我正在开发一个应用程序，它使用应用程序中的 DXGI 机制捕获帧。
第一次创建 IDXGIOutputDuplication 是正确的。当应用程序更改其显示（例如从全屏到窗口或反之亦然）时，帧获取失败（预期行为），然后我重新创建 IDXGIOutputDuplication 并定期调用 DuplicateOutput 崩溃。
下面创建 D3d11 设备：
D3D_FEATURE_LEVEL FeatureLevels[] =
{
D3D_FEATURE_LEVEL_11_1,
D3D_FEATURE_LEVEL_11_0,
D3D_FEATURE_LEVEL_10_1,
D3D_FEATURE_LEVEL_10_0,
D3D_FEATURE_LEVEL_9_1
};
UINT NumFeatureLevels = ARRAYSIZE( FeatureLevels );
D3D_FEATURE_LEVEL FeatureLevel = D3D_FEATURE_LEVEL_11_1;
D3D11CreateDevice( _pDxgiAdapter, D3D_DRIVER_TYPE_UNKNOWN, nullptr, 0, FeatureLevels, NumFeatureLevels, D3D11_SDK_VERSION, &_pD3D11Device, &FeatureLevel, &_pD3D11DeviceCtx );
_pDxgiAdapter 在设备之前创建。
下面创建 IDXGIOutputDuplication：
int DxgiVideoCapture::open() {
findDxgiAdapter();
if( nullptr != _pDxgiAdapter ) {
// Duplicate output
uint32_t ui32OutputIndex = 0;
HRESULT hr = S_OK;
while( SUCCEEDED( hr ) ) {
IDXGIOutput* pDxgiOutput = nullptr;
hr = _pDxgiAdapter->EnumOutputs( ui32OutputIndex, &pDxgiOutput );
if( SUCCEEDED( hr ) ) {
IDXGIOutput1* pDxgiOutput1 = nullptr;
if( SUCCEEDED ( pDxgiOutput->QueryInterface( __uuidof( IDXGIOutput1 ), ( void** )&pDxgiOutput1 ) ) ) {
uint32_t ui32EnumMode = 0;
uint32_t ui32Flags = 0xffffffff;
}
if( SUCCEEDED ( pDxgiOutput->QueryInterface( __uuidof( IDXGIOutput1 ), ( void** )&_pDxgiOutput1 ) ) ) {
LOGI( "/!\\ Call which crash regularly /!\\" );
HRESULT hrDup = _pDxgiOutput1->DuplicateOutput( _pD3D11Device, &_pOutputDuplication );
if( SUCCEEDED( hrDup ) ) {
LOGI( "Output duplication created." );
} else {
switch( hrDup ) {
case E_INVALIDARG :
{
LOGW( "Invalid device or output already duplicated" );
}
break;
case E_ACCESSDENIED :
{
LOGW( "Access denied" );
}
break;
case DXGI_ERROR_UNSUPPORTED :
{
LOGW( "DXGI_ERROR_UNSUPPORTED" );
}
break;
case DXGI_ERROR_NOT_CURRENTLY_AVAILABLE :
{
LOGW( "DXGI_ERROR_NOT_CURRENTLY_AVAILABLE" );
}
break;
case DXGI_ERROR_SESSION_DISCONNECTED :
{
LOGW( "DXGI_ERROR_NOT_CURRENTLY_AVAILABLE" );
}
break;
default:
{
LOGW( "default" );
}
}
} else {
LOGE( "Unable to retrieve interface creating the ouput duplication" );
}
}
pDxgiOutput->Release();
}
ui32OutputIndex++;
}
return RET_OK;
}
帧采集下方：
int DxgiVideoCapture::captureGameFrame() {
int iRet = RET_ERROR;
ID3D11Texture2D* pCapturedTexture = nullptr;
DXGI_OUTDUPL_FRAME_INFO frameInfo;
ZeroMemory(&frameInfo, sizeof(frameInfo));
HRESULT hr = _pOutputDuplication->AcquireNextFrame( 1000, &frameInfo, &_pDxgiResource );
if( FAILED( hr ) ) {
if( hr == DXGI_ERROR_WAIT_TIMEOUT ) {
LOGW( "Wait for %d ms timed out", 1000);
}
if (hr == DXGI_ERROR_INVALID_CALL) {
LOGW( "Invalid Call, previous frame not released?" );
}
if (hr == DXGI_ERROR_ACCESS_LOST) {
LOGW( "Error Access lost - is it a game end ?" );
}
iRet = RET_RESET_CAPTURE;
return iRet;
}
if( FAILED( hr = _pDxgiResource->QueryInterface( __uuidof( ID3D11Texture2D ), ( void** ) &pCapturedTexture ) ) ) {
LOGW( "unable to retrieve D3D11 texture 0x%x", hr );
return RET_WARNING;
} else {
// Store window of the game
D3D11_TEXTURE2D_DESC d3D11TextureDesc;
pCapturedTexture->GetDesc( &d3D11TextureDesc );
// Compute the zone to extract.
D3D11_BOX srcBox;
memset( &srcBox, 0, sizeof( srcBox ) );
if( _pGameWindow->getLeftPos() > 0 ) {
srcBox.left = _pGameWindow->getLeftPos();
}
if( _pGameWindow->getTopPos() > 0 ) {
srcBox.top = _pGameWindow->getTopPos();
}
srcBox.front = 0;
srcBox.right = _pGameWindow->getLeftPos() + _pGameWindow->getWidth();
if( srcBox.right > _pGameWindow->getMonitorWidth() ) {
srcBox.right = _pGameWindow->getMonitorWidth();
}
if( ( srcBox.right - srcBox.left ) % 2 != 0 ) {
srcBox.right--;
}
srcBox.bottom = _pGameWindow->getTopPos() + _pGameWindow->getHeight();
if( srcBox.bottom > _pGameWindow->getMonitorHeight() ) {
srcBox.bottom = _pGameWindow->getMonitorHeight();
}
if( ( srcBox.bottom - srcBox.top ) % 2 != 0 ) {
srcBox.bottom--;
}
srcBox.back = 1;
// AVFrame info are udpate just when the captured game window and the texture are diffrent.
// In the same time texture is reallocated.
if( ( ( srcBox.right - srcBox.left ) != _CapturedTextureDesc.Width )
|| ( ( srcBox.bottom - srcBox.top ) != _CapturedTextureDesc.Height )
) {
LOGD( "Game window: %dx%d ; %d->%d", _pGameWindow->getLeftPos(), _pGameWindow->getTopPos(), _pGameWindow->getWidth(), _pGameWindow->getHeight() );
LOGD( "Texture creation %dx%d -> %dx%d", srcBox.left, srcBox.top, srcBox.right, srcBox.bottom );
// Create the new texture
iRet = createCapturedTexture( srcBox.right - srcBox.left, srcBox.bottom - srcBox.top );
}
DirectX11Util::GetInstance()->getD3D11DeviceContext()->CopySubresourceRegion( _pGameTexture, 0, 0, 0, 0, pCapturedTexture, 0, &srcBox );
}
if( nullptr != _pDxgiResource ) {
_pOutputDuplication->ReleaseFrame();
pCapturedTexture->Release();
_pDxgiResource->Release();
_pDxgiResource = nullptr;
}
iRet = RET_OK;
return iRet;
}
在重新创建 IDXGIOutputDuplication 之前发布 D3d11 捕获的下方：
int DxgiVideoCapture::close() {
if( nullptr != _pGameTexture ) {
ZeroMemory( &_CapturedTextureDesc, sizeof( D3D11_TEXTURE2D_DESC ) );
_pGameTexture->Release();
_pGameTexture = nullptr;
}
if( nullptr != _pDxgiResource ){
_pOutputDuplication->ReleaseFrame();
_pDxgiResource->Release();
_pDxgiResource = nullptr;
}
if( nullptr != _pOutputDuplication ) {
_pOutputDuplication->Release();
_pOutputDuplication = nullptr;
}
return RET_OK;
}
我想知道的是如何投资这个崩溃（应用程序结束时没有任何消息）。为了更准确，我交叉编译了我的应用程序，但行为似乎相同。你知道如何投资这个问题吗？如果您想了解更多详情，请告诉我。
提前致谢 ！