/* * GStreamer * Copyright (C) 2008 Julien Isorce * Copyright (C) 2012 Matthew Waters * Copyright (C) 2019 Seungha Yang * * 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 "gstd3d11window.h" #include "gstd3d11device.h" #include "gstd3d11memory.h" #include "gstd3d11utils.h" #include G_LOCK_DEFINE_STATIC (create_lock); enum { PROP_0, PROP_D3D11_DEVICE, PROP_FORCE_ASPECT_RATIO, PROP_ENABLE_NAVIGATION_EVENTS, }; #define DEFAULT_ENABLE_NAVIGATION_EVENTS TRUE #define DEFAULT_FORCE_ASPECT_RATIO TRUE enum { SIGNAL_KEY_EVENT, SIGNAL_MOUSE_EVENT, SIGNAL_GOT_WINDOW_HANDLE, SIGNAL_LAST }; static guint d3d11_window_signals[SIGNAL_LAST] = { 0, }; #define EXTERNAL_PROC_PROP_NAME "d3d11_window_external_proc" #define D3D11_WINDOW_PROP_NAME "gst_d3d11_window_object" static LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); static LRESULT FAR PASCAL sub_class_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); GST_DEBUG_CATEGORY_STATIC (gst_d3d11_window_debug); #define GST_CAT_DEFAULT gst_d3d11_window_debug #define gst_d3d11_window_parent_class parent_class G_DEFINE_TYPE (GstD3D11Window, gst_d3d11_window, GST_TYPE_OBJECT); typedef struct { GstD3D11Window *window; GstVideoRectangle *rect; GstBuffer *buffer; GstFlowReturn ret; } FramePresentData; static void gst_d3d11_window_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_d3d11_window_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_d3d11_window_constructed (GObject * object); static void gst_d3d11_window_dispose (GObject * object); static void gst_d3d11_window_finalize (GObject * object); static gpointer gst_d3d11_window_thread_func (gpointer data); static gboolean _create_window (GstD3D11Window * self); static void _open_window (GstD3D11Window * self); static void _close_window (GstD3D11Window * self); static void release_external_win_id (GstD3D11Window * self); static void _present_on_device_thread (GstD3D11Device * device, FramePresentData * data); static void gst_d3d11_window_class_init (GstD3D11WindowClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); gobject_class->set_property = gst_d3d11_window_set_property; gobject_class->get_property = gst_d3d11_window_get_property; gobject_class->constructed = gst_d3d11_window_constructed; gobject_class->dispose = gst_d3d11_window_dispose; gobject_class->finalize = gst_d3d11_window_finalize; g_object_class_install_property (gobject_class, PROP_D3D11_DEVICE, g_param_spec_object ("d3d11device", "D3D11 Device", "GstD3D11Device object for creating swapchain", GST_TYPE_D3D11_DEVICE, G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO, g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio", "When enabled, scaling will respect original aspect ratio", DEFAULT_FORCE_ASPECT_RATIO, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_ENABLE_NAVIGATION_EVENTS, g_param_spec_boolean ("enable-navigation-events", "Enable navigation events", "When enabled, signals for navigation events are emitted", DEFAULT_ENABLE_NAVIGATION_EVENTS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); d3d11_window_signals[SIGNAL_KEY_EVENT] = g_signal_new ("key-event", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 2, G_TYPE_STRING, G_TYPE_STRING); d3d11_window_signals[SIGNAL_MOUSE_EVENT] = g_signal_new ("mouse-event", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 4, G_TYPE_STRING, G_TYPE_INT, G_TYPE_DOUBLE, G_TYPE_DOUBLE); d3d11_window_signals[SIGNAL_GOT_WINDOW_HANDLE] = g_signal_new ("got-window-handle", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_POINTER); GST_DEBUG_CATEGORY_INIT (gst_d3d11_window_debug, "d3d11window", 0, "d3d11 window"); } static void gst_d3d11_window_init (GstD3D11Window * self) { g_mutex_init (&self->lock); g_cond_init (&self->cond); self->main_context = g_main_context_new (); self->force_aspect_ratio = DEFAULT_FORCE_ASPECT_RATIO; self->enable_navigation_events = DEFAULT_ENABLE_NAVIGATION_EVENTS; self->aspect_ratio_n = 1; self->aspect_ratio_d = 1; GST_TRACE_OBJECT (self, "Initialized"); } static void gst_d3d11_window_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstD3D11Window *self = GST_D3D11_WINDOW (object); GST_OBJECT_LOCK (self); switch (prop_id) { case PROP_D3D11_DEVICE: self->device = g_value_dup_object (value); break; case PROP_FORCE_ASPECT_RATIO: { gboolean force_aspect_ratio; force_aspect_ratio = g_value_get_boolean (value); if (force_aspect_ratio != self->force_aspect_ratio) self->pending_resize = TRUE; self->force_aspect_ratio = force_aspect_ratio; break; } case PROP_ENABLE_NAVIGATION_EVENTS: self->enable_navigation_events = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (self); } static void gst_d3d11_window_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstD3D11Window *self = GST_D3D11_WINDOW (object); switch (prop_id) { case PROP_ENABLE_NAVIGATION_EVENTS: g_value_set_boolean (value, self->enable_navigation_events); break; case PROP_FORCE_ASPECT_RATIO: g_value_set_boolean (value, self->force_aspect_ratio); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_d3d11_window_constructed (GObject * object) { GstD3D11Window *self = GST_D3D11_WINDOW (object); g_mutex_lock (&self->lock); self->loop = g_main_loop_new (self->main_context, FALSE); self->thread = g_thread_new ("GstD3D11Window", (GThreadFunc) gst_d3d11_window_thread_func, self); while (!g_main_loop_is_running (self->loop)) g_cond_wait (&self->cond, &self->lock); g_mutex_unlock (&self->lock); } static void gst_d3d11_window_release_resources (GstD3D11Device * device, GstD3D11Window * window) { if (window->backbuffer) { ID3D11Texture2D_Release (window->backbuffer); window->backbuffer = NULL; } if (window->rtv) { ID3D11RenderTargetView_Release (window->rtv); window->rtv = NULL; } if (window->swap_chain) { IDXGISwapChain_Release (window->swap_chain); window->swap_chain = NULL; } } static void gst_d3d11_window_dispose (GObject * object) { GstD3D11Window *self = GST_D3D11_WINDOW (object); release_external_win_id (self); if (self->loop) { g_main_loop_quit (self->loop); } if (self->thread) { g_thread_join (self->thread); self->thread = NULL; } if (self->loop) { g_main_loop_unref (self->loop); self->loop = NULL; } if (self->main_context) { g_main_context_unref (self->main_context); self->main_context = NULL; } if (self->device) { gst_d3d11_device_thread_add (self->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_release_resources, self); } if (self->converter) { gst_d3d11_color_converter_free (self->converter); self->converter = NULL; } gst_clear_buffer (&self->cached_buffer); gst_clear_object (&self->device); G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_d3d11_window_finalize (GObject * object) { GstD3D11Window *self = GST_D3D11_WINDOW (object); g_mutex_clear (&self->lock); g_cond_clear (&self->cond); G_OBJECT_CLASS (parent_class)->finalize (object); } static gboolean running_cb (gpointer user_data) { GstD3D11Window *self = GST_D3D11_WINDOW (user_data); GST_TRACE_OBJECT (self, "Main loop running now"); g_mutex_lock (&self->lock); g_cond_signal (&self->cond); g_mutex_unlock (&self->lock); return G_SOURCE_REMOVE; } static gpointer gst_d3d11_window_thread_func (gpointer data) { GstD3D11Window *self = GST_D3D11_WINDOW (data); GSource *source; GST_DEBUG_OBJECT (self, "Enter loop"); g_main_context_push_thread_default (self->main_context); self->created = _create_window (self); source = g_idle_source_new (); g_source_set_callback (source, (GSourceFunc) running_cb, self, NULL); g_source_attach (source, self->main_context); g_source_unref (source); if (self->created) _open_window (self); g_main_loop_run (self->loop); if (self->created) _close_window (self); g_main_context_pop_thread_default (self->main_context); GST_DEBUG_OBJECT (self, "Exit loop"); return NULL; } static gboolean msg_cb (GIOChannel * source, GIOCondition condition, gpointer data) { MSG msg; if (!PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) return G_SOURCE_CONTINUE; TranslateMessage (&msg); DispatchMessage (&msg); return G_SOURCE_CONTINUE; } static void _open_window (GstD3D11Window * self) { self->msg_io_channel = g_io_channel_win32_new_messages (0); self->msg_source = g_io_create_watch (self->msg_io_channel, G_IO_IN); g_source_set_callback (self->msg_source, (GSourceFunc) msg_cb, self, NULL); g_source_attach (self->msg_source, self->main_context); } static void _close_window (GstD3D11Window * self) { if (self->internal_win_id) { RemoveProp (self->internal_win_id, D3D11_WINDOW_PROP_NAME); ShowWindow (self->internal_win_id, SW_HIDE); SetParent (self->internal_win_id, NULL); if (!DestroyWindow (self->internal_win_id)) GST_WARNING ("failed to destroy window %" G_GUINTPTR_FORMAT ", 0x%x", (guintptr) self->internal_win_id, (guint) GetLastError ()); self->internal_win_id = NULL; } if (self->msg_source) { g_source_destroy (self->msg_source); g_source_unref (self->msg_source); self->msg_source = NULL; } if (self->msg_io_channel) { g_io_channel_unref (self->msg_io_channel); self->msg_io_channel = NULL; } } static void set_external_win_id (GstD3D11Window * self) { WNDPROC external_window_proc; RECT rect; if (!self->external_win_id) { /* no parent so the internal window needs borders and system menu */ SetWindowLongPtr (self->internal_win_id, GWL_STYLE, WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW); SetParent (self->internal_win_id, NULL); return; } external_window_proc = (WNDPROC) GetWindowLongPtr (self->external_win_id, GWLP_WNDPROC); GST_DEBUG ("set external window %" G_GUINTPTR_FORMAT, (guintptr) self->external_win_id); SetProp (self->external_win_id, EXTERNAL_PROC_PROP_NAME, (WNDPROC) external_window_proc); SetProp (self->external_win_id, D3D11_WINDOW_PROP_NAME, self); SetWindowLongPtr (self->external_win_id, GWLP_WNDPROC, (LONG_PTR) sub_class_proc); SetWindowLongPtr (self->internal_win_id, GWL_STYLE, WS_CHILD | WS_MAXIMIZE); SetParent (self->internal_win_id, self->external_win_id); /* take changes into account: SWP_FRAMECHANGED */ GetClientRect (self->external_win_id, &rect); SetWindowPos (self->internal_win_id, HWND_TOP, rect.left, rect.top, rect.right, rect.bottom, SWP_ASYNCWINDOWPOS | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED | SWP_NOACTIVATE); MoveWindow (self->internal_win_id, rect.left, rect.top, rect.right, rect.bottom, FALSE); } static void release_external_win_id (GstD3D11Window * self) { WNDPROC external_proc; if (!self->external_win_id) return; external_proc = GetProp (self->external_win_id, EXTERNAL_PROC_PROP_NAME); if (!external_proc) return; GST_DEBUG ("release external window %" G_GUINTPTR_FORMAT, (guintptr) self->external_win_id); SetWindowLongPtr (self->external_win_id, GWLP_WNDPROC, (LONG_PTR) external_proc); RemoveProp (self->external_win_id, EXTERNAL_PROC_PROP_NAME); RemoveProp (self->external_win_id, D3D11_WINDOW_PROP_NAME); self->external_win_id = NULL; } static gboolean _create_window (GstD3D11Window * self) { WNDCLASSEX wc; ATOM atom = 0; HINSTANCE hinstance = GetModuleHandle (NULL); GST_LOG_OBJECT (self, "Attempting to create a win32 window"); G_LOCK (create_lock); atom = GetClassInfoEx (hinstance, "GSTD3D11", &wc); if (atom == 0) { GST_LOG_OBJECT (self, "Register internal window class"); ZeroMemory (&wc, sizeof (WNDCLASSEX)); wc.cbSize = sizeof (WNDCLASSEX); wc.lpfnWndProc = window_proc; wc.hInstance = hinstance; wc.hIcon = LoadIcon (NULL, IDI_WINLOGO); wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW; wc.hCursor = LoadCursor (NULL, IDC_ARROW); wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH); wc.lpszClassName = "GSTD3D11"; atom = RegisterClassEx (&wc); if (atom == 0) { G_UNLOCK (create_lock); GST_ERROR_OBJECT (self, "Failed to register window class 0x%x", (unsigned int) GetLastError ()); return FALSE; } } else { GST_LOG_OBJECT (self, "window class was already registered"); } self->device_handle = 0; self->internal_win_id = 0; self->visible = FALSE; self->internal_win_id = CreateWindowEx (0, "GSTD3D11", "Direct3D11 renderer", WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, (HWND) NULL, (HMENU) NULL, hinstance, self); G_UNLOCK (create_lock); if (!self->internal_win_id) { GST_ERROR_OBJECT (self, "Failed to create d3d11 window"); return FALSE; } GST_DEBUG_OBJECT (self, "d3d11 window created: %" G_GUINTPTR_FORMAT, (guintptr) self->internal_win_id); g_signal_emit (self, d3d11_window_signals[SIGNAL_GOT_WINDOW_HANDLE], 0, self->internal_win_id); /* device_handle is set in the window_proc */ if (!self->device_handle) { GST_ERROR_OBJECT (self, "device handle is not available"); return FALSE; } GST_LOG_OBJECT (self, "Created a internal d3d11 window %p", self->internal_win_id); return TRUE; } static void gst_d3d11_window_on_resize (GstD3D11Device * device, GstD3D11Window * window) { HRESULT hr; ID3D11Device *d3d11_dev; ID3D11DeviceContext *d3d11_context; guint width, height; if (!window->swap_chain) return; d3d11_dev = gst_d3d11_device_get_device_handle (device); d3d11_context = gst_d3d11_device_get_device_context_handle (device); if (window->backbuffer) { ID3D11Texture2D_Release (window->backbuffer); window->backbuffer = NULL; } if (window->rtv) { ID3D11RenderTargetView_Release (window->rtv); window->rtv = NULL; } width = window->width; height = window->height; if (width != window->surface_width || height != window->surface_height) { GstVideoRectangle src_rect, dst_rect; src_rect.x = 0; src_rect.y = 0; src_rect.w = width * window->aspect_ratio_n; src_rect.h = height * window->aspect_ratio_d; dst_rect.x = 0; dst_rect.y = 0; dst_rect.w = window->surface_width; dst_rect.h = window->surface_height; if (window->converter) { if (window->force_aspect_ratio) { src_rect.w = width * window->aspect_ratio_n; src_rect.h = height * window->aspect_ratio_d; gst_video_sink_center_rect (src_rect, dst_rect, &window->render_rect, TRUE); } else { window->render_rect = dst_rect; } width = window->surface_width; height = window->surface_height; } else { /* NOTE: there can be various way to resize texture, but * we just copy incoming texture toward resized swap chain buffer in order to * avoid shader coding. * To keep aspect ratio, required vertical or horizontal padding area * will be calculated in here. */ gdouble src_ratio, dst_ratio; gdouble aspect_ratio = (gdouble) window->aspect_ratio_n / (gdouble) window->aspect_ratio_d; src_ratio = (gdouble) width / height; dst_ratio = (gdouble) window->surface_width / window->surface_height / aspect_ratio; src_rect.w = width; src_rect.h = height; if (window->force_aspect_ratio) { if (src_ratio > dst_ratio) { /* padding top and bottom */ dst_rect.w = width; dst_rect.h = width / dst_ratio; } else { /* padding left and right */ dst_rect.w = height * dst_ratio; dst_rect.h = height; } } else { dst_rect.w = width; dst_rect.h = height; } gst_video_sink_center_rect (src_rect, dst_rect, &window->render_rect, TRUE); width = dst_rect.w; height = dst_rect.h; } } hr = IDXGISwapChain_ResizeBuffers (window->swap_chain, 0, width, height, DXGI_FORMAT_UNKNOWN, 0); if (!gst_d3d11_result (hr)) { GST_ERROR_OBJECT (window, "Couldn't resize buffers, hr: 0x%x", (guint) hr); return; } hr = IDXGISwapChain_GetBuffer (window->swap_chain, 0, &IID_ID3D11Texture2D, (void **) &window->backbuffer); if (!gst_d3d11_result (hr)) { GST_ERROR_OBJECT (window, "Cannot get backbuffer from swapchain, hr: 0x%x", (guint) hr); return; } hr = ID3D11Device_CreateRenderTargetView (d3d11_dev, (ID3D11Resource *) window->backbuffer, NULL, &window->rtv); if (!gst_d3d11_result (hr)) { GST_ERROR_OBJECT (window, "Cannot create render target view, hr: 0x%x", (guint) hr); return; } ID3D11DeviceContext_OMSetRenderTargets (d3d11_context, 1, &window->rtv, NULL); if (window->cached_buffer) { FramePresentData present_data = { 0, }; present_data.window = window; present_data.rect = &window->rect; present_data.buffer = window->cached_buffer; GST_DEBUG_OBJECT (window, "redraw cached buffer"); _present_on_device_thread (window->device, &present_data); } } static void gst_d3d11_window_on_size (GstD3D11Window * self, HWND hWnd, WPARAM wParam, LPARAM lParam) { RECT clientRect = { 0, }; GetClientRect (hWnd, &clientRect); self->surface_width = clientRect.right - clientRect.left; self->surface_height = clientRect.bottom - clientRect.top; GST_LOG_OBJECT (self, "WM_PAINT, surface %ux%u", self->surface_width, self->surface_height); gst_d3d11_device_thread_add_full (self->device, G_PRIORITY_HIGH, (GstD3D11DeviceThreadFunc) gst_d3d11_window_on_resize, self, NULL); } static void gst_d3d11_window_on_keyboard_event (GstD3D11Window * self, HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { gunichar2 wcrep[128]; const gchar *event; if (!self->enable_navigation_events) return; if (GetKeyNameTextW (lParam, (LPWSTR) wcrep, 128)) { gchar *utfrep = g_utf16_to_utf8 (wcrep, 128, NULL, NULL, NULL); if (utfrep) { if (uMsg == WM_KEYDOWN) event = "key-press"; else event = "key-release"; g_signal_emit (self, d3d11_window_signals[SIGNAL_KEY_EVENT], 0, event, utfrep); g_free (utfrep); } } } static void gst_d3d11_window_on_mouse_event (GstD3D11Window * self, HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { gint button; const gchar *event = NULL; if (!self->enable_navigation_events) return; /* FIXME: convert to render coordinate */ switch (uMsg) { case WM_MOUSEMOVE: button = 0; event = "mouse-move"; break; case WM_LBUTTONDOWN: button = 1; event = "mouse-button-press"; break; case WM_LBUTTONUP: button = 1; event = "mouse-button-release"; break; case WM_RBUTTONDOWN: button = 2; event = "mouse-button-press"; break; case WM_RBUTTONUP: button = 2; event = "mouse-button-release"; break; case WM_MBUTTONDOWN: button = 3; event = "mouse-button-press"; break; case WM_MBUTTONUP: button = 3; event = "mouse-button-release"; break; default: break; } if (event) g_signal_emit (self, d3d11_window_signals[SIGNAL_MOUSE_EVENT], 0, event, button, (gdouble) LOWORD (lParam), (gdouble) HIWORD (lParam)); } static void gst_d3d11_window_handle_window_proc (GstD3D11Window * self, HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { switch (uMsg) { case WM_SIZE: gst_d3d11_window_on_size (self, hWnd, wParam, lParam); break; case WM_CLOSE: if (self->internal_win_id) { ShowWindow (self->internal_win_id, SW_HIDE); _close_window (self); } break; case WM_KEYDOWN: case WM_KEYUP: gst_d3d11_window_on_keyboard_event (self, hWnd, uMsg, wParam, lParam); break; case WM_LBUTTONDOWN: case WM_LBUTTONUP: case WM_RBUTTONDOWN: case WM_RBUTTONUP: case WM_MBUTTONDOWN: case WM_MBUTTONUP: case WM_MOUSEMOVE: gst_d3d11_window_on_mouse_event (self, hWnd, uMsg, wParam, lParam); break; default: break; } return; } static LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { GstD3D11Window *self; if (uMsg == WM_CREATE) { self = GST_D3D11_WINDOW (((LPCREATESTRUCT) lParam)->lpCreateParams); GST_LOG_OBJECT (self, "WM_CREATE"); self->device_handle = GetDC (hWnd); /* Do this, otherwise we hang on exit. We can still use it (due to the * CS_OWNDC flag in the WindowClass) after we have Released. */ ReleaseDC (hWnd, self->device_handle); SetProp (hWnd, D3D11_WINDOW_PROP_NAME, self); } else if (GetProp (hWnd, D3D11_WINDOW_PROP_NAME)) { self = GST_D3D11_WINDOW (GetProp (hWnd, D3D11_WINDOW_PROP_NAME)); g_assert (self->internal_win_id == hWnd); gst_d3d11_window_handle_window_proc (self, hWnd, uMsg, wParam, lParam); } return DefWindowProc (hWnd, uMsg, wParam, lParam); } static LRESULT FAR PASCAL sub_class_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { WNDPROC external_window_proc = GetProp (hWnd, EXTERNAL_PROC_PROP_NAME); GstD3D11Window *self = (GstD3D11Window *) GetProp (hWnd, D3D11_WINDOW_PROP_NAME); if (uMsg == WM_SIZE) { MoveWindow (self->internal_win_id, 0, 0, LOWORD (lParam), HIWORD (lParam), FALSE); } else if (uMsg == WM_CLOSE) { g_mutex_lock (&self->lock); GST_WARNING_OBJECT (self, "external window is closing"); release_external_win_id (self); self->external_win_id = NULL; self->overlay_state = GST_D3D11_WINDOW_OVERLAY_STATE_CLOSED; g_mutex_unlock (&self->lock); } else { gst_d3d11_window_handle_window_proc (self, hWnd, uMsg, wParam, lParam); } return CallWindowProc (external_window_proc, hWnd, uMsg, wParam, lParam); } GstD3D11Window * gst_d3d11_window_new (GstD3D11Device * device) { GstD3D11Window *window; g_return_val_if_fail (GST_IS_D3D11_DEVICE (device), NULL); window = g_object_new (GST_TYPE_D3D11_WINDOW, "d3d11device", device, NULL); g_object_ref_sink (window); if (!window->created) gst_clear_object (&window); return window; } #ifdef HAVE_DXGI_1_5_H static inline UINT16 fraction_to_uint (guint num, guint den, guint scale) { gdouble val; gst_util_fraction_to_double (num, den, &val); return (UINT16) val *scale; } static void mastering_display_gst_to_dxgi (GstVideoMasteringDisplayInfo * m, GstVideoContentLightLevel * c, DXGI_HDR_METADATA_HDR10 * meta) { meta->RedPrimary[0] = fraction_to_uint (m->Rx_n, m->Rx_d, 50000); meta->RedPrimary[1] = fraction_to_uint (m->Ry_n, m->Ry_d, 50000); meta->GreenPrimary[0] = fraction_to_uint (m->Gx_n, m->Gx_d, 50000); meta->GreenPrimary[1] = fraction_to_uint (m->Gy_n, m->Gy_d, 50000); meta->BluePrimary[0] = fraction_to_uint (m->Bx_n, m->Bx_d, 50000); meta->BluePrimary[1] = fraction_to_uint (m->By_n, m->By_d, 50000); meta->WhitePoint[0] = fraction_to_uint (m->Wx_n, m->Wx_d, 50000); meta->WhitePoint[1] = fraction_to_uint (m->Wy_n, m->Wy_d, 50000); meta->MaxMasteringLuminance = fraction_to_uint (m->max_luma_n, m->max_luma_d, 1); meta->MinMasteringLuminance = fraction_to_uint (m->min_luma_n, m->min_luma_d, 1); meta->MaxContentLightLevel = fraction_to_uint (c->maxCLL_n, c->maxCLL_d, 1); meta->MaxFrameAverageLightLevel = fraction_to_uint (c->maxFALL_n, c->maxFALL_d, 1); } /* missing in mingw header... */ typedef enum { GST_DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709 = 0, GST_DXGI_COLOR_SPACE_RGB_FULL_G10_NONE_P709 = 1, GST_DXGI_COLOR_SPACE_RGB_STUDIO_G22_NONE_P709 = 2, GST_DXGI_COLOR_SPACE_RGB_STUDIO_G22_NONE_P2020 = 3, GST_DXGI_COLOR_SPACE_RESERVED = 4, GST_DXGI_COLOR_SPACE_YCBCR_FULL_G22_NONE_P709_X601 = 5, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G22_LEFT_P601 = 6, GST_DXGI_COLOR_SPACE_YCBCR_FULL_G22_LEFT_P601 = 7, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G22_LEFT_P709 = 8, GST_DXGI_COLOR_SPACE_YCBCR_FULL_G22_LEFT_P709 = 9, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G22_LEFT_P2020 = 10, GST_DXGI_COLOR_SPACE_YCBCR_FULL_G22_LEFT_P2020 = 11, GST_DXGI_COLOR_SPACE_RGB_FULL_G2084_NONE_P2020 = 12, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G2084_LEFT_P2020 = 13, GST_DXGI_COLOR_SPACE_RGB_STUDIO_G2084_NONE_P2020 = 14, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G22_TOPLEFT_P2020 = 15, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G2084_TOPLEFT_P2020 = 16, GST_DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P2020 = 17, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_GHLG_TOPLEFT_P2020 = 18, GST_DXGI_COLOR_SPACE_YCBCR_FULL_GHLG_TOPLEFT_P2020 = 19, GST_DXGI_COLOR_SPACE_RGB_STUDIO_G24_NONE_P709 = 20, GST_DXGI_COLOR_SPACE_RGB_STUDIO_G24_NONE_P2020 = 21, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G24_LEFT_P709 = 22, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G24_LEFT_P2020 = 23, GST_DXGI_COLOR_SPACE_YCBCR_STUDIO_G24_TOPLEFT_P2020 = 24, GST_DXGI_COLOR_SPACE_CUSTOM = 0xFFFFFFFF } GST_DXGI_COLOR_SPACE_TYPE; typedef struct { GST_DXGI_COLOR_SPACE_TYPE type; GstVideoColorRange range; GstVideoTransferFunction transfer; GstVideoColorPrimaries primaries; } DxgiColorSpaceMap; /* https://docs.microsoft.com/en-us/windows/win32/api/dxgicommon/ne-dxgicommon-dxgi_color_space_type */ static const DxgiColorSpaceMap colorspace_map[] = { /* RGB, bt709 */ {GST_DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709, GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_TRANSFER_BT709, GST_VIDEO_COLOR_PRIMARIES_BT709}, {GST_DXGI_COLOR_SPACE_RGB_FULL_G10_NONE_P709, GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_TRANSFER_GAMMA10, GST_VIDEO_COLOR_PRIMARIES_BT709}, {GST_DXGI_COLOR_SPACE_RGB_STUDIO_G22_NONE_P709, GST_VIDEO_COLOR_RANGE_16_235, GST_VIDEO_TRANSFER_BT709, GST_VIDEO_COLOR_PRIMARIES_BT709}, /* RGB, bt2020 */ {GST_DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P2020, GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_TRANSFER_BT2020_10, GST_VIDEO_COLOR_PRIMARIES_BT2020}, {GST_DXGI_COLOR_SPACE_RGB_STUDIO_G22_NONE_P2020, GST_VIDEO_COLOR_RANGE_16_235, GST_VIDEO_TRANSFER_BT2020_10, GST_VIDEO_COLOR_PRIMARIES_BT2020}, /* RGB, bt2084 */ {GST_DXGI_COLOR_SPACE_RGB_FULL_G2084_NONE_P2020, GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_TRANSFER_SMPTE2084, GST_VIDEO_COLOR_PRIMARIES_BT2020}, {GST_DXGI_COLOR_SPACE_RGB_STUDIO_G2084_NONE_P2020, GST_VIDEO_COLOR_RANGE_16_235, GST_VIDEO_TRANSFER_SMPTE2084, GST_VIDEO_COLOR_PRIMARIES_BT2020}, /* RGB, SRGB */ {GST_DXGI_COLOR_SPACE_RGB_STUDIO_G24_NONE_P709, GST_VIDEO_COLOR_RANGE_16_235, GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT709}, {GST_DXGI_COLOR_SPACE_RGB_STUDIO_G24_NONE_P2020, GST_VIDEO_COLOR_RANGE_16_235, GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT2020}, }; static gboolean gst_d3d11_window_color_space_from_video_info (GstD3D11Window * self, GstVideoInfo * info, IDXGISwapChain4 * swapchain, GST_DXGI_COLOR_SPACE_TYPE * dxgi_colorspace) { gint i; gint best_idx = -1; gint best_score = 0; g_return_val_if_fail (info != NULL, FALSE); g_return_val_if_fail (dxgi_colorspace != NULL, FALSE); /* We render only RGB for now */ if (!GST_VIDEO_FORMAT_INFO_IS_RGB (info->finfo)) return FALSE; /* find the best matching colorspace */ for (i = 0; i < G_N_ELEMENTS (colorspace_map); i++) { GstVideoColorimetry *cinfo = &info->colorimetry; UINT can_support = 0; HRESULT hr; gint score = 0; GstVideoTransferFunction transfer = cinfo->transfer; if (transfer == GST_VIDEO_TRANSFER_BT2020_12) transfer = GST_VIDEO_TRANSFER_BT2020_10; hr = IDXGISwapChain4_CheckColorSpaceSupport (swapchain, colorspace_map[i].type, &can_support); if (SUCCEEDED (hr) && (can_support & DXGI_SWAP_CHAIN_COLOR_SPACE_SUPPORT_FLAG_PRESENT) == DXGI_SWAP_CHAIN_COLOR_SPACE_SUPPORT_FLAG_PRESENT) { if (cinfo->range == colorspace_map[i].range) score++; if (transfer == colorspace_map[i].transfer) score++; if (cinfo->primaries == colorspace_map[i].primaries) score++; GST_DEBUG_OBJECT (self, "colorspace %d supported, score %d", colorspace_map[i].type, score); if (score > best_score) { best_score = score; best_idx = i; } } else { GST_DEBUG_OBJECT (self, "colorspace %d not supported", colorspace_map[i].type); } } if (best_idx < 0) return FALSE; *dxgi_colorspace = colorspace_map[best_idx].type; return TRUE; } #endif gboolean gst_d3d11_window_prepare (GstD3D11Window * window, guint width, guint height, guint aspect_ratio_n, guint aspect_ratio_d, GstCaps * caps, gboolean * do_convert, GError ** error) { DXGI_SWAP_CHAIN_DESC desc = { 0, }; GstCaps *render_caps; #if defined(HAVE_DXGI_1_5_H) gboolean have_cll = FALSE; gboolean have_mastering = FALSE; gboolean swapchain4_available = FALSE; #endif g_return_val_if_fail (GST_IS_D3D11_WINDOW (window), FALSE); g_return_val_if_fail (aspect_ratio_n > 0, FALSE); g_return_val_if_fail (aspect_ratio_d > 0, FALSE); g_return_val_if_fail (do_convert != NULL, FALSE); GST_DEBUG_OBJECT (window, "Prepare window with %dx%d caps %" GST_PTR_FORMAT, width, height, caps); render_caps = gst_d3d11_device_get_supported_caps (window->device, D3D11_FORMAT_SUPPORT_TEXTURE2D | D3D11_FORMAT_SUPPORT_DISPLAY); GST_DEBUG_OBJECT (window, "rendering caps %" GST_PTR_FORMAT, render_caps); render_caps = gst_d3d11_caps_fixate_format (caps, render_caps); if (!render_caps || gst_caps_is_empty (render_caps)) { GST_ERROR_OBJECT (window, "Couldn't define render caps"); g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED, "Couldn't define render caps"); gst_clear_caps (&render_caps); return FALSE; } render_caps = gst_caps_fixate (render_caps); gst_video_info_from_caps (&window->render_info, render_caps); gst_clear_caps (&render_caps); window->render_format = gst_d3d11_format_from_gst (GST_VIDEO_INFO_FORMAT (&window->render_info)); if (!window->render_format || window->render_format->dxgi_format == DXGI_FORMAT_UNKNOWN) { GST_ERROR_OBJECT (window, "Unknown dxgi render format"); g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED, "Unknown dxgi render format"); return FALSE; } gst_video_info_from_caps (&window->info, caps); if (window->converter) gst_d3d11_color_converter_free (window->converter); window->converter = NULL; /* preserve upstream colorimetry */ window->render_info.colorimetry.primaries = window->info.colorimetry.primaries; window->render_info.colorimetry.transfer = window->info.colorimetry.transfer; if (GST_VIDEO_INFO_FORMAT (&window->info) != GST_VIDEO_INFO_FORMAT (&window->render_info)) { window->converter = gst_d3d11_color_converter_new (window->device, &window->info, &window->render_info); if (!window->converter) { GST_ERROR_OBJECT (window, "Cannot create converter"); g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED, "Cannot create converter"); return FALSE; } } #if defined(HAVE_DXGI_1_5_H) if (!gst_video_content_light_level_from_caps (&window->content_light_level, caps)) { gst_video_content_light_level_init (&window->content_light_level); } else { have_cll = TRUE; } if (!gst_video_mastering_display_info_from_caps (&window->mastering_display_info, caps)) { gst_video_mastering_display_info_init (&window->mastering_display_info); } else { have_mastering = TRUE; } if (gst_d3d11_device_get_chosen_dxgi_factory_version (window->device) >= GST_D3D11_DXGI_FACTORY_5) { GST_DEBUG_OBJECT (window, "DXGI 1.5 interface is available"); swapchain4_available = TRUE; } #endif if (window->swap_chain) { gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_release_resources, window); } window->aspect_ratio_n = aspect_ratio_n; window->aspect_ratio_d = aspect_ratio_d; window->render_rect.x = 0; window->render_rect.y = 0; window->render_rect.w = width; window->render_rect.h = height; if (window->external_win_id) { RECT client_rect = { 0, }; GetClientRect (window->external_win_id, &client_rect); window->surface_width = client_rect.right - client_rect.left; window->surface_height = client_rect.bottom - client_rect.top; } else { window->surface_width = width; window->surface_height = height; } desc.BufferDesc.Width = window->width = window->surface_width; desc.BufferDesc.Height = window->height = window->surface_height; /* don't care refresh rate */ desc.BufferDesc.RefreshRate.Numerator = 0; desc.BufferDesc.RefreshRate.Denominator = 1; desc.BufferDesc.Format = window->render_format->dxgi_format; desc.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED; desc.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED; desc.SampleDesc.Count = 1; desc.SampleDesc.Quality = 0; desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT; desc.BufferCount = 2; desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD; #if defined(HAVE_DXGI_1_5_H) /* For non-DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709 color space support, * DXGI_SWAP_EFFECT_FLIP_DISCARD instead of DXGI_SWAP_EFFECT_DISCARD */ if (swapchain4_available) desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD; #endif desc.OutputWindow = window->internal_win_id; desc.Windowed = TRUE; desc.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH; window->swap_chain = gst_d3d11_device_create_swap_chain (window->device, &desc); if (!window->swap_chain) { GST_ERROR_OBJECT (window, "Cannot create swapchain"); g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED, "Cannot create swapchain"); return FALSE; } #if defined(HAVE_DXGI_1_5_H) if (swapchain4_available) { HRESULT hr; GST_DXGI_COLOR_SPACE_TYPE ctype; if (gst_d3d11_window_color_space_from_video_info (window, &window->render_info, (IDXGISwapChain4 *) window->swap_chain, &ctype)) { hr = IDXGISwapChain4_SetColorSpace1 ((IDXGISwapChain4 *) window->swap_chain, (DXGI_COLOR_SPACE_TYPE) ctype); if (!gst_d3d11_result (hr)) { GST_WARNING_OBJECT (window, "Failed to set colorspace %d, hr: 0x%x", ctype, (guint) hr); } else { GST_DEBUG_OBJECT (window, "Set colorspace %d", ctype); } if (have_cll && have_mastering) { DXGI_HDR_METADATA_HDR10 metadata = { 0, }; GST_DEBUG_OBJECT (window, "Have HDR metadata, set to DXGI swapchain"); mastering_display_gst_to_dxgi (&window->mastering_display_info, &window->content_light_level, &metadata); hr = IDXGISwapChain4_SetHDRMetaData ((IDXGISwapChain4 *) window->swap_chain, DXGI_HDR_METADATA_TYPE_HDR10, sizeof (DXGI_HDR_METADATA_HDR10), &metadata); if (!gst_d3d11_result (hr)) { GST_WARNING_OBJECT (window, "Couldn't set HDR metadata, hr 0x%x", (guint) hr); } } } else { GST_DEBUG_OBJECT (window, "Could not get color space from %" GST_PTR_FORMAT, caps); } } #endif gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_on_resize, window); if (!window->rtv) { gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_release_resources, window); GST_ERROR_OBJECT (window, "Failed to setup internal resources"); g_set_error (error, GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED, "Failed to setup internal resources"); return FALSE; } GST_DEBUG_OBJECT (window, "New swap chain 0x%p created", window->swap_chain); *do_convert = ! !window->converter; return TRUE; } void gst_d3d11_window_set_window_handle (GstD3D11Window * window, guintptr id) { g_return_if_fail (GST_IS_D3D11_WINDOW (window)); window->overlay_state = GST_D3D11_WINDOW_OVERLAY_STATE_NONE; if (window->visible) { ShowWindow (window->internal_win_id, SW_HIDE); window->visible = FALSE; } release_external_win_id (window); window->external_win_id = (HWND) id; set_external_win_id (window); if (window->external_win_id) window->overlay_state = GST_D3D11_WINDOW_OVERLAY_STATE_OPENED; } void gst_d3d11_window_show (GstD3D11Window * window) { gint width, height; g_return_if_fail (GST_IS_D3D11_WINDOW (window)); width = window->width; height = window->height; if (!window->visible) { /* if no parent the real size has to be set now because this has not been done * when at window creation */ if (!window->external_win_id) { RECT rect; GetClientRect (window->internal_win_id, &rect); width += 2 * GetSystemMetrics (SM_CXSIZEFRAME); height += 2 * GetSystemMetrics (SM_CYSIZEFRAME) + GetSystemMetrics (SM_CYCAPTION); MoveWindow (window->internal_win_id, rect.left, rect.top, width, height, FALSE); } ShowWindow (window->internal_win_id, SW_SHOW); window->visible = TRUE; } } void gst_d3d11_window_set_render_rectangle (GstD3D11Window * window, gint x, gint y, gint width, gint height) { g_return_if_fail (GST_IS_D3D11_WINDOW (window)); if (x < 0 || y < 0) { x = y = 0; width = window->surface_width; height = window->surface_height; } if (x < 0 || y < 0 || width <= 0 || height <= 0) return; /* TODO: resize window and view */ } void gst_d3d11_window_get_surface_dimensions (GstD3D11Window * window, guint * width, guint * height) { g_return_if_fail (GST_IS_D3D11_WINDOW (window)); if (width) *width = window->surface_width; if (height) *height = window->surface_height; } static void _present_on_device_thread (GstD3D11Device * device, FramePresentData * data) { GstD3D11Window *self = data->window; ID3D11DeviceContext *device_context; HRESULT hr; float black[] = { 0.0f, 0.0f, 0.0f, 0.0f }; D3D11_BOX src_box; device_context = gst_d3d11_device_get_device_context_handle (device); gst_buffer_replace (&self->cached_buffer, data->buffer); if (self->cached_buffer) { if (self->converter) { ID3D11ShaderResourceView *srv[GST_VIDEO_MAX_PLANES]; gint i, j, k; RECT rect; for (i = 0, j = 0; i < gst_buffer_n_memory (self->cached_buffer); i++) { GstD3D11Memory *mem = (GstD3D11Memory *) gst_buffer_peek_memory (self->cached_buffer, i); for (k = 0; k < mem->num_shader_resource_views; k++) { srv[j] = mem->shader_resource_view[k]; j++; } } rect.left = self->render_rect.x; rect.right = self->render_rect.x + self->render_rect.w; rect.top = self->render_rect.y; rect.bottom = self->render_rect.y + self->render_rect.h; gst_d3d11_color_converter_update_rect (self->converter, &rect); gst_d3d11_color_converter_convert (self->converter, srv, &self->rtv); } else { GstD3D11Memory *mem = (GstD3D11Memory *) gst_buffer_peek_memory (self->cached_buffer, 0); self->rect = *data->rect; src_box.left = self->rect.x; src_box.right = self->rect.x + self->rect.w; src_box.top = self->rect.y; src_box.bottom = self->rect.y + self->rect.h; src_box.front = 0; src_box.back = 1; ID3D11DeviceContext_OMSetRenderTargets (device_context, 1, &self->rtv, NULL); ID3D11DeviceContext_ClearRenderTargetView (device_context, self->rtv, black); ID3D11DeviceContext_CopySubresourceRegion (device_context, (ID3D11Resource *) self->backbuffer, 0, self->render_rect.x, self->render_rect.y, 0, (ID3D11Resource *) mem->texture, 0, &src_box); } } hr = IDXGISwapChain_Present (self->swap_chain, 0, DXGI_PRESENT_DO_NOT_WAIT); if (!gst_d3d11_result (hr)) { GST_WARNING_OBJECT (self, "Direct3D cannot present texture, hr: 0x%x", (guint) hr); } data->ret = GST_FLOW_OK; } GstFlowReturn gst_d3d11_window_render (GstD3D11Window * window, GstBuffer * buffer, GstVideoRectangle * rect) { FramePresentData data; GstMemory *mem; g_return_val_if_fail (GST_IS_D3D11_WINDOW (window), GST_FLOW_ERROR); g_return_val_if_fail (rect != NULL, GST_FLOW_ERROR); mem = gst_buffer_peek_memory (buffer, 0); if (!gst_is_d3d11_memory (mem)) { GST_ERROR_OBJECT (window, "Invalid buffer"); return GST_FLOW_ERROR; } g_mutex_lock (&window->lock); if ((!window->external_win_id && window->overlay_state == GST_D3D11_WINDOW_OVERLAY_STATE_CLOSED) || !window->internal_win_id) { GST_ERROR_OBJECT (window, "Output window was closed"); g_mutex_unlock (&window->lock); return GST_D3D11_WINDOW_FLOW_CLOSED; } g_mutex_unlock (&window->lock); GST_OBJECT_LOCK (window); if (rect->w != window->width || rect->h != window->height || window->pending_resize) { window->width = rect->w; window->height = rect->h; gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_on_resize, window); } GST_OBJECT_UNLOCK (window); data.window = window; data.rect = rect; data.buffer = buffer; data.ret = GST_FLOW_OK; gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) _present_on_device_thread, &data); return data.ret; } static void gst_d3d11_window_flush_internal (GstD3D11Device * device, GstD3D11Window * window) { gst_clear_buffer (&window->cached_buffer); } gboolean gst_d3d11_window_flush (GstD3D11Window * window) { g_return_val_if_fail (GST_IS_D3D11_WINDOW (window), FALSE); gst_d3d11_device_thread_add (window->device, (GstD3D11DeviceThreadFunc) gst_d3d11_window_flush_internal, window); return TRUE; }