/* * GStreamer * Copyright (C) 2020 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. */ /** * SECTION:element-d3d11screencapturesrc * @title: d3d11screencapturesrc * * A DXGI Desktop Duplication API based screen capture element * * ## Example launch line * ``` * gst-launch-1.0 d3d11screencapturesrc ! queue ! d3d11videosink * ``` * * Since: 1.20 */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gstd3d11screencapturesrc.h" #include "gstd3d11dxgicapture.h" #ifdef HAVE_WINRT_CAPTURE #include "gstd3d11winrtcapture.h" #endif #include "gstd3d11pluginutils.h" #include #include /* *INDENT-OFF* */ using namespace Microsoft::WRL; /* *INDENT-ON* */ GST_DEBUG_CATEGORY_EXTERN (gst_d3d11_screen_capture_debug); #define GST_CAT_DEFAULT gst_d3d11_screen_capture_debug enum { PROP_0, PROP_MONITOR_INDEX, PROP_MONITOR_HANDLE, PROP_SHOW_CURSOR, PROP_CROP_X, PROP_CROP_Y, PROP_CROP_WIDTH, PROP_CROP_HEIGHT, PROP_WINDOW_HANDLE, PROP_SHOW_BORDER, PROP_CAPTURE_API, PROP_ADAPTER, }; typedef enum { GST_D3D11_SCREEN_CAPTURE_API_DXGI, GST_D3D11_SCREEN_CAPTURE_API_WGC, } GstD3D11ScreenCaptureAPI; #ifdef HAVE_WINRT_CAPTURE /** * GstD3D11ScreenCaptureAPI: * * Since: 1.22 */ #define GST_TYPE_D3D11_SCREEN_CAPTURE_API (gst_d3d11_screen_capture_api_get_type()) static GType gst_d3d11_screen_capture_api_get_type (void) { static GType api_type = 0; GST_D3D11_CALL_ONCE_BEGIN { static const GEnumValue api_types[] = { /** * GstD3D11ScreenCaptureAPI::dxgi: * * Since: 1.22 */ {GST_D3D11_SCREEN_CAPTURE_API_DXGI, "DXGI Desktop Duplication", "dxgi"}, /** * GstD3D11ScreenCaptureAPI::wgc: * * Since: 1.22 */ {GST_D3D11_SCREEN_CAPTURE_API_WGC, "Windows Graphics Capture", "wgc"}, {0, nullptr, nullptr}, }; api_type = g_enum_register_static ("GstD3D11ScreenCaptureAPI", api_types); } GST_D3D11_CALL_ONCE_END; return api_type; } #endif #define DEFAULT_MONITOR_INDEX -1 #define DEFAULT_SHOW_CURSOR FALSE #define DEFAULT_SHOW_BORDER FALSE #define DEFAULT_CAPTURE_API GST_D3D11_SCREEN_CAPTURE_API_DXGI #define DEFAULT_ADAPTER -1 static GstStaticCaps template_caps = GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY, "BGRA") ", pixel-aspect-ratio = 1/1;" GST_VIDEO_CAPS_MAKE ("BGRA") ", pixel-aspect-ratio = 1/1"); struct _GstD3D11ScreenCaptureSrc { GstBaseSrc src; guint64 last_frame_no; GstClockID clock_id; GstVideoInfo video_info; GstD3D11Device *device; GstD3D11ScreenCapture *capture; GstBufferPool *pool; gint64 adapter_luid; gint monitor_index; HMONITOR monitor_handle; HWND window_handle; gboolean show_cursor; gboolean show_border; GstD3D11ScreenCaptureAPI capture_api; gint adapter; guint crop_x; guint crop_y; guint crop_w; guint crop_h; D3D11_BOX crop_box; gboolean flushing; GstClockTime min_latency; GstClockTime max_latency; gboolean downstream_supports_d3d11; ID3D11VertexShader *vs; ID3D11PixelShader *ps; ID3D11InputLayout *layout; ID3D11SamplerState *sampler; ID3D11BlendState *blend; CRITICAL_SECTION lock; }; static void gst_d3d11_screen_capture_src_dispose (GObject * object); static void gst_d3d11_screen_capture_src_finalize (GObject * object); static void gst_d3d11_screen_capture_src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_d3d11_screen_capture_src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_d3d11_screen_capture_src_set_context (GstElement * element, GstContext * context); static GstCaps *gst_d3d11_screen_capture_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter); static GstCaps *gst_d3d11_screen_capture_src_fixate (GstBaseSrc * bsrc, GstCaps * caps); static gboolean gst_d3d11_screen_capture_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps); static gboolean gst_d3d11_screen_capture_src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query); static gboolean gst_d3d11_screen_capture_src_start (GstBaseSrc * bsrc); static gboolean gst_d3d11_screen_capture_src_stop (GstBaseSrc * bsrc); static gboolean gst_d3d11_screen_capture_src_unlock (GstBaseSrc * bsrc); static gboolean gst_d3d11_screen_capture_src_unlock_stop (GstBaseSrc * bsrc); static gboolean gst_d3d11_screen_capture_src_src_query (GstBaseSrc * bsrc, GstQuery * query); static GstFlowReturn gst_d3d11_screen_capture_src_create (GstBaseSrc * bsrc, guint64 offset, guint size, GstBuffer ** buf); #define gst_d3d11_screen_capture_src_parent_class parent_class G_DEFINE_TYPE (GstD3D11ScreenCaptureSrc, gst_d3d11_screen_capture_src, GST_TYPE_BASE_SRC); static void gst_d3d11_screen_capture_src_class_init (GstD3D11ScreenCaptureSrcClass * klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstBaseSrcClass *basesrc_class = GST_BASE_SRC_CLASS (klass); GstCaps *caps; gobject_class->dispose = gst_d3d11_screen_capture_src_dispose; gobject_class->finalize = gst_d3d11_screen_capture_src_finalize; gobject_class->set_property = gst_d3d11_screen_capture_src_set_property; gobject_class->get_property = gst_d3d11_screen_capture_src_get_property; g_object_class_install_property (gobject_class, PROP_MONITOR_INDEX, g_param_spec_int ("monitor-index", "Monitor Index", "Zero-based index for monitor to capture (-1 = primary monitor)", -1, G_MAXINT, DEFAULT_MONITOR_INDEX, (GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_MONITOR_HANDLE, g_param_spec_uint64 ("monitor-handle", "Monitor Handle", "A HMONITOR handle of monitor to capture", 0, G_MAXUINT64, 0, (GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY | G_PARAM_STATIC_STRINGS))); g_object_class_install_property (gobject_class, PROP_SHOW_CURSOR, g_param_spec_boolean ("show-cursor", "Show Mouse Cursor", "Whether to show mouse cursor", DEFAULT_SHOW_CURSOR, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:crop-x: * * Horizontal coordinate of top left corner for the screen capture area * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_CROP_X, g_param_spec_uint ("crop-x", "Crop X", "Horizontal coordinate of top left corner for the screen capture area", 0, G_MAXUINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:crop-y: * * Vertical coordinate of top left corner for the screen capture area * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_CROP_Y, g_param_spec_uint ("crop-y", "Crop Y", "Vertical coordinate of top left corner for the screen capture area", 0, G_MAXUINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:crop-width: * * Width of screen capture area (0 = maximum) * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_CROP_WIDTH, g_param_spec_uint ("crop-width", "Crop Width", "Width of screen capture area (0 = maximum)", 0, G_MAXUINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:crop-height: * * Height of screen capture area (0 = maximum) * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_CROP_HEIGHT, g_param_spec_uint ("crop-height", "Crop Height", "Height of screen capture area (0 = maximum)", 0, G_MAXUINT, 0, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); #ifdef HAVE_WINRT_CAPTURE if (gst_d3d11_winrt_capture_load_library ()) { /** * GstD3D11ScreenCaptureSrc:window-handle: * * HWND window handle to capture * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_WINDOW_HANDLE, g_param_spec_uint64 ("window-handle", "Window Handle", "A HWND handle of window to capture", 0, G_MAXUINT64, 0, (GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY | GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:show-border: * * Show border lines to capture area when WGC mode is selected. * This feature requires Windows11 or newer * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_SHOW_BORDER, g_param_spec_boolean ("show-border", "Show Border", "Show border lines to capture area when WGC mode is selected", DEFAULT_SHOW_BORDER, (GParamFlags) (GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS))); /** * GstD3D11ScreenCaptureSrc:capture-api: * * Capture API to use * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_CAPTURE_API, g_param_spec_enum ("capture-api", "Capture API", "Capture API to use", GST_TYPE_D3D11_SCREEN_CAPTURE_API, DEFAULT_CAPTURE_API, (GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY | GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_STATIC_STRINGS))); gst_type_mark_as_plugin_api (GST_TYPE_D3D11_SCREEN_CAPTURE_API, (GstPluginAPIFlags) 0); /** * GstD3D11ScreenCaptureSrc:adapter: * * DXGI Adapter index for creating device when WGC mode is selected * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_ADAPTER, g_param_spec_int ("adapter", "Adapter", "DXGI Adapter index for creating device when WGC mode is selected " "(-1 for default)", -1, G_MAXINT32, DEFAULT_ADAPTER, (GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY | GST_PARAM_CONDITIONALLY_AVAILABLE | G_PARAM_STATIC_STRINGS))); } #endif element_class->set_context = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_set_context); gst_element_class_set_static_metadata (element_class, "Direct3D11 screen capture src", "Source/Video", "Captures desktop screen", "Seungha Yang "); caps = gst_d3d11_get_updated_template_caps (&template_caps); gst_element_class_add_pad_template (element_class, gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps)); gst_caps_unref (caps); basesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_get_caps); basesrc_class->fixate = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_fixate); basesrc_class->set_caps = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_set_caps); basesrc_class->decide_allocation = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_decide_allocation); basesrc_class->start = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_start); basesrc_class->stop = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_stop); basesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_unlock); basesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_unlock_stop); basesrc_class->query = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_src_query); basesrc_class->create = GST_DEBUG_FUNCPTR (gst_d3d11_screen_capture_src_create); } static void gst_d3d11_screen_capture_src_init (GstD3D11ScreenCaptureSrc * self) { gst_base_src_set_live (GST_BASE_SRC (self), TRUE); gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME); self->monitor_index = DEFAULT_MONITOR_INDEX; self->show_cursor = DEFAULT_SHOW_CURSOR; self->show_border = DEFAULT_SHOW_BORDER; self->capture_api = DEFAULT_CAPTURE_API; self->adapter = DEFAULT_ADAPTER; self->min_latency = GST_CLOCK_TIME_NONE; self->max_latency = GST_CLOCK_TIME_NONE; InitializeCriticalSection (&self->lock); } static void gst_d3d11_screen_capture_src_dispose (GObject * object) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (object); gst_clear_object (&self->capture); gst_clear_object (&self->device); G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_d3d11_screen_capture_src_finalize (GObject * object) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (object); DeleteCriticalSection (&self->lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_d3d11_screen_capture_src_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (object); GstD3D11CSLockGuard lk (&self->lock); switch (prop_id) { case PROP_MONITOR_INDEX: self->monitor_index = g_value_get_int (value); break; case PROP_MONITOR_HANDLE: self->monitor_handle = (HMONITOR) g_value_get_uint64 (value); break; case PROP_SHOW_CURSOR: self->show_cursor = g_value_get_boolean (value); break; case PROP_CROP_X: self->crop_x = g_value_get_uint (value); break; case PROP_CROP_Y: self->crop_y = g_value_get_uint (value); break; case PROP_CROP_WIDTH: self->crop_w = g_value_get_uint (value); break; case PROP_CROP_HEIGHT: self->crop_h = g_value_get_uint (value); break; case PROP_WINDOW_HANDLE: self->window_handle = (HWND) g_value_get_uint64 (value); break; case PROP_SHOW_BORDER: self->show_border = g_value_get_boolean (value); if (self->capture) gst_d3d11_screen_capture_show_border (self->capture, self->show_border); break; case PROP_CAPTURE_API: self->capture_api = (GstD3D11ScreenCaptureAPI) g_value_get_enum (value); break; case PROP_ADAPTER: self->adapter = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; }; } static void gst_d3d11_screen_capture_src_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (object); switch (prop_id) { case PROP_MONITOR_INDEX: g_value_set_int (value, self->monitor_index); break; case PROP_MONITOR_HANDLE: g_value_set_uint64 (value, (guint64) self->monitor_handle); break; case PROP_SHOW_CURSOR: g_value_set_boolean (value, self->show_cursor); break; case PROP_CROP_X: g_value_set_uint (value, self->crop_x); break; case PROP_CROP_Y: g_value_set_uint (value, self->crop_y); break; case PROP_CROP_WIDTH: g_value_set_uint (value, self->crop_w); break; case PROP_CROP_HEIGHT: g_value_set_uint (value, self->crop_h); break; case PROP_WINDOW_HANDLE: g_value_set_uint64 (value, (guint64) self->window_handle); break; case PROP_SHOW_BORDER: g_value_set_boolean (value, self->show_border); break; case PROP_CAPTURE_API: g_value_set_enum (value, self->capture_api); break; case PROP_ADAPTER: g_value_set_int (value, self->adapter); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; }; } static void gst_d3d11_screen_capture_src_set_context (GstElement * element, GstContext * context) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (element); GstD3D11CSLockGuard lk (&self->lock); if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_DXGI) { gst_d3d11_handle_set_context_for_adapter_luid (element, context, self->adapter_luid, &self->device); } else { gst_d3d11_handle_set_context (element, context, self->adapter, &self->device); } GST_ELEMENT_CLASS (parent_class)->set_context (element, context); } static D3D11_BOX gst_d3d11_screen_capture_src_get_crop_box (GstD3D11ScreenCaptureSrc * self) { D3D11_BOX box; guint screen_width, screen_height; box.front = 0; box.back = 1; gst_d3d11_screen_capture_get_size (self->capture, &screen_width, &screen_height); if ((self->crop_x + self->crop_w) > screen_width || (self->crop_y + self->crop_h) > screen_height) { GST_WARNING ("Capture region outside of the screen bounds; ignoring."); box.left = 0; box.top = 0; box.right = screen_width; box.bottom = screen_height; } else { box.left = self->crop_x; box.top = self->crop_y; box.right = self->crop_w ? (self->crop_x + self->crop_w) : screen_width; box.bottom = self->crop_h ? (self->crop_y + self->crop_h) : screen_height; } return box; } static GstCaps * gst_d3d11_screen_capture_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GstCaps *caps = NULL; guint width, height; GstVideoColorimetry color; if (!self->capture) { GST_DEBUG_OBJECT (self, "capture object is not configured yet"); return gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (bsrc)); } self->crop_box = gst_d3d11_screen_capture_src_get_crop_box (self); width = self->crop_box.right - self->crop_box.left; height = self->crop_box.bottom - self->crop_box.top; caps = gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (bsrc)); caps = gst_caps_make_writable (caps); gst_caps_set_simple (caps, "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, nullptr); if (gst_d3d11_screen_capture_get_colorimetry (self->capture, &color)) { gchar *color_str = gst_video_colorimetry_to_string (&color); if (color_str) { gst_caps_set_simple (caps, "colorimetry", G_TYPE_STRING, color_str, nullptr); g_free (color_str); } } if (filter) { GstCaps *tmp = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST); gst_caps_unref (caps); caps = tmp; } return caps; } static GstCaps * gst_d3d11_screen_capture_src_fixate (GstBaseSrc * bsrc, GstCaps * caps) { guint size; GstCaps *d3d11_caps = nullptr; caps = gst_caps_make_writable (caps); size = gst_caps_get_size (caps); for (guint i = 0; i < size; i++) { GstStructure *s; s = gst_caps_get_structure (caps, i); gst_structure_fixate_field_nearest_fraction (s, "framerate", 30, 1); if (!d3d11_caps) { GstCapsFeatures *features; features = gst_caps_get_features (caps, i); if (features && gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY)) { d3d11_caps = gst_caps_new_empty (); gst_caps_append_structure (d3d11_caps, gst_structure_copy (s)); gst_caps_set_features (d3d11_caps, 0, gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY, nullptr)); break; } } } if (d3d11_caps) { gst_caps_unref (caps); caps = d3d11_caps; } return gst_caps_fixate (caps); } static gboolean gst_d3d11_screen_capture_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GstCapsFeatures *features; GST_DEBUG_OBJECT (self, "Set caps %" GST_PTR_FORMAT, caps); features = gst_caps_get_features (caps, 0); if (features && gst_caps_features_contains (features, GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY)) { self->downstream_supports_d3d11 = TRUE; } else { self->downstream_supports_d3d11 = FALSE; } gst_video_info_from_caps (&self->video_info, caps); gst_base_src_set_blocksize (bsrc, GST_VIDEO_INFO_SIZE (&self->video_info)); return TRUE; } static gboolean gst_d3d11_screen_capture_src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GstBufferPool *pool = NULL; GstStructure *config; GstD3D11AllocationParams *d3d11_params; GstCaps *caps; guint min, max, size; gboolean update_pool; GstVideoInfo vinfo; if (self->pool) { gst_buffer_pool_set_active (self->pool, FALSE); gst_clear_object (&self->pool); } gst_query_parse_allocation (query, &caps, NULL); if (!caps) { GST_ERROR_OBJECT (self, "No output caps"); return FALSE; } gst_video_info_from_caps (&vinfo, caps); if (gst_query_get_n_allocation_pools (query) > 0) { gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); update_pool = TRUE; } else { size = GST_VIDEO_INFO_SIZE (&vinfo); min = max = 0; update_pool = FALSE; } if (pool && self->downstream_supports_d3d11) { if (!GST_IS_D3D11_BUFFER_POOL (pool)) { gst_clear_object (&pool); } else { GstD3D11BufferPool *dpool = GST_D3D11_BUFFER_POOL (pool); if (dpool->device != self->device) gst_clear_object (&pool); } } if (!pool) { if (self->downstream_supports_d3d11) pool = gst_d3d11_buffer_pool_new (self->device); else pool = gst_video_buffer_pool_new (); } config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_set_params (config, caps, size, min, max); gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); if (self->downstream_supports_d3d11) { d3d11_params = gst_buffer_pool_config_get_d3d11_allocation_params (config); if (!d3d11_params) { d3d11_params = gst_d3d11_allocation_params_new (self->device, &vinfo, GST_D3D11_ALLOCATION_FLAG_DEFAULT, D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET, 0); } else { d3d11_params->desc[0].BindFlags |= D3D11_BIND_RENDER_TARGET; } gst_buffer_pool_config_set_d3d11_allocation_params (config, d3d11_params); gst_d3d11_allocation_params_free (d3d11_params); } if (!gst_buffer_pool_set_config (pool, config)) { GST_ERROR_OBJECT (self, "Failed to set config"); goto error; } /* d3d11 buffer pool will update buffer size based on allocated texture, * get size from config again */ config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_get_params (config, nullptr, &size, nullptr, nullptr); gst_structure_free (config); if (!self->downstream_supports_d3d11) { self->pool = gst_d3d11_buffer_pool_new (self->device); config = gst_buffer_pool_get_config (self->pool); gst_buffer_pool_config_set_params (config, caps, size, 0, 0); gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); d3d11_params = gst_buffer_pool_config_get_d3d11_allocation_params (config); if (!d3d11_params) { d3d11_params = gst_d3d11_allocation_params_new (self->device, &vinfo, GST_D3D11_ALLOCATION_FLAG_DEFAULT, D3D11_BIND_RENDER_TARGET, 0); } else { d3d11_params->desc[0].BindFlags |= D3D11_BIND_RENDER_TARGET; } gst_buffer_pool_config_set_d3d11_allocation_params (config, d3d11_params); gst_d3d11_allocation_params_free (d3d11_params); if (!gst_buffer_pool_set_config (self->pool, config)) { GST_ERROR_OBJECT (self, "Failed to set config for internal pool"); goto error; } if (!gst_buffer_pool_set_active (self->pool, TRUE)) { GST_ERROR_OBJECT (self, "Failed to activate internal pool"); goto error; } } if (update_pool) gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max); else gst_query_add_allocation_pool (query, pool, size, min, max); gst_object_unref (pool); return TRUE; error: gst_clear_object (&self->pool); gst_clear_object (&pool); return FALSE; } static gboolean gst_d3d11_screen_capture_prepare_shader (GstD3D11ScreenCaptureSrc * self) { /* *INDENT-OFF* */ static const gchar vs_str[] = "struct VS_INPUT {\n" " float4 Position: POSITION;\n" " float2 Texture: TEXCOORD;\n" "};\n" "\n" "struct VS_OUTPUT {\n" " float4 Position: SV_POSITION;\n" " float2 Texture: TEXCOORD;\n" "};\n" "\n" "VS_OUTPUT main (VS_INPUT input)\n" "{\n" " return input;\n" "}"; static const gchar ps_str[] = "Texture2D shaderTexture;\n" "SamplerState samplerState;\n" "\n" "struct PS_INPUT {\n" " float4 Position: SV_POSITION;\n" " float2 Texture: TEXCOORD;\n" "};\n" "\n" "struct PS_OUTPUT {\n" " float4 Plane: SV_Target;\n" "};\n" "\n" "PS_OUTPUT main(PS_INPUT input)\n" "{\n" " PS_OUTPUT output;\n" " output.Plane = shaderTexture.Sample(samplerState, input.Texture);\n" " return output;\n" "}"; /* *INDENT-ON* */ D3D11_INPUT_ELEMENT_DESC input_desc[] = { {"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0}, {"TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D11_INPUT_PER_VERTEX_DATA, 0} }; ComPtr < ID3D11VertexShader > vs; ComPtr < ID3D11InputLayout > layout; ComPtr < ID3D11PixelShader > ps; ComPtr < ID3D11SamplerState > sampler; ComPtr < ID3D11BlendState > blend; D3D11_SAMPLER_DESC sampler_desc; D3D11_BLEND_DESC blend_desc; ID3D11Device *device_handle; HRESULT hr; device_handle = gst_d3d11_device_get_device_handle (self->device); hr = gst_d3d11_create_vertex_shader_simple (self->device, vs_str, "main", input_desc, G_N_ELEMENTS (input_desc), &vs, &layout); if (!gst_d3d11_result (hr, self->device)) { GST_ERROR_OBJECT (self, "Failed to create vertex shader"); return FALSE; } hr = gst_d3d11_create_pixel_shader_simple (self->device, ps_str, "main", &ps); if (!gst_d3d11_result (hr, self->device)) { GST_ERROR_OBJECT (self, "Failed to create pixel shader"); return FALSE; } memset (&sampler_desc, 0, sizeof (D3D11_SAMPLER_DESC)); sampler_desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR; sampler_desc.AddressU = D3D11_TEXTURE_ADDRESS_CLAMP; sampler_desc.AddressV = D3D11_TEXTURE_ADDRESS_CLAMP; sampler_desc.AddressW = D3D11_TEXTURE_ADDRESS_CLAMP; sampler_desc.ComparisonFunc = D3D11_COMPARISON_NEVER; sampler_desc.MinLOD = 0; sampler_desc.MaxLOD = D3D11_FLOAT32_MAX; hr = device_handle->CreateSamplerState (&sampler_desc, &sampler); if (!gst_d3d11_result (hr, self->device)) { GST_ERROR_OBJECT (self, "Failed to create sampler state, hr 0x%x", (guint) hr); return FALSE; } blend_desc.AlphaToCoverageEnable = FALSE; blend_desc.IndependentBlendEnable = FALSE; blend_desc.RenderTarget[0].BlendEnable = TRUE; blend_desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA; blend_desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA; blend_desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD; blend_desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ZERO; blend_desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ONE; blend_desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD; blend_desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL; hr = device_handle->CreateBlendState (&blend_desc, &blend); if (!gst_d3d11_result (hr, self->device)) { GST_ERROR_OBJECT (self, "Failed to create blend state, hr 0x%x", (guint) hr); return FALSE; } self->vs = vs.Detach (); self->ps = ps.Detach (); self->layout = layout.Detach (); self->sampler = sampler.Detach (); self->blend = blend.Detach (); return TRUE; } static gboolean gst_d3d11_screen_capture_src_start (GstBaseSrc * bsrc) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GstFlowReturn ret; HMONITOR monitor = self->monitor_handle; ComPtr < IDXGIAdapter1 > adapter; DXGI_ADAPTER_DESC desc; HRESULT hr; GstD3D11ScreenCapture *capture = nullptr; GstD3D11ScreenCaptureAPI capture_api = self->capture_api; EnterCriticalSection (&self->lock); if (self->window_handle) { self->capture_api = GST_D3D11_SCREEN_CAPTURE_API_WGC; } else { if (monitor) { hr = gst_d3d11_screen_capture_find_output_for_monitor (monitor, &adapter, nullptr); } else if (self->monitor_index < 0) { hr = gst_d3d11_screen_capture_find_primary_monitor (&monitor, &adapter, nullptr); } else { hr = gst_d3d11_screen_capture_find_nth_monitor (self->monitor_index, &monitor, &adapter, nullptr); } if (FAILED (hr)) goto error; } if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_DXGI) { hr = adapter->GetDesc (&desc); if (FAILED (hr)) goto error; self->adapter_luid = gst_d3d11_luid_to_int64 (&desc.AdapterLuid); gst_clear_object (&self->device); gst_d3d11_ensure_element_data_for_adapter_luid (GST_ELEMENT_CAST (self), self->adapter_luid, &self->device); } else { gst_clear_object (&self->device); gst_d3d11_ensure_element_data (GST_ELEMENT_CAST (self), self->adapter, &self->device); } if (!self->device) goto no_device; #ifdef HAVE_WINRT_CAPTURE if (self->window_handle) { capture = gst_d3d11_winrt_capture_new (self->device, nullptr, self->window_handle); } else if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_WGC) { capture = gst_d3d11_winrt_capture_new (self->device, monitor, nullptr); } #endif if (!capture) capture = gst_d3d11_dxgi_capture_new (self->device, monitor); if (!capture) goto error; /* Check if we can open device */ ret = gst_d3d11_screen_capture_prepare (capture); switch (ret) { case GST_D3D11_SCREEN_CAPTURE_FLOW_EXPECTED_ERROR: case GST_FLOW_OK: break; case GST_D3D11_SCREEN_CAPTURE_FLOW_UNSUPPORTED: #ifdef HAVE_WINRT_CAPTURE /* Try WinRT capture if DXGI capture does not work */ if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_DXGI) { self->capture_api = GST_D3D11_SCREEN_CAPTURE_API_WGC; gst_clear_object (&capture); GST_WARNING_OBJECT (self, "DXGI capture is not available"); capture = gst_d3d11_winrt_capture_new (self->device, monitor, nullptr); if (capture && gst_d3d11_screen_capture_prepare (capture) == GST_FLOW_OK) { GST_INFO_OBJECT (self, "Fallback to Windows Graphics Capture"); break; } } #endif goto unsupported; default: goto error; } if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_DXGI && !gst_d3d11_screen_capture_prepare_shader (self)) { goto error; } self->last_frame_no = -1; self->min_latency = self->max_latency = GST_CLOCK_TIME_NONE; gst_d3d11_screen_capture_show_border (capture, self->show_border); self->capture = capture; LeaveCriticalSection (&self->lock); if (self->capture_api != capture_api) { GST_INFO_OBJECT (self, "Updated capture api: %d", self->capture_api); g_object_notify (G_OBJECT (self), "capture-api"); } return TRUE; no_device: { LeaveCriticalSection (&self->lock); GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND, ("D3D11 device is not available"), (nullptr)); return FALSE; } error: { gst_clear_object (&capture); LeaveCriticalSection (&self->lock); GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND, ("Failed to prepare capture object with given configuration, " "monitor-index: %d, monitor-handle: %p, window-handle: %p", self->monitor_index, self->monitor_handle, self->window_handle), (nullptr)); return FALSE; } unsupported: { gst_clear_object (&capture); LeaveCriticalSection (&self->lock); GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ, ("Failed to prepare capture object with given configuration, " "monitor-index: %d, monitor-handle: %p", self->monitor_index, self->monitor_handle), ("Try run the application on the integrated GPU")); return FALSE; } } static gboolean gst_d3d11_screen_capture_src_stop (GstBaseSrc * bsrc) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GstD3D11CSLockGuard lk (&self->lock); if (self->pool) { gst_buffer_pool_set_active (self->pool, FALSE); gst_clear_object (&self->pool); } GST_D3D11_CLEAR_COM (self->vs); GST_D3D11_CLEAR_COM (self->ps); GST_D3D11_CLEAR_COM (self->layout); GST_D3D11_CLEAR_COM (self->sampler); GST_D3D11_CLEAR_COM (self->blend); gst_clear_object (&self->capture); gst_clear_object (&self->device); return TRUE; } static gboolean gst_d3d11_screen_capture_src_unlock (GstBaseSrc * bsrc) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GST_OBJECT_LOCK (self); if (self->capture) gst_d3d11_screen_capture_unlock (self->capture); if (self->clock_id) { GST_DEBUG_OBJECT (self, "Waking up waiting clock"); gst_clock_id_unschedule (self->clock_id); } self->flushing = TRUE; GST_OBJECT_UNLOCK (self); return TRUE; } static gboolean gst_d3d11_screen_capture_src_unlock_stop (GstBaseSrc * bsrc) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); GST_OBJECT_LOCK (self); if (self->capture) gst_d3d11_screen_capture_unlock_stop (self->capture); self->flushing = FALSE; GST_OBJECT_UNLOCK (self); return TRUE; } static gboolean gst_d3d11_screen_capture_src_src_query (GstBaseSrc * bsrc, GstQuery * query) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CONTEXT: if (gst_d3d11_handle_context_query (GST_ELEMENT_CAST (self), query, self->device)) { return TRUE; } break; case GST_QUERY_LATENCY: if (GST_CLOCK_TIME_IS_VALID (self->min_latency)) { gst_query_set_latency (query, TRUE, self->min_latency, self->max_latency); return TRUE; } break; default: break; } return GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query); } static GstFlowReturn gst_d3d11_screen_capture_src_create (GstBaseSrc * bsrc, guint64 offset, guint size, GstBuffer ** buf) { GstD3D11ScreenCaptureSrc *self = GST_D3D11_SCREEN_CAPTURE_SRC (bsrc); ID3D11Texture2D *texture; ID3D11RenderTargetView *rtv = NULL; gint fps_n, fps_d; GstMapInfo info; GstMemory *mem; GstD3D11Memory *dmem; GstFlowReturn ret = GST_FLOW_OK; GstClock *clock = NULL; GstClockTime base_time; GstClockTime next_capture_ts; GstClockTime before_capture; GstClockTime after_capture; GstClockTime latency; GstClockTime dur; gboolean update_latency = FALSE; guint64 next_frame_no; gboolean draw_mouse; /* Just magic number... */ gint unsupported_retry_count = 100; GstBuffer *buffer = NULL; GstBuffer *sysmem_buf = NULL; D3D11_BOX crop_box; if (!self->capture) { GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ, ("Couldn't configure capture object"), (nullptr)); return GST_FLOW_NOT_NEGOTIATED; } fps_n = GST_VIDEO_INFO_FPS_N (&self->video_info); fps_d = GST_VIDEO_INFO_FPS_D (&self->video_info); if (fps_n <= 0 || fps_d <= 0) return GST_FLOW_NOT_NEGOTIATED; crop_box = gst_d3d11_screen_capture_src_get_crop_box (self); if (crop_box.left != self->crop_box.left || crop_box.right != self->crop_box.right || crop_box.top != self->crop_box.top || crop_box.bottom != self->crop_box.bottom) { GST_INFO_OBJECT (self, "Capture area changed, need negotiation"); if (!gst_base_src_negotiate (bsrc)) { GST_ERROR_OBJECT (self, "Failed to negotiate with new capture area"); return GST_FLOW_NOT_NEGOTIATED; } } again: clock = gst_element_get_clock (GST_ELEMENT_CAST (self)); if (!clock) { GST_ELEMENT_ERROR (self, RESOURCE, FAILED, ("Cannot operate without a clock"), (nullptr)); return GST_FLOW_ERROR; } /* Check flushing before waiting clock because we are might be doing * retry */ GST_OBJECT_LOCK (self); if (self->flushing) { ret = GST_FLOW_FLUSHING; GST_OBJECT_UNLOCK (self); goto out; } base_time = GST_ELEMENT_CAST (self)->base_time; next_capture_ts = gst_clock_get_time (clock); next_capture_ts -= base_time; next_frame_no = gst_util_uint64_scale (next_capture_ts, fps_n, GST_SECOND * fps_d); if (next_frame_no == self->last_frame_no) { GstClockID id; GstClockReturn clock_ret; /* Need to wait for the next frame */ next_frame_no += 1; /* Figure out what the next frame time is */ next_capture_ts = gst_util_uint64_scale (next_frame_no, fps_d * GST_SECOND, fps_n); id = gst_clock_new_single_shot_id (GST_ELEMENT_CLOCK (self), next_capture_ts + base_time); self->clock_id = id; /* release the object lock while waiting */ GST_OBJECT_UNLOCK (self); GST_LOG_OBJECT (self, "Waiting for next frame time %" GST_TIME_FORMAT, GST_TIME_ARGS (next_capture_ts)); clock_ret = gst_clock_id_wait (id, NULL); GST_OBJECT_LOCK (self); gst_clock_id_unref (id); self->clock_id = NULL; if (clock_ret == GST_CLOCK_UNSCHEDULED) { /* Got woken up by the unlock function */ ret = GST_FLOW_FLUSHING; GST_OBJECT_UNLOCK (self); goto out; } /* Duration is a complete 1/fps frame duration */ dur = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n); } else { GstClockTime next_frame_ts; GST_LOG_OBJECT (self, "No need to wait for next frame time %" GST_TIME_FORMAT " next frame = %" G_GINT64_FORMAT " prev = %" G_GINT64_FORMAT, GST_TIME_ARGS (next_capture_ts), next_frame_no, self->last_frame_no); next_frame_ts = gst_util_uint64_scale (next_frame_no + 1, fps_d * GST_SECOND, fps_n); /* Frame duration is from now until the next expected capture time */ dur = next_frame_ts - next_capture_ts; } self->last_frame_no = next_frame_no; GST_OBJECT_UNLOCK (self); if (!buffer) { if (self->downstream_supports_d3d11) { ret = GST_BASE_SRC_CLASS (parent_class)->alloc (bsrc, offset, size, &buffer); } else { if (!self->pool) { GST_ERROR_OBJECT (self, "Internal pool wasn't configured"); goto error; } ret = gst_buffer_pool_acquire_buffer (self->pool, &buffer, nullptr); } if (ret != GST_FLOW_OK) goto out; } mem = gst_buffer_peek_memory (buffer, 0); if (!gst_is_d3d11_memory (mem)) { GST_ERROR_OBJECT (self, "Not a D3D11 memory"); goto error; } dmem = (GstD3D11Memory *) mem; draw_mouse = self->show_cursor; rtv = gst_d3d11_memory_get_render_target_view (dmem, 0); if (draw_mouse && !rtv) { GST_ERROR_OBJECT (self, "Render target view is unavailable"); goto error; } if (!gst_memory_map (mem, &info, (GstMapFlags) (GST_MAP_WRITE | GST_MAP_D3D11))) { GST_ERROR_OBJECT (self, "Failed to map d3d11 memory"); goto error; } texture = (ID3D11Texture2D *) info.data; before_capture = gst_clock_get_time (clock); ret = gst_d3d11_screen_capture_do_capture (self->capture, self->device, texture, rtv, self->vs, self->ps, self->layout, self->sampler, self->blend, &self->crop_box, draw_mouse); gst_memory_unmap (mem, &info); switch (ret) { case GST_D3D11_SCREEN_CAPTURE_FLOW_EXPECTED_ERROR: GST_WARNING_OBJECT (self, "Got expected error, try again"); gst_clear_object (&clock); goto again; case GST_D3D11_SCREEN_CAPTURE_FLOW_UNSUPPORTED: GST_WARNING_OBJECT (self, "Got DXGI_ERROR_UNSUPPORTED error"); unsupported_retry_count--; if (unsupported_retry_count < 0) goto error; gst_clear_object (&clock); goto again; case GST_D3D11_SCREEN_CAPTURE_FLOW_SIZE_CHANGED: GST_INFO_OBJECT (self, "Size was changed, need negotiation"); gst_clear_buffer (&buffer); gst_clear_object (&clock); if (!gst_base_src_negotiate (bsrc)) { GST_ERROR_OBJECT (self, "Failed to negotiate with new size"); ret = GST_FLOW_NOT_NEGOTIATED; goto out; } goto again; default: break; } if (ret != GST_FLOW_OK) goto out; if (!self->downstream_supports_d3d11) { ret = GST_BASE_SRC_CLASS (parent_class)->alloc (bsrc, offset, size, &sysmem_buf); if (ret != GST_FLOW_OK) { gst_clear_buffer (&buffer); goto out; } if (!gst_d3d11_buffer_copy_into (sysmem_buf, buffer, &self->video_info)) { GST_ERROR_OBJECT (self, "Failed to copy frame"); goto error; } gst_buffer_unref (buffer); buffer = sysmem_buf; sysmem_buf = nullptr; } GST_BUFFER_DTS (buffer) = GST_CLOCK_TIME_NONE; GST_BUFFER_PTS (buffer) = next_capture_ts; GST_BUFFER_DURATION (buffer) = dur; after_capture = gst_clock_get_time (clock); latency = after_capture - before_capture; if (!GST_CLOCK_TIME_IS_VALID (self->min_latency)) { self->min_latency = self->max_latency = latency; update_latency = TRUE; GST_DEBUG_OBJECT (self, "Initial latency %" GST_TIME_FORMAT, GST_TIME_ARGS (latency)); } if (latency > self->max_latency) { self->max_latency = latency; update_latency = TRUE; GST_DEBUG_OBJECT (self, "Updating max latency %" GST_TIME_FORMAT, GST_TIME_ARGS (latency)); } if (update_latency) { gst_element_post_message (GST_ELEMENT_CAST (self), gst_message_new_latency (GST_OBJECT_CAST (self))); } out: gst_clear_object (&clock); *buf = buffer; return ret; error: gst_clear_buffer (&buffer); gst_clear_buffer (&sysmem_buf); gst_clear_object (&clock); return GST_FLOW_ERROR; }