/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
#include "HeadSpin.h"
#include "hsTimer.h"
#include "hsResMgr.h"
#include <al.h>
#include <alc.h>
#include "plDSoundBuffer.h"
#include <speex/speex.h>
#include <speex/speex_bits.h>
#include "hsGeometry3.h"
#include "plVoiceChat.h"
#include "plAudioSystem.h"
#include "plgDispatch.h"
#include "plAudible/plWinAudible.h"
#include "plNetMessage/plNetMessage.h"
#include "plPipeline/plPlates.h"
#include "plAvatar/plAvatarMgr.h"
#include "plAvatar/plArmatureMod.h"
#include "hsQuat.h"
#include "plAudioCore/plAudioCore.h"

// DEBUG for printing to the console
#include "plMessage/plConsoleMsg.h"
#include "plPipeline/plDebugText.h"
#include "plStatusLog/plStatusLog.h"

#define MICROPHONE          "ui_microphone.png"
#define TALKING             "ui_speaker.png"
#define NUM_CHANNELS        1
#define VOICE_STOP_MS       2000
#define MAX_DATA_SIZE       1024 * 4    // 4 KB

hsBool                  plVoiceRecorder::fCompress =                true;
hsBool                  plVoiceRecorder::fRecording =               true;
hsBool                  plVoiceRecorder::fNetVoice =                false;
short                   plVoiceRecorder::fSampleRate =              FREQUENCY;
float                plVoiceRecorder::fRecordThreshhold =        200.0f;
hsBool                  plVoiceRecorder::fShowIcons =               true;
hsBool                  plVoiceRecorder::fMicAlwaysOpen =           false;
hsBool                  plVoicePlayer::fEnabled =                   true;

plVoiceRecorder::plVoiceRecorder()
{
    plPlateManager::Instance().CreatePlate( &fDisabledIcon );
    fDisabledIcon->CreateFromResource( MICROPHONE );
    fDisabledIcon->SetPosition(-0.90, -0.90);
    fDisabledIcon->SetSize(0.0675, 0.09);
    fDisabledIcon->SetVisible(false);

    plPlateManager::Instance().CreatePlate( &fTalkIcon );
    fTalkIcon->CreateFromResource( TALKING );
    fTalkIcon->SetPosition(-0.9,-0.9);
    fTalkIcon->SetSize(0.0675, 0.09);
    fTalkIcon->SetVisible(false);
}

plVoiceRecorder::~plVoiceRecorder()
{
    if(fDisabledIcon)
        plPlateManager::Instance().DestroyPlate( fDisabledIcon);
    fDisabledIcon = nil;
    
    if (fTalkIcon)
        plPlateManager::Instance().DestroyPlate( fTalkIcon );
    fTalkIcon = nil;
}

void plVoiceRecorder::IncreaseRecordingThreshhold()
{
    fRecordThreshhold += (100 * hsTimer::GetDelSysSeconds());
    if (fRecordThreshhold >= 10000.0f)
        fRecordThreshhold = 10000.0f;
    
    plDebugText &txt = plDebugText::Instance();
    char str[256];
    sprintf(str, "RecordThreshhold %f\n", fRecordThreshhold);
    txt.DrawString(400,300,str);
}

void plVoiceRecorder::DecreaseRecordingThreshhold()
{
    fRecordThreshhold -= (100 * hsTimer::GetDelSysSeconds());
    if (fRecordThreshhold <= 50.0f)
        fRecordThreshhold = 50.0f;
    
    plDebugText &txt = plDebugText::Instance();
    char str[256];
    sprintf(str, "RecordThreshhold %f\n", fRecordThreshhold);
    txt.DrawString(400,300,str);
}

// Set the quality of speex encoder
void plVoiceRecorder::SetQuality(int quality)
{
    char str[] = "Voice quality setting out of range. Must be between 1 and 10 inclusive";
    if(quality < 1 || quality > 10)
    {
        plConsoleMsg    *cMsg = new plConsoleMsg( plConsoleMsg::kAddLine, str );
        plgDispatch::MsgSend( cMsg );
        return;
    }

    if(plSpeex::GetInstance()->IsUsingVBR())
    {
        // Sets average bit rate between 4kb and 13kb
        int AverageBitrate = quality * 1000 + 3000;
        plSpeex::GetInstance()->SetABR(AverageBitrate);
    }
    else
    {
        plSpeex::GetInstance()->SetQuality(quality);        
    }
}

// toggle variable bit rate
void plVoiceRecorder::SetVBR(bool vbr)
{
    plSpeex::GetInstance()->VBR(vbr);
    SetQuality(plSpeex::GetInstance()->GetQuality());       // update proper quality param
}

void plVoiceRecorder::SetComplexity(int c)
{
    char str[] = "Voice quality setting out of range. Must be between 1 and 10 inclusive";
    if(c < 1 || c > 10)
    {
        plConsoleMsg    *cMsg = new plConsoleMsg( plConsoleMsg::kAddLine, str );
        plgDispatch::MsgSend( cMsg );
        return;
    }
    plSpeex::GetInstance()->SetComplexity((uint8_t) c);
}

void plVoiceRecorder::SetENH(hsBool b)
{
    plSpeex::GetInstance()->SetENH(b);
}

void plVoiceRecorder::SetMikeOpen(hsBool b)
{
    ALCdevice *device = plgAudioSys::GetCaptureDevice();
    if (fRecording && device)
    {       
        if (b)
        {
            alcCaptureStart(device);
        }
        else
        {
            alcCaptureStop(device);
        }
        DrawTalkIcon(b);
        fMikeOpen = b;
    }
    else
    {
        DrawDisabledIcon(b);        // voice recording is unavailable or disabled
    }
}

void plVoiceRecorder::DrawDisabledIcon(hsBool b)
{
    if (!fDisabledIcon)
    {
        // at least try and make one here...
        plPlateManager::Instance().CreatePlate( &fDisabledIcon );
        if (fDisabledIcon)
        {
            fDisabledIcon->CreateFromResource( MICROPHONE );
            fDisabledIcon->SetPosition(-0.90, -0.90);
            fDisabledIcon->SetSize(0.0675, 0.09);
            fDisabledIcon->SetVisible(false);
        }
    }

    if (fDisabledIcon)
        fDisabledIcon->SetVisible(b);
}

void plVoiceRecorder::DrawTalkIcon(hsBool b)
{
    if (!fTalkIcon)
    {   
        plPlateManager::Instance().CreatePlate( &fTalkIcon );
        if (fTalkIcon)
        {   fTalkIcon->CreateFromResource( TALKING );
            fTalkIcon->SetPosition(-0.9,-0.9);
            fTalkIcon->SetSize(0.0675, 0.09);
            fTalkIcon->SetVisible(false);
        }   
    }

    if (fTalkIcon)
    {
        fTalkIcon->SetVisible(b);
    }
}

void plVoiceRecorder::Update(double time)
{   
    if(!fRecording)
        return;

    int EncoderFrameSize = plSpeex::GetInstance()->GetFrameSize();
    if(EncoderFrameSize == -1) 
        return;

    ALCdevice *captureDevice = plgAudioSys::GetCaptureDevice();
    if(!captureDevice)
        return;

    unsigned minSamples = EncoderFrameSize * 10;

    ALCint samples;
    alcGetIntegerv(captureDevice, ALC_CAPTURE_SAMPLES, sizeof(samples), &samples );
    
    if (samples > 0)
    {
        if (samples >= minSamples)
        {
            int numFrames = (int)(samples / EncoderFrameSize);      // the number of frames that have been captured
            int totalSamples = numFrames * EncoderFrameSize;

            // cap uncompressed data
            if(totalSamples > MAX_DATA_SIZE)
                totalSamples = MAX_DATA_SIZE;

            // convert to correct units:
            short *buffer = new short[totalSamples];

            alcCaptureSamples(captureDevice, buffer, totalSamples);

            if (!CompressionEnabled())
            {
                plNetMsgVoice pMsg;
                pMsg.SetNetProtocol(kNetProtocolCli2Game);
                pMsg.SetVoiceData((char *)buffer, totalSamples * sizeof(short));
                // set frame size here;
                pMsg.SetPlayerID(plNetClientApp::GetInstance()->GetPlayerID());
                //if (false) //plNetClientApp::GetInstance()->GetFlagsBit(plNetClientApp::kEchoVoice))
                //  pMsg.SetBit(plNetMessage::kEchoBackToSender);
                plNetClientApp::GetInstance()->SendMsg(&pMsg);
            
            }
            else  // use the speex voice compression lib
            {
                uint8_t *packet = new uint8_t[totalSamples];      // packet to send encoded data in
                int packedLength = 0;                                     // the size of the packet that will be sent
                hsRAMStream ram;                                          // ram stream to hold output data from speex
                uint8_t numFrames = totalSamples / EncoderFrameSize;        // number of frames to be encoded
                
                // encode the data using speex
                plSpeex::GetInstance()->Encode(buffer, numFrames, &packedLength, &ram);

                if (packedLength)
                {
                    // extract data from ram stream into packet
                    ram.Rewind();
                    ram.Read(packedLength, packet);
                    plNetMsgVoice pMsg;
                    pMsg.SetNetProtocol(kNetProtocolCli2Game);

                    pMsg.SetVoiceData((char *)packet, packedLength);
                    pMsg.SetPlayerID(plNetClientApp::GetInstance()->GetPlayerID());
                    pMsg.SetFlag(VOICE_ENCODED);    // Set encoded flag
                    pMsg.SetNumFrames(numFrames);
                    if (plNetClientApp::GetInstance()->GetFlagsBit(plNetClientApp::kEchoVoice))
                        pMsg.SetBit(plNetMessage::kEchoBackToSender);

                    plNetClientApp::GetInstance()->SendMsg(&pMsg);
                }
                delete[] packet;
            }
            delete[] buffer;
        }
        else if(!fMikeOpen)
        {
            short *buffer = new short[samples];
            // the mike has since closed, and there isn't enough data to meet our minimum, so throw this data out
            alcCaptureSamples(captureDevice, buffer, samples);      
            delete[] buffer;
        }
    }
}

plVoicePlayer::plVoicePlayer()
{
}

plVoicePlayer::~plVoicePlayer()
{
}

void plVoicePlayer::PlaybackUncompressedVoiceMessage(void* data, unsigned size)
{   
    if(fEnabled)
    {
        if(!fSound.IsPlaying())
        {
            fSound.Play();      
        }
        fSound.AddVoiceData(data, size);
    }
}

void plVoicePlayer::PlaybackVoiceMessage(void* data, unsigned size, int numFramesInBuffer)
{
    if(fEnabled)
    {
        int numBytes;               // the number of bytes that speex decompressed the data to. 
        int bufferSize = numFramesInBuffer * plSpeex::GetInstance()->GetFrameSize();
        short *nBuff = new short[bufferSize];
        memset(nBuff, 0, bufferSize);

        // Decode the encoded voice data using speex
        if(!plSpeex::GetInstance()->Decode((uint8_t *)data, size, numFramesInBuffer, &numBytes, nBuff))
        {
            delete[] nBuff;
            return;
        }
        
        uint8_t* newBuff;
        newBuff = (uint8_t*)nBuff;         // Convert to uint8_t data
        PlaybackUncompressedVoiceMessage(newBuff, numBytes);    // playback uncompressed data
        delete[] nBuff;
    }
}

void plVoicePlayer::SetVelocity(const hsVector3 vel)
{
    fSound.SetVelocity(vel);
}
     
void plVoicePlayer::SetPosition(const hsPoint3 pos)
{
    fSound.SetPosition(pos);
}
    
void plVoicePlayer::SetOrientation(const hsPoint3 pos)
{
    fSound.SetConeOrientation(pos.fX, pos.fY, pos.fZ);
}


/*****************************************************************************
*
*   plVoiceSound
*
***/
unsigned plVoiceSound::fCount = 0;

plVoiceSound::plVoiceSound() 
{
    fInnerCone = 90;
    fOuterCone = 240;
    fOuterVol = -2000;
    
    fMinFalloff = 15;
    fMaxFalloff = 75;

    fProperties = 0;
    fCurrVolume = 1.0;
    fDesiredVol = 1.0;

    fPriority = 1;
    fType = plgAudioSys::kVoice;

    fEAXSettings.SetRoomParams(-1200, -100, 0, 0);
    fLastUpdate = 0;

    plString keyName = plString::Format("VoiceSound_%d", fCount);
    fCount++;
    hsgResMgr::ResMgr()->NewKey(keyName, this, plLocation::kGlobalFixedLoc);
}

plVoiceSound::~plVoiceSound()
{
}

hsBool plVoiceSound::LoadSound( hsBool is3D )
{
    if( fFailed )
        return false;
    if( !plgAudioSys::Active() || fDSoundBuffer )
        return false;

    if( fPriority > plgAudioSys::GetPriorityCutoff() )
        return false;   // Don't set the failed flag, just return

    plWAVHeader header;
    header.fFormatTag = 0x1; // WAVE_FORMAT_PCM
    header.fBitsPerSample  = 16;
    header.fNumChannels = 1;
    header.fNumSamplesPerSec = FREQUENCY;
    header.fBlockAlign = header.fNumChannels * header.fBitsPerSample / 2;
    header.fAvgBytesPerSec = header.fNumSamplesPerSec * header.fBlockAlign;

    fDSoundBuffer = new plDSoundBuffer(0, header, true, false, false, true);
    if(!fDSoundBuffer)
        return false;
    fDSoundBuffer->SetupVoiceSource();
    
    IRefreshParams();
    IRefreshEAXSettings( true );
    fDSoundBuffer->SetScalarVolume(1.0);
    return true;
}

void plVoiceSound::Play()
{
    fPlaying = true;
    if( IWillBeAbleToPlay() )
    {
        IRefreshParams();
        SetVolume( fDesiredVol );
        IActuallyPlay();
    }
}

void plVoiceSound::IDerivedActuallyPlay( void )
{
    if( !fReallyPlaying )
    {
        fDSoundBuffer->Play(); 
        fReallyPlaying = true;
    }
}

void plVoiceSound::AddVoiceData(void *data, unsigned bytes)
{   
    unsigned size;
    unsigned bufferId;
    if(!fDSoundBuffer)
    {
        if(!LoadSound(true))
        {
            return;
        }
    }
    
    fDSoundBuffer->UnQueueVoiceBuffers();       // attempt to unque any buffers that have finished
    while(bytes > 0)
    {
        size = bytes < STREAM_BUFFER_SIZE ? bytes : STREAM_BUFFER_SIZE;
        if(!fDSoundBuffer->GetAvailableBufferId(&bufferId))
            break;      // if there isn't any room for the data, it is currently thrown out 

        fDSoundBuffer->VoiceFillBuffer(data, size, bufferId);
        bytes -= size;
    }
    fLastUpdate = hsTimer::GetMilliSeconds();
}

void plVoiceSound::Update()
{
    if(IsPlaying())
    {
        if((hsTimer::GetMilliSeconds() - fLastUpdate) > VOICE_STOP_MS)
        {
            Stop(); // terminating case for playback. Wait for x number of milliseconds, and stop.
        }
    }
}

void plVoiceSound::IRefreshParams()
{
    plSound::IRefreshParams();
}


/*****************************************************************************
*
*   Speex Voice Encoding/Decoding
*
***/

plSpeex::plSpeex() :
fBits(nil),
fEncoderState(nil),
fDecoderState(nil),
fSampleRate(plVoiceRecorder::GetSampleRate()),
fFrameSize(-1),
fQuality(7),
fVBR(true),                 // variable bit rate on     
fAverageBitrate(8000),      // 8kb bitrate
fComplexity(3),
fENH(false),
fInitialized(false)
{
    fBits = new SpeexBits;
    Init(kNarrowband);      // if no one initialized us initialize using a narrowband encoder
}

plSpeex::~plSpeex()
{
    Shutdown();
    delete fBits;
    fBits = nil;
}
    
hsBool plSpeex::Init(Mode mode) 
{
    int enh = 1;
    
    // setup speex
    speex_bits_init(fBits);
    fBitsInit = true;

    if(mode == kNarrowband)
    {
        fEncoderState = speex_encoder_init(speex_lib_get_mode(SPEEX_MODEID_NB));                         // narrowband
        fDecoderState = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_NB));
    }
    else if(mode == kWideband)
    {
        fEncoderState = speex_encoder_init(speex_lib_get_mode(SPEEX_MODEID_WB));
        fDecoderState = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_WB));
    }
    
    speex_encoder_ctl(fEncoderState, SPEEX_GET_FRAME_SIZE, &fFrameSize);            // get frame size
    speex_encoder_ctl(fEncoderState, SPEEX_SET_COMPLEXITY, &fComplexity);           // 3
    speex_encoder_ctl(fEncoderState, SPEEX_SET_SAMPLING_RATE, &fSampleRate);        // 8 khz
    speex_encoder_ctl(fEncoderState, SPEEX_SET_VBR_QUALITY, &fQuality);             // 7
    speex_encoder_ctl(fEncoderState, SPEEX_SET_VBR, &fVBR);                         // use variable bit rate
    speex_encoder_ctl(fEncoderState, SPEEX_SET_ABR, &fAverageBitrate);              // default to 8kb
    
    speex_decoder_ctl(fDecoderState, SPEEX_SET_ENH, &fENH);                         // perceptual enhancement               

    fInitialized = true;

    return true;
}

hsBool plSpeex::Shutdown()
{
    //shutdown speex
    if(fDecoderState)
    {
        speex_decoder_destroy(fDecoderState);
        fDecoderState = nil;
    }

    if(fEncoderState)
    {
        speex_encoder_destroy(fEncoderState);
        fEncoderState = nil;
    }

    if(fBitsInit)
    {
        speex_bits_destroy(fBits);
        fBitsInit = false;
    }
    fInitialized = false;

    return true;
}

hsBool plSpeex::Encode(short *data, int numFrames, int *packedLength, hsRAMStream *out)
{
    *packedLength = 0;
    
    short *pData = data;                        // pointer to input data
    float *input = new float[fFrameSize];       // input to speex - used as am intermediate array since speex requires float data
    uint8_t frameLength;                           // number of bytes speex compressed frame to
    uint8_t *frameData = new uint8_t[fFrameSize];     // holds one frame of encoded data
    
    // encode data
    for( int i = 0; i < numFrames; i++ )
    {
        // convert input data to floats
        for( int j = 0; j < fFrameSize; j++ )
        {
            input[j] = pData[j];
        }

        speex_bits_reset(fBits);                // reset bit structure

        // encode data using speex
        speex_encode(fEncoderState, input, fBits);
        frameLength = speex_bits_write(fBits, (char *)frameData, fFrameSize);

        // write data - length and bytes
        out->WriteLE(frameLength);
        *packedLength += sizeof(frameLength);   // add length of encoded frame                      
        out->Write(frameLength, frameData);
        *packedLength += frameLength;           // update length

        pData += fFrameSize;                    // move input pointer
    }
    
    delete[] frameData; 
    delete[] input;
    return true;
}

hsBool plSpeex::Decode(uint8_t *data, int size, int numFrames, int *numOutputBytes, short *out)
{
    if(!fInitialized) return false;
    *numOutputBytes = 0;

    hsReadOnlyStream stream( size, data );
    float *speexOutput = new float[fFrameSize];     // holds output from speex
    short *pOut = out;                              // pointer to output short buffer
    
    // create buffer for input data
    uint8_t *frameData = new uint8_t[fFrameSize];         // holds the current frames data to be decoded
    uint8_t frameLen;                                  // holds the length of the current frame being decoded.
    

    // Decode data
    for (int i = 0; i < numFrames; i++)
    {
        stream.ReadLE( &frameLen );           // read the length of the current frame to be decoded
        stream.Read( frameLen, frameData );     // read the data

        memset(speexOutput, 0, fFrameSize * sizeof(float));
        speex_bits_read_from(fBits, (char *)frameData, frameLen);   // give data to speex
        speex_decode(fDecoderState, fBits, speexOutput);                    // decode data 

        for(int j = 0; j < fFrameSize; j++)
        {
            pOut[j] = (short)(speexOutput[j]);          // convert floats to shorts
        }
        
        pOut += fFrameSize;                  
    }
    
    delete[] frameData;
    delete[] speexOutput;
    
    *numOutputBytes = (numFrames * fFrameSize) * sizeof(short);     // length of decoded voice data(out) in bytes
    if(*numOutputBytes == 0) 
        return false;

    return true;
}
        
// Sets variable bit rate on/off
void plSpeex::VBR(hsBool b)
{
    fVBR = b;
    speex_encoder_ctl(fEncoderState, SPEEX_SET_VBR, &fVBR);
}


// Sets the average bit rate
void plSpeex::SetABR(uint32_t abr) 
{
    fAverageBitrate = abr;
    speex_encoder_ctl(fEncoderState, SPEEX_SET_ABR, &fAverageBitrate); 
}

// Sets the quality of encoding
void plSpeex::SetQuality(uint32_t quality) 
{ 
    fQuality = quality;
    speex_encoder_ctl(fEncoderState, SPEEX_SET_QUALITY, &fQuality); 
}

void plSpeex::SetENH(hsBool b)
{
    fENH = b;
    speex_decoder_ctl(fDecoderState, SPEEX_SET_ENH, &fENH); 
}

void plSpeex::SetComplexity(uint8_t c)
{
    fComplexity = c;
    speex_encoder_ctl(fEncoderState, SPEEX_SET_COMPLEXITY, &fComplexity);   
}
