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gstreamer/subprojects/gst-plugins-bad/sys/d3d11/gstd3d11screencapturesrc.cpp
Seungha Yang 7171849c3e d3d11screencapturesrc: Fix mouse cursor blending 
Ignore alpha component of source (mouse cursor texture)
when blending alpha channel, otherwise the background area of source
(which has zeros) will be written to render target. Then it will result
in black rectangle if output texture is converted to premultiplied alpha
texture

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5577>
2023-10-30 14:03:49 +00:00

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