/*
 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef AUDIO_DEVICE_AUDIO_DEVICE_CORE_WIN_H_
#define AUDIO_DEVICE_AUDIO_DEVICE_CORE_WIN_H_

#if (_MSC_VER >= 1400)  // only include for VS 2005 and higher

#include "rtc_base/win32.h"

#include "modules/audio_device/audio_device_generic.h"

#include <wmcodecdsp.h>      // CLSID_CWMAudioAEC
                             // (must be before audioclient.h)
#include <audioclient.h>     // WASAPI
#include <audiopolicy.h>
#include <mmdeviceapi.h>     // MMDevice
#include <avrt.h>            // Avrt
#include <endpointvolume.h>
#include <mediaobj.h>        // IMediaObject

#include "rtc_base/criticalsection.h"
#include "rtc_base/scoped_ref_ptr.h"

// Use Multimedia Class Scheduler Service (MMCSS) to boost the thread priority
#pragma comment( lib, "avrt.lib" )
// AVRT function pointers
typedef BOOL (WINAPI *PAvRevertMmThreadCharacteristics)(HANDLE);
typedef HANDLE (WINAPI *PAvSetMmThreadCharacteristicsA)(LPCSTR, LPDWORD);
typedef BOOL (WINAPI *PAvSetMmThreadPriority)(HANDLE, AVRT_PRIORITY);

namespace webrtc {

const float MAX_CORE_SPEAKER_VOLUME = 255.0f;
const float MIN_CORE_SPEAKER_VOLUME = 0.0f;
const float MAX_CORE_MICROPHONE_VOLUME = 255.0f;
const float MIN_CORE_MICROPHONE_VOLUME = 0.0f;
const uint16_t CORE_SPEAKER_VOLUME_STEP_SIZE = 1;
const uint16_t CORE_MICROPHONE_VOLUME_STEP_SIZE = 1;

// Utility class which initializes COM in the constructor (STA or MTA),
// and uninitializes COM in the destructor.
class ScopedCOMInitializer {
 public:
  // Enum value provided to initialize the thread as an MTA instead of STA.
  enum SelectMTA { kMTA };

  // Constructor for STA initialization.
  ScopedCOMInitializer() {
    Initialize(COINIT_APARTMENTTHREADED);
  }

  // Constructor for MTA initialization.
  explicit ScopedCOMInitializer(SelectMTA mta) {
    Initialize(COINIT_MULTITHREADED);
  }

  ScopedCOMInitializer::~ScopedCOMInitializer() {
    if (SUCCEEDED(hr_))
      CoUninitialize();
  }

  bool succeeded() const { return SUCCEEDED(hr_); }

 private:
  void Initialize(COINIT init) {
    hr_ = CoInitializeEx(NULL, init);
  }

  HRESULT hr_;

  ScopedCOMInitializer(const ScopedCOMInitializer&);
  void operator=(const ScopedCOMInitializer&);
};


class AudioDeviceWindowsCore : public AudioDeviceGeneric
{
public:
    AudioDeviceWindowsCore();
    ~AudioDeviceWindowsCore();

    static bool CoreAudioIsSupported();

    // Retrieve the currently utilized audio layer
    virtual int32_t ActiveAudioLayer(AudioDeviceModule::AudioLayer& audioLayer) const;

    // Main initializaton and termination
    virtual InitStatus Init();
    virtual int32_t Terminate();
    virtual bool Initialized() const;

    // Device enumeration
    virtual int16_t PlayoutDevices();
    virtual int16_t RecordingDevices();
    virtual int32_t PlayoutDeviceName(
        uint16_t index,
        char name[kAdmMaxDeviceNameSize],
        char guid[kAdmMaxGuidSize]);
    virtual int32_t RecordingDeviceName(
        uint16_t index,
        char name[kAdmMaxDeviceNameSize],
        char guid[kAdmMaxGuidSize]);

    // Device selection
    virtual int32_t SetPlayoutDevice(uint16_t index);
    virtual int32_t SetPlayoutDevice(AudioDeviceModule::WindowsDeviceType device);
    virtual int32_t SetRecordingDevice(uint16_t index);
    virtual int32_t SetRecordingDevice(AudioDeviceModule::WindowsDeviceType device);

    // Audio transport initialization
    virtual int32_t PlayoutIsAvailable(bool& available);
    virtual int32_t InitPlayout();
    virtual bool PlayoutIsInitialized() const;
    virtual int32_t RecordingIsAvailable(bool& available);
    virtual int32_t InitRecording();
    virtual bool RecordingIsInitialized() const;

    // Audio transport control
    virtual int32_t StartPlayout();
    virtual int32_t StopPlayout();
    virtual bool Playing() const;
    virtual int32_t StartRecording();
    virtual int32_t StopRecording();
    virtual bool Recording() const;

    // Audio mixer initialization
    virtual int32_t InitSpeaker();
    virtual bool SpeakerIsInitialized() const;
    virtual int32_t InitMicrophone();
    virtual bool MicrophoneIsInitialized() const;

    // Speaker volume controls
    virtual int32_t SpeakerVolumeIsAvailable(bool& available);
    virtual int32_t SetSpeakerVolume(uint32_t volume);
    virtual int32_t SpeakerVolume(uint32_t& volume) const;
    virtual int32_t MaxSpeakerVolume(uint32_t& maxVolume) const;
    virtual int32_t MinSpeakerVolume(uint32_t& minVolume) const;

    // Microphone volume controls
    virtual int32_t MicrophoneVolumeIsAvailable(bool& available);
    virtual int32_t SetMicrophoneVolume(uint32_t volume);
    virtual int32_t MicrophoneVolume(uint32_t& volume) const;
    virtual int32_t MaxMicrophoneVolume(uint32_t& maxVolume) const;
    virtual int32_t MinMicrophoneVolume(uint32_t& minVolume) const;

    // Speaker mute control
    virtual int32_t SpeakerMuteIsAvailable(bool& available);
    virtual int32_t SetSpeakerMute(bool enable);
    virtual int32_t SpeakerMute(bool& enabled) const;

    // Microphone mute control
    virtual int32_t MicrophoneMuteIsAvailable(bool& available);
    virtual int32_t SetMicrophoneMute(bool enable);
    virtual int32_t MicrophoneMute(bool& enabled) const;

    // Stereo support
    virtual int32_t StereoPlayoutIsAvailable(bool& available);
    virtual int32_t SetStereoPlayout(bool enable);
    virtual int32_t StereoPlayout(bool& enabled) const;
    virtual int32_t StereoRecordingIsAvailable(bool& available);
    virtual int32_t SetStereoRecording(bool enable);
    virtual int32_t StereoRecording(bool& enabled) const;

    // Delay information and control
    virtual int32_t PlayoutDelay(uint16_t& delayMS) const;

    virtual bool BuiltInAECIsAvailable() const;

    virtual int32_t EnableBuiltInAEC(bool enable);

public:
    virtual void AttachAudioBuffer(AudioDeviceBuffer* audioBuffer);

private:
    bool KeyPressed() const;

private:    // avrt function pointers
    PAvRevertMmThreadCharacteristics    _PAvRevertMmThreadCharacteristics;
    PAvSetMmThreadCharacteristicsA      _PAvSetMmThreadCharacteristicsA;
    PAvSetMmThreadPriority              _PAvSetMmThreadPriority;
    HMODULE                             _avrtLibrary;
    bool                                _winSupportAvrt;

private:    // thread functions
    DWORD InitCaptureThreadPriority();
    void RevertCaptureThreadPriority();
    static DWORD WINAPI WSAPICaptureThread(LPVOID context);
    DWORD DoCaptureThread();

    static DWORD WINAPI WSAPICaptureThreadPollDMO(LPVOID context);
    DWORD DoCaptureThreadPollDMO();

    static DWORD WINAPI WSAPIRenderThread(LPVOID context);
    DWORD DoRenderThread();

    void _Lock();
    void _UnLock();

    int SetDMOProperties();

    int SetBoolProperty(IPropertyStore* ptrPS,
                        REFPROPERTYKEY key,
                        VARIANT_BOOL value);

    int SetVtI4Property(IPropertyStore* ptrPS,
                        REFPROPERTYKEY key,
                        LONG value);

    int32_t _EnumerateEndpointDevicesAll(EDataFlow dataFlow) const;
    void _TraceCOMError(HRESULT hr) const;

    int32_t _RefreshDeviceList(EDataFlow dir);
    int16_t _DeviceListCount(EDataFlow dir);
    int32_t _GetDefaultDeviceName(EDataFlow dir, ERole role, LPWSTR szBuffer, int bufferLen);
    int32_t _GetListDeviceName(EDataFlow dir, int index, LPWSTR szBuffer, int bufferLen);
    int32_t _GetDeviceName(IMMDevice* pDevice, LPWSTR pszBuffer, int bufferLen);
    int32_t _GetListDeviceID(EDataFlow dir, int index, LPWSTR szBuffer, int bufferLen);
    int32_t _GetDefaultDeviceID(EDataFlow dir, ERole role, LPWSTR szBuffer, int bufferLen);
    int32_t _GetDefaultDeviceIndex(EDataFlow dir, ERole role, int* index);
    int32_t _GetDeviceID(IMMDevice* pDevice, LPWSTR pszBuffer, int bufferLen);
    int32_t _GetDefaultDevice(EDataFlow dir, ERole role, IMMDevice** ppDevice);
    int32_t _GetListDevice(EDataFlow dir, int index, IMMDevice** ppDevice);

    // Converts from wide-char to UTF-8 if UNICODE is defined.
    // Does nothing if UNICODE is undefined.
    char* WideToUTF8(const TCHAR* src) const;

    int32_t InitRecordingDMO();

    ScopedCOMInitializer                    _comInit;
    AudioDeviceBuffer*                      _ptrAudioBuffer;
    rtc::CriticalSection                    _critSect;
    rtc::CriticalSection                    _volumeMutex;

    IMMDeviceEnumerator*                    _ptrEnumerator;
    IMMDeviceCollection*                    _ptrRenderCollection;
    IMMDeviceCollection*                    _ptrCaptureCollection;
    IMMDevice*                              _ptrDeviceOut;
    IMMDevice*                              _ptrDeviceIn;

    IAudioClient*                           _ptrClientOut;
    IAudioClient*                           _ptrClientIn;
    IAudioRenderClient*                     _ptrRenderClient;
    IAudioCaptureClient*                    _ptrCaptureClient;
    IAudioEndpointVolume*                   _ptrCaptureVolume;
    ISimpleAudioVolume*                     _ptrRenderSimpleVolume;

    // DirectX Media Object (DMO) for the built-in AEC.
    rtc::scoped_refptr<IMediaObject> _dmo;
    rtc::scoped_refptr<IMediaBuffer> _mediaBuffer;
    bool                                    _builtInAecEnabled;

    HANDLE                                  _hRenderSamplesReadyEvent;
    HANDLE                                  _hPlayThread;
    HANDLE                                  _hRenderStartedEvent;
    HANDLE                                  _hShutdownRenderEvent;

    HANDLE                                  _hCaptureSamplesReadyEvent;
    HANDLE                                  _hRecThread;
    HANDLE                                  _hCaptureStartedEvent;
    HANDLE                                  _hShutdownCaptureEvent;

    HANDLE                                  _hMmTask;

    UINT                                    _playAudioFrameSize;
    uint32_t                          _playSampleRate;
    uint32_t                          _devicePlaySampleRate;
    uint32_t                          _playBlockSize;
    uint32_t                          _devicePlayBlockSize;
    uint32_t                          _playChannels;
    uint32_t                          _sndCardPlayDelay;
    UINT64                                  _writtenSamples;

    UINT                                    _recAudioFrameSize;
    uint32_t                          _recSampleRate;
    uint32_t                          _recBlockSize;
    uint32_t                          _recChannels;
    UINT64                                  _readSamples;
    uint32_t                          _sndCardRecDelay;

    uint16_t                          _recChannelsPrioList[3];
    uint16_t                          _playChannelsPrioList[2];

    LARGE_INTEGER                           _perfCounterFreq;
    double                                  _perfCounterFactor;

private:
    bool                                    _initialized;
    bool                                    _recording;
    bool                                    _playing;
    bool                                    _recIsInitialized;
    bool                                    _playIsInitialized;
    bool                                    _speakerIsInitialized;
    bool                                    _microphoneIsInitialized;

    bool                                    _usingInputDeviceIndex;
    bool                                    _usingOutputDeviceIndex;
    AudioDeviceModule::WindowsDeviceType    _inputDevice;
    AudioDeviceModule::WindowsDeviceType    _outputDevice;
    uint16_t                          _inputDeviceIndex;
    uint16_t                          _outputDeviceIndex;

    mutable char                            _str[512];
};

#endif    // #if (_MSC_VER >= 1400)

}  // namespace webrtc

#endif  // AUDIO_DEVICE_AUDIO_DEVICE_CORE_WIN_H_