hackedteam/core-winmobile

#include <Windows.h>
#include <atlbase.h>

const GUID MCLSID_EncoderQuality = { 0x1d5be4b5,0xfa4a,0x452d, { 0x9c,0xdd,0x5d,0xb3,0x51,0x05,0xe7,0xeb } };

HRESULT GetEncoderFromName(    IImagingFactory* pImgFactory,
                            LPWSTR lpStrEnc,
                            GUID* guid )
{
    HRESULT hr = E_FAIL;
    ImageCodecInfo *encoders, *ePtr;
    unsigned int uEncCount = 0;
    ZeroMemory(guid,sizeof(GUID));

    hr = pImgFactory->GetInstalledEncoders(&uEncCount, &encoders);

    if(SUCCEEDED(hr) && uEncCount > 0){
        ePtr = encoders;

        for(unsigned int i = 0; i < uEncCount; i++){
            if( 0 == wcscmp(ePtr->FormatDescription, lpStrEnc)){
                CopyMemory(guid, &(ePtr->Clsid), sizeof(GUID));
                hr = S_OK;
                break;
            }
            ePtr++;
        }
    }

    ePtr = NULL;

    if(encoders)
        CoTaskMemFree((LPVOID)encoders);

    return hr;
}

HRESULT SetEncoderStream(IImagingFactory* pImgFactory,
                         GUID*             guidJpeg,
                         IStream**         pOutStream,
                         IImageEncoder**     pImageEncoder )
{
    //ASSERT(pImgFactory);

    HRESULT hr = E_FAIL;

    hr = CreateStreamOnHGlobal(NULL, TRUE, (LPSTREAM*) pOutStream);

    if(SUCCEEDED(hr)){
        hr = pImgFactory->CreateImageEncoderToStream(    (CLSID*)guidJpeg,
                                                        *pOutStream,
                                                        pImageEncoder );
    }

    return hr;
}

HRESULT SetEncoderQuality(CComPtr<IImageEncoder> pImageEncoder, long lQuality)
{
    //ASSERT(pImageEncoder);

    HRESULT hr = E_FAIL;

    if(pImageEncoder == NULL)
        return hr;

    EncoderParameters* ParamsList;
    unsigned int uParamNumber = 1;

    ParamsList = (EncoderParameters*)CoTaskMemAlloc(sizeof (EncoderParameters) + (uParamNumber-1) * sizeof(EncoderParameter));
    ParamsList->Count = uParamNumber;
    EncoderParameter* pPar = NULL;
    pPar = &(ParamsList->Parameter[0]);
    pPar->Guid           = MCLSID_EncoderQuality;
    pPar->NumberOfValues = 1;
    pPar->Type           = EncoderParameterValueTypeLong;
    pPar->Value          = (void*) &lQuality;

    hr = pImageEncoder->SetEncoderParameters(ParamsList);

    CoTaskMemFree(ParamsList);

    return hr;
}