);
static void gst_wic_imaging_factory_finalize (GObject * object);
static gpointer gst_wic_imaging_factory_func (GstWicImagingFactory * self);
#define gst_wic_imaging_factory_parent_class parent_class
G_DEFINE_TYPE (GstWicImagingFactory, gst_wic_imaging_factory, GST_TYPE_OBJECT);
static void
gst_wic_imaging_factory_class_init (GstWicImagingFactoryClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = gst_wic_imaging_factory_constructed;
object_class->finalize = gst_wic_imaging_factory_finalize;
}
static void
gst_wic_imaging_factory_init (GstWicImagingFactory * self)
{
g_mutex_init (&self->lock);
g_cond_init (&self->cond);
self->context = g_main_context_new ();
self->loop = g_main_loop_new (self->context, FALSE);
}
static void
gst_wic_imaging_factory_constructed (GObject * object)
{
GstWicImagingFactory *self = GST_WIC_IMAGING_FACTORY (object);
g_mutex_lock (&self->lock);
self->thread = g_thread_new ("GstWicImagingFactory",
(GThreadFunc) gst_wic_imaging_factory_func, self);
while (!g_main_loop_is_running (self->loop))
g_cond_wait (&self->cond, &self->lock);
g_mutex_unlock (&self->lock);
G_OBJECT_CLASS (parent_class)->constructed (object);
}
static void
gst_wic_imaging_factory_finalize (GObject * object)
{
GstWicImagingFactory *self = GST_WIC_IMAGING_FACTORY (object);
if (self->loop) {
g_main_loop_quit (self->loop);
g_thread_join (self->thread);
g_main_loop_unref (self->loop);
g_main_context_unref (self->context);
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
loop_running_cb (GstWicImagingFactory * self)
{
g_mutex_lock (&self->lock);
g_cond_signal (&self->cond);
g_mutex_unlock (&self->lock);
return G_SOURCE_REMOVE;
}
static gpointer
gst_wic_imaging_factory_func (GstWicImagingFactory * self)
{
HRESULT hr;
ComPtr < IWICImagingFactory > factory;
GSource *idle_source;
CoInitializeEx (nullptr, COINIT_MULTITHREADED);
g_main_context_push_thread_default (self->context);
idle_source = g_idle_source_new ();
g_source_set_callback (idle_source,
(GSourceFunc) loop_running_cb, self, nullptr);
g_source_attach (idle_source, self->context);
g_source_unref (idle_source);
hr = CoCreateInstance (CLSID_WICImagingFactory, nullptr,
CLSCTX_INPROC_SERVER, IID_PPV_ARGS (&factory));
if (FAILED (hr)) {
GST_ERROR_OBJECT (self, "Failed to create factory handle, hr: 0x%x",
(guint) hr);
} else {
self->handle = factory.Detach ();
}
run_loop:
g_main_loop_run (self->loop);
if (self->handle)
self->handle->Release ();
g_main_context_pop_thread_default (self->context);
CoUninitialize ();
return nullptr;
}
GstWicImagingFactory *
gst_wic_imaging_factory_new (void)
{
GstWicImagingFactory *self;
self = (GstWicImagingFactory *) g_object_new (GST_TYPE_WIC_IMAGING_FACTORY,
nullptr);
if (!self->handle) {
gst_object_unref (self);
return nullptr;
}
gst_object_ref_sink (self);
return self;
}
IWICImagingFactory *
gst_wic_imaging_factory_get_handle (GstWicImagingFactory * factory)
{
g_return_val_if_fail (GST_IS_WIC_IMAGING_FACTORY (factory), nullptr);
return factory->handle;
}
HRESULT
gst_wic_imaging_factory_check_codec_support (GstWicImagingFactory * factory,
gboolean is_decoder, REFGUID codec_id)
{
HRESULT hr = E_FAIL;
g_return_val_if_fail (GST_IS_WIC_IMAGING_FACTORY (factory), E_FAIL);
if (is_decoder) {
ComPtr < IWICBitmapDecoder > decoder;
hr = factory->handle->CreateDecoder (codec_id, nullptr, &decoder);
} else {
ComPtr < IWICBitmapEncoder > encoder;
hr = factory->handle->CreateEncoder (codec_id, nullptr, &encoder);
}
return hr;
}