mirror of https://github.com/mpv-player/mpv
128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <pthread.h>
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#include "config.h"
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#include <libavcodec/avcodec.h>
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#include <libavutil/hwcontext.h>
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#include <libavutil/hwcontext_d3d11va.h>
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#if HAVE_D3D9_HWACCEL
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#include <libavutil/hwcontext_dxva2.h>
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#endif
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#include "lavc.h"
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#include "common/common.h"
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#include "common/av_common.h"
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#include "video/fmt-conversion.h"
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#include "video/mp_image.h"
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#include "video/mp_image_pool.h"
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#include "osdep/windows_utils.h"
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#include "d3d.h"
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HMODULE d3d11_dll, d3d9_dll, dxva2_dll;
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PFN_D3D11_CREATE_DEVICE d3d11_D3D11CreateDevice;
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static pthread_once_t d3d_load_once = PTHREAD_ONCE_INIT;
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#if !HAVE_UWP
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static void d3d_do_load(void)
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{
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d3d11_dll = LoadLibrary(L"d3d11.dll");
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d3d9_dll = LoadLibrary(L"d3d9.dll");
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dxva2_dll = LoadLibrary(L"dxva2.dll");
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if (d3d11_dll) {
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d3d11_D3D11CreateDevice =
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(void *)GetProcAddress(d3d11_dll, "D3D11CreateDevice");
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}
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}
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#else
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static void d3d_do_load(void)
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{
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d3d11_D3D11CreateDevice = D3D11CreateDevice;
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}
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#endif
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void d3d_load_dlls(void)
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{
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pthread_once(&d3d_load_once, d3d_do_load);
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}
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// Test if Direct3D11 can be used by us. Basically, this prevents trying to use
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// D3D11 on Win7, and then failing somewhere in the process.
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bool d3d11_check_decoding(ID3D11Device *dev)
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{
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HRESULT hr;
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// We assume that NV12 is always supported, if hw decoding is supported at
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// all.
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UINT supported = 0;
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hr = ID3D11Device_CheckFormatSupport(dev, DXGI_FORMAT_NV12, &supported);
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return !FAILED(hr) && (supported & D3D11_BIND_DECODER);
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}
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void d3d_hwframes_refine(struct lavc_ctx *ctx, AVBufferRef *hw_frames_ctx)
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{
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AVHWFramesContext *fctx = (void *)hw_frames_ctx->data;
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if (fctx->format == AV_PIX_FMT_D3D11) {
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AVD3D11VAFramesContext *hwctx = fctx->hwctx;
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// According to hwcontex_d3d11va.h, yuv420p means DXGI_FORMAT_420_OPAQUE,
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// which has no shader support.
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if (fctx->sw_format != AV_PIX_FMT_YUV420P)
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hwctx->BindFlags |= D3D11_BIND_SHADER_RESOURCE;
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}
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}
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AVBufferRef *d3d11_wrap_device_ref(ID3D11Device *device)
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{
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AVBufferRef *device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_D3D11VA);
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if (!device_ref)
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return NULL;
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AVHWDeviceContext *ctx = (void *)device_ref->data;
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AVD3D11VADeviceContext *hwctx = ctx->hwctx;
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ID3D11Device_AddRef(device);
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hwctx->device = device;
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if (av_hwdevice_ctx_init(device_ref) < 0)
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av_buffer_unref(&device_ref);
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return device_ref;
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}
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static void d3d11_complete_image_params(struct mp_image *img)
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{
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AVHWFramesContext *hw_frames = (void *)img->hwctx->data;
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// According to hwcontex_d3d11va.h, this means DXGI_FORMAT_420_OPAQUE.
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img->params.hw_flags = hw_frames->sw_format == AV_PIX_FMT_YUV420P
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? MP_IMAGE_HW_FLAG_OPAQUE : 0;
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}
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const struct hwcontext_fns hwcontext_fns_d3d11 = {
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.av_hwdevice_type = AV_HWDEVICE_TYPE_D3D11VA,
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.complete_image_params = d3d11_complete_image_params,
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};
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