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gstreamer/subprojects/gst-plugins-bad/sys/d3d12/gstd3d12screencapturesrc.cpp

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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 "gstd3d12plugin-config.h"
#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_static_str
(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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