WASAPIDevice.h

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/*******************************************************************************
 * Copyright 2009-2016 Jörg Müller
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
 
#pragma once
 
#ifdef WASAPI_PLUGIN
#define AUD_BUILD_PLUGIN
#endif

 
#include "devices/ThreadedDevice.h"
 
#include <thread>
 
#include <windows.h>
#include <audioclient.h>
#include <mmdeviceapi.h>
#include <mmreg.h>
#include <wrl/client.h>
 
AUD_NAMESPACE_BEGIN
 
using Microsoft::WRL::ComPtr;

class AUD_PLUGIN_API WASAPIDevice : IMMNotificationClient, public ThreadedDevice
{
private:
    int m_buffersize;
    ComPtr<IMMDeviceEnumerator> m_imm_device_enumerator;
    ComPtr<IMMDevice> m_imm_device;
    ComPtr<IAudioClient> m_audio_client;
    WAVEFORMATEXTENSIBLE m_wave_format_extensible;
    bool m_default_device_changed;
    LONG m_reference_count;
 
    AUD_LOCAL HRESULT setupRenderClient(IAudioRenderClient*& render_client, UINT32& buffer_size);

    AUD_LOCAL void runMixingThread();
 
    AUD_LOCAL bool setupDevice(DeviceSpecs& specs);
 
    // IUnknown implementation
    ULONG STDMETHODCALLTYPE AddRef();
    ULONG STDMETHODCALLTYPE Release();
    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);
    // IMMNotificationClient implementation
    HRESULT STDMETHODCALLTYPE OnDeviceStateChanged(LPCWSTR pwstrDeviceId, DWORD dwNewState);
    HRESULT STDMETHODCALLTYPE OnDeviceAdded(LPCWSTR pwstrDeviceId);
    HRESULT STDMETHODCALLTYPE OnDeviceRemoved(LPCWSTR pwstrDeviceId);
    HRESULT STDMETHODCALLTYPE OnDefaultDeviceChanged(EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId);
    HRESULT STDMETHODCALLTYPE OnPropertyValueChanged(LPCWSTR pwstrDeviceId, const PROPERTYKEY key);
 
    // delete copy constructor and operator=
    WASAPIDevice(const WASAPIDevice&) = delete;
    WASAPIDevice& operator=(const WASAPIDevice&) = delete;
 
public:
    WASAPIDevice(DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);

    virtual ~WASAPIDevice();

    static void registerPlugin();
};
 
AUD_NAMESPACE_END