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#include "directshowaudioendpointcontrol.h"

#include "directshowglobal.h"

#include "directshowplayerservice.h"

DirectShowAudioEndpointControl::DirectShowAudioEndpointControl(

        DirectShowPlayerService *service, QObject *parent)

    : QAudioEndpointSelector(parent)

    , m_service(service)

    , m_bindContext(0)

    , m_deviceEnumerator(0)

{

    if (CreateBindCtx(0, &m_bindContext) == S_OK) {

        m_deviceEnumerator = com_new<ICreateDevEnum>(CLSID_SystemDeviceEnum, IID_ICreateDevEnum);

        updateEndpoints();

        setActiveEndpoint(m_defaultEndpoint);

    }

}

DirectShowAudioEndpointControl::~DirectShowAudioEndpointControl()

{

    foreach (IMoniker *moniker, m_devices)

        moniker->Release();

    if (m_bindContext)

        m_bindContext->Release();

    if (m_deviceEnumerator)

        m_deviceEnumerator->Release();

}

QList<QString> DirectShowAudioEndpointControl::availableEndpoints() const

{

    return m_devices.keys();

}

QString DirectShowAudioEndpointControl::endpointDescription(const QString &name) const

{

#ifdef __IPropertyBag_INTERFACE_DEFINED__

    QString description;

    if (IMoniker *moniker = m_devices.value(name, 0)) {

        IPropertyBag *propertyBag = 0;

        if (SUCCEEDED(moniker->BindToStorage(

                0, 0, IID_IPropertyBag, reinterpret_cast<void **>(&propertyBag)))) {

            VARIANT name;

            VariantInit(&name);

            if (SUCCEEDED(propertyBag->Read(L"FriendlyName", &name, 0)))

                description = QString::fromWCharArray(name.bstrVal);

            VariantClear(&name);

            propertyBag->Release();

        }

    }

    return description;

#else

    return name.section(QLatin1Char('\\'), -1);

#endif

}

QString DirectShowAudioEndpointControl::defaultEndpoint() const

{

    return m_defaultEndpoint;

}

QString DirectShowAudioEndpointControl::activeEndpoint() const

{

    return m_activeEndpoint;

}

void DirectShowAudioEndpointControl::setActiveEndpoint(const QString &name)

{

    if (m_activeEndpoint == name)

        return;

    if (IMoniker *moniker = m_devices.value(name, 0)) {

        IBaseFilter *filter = 0;

        if (moniker->BindToObject(

                m_bindContext,

                0,

                IID_IBaseFilter,

                reinterpret_cast<void **>(&filter)) == S_OK) {

            m_service->setAudioOutput(filter);

            filter->Release();

        }

    }

}

void DirectShowAudioEndpointControl::updateEndpoints()

{

    IMalloc *oleMalloc = 0;

    if (m_deviceEnumerator && CoGetMalloc(1, &oleMalloc) == S_OK) {

        IEnumMoniker *monikers = 0;

        if (m_deviceEnumerator->CreateClassEnumerator(

                CLSID_AudioRendererCategory, &monikers, 0) == S_OK) {

            for (IMoniker *moniker = 0; monikers->Next(1, &moniker, 0) == S_OK; moniker->Release()) {

                OLECHAR *string = 0;

                if (moniker->GetDisplayName(m_bindContext, 0, &string) == S_OK) {

                    QString deviceId = QString::fromWCharArray(string);

                    oleMalloc->Free(string);

                    moniker->AddRef();

                    m_devices.insert(deviceId, moniker);

                    if (m_defaultEndpoint.isEmpty()

                            || deviceId.endsWith(QLatin1String("Default DirectSound Device"))) {

                        m_defaultEndpoint = deviceId;

                    }

                }

            }

            monikers->Release();

        }

        oleMalloc->Release();

    }

}