gstreamer/subprojects/gst-plugins-bad/sys/webview2/gstwebview2src.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-webview2src
* @title: webview2src
* @short_description: WebView2 based browser source
*
* Since: 1.26
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstwebview2src.h"
#include "gstwebview2object.h"
#include <gst/d3d11/gstd3d11-private.h>
#include <gst/d3d12/gstd3d12.h>
#include <mutex>
#include <string>
#include <wrl.h>
/* *INDENT-OFF* */
using namespace Microsoft::WRL;
/* *INDENT-ON* */
GST_DEBUG_CATEGORY (gst_webview2_src_debug);
#define GST_CAT_DEFAULT gst_webview2_src_debug
static GstStaticPadTemplate pad_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_D3D11_MEMORY,
"BGRA") ", pixel-aspect-ratio = 1/1; "
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY,
"BGRA") ", pixel-aspect-ratio = 1/1; "
GST_VIDEO_CAPS_MAKE ("BGRA") ", pixel-aspect-ratio = 1/1"));
enum
{
PROP_0,
PROP_ADAPTER,
PROP_LOCATION,
PROP_PROCESSING_DEADLINE,
PROP_JAVASCRIPT,
PROP_USER_DATA_FOLDER,
};
#define DEFAULT_LOCATION "about:blank"
#define DEFAULT_PROCESSING_DEADLINE (20 * GST_MSECOND)
#define DEFAULT_ADAPTER -1
/* *INDENT-OFF* */
struct GstWebView2SrcPrivate
{
~GstWebView2SrcPrivate ()
{
ClearResource ();
gst_clear_object (&object);
gst_clear_object (&device12);
gst_clear_object (&device);
}
void ClearResource ()
{
if (fence12) {
auto completed = fence12->GetCompletedValue ();
if (completed < fence_val)
fence12->SetEventOnCompletion (fence_val, nullptr);
}
staging = nullptr;
fence12 = nullptr;
fence11 = nullptr;
fence_val = 0;
context4 = nullptr;
device_5 = nullptr;
can_d3d12_copy = FALSE;
}
GstD3D11Device *device = nullptr;
GstD3D12Device *device12 = nullptr;
GstWebView2Object *object = nullptr;
std::mutex lock;
GstVideoInfo info;
guint64 last_frame_no;
GstClockID clock_id = nullptr;
ComPtr<ID3D11Texture2D> staging;
/* D3D12 interop */
ComPtr<ID3D11Device5> device_5;
ComPtr<ID3D11DeviceContext4> context4;
ComPtr<ID3D11Fence> fence11;
ComPtr<ID3D12Fence> fence12;
gboolean can_d3d12_copy;
UINT64 fence_val = 0;
/* properties */
gint adapter_index = DEFAULT_ADAPTER;
std::string location = DEFAULT_LOCATION;
GstClockTime processing_deadline = DEFAULT_PROCESSING_DEADLINE;
std::string script;
std::string user_data_folder;
};
/* *INDENT-ON* */
struct _GstWebView2Src
{
GstBaseSrc parent;
GstWebView2SrcPrivate *priv;
};
static void gst_webview2_src_finalize (GObject * object);
static void gst_webview2_src_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_win32_video_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstClock *gst_webview2_src_provide_clock (GstElement * elem);
static void gst_webview2_src_set_context (GstElement * elem,
GstContext * context);
static gboolean gst_webview2_src_start (GstBaseSrc * src);
static gboolean gst_webview2_src_stop (GstBaseSrc * src);
static gboolean gst_webview2_src_unlock (GstBaseSrc * src);
static gboolean gst_webview2_src_unlock_stop (GstBaseSrc * src);
static gboolean gst_webview2_src_query (GstBaseSrc * src, GstQuery * query);
static GstCaps *gst_webview2_src_fixate (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_webview2_src_set_caps (GstBaseSrc * src, GstCaps * caps);
static gboolean gst_webview2_decide_allocation (GstBaseSrc * src,
GstQuery * query);
static gboolean gst_webview2_src_event (GstBaseSrc * src, GstEvent * event);
static GstFlowReturn gst_webview2_src_create (GstBaseSrc * src,
guint64 offset, guint size, GstBuffer ** buf);
static void gst_webview2_src_uri_handler_init (gpointer iface, gpointer data);
#define gst_webview2_src_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWebView2Src, gst_webview2_src, GST_TYPE_BASE_SRC,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
gst_webview2_src_uri_handler_init));
static void
gst_webview2_src_class_init (GstWebView2SrcClass * klass)
{
auto object_class = G_OBJECT_CLASS (klass);
auto element_class = GST_ELEMENT_CLASS (klass);
auto src_class = GST_BASE_SRC_CLASS (klass);
object_class->finalize = gst_webview2_src_finalize;
object_class->set_property = gst_webview2_src_set_property;
object_class->get_property = gst_win32_video_src_get_property;
g_object_class_install_property (object_class, PROP_ADAPTER,
g_param_spec_int ("adapter", "Adapter",
"DXGI Adapter index (-1 for any device)",
-1, G_MAXINT32, DEFAULT_ADAPTER,
(GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (object_class, PROP_LOCATION,
g_param_spec_string ("location", "Location",
"The URL to display",
nullptr, (GParamFlags) (G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_PLAYING)));
g_object_class_install_property (object_class, PROP_PROCESSING_DEADLINE,
g_param_spec_uint64 ("processing-deadline", "Processing deadline",
"Maximum processing time for a buffer in nanoseconds", 0, G_MAXUINT64,
DEFAULT_PROCESSING_DEADLINE, (GParamFlags) (G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_PLAYING)));
g_object_class_install_property (object_class, PROP_JAVASCRIPT,
g_param_spec_string ("javascript", "Javascript",
"Javascript to run on nevigation completed",
nullptr, (GParamFlags) (G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_PLAYING)));
g_object_class_install_property (object_class, PROP_USER_DATA_FOLDER,
g_param_spec_string ("user-data-folder", "User Data Folder",
"Absolute path to WebView2 user data folder location.", nullptr,
(GParamFlags) (G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_READY)));
gst_element_class_set_static_metadata (element_class,
"WebView2 Source", "Source/Video",
"Creates a video stream rendered by WebView2",
"Seungha Yang <seungha@centricular.com>");
gst_element_class_add_static_pad_template (element_class, &pad_template);
element_class->provide_clock =
GST_DEBUG_FUNCPTR (gst_webview2_src_provide_clock);
element_class->set_context = GST_DEBUG_FUNCPTR (gst_webview2_src_set_context);
src_class->start = GST_DEBUG_FUNCPTR (gst_webview2_src_start);
src_class->stop = GST_DEBUG_FUNCPTR (gst_webview2_src_stop);
src_class->unlock = GST_DEBUG_FUNCPTR (gst_webview2_src_unlock);
src_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_webview2_src_unlock_stop);
src_class->query = GST_DEBUG_FUNCPTR (gst_webview2_src_query);
src_class->fixate = GST_DEBUG_FUNCPTR (gst_webview2_src_fixate);
src_class->set_caps = GST_DEBUG_FUNCPTR (gst_webview2_src_set_caps);
src_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_webview2_decide_allocation);
src_class->event = GST_DEBUG_FUNCPTR (gst_webview2_src_event);
src_class->create = GST_DEBUG_FUNCPTR (gst_webview2_src_create);
GST_DEBUG_CATEGORY_INIT (gst_webview2_src_debug, "webview2src",
0, "webview2src");
}
static void
gst_webview2_src_init (GstWebView2Src * self)
{
gst_base_src_set_format (GST_BASE_SRC (self), GST_FORMAT_TIME);
gst_base_src_set_live (GST_BASE_SRC (self), TRUE);
self->priv = new GstWebView2SrcPrivate ();
GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_PROVIDE_CLOCK);
GST_OBJECT_FLAG_SET (self, GST_ELEMENT_FLAG_REQUIRE_CLOCK);
}
static void
gst_webview2_src_finalize (GObject * object)
{
auto self = GST_WEBVIEW2_SRC (object);
delete self->priv;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_webview2_src_set_location (GstWebView2Src * self, const gchar * location)
{
auto priv = self->priv;
priv->location.clear ();
if (location)
priv->location = location;
else
priv->location = DEFAULT_LOCATION;
if (priv->object) {
gst_webview2_object_set_location (priv->object,
priv->location, priv->script);
}
}
static void
gst_webview2_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
auto self = GST_WEBVIEW2_SRC (object);
auto priv = self->priv;
std::unique_lock < std::mutex > lk (priv->lock);
switch (prop_id) {
case PROP_ADAPTER:
priv->adapter_index = g_value_get_int (value);
break;
case PROP_LOCATION:
gst_webview2_src_set_location (self, g_value_get_string (value));
break;
case PROP_PROCESSING_DEADLINE:
{
GstClockTime prev_val, new_val;
prev_val = priv->processing_deadline;
new_val = g_value_get_uint64 (value);
priv->processing_deadline = new_val;
if (prev_val != new_val) {
lk.unlock ();
GST_DEBUG_OBJECT (self, "Posting latency message");
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_message_new_latency (GST_OBJECT_CAST (self)));
}
break;
}
case PROP_JAVASCRIPT:
{
auto script = g_value_get_string (value);
if (script)
priv->script = script;
else
priv->script.clear ();
if (priv->object) {
gst_webview2_object_set_location (priv->object, priv->location,
priv->script);
}
break;
}
case PROP_USER_DATA_FOLDER:
{
auto udf = g_value_get_string (value);
if (udf)
priv->user_data_folder = udf;
else
priv->user_data_folder.clear ();
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_win32_video_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
auto self = GST_WEBVIEW2_SRC (object);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
switch (prop_id) {
case PROP_ADAPTER:
g_value_set_int (value, priv->adapter_index);
break;
case PROP_LOCATION:
g_value_set_string (value, priv->location.c_str ());
break;
case PROP_PROCESSING_DEADLINE:
g_value_set_uint64 (value, priv->processing_deadline);
break;
case PROP_JAVASCRIPT:
g_value_set_string (value, priv->script.c_str ());
break;
case PROP_USER_DATA_FOLDER:
g_value_set_string (value, priv->script.c_str ());
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstClock *
gst_webview2_src_provide_clock (GstElement * elem)
{
return gst_system_clock_obtain ();
}
static void
gst_webview2_src_set_context (GstElement * elem, GstContext * context)
{
auto self = GST_WEBVIEW2_SRC (elem);
auto priv = self->priv;
gst_d3d11_handle_set_context (elem,
context, priv->adapter_index, &priv->device);
GST_ELEMENT_CLASS (parent_class)->set_context (elem, context);
}
static gboolean
gst_webview2_src_start (GstBaseSrc * src)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
auto elem = GST_ELEMENT_CAST (src);
HRESULT hr;
GST_DEBUG_OBJECT (self, "Start");
priv->ClearResource ();
if (!gst_d3d11_ensure_element_data (elem, priv->adapter_index, &priv->device)) {
GST_ERROR_OBJECT (self, "Couldn't get D3D11 device");
return FALSE;
}
gint64 luid;
g_object_get (priv->device, "adapter-luid", &luid, nullptr);
if (!gst_d3d12_ensure_element_data_for_adapter_luid (elem,
luid, &priv->device12)) {
GST_ERROR_OBJECT (self, "Couldn't get d3d12 device");
return FALSE;
}
auto device = gst_d3d11_device_get_device_handle (priv->device);
device->QueryInterface (IID_PPV_ARGS (&priv->device_5));
auto context = gst_d3d11_device_get_device_context_handle (priv->device);
context->QueryInterface (IID_PPV_ARGS (&priv->context4));
if (priv->device_5 && priv->context4) {
hr = priv->device_5->CreateFence (0, D3D11_FENCE_FLAG_SHARED,
IID_PPV_ARGS (&priv->fence11));
if (gst_d3d11_result (hr, priv->device)) {
HANDLE fence_handle;
hr = priv->fence11->CreateSharedHandle (nullptr, GENERIC_ALL, nullptr,
&fence_handle);
if (gst_d3d11_result (hr, priv->device)) {
auto device12 = gst_d3d12_device_get_device_handle (priv->device12);
hr = device12->OpenSharedHandle (fence_handle,
IID_PPV_ARGS (&priv->fence12));
CloseHandle (fence_handle);
if (gst_d3d12_result (hr, priv->device12))
priv->can_d3d12_copy = TRUE;
}
}
}
GST_DEBUG_OBJECT (self, "D3D12 copy support: %d", priv->can_d3d12_copy);
std::lock_guard < std::mutex > lk (priv->lock);
priv->object = gst_webview2_object_new (priv->device, priv->user_data_folder);
if (!priv->object) {
GST_ERROR_OBJECT (self, "Couldn't create object");
return FALSE;
}
gst_webview2_object_set_location (priv->object, priv->location, priv->script);
priv->last_frame_no = -1;
return TRUE;
}
static gboolean
gst_webview2_src_stop (GstBaseSrc * src)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
GST_DEBUG_OBJECT (self, "Stop");
priv->ClearResource ();
gst_clear_object (&priv->object);
gst_clear_object (&priv->device);
gst_clear_object (&priv->device12);
return TRUE;
}
static gboolean
gst_webview2_src_unlock (GstBaseSrc * src)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
GST_DEBUG_OBJECT (self, "Unlock");
std::lock_guard < std::mutex > lk (priv->lock);
if (priv->object)
gst_webview2_object_set_flushing (priv->object, true);
if (priv->clock_id)
gst_clock_id_unschedule (priv->clock_id);
return TRUE;
}
static gboolean
gst_webview2_src_unlock_stop (GstBaseSrc * src)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
GST_DEBUG_OBJECT (self, "Unlock stop");
std::lock_guard < std::mutex > lk (priv->lock);
if (priv->object)
gst_webview2_object_set_flushing (priv->object, false);
return TRUE;
}
static gboolean
gst_webview2_src_query (GstBaseSrc * src, GstQuery * query)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
std::lock_guard < std::mutex > lk (priv->lock);
if (GST_CLOCK_TIME_IS_VALID (priv->processing_deadline)) {
gst_query_set_latency (query, TRUE, priv->processing_deadline,
GST_CLOCK_TIME_NONE);
} else {
gst_query_set_latency (query, TRUE, 0, 0);
}
return TRUE;
}
case GST_QUERY_CONTEXT:
if (gst_d3d11_handle_context_query (GST_ELEMENT (self), query,
priv->device)) {
return TRUE;
}
break;
default:
break;
}
return GST_BASE_SRC_CLASS (parent_class)->query (src, query);
}
static GstCaps *
gst_webview2_src_fixate (GstBaseSrc * src, GstCaps * caps)
{
caps = gst_caps_make_writable (caps);
auto s = gst_caps_get_structure (caps, 0);
gst_structure_fixate_field_nearest_int (s, "width", 1920);
gst_structure_fixate_field_nearest_int (s, "height", 1080);
gst_structure_fixate_field_nearest_fraction (s, "framerate", 30, 1);
return GST_BASE_SRC_CLASS (parent_class)->fixate (src, caps);
}
static gboolean
gst_webview2_src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
if (!gst_video_info_from_caps (&priv->info, caps)) {
GST_ERROR_OBJECT (self, "Invalid caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
GST_DEBUG_OBJECT (self, "Set caps %" GST_PTR_FORMAT, caps);
priv->staging = nullptr;
if (priv->object) {
gst_webview_object_update_size (priv->object,
priv->info.width, priv->info.height);
}
return TRUE;
}
static gboolean
gst_webview2_decide_allocation (GstBaseSrc * src, GstQuery * query)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
GstCaps *caps;
gst_query_parse_allocation (query, &caps, nullptr);
if (!caps) {
GST_ERROR_OBJECT (self, "No output caps");
return FALSE;
}
GstVideoInfo info;
gst_video_info_from_caps (&info, caps);
gboolean update_pool = FALSE;
GstBufferPool *pool = nullptr;
guint min, max, size;
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 = info.size;
min = max = 0;
update_pool = FALSE;
}
auto features = gst_caps_get_features (caps, 0);
auto is_d3d11 = gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_D3D11_MEMORY);
auto is_d3d12 = gst_caps_features_contains (features,
GST_CAPS_FEATURE_MEMORY_D3D12_MEMORY);
if (pool) {
if (is_d3d11) {
if (!GST_IS_D3D11_BUFFER_POOL (pool)) {
gst_clear_object (&pool);
} else {
auto d3d11_pool = GST_D3D11_BUFFER_POOL (pool);
if (d3d11_pool->device != priv->device)
gst_clear_object (&pool);
}
} else if (is_d3d12) {
if (!GST_IS_D3D12_BUFFER_POOL (pool)) {
gst_clear_object (&pool);
} else {
auto d3d12_pool = GST_D3D12_BUFFER_POOL (pool);
if (!gst_d3d12_device_is_equal (d3d12_pool->device, priv->device12))
gst_clear_object (&pool);
}
}
}
if (!pool) {
if (is_d3d11)
pool = gst_d3d11_buffer_pool_new (priv->device);
else if (is_d3d12)
pool = gst_d3d12_buffer_pool_new (priv->device12);
else
pool = gst_video_buffer_pool_new ();
}
auto 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 (is_d3d11) {
auto params = gst_buffer_pool_config_get_d3d11_allocation_params (config);
if (!params) {
params = gst_d3d11_allocation_params_new (priv->device, &info,
GST_D3D11_ALLOCATION_FLAG_DEFAULT,
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET, 0);
} else {
gst_d3d11_allocation_params_set_bind_flags (params,
D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET);
}
gst_buffer_pool_config_set_d3d11_allocation_params (config, params);
gst_d3d11_allocation_params_free (params);
} else if (is_d3d12) {
auto params = gst_buffer_pool_config_get_d3d12_allocation_params (config);
if (!params) {
params = gst_d3d12_allocation_params_new (priv->device12, &info,
GST_D3D12_ALLOCATION_FLAG_DEFAULT,
D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS |
D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET, D3D12_HEAP_FLAG_SHARED);
} else {
gst_d3d12_allocation_params_set_resource_flags (params,
D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS |
D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET);
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;
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, nullptr, &size, nullptr, nullptr);
gst_structure_free (config);
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_webview2_src_event (GstBaseSrc * src, GstEvent * event)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
std::unique_lock < std::mutex > lk (priv->lock);
if (priv->object || GST_EVENT_TYPE (event) == GST_EVENT_NAVIGATION) {
gst_webview2_object_send_event (priv->object, event);
return TRUE;
}
lk.unlock ();
return GST_BASE_SRC_CLASS (parent_class)->event (src, event);
}
static GstFlowReturn
gst_webview2_src_create (GstBaseSrc * src, guint64 offset, guint size,
GstBuffer ** buf)
{
auto self = GST_WEBVIEW2_SRC (src);
auto priv = self->priv;
GstFlowReturn ret;
GstClock *clock;
GstClockTime base_time;
GstClockTime now_gst;
GstClockTime next_capture_ts;
guint64 next_frame_no = 0;
GstBuffer *buffer;
gint fps_n, fps_d;
GstClockTime dur = GST_CLOCK_TIME_NONE;
clock = gst_element_get_clock (GST_ELEMENT_CAST (self));
now_gst = gst_clock_get_time (clock);
base_time = GST_ELEMENT_CAST (self)->base_time;
next_capture_ts = now_gst - base_time;
fps_n = priv->info.fps_n;
fps_d = priv->info.fps_d;
if (fps_n > 0 && fps_d > 0) {
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;
std::unique_lock < std::mutex > lk (priv->lock);
next_frame_no++;
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;
lk.unlock ();
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) {
gst_object_unref (clock);
return GST_FLOW_FLUSHING;
}
dur = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
} else {
GstClockTime next_frame_ts = gst_util_uint64_scale (next_frame_no + 1,
fps_d * GST_SECOND, fps_n);
dur = next_frame_ts - next_capture_ts;
}
}
gst_clear_object (&clock);
priv->last_frame_no = next_frame_no;
auto pool = gst_base_src_get_buffer_pool (src);
if (!pool) {
GST_ERROR_OBJECT (self, "No configured pool");
return GST_FLOW_ERROR;
}
ret = gst_buffer_pool_acquire_buffer (pool, &buffer, nullptr);
gst_object_unref (pool);
if (ret != GST_FLOW_OK)
return ret;
auto device = gst_d3d11_device_get_device_handle (priv->device);
ComPtr < ID3D11Texture2D > out_texture;
gboolean system_copy = TRUE;
gboolean is_d3d12 = FALSE;
GstMapInfo out_map;
auto mem = gst_buffer_peek_memory (buffer, 0);
if (gst_is_d3d11_memory (mem)) {
auto dmem = GST_D3D11_MEMORY_CAST (mem);
if (dmem->device == priv->device) {
if (!gst_memory_map (mem, &out_map, (GstMapFlags)
(GST_MAP_D3D11 | GST_MAP_WRITE))) {
GST_ERROR_OBJECT (self, "Couldn't map output memory");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
out_texture = (ID3D11Texture2D *) out_map.data;
system_copy = FALSE;
}
} else if (priv->can_d3d12_copy && gst_is_d3d12_memory (mem)) {
auto dmem = GST_D3D12_MEMORY_CAST (mem);
if (gst_d3d12_device_is_equal (dmem->device, priv->device12)) {
out_texture = gst_d3d12_memory_get_d3d11_texture (dmem, device);
if (out_texture) {
gst_d3d12_memory_sync (dmem);
if (!gst_memory_map (mem, &out_map, GST_MAP_WRITE_D3D12)) {
GST_ERROR_OBJECT (self, "Couldn't map output d3d12 memory");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
is_d3d12 = TRUE;
system_copy = FALSE;
}
}
}
if (!out_texture) {
if (!priv->staging) {
D3D11_TEXTURE2D_DESC staging_desc = { };
staging_desc.Width = priv->info.width;
staging_desc.Height = priv->info.height;
staging_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
staging_desc.MipLevels = 1;
staging_desc.SampleDesc.Count = 1;
staging_desc.ArraySize = 1;
staging_desc.Usage = D3D11_USAGE_STAGING;
staging_desc.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
auto hr = device->CreateTexture2D (&staging_desc,
nullptr, &priv->staging);
if (!gst_d3d11_result (hr, priv->device)) {
GST_ERROR_OBJECT (self, "Couldn't create staging texture");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
}
out_texture = priv->staging;
GST_TRACE_OBJECT (self, "Do CPU copy");
} else {
GST_TRACE_OBJECT (self, "Do GPU copy");
}
ret = gst_webview2_object_do_capture (priv->object, out_texture.Get (),
priv->context4.Get (), priv->fence11.Get (), &priv->fence_val, is_d3d12);
if (ret != GST_FLOW_OK) {
if (!system_copy)
gst_memory_unmap (mem, &out_map);
gst_buffer_unref (buffer);
return ret;
}
if (!system_copy) {
gst_memory_unmap (mem, &out_map);
if (is_d3d12) {
auto dmem = GST_D3D12_MEMORY_CAST (mem);
gst_d3d12_memory_set_fence (dmem, priv->fence12.Get (), priv->fence_val,
FALSE);
}
} else {
auto context = gst_d3d11_device_get_device_context_handle (priv->device);
D3D11_MAPPED_SUBRESOURCE map;
GstD3D11DeviceLockGuard lk (priv->device);
auto hr = context->Map (priv->staging.Get (), 0, D3D11_MAP_READ, 0, &map);
if (!gst_d3d11_result (hr, priv->device)) {
GST_ERROR_OBJECT (self, "Couldn't map staging texture");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
GstVideoFrame frame;
if (!gst_video_frame_map (&frame, &priv->info, buffer, GST_MAP_WRITE)) {
GST_ERROR_OBJECT (self, "Couldn't map output frame");
context->Unmap (priv->staging.Get (), 0);
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
auto width_in_bytes = priv->info.width * 4;
auto src_data = (guint8 *) map.pData;
auto dst_data = (guint8 *) GST_VIDEO_FRAME_PLANE_DATA (&frame, 0);
for (guint i = 0; i < priv->info.height; i++) {
memcpy (dst_data, src_data, width_in_bytes);
src_data += map.RowPitch;
dst_data += GST_VIDEO_FRAME_PLANE_STRIDE (&frame, 0);
}
context->Unmap (priv->staging.Get (), 0);
gst_video_frame_unmap (&frame);
}
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;
}
static GstURIType
gst_webview2_src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_webview2_src_get_protocols (GType type)
{
static const gchar *protocols[] = { "web+http", "web+https", nullptr };
return protocols;
}
static gchar *
gst_webview2_src_get_uri (GstURIHandler * handler)
{
auto self = GST_WEBVIEW2_SRC (handler);
auto priv = self->priv;
std::lock_guard < std::mutex > lk (priv->lock);
if (priv->location.empty ())
return nullptr;
return g_strdup (priv->location.c_str ());
}
static gboolean
gst_webview2_src_set_uri (GstURIHandler * handler, const gchar * uri_str,
GError ** err)
{
auto self = GST_WEBVIEW2_SRC (handler);
auto priv = self->priv;
auto protocol = gst_uri_get_protocol (uri_str);
if (!g_str_has_prefix (protocol, "web+")) {
g_free (protocol);
return FALSE;
}
auto uri = gst_uri_from_string (uri_str);
gst_uri_set_scheme (uri, protocol + 4);
auto location = gst_uri_to_string (uri);
std::lock_guard < std::mutex > lk (priv->lock);
gst_webview2_src_set_location (self, location);
gst_uri_unref (uri);
g_free (protocol);
g_free (location);
return TRUE;
}
static void
gst_webview2_src_uri_handler_init (gpointer iface, gpointer data)
{
auto handler = (GstURIHandlerInterface *) iface;
handler->get_type = gst_webview2_src_uri_get_type;
handler->get_protocols = gst_webview2_src_get_protocols;
handler->get_uri = gst_webview2_src_get_uri;
handler->set_uri = gst_webview2_src_set_uri;
}