examples: Add d3d11videosink examples for shared-texture use cases

Add two examples to demonstrate "draw-on-shared-texture" use cases.

d3d11videosink will draw application's own texture without copy
by using:
- Enable "draw-on-shared-texture" property
- make use of "begin-draw" and "draw" signals

And then, application will render the shared application's texture
to swapchain's backbuffer by using
1) Direct3D11 APIs
2) Or, Direct3D9Ex + interop APIs

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1873>
This commit is contained in:
Seungha Yang 2020-12-11 05:23:20 +09:00 committed by GStreamer Merge Bot
parent 60e223f4fd
commit 657370a91c
5 changed files with 1317 additions and 0 deletions

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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "d3d11device.h"
#include <d3dcompiler.h>
#include <wrl.h>
#include <string.h>
using namespace Microsoft::WRL;
HRESULT
prepare_d3d11_device (ID3D11Device ** d3d11_device,
ID3D11DeviceContext ** d3d11_context, IDXGIFactory2 ** dxgi_factory)
{
HRESULT hr;
static const D3D_FEATURE_LEVEL feature_levels[] = {
D3D_FEATURE_LEVEL_11_1,
D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0,
D3D_FEATURE_LEVEL_9_3,
D3D_FEATURE_LEVEL_9_2,
D3D_FEATURE_LEVEL_9_1
};
D3D_FEATURE_LEVEL selected_level;
ComPtr<IDXGIFactory1> factory;
hr = CreateDXGIFactory1 (IID_PPV_ARGS (&factory));
if (FAILED (hr)) {
gst_printerrln ("IDXGIFactory1 is unavailable, hr 0x%x", (guint) hr);
return hr;
}
ComPtr<IDXGIFactory2> factory2;
hr = factory.As (&factory2);
if (FAILED (hr)) {
gst_printerrln ("IDXGIFactory2 is unavailable, hr 0x%x", (guint) hr);
return hr;
}
ComPtr<IDXGIAdapter1> adapter;
hr = factory->EnumAdapters1 (0, &adapter);
if (FAILED (hr)) {
gst_printerrln ("IDXGIAdapter1 is unavailable, hr 0x%x", (guint) hr);
return hr;
}
ComPtr<ID3D11Device> device;
ComPtr<ID3D11DeviceContext> context;
hr = D3D11CreateDevice (adapter.Get(), D3D_DRIVER_TYPE_UNKNOWN,
NULL, D3D11_CREATE_DEVICE_BGRA_SUPPORT, feature_levels,
G_N_ELEMENTS (feature_levels), D3D11_SDK_VERSION, &device,
&selected_level, &context);
/* Try again with excluding D3D_FEATURE_LEVEL_11_1 */
if (FAILED (hr)) {
hr = D3D11CreateDevice (adapter.Get(), D3D_DRIVER_TYPE_UNKNOWN,
NULL, D3D11_CREATE_DEVICE_BGRA_SUPPORT, &feature_levels[1],
G_N_ELEMENTS (feature_levels) - 1, D3D11_SDK_VERSION, &device,
&selected_level, &context);
}
if (FAILED (hr)) {
gst_printerrln ("ID3D11Device is unavailable, hr 0x%x", (guint) hr);
return hr;
}
if (d3d11_device)
*d3d11_device = device.Detach();
if (d3d11_context)
*d3d11_context = context.Detach();
if (dxgi_factory)
*dxgi_factory = factory2.Detach();
return hr;
}
HRESULT
prepare_shared_texture (ID3D11Device * d3d11_device, guint width,
guint height, DXGI_FORMAT format, UINT misc_flags,
ID3D11Texture2D ** texture, ID3D11ShaderResourceView ** srv,
IDXGIKeyedMutex ** keyed_mutex, HANDLE * shared_handle)
{
D3D11_TEXTURE2D_DESC texture_desc = { 0, };
HRESULT hr;
/* Texture size doesn't need to be identical to that of backbuffer */
texture_desc.Width = width;
texture_desc.Height = height;
texture_desc.MipLevels = 1;
texture_desc.Format = format;
texture_desc.SampleDesc.Count = 1;
texture_desc.ArraySize = 1;
texture_desc.Usage = D3D11_USAGE_DEFAULT;
texture_desc.BindFlags =
D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE;
texture_desc.MiscFlags = misc_flags;
ComPtr<ID3D11Texture2D> shared_texture;
hr = d3d11_device->CreateTexture2D (&texture_desc, nullptr, &shared_texture);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11Texture2D");
return hr;
}
ComPtr<ID3D11ShaderResourceView> shader_resource_view;
if (srv) {
D3D11_SHADER_RESOURCE_VIEW_DESC srv_desc = { 0, };
srv_desc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
srv_desc.Texture2D.MipLevels = 1;
srv_desc.Format = format;
hr = d3d11_device->CreateShaderResourceView (shared_texture.Get(), &srv_desc,
&shader_resource_view);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11ShaderResourceView");
return hr;
}
}
ComPtr<IDXGIKeyedMutex> keyed;
if ((misc_flags & D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX) != 0 && keyed_mutex) {
hr = shared_texture.As (&keyed);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get IDXGIKeyedMutex");
return hr;
}
}
ComPtr<IDXGIResource> dxgi_resource;
hr = shared_texture.As (&dxgi_resource);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get IDXGIResource handle");
return hr;
}
HANDLE handle;
if ((misc_flags & D3D11_RESOURCE_MISC_SHARED_NTHANDLE) != 0) {
ComPtr<IDXGIResource1> dxgi_resource1;
hr = dxgi_resource.As (&dxgi_resource1);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get IDXGIResource1");
return hr;
}
hr = dxgi_resource1->CreateSharedHandle (nullptr,
DXGI_SHARED_RESOURCE_READ | DXGI_SHARED_RESOURCE_WRITE, nullptr,
&handle);
} else {
hr = dxgi_resource->GetSharedHandle (&handle);
}
if (FAILED (hr)) {
gst_printerrln ("Couldn't get shared handle from texture");
return hr;
}
*texture = shared_texture.Detach();
if (srv)
*srv = shader_resource_view.Detach();
*shared_handle = handle;
if (keyed && keyed_mutex)
*keyed_mutex = keyed.Detach();
return S_OK;
}
static HRESULT
d3d_compile (const gchar * source, gboolean is_pixel_shader, ID3DBlob ** code)
{
HRESULT hr;
const gchar *shader_target = "ps_4_0";
if (!is_pixel_shader)
shader_target = "vs_4_0";
ComPtr<ID3DBlob> blob;
ComPtr<ID3DBlob> error;
hr = D3DCompile (source, strlen (source), nullptr, nullptr,
nullptr, "main", shader_target, 0, 0, &blob, &error);
if (FAILED (hr)) {
const gchar *err = nullptr;
if (error)
err = (const gchar *) error->GetBufferPointer ();
gst_printerrln ("Couldn't compile pixel shader, error: %s",
GST_STR_NULL (err));
return hr;
}
*code = blob.Detach();
return S_OK;
}
HRESULT
prepare_shader (ID3D11Device * d3d11_device, ID3D11DeviceContext * context,
ID3D11SamplerState ** sampler, ID3D11PixelShader ** ps,
ID3D11VertexShader ** vs, ID3D11InputLayout ** layout,
ID3D11Buffer ** vertex, ID3D11Buffer ** index)
{
static const gchar ps_code[] =
"Texture2D shaderTexture;\n"
"SamplerState samplerState;\n"
"\n"
"struct PS_INPUT\n"
"{\n"
" float4 Position: SV_POSITION;\n"
" float3 Texture: TEXCOORD0;\n"
"};\n"
"\n"
"struct PS_OUTPUT\n"
"{\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"
"}\n";
static const gchar vs_code[] =
"struct VS_INPUT\n"
"{\n"
" float4 Position : POSITION;\n"
" float4 Texture : TEXCOORD0;\n"
"};\n"
"\n"
"struct VS_OUTPUT\n"
"{\n"
" float4 Position: SV_POSITION;\n"
" float4 Texture: TEXCOORD0;\n"
"};\n"
"\n"
"VS_OUTPUT main(VS_INPUT input)\n"
"{\n"
" return input;\n"
"}\n";
D3D11_SAMPLER_DESC sampler_desc = { 0, };
sampler_desc.Filter = D3D11_FILTER_MIN_MAG_LINEAR_MIP_POINT;
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_ALWAYS;
sampler_desc.MinLOD = 0;
sampler_desc.MaxLOD = D3D11_FLOAT32_MAX;
ComPtr<ID3D11SamplerState> sampler_state;
HRESULT hr = d3d11_device->CreateSamplerState (&sampler_desc, &sampler_state);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11SamplerState");
return hr;
}
ComPtr<ID3DBlob> code;
hr = d3d_compile (ps_code, TRUE, &code);
if (FAILED (hr))
return hr;
ComPtr<ID3D11PixelShader> pixel_shader;
hr = d3d11_device->CreatePixelShader (code->GetBufferPointer(),
code->GetBufferSize(), nullptr, &pixel_shader);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11PixelShader");
return hr;
}
hr = d3d_compile (vs_code, FALSE, code.ReleaseAndGetAddressOf());
if (FAILED (hr))
return hr;
ComPtr<ID3D11VertexShader> vertex_shader;
hr = d3d11_device->CreateVertexShader (code->GetBufferPointer(),
code->GetBufferSize(), nullptr, &vertex_shader);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11VertexShader");
return hr;
}
D3D11_INPUT_ELEMENT_DESC input_desc[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0,
D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0 }
};
ComPtr<ID3D11InputLayout> input_layout;
hr = d3d11_device->CreateInputLayout (input_desc, G_N_ELEMENTS (input_desc),
code->GetBufferPointer(), code->GetBufferSize(), &input_layout);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11InputLayout");
return hr;
}
D3D11_BUFFER_DESC buffer_desc = { 0, };
buffer_desc.Usage = D3D11_USAGE_DYNAMIC;
buffer_desc.ByteWidth = sizeof (VertexData) * 4;
buffer_desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
buffer_desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
ComPtr<ID3D11Buffer> vertex_buffer;
hr = d3d11_device->CreateBuffer (&buffer_desc, nullptr, &vertex_buffer);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11Buffer for vertex buffer");
return hr;
}
D3D11_MAPPED_SUBRESOURCE map;
hr = context->Map (vertex_buffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &map);
if (FAILED (hr)) {
gst_printerrln ("Couldn't map vertex buffer");
return hr;
}
VertexData *vertex_data = (VertexData *) map.pData;
vertex_data[0].position.x = -1.0f;
vertex_data[0].position.y = -1.0f;
vertex_data[0].position.z = 0.0f;
vertex_data[0].texture.x = 0.0f;
vertex_data[0].texture.y = 1.0f;
vertex_data[1].position.x = -1.0f;
vertex_data[1].position.y = 1.0f;
vertex_data[1].position.z = 0.0f;
vertex_data[1].texture.x = 0.0f;
vertex_data[1].texture.y = 0.0f;
vertex_data[2].position.x = 1.0f;
vertex_data[2].position.y = 1.0f;
vertex_data[2].position.z = 0.0f;
vertex_data[2].texture.x = 1.0f;
vertex_data[2].texture.y = 0.0f;
vertex_data[3].position.x = 1.0f;
vertex_data[3].position.y = -1.0f;
vertex_data[3].position.z = 0.0f;
vertex_data[3].texture.x = 1.0f;
vertex_data[3].texture.y = 1.0f;
context->Unmap (vertex_buffer.Get(), 0);
ComPtr<ID3D11Buffer> index_buffer;
buffer_desc.ByteWidth = sizeof (WORD) * 2 * 3;
buffer_desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
hr = d3d11_device->CreateBuffer (&buffer_desc, nullptr, &index_buffer);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create ID3D11Buffer for index buffer");
return hr;
}
hr = context->Map (index_buffer.Get(), 0, D3D11_MAP_WRITE_DISCARD, 0, &map);
if (FAILED (hr)) {
gst_printerrln ("Couldn't map index buffer");
return hr;
}
WORD *indices = (WORD *) map.pData;
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 3;
indices[4] = 0;
indices[5] = 2;
context->Unmap (index_buffer.Get(), 0);
*sampler = sampler_state.Detach();
*ps = pixel_shader.Detach();
*vs = vertex_shader.Detach();
*layout = input_layout.Detach();
*vertex = vertex_buffer.Detach();
*index = index_buffer.Detach();
return S_OK;
}

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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.
*/
#include <gst/gst.h>
#include <windows.h>
#include <d3d11.h>
#include <dxgi1_2.h>
typedef struct
{
struct {
FLOAT x;
FLOAT y;
FLOAT z;
} position;
struct {
FLOAT x;
FLOAT y;
} texture;
} VertexData;
HRESULT
prepare_d3d11_device (ID3D11Device ** d3d11_device,
ID3D11DeviceContext ** d3d11_context,
IDXGIFactory2 ** dxgi_factory);
HRESULT
prepare_shared_texture (ID3D11Device * d3d11_device,
guint width,
guint height,
DXGI_FORMAT format,
UINT misc_flags,
ID3D11Texture2D ** texture,
ID3D11ShaderResourceView ** srv,
IDXGIKeyedMutex ** keyed_mutex,
HANDLE * shared_handle);
HRESULT
prepare_shader (ID3D11Device * d3d11_device,
ID3D11DeviceContext * context,
ID3D11SamplerState ** sampler,
ID3D11PixelShader ** ps,
ID3D11VertexShader ** vs,
ID3D11InputLayout ** layout,
ID3D11Buffer ** vertex,
ID3D11Buffer ** index);

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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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "d3d11device.h"
#include <wrl.h>
#include <mutex>
#include <d3d9.h>
using namespace Microsoft::WRL;
static gchar *uri = nullptr;
static GMainLoop *loop = nullptr;
static gboolean visible = FALSE;
static HWND hwnd = nullptr;
std::mutex lock;
/* Device handles */
ComPtr<ID3D11Device> device;
ComPtr<ID3D11DeviceContext> context;
ComPtr<IDXGIFactory2> factory;
ComPtr<IDirect3D9Ex> d3d9_handle;
ComPtr<IDirect3DDevice9Ex> d3d9_device;
/* SwapChain resources */
ComPtr<IDirect3DSwapChain9> swapchain;
/* Shard texture resources */
ComPtr<ID3D11Texture2D> shared_texture;
ComPtr<IDirect3DTexture9> shared_d3d9_texture;
ComPtr<IDirect3DSurface9> d3d9_surface;
HANDLE shared_handle = nullptr;
static void
on_begin_draw (GstElement * videosink, gpointer user_data)
{
std::lock_guard<std::mutex> lk (lock);
GstElement *sink = GST_ELEMENT (user_data);
gboolean ret = TRUE;
HRESULT hr;
ComPtr<IDirect3DSurface9> backbuffer;
/* Windows was destroyed, nothing to draw */
if (!hwnd)
return;
if (!shared_handle) {
gst_printerrln ("Shared handle wasn't configured");
exit (-1);
}
if (!swapchain) {
gst_printerrln ("SwapChain wasn't configured");
exit (-1);
}
g_signal_emit_by_name (sink,
"draw", shared_handle, D3D11_RESOURCE_MISC_SHARED, 0, 0, &ret);
if (!ret) {
gst_printerrln ("Failed to draw on shared handle");
if (loop)
g_main_loop_quit (loop);
return;
}
/* Get swapchain's backbuffer */
hr = swapchain->GetBackBuffer (0, D3DBACKBUFFER_TYPE_MONO, &backbuffer);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get backbuffer");
exit (-1);
}
/* Copy shared texture to backbuffer */
hr = d3d9_device->StretchRect (d3d9_surface.Get(), nullptr,
backbuffer.Get(), nullptr, D3DTEXF_LINEAR);
if (FAILED (hr)) {
gst_printerrln ("StretchRect failed");
exit (-1);
}
hr = d3d9_device->BeginScene ();
if (FAILED (hr)) {
gst_printerrln ("BeginScene failed");
exit (-1);
}
hr = swapchain->Present (nullptr, nullptr, nullptr, nullptr, 0);
if (FAILED (hr)) {
gst_printerrln ("Present failed");
exit (-1);
}
hr = d3d9_device->EndScene ();
if (FAILED (hr)) {
gst_printerrln ("BeginScene failed");
exit (-1);
}
}
static void
on_resize (void)
{
std::lock_guard<std::mutex> lk (lock);
RECT client_rect;
guint width, height;
HRESULT hr;
GetClientRect (hwnd, &client_rect);
width = MAX (1, (client_rect.right - client_rect.left));
height = MAX (1, (client_rect.bottom - client_rect.top));
D3DPRESENT_PARAMETERS params = { 0, };
if (!swapchain) {
params.Windowed = TRUE;
params.SwapEffect = D3DSWAPEFFECT_DISCARD;
params.hDeviceWindow = hwnd;
/* GST_VIDEO_FORMAT_BGRA */
params.BackBufferFormat = D3DFMT_A8R8G8B8;
hr = d3d9_device->CreateAdditionalSwapChain (&params, &swapchain);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create swapchain");
exit (-1);
}
} else {
/* Check whether we need to re-create swapchain */
hr = swapchain->GetPresentParameters (&params);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get swapchain parameters");
exit (-1);
}
if (params.BackBufferWidth != width || params.BackBufferHeight != height) {
/* Backbuffer will have client area size */
params.BackBufferWidth = 0;
params.BackBufferHeight = 0;
swapchain = nullptr;
hr = d3d9_device->CreateAdditionalSwapChain (&params, &swapchain);
if (FAILED (hr)) {
gst_printerrln ("Couldn't re-create swapchain");
exit (-1);
}
}
}
}
static LRESULT CALLBACK
window_proc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_DESTROY:
{
std::lock_guard<std::mutex> lk (lock);
hwnd = NULL;
if (loop)
g_main_loop_quit (loop);
break;
}
case WM_SIZE:
on_resize ();
break;
default:
break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
static gboolean
bus_msg (GstBus * bus, GstMessage * msg, GstElement * pipeline)
{
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ASYNC_DONE:
/* make window visible when we have something to show */
if (!visible && hwnd) {
ShowWindow (hwnd, SW_SHOW);
visible = TRUE;
}
gst_element_set_state (pipeline, GST_STATE_PLAYING);
break;
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;
}
static gboolean
msg_cb (GIOChannel * source, GIOCondition condition, gpointer data)
{
MSG msg;
if (!PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
return G_SOURCE_CONTINUE;
TranslateMessage (&msg);
DispatchMessage (&msg);
return G_SOURCE_CONTINUE;
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline, *sink;
GstStateChangeReturn sret;
WNDCLASSEX wc = { 0, };
HINSTANCE hinstance = GetModuleHandle (NULL);
GIOChannel *msg_io_channel = NULL;
RECT wr = { 0, 0, 320, 240 };
HRESULT hr;
GOptionEntry options[] = {
{"uri", 0, 0, G_OPTION_ARG_STRING, &uri,
"URI to test (if unspecified, videotestsrc will be used)",
NULL},
{NULL}
};
GOptionContext *option_ctx;
gboolean ret;
GError *error = nullptr;
option_ctx = g_option_context_new ("d3d11videosink shard-texture with d3d9 interop 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, &error);
g_option_context_free (option_ctx);
if (!ret) {
g_printerr ("option parsing failed: %s\n", error->message);
g_clear_error (&error);
exit (1);
}
/* 1) Prepare window */
wc.cbSize = sizeof (WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC) window_proc;
wc.hInstance = hinstance;
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.lpszClassName = TEXT ("GstD3D11VideoSinkSharedTextureD3D9ExExample");
RegisterClassEx (&wc);
AdjustWindowRect (&wr, WS_OVERLAPPEDWINDOW, FALSE);
hwnd = CreateWindowEx (0, wc.lpszClassName,
TEXT ("GstD3D11VideoSinkSharedTextureD3D9ExExample"),
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
wr.right - wr.left, wr.bottom - wr.top, (HWND) NULL, (HMENU) NULL,
hinstance, NULL);
/* 2) Prepare D3D11 device */
hr = prepare_d3d11_device (&device, &context, &factory);
if (FAILED (hr)) {
gst_printerrln ("D3D11 device is unavailable");
return -1;
}
/* 3) Prepare D3D9EX device */
Direct3DCreate9Ex (D3D_SDK_VERSION, &d3d9_handle);
if (!d3d9_handle) {
gst_printerrln ("D3D9 handle is unavailable");
return -1;
}
D3DPRESENT_PARAMETERS params = { 0,};
params.Windowed = TRUE;
params.SwapEffect = D3DSWAPEFFECT_DISCARD;
params.hDeviceWindow = hwnd;
params.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;
hr = d3d9_handle->CreateDeviceEx (D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd,
D3DCREATE_HARDWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED | D3DCREATE_FPU_PRESERVE,
&params, nullptr, &d3d9_device);
if (FAILED (hr)) {
gst_printerrln ("D3d9 deice is unavailable");
return -1;
}
/* 4) Create shared texture */
/* Texture size doesn't need to be identical to that of backbuffer */
hr = prepare_shared_texture (device.Get(), 1280, 720,
DXGI_FORMAT_B8G8R8A8_UNORM,
/* NOTE: D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX is incompatible with
* d3d9. User should use D3D11_RESOURCE_MISC_SHARED in case of d3d9 */
D3D11_RESOURCE_MISC_SHARED,
&shared_texture, nullptr, nullptr, &shared_handle);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create texture to share with d3d11videosink");
return -1;
}
hr = d3d9_device->CreateTexture (1280, 720, 1, D3DUSAGE_RENDERTARGET,
D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &shared_d3d9_texture, &shared_handle);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create shared d3d9 texture");
return -1;
}
hr = shared_d3d9_texture->GetSurfaceLevel (0, &d3d9_surface);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get surface from shared d3d9 texture");
return -1;
}
/* Call initial resize to prepare swapchain */
on_resize();
loop = g_main_loop_new (NULL, FALSE);
msg_io_channel = g_io_channel_win32_new_messages ((gsize) hwnd);
g_io_add_watch (msg_io_channel, G_IO_IN, msg_cb, NULL);
/* Enable drawing on our texture and add signal handler */
sink = gst_element_factory_make ("d3d11videosink", NULL);
g_object_set (sink, "draw-on-shared-texture", TRUE, nullptr);
g_signal_connect (sink, "begin-draw", G_CALLBACK (on_begin_draw), sink);
if (uri) {
pipeline = gst_element_factory_make ("playbin", nullptr);
g_object_set (pipeline, "uri", uri, "video-sink", sink, nullptr);
} else {
GstElement *src = gst_element_factory_make ("videotestsrc", nullptr);
pipeline = gst_pipeline_new ("d3d11videosink-pipeline");
gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
gst_element_link (src, sink);
}
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), (GstBusFunc) bus_msg,
pipeline);
sret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
if (sret == GST_STATE_CHANGE_FAILURE) {
g_printerr ("Pipeline doesn't want to pause\n");
} else {
g_main_loop_run (loop);
gst_element_set_state (pipeline, GST_STATE_NULL);
}
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
if (hwnd)
DestroyWindow (hwnd);
gst_object_unref (pipeline);
if (msg_io_channel)
g_io_channel_unref (msg_io_channel);
g_main_loop_unref (loop);
gst_deinit ();
g_free (uri);
return 0;
}

View file

@ -0,0 +1,424 @@
/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "d3d11device.h"
#include <wrl.h>
#include <mutex>
using namespace Microsoft::WRL;
static gboolean use_keyed_mutex = FALSE;
static gboolean use_nt_handle = FALSE;
static gchar *texture_foramt = nullptr;
static gchar *uri = nullptr;
static GMainLoop *loop = nullptr;
static gboolean visible = FALSE;
static HWND hwnd = nullptr;
std::mutex lock;
/* Device handles */
ComPtr<ID3D11Device> device;
ComPtr<ID3D11DeviceContext> context;
ComPtr<IDXGIFactory2> factory;
/* SwapChain resources */
ComPtr<IDXGISwapChain1> swapchain;
ComPtr<ID3D11RenderTargetView> rtv;
/* Shard texture resources */
ComPtr<ID3D11Texture2D> shared_texture;
ComPtr<ID3D11ShaderResourceView> srv;
ComPtr<IDXGIKeyedMutex> keyed_mutex;
HANDLE shared_handle = nullptr;
UINT misc_flags = 0;
static void
on_begin_draw (GstElement * videosink, gpointer user_data)
{
std::lock_guard<std::mutex> lk (lock);
GstElement *sink = GST_ELEMENT (user_data);
gboolean ret = TRUE;
HRESULT hr;
/* Windows was destroyed, nothing to draw */
if (!hwnd)
return;
if (!shared_handle) {
gst_printerrln ("Shared handle wasn't configured");
exit (-1);
}
g_signal_emit_by_name (sink,
"draw", shared_handle, misc_flags, 0, 0, &ret);
if (!ret) {
gst_printerrln ("Failed to draw on shared handle");
if (loop)
g_main_loop_quit (loop);
return;
}
/* Acquire sync */
if (keyed_mutex) {
hr = keyed_mutex->AcquireSync (0, INFINITE);
if (FAILED (hr)) {
gst_printerrln ("Failed to acquire sync");
exit (-1);
}
}
ID3D11RenderTargetView *render_target_view = rtv.Get();
context->OMSetRenderTargets (1, &render_target_view, nullptr);
ID3D11ShaderResourceView *shader_resource = srv.Get();
context->PSSetShaderResources (0, 1, &shader_resource);
context->DrawIndexed (6, 0, 0);
if (keyed_mutex)
keyed_mutex->ReleaseSync (0);
swapchain->Present (0, 0);
}
static void
on_resize (void)
{
std::lock_guard<std::mutex> lk (lock);
ComPtr<ID3D11Texture2D> backbuffer;
rtv = nullptr;
HRESULT hr = swapchain->ResizeBuffers (0,
/* Specify zero width/height to use the size of current client area */
0, 0,
/* Reuse configured format */
DXGI_FORMAT_UNKNOWN,
0);
if (FAILED (hr)) {
gst_printerrln ("Couldn't resize swapchain");
exit(-1);
}
hr = swapchain->GetBuffer (0, IID_PPV_ARGS (&backbuffer));
if (FAILED (hr)) {
gst_printerrln ("Couldn't get backbuffer from swapchain");
exit(-1);
}
hr = device->CreateRenderTargetView (backbuffer.Get(), nullptr, &rtv);
if (FAILED (hr)) {
gst_printerrln ("Couldn't get ID3D11RenderTargetView from backbuffer");
exit(-1);
}
D3D11_TEXTURE2D_DESC desc;
backbuffer->GetDesc(&desc);
D3D11_VIEWPORT viewport;
viewport.TopLeftX = 0;
viewport.TopLeftY = 0;
viewport.Width = desc.Width;
viewport.Height = desc.Height;
viewport.MinDepth = 0.0f;
viewport.MaxDepth = 1.0f;
context->RSSetViewports (1, &viewport);
}
static LRESULT CALLBACK
window_proc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_DESTROY:
{
std::lock_guard<std::mutex> lk (lock);
hwnd = NULL;
if (loop)
g_main_loop_quit (loop);
break;
}
case WM_SIZE:
on_resize ();
break;
default:
break;
}
return DefWindowProc (hWnd, message, wParam, lParam);
}
static gboolean
bus_msg (GstBus * bus, GstMessage * msg, GstElement * pipeline)
{
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ASYNC_DONE:
/* make window visible when we have something to show */
if (!visible && hwnd) {
ShowWindow (hwnd, SW_SHOW);
visible = TRUE;
}
gst_element_set_state (pipeline, GST_STATE_PLAYING);
break;
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;
}
static gboolean
msg_cb (GIOChannel * source, GIOCondition condition, gpointer data)
{
MSG msg;
if (!PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
return G_SOURCE_CONTINUE;
TranslateMessage (&msg);
DispatchMessage (&msg);
return G_SOURCE_CONTINUE;
}
gint
main (gint argc, gchar ** argv)
{
GstElement *pipeline, *sink;
GstStateChangeReturn sret;
WNDCLASSEX wc = { 0, };
HINSTANCE hinstance = GetModuleHandle (NULL);
GIOChannel *msg_io_channel = NULL;
RECT wr = { 0, 0, 320, 240 };
ComPtr<ID3D11SamplerState> sampler;
ComPtr<ID3D11PixelShader> ps;
ComPtr<ID3D11VertexShader> vs;
ComPtr<ID3D11InputLayout> layout;
ComPtr<ID3D11Buffer> vertex;
ComPtr<ID3D11Buffer> index;
HRESULT hr;
GOptionEntry options[] = {
{"use-keyed-mutex", 0, 0, G_OPTION_ARG_NONE, &use_keyed_mutex,
"Allocate shared texture with D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX flag",
NULL},
{"use-nt-handle", 0, 0, G_OPTION_ARG_NONE, &use_nt_handle,
"Allocate shared texture with D3D11_RESOURCE_MISC_SHARED_NTHANDLE flag",
NULL},
{"texture-format", 0, 0, G_OPTION_ARG_STRING, &texture_foramt,
"texture format to test, supported arguments are { BGRA, RGBA, RGB10A2_LE }",
NULL},
{"uri", 0, 0, G_OPTION_ARG_STRING, &uri,
"URI to test (if unspecified, videotestsrc will be used)",
NULL},
{NULL}
};
GOptionContext *option_ctx;
gboolean ret;
GError *error = nullptr;
DXGI_FORMAT format = DXGI_FORMAT_B8G8R8A8_UNORM;
option_ctx = g_option_context_new ("d3d11videosink shard-texture 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, &error);
g_option_context_free (option_ctx);
if (!ret) {
g_printerr ("option parsing failed: %s\n", error->message);
g_clear_error (&error);
exit (1);
}
if (g_strcmp0 (texture_foramt, "RGBA") == 0) {
gst_println ("Use DXGI_FORMAT_R8G8B8A8_UNORM (RGBA) format");
format = DXGI_FORMAT_R8G8B8A8_UNORM;
} else if (g_strcmp0 (texture_foramt, "RGB10A2_LE") == 0) {
gst_println ("Use DXGI_FORMAT_R10G10B10A2_UNORM (RGB10A2_LE) format");
format = DXGI_FORMAT_R10G10B10A2_UNORM;
} else {
gst_println ("Use DXGI_FORMAT_B8G8R8A8_UNORM format");
format = DXGI_FORMAT_B8G8R8A8_UNORM;
}
/* NT handle needs to be used with keyed mutex */
if (use_nt_handle) {
misc_flags = D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX | D3D11_RESOURCE_MISC_SHARED_NTHANDLE;
} else if (use_keyed_mutex) {
misc_flags = D3D11_RESOURCE_MISC_SHARED_KEYEDMUTEX;
} else {
misc_flags = D3D11_RESOURCE_MISC_SHARED;
}
gst_println ("Use keyed-mutex: %d, use_nt_handle: %d", use_keyed_mutex,
use_nt_handle);
/* 1) Prepare window */
wc.cbSize = sizeof (WNDCLASSEX);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC) window_proc;
wc.hInstance = hinstance;
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.lpszClassName = TEXT ("GstD3D11VideoSinkSharedTextureExExample");
RegisterClassEx (&wc);
AdjustWindowRect (&wr, WS_OVERLAPPEDWINDOW, FALSE);
hwnd = CreateWindowEx (0, wc.lpszClassName,
TEXT ("GstD3D11VideoSinkSharedTextureExExample"),
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
wr.right - wr.left, wr.bottom - wr.top, (HWND) NULL, (HMENU) NULL,
hinstance, NULL);
/* 2) Prepare D3D11 device */
hr = prepare_d3d11_device (&device, &context, &factory);
if (FAILED (hr)) {
gst_printerrln ("D3D11 device is unavailable");
return -1;
}
hr = prepare_shader (device.Get(), context.Get(), &sampler,
&ps, &vs, &layout, &vertex, &index);
if (FAILED (hr)) {
gst_printerrln ("Couldn't setup shader");
return -1;
}
/* 3) Prepare SwapChain */
DXGI_SWAP_CHAIN_DESC1 desc = { 0, };
desc.Width = 0;
desc.Height = 0;
desc.Format = format;
desc.Stereo = FALSE;
desc.SampleDesc.Count = 1;
desc.SampleDesc.Quality = 0;
desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
desc.BufferCount = 2;
desc.Scaling = DXGI_SCALING_NONE;
desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
desc.AlphaMode = DXGI_ALPHA_MODE_UNSPECIFIED;
hr = factory->CreateSwapChainForHwnd (device.Get(), hwnd, &desc,
nullptr, nullptr, &swapchain);
if (FAILED (hr)) {
gst_printerrln ("IDXGISwapChain1 is unavailable");
return -1;
}
/* 4) Create shared texture */
/* Texture size doesn't need to be identical to that of backbuffer */
hr = prepare_shared_texture (device.Get(), 1280, 720,
format, misc_flags, &shared_texture, &srv, &keyed_mutex, &shared_handle);
if (FAILED (hr)) {
gst_printerrln ("Couldn't create texture to share with d3d11videosink");
return -1;
}
context->IASetPrimitiveTopology (D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
context->IASetInputLayout (layout.Get());
ID3D11Buffer *buf = vertex.Get();
UINT offsets = 0;
UINT stride = sizeof(VertexData);
context->IASetVertexBuffers (0, 1, &buf, &stride, &offsets);
context->IASetIndexBuffer (index.Get(), DXGI_FORMAT_R16_UINT, 0);
ID3D11SamplerState *sampler_state = sampler.Get();
context->PSSetSamplers (0, 1, &sampler_state);
context->VSSetShader (vs.Get(), nullptr, 0);
context->PSSetShader (ps.Get(), nullptr, 0);
/* Call initial resize to prepare resources */
on_resize();
loop = g_main_loop_new (NULL, FALSE);
msg_io_channel = g_io_channel_win32_new_messages ((gsize) hwnd);
g_io_add_watch (msg_io_channel, G_IO_IN, msg_cb, NULL);
/* Enable drawing on our texture and add signal handler */
sink = gst_element_factory_make ("d3d11videosink", NULL);
g_object_set (sink, "draw-on-shared-texture", TRUE, nullptr);
g_signal_connect (sink, "begin-draw", G_CALLBACK (on_begin_draw), sink);
if (uri) {
pipeline = gst_element_factory_make ("playbin", nullptr);
g_object_set (pipeline, "uri", uri, "video-sink", sink, nullptr);
} else {
GstElement *src = gst_element_factory_make ("videotestsrc", nullptr);
pipeline = gst_pipeline_new ("d3d11videosink-pipeline");
gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
gst_element_link (src, sink);
}
gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), (GstBusFunc) bus_msg,
pipeline);
sret = gst_element_set_state (pipeline, GST_STATE_PAUSED);
if (sret == GST_STATE_CHANGE_FAILURE) {
g_printerr ("Pipeline doesn't want to pause\n");
} else {
g_main_loop_run (loop);
gst_element_set_state (pipeline, GST_STATE_NULL);
}
gst_bus_remove_watch (GST_ELEMENT_BUS (pipeline));
if (hwnd)
DestroyWindow (hwnd);
gst_object_unref (pipeline);
if (msg_io_channel)
g_io_channel_unref (msg_io_channel);
g_main_loop_unref (loop);
gst_deinit ();
g_free (texture_foramt);
g_free (uri);
/* NT handle should be explicitly closed to avoid leak */
if (use_nt_handle)
CloseHandle (shared_handle);
return 0;
}

View file

@ -6,4 +6,34 @@ if host_system == 'windows'
dependencies: [gst_dep, gstbase_dep, gstvideo_dep],
install: false,
)
d3d11_lib = cc.find_library('d3d11', required : false)
dxgi_lib = cc.find_library('dxgi', required : false)
d3dcompiler_lib = cc.find_library('d3dcompiler', required: false)
have_d3d11_h = cc.has_header('d3d11.h')
have_dxgi_h = cc.has_header('dxgi1_2.h')
have_d3d11compiler_h = cc.has_header('d3dcompiler.h')
d3d9_dep = cc.find_library('d3d9', required : false)
have_d3d9_h = cc.has_header('d3d9.h')
if d3d11_lib.found() and dxgi_lib.found() and d3dcompiler_lib.found() and have_d3d11_h and have_dxgi_h and have_d3d11compiler_h
executable('d3d11videosink-shared-texture',
['d3d11videosink-shared-texture.cpp', 'd3d11device.cpp'],
c_args : gst_plugins_bad_args,
include_directories : [configinc, libsinc],
dependencies: [gst_dep, gstbase_dep, gstvideo_dep, d3d11_lib, dxgi_lib, d3dcompiler_lib],
install: false,
)
if d3d_dep.found() and have_d3d9_h
executable('d3d11videosink-shared-texture-d3d9ex',
['d3d11videosink-shared-texture-d3d9ex.cpp', 'd3d11device.cpp'],
c_args : gst_plugins_bad_args,
include_directories : [configinc, libsinc],
dependencies: [gst_dep, gstbase_dep, gstvideo_dep, d3d11_lib, dxgi_lib, d3dcompiler_lib, d3d9_dep],
install: false,
)
endif
endif
endif