Method create

src/engine/AudioEngine.cpp:814–894

}

std::unique_ptr<Engine::Implementation> Xaudio2Implementation::create(Options const & opts)
{
    HRESULT hr;
    if (FAILED(hr = CoInitializeEx(NULL, COINIT_MULTITHREADED)))
    {
        log::warning("AudioEngine : cannot initialize multi-threaded mode");
        return nullptr;
    }

    std::unique_ptr<Xaudio2Implementation> result(std::move(new Xaudio2Implementation(opts)));

    // interface
    if (FAILED(hr = XAudio2Create(&result->m_xaudio2, 0)))
    {
        log::warning("AudioEngine : cannot initialize XAudio2 interface");
        return nullptr;
    }

    if (FAILED(hr = result->m_xaudio2->RegisterForCallbacks(&result->m_callback)))
    {
        log::warning("AudioEngine : failed to register XAudio2 callback");
        return nullptr;
    }

    // mastering voice
    if (FAILED(hr = result->m_xaudio2->CreateMasteringVoice(&result->m_master, 2, opts.masteringRate)))
    {
        log::warning("AudioEngine : cannot initialize mastering mixer");
        return nullptr;
    }

    DWORD masterMask;
    if (FAILED(hr = result->m_master->GetChannelMask(&masterMask)))
    {
        log::warning("AudioEngine : error retrivieving mastering voice mask");
        return nullptr;
    }
    result->m_masterMask = masterMask;

    XAUDIO2_VOICE_DETAILS details;
    result->m_master->GetVoiceDetails(&details);
    result->m_masterChannels = details.InputChannels;
    result->m_masterRate = details.InputSampleRate;

    log::info("AudioEngine master voice : %d channels %d kHz 0x%x", details.InputChannels, details.InputSampleRate, masterMask);

    result->m_master->SetVolume(opts.masterVolume);

    // submix voices
    if (FAILED(hr = result->m_xaudio2->CreateSubmixVoice(&result->m_music, 2, opts.masteringRate)))
    {
        log::warning("AudioEngine : cannot initialize music mixer");
        return nullptr;
    }

    result->m_music->SetVolume(opts.musicVolume);

    if (FAILED(hr = result->m_xaudio2->CreateSubmixVoice(&result->m_effects, 2, opts.masteringRate)))