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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qffmpeghwaccel_d3d11_p.h"
#include <qvideoframeformat.h>
#include "qffmpegvideobuffer_p.h"
#include <private/qvideotexturehelper_p.h>
#include <private/qwindowsiupointer_p.h>
#include <private/qrhi_p.h>
#include <private/qrhid3d11_p.h>
#include <qopenglfunctions.h>
#include <qdebug.h>
#include <qloggingcategory.h>
#include <libavutil/hwcontext_d3d11va.h>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(qLcMediaFFmpegHWAccel, "qt.multimedia.hwaccel")
namespace QFFmpeg {
class D3D11TextureSet : public TextureSet
{
public:
D3D11TextureSet(QWindowsIUPointer<ID3D11Texture2D> &&tex)
: m_tex(tex)
{}
qint64 textureHandle(int /*plane*/) override
{
return qint64(m_tex.get());
}
private:
QWindowsIUPointer<ID3D11Texture2D> m_tex;
};
D3D11TextureConverter::D3D11TextureConverter(QRhi *rhi)
: TextureConverterBackend(rhi)
{
}
static QWindowsIUPointer<ID3D11Texture2D> getSharedTextureForDevice(ID3D11Device *dev, ID3D11Texture2D *tex)
{
QWindowsIUPointer<IDXGIResource> dxgiResource;
HRESULT hr = tex->QueryInterface(__uuidof(IDXGIResource), reinterpret_cast<void **>(dxgiResource.address()));
if (FAILED(hr)) {
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to obtain resource handle from FFMpeg texture" << hr;
return {};
}
HANDLE shared = nullptr;
hr = dxgiResource->GetSharedHandle(&shared);
if (FAILED(hr)) {
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to obtain shared handle for FFmpeg texture" << hr;
return {};
}
QWindowsIUPointer<ID3D11Texture2D> sharedTex;
hr = dev->OpenSharedResource(shared, __uuidof(ID3D11Texture2D), reinterpret_cast<void **>(sharedTex.address()));
if (FAILED(hr))
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to share FFmpeg texture" << hr;
return sharedTex;
}
static QWindowsIUPointer<ID3D11Texture2D> copyTextureFromArray(ID3D11Device *dev, ID3D11Texture2D *array, int index)
{
D3D11_TEXTURE2D_DESC arrayDesc = {};
array->GetDesc(&arrayDesc);
D3D11_TEXTURE2D_DESC texDesc = {};
texDesc.Width = arrayDesc.Width;
texDesc.Height = arrayDesc.Height;
texDesc.Format = arrayDesc.Format;
texDesc.ArraySize = 1;
texDesc.MipLevels = 1;
texDesc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
texDesc.MiscFlags = 0;
texDesc.SampleDesc = { 1, 0};
QWindowsIUPointer<ID3D11Texture2D> texCopy;
HRESULT hr = dev->CreateTexture2D(&texDesc, nullptr, texCopy.address());
if (FAILED(hr)) {
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to create texture" << hr;
return {};
}
QWindowsIUPointer<ID3D11DeviceContext> ctx;
dev->GetImmediateContext(ctx.address());
ctx->CopySubresourceRegion(texCopy.get(), 0, 0, 0, 0, array, index, nullptr);
return texCopy;
}
TextureSet *D3D11TextureConverter::getTextures(AVFrame *frame)
{
if (!frame || !frame->hw_frames_ctx || frame->format != AV_PIX_FMT_D3D11)
return nullptr;
auto *fCtx = (AVHWFramesContext *)frame->hw_frames_ctx->data;
auto *ctx = fCtx->device_ctx;
if (!ctx || ctx->type != AV_HWDEVICE_TYPE_D3D11VA)
return nullptr;
auto nh = static_cast<const QRhiD3D11NativeHandles *>(rhi->nativeHandles());
if (!nh)
return nullptr;
auto ffmpegTex = (ID3D11Texture2D *)frame->data[0];
int index = (intptr_t)frame->data[1];
if (rhi->backend() == QRhi::D3D11) {
auto dev = reinterpret_cast<ID3D11Device *>(nh->dev);
if (!dev)
return nullptr;
auto sharedTex = getSharedTextureForDevice(dev, ffmpegTex);
if (sharedTex) {
auto tex = copyTextureFromArray(dev, sharedTex.get(), index);
if (tex) {
return new D3D11TextureSet(std::move(tex));
}
}
}
return nullptr;
}
void D3D11TextureConverter::SetupDecoderTextures(AVCodecContext *s)
{
int ret = avcodec_get_hw_frames_parameters(s,
s->hw_device_ctx,
AV_PIX_FMT_D3D11,
&s->hw_frames_ctx);
if (ret < 0) {
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to allocate HW frames context" << ret;
return;
}
auto *frames_ctx = (AVHWFramesContext *)s->hw_frames_ctx->data;
auto *hwctx = (AVD3D11VAFramesContext *)frames_ctx->hwctx;
hwctx->MiscFlags = D3D11_RESOURCE_MISC_SHARED;
hwctx->BindFlags = D3D11_BIND_DECODER | D3D11_BIND_SHADER_RESOURCE;
ret = av_hwframe_ctx_init(s->hw_frames_ctx);
if (ret < 0) {
qCDebug(qLcMediaFFmpegHWAccel) << "Failed to initialize HW frames context" << ret;
av_buffer_unref(&s->hw_frames_ctx);
}
}
}
QT_END_NAMESPACE
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