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gstreamer/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11screencapturesrc.cpp

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/*
* GStreamer
* Copyright (C) 2020 Seungha Yang <seungha@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* 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 <wrl.h>
#include <string.h>
/* *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,
PROP_WINDOW_CAPTURE_MODE,
};
typedef enum
{
GST_D3D11_SCREEN_CAPTURE_API_DXGI,
GST_D3D11_SCREEN_CAPTURE_API_WGC,
} GstD3D11ScreenCaptureAPI;
typedef enum
{
GST_D3D11_WINDOW_CAPTURE_DEFAULT,
GST_D3D11_WINDOW_CAPTURE_CLIENT,
} GstD3D11WindowCaptureMode;
#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;
}
/**
* GstD3D11WindowCaptureMode:
*
* Since: 1.24
*/
#define GST_TYPE_D3D11_WINDOW_CAPTURE_MODE (gst_d3d11_window_capture_mode_get_type())
static GType
gst_d3d11_window_capture_mode_get_type (void)
{
static GType type = 0;
GST_D3D11_CALL_ONCE_BEGIN {
static const GEnumValue hwnd_modes[] = {
/**
* GstD3D11WindowCaptureMode::default:
*
* Since: 1.24
*/
{GST_D3D11_WINDOW_CAPTURE_DEFAULT,
"Capture entire window area", "default"},
/**
* GstD3D11WindowCaptureMode::client:
*
* Since: 1.24
*/
{GST_D3D11_WINDOW_CAPTURE_CLIENT, "Capture client area", "client"},
{0, nullptr, nullptr},
};
type = g_enum_register_static ("GstD3D11WindowCaptureMode", hwnd_modes);
} GST_D3D11_CALL_ONCE_END;
return 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
#define DEFAULT_WINDOW_CAPTURE_MODE GST_D3D11_WINDOW_CAPTURE_DEFAULT
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;
GstD3D11WindowCaptureMode hwnd_capture_mode;
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)));
/**
* GstD3D11ScreenCaptureSrc:window-capture-mode:
*
* Window capture mode to use
*
* Since: 1.24
*/
g_object_class_install_property (gobject_class, PROP_WINDOW_CAPTURE_MODE,
g_param_spec_enum ("window-capture-mode", "Window Capture Mode",
"Window capture mode to use if \"window-handle\" is set",
GST_TYPE_D3D11_WINDOW_CAPTURE_MODE, DEFAULT_WINDOW_CAPTURE_MODE,
(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_WINDOW_CAPTURE_MODE,
(GstPluginAPIFlags) 0);
}
#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 Source", "Source/Video",
"Captures desktop screen", "Seungha Yang <seungha@centricular.com>");
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->hwnd_capture_mode = DEFAULT_WINDOW_CAPTURE_MODE;
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;
case PROP_WINDOW_CAPTURE_MODE:
self->hwnd_capture_mode =
(GstD3D11WindowCaptureMode) g_value_get_enum (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;
case PROP_WINDOW_CAPTURE_MODE:
g_value_set_enum (value, self->hwnd_capture_mode);
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_ONE;
blend_desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
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,
self->hwnd_capture_mode == GST_D3D11_WINDOW_CAPTURE_CLIENT);
} else if (self->capture_api == GST_D3D11_SCREEN_CAPTURE_API_WGC) {
capture = gst_d3d11_winrt_capture_new (self->device,
monitor, nullptr, FALSE);
}
#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, FALSE);
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;
}
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