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mpv/video/out/gpu/d3d11_helpers.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <windows.h>
#include <d3d11.h>
#include <dxgi1_2.h>
#include <pthread.h>
#include "common/common.h"
#include "common/msg.h"
#include "osdep/io.h"
#include "osdep/windows_utils.h"
#include "d3d11_helpers.h"
// Windows 8 enum value, not present in mingw-w64 headers
#define DXGI_ADAPTER_FLAG_SOFTWARE (2)
static pthread_once_t d3d11_once = PTHREAD_ONCE_INIT;
static PFN_D3D11_CREATE_DEVICE pD3D11CreateDevice = NULL;
static void d3d11_load(void)
{
HMODULE d3d11 = LoadLibraryW(L"d3d11.dll");
if (!d3d11)
return;
pD3D11CreateDevice = (PFN_D3D11_CREATE_DEVICE)
GetProcAddress(d3d11, "D3D11CreateDevice");
}
// Get a const array of D3D_FEATURE_LEVELs from max_fl to min_fl (inclusive)
static int get_feature_levels(int max_fl, int min_fl,
const D3D_FEATURE_LEVEL **out)
{
static const D3D_FEATURE_LEVEL levels[] = {
D3D_FEATURE_LEVEL_12_1,
D3D_FEATURE_LEVEL_12_0,
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,
};
static const int levels_len = MP_ARRAY_SIZE(levels);
int start = 0;
for (; start < levels_len; start++) {
if (levels[start] <= max_fl)
break;
}
int len = 0;
for (; start + len < levels_len; len++) {
if (levels[start + len] < min_fl)
break;
}
*out = &levels[start];
return len;
}
static HRESULT create_device(struct mp_log *log, bool warp, bool debug,
int max_fl, int min_fl, ID3D11Device **dev)
{
const D3D_FEATURE_LEVEL *levels;
int levels_len = get_feature_levels(max_fl, min_fl, &levels);
if (!levels_len) {
mp_fatal(log, "No suitable Direct3D feature level found\n");
return E_FAIL;
}
D3D_DRIVER_TYPE type = warp ? D3D_DRIVER_TYPE_WARP
: D3D_DRIVER_TYPE_HARDWARE;
UINT flags = debug ? D3D11_CREATE_DEVICE_DEBUG : 0;
return pD3D11CreateDevice(NULL, type, NULL, flags, levels, levels_len,
D3D11_SDK_VERSION, dev, NULL, NULL);
}
// Create a Direct3D 11 device for rendering and presentation. This is meant to
// reduce boilerplate in backends that D3D11, while also making sure they share
// the same device creation logic and log the same information.
bool mp_d3d11_create_present_device(struct mp_log *log,
struct d3d11_device_opts *opts,
ID3D11Device **dev_out)
{
bool warp = opts->force_warp;
int max_fl = opts->max_feature_level;
int min_fl = opts->min_feature_level;
ID3D11Device *dev = NULL;
IDXGIDevice1 *dxgi_dev = NULL;
IDXGIAdapter1 *adapter = NULL;
bool success = false;
HRESULT hr;
pthread_once(&d3d11_once, d3d11_load);
if (!pD3D11CreateDevice) {
mp_fatal(log, "Failed to load d3d11.dll\n");
goto done;
}
// Return here to retry creating the device
do {
// Use these default feature levels if they are not set
max_fl = max_fl ? max_fl : D3D_FEATURE_LEVEL_11_0;
min_fl = min_fl ? min_fl : D3D_FEATURE_LEVEL_9_1;
hr = create_device(log, warp, opts->debug, max_fl, min_fl, &dev);
if (SUCCEEDED(hr))
break;
// Trying to create a D3D_FEATURE_LEVEL_12_0 device on Windows 8.1 or
// below will not succeed. Try an 11_1 device.
if (max_fl >= D3D_FEATURE_LEVEL_12_0 &&
min_fl <= D3D_FEATURE_LEVEL_11_1)
{
mp_dbg(log, "Failed to create 12_0+ device, trying 11_1\n");
max_fl = D3D_FEATURE_LEVEL_11_1;
continue;
}
// Trying to create a D3D_FEATURE_LEVEL_11_1 device on Windows 7
// without the platform update will not succeed. Try an 11_0 device.
if (max_fl >= D3D_FEATURE_LEVEL_11_1 &&
min_fl <= D3D_FEATURE_LEVEL_11_0)
{
mp_dbg(log, "Failed to create 11_1+ device, trying 11_0\n");
max_fl = D3D_FEATURE_LEVEL_11_0;
continue;
}
// Retry with WARP if allowed
if (!warp && opts->allow_warp) {
mp_dbg(log, "Failed to create hardware device, trying WARP\n");
warp = true;
max_fl = opts->max_feature_level;
min_fl = opts->min_feature_level;
continue;
}
mp_fatal(log, "Failed to create Direct3D 11 device: %s\n",
mp_HRESULT_to_str(hr));
goto done;
} while (true);
hr = ID3D11Device_QueryInterface(dev, &IID_IDXGIDevice1, (void**)&dxgi_dev);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get DXGI device\n");
goto done;
}
hr = IDXGIDevice1_GetParent(dxgi_dev, &IID_IDXGIAdapter1, (void**)&adapter);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get DXGI adapter\n");
goto done;
}
IDXGIDevice1_SetMaximumFrameLatency(dxgi_dev, opts->max_frame_latency);
DXGI_ADAPTER_DESC1 desc;
hr = IDXGIAdapter1_GetDesc1(adapter, &desc);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get adapter description\n");
goto done;
}
D3D_FEATURE_LEVEL selected_level = ID3D11Device_GetFeatureLevel(dev);
mp_verbose(log, "Using Direct3D 11 feature level %u_%u\n",
((unsigned)selected_level) >> 12,
(((unsigned)selected_level) >> 8) & 0xf);
char *dev_name = mp_to_utf8(NULL, desc.Description);
mp_verbose(log, "Device: %s\n"
"VendorId: 0x%04d\n"
"DeviceId: 0x%04d\n"
"LUID: %08lx%08lx\n",
dev_name, desc.VendorId, desc.DeviceId,
desc.AdapterLuid.HighPart, desc.AdapterLuid.LowPart);
talloc_free(dev_name);
if (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE)
warp = true;
// If the primary display adapter is a software adapter, the
// DXGI_ADAPTER_FLAG_SOFTWARE flag won't be set, but the device IDs should
// still match the Microsoft Basic Render Driver
if (desc.VendorId == 0x1414 && desc.DeviceId == 0x8c)
warp = true;
if (warp) {
mp_msg(log, opts->force_warp ? MSGL_V : MSGL_WARN,
"Using a software adapter\n");
}
*dev_out = dev;
dev = NULL;
success = true;
done:
SAFE_RELEASE(adapter);
SAFE_RELEASE(dxgi_dev);
SAFE_RELEASE(dev);
return success;
}
static HRESULT create_swapchain_1_2(ID3D11Device *dev, IDXGIFactory2 *factory,
struct mp_log *log,
struct d3d11_swapchain_opts *opts,
bool flip, DXGI_FORMAT format,
IDXGISwapChain **swapchain_out)
{
IDXGISwapChain *swapchain = NULL;
IDXGISwapChain1 *swapchain1 = NULL;
HRESULT hr;
DXGI_SWAP_CHAIN_DESC1 desc = {
.Width = opts->width ? opts->width : 1,
.Height = opts->height ? opts->height : 1,
.Format = format,
.SampleDesc = { .Count = 1 },
.BufferUsage = opts->usage,
};
if (flip) {
desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
desc.BufferCount = opts->length;
} else {
desc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
desc.BufferCount = 1;
}
hr = IDXGIFactory2_CreateSwapChainForHwnd(factory, (IUnknown*)dev,
opts->window, &desc, NULL, NULL, &swapchain1);
if (FAILED(hr))
goto done;
hr = IDXGISwapChain1_QueryInterface(swapchain1, &IID_IDXGISwapChain,
(void**)&swapchain);
if (FAILED(hr))
goto done;
*swapchain_out = swapchain;
swapchain = NULL;
done:
SAFE_RELEASE(swapchain1);
SAFE_RELEASE(swapchain);
return hr;
}
static HRESULT create_swapchain_1_1(ID3D11Device *dev, IDXGIFactory1 *factory,
struct mp_log *log,
struct d3d11_swapchain_opts *opts,
DXGI_FORMAT format,
IDXGISwapChain **swapchain_out)
{
DXGI_SWAP_CHAIN_DESC desc = {
.BufferDesc = {
.Width = opts->width ? opts->width : 1,
.Height = opts->height ? opts->height : 1,
.Format = format,
},
.SampleDesc = { .Count = 1 },
.BufferUsage = opts->usage,
.BufferCount = 1,
.OutputWindow = opts->window,
.Windowed = TRUE,
.SwapEffect = DXGI_SWAP_EFFECT_DISCARD,
};
return IDXGIFactory1_CreateSwapChain(factory, (IUnknown*)dev, &desc,
swapchain_out);
}
// Create a Direct3D 11 swapchain
bool mp_d3d11_create_swapchain(ID3D11Device *dev, struct mp_log *log,
struct d3d11_swapchain_opts *opts,
IDXGISwapChain **swapchain_out)
{
IDXGIDevice1 *dxgi_dev = NULL;
IDXGIAdapter1 *adapter = NULL;
IDXGIFactory1 *factory = NULL;
IDXGIFactory2 *factory2 = NULL;
IDXGISwapChain *swapchain = NULL;
bool success = false;
HRESULT hr;
hr = ID3D11Device_QueryInterface(dev, &IID_IDXGIDevice1, (void**)&dxgi_dev);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get DXGI device\n");
goto done;
}
hr = IDXGIDevice1_GetParent(dxgi_dev, &IID_IDXGIAdapter1, (void**)&adapter);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get DXGI adapter\n");
goto done;
}
hr = IDXGIAdapter1_GetParent(adapter, &IID_IDXGIFactory1, (void**)&factory);
if (FAILED(hr)) {
mp_fatal(log, "Failed to get DXGI factory\n");
goto done;
}
hr = IDXGIFactory1_QueryInterface(factory, &IID_IDXGIFactory2,
(void**)&factory2);
if (FAILED(hr))
factory2 = NULL;
// Try B8G8R8A8_UNORM first, since at least in Windows 8, it's always the
// format of the desktop image
static const DXGI_FORMAT formats[] = {
DXGI_FORMAT_B8G8R8A8_UNORM,
DXGI_FORMAT_R8G8B8A8_UNORM,
};
static const int formats_len = MP_ARRAY_SIZE(formats);
bool flip = factory2 && opts->flip;
// Return here to retry creating the swapchain
do {
for (int i = 0; i < formats_len; i++) {
if (factory2) {
// Create a DXGI 1.2+ (Windows 8+) swap chain if possible
hr = create_swapchain_1_2(dev, factory2, log, opts, flip,
formats[i], &swapchain);
} else {
// Fall back to DXGI 1.1 (Windows 7)
hr = create_swapchain_1_1(dev, factory, log, opts, formats[i],
&swapchain);
}
if (SUCCEEDED(hr))
break;
}
if (SUCCEEDED(hr))
break;
if (flip) {
mp_dbg(log, "Failed to create flip-model swapchain, trying bitblt\n");
flip = false;
continue;
}
mp_fatal(log, "Failed to create swapchain: %s\n", mp_HRESULT_to_str(hr));
goto done;
} while (true);
// Prevent DXGI from making changes to the VO window, otherwise it will
// hook the Alt+Enter keystroke and make it trigger an ugly transition to
// exclusive fullscreen mode instead of running the user-set command.
IDXGIFactory_MakeWindowAssociation(factory, opts->window,
DXGI_MWA_NO_WINDOW_CHANGES | DXGI_MWA_NO_ALT_ENTER |
DXGI_MWA_NO_PRINT_SCREEN);
if (factory2) {
mp_verbose(log, "Using DXGI 1.2+\n");
} else {
mp_verbose(log, "Using DXGI 1.1\n");
}
DXGI_SWAP_CHAIN_DESC scd = {0};
IDXGISwapChain_GetDesc(swapchain, &scd);
if (scd.SwapEffect == DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL) {
mp_verbose(log, "Using flip-model presentation\n");
} else {
mp_verbose(log, "Using bitblt-model presentation\n");
}
*swapchain_out = swapchain;
swapchain = NULL;
success = true;
done:
SAFE_RELEASE(swapchain);
SAFE_RELEASE(factory2);
SAFE_RELEASE(factory);
SAFE_RELEASE(adapter);
SAFE_RELEASE(dxgi_dev);
return success;
}
struct mp_image *mp_d3d11_screenshot(IDXGISwapChain *swapchain)
{
ID3D11Device *dev = NULL;
ID3D11DeviceContext *ctx = NULL;
ID3D11Texture2D *frontbuffer = NULL;
ID3D11Texture2D *staging = NULL;
struct mp_image *img = NULL;
HRESULT hr;
// Validate the swap chain. This screenshot method will only work on DXGI
// 1.2+ flip/sequential swap chains. It's probably not possible at all with
// discard swap chains, since by definition, the backbuffer contents is
// discarded on Present().
DXGI_SWAP_CHAIN_DESC scd;
hr = IDXGISwapChain_GetDesc(swapchain, &scd);
if (FAILED(hr))
goto done;
if (scd.SwapEffect != DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL)
goto done;
// Get the last buffer that was presented with Present(). This should be
// the n-1th buffer for a swap chain of length n.
hr = IDXGISwapChain_GetBuffer(swapchain, scd.BufferCount - 1,
&IID_ID3D11Texture2D, (void**)&frontbuffer);
if (FAILED(hr))
goto done;
ID3D11Texture2D_GetDevice(frontbuffer, &dev);
ID3D11Device_GetImmediateContext(dev, &ctx);
D3D11_TEXTURE2D_DESC td;
ID3D11Texture2D_GetDesc(frontbuffer, &td);
if (td.SampleDesc.Count > 1)
goto done;
// Validate the backbuffer format and convert to an mpv IMGFMT
enum mp_imgfmt fmt;
switch (td.Format) {
case DXGI_FORMAT_B8G8R8A8_UNORM: fmt = IMGFMT_BGR0; break;
case DXGI_FORMAT_R8G8B8A8_UNORM: fmt = IMGFMT_RGB0; break;
default:
goto done;
}
// Create a staging texture based on the frontbuffer with CPU access
td.BindFlags = 0;
td.MiscFlags = 0;
td.CPUAccessFlags = D3D11_CPU_ACCESS_READ;
td.Usage = D3D11_USAGE_STAGING;
hr = ID3D11Device_CreateTexture2D(dev, &td, 0, &staging);
if (FAILED(hr))
goto done;
ID3D11DeviceContext_CopyResource(ctx, (ID3D11Resource*)staging,
(ID3D11Resource*)frontbuffer);
// Attempt to map the staging texture to CPU-accessible memory
D3D11_MAPPED_SUBRESOURCE lock;
hr = ID3D11DeviceContext_Map(ctx, (ID3D11Resource*)staging, 0,
D3D11_MAP_READ, 0, &lock);
if (FAILED(hr))
goto done;
img = mp_image_alloc(fmt, td.Width, td.Height);
if (!img)
return NULL;
for (int i = 0; i < td.Height; i++) {
memcpy(img->planes[0] + img->stride[0] * i,
(char*)lock.pData + lock.RowPitch * i, td.Width * 4);
}
ID3D11DeviceContext_Unmap(ctx, (ID3D11Resource*)staging, 0);
done:
SAFE_RELEASE(frontbuffer);
SAFE_RELEASE(staging);
SAFE_RELEASE(ctx);
SAFE_RELEASE(dev);
return img;
}
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