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gstreamer/subprojects/gst-plugins-bad/sys/d3d12/gstd3d12screencapturesrc.cpp
Seungha Yang 4ac46ce82b d3d12screencapturesrc: Performance improvement 
Process captured frame using d3d11 instead of d3d12, and use shared
fence when copying processed d3d11 texture to d3d12 resource.
In this way, capture CPU thread does not need to wait for fence signal.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6733>
2024-04-25 22:51:01 +00:00

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/* GStreamer
* Copyright (C) 2024 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-d3d12screencapturesrc
* @title: d3d12screencapturesrc
*
* Direct3D12 screen capture element
*
* ## Example launch line
* ```
* gst-launch-1.0 d3d12screencapturesrc ! queue ! d3d12videosink
* ```
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstd3d12screencapturesrc.h"
#include "gstd3d12dxgicapture.h"
#ifdef HAVE_WGC
#include "gstd3d12graphicscapture.h"
#endif
#include "gstd3d12pluginutils.h"
#include <mutex>
#include <wrl.h>
#include <string.h>
/* *INDENT-OFF* */
using namespace Microsoft::WRL;
/* *INDENT-ON* */
GST_DEBUG_CATEGORY (gst_d3d12_screen_capture_debug);
#define GST_CAT_DEFAULT gst_d3d12_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,
};
enum GstD3D12ScreenCaptureAPI
{
GST_D3D12_SCREEN_CAPTURE_API_DXGI,
GST_D3D12_SCREEN_CAPTURE_API_WGC,
};
enum GstD3D12WindowCaptureMode
{
GST_D3D12_WINDOW_CAPTURE_DEFAULT,
GST_D3D12_WINDOW_CAPTURE_CLIENT,
};
#ifdef HAVE_WGC
/**
* GstD3D11ScreenCaptureAPI:
*
* Since: 1.26
*/
#define GST_TYPE_D3D12_SCREEN_CAPTURE_API (gst_d3d12_screen_capture_api_get_type())
static GType
gst_d3d12_screen_capture_api_get_type (void)
{
static GType api_type = 0;
GST_D3D12_CALL_ONCE_BEGIN {
static const GEnumValue api_types[] = {
/**
* GstD3D12ScreenCaptureAPI::dxgi:
*
* Since: 1.26
*/
{GST_D3D12_SCREEN_CAPTURE_API_DXGI, "DXGI Desktop Duplication", "dxgi"},
/**
* GstD3D12ScreenCaptureAPI::wgc:
*
* Since: 1.26
*/
{GST_D3D12_SCREEN_CAPTURE_API_WGC, "Windows Graphics Capture", "wgc"},
{0, nullptr, nullptr},
};
api_type = g_enum_register_static ("GstD3D12ScreenCaptureAPI", api_types);
} GST_D3D12_CALL_ONCE_END;
return api_type;
}
/**
* GstD3D12WindowCaptureMode:
*
* Since: 1.26
*/
#define GST_TYPE_D3D12_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_D3D12_CALL_ONCE_BEGIN {
static const GEnumValue hwnd_modes[] = {
/**
* GstD3D12WindowCaptureMode::default:
*
* Since: 1.26
*/
{GST_D3D12_WINDOW_CAPTURE_DEFAULT,
"Capture entire window area", "default"},
/**
* GstD3D12WindowCaptureMode::client:
*
* Since: 1.26
*/
{GST_D3D12_WINDOW_CAPTURE_CLIENT, "Capture client area", "client"},
{0, nullptr, nullptr},
};
type = g_enum_register_static ("GstD3D12WindowCaptureMode", hwnd_modes);
} GST_D3D12_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_D3D12_SCREEN_CAPTURE_API_DXGI
#define DEFAULT_ADAPTER -1
#define DEFAULT_WINDOW_CAPTURE_MODE GST_D3D12_WINDOW_CAPTURE_DEFAULT
static GstStaticPadTemplate src_template =
GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
(GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY, "BGRA")
", pixel-aspect-ratio = 1/1, colorimetry = (string) sRGB; "
GST_VIDEO_CAPS_MAKE ("BGRA") ", pixel-aspect-ratio = 1/1, "
"colorimetry = (string) sRGB"));
struct GstD3D12ScreenCaptureSrcPrivate
{
~GstD3D12ScreenCaptureSrcPrivate ()
{
if (pool) {
gst_buffer_pool_set_active (pool, FALSE);
gst_clear_object (&pool);
}
gst_clear_object (&capture);
}
guint64 last_frame_no = 0;
GstClockID clock_id = nullptr;
GstVideoInfo video_info;
GstD3D12ScreenCapture *capture = nullptr;
GstBufferPool *pool = nullptr;
gint64 adapter_luid = 0;
gint adapter_index = DEFAULT_ADAPTER;
gint monitor_index = DEFAULT_MONITOR_INDEX;
HMONITOR monitor_handle = nullptr;
HWND window_handle = nullptr;
gboolean show_cursor = DEFAULT_SHOW_CURSOR;
gboolean show_border = DEFAULT_SHOW_BORDER;
CaptureCropRect crop_rect = { };
D3D12_BOX crop_box = { };
GstD3D12ScreenCaptureAPI capture_api = DEFAULT_CAPTURE_API;
GstD3D12ScreenCaptureAPI selected_capture_api = DEFAULT_CAPTURE_API;
GstD3D12WindowCaptureMode hwnd_capture_mode = DEFAULT_WINDOW_CAPTURE_MODE;
gboolean flushing = FALSE;
GstClockTime latency = GST_CLOCK_TIME_NONE;
gboolean downstream_supports_d3d12 = FALSE;
std::recursive_mutex lock;
std::mutex flush_lock;
};
struct _GstD3D12ScreenCaptureSrc
{
GstBaseSrc src;
GstD3D12Device *device;
GstD3D12ScreenCaptureSrcPrivate *priv;
};
static void gst_d3d12_screen_capture_src_finalize (GObject * object);
static void gst_d3d12_screen_capture_src_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_d3d12_screen_capture_src_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstClock *gst_d3d12_screen_capture_src_provide_clock (GstElement *
element);
static void gst_d3d12_screen_capture_src_set_context (GstElement * element,
GstContext * context);
static GstCaps *gst_d3d12_screen_capture_src_get_caps (GstBaseSrc * bsrc,
GstCaps * filter);
static GstCaps *gst_d3d12_screen_capture_src_fixate (GstBaseSrc * bsrc,
GstCaps * caps);
static gboolean gst_d3d12_screen_capture_src_set_caps (GstBaseSrc * bsrc,
GstCaps * caps);
static gboolean gst_d3d12_screen_capture_src_decide_allocation (GstBaseSrc *
bsrc, GstQuery * query);
static gboolean gst_d3d12_screen_capture_src_start (GstBaseSrc * bsrc);
static gboolean gst_d3d12_screen_capture_src_stop (GstBaseSrc * bsrc);
static gboolean gst_d3d12_screen_capture_src_unlock (GstBaseSrc * bsrc);
static gboolean gst_d3d12_screen_capture_src_unlock_stop (GstBaseSrc * bsrc);
static gboolean
gst_d3d12_screen_capture_src_src_query (GstBaseSrc * bsrc, GstQuery * query);
static GstFlowReturn gst_d3d12_screen_capture_src_create (GstBaseSrc * bsrc,
guint64 offset, guint size, GstBuffer ** buf);
#define gst_d3d12_screen_capture_src_parent_class parent_class
G_DEFINE_TYPE (GstD3D12ScreenCaptureSrc, gst_d3d12_screen_capture_src,
GST_TYPE_BASE_SRC);
static void
gst_d3d12_screen_capture_src_class_init (GstD3D12ScreenCaptureSrcClass * klass)
{
auto object_class = G_OBJECT_CLASS (klass);
auto element_class = GST_ELEMENT_CLASS (klass);
auto basesrc_class = GST_BASE_SRC_CLASS (klass);
object_class->finalize = gst_d3d12_screen_capture_src_finalize;
object_class->set_property = gst_d3d12_screen_capture_src_set_property;
object_class->get_property = gst_d3d12_screen_capture_src_get_property;
g_object_class_install_property (object_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 (object_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 (object_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)));
g_object_class_install_property (object_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)));
g_object_class_install_property (object_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)));
g_object_class_install_property (object_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)));
g_object_class_install_property (object_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_WGC
if (gst_d3d12_graphics_capture_load_library ()) {
/**
* GstD3D12ScreenCaptureSrc:window-handle:
*
* HWND window handle to capture
*
* Since: 1.26
*/
g_object_class_install_property (object_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)));
/**
* GstD3D12ScreenCaptureSrc:show-border:
*
* Show border lines to capture area when WGC mode is selected.
* This feature requires Windows11 or newer
*
* Since: 1.26
*/
g_object_class_install_property (object_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)));
/**
* GstD3D12ScreenCaptureSrc:capture-api:
*
* Capture API to use
*
* Since: 1.26
*/
g_object_class_install_property (object_class, PROP_CAPTURE_API,
g_param_spec_enum ("capture-api", "Capture API", "Capture API to use",
GST_TYPE_D3D12_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_D3D12_SCREEN_CAPTURE_API,
(GstPluginAPIFlags) 0);
/**
* GstD3D12ScreenCaptureSrc:adapter:
*
* DXGI Adapter index for creating device when WGC mode is selected
*
* Since: 1.26
*/
g_object_class_install_property (object_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)));
/**
* GstD3D12ScreenCaptureSrc:window-capture-mode:
*
* Window capture mode to use
*
* Since: 1.26
*/
g_object_class_install_property (object_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_D3D12_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_D3D12_WINDOW_CAPTURE_MODE,
(GstPluginAPIFlags) 0);
}
#endif
element_class->provide_clock =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_provide_clock);
element_class->set_context =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_set_context);
gst_element_class_set_static_metadata (element_class,
"Direct3D12 Screen Capture Source", "Source/Video",
"Captures desktop screen", "Seungha Yang <seungha@centricular.com>");
gst_element_class_add_static_pad_template (element_class, &src_template);
basesrc_class->get_caps =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_get_caps);
basesrc_class->fixate =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_fixate);
basesrc_class->set_caps =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_set_caps);
basesrc_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_decide_allocation);
basesrc_class->start = GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_start);
basesrc_class->stop = GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_stop);
basesrc_class->unlock =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_unlock);
basesrc_class->unlock_stop =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_unlock_stop);
basesrc_class->query =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_src_query);
basesrc_class->create =
GST_DEBUG_FUNCPTR (gst_d3d12_screen_capture_src_create);
GST_DEBUG_CATEGORY_INIT (gst_d3d12_screen_capture_debug,
"d3d12screencapturesrc", 0, "d3d12screencapturesrc");
}
static void
gst_d3d12_screen_capture_src_init (GstD3D12ScreenCaptureSrc * self)
{
gst_base_src_set_live (GST_BASE_SRC (self), TRUE);
gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME);
self->priv = new GstD3D12ScreenCaptureSrcPrivate ();
GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_PROVIDE_CLOCK);
GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_REQUIRE_CLOCK);
}
static void
gst_d3d12_screen_capture_src_finalize (GObject * object)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (object);
delete self->priv;
gst_clear_object (&self->device);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_d3d12_screen_capture_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (object);
auto priv = self->priv;
std::lock_guard < std::recursive_mutex > lk (priv->lock);
switch (prop_id) {
case PROP_MONITOR_INDEX:
priv->monitor_index = g_value_get_int (value);
break;
case PROP_MONITOR_HANDLE:
priv->monitor_handle = (HMONITOR) g_value_get_uint64 (value);
break;
case PROP_SHOW_CURSOR:
priv->show_cursor = g_value_get_boolean (value);
break;
case PROP_CROP_X:
priv->crop_rect.crop_x = g_value_get_uint (value);
break;
case PROP_CROP_Y:
priv->crop_rect.crop_y = g_value_get_uint (value);
break;
case PROP_CROP_WIDTH:
priv->crop_rect.crop_w = g_value_get_uint (value);
break;
case PROP_CROP_HEIGHT:
priv->crop_rect.crop_h = g_value_get_uint (value);
break;
case PROP_WINDOW_HANDLE:
priv->window_handle = (HWND) g_value_get_uint64 (value);
break;
case PROP_SHOW_BORDER:
priv->show_border = g_value_get_boolean (value);
#ifdef HAVE_WGC
if (priv->capture &&
priv->capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC) {
auto wgc = GST_D3D12_GRAPHICS_CAPTURE (priv->capture);
gst_d3d12_graphics_capture_show_border (wgc, priv->show_border);
}
#endif
break;
case PROP_CAPTURE_API:
priv->capture_api = (GstD3D12ScreenCaptureAPI) g_value_get_enum (value);
break;
case PROP_ADAPTER:
priv->adapter_index = g_value_get_int (value);
break;
case PROP_WINDOW_CAPTURE_MODE:
priv->hwnd_capture_mode =
(GstD3D12WindowCaptureMode) g_value_get_enum (value);
#ifdef HAVE_WGC
if (priv->capture &&
priv->capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC) {
auto wgc = GST_D3D12_GRAPHICS_CAPTURE (priv->capture);
gst_d3d12_graphics_capture_set_client_only (wgc,
priv->hwnd_capture_mode == GST_D3D12_WINDOW_CAPTURE_CLIENT);
}
#endif
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
};
}
static void
gst_d3d12_screen_capture_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (object);
auto priv = self->priv;
std::lock_guard < std::recursive_mutex > lk (priv->lock);
switch (prop_id) {
case PROP_MONITOR_INDEX:
g_value_set_int (value, priv->monitor_index);
break;
case PROP_MONITOR_HANDLE:
g_value_set_uint64 (value, (guint64) priv->monitor_handle);
break;
case PROP_SHOW_CURSOR:
g_value_set_boolean (value, priv->show_cursor);
break;
case PROP_CROP_X:
g_value_set_uint (value, priv->crop_rect.crop_x);
break;
case PROP_CROP_Y:
g_value_set_uint (value, priv->crop_rect.crop_y);
break;
case PROP_CROP_WIDTH:
g_value_set_uint (value, priv->crop_rect.crop_w);
break;
case PROP_CROP_HEIGHT:
g_value_set_uint (value, priv->crop_rect.crop_h);
break;
case PROP_WINDOW_HANDLE:
g_value_set_uint64 (value, (guint64) priv->window_handle);
break;
case PROP_SHOW_BORDER:
g_value_set_boolean (value, priv->show_border);
break;
case PROP_CAPTURE_API:
g_value_set_enum (value, priv->capture_api);
break;
case PROP_ADAPTER:
g_value_set_int (value, priv->adapter_index);
break;
case PROP_WINDOW_CAPTURE_MODE:
g_value_set_enum (value, priv->hwnd_capture_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
};
}
static GstClock *
gst_d3d12_screen_capture_src_provide_clock (GstElement * element)
{
return gst_system_clock_obtain ();
}
static void
gst_d3d12_screen_capture_src_set_context (GstElement * element,
GstContext * context)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (element);
auto priv = self->priv;
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
gst_d3d12_handle_set_context_for_adapter_luid (element,
context, priv->adapter_luid, &self->device);
}
GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}
static void
gst_d3d12_screen_capture_src_get_crop_box (GstD3D12ScreenCaptureSrc * self,
D3D12_BOX & box)
{
auto priv = self->priv;
guint screen_width, screen_height;
box.front = 0;
box.back = 1;
gst_d3d12_screen_capture_get_size (priv->capture, &screen_width,
&screen_height);
if ((priv->crop_rect.crop_x + priv->crop_rect.crop_w) > screen_width ||
(priv->crop_rect.crop_y + priv->crop_rect.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 = priv->crop_rect.crop_x;
box.top = priv->crop_rect.crop_y;
box.right = priv->crop_rect.crop_w ?
(priv->crop_rect.crop_x + priv->crop_rect.crop_w) : screen_width;
box.bottom = priv->crop_rect.crop_h ?
(priv->crop_rect.crop_y + priv->crop_rect.crop_h) : screen_height;
}
}
static GstCaps *
gst_d3d12_screen_capture_src_get_caps (GstBaseSrc * bsrc, GstCaps * filter)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
guint width, height;
std::lock_guard < std::recursive_mutex > lk (priv->lock);
if (!priv->capture) {
GST_DEBUG_OBJECT (self, "capture object is not configured yet");
return gst_pad_get_pad_template_caps (GST_BASE_SRC_PAD (bsrc));
}
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC) {
gst_d3d12_screen_capture_get_size (priv->capture, &width, &height);
} else {
gst_d3d12_screen_capture_src_get_crop_box (self, priv->crop_box);
width = priv->crop_box.right - priv->crop_box.left;
height = priv->crop_box.bottom - priv->crop_box.top;
}
auto 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 (filter) {
auto tmp = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (caps);
caps = tmp;
}
return caps;
}
static GstCaps *
gst_d3d12_screen_capture_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
{
GstCaps *d3d12_caps = nullptr;
caps = gst_caps_make_writable (caps);
auto size = gst_caps_get_size (caps);
for (guint i = 0; i < size; i++) {
auto s = gst_caps_get_structure (caps, i);
gst_structure_fixate_field_nearest_fraction (s, "framerate", 30, 1);
if (!d3d12_caps) {
auto features = gst_caps_get_features (caps, i);
if (gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY)) {
d3d12_caps = gst_caps_new_empty ();
gst_caps_append_structure (d3d12_caps, gst_structure_copy (s));
gst_caps_set_features (d3d12_caps, 0,
gst_caps_features_new (GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY,
nullptr));
break;
}
}
}
if (d3d12_caps) {
gst_caps_unref (caps);
caps = d3d12_caps;
}
return gst_caps_fixate (caps);
}
static gboolean
gst_d3d12_screen_capture_src_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
GST_DEBUG_OBJECT (self, "Set caps %" GST_PTR_FORMAT, caps);
auto features = gst_caps_get_features (caps, 0);
if (gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY)) {
priv->downstream_supports_d3d12 = TRUE;
} else {
priv->downstream_supports_d3d12 = FALSE;
}
gst_video_info_from_caps (&priv->video_info, caps);
gst_base_src_set_blocksize (bsrc, GST_VIDEO_INFO_SIZE (&priv->video_info));
return TRUE;
}
static gboolean
gst_d3d12_screen_capture_src_decide_allocation (GstBaseSrc * bsrc,
GstQuery * query)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
GstBufferPool *pool = nullptr;
GstStructure *config;
GstCaps *caps;
guint min, max, size;
gboolean update_pool;
GstVideoInfo vinfo;
if (priv->pool) {
gst_buffer_pool_set_active (priv->pool, FALSE);
gst_clear_object (&priv->pool);
}
gst_query_parse_allocation (query, &caps, nullptr);
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 && priv->downstream_supports_d3d12) {
if (!GST_IS_D3D12_BUFFER_POOL (pool)) {
gst_clear_object (&pool);
} else {
auto dpool = GST_D3D12_BUFFER_POOL (pool);
if (!gst_d3d12_device_is_equal (dpool->device, self->device))
gst_clear_object (&pool);
}
}
if (!pool) {
if (priv->downstream_supports_d3d12)
pool = gst_d3d12_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 (priv->downstream_supports_d3d12) {
D3D12_RESOURCE_FLAGS resource_flags =
D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS |
D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET;
auto params = gst_buffer_pool_config_get_d3d12_allocation_params (config);
if (!params) {
params = gst_d3d12_allocation_params_new (self->device, &vinfo,
GST_D3D12_ALLOCATION_FLAG_DEFAULT, resource_flags,
D3D12_HEAP_FLAG_SHARED);
} else {
gst_d3d12_allocation_params_set_resource_flags (params, resource_flags);
gst_d3d12_allocation_params_unset_resource_flags (params,
D3D12_RESOURCE_FLAG_DENY_SHADER_RESOURCE);
gst_d3d12_allocation_params_set_heap_flags (params,
D3D12_HEAP_FLAG_SHARED);
}
gst_buffer_pool_config_set_d3d12_allocation_params (config, params);
gst_d3d12_allocation_params_free (params);
}
if (!gst_buffer_pool_set_config (pool, config)) {
GST_ERROR_OBJECT (self, "Failed to set config");
gst_clear_object (&pool);
return FALSE;
}
/* d3d12 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 (!priv->downstream_supports_d3d12) {
priv->pool = gst_d3d12_buffer_pool_new (self->device);
config = gst_buffer_pool_get_config (priv->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);
D3D12_RESOURCE_FLAGS resource_flags =
D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS |
D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET;
auto params = gst_d3d12_allocation_params_new (self->device, &vinfo,
GST_D3D12_ALLOCATION_FLAG_DEFAULT, resource_flags,
D3D12_HEAP_FLAG_SHARED);
gst_buffer_pool_config_set_d3d12_allocation_params (config, params);
gst_d3d12_allocation_params_free (params);
if (!gst_buffer_pool_set_config (priv->pool, config)) {
GST_ERROR_OBJECT (self, "Failed to set config for internal pool");
gst_clear_object (&priv->pool);
gst_clear_object (&pool);
return FALSE;
}
if (!gst_buffer_pool_set_active (priv->pool, TRUE)) {
GST_ERROR_OBJECT (self, "Failed to activate internal pool");
gst_clear_object (&pool);
return FALSE;
}
}
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;
}
static gboolean
gst_d3d12_screen_capture_src_start (GstBaseSrc * bsrc)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
GstFlowReturn ret;
HMONITOR monitor = priv->monitor_handle;
ComPtr < IDXGIAdapter1 > adapter;
GstD3D12ScreenCapture *capture = nullptr;
HRESULT hr;
GstD3D12ScreenCaptureAPI requested_api;
std::unique_lock < std::recursive_mutex > lk (priv->lock);
requested_api = priv->capture_api;
if (priv->window_handle) {
priv->selected_capture_api = GST_D3D12_SCREEN_CAPTURE_API_WGC;
} else {
priv->selected_capture_api = requested_api;
if (monitor) {
hr = gst_d3d12_screen_capture_find_output_for_monitor (monitor,
&adapter, nullptr);
} else if (priv->monitor_index < 0) {
hr = gst_d3d12_screen_capture_find_primary_monitor (&monitor,
&adapter, nullptr);
} else {
hr = gst_d3d12_screen_capture_find_nth_monitor (priv->monitor_index,
&monitor, &adapter, nullptr);
}
if (FAILED (hr)) {
GST_ERROR_OBJECT (self, "Couldn't get monitor handle");
goto error;
}
}
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_DXGI) {
DXGI_ADAPTER_DESC desc;
adapter->GetDesc (&desc);
priv->adapter_luid = gst_d3d12_luid_to_int64 (&desc.AdapterLuid);
gst_clear_object (&self->device);
gst_d3d12_ensure_element_data_for_adapter_luid (GST_ELEMENT_CAST (self),
priv->adapter_luid, &self->device);
} else {
gst_clear_object (&self->device);
gst_d3d12_ensure_element_data (GST_ELEMENT_CAST (self),
priv->adapter_index, &self->device);
}
if (!self->device) {
lk.unlock ();
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("D3D12 device is not available"), (nullptr));
return FALSE;
}
#ifdef HAVE_WGC
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC) {
capture = gst_d3d12_graphics_capture_new (self->device,
priv->window_handle, monitor);
} else
#endif
{
capture = gst_d3d12_dxgi_capture_new (self->device, monitor);
}
if (!capture) {
GST_ERROR_OBJECT (self, "Couldn't create capture object");
goto error;
}
/* Check if we can open device */
ret = gst_d3d12_screen_capture_prepare (capture);
switch (ret) {
case GST_D3D12_SCREEN_CAPTURE_FLOW_EXPECTED_ERROR:
case GST_FLOW_OK:
break;
case GST_D3D12_SCREEN_CAPTURE_FLOW_UNSUPPORTED:
#ifdef HAVE_WGC
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_DXGI) {
gst_clear_object (&capture);
GST_WARNING_OBJECT (self, "DXGI capture is not available");
capture = gst_d3d12_graphics_capture_new (self->device,
nullptr, monitor);
if (capture) {
priv->selected_capture_api = GST_D3D12_SCREEN_CAPTURE_API_WGC;
GST_INFO_OBJECT (self, "Fallback to Windows Graphics Capture");
break;
}
}
#endif
goto unsupported;
default:
goto error;
}
priv->last_frame_no = -1;
priv->latency = GST_CLOCK_TIME_NONE;
priv->capture = capture;
#ifdef HAVE_WGC
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC) {
auto wgc = GST_D3D12_GRAPHICS_CAPTURE (priv->capture);
gst_d3d12_graphics_capture_show_cursor (wgc, priv->show_cursor);
gst_d3d12_graphics_capture_show_border (wgc, priv->show_border);
gst_d3d12_graphics_capture_set_client_only (wgc,
priv->hwnd_capture_mode == GST_D3D12_WINDOW_CAPTURE_CLIENT);
}
#endif
if (priv->capture_api != priv->selected_capture_api) {
priv->capture_api = priv->selected_capture_api;
lk.unlock ();
g_object_notify (G_OBJECT (self), "capture-api");
}
return TRUE;
error:
{
gst_clear_object (&capture);
lk.unlock ();
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("Failed to prepare capture object with given configuration, "
"monitor-index: %d, monitor-handle: %p",
priv->monitor_index, priv->monitor_handle), (nullptr));
return FALSE;
}
unsupported:
{
gst_clear_object (&capture);
lk.unlock ();
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ,
("Failed to prepare capture object with given configuration, "
"monitor-index: %d, monitor-handle: %p",
priv->monitor_index, priv->monitor_handle),
("Try run the application on the integrated GPU"));
return FALSE;
}
}
static gboolean
gst_d3d12_screen_capture_src_stop (GstBaseSrc * bsrc)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
if (priv->pool) {
gst_buffer_pool_set_active (priv->pool, FALSE);
gst_clear_object (&priv->pool);
}
std::lock_guard < std::recursive_mutex > lk (priv->lock);
gst_clear_object (&priv->capture);
gst_clear_object (&self->device);
return TRUE;
}
static gboolean
gst_d3d12_screen_capture_src_unlock (GstBaseSrc * bsrc)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->flush_lock);
if (priv->capture)
gst_d3d12_screen_capture_unlock (priv->capture);
if (priv->clock_id) {
GST_DEBUG_OBJECT (self, "Waking up waiting clock");
gst_clock_id_unschedule (priv->clock_id);
}
priv->flushing = TRUE;
return TRUE;
}
static gboolean
gst_d3d12_screen_capture_src_unlock_stop (GstBaseSrc * bsrc)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->flush_lock);
if (priv->capture)
gst_d3d12_screen_capture_unlock_stop (priv->capture);
priv->flushing = FALSE;
return TRUE;
}
static gboolean
gst_d3d12_screen_capture_src_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
if (gst_d3d12_handle_context_query (GST_ELEMENT_CAST (self), query,
self->device)) {
return TRUE;
}
break;
}
case GST_QUERY_LATENCY:
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
if (GST_CLOCK_TIME_IS_VALID (priv->latency)) {
gst_query_set_latency (query, TRUE, priv->latency, GST_CLOCK_TIME_NONE);
return TRUE;
}
break;
}
default:
break;
}
return GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
}
#ifdef HAVE_WGC
static GstFlowReturn
gst_d3d12_screen_capture_src_wgc_capture (GstBaseSrc * bsrc,
guint64 offset, guint size, GstBuffer ** buf)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
GstClockTime base_time;
GstClockTime next_capture_ts;
GstClockTime dur;
guint64 next_frame_no;
auto fps_n = GST_VIDEO_INFO_FPS_N (&priv->video_info);
auto fps_d = GST_VIDEO_INFO_FPS_D (&priv->video_info);
if (fps_n <= 0 || fps_d <= 0)
return GST_FLOW_NOT_NEGOTIATED;
auto clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
{
std::unique_lock < std::mutex > lk (priv->flush_lock);
if (priv->flushing) {
gst_clear_object (&clock);
return GST_FLOW_FLUSHING;
}
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 == priv->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);
priv->clock_id = id;
/* release the object lock while waiting */
lk.unlock ();
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, nullptr);
lk.lock ();
gst_clock_id_unref (id);
priv->clock_id = nullptr;
if (clock_ret == GST_CLOCK_UNSCHEDULED) {
/* Got woken up by the unlock function */
gst_clear_object (&clock);
return GST_FLOW_FLUSHING;
}
/* 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,
priv->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;
}
}
gst_clear_object (&clock);
priv->last_frame_no = next_frame_no;
auto wgc = GST_D3D12_GRAPHICS_CAPTURE (priv->capture);
GstBuffer *buffer = nullptr;
guint width, height;
CaptureCropRect crop_rect;
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
crop_rect = priv->crop_rect;
}
auto ret = gst_d3d12_graphics_capture_do_capture (wgc,
priv->downstream_supports_d3d12, &crop_rect, &buffer, &width, &height);
if (ret != GST_FLOW_OK)
return ret;
if (width != priv->video_info.width || height != priv->video_info.height) {
gst_video_info_set_format (&priv->video_info, GST_VIDEO_FORMAT_BGRA,
width, height);
priv->video_info.fps_n = fps_n;
priv->video_info.fps_d = fps_d;
auto caps = gst_pad_get_current_caps (bsrc->srcpad);
if (!caps || gst_caps_is_any (caps)) {
GST_ERROR_OBJECT (self, "Couldn't get current caps");
gst_clear_caps (&caps);
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
caps = gst_caps_make_writable (caps);
gst_caps_set_simple (caps, "width", G_TYPE_INT, width, "height", G_TYPE_INT,
height, nullptr);
auto caps_ret = gst_base_src_set_caps (bsrc, caps);
gst_caps_unref (caps);
if (!caps_ret) {
GST_ERROR_OBJECT (self, "Couldn't update caps");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
}
GST_BUFFER_DTS (buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_PTS (buffer) = next_capture_ts;
GST_BUFFER_DURATION (buffer) = dur;
*buf = buffer;
return GST_FLOW_OK;
}
#endif
static GstFlowReturn
gst_d3d12_screen_capture_src_dxgi_capture (GstBaseSrc * bsrc,
guint64 offset, guint size, GstBuffer ** buf)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
gint fps_n, fps_d;
GstFlowReturn ret = GST_FLOW_OK;
GstClockTime base_time;
GstClockTime next_capture_ts;
GstClockTime latency;
GstClockTime dur;
guint64 next_frame_no;
gboolean draw_mouse;
/* Just magic number... */
gint unsupported_retry_count = 100;
GstBuffer *buffer = nullptr;
D3D12_BOX crop_box;
auto dxgi_capture = GST_D3D12_DXGI_CAPTURE (priv->capture);
fps_n = GST_VIDEO_INFO_FPS_N (&priv->video_info);
fps_d = GST_VIDEO_INFO_FPS_D (&priv->video_info);
if (fps_n <= 0 || fps_d <= 0)
return GST_FLOW_NOT_NEGOTIATED;
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
draw_mouse = priv->show_cursor;
gst_d3d12_screen_capture_src_get_crop_box (self, crop_box);
if (crop_box.left != priv->crop_box.left ||
crop_box.right != priv->crop_box.right ||
crop_box.top != priv->crop_box.top ||
crop_box.bottom != priv->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:
auto clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
/* Check flushing before waiting clock because we are might be doing
* retry */
{
std::unique_lock < std::mutex > lk (priv->flush_lock);
if (priv->flushing) {
gst_clear_object (&clock);
return GST_FLOW_FLUSHING;
}
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 == priv->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);
priv->clock_id = id;
/* release the object lock while waiting */
lk.unlock ();
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, nullptr);
lk.lock ();
gst_clock_id_unref (id);
priv->clock_id = nullptr;
if (clock_ret == GST_CLOCK_UNSCHEDULED) {
/* Got woken up by the unlock function */
gst_clear_object (&clock);
return GST_FLOW_FLUSHING;
}
/* 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,
priv->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;
}
}
gst_clear_object (&clock);
priv->last_frame_no = next_frame_no;
if (!buffer) {
if (priv->downstream_supports_d3d12) {
ret = GST_BASE_SRC_CLASS (parent_class)->alloc (bsrc,
offset, size, &buffer);
} else {
ret = gst_buffer_pool_acquire_buffer (priv->pool, &buffer, nullptr);
}
if (ret != GST_FLOW_OK)
return ret;
}
auto before_capture = gst_util_get_timestamp ();
ret = gst_d3d12_dxgi_capture_do_capture (dxgi_capture, buffer,
&crop_box, draw_mouse);
switch (ret) {
case GST_D3D12_SCREEN_CAPTURE_FLOW_EXPECTED_ERROR:
GST_WARNING_OBJECT (self, "Got expected error, try again");
goto again;
case GST_D3D12_SCREEN_CAPTURE_FLOW_UNSUPPORTED:
GST_WARNING_OBJECT (self, "Got DXGI_ERROR_UNSUPPORTED error");
unsupported_retry_count--;
if (unsupported_retry_count < 0) {
gst_clear_buffer (&buffer);
GST_ERROR_OBJECT (self, "too many DXGI_ERROR_UNSUPPORTED");
return GST_FLOW_ERROR;
}
goto again;
case GST_D3D12_SCREEN_CAPTURE_FLOW_SIZE_CHANGED:
GST_INFO_OBJECT (self, "Size was changed, need negotiation");
gst_clear_buffer (&buffer);
if (!gst_base_src_negotiate (bsrc)) {
GST_ERROR_OBJECT (self, "Failed to negotiate with new size");
return GST_FLOW_NOT_NEGOTIATED;
}
goto again;
default:
break;
}
if (ret != GST_FLOW_OK) {
gst_clear_buffer (&buffer);
return ret;
}
if (!priv->downstream_supports_d3d12) {
GstVideoFrame in_frame, out_frame;
GstBuffer *sysmem_buf = nullptr;
ret = GST_BASE_SRC_CLASS (parent_class)->alloc (bsrc,
offset, size, &sysmem_buf);
if (ret != GST_FLOW_OK) {
gst_clear_buffer (&buffer);
return ret;
}
if (!gst_video_frame_map (&in_frame, &priv->video_info, buffer,
GST_MAP_READ)) {
GST_ERROR_OBJECT (self, "Couldn't map frame");
gst_clear_buffer (&buffer);
gst_clear_buffer (&sysmem_buf);
return GST_FLOW_ERROR;
}
if (!gst_video_frame_map (&out_frame, &priv->video_info, sysmem_buf,
GST_MAP_WRITE)) {
GST_ERROR_OBJECT (self, "Couldn't map frame");
gst_video_frame_unmap (&in_frame);
gst_clear_buffer (&buffer);
gst_clear_buffer (&sysmem_buf);
return GST_FLOW_ERROR;
}
auto copy_ret = gst_video_frame_copy (&out_frame, &in_frame);
gst_video_frame_unmap (&out_frame);
gst_video_frame_unmap (&in_frame);
if (!copy_ret) {
GST_ERROR_OBJECT (self, "Couldn't copy frame");
gst_clear_buffer (&buffer);
gst_clear_buffer (&sysmem_buf);
return GST_FLOW_ERROR;
}
gst_buffer_unref (buffer);
buffer = sysmem_buf;
}
GST_BUFFER_DTS (buffer) = GST_CLOCK_TIME_NONE;
GST_BUFFER_PTS (buffer) = next_capture_ts;
GST_BUFFER_DURATION (buffer) = dur;
auto after_capture = gst_util_get_timestamp ();
latency = after_capture - before_capture;
{
std::lock_guard < std::recursive_mutex > lk (priv->lock);
if (!GST_CLOCK_TIME_IS_VALID (priv->latency) || priv->latency < latency) {
priv->latency = latency;
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_message_new_latency (GST_OBJECT_CAST (self)));
}
}
*buf = buffer;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_d3d12_screen_capture_src_create (GstBaseSrc * bsrc, guint64 offset,
guint size, GstBuffer ** buf)
{
auto self = GST_D3D12_SCREEN_CAPTURE_SRC (bsrc);
auto priv = self->priv;
if (!priv->capture) {
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ,
("Couldn't configure capture object"), (nullptr));
return GST_FLOW_NOT_NEGOTIATED;
}
#ifdef HAVE_WGC
if (priv->selected_capture_api == GST_D3D12_SCREEN_CAPTURE_API_WGC)
return gst_d3d12_screen_capture_src_wgc_capture (bsrc, offset, size, buf);
#endif
return gst_d3d12_screen_capture_src_dxgi_capture (bsrc, offset, size, buf);
}
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