/*
 *  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 WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_WAVE_WIN_H
#define WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_WAVE_WIN_H

#include "webrtc/base/platform_thread.h"
#include "webrtc/modules/audio_device/audio_device_generic.h"
#include "webrtc/modules/audio_device/win/audio_mixer_manager_win.h"

#pragma comment( lib, "winmm.lib" )

namespace webrtc {
class EventTimerWrapper;
class EventWrapper;

const uint32_t TIMER_PERIOD_MS = 2;
const uint32_t REC_CHECK_TIME_PERIOD_MS = 4;
const uint16_t REC_PUT_BACK_DELAY = 4;

const uint32_t N_REC_SAMPLES_PER_SEC = 48000;
const uint32_t N_PLAY_SAMPLES_PER_SEC = 48000;

const uint32_t N_REC_CHANNELS = 1;  // default is mono recording
const uint32_t N_PLAY_CHANNELS = 2; // default is stereo playout

// NOTE - CPU load will not be correct for other sizes than 10ms
const uint32_t REC_BUF_SIZE_IN_SAMPLES = (N_REC_SAMPLES_PER_SEC/100);
const uint32_t PLAY_BUF_SIZE_IN_SAMPLES = (N_PLAY_SAMPLES_PER_SEC/100);

enum { N_BUFFERS_IN = 200 };
enum { N_BUFFERS_OUT = 200 };

class AudioDeviceWindowsWave : public AudioDeviceGeneric
{
public:
    AudioDeviceWindowsWave(const int32_t id);
    ~AudioDeviceWindowsWave();

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

    // Main initializaton and termination
    virtual int32_t 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;

    // Microphone Automatic Gain Control (AGC)
    virtual int32_t SetAGC(bool enable);
    virtual bool AGC() const;

    // Volume control based on the Windows Wave API (Windows only)
    virtual int32_t SetWaveOutVolume(uint16_t volumeLeft, uint16_t volumeRight);
    virtual int32_t WaveOutVolume(uint16_t& volumeLeft, uint16_t& volumeRight) 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;
    virtual int32_t SpeakerVolumeStepSize(uint16_t& stepSize) 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;
    virtual int32_t MicrophoneVolumeStepSize(uint16_t& stepSize) 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;

    // Microphone boost control
    virtual int32_t MicrophoneBoostIsAvailable(bool& available);
    virtual int32_t SetMicrophoneBoost(bool enable);
    virtual int32_t MicrophoneBoost(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 SetPlayoutBuffer(const AudioDeviceModule::BufferType type, uint16_t sizeMS);
    virtual int32_t PlayoutBuffer(AudioDeviceModule::BufferType& type, uint16_t& sizeMS) const;
    virtual int32_t PlayoutDelay(uint16_t& delayMS) const;
    virtual int32_t RecordingDelay(uint16_t& delayMS) const;

    // CPU load
    virtual int32_t CPULoad(uint16_t& load) const;

public:
    virtual bool PlayoutWarning() const;
    virtual bool PlayoutError() const;
    virtual bool RecordingWarning() const;
    virtual bool RecordingError() const;
    virtual void ClearPlayoutWarning();
    virtual void ClearPlayoutError();
    virtual void ClearRecordingWarning();
    virtual void ClearRecordingError();

public:
    virtual void AttachAudioBuffer(AudioDeviceBuffer* audioBuffer);

private:
    void Lock() { _critSect.Enter(); };
    void UnLock() { _critSect.Leave(); };
    int32_t Id() {return _id;}
    bool IsUsingOutputDeviceIndex() const {return _usingOutputDeviceIndex;}
    AudioDeviceModule::WindowsDeviceType OutputDevice() const {return _outputDevice;}
    uint16_t OutputDeviceIndex() const {return _outputDeviceIndex;}
    bool IsUsingInputDeviceIndex() const {return _usingInputDeviceIndex;}
    AudioDeviceModule::WindowsDeviceType InputDevice() const {return _inputDevice;}
    uint16_t InputDeviceIndex() const {return _inputDeviceIndex;}

private:
    inline int32_t InputSanityCheckAfterUnlockedPeriod() const;
    inline int32_t OutputSanityCheckAfterUnlockedPeriod() const;

private:
    bool KeyPressed() const;

private:
    int32_t EnumeratePlayoutDevices();
    int32_t EnumerateRecordingDevices();
    void TraceSupportFlags(DWORD dwSupport) const;
    void TraceWaveInError(MMRESULT error) const;
    void TraceWaveOutError(MMRESULT error) const;
    int32_t PrepareStartRecording();
    int32_t PrepareStartPlayout();

    int32_t RecProc(LONGLONG& consumedTime);
    int PlayProc(LONGLONG& consumedTime);

    int32_t GetPlayoutBufferDelay(uint32_t& writtenSamples, uint32_t& playedSamples);
    int32_t GetRecordingBufferDelay(uint32_t& readSamples, uint32_t& recSamples);
    int32_t Write(int8_t* data, uint16_t nSamples);
    int32_t GetClockDrift(const uint32_t plSamp, const uint32_t rcSamp);
    int32_t MonitorRecording(const uint32_t time);
    int32_t RestartTimerIfNeeded(const uint32_t time);

private:
    static bool ThreadFunc(void*);
    bool ThreadProcess();

    static DWORD WINAPI GetCaptureVolumeThread(LPVOID context);
    DWORD DoGetCaptureVolumeThread();

    static DWORD WINAPI SetCaptureVolumeThread(LPVOID context);
    DWORD DoSetCaptureVolumeThread();

private:
    AudioDeviceBuffer*                      _ptrAudioBuffer;

    CriticalSectionWrapper&                 _critSect;
    EventTimerWrapper&                      _timeEvent;
    EventWrapper&                           _recStartEvent;
    EventWrapper&                           _playStartEvent;

    HANDLE                                  _hGetCaptureVolumeThread;
    HANDLE                                  _hShutdownGetVolumeEvent;
    HANDLE                                  _hSetCaptureVolumeThread;
    HANDLE                                  _hShutdownSetVolumeEvent;
    HANDLE                                  _hSetCaptureVolumeEvent;

    rtc::scoped_ptr<PlatformThread>          _ptrThread;

    CriticalSectionWrapper&                 _critSectCb;

    int32_t                                 _id;

    AudioMixerManager                       _mixerManager;

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

    WAVEFORMATEX                            _waveFormatIn;
    WAVEFORMATEX                            _waveFormatOut;

    HWAVEIN                                 _hWaveIn;
    HWAVEOUT                                _hWaveOut;

    WAVEHDR                                 _waveHeaderIn[N_BUFFERS_IN];
    WAVEHDR                                 _waveHeaderOut[N_BUFFERS_OUT];

    uint8_t                                 _recChannels;
    uint8_t                                 _playChannels;
    uint16_t                                _recBufCount;
    uint16_t                                _recDelayCount;
    uint16_t                                _recPutBackDelay;

    int8_t               _recBuffer[N_BUFFERS_IN][4*REC_BUF_SIZE_IN_SAMPLES];
    int8_t               _playBuffer[N_BUFFERS_OUT][4*PLAY_BUF_SIZE_IN_SAMPLES];

    AudioDeviceModule::BufferType           _playBufType;

private:
    bool                                    _initialized;
    bool                                    _recording;
    bool                                    _playing;
    bool                                    _recIsInitialized;
    bool                                    _playIsInitialized;
    bool                                    _startRec;
    bool                                    _stopRec;
    bool                                    _startPlay;
    bool                                    _stopPlay;
    bool                                    _AGC;

private:
    uint32_t                          _prevPlayTime;
    uint32_t                          _prevRecTime;
    uint32_t                          _prevTimerCheckTime;

    uint16_t                          _playBufCount;          // playout buffer index
    uint16_t                          _dTcheckPlayBufDelay;   // dT for check of play buffer, {2,5,10} [ms]
    uint16_t                          _playBufDelay;          // playback delay
    uint16_t                          _playBufDelayFixed;     // fixed playback delay
    uint16_t                          _minPlayBufDelay;       // minimum playback delay
    uint16_t                          _MAX_minBuffer;         // level of (adaptive) min threshold must be < _MAX_minBuffer

    int32_t                           _erZeroCounter;         // counts "buffer-is-empty" events
    int32_t                           _intro;
    int32_t                           _waitCounter;

    uint32_t                          _writtenSamples;
    uint32_t                          _writtenSamplesOld;
    uint32_t                          _playedSamplesOld;

    uint32_t                          _sndCardPlayDelay;
    uint32_t                          _sndCardRecDelay;

    uint32_t                          _plSampOld;
    uint32_t                          _rcSampOld;

    uint32_t                          _read_samples;
    uint32_t                          _read_samples_old;
    uint32_t                          _rec_samples_old;

    // State that detects driver problems:
    int32_t                           _dc_diff_mean;
    int32_t                           _dc_y_prev;
    int32_t                           _dc_penalty_counter;
    int32_t                           _dc_prevtime;
    uint32_t                          _dc_prevplay;

    uint32_t                          _recordedBytes;         // accumulated #recorded bytes (reset periodically)
    uint32_t                          _prevRecByteCheckTime;  // time when we last checked the recording process

    // CPU load measurements
    LARGE_INTEGER                           _perfFreq;
    LONGLONG                                _playAcc;               // accumulated time for playout callback
    float                                   _avgCPULoad;            // average total (rec+play) CPU load

    int32_t                           _wrapCounter;

    int32_t                           _useHeader;
    int16_t                           _timesdwBytes;
    int32_t                           _no_of_msecleft_warnings;
    int32_t                           _writeErrors;
    int32_t                           _timerFaults;
    int32_t                           _timerRestartAttempts;

    uint16_t                          _playWarning;
    uint16_t                          _playError;
    uint16_t                          _recWarning;
    uint16_t                          _recError;

    uint32_t                          _newMicLevel;
    uint32_t                          _minMicVolume;
    uint32_t                          _maxMicVolume;
};

}  // namespace webrtc

#endif  // WEBRTC_AUDIO_DEVICE_AUDIO_DEVICE_WAVE_WIN_H