gstreamer/sys/mediafoundation/gstmfdevice.c

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/* GStreamer
* Copyright (C) 2020 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstmfconfig.h"
#include "gstmfvideosrc.h"
#include "gstmfutils.h"
#include "gstmfsourceobject.h"
#include "gstmfdevice.h"
GST_DEBUG_CATEGORY_EXTERN (gst_mf_debug);
#define GST_CAT_DEFAULT gst_mf_debug
enum
{
PROP_0,
PROP_DEVICE_PATH,
};
struct _GstMFDevice
{
GstDevice parent;
gchar *device_path;
};
G_DEFINE_TYPE (GstMFDevice, gst_mf_device, GST_TYPE_DEVICE);
static void gst_mf_device_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_mf_device_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_mf_device_finalize (GObject * object);
static GstElement *gst_mf_device_create_element (GstDevice * device,
const gchar * name);
static void
gst_mf_device_class_init (GstMFDeviceClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
dev_class->create_element = gst_mf_device_create_element;
gobject_class->get_property = gst_mf_device_get_property;
gobject_class->set_property = gst_mf_device_set_property;
gobject_class->finalize = gst_mf_device_finalize;
g_object_class_install_property (gobject_class, PROP_DEVICE_PATH,
g_param_spec_string ("device-path", "Device Path",
"The device path", NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
}
static void
gst_mf_device_init (GstMFDevice * self)
{
}
static void
gst_mf_device_finalize (GObject * object)
{
GstMFDevice *self = GST_MF_DEVICE (object);
g_free (self->device_path);
G_OBJECT_CLASS (gst_mf_device_parent_class)->finalize (object);
}
static GstElement *
gst_mf_device_create_element (GstDevice * device, const gchar * name)
{
GstMFDevice *self = GST_MF_DEVICE (device);
GstElement *elem;
elem = gst_element_factory_make ("mfvideosrc", name);
g_object_set (elem, "device-path", self->device_path, NULL);
return elem;
}
static void
gst_mf_device_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMFDevice *self = GST_MF_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE_PATH:
g_value_set_string (value, self->device_path);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mf_device_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMFDevice *self = GST_MF_DEVICE (object);
switch (prop_id) {
case PROP_DEVICE_PATH:
self->device_path = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
struct _GstMFDeviceProvider
{
GstDeviceProvider parent;
};
G_DEFINE_TYPE (GstMFDeviceProvider, gst_mf_device_provider,
GST_TYPE_DEVICE_PROVIDER);
static GList *gst_mf_device_provider_probe (GstDeviceProvider * provider);
static void
gst_mf_device_provider_class_init (GstMFDeviceProviderClass * klass)
{
GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS (klass);
provider_class->probe = GST_DEBUG_FUNCPTR (gst_mf_device_provider_probe);
gst_device_provider_class_set_static_metadata (provider_class,
"Media Foundation Device Provider",
"Source/Video", "List Media Foundation source devices",
"Seungha Yang <seungha@centricular.com>");
}
static void
gst_mf_device_provider_init (GstMFDeviceProvider * provider)
{
}
static GList *
gst_mf_device_provider_probe (GstDeviceProvider * provider)
{
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
GList *list = NULL;
gint i;
for (i = 0;; i++) {
GstMFSourceObject *obj = NULL;
GstDevice *device;
GstStructure *props = NULL;
GstCaps *caps = NULL;
gchar *device_name = NULL;
gchar *device_path = NULL;
obj = gst_mf_source_object_new (GST_MF_SOURCE_TYPE_VIDEO,
i, NULL, NULL, NULL);
if (!obj)
break;
caps = gst_mf_source_object_get_caps (obj);
if (!caps) {
GST_WARNING_OBJECT (self, "Empty caps for device index %d", i);
goto next;
}
g_object_get (obj,
"device-path", &device_path, "device-name", &device_name, NULL);
if (!device_path) {
GST_WARNING_OBJECT (self, "Device path is unavailable");
goto next;
}
if (!device_name) {
GST_WARNING_OBJECT (self, "Device name is unavailable");
goto next;
}
props = gst_structure_new ("mf-proplist",
"device.api", G_TYPE_STRING, "mediafoundation",
"device.path", G_TYPE_STRING, device_path,
"device.name", G_TYPE_STRING, device_name, NULL);
device = g_object_new (GST_TYPE_MF_DEVICE, "device-path", device_path,
"display-name", device_name, "caps", caps,
"device-class", "Source/Video", "properties", props, NULL);
list = g_list_append (list, device);
next:
if (caps)
gst_caps_unref (caps);
if (props)
gst_structure_free (props);
g_free (device_path);
g_free (device_name);
gst_object_unref (obj);
}
return list;
}