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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Similar to the wasapi2 plugin, GstWinRT library will be used for UWP, and adding new GstWin32DeviceWatcher object implementation for Win32 desktop application. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/947>
590 lines
16 KiB
C
590 lines
16 KiB
C
/* GStreamer
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* Copyright (C) 2020 Seungha Yang <seungha@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 "gstmfconfig.h"
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#include "gstmfvideosrc.h"
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#include "gstmfutils.h"
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#include "gstmfsourceobject.h"
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#include "gstmfdevice.h"
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#if GST_MF_WINAPI_DESKTOP
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#include "gstwin32devicewatcher.h"
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#ifndef INITGUID
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#include <initguid.h>
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#endif
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#include <dbt.h>
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DEFINE_GUID (GST_KSCATEGORY_CAPTURE, 0x65E8773DL, 0x8F56,
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0x11D0, 0xA3, 0xB9, 0x00, 0xA0, 0xC9, 0x22, 0x31, 0x96);
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#endif
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#if GST_MF_WINAPI_APP
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#include <gst/winrt/gstwinrt.h>
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#endif
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GST_DEBUG_CATEGORY_EXTERN (gst_mf_debug);
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#define GST_CAT_DEFAULT gst_mf_debug
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enum
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{
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PROP_0,
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PROP_DEVICE_PATH,
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};
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struct _GstMFDevice
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{
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GstDevice parent;
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gchar *device_path;
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};
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G_DEFINE_TYPE (GstMFDevice, gst_mf_device, GST_TYPE_DEVICE);
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static void gst_mf_device_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static void gst_mf_device_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_mf_device_finalize (GObject * object);
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static GstElement *gst_mf_device_create_element (GstDevice * device,
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const gchar * name);
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static void
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gst_mf_device_class_init (GstMFDeviceClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstDeviceClass *dev_class = GST_DEVICE_CLASS (klass);
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dev_class->create_element = gst_mf_device_create_element;
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gobject_class->get_property = gst_mf_device_get_property;
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gobject_class->set_property = gst_mf_device_set_property;
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gobject_class->finalize = gst_mf_device_finalize;
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g_object_class_install_property (gobject_class, PROP_DEVICE_PATH,
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g_param_spec_string ("device-path", "Device Path",
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"The device path", NULL,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_mf_device_init (GstMFDevice * self)
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{
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}
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static void
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gst_mf_device_finalize (GObject * object)
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{
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GstMFDevice *self = GST_MF_DEVICE (object);
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g_free (self->device_path);
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G_OBJECT_CLASS (gst_mf_device_parent_class)->finalize (object);
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}
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static GstElement *
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gst_mf_device_create_element (GstDevice * device, const gchar * name)
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{
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GstMFDevice *self = GST_MF_DEVICE (device);
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GstElement *elem;
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elem = gst_element_factory_make ("mfvideosrc", name);
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g_object_set (elem, "device-path", self->device_path, NULL);
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return elem;
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}
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static void
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gst_mf_device_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstMFDevice *self = GST_MF_DEVICE (object);
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switch (prop_id) {
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case PROP_DEVICE_PATH:
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g_value_set_string (value, self->device_path);
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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_mf_device_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstMFDevice *self = GST_MF_DEVICE (object);
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switch (prop_id) {
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case PROP_DEVICE_PATH:
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self->device_path = g_value_dup_string (value);
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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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struct _GstMFDeviceProvider
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{
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GstDeviceProvider parent;
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GstObject *watcher;
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GMutex lock;
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GCond cond;
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gboolean enum_completed;
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};
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G_DEFINE_TYPE (GstMFDeviceProvider, gst_mf_device_provider,
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GST_TYPE_DEVICE_PROVIDER);
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static void gst_mf_device_provider_dispose (GObject * object);
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static void gst_mf_device_provider_finalize (GObject * object);
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static GList *gst_mf_device_provider_probe (GstDeviceProvider * provider);
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static gboolean gst_mf_device_provider_start (GstDeviceProvider * provider);
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static void gst_mf_device_provider_stop (GstDeviceProvider * provider);
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#if GST_MF_WINAPI_DESKTOP
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static gboolean gst_mf_device_provider_start_win32 (GstDeviceProvider * self);
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static void gst_mf_device_provider_device_changed (GstWin32DeviceWatcher *
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watcher, WPARAM wparam, LPARAM lparam, gpointer user_data);
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#endif
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#if GST_MF_WINAPI_APP
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static gboolean gst_mf_device_provider_start_winrt (GstDeviceProvider * self);
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static void
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gst_mf_device_provider_device_added (GstWinRTDeviceWatcher * watcher,
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__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformation * info,
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gpointer user_data);
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static void
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gst_mf_device_provider_device_updated (GstWinRTDeviceWatcher * watcher,
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__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformationUpdate *
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info_update, gpointer user_data);
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static void gst_mf_device_provider_device_removed (GstWinRTDeviceWatcher *
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watcher,
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__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformationUpdate *
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info_update, gpointer user_data);
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static void
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gst_mf_device_provider_device_enum_completed (GstWinRTDeviceWatcher *
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watcher, gpointer user_data);
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#endif
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static void
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gst_mf_device_provider_on_device_updated (GstMFDeviceProvider * self);
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static void
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gst_mf_device_provider_class_init (GstMFDeviceProviderClass * klass)
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{
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GstDeviceProviderClass *provider_class = GST_DEVICE_PROVIDER_CLASS (klass);
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provider_class->probe = GST_DEBUG_FUNCPTR (gst_mf_device_provider_probe);
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provider_class->start = GST_DEBUG_FUNCPTR (gst_mf_device_provider_start);
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provider_class->stop = GST_DEBUG_FUNCPTR (gst_mf_device_provider_stop);
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gst_device_provider_class_set_static_metadata (provider_class,
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"Media Foundation Device Provider",
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"Source/Video", "List Media Foundation source devices",
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"Seungha Yang <seungha@centricular.com>");
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}
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static void
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gst_mf_device_provider_init (GstMFDeviceProvider * self)
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{
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#if GST_MF_WINAPI_DESKTOP
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GstWin32DeviceWatcherCallbacks win32_callbacks;
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win32_callbacks.device_changed = gst_mf_device_provider_device_changed;
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self->watcher = (GstObject *)
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gst_win32_device_watcher_new (DBT_DEVTYP_DEVICEINTERFACE,
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&GST_KSCATEGORY_CAPTURE, &win32_callbacks, self);
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#endif
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#if GST_MF_WINAPI_APP
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if (!self->watcher) {
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GstWinRTDeviceWatcherCallbacks winrt_callbacks;
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winrt_callbacks.added = gst_mf_device_provider_device_added;
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winrt_callbacks.updated = gst_mf_device_provider_device_updated;
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winrt_callbacks.removed = gst_mf_device_provider_device_removed;
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winrt_callbacks.enumeration_completed =
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gst_mf_device_provider_device_enum_completed;
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self->watcher = (GstObject *)
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gst_winrt_device_watcher_new (GST_WINRT_DEVICE_CLASS_VIDEO_CAPTURE,
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&winrt_callbacks, self);
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}
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#endif
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g_mutex_init (&self->lock);
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g_cond_init (&self->cond);
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}
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static void
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gst_mf_device_provider_dispose (GObject * object)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (object);
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gst_clear_object (&self->watcher);
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G_OBJECT_CLASS (gst_mf_device_provider_parent_class)->dispose (object);
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}
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static void
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gst_mf_device_provider_finalize (GObject * object)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (object);
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g_mutex_clear (&self->lock);
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g_cond_clear (&self->cond);
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G_OBJECT_CLASS (gst_mf_device_provider_parent_class)->finalize (object);
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}
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static GList *
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gst_mf_device_provider_probe (GstDeviceProvider * provider)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
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GList *list = NULL;
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gint i;
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for (i = 0;; i++) {
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GstMFSourceObject *obj = NULL;
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GstDevice *device;
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GstStructure *props = NULL;
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GstCaps *caps = NULL;
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gchar *device_name = NULL;
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gchar *device_path = NULL;
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obj = gst_mf_source_object_new (GST_MF_SOURCE_TYPE_VIDEO,
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i, NULL, NULL, NULL);
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if (!obj)
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break;
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caps = gst_mf_source_object_get_caps (obj);
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if (!caps) {
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GST_WARNING_OBJECT (self, "Empty caps for device index %d", i);
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goto next;
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}
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g_object_get (obj,
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"device-path", &device_path, "device-name", &device_name, NULL);
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if (!device_path) {
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GST_WARNING_OBJECT (self, "Device path is unavailable");
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goto next;
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}
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if (!device_name) {
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GST_WARNING_OBJECT (self, "Device name is unavailable");
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goto next;
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}
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props = gst_structure_new ("mf-proplist",
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"device.api", G_TYPE_STRING, "mediafoundation",
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"device.path", G_TYPE_STRING, device_path,
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"device.name", G_TYPE_STRING, device_name, NULL);
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device = g_object_new (GST_TYPE_MF_DEVICE, "device-path", device_path,
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"display-name", device_name, "caps", caps,
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"device-class", "Source/Video", "properties", props, NULL);
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list = g_list_append (list, device);
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next:
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if (caps)
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gst_caps_unref (caps);
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if (props)
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gst_structure_free (props);
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g_free (device_path);
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g_free (device_name);
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gst_object_unref (obj);
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}
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return list;
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}
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#if GST_MF_WINAPI_DESKTOP
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static gboolean
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gst_mf_device_provider_start_win32 (GstDeviceProvider * provider)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
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GstWin32DeviceWatcher *watcher;
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GList *devices = NULL;
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GList *iter;
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if (!GST_IS_WIN32_DEVICE_WATCHER (self->watcher))
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return FALSE;
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GST_DEBUG_OBJECT (self, "Starting Win32 watcher");
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watcher = GST_WIN32_DEVICE_WATCHER (self->watcher);
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devices = gst_mf_device_provider_probe (provider);
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if (devices) {
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for (iter = devices; iter; iter = g_list_next (iter)) {
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gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
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}
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g_list_free (devices);
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}
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return gst_win32_device_watcher_start (watcher);
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}
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#endif
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#if GST_MF_WINAPI_APP
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static gboolean
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gst_mf_device_provider_start_winrt (GstDeviceProvider * provider)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
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GstWinRTDeviceWatcher *watcher;
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GList *devices = NULL;
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GList *iter;
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if (!GST_IS_WINRT_DEVICE_WATCHER (self->watcher))
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return FALSE;
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GST_DEBUG_OBJECT (self, "Starting WinRT watcher");
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watcher = GST_WINRT_DEVICE_WATCHER (self->watcher);
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self->enum_completed = FALSE;
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if (!gst_winrt_device_watcher_start (watcher))
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return FALSE;
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/* Wait for initial enumeration to be completed */
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g_mutex_lock (&self->lock);
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while (!self->enum_completed)
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g_cond_wait (&self->cond, &self->lock);
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devices = gst_mf_device_provider_probe (provider);
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if (devices) {
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for (iter = devices; iter; iter = g_list_next (iter)) {
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gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
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}
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g_list_free (devices);
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}
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g_mutex_unlock (&self->lock);
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return TRUE;
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}
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#endif
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static gboolean
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gst_mf_device_provider_start (GstDeviceProvider * provider)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
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gboolean ret = FALSE;
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if (!self->watcher) {
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GST_ERROR_OBJECT (self, "DeviceWatcher object wasn't configured");
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return FALSE;
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}
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#if GST_MF_WINAPI_DESKTOP
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ret = gst_mf_device_provider_start_win32 (provider);
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#endif
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#if GST_MF_WINAPI_APP
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if (!ret)
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ret = gst_mf_device_provider_start_winrt (provider);
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#endif
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return ret;
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}
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static void
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gst_mf_device_provider_stop (GstDeviceProvider * provider)
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{
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GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (provider);
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if (self->watcher) {
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#if GST_MF_WINAPI_DESKTOP
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if (GST_IS_WIN32_DEVICE_WATCHER (self->watcher)) {
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gst_win32_device_watcher_stop (GST_WIN32_DEVICE_WATCHER (self->watcher));
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}
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#endif
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#if GST_MF_WINAPI_APP
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if (GST_IS_WINRT_DEVICE_WATCHER (self->watcher)) {
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gst_winrt_device_watcher_stop (GST_WINRT_DEVICE_WATCHER (self->watcher));
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}
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#endif
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}
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}
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static gboolean
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gst_mf_device_is_in_list (GList * list, GstDevice * device)
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{
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GList *iter;
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GstStructure *s;
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const gchar *device_id;
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gboolean found = FALSE;
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s = gst_device_get_properties (device);
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g_assert (s);
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device_id = gst_structure_get_string (s, "device.path");
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g_assert (device_id);
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for (iter = list; iter; iter = g_list_next (iter)) {
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GstStructure *other_s;
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const gchar *other_id;
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other_s = gst_device_get_properties (GST_DEVICE (iter->data));
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g_assert (other_s);
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other_id = gst_structure_get_string (other_s, "device.path");
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g_assert (other_id);
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if (g_ascii_strcasecmp (device_id, other_id) == 0) {
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found = TRUE;
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}
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gst_structure_free (other_s);
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if (found)
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break;
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}
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gst_structure_free (s);
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return found;
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}
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static void
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gst_mf_device_provider_update_devices (GstMFDeviceProvider * self)
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{
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GstDeviceProvider *provider = GST_DEVICE_PROVIDER_CAST (self);
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GList *prev_devices = NULL;
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GList *new_devices = NULL;
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GList *to_add = NULL;
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GList *to_remove = NULL;
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GList *iter;
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GST_OBJECT_LOCK (self);
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prev_devices = g_list_copy_deep (provider->devices,
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(GCopyFunc) gst_object_ref, NULL);
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GST_OBJECT_UNLOCK (self);
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new_devices = gst_mf_device_provider_probe (provider);
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/* Ownership of GstDevice for gst_device_provider_device_add()
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* and gst_device_provider_device_remove() is a bit complicated.
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* Remove floating reference here for things to be clear */
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for (iter = new_devices; iter; iter = g_list_next (iter))
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gst_object_ref_sink (iter->data);
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|
|
|
/* Check newly added devices */
|
|
for (iter = new_devices; iter; iter = g_list_next (iter)) {
|
|
if (!gst_mf_device_is_in_list (prev_devices, GST_DEVICE (iter->data))) {
|
|
to_add = g_list_prepend (to_add, gst_object_ref (iter->data));
|
|
}
|
|
}
|
|
|
|
/* Check removed device */
|
|
for (iter = prev_devices; iter; iter = g_list_next (iter)) {
|
|
if (!gst_mf_device_is_in_list (new_devices, GST_DEVICE (iter->data))) {
|
|
to_remove = g_list_prepend (to_remove, gst_object_ref (iter->data));
|
|
}
|
|
}
|
|
|
|
for (iter = to_remove; iter; iter = g_list_next (iter))
|
|
gst_device_provider_device_remove (provider, GST_DEVICE (iter->data));
|
|
|
|
for (iter = to_add; iter; iter = g_list_next (iter))
|
|
gst_device_provider_device_add (provider, GST_DEVICE (iter->data));
|
|
|
|
if (prev_devices)
|
|
g_list_free_full (prev_devices, (GDestroyNotify) gst_object_unref);
|
|
|
|
if (to_add)
|
|
g_list_free_full (to_add, (GDestroyNotify) gst_object_unref);
|
|
|
|
if (to_remove)
|
|
g_list_free_full (to_remove, (GDestroyNotify) gst_object_unref);
|
|
}
|
|
|
|
#if GST_MF_WINAPI_DESKTOP
|
|
static void
|
|
gst_mf_device_provider_device_changed (GstWin32DeviceWatcher * watcher,
|
|
WPARAM wparam, LPARAM lparam, gpointer user_data)
|
|
{
|
|
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
|
|
|
|
if (wparam == DBT_DEVICEARRIVAL || wparam == DBT_DEVICEREMOVECOMPLETE) {
|
|
gst_mf_device_provider_update_devices (self);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if GST_MF_WINAPI_APP
|
|
static void
|
|
gst_mf_device_provider_device_added (GstWinRTDeviceWatcher * watcher,
|
|
__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformation * info,
|
|
gpointer user_data)
|
|
{
|
|
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
|
|
|
|
if (self->enum_completed)
|
|
gst_mf_device_provider_update_devices (self);
|
|
}
|
|
|
|
static void
|
|
gst_mf_device_provider_device_removed (GstWinRTDeviceWatcher * watcher,
|
|
__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformationUpdate *
|
|
info_update, gpointer user_data)
|
|
{
|
|
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
|
|
|
|
if (self->enum_completed)
|
|
gst_mf_device_provider_update_devices (self);
|
|
}
|
|
|
|
|
|
static void
|
|
gst_mf_device_provider_device_updated (GstWinRTDeviceWatcher * watcher,
|
|
__x_ABI_CWindows_CDevices_CEnumeration_CIDeviceInformationUpdate *
|
|
info_update, gpointer user_data)
|
|
{
|
|
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
|
|
|
|
gst_mf_device_provider_update_devices (self);
|
|
}
|
|
|
|
static void
|
|
gst_mf_device_provider_device_enum_completed (GstWinRTDeviceWatcher *
|
|
watcher, gpointer user_data)
|
|
{
|
|
GstMFDeviceProvider *self = GST_MF_DEVICE_PROVIDER (user_data);
|
|
|
|
g_mutex_lock (&self->lock);
|
|
GST_DEBUG_OBJECT (self, "Enumeration completed");
|
|
self->enum_completed = TRUE;
|
|
g_cond_signal (&self->cond);
|
|
g_mutex_unlock (&self->lock);
|
|
}
|
|
#endif
|