gstreamer/subprojects/gst-plugins-bad/tests/examples/d3d11/d3d11screencapturesrc.cpp
Seungha Yang e0a9a73adf d3d11screencapturesrc: Fix crash when d3d11 device is different from owned one
GstD3D11ScreenCapture object is pipeline-independent global object
and the object can be shared by multiple src elements,
in order to overcome a limitation of DXGI Desktop Duplication API.
Note that the API allows only single capture session in a process for
a monitor.

Therefore GstD3D11ScreenCapture object must be able to handle a case
where a src element holds different GstD3D11Device object. Which can
happen when GstD3D11Device context is not shared by pipelines.

What's changed:
* Allocates capture texture with D3D11_RESOURCE_MISC_SHARED for the
  texture to be able to copied into other device's texture
* Holds additional shader objects per src element and use it when drawing
  mouse

Fixes: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1197
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2366>
2022-05-05 18:18:57 +00:00

254 lines
7.6 KiB
C++

/* GStreamer
* Copyright (C) 2021 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <windows.h>
static GstDevice *
enum_devices (gboolean only_show, gint monitor_idx, guint64 monitor_handle)
{
GstDeviceMonitor *monitor;
GstCaps *caps;
GList *devices, *iter;
gboolean ret;
guint i;
GstDevice *target = nullptr;
monitor = gst_device_monitor_new ();
/* Filtering by using d3d11 memory caps with "Source/Monitor" class */
caps = gst_caps_from_string ("video/x-raw(memory:D3D11Memory)");
ret = gst_device_monitor_add_filter (monitor, "Source/Monitor", caps);
gst_caps_unref (caps);
if (!ret) {
gst_object_unref (monitor);
g_warning ("Failed to setup device monitor");
return nullptr;
}
gst_device_monitor_start (monitor);
devices = gst_device_monitor_get_devices (monitor);
if (!devices) {
g_warning ("No detected d3d11 monitor device");
gst_device_monitor_stop (monitor);
gst_object_unref (monitor);
return nullptr;
}
gst_println ("Found %d monitor device(s)", g_list_length (devices));
for (iter = devices, i = 0; iter; iter = g_list_next (iter), i++) {
GstDevice *dev = GST_DEVICE (iter->data);
GstStructure *s;
guint disp_coord_left, disp_coord_top, disp_coord_right, disp_coord_bottom;
gchar *name = nullptr;
gchar *adapter_desc = nullptr;
guint64 hmonitor;
HMONITOR handle;
gboolean primary;
s = gst_device_get_properties (dev);
gst_structure_get (s,
"display.coordinates.left", G_TYPE_INT, &disp_coord_left,
"display.coordinates.top", G_TYPE_INT, &disp_coord_top,
"display.coordinates.right", G_TYPE_INT, &disp_coord_right,
"display.coordinates.bottom", G_TYPE_INT, &disp_coord_bottom,
"device.adapter.description", G_TYPE_STRING, &adapter_desc,
"device.hmonitor", G_TYPE_UINT64, &hmonitor,
"device.primary", G_TYPE_BOOLEAN, &primary, nullptr);
name = gst_device_get_display_name (dev);
handle = (HMONITOR) hmonitor;
gst_println ("Monitor %d (%s - %s):", i, name, adapter_desc);
gst_println (" HMONITOR: %p (%" G_GUINT64_FORMAT ")", handle, hmonitor);
gst_println (" Display Coordinates (left:top:right:bottom): %d:%d:%d:%d\n",
disp_coord_left, disp_coord_top, disp_coord_right, disp_coord_bottom);
g_free (adapter_desc);
g_free (name);
if (!only_show && !target) {
if (monitor_handle != 0) {
if (monitor_handle == hmonitor) {
target = (GstDevice *) gst_object_ref (dev);
}
} else if (monitor_idx < 0) {
if (primary) {
target = (GstDevice *) gst_object_ref (dev);
}
} else if (monitor_idx == i) {
target = (GstDevice *) gst_object_ref (dev);
}
if (target)
gst_println ("Found target monitor device");
}
}
g_list_free_full (devices, gst_object_unref);
return target;
}
static gboolean
bus_msg (GstBus * bus, GstMessage * msg, GMainLoop * loop)
{
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR:{
GError *err;
gchar *dbg;
gst_message_parse_error (msg, &err, &dbg);
g_printerr ("ERROR %s \n", err->message);
if (dbg != NULL)
g_printerr ("ERROR debug information: %s\n", dbg);
g_clear_error (&err);
g_free (dbg);
g_main_loop_quit (loop);
break;
}
default:
break;
}
return TRUE;
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline, *src, *queue, *sink;
GstElement *pipeline_1 = nullptr, *src_1, *queue_1, *sink_1;
GMainLoop *loop;
gboolean ret;
gboolean show_devices = FALSE;
gboolean multi_pipelines = FALSE;
gboolean show_cursor = FALSE;
gint64 hmonitor = 0;
gint monitor_index = -1;
GError *err = nullptr;
GstDevice *device;
GOptionContext *option_ctx;
GOptionEntry options[] = {
{"show-devices", 0, 0, G_OPTION_ARG_NONE, &show_devices,
"Display available monitor devices", nullptr},
{"hmonitor", 0, 0, G_OPTION_ARG_INT64, &hmonitor,
"Address of HMONITOR handle", nullptr},
{"index", 0, 0, G_OPTION_ARG_INT, &monitor_index,
"Monitor index to capture (-1 for primary monitor)", nullptr},
{"multi-pipelines", 0, 0, G_OPTION_ARG_NONE, &multi_pipelines,
"Run two separate pipelines for capturing a single monitor", nullptr},
{"show-cursor", 0, 0, G_OPTION_ARG_NONE, &show_cursor,
"Draw mouse cursor", nullptr},
{nullptr}
};
option_ctx = g_option_context_new ("D3D11 screen capture example");
g_option_context_add_main_entries (option_ctx, options, NULL);
g_option_context_add_group (option_ctx, gst_init_get_option_group ());
ret = g_option_context_parse (option_ctx, &argc, &argv, &err);
g_option_context_free (option_ctx);
if (!ret) {
g_printerr ("option parsing failed: %s\n", err->message);
g_clear_error (&err);
return 1;
}
device = enum_devices (show_devices, monitor_index, (guint64) hmonitor);
if (show_devices) {
gst_clear_object (&device);
return 0;
}
if (!device) {
gst_println ("Failed to find monitor device");
return 1;
}
src = gst_device_create_element (device, nullptr);
if (!src) {
g_warning ("Failed to create d3d11screencapture element");
return 1;
}
g_object_set (src, "show-cursor", show_cursor, nullptr);
if (multi_pipelines) {
src_1 = gst_device_create_element (device, nullptr);
if (!src_1) {
g_warning ("Failed to create second d3d11screencapture element");
return 1;
}
g_object_set (src_1, "show-cursor", show_cursor, nullptr);
}
gst_object_unref (device);
loop = g_main_loop_new (nullptr, FALSE);
pipeline = gst_pipeline_new (nullptr);
queue = gst_element_factory_make ("queue", nullptr);
sink = gst_element_factory_make ("d3d11videosink", nullptr);
gst_bin_add_many (GST_BIN (pipeline), src, queue, sink, nullptr);
gst_element_link_many (src, queue, sink, nullptr);
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), (GstBusFunc) bus_msg, loop);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (multi_pipelines) {
pipeline_1 = gst_pipeline_new (nullptr);
queue_1 = gst_element_factory_make ("queue", nullptr);
sink_1 = gst_element_factory_make ("d3d11videosink", nullptr);
gst_bin_add_many (GST_BIN (pipeline_1), src_1, queue_1, sink_1, nullptr);
gst_element_link_many (src_1, queue_1, sink_1, nullptr);
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline_1), (GstBusFunc) bus_msg, loop);
gst_element_set_state (pipeline_1, GST_STATE_PLAYING);
}
g_main_loop_run (loop);
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
gst_object_unref (pipeline);
if (multi_pipelines) {
gst_element_set_state (pipeline_1, GST_STATE_NULL);
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
gst_object_unref (pipeline_1);
}
g_main_loop_unref (loop);
return 0;
}