/*

* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  Class for producing audio feedback.

* Part of:      Tactile Feedback.

*

*/

#include <e32debug.h>

#include <centralrepository.h>

#include <ecom/implementationproxy.h>

#include <mda/common/audio.h>

#include <mdaaudiooutputstream.h>

#include "tactilefeedbackprivatecrkeys.h"

#include "tactilefeedbacktrace.h"

#include "tactileaudioplayer.h"

#include "OstTraceDefinitions.h"

#ifdef OST_TRACE_COMPILER_IN_USE

#include "tactileaudioplayerTraces.h"

#endif

const TInt KRiffHeaderSize = 44;

_LIT8( KRiff, "RIFF" );

_LIT8( KWave, "WAVE" );

_LIT8( KFmt,  "fmt " );

_LIT8( KData, "data" );

// ---------------------------------------------------------------------------

// Constructor.

// ---------------------------------------------------------------------------

//

CTactileAudioPlayer::CTactileAudioPlayer( CRepository& aRepository ):

    iRepository( aRepository )

    {

    }

// ---------------------------------------------------------------------------

// 2nd phase constructor.

// ---------------------------------------------------------------------------

//

void CTactileAudioPlayer::ConstructL()

    {

    TRACE("CTactileAudioPlayer::ConstructL()");

    ReadSettingsL();

    CreateWavPlayerL();

    iCenRepNotifier = CCenRepNotifyHandler::NewL( *this, 

                                                  iRepository, 

                                                  CCenRepNotifyHandler::EIntKey,

                                                  KTactileFeedbackAudioVolume );

    iCenRepNotifier->StartListeningL(); 

    TRACE("CTactileAudioPlayer::ConstructL() - end");

    }

// ---------------------------------------------------------------------------

// 2-phased constructor.

// ---------------------------------------------------------------------------

//

CTactileAudioPlayer* CTactileAudioPlayer::NewL( CRepository& aRepository )

    {

    CTactileAudioPlayer* self = 

        new ( ELeave ) CTactileAudioPlayer( aRepository );

    CleanupStack::PushL( self );

    self->ConstructL( );

    CleanupStack::Pop( self );

    return self;

    }

// ---------------------------------------------------------------------------

// Destructor.

// ---------------------------------------------------------------------------

//

CTactileAudioPlayer::~CTactileAudioPlayer()

    {

    if ( iAudioPlayer )

        {

        iAudioPlayer->Stop();

        delete iAudioPlayer;

        }

    delete iCenRepNotifier;

    delete iSensitiveSample;

    delete iBasicSample;

    delete iSensitiveFileName;

    delete iBasicFileName;

    iVolumeLevels.Close();

    }

// ---------------------------------------------------------------------------

// From class CTactilePlayer

//

// Currently we only select volume level according to logical feedback type

// (i.e. the .wav -file cannot be selected separately for each logical

// feedback type).

//

// We don't do anything in case volume level has been set to zero for the

// given feedback type (this way e.g. dragging feedback can be disabled

// totally if that is wanted).

//

// Notice that currently the ETouchFeedbackSensitive -feedback is a bit

// troublesome: Even though we have our own thread for feedback playing,

// it still lags behind when something is dragged on screen. Final solution

// may be to configure audio .wav dragging feedback OFF, and use audio

// tone for dragging instead.

// ---------------------------------------------------------------------------

//

TInt CTactileAudioPlayer::PlayFeedback( TTouchLogicalFeedback aFeedback )

    {

    TRACE2( "CTactileAudioPlayer::PlayFeedback( %d )", aFeedback );

    TInt volumeIndex(0);

    switch ( aFeedback )

        {

        case ETouchFeedbackBasic:               // flow through

        case ETouchFeedbackBasicButton:         // flow through

        case ETouchFeedbackLineSelection:       // flow through

        case ETouchFeedbackBlankSelection:      // flow through

        case ETouchFeedbackTextSelection:       // flow through

        case ETouchFeedbackEmptyLineSelection:  // flow through

        case ETouchFeedbackPopUp:               // flow through

        case ETouchFeedbackCheckbox:            // flow through

            volumeIndex = 0;

            break;

        case ETouchFeedbackSensitive:           // flow through

        case ETouchFeedbackSensitiveButton:     // flow through

            volumeIndex = 1;

            break;

        default:

            // should not be there at all

            TRACE2( "CTactileAudioPlayer::PlayFeedback - %d is not a feedback type - returning", aFeedback );

            break;

        }

    if ( volumeIndex <= iVolumeLevels.Count() &&

         iVolumeLevels[volumeIndex] > 0 &&

         iAudioPlayer )

        {

        switch ( iState )

            {

            case ETactileAudioInitialising:

                // can't play anything yet

                break;

            case ETactileAudioPlaying: // fall trough

            case ETactileAudioReady:

                OstTrace1( TACTILE_PERFORMANCE, TACTILE_PLAY_AUDIO_FEEDBACK_1,

                                "e_TACTILE_PLAY_AUDIO_FEEDBACK 1 0x%x", aFeedback );

                if ( aFeedback == ETouchFeedbackBasic )

                    {

                    TRAP_IGNORE( iAudioPlayer->WriteL( *iBasicSample ) );

                    }

                else

                    {

                    TRAP_IGNORE( iAudioPlayer->WriteL( *iSensitiveSample ) );

                    }                    

                OstTrace1( TACTILE_PERFORMANCE, TACTILE_PLAY_AUDIO_FEEDBACK_0,

                                "e_TACTILE_PLAY_AUDIO_FEEDBACK 0 0x%x", aFeedback );

                iState = ETactileAudioPlaying;

                break;

            case ETactileAudioError: 

                break;

            default:

                // should not be here

                TRACE("CTactileAudioPlayer::PlayFeedback - error with audio device");

                break;

            }

        }

    else 

        {

        if ( !iAudioPlayer )

            {

            TRACE("CTactileAudioPlayer::PlayFeedback - iAudioPlayer is NULL!");

            }

        else

            {

            TRACE("CTactileAudioPlayer::PlayFeedback - volume levels not ok");

            }

        }

    TRACE2( "CTactileAudioPlayer::PlayFeedback( %d ) - end", aFeedback );

    return KErrNone;

    }

// ---------------------------------------------------------------------------

//

// ---------------------------------------------------------------------------

//    

TInt CTactileAudioPlayer::PlayPreviewFeedback( TInt aLevel, 

                                             TTouchLogicalFeedback aFeedback )    

    {

    TRACE("CTactileAudioPlayer::PlayPreviewFeedback - Begin");

    TInt ret( KErrArgument );

    iOriginalVolume = iCurrentVolume;

    iCurrentVolume = aLevel;

    iAudioPlayer->SetVolume( ScaledVolume() );

    ret = PlayFeedback( aFeedback );

    iCurrentVolume = iOriginalVolume;

    iAudioPlayer->SetVolume( ScaledVolume() );

    TRACE("CTactileAudioPlayer::PlayPreviewFeedback - End");

    return ret;    

    }    

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CTactileAudioPlayer::MaoscOpenComplete( TInt aError )

    {

    if ( aError == KErrNone ) 

        {

        iCurrentVolume = iVolumeLevels[0];

        iMaxRawVolume = iAudioPlayer->MaxVolume();

        iRepository.Get( KTactileFeedbackAudioVolume, iCurrentVolume );

        iAudioPlayer->SetVolume( ScaledVolume() );

        TRAP_IGNORE( iAudioPlayer->SetDataTypeL( KMMFFourCCCodePCM16 ) );

        iState = ETactileAudioReady;        

        }

    else 

        {

        TRACE2("CTactileAudioPlayer::MaoscOpenComplete( %d ) failed, will not play feedback", aError );

        delete iAudioPlayer;

        iAudioPlayer = NULL;

        iState = ETactileAudioError;

        }

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CTactileAudioPlayer::MaoscPlayComplete( TInt aError )

    {

    TRACE("CTactileAudioPlayer::MaoscPlayComplete - Begin");

    iAudioPlayer->Stop();

    if ( aError == KErrCorrupt )

        {

        TRACE2("CTactileAudioPlayer::MaoscPlayComplete( %d ) failed, will not play feedback", aError );

        delete iAudioPlayer;

        iAudioPlayer = NULL;

        iState = ETactileAudioError;        

        }

    else

        {   

        iState = ETactileAudioReady;

        }            

    TRACE("CTactileAudioPlayer::MaoscPlayComplete - End");

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//    

void CTactileAudioPlayer::MaoscBufferCopied( TInt aError, const TDesC8& /*aBuffer*/ )

    {

    if ( !aError )

        {

        iState = ETactileAudioReady; // may write another sample

        }

    else

        {

        TRACE2("CTactileAudioPlayer::MaoscPlayComplete( %d ) failed", aError);

        }

    }

// ---------------------------------------------------------------------------

// Settings are now not read completely, as only the .wav -file of basic

// feedback is read, and same file is used for sensitive feedback. 

// Using of separate files for basic and sensitive feedback 

// can be added later in case necessary.

// ---------------------------------------------------------------------------

//

void CTactileAudioPlayer::ReadSettingsL()

    {

    TRACE("CTactileAudioPlayer::ReadSettingsL - Begin");

    iVolumeLevels.Reset();

    delete iSensitiveFileName;

    iSensitiveFileName = NULL;

    delete iBasicFileName;

    iBasicFileName = NULL;

    iSensitiveFileName = HBufC::NewL( KMaxFileName );    

    TPtr sensitiveFileName = iSensitiveFileName->Des();

    iBasicFileName = HBufC::NewL( KMaxFileName );    

    TPtr basicFileName = iBasicFileName->Des();

    TInt basicVolumeLevel = 0;

    TInt sensitiveVolumeLevel = 0;

    // Read volume values for level 2

    iRepository.Get( KTactileAudioWavVolumeBasicLevel2, basicVolumeLevel );

    iRepository.Get( KTactileAudioWavVolumeSensitiveLevel2, sensitiveVolumeLevel );

    // Read file names

    iRepository.Get( KTactileAudioWavFileBasicLevel2, basicFileName );

    iRepository.Get( KTactileAudioWavFileSensitiveLevel2, sensitiveFileName );

    iVolumeLevels.Append( basicVolumeLevel );

    iVolumeLevels.Append( sensitiveVolumeLevel );

    TRACE("CTactileAudioPlayer::ReadSettingsL() - End");

    }

// ---------------------------------------------------------------------------

// ScaledVolume()

// return 100% scaled & sanity checked volume value

// ---------------------------------------------------------------------------

//

TInt CTactileAudioPlayer::ScaledVolume()

    {

    if ( iMaxRawVolume == KErrNotFound )

        {

        TRACE( "CTactileAudioPlayer::ScaledVolume() Audio Hardware is not initialized properly" );

        return 0;

        }

    TInt volume = iMaxRawVolume * iCurrentVolume / 100;

    if ( volume > iMaxRawVolume )

        {

        // sanity check, we might get anything from cenrep

        volume = iMaxRawVolume;

        }

    TRACE4( "CTactileAudioPlayer::ScaledVolume() iCurrentVolume:%d scales volume to:%d out of iMaxRawVolume:%d",

        iCurrentVolume, volume, iMaxRawVolume );

    return volume;

    }

/*

* Wave file structure: Riff header + Wave format chunk + Wave data chunk

* 

* Riff header:

* ==================================================

* Offset Size Description      Value

* 0x00      4 Chunk ID         "RIFF"

* 0x04      4 Chunk Data Size  ( file size ) - 8

* 0x08      4 RIFF Type        "WAVE"

* 0x0c      *  Wave chunks *

*

* Wave Format Chunk:

* ==================================================

* Offset Size Description      Value

* 0x00      4 Chunk ID         "fmt "

* 0x04      4 Chunk Data Size  16 + extra format bytes ( 0 for normal wav files)

* 0x08      2 Compression code 1...65535               ( 1 for PCM uncompressed)

* 0x0a      2 Nbr of channels  1...65535

* 0x0c      4 Sample rate      1...0xFFFFFFFF

* 0x10      4 Average bytes per sec

* 0x14      2 block align

* 0x16      2 siginificant bits per sample

* 0x18      2 extra format bytes 0...65535

* 0x1a        * extra format bytes, if any *

*

* Wave Data Chunk:

* ==================================================

* Offset Size Description      Value

* 0x00      4 Chunk ID         "data"

* 0x04      4 Chunk data size  

* 0x08        * sample data *

*

*/

void CTactileAudioPlayer::ReadSampleL( RFile& aFile, 

                                       HBufC8*& aDes, 

                                       TUint& aChannels, 

                                       TUint& aSampleRate )

    {

    TRACE("CTactileAudioPlayer::ReadSampleL - Start");

    const TInt fmtOffset  = 0x0c;

    const TInt dataOffset = fmtOffset + 0x18;

    TBuf8<KRiffHeaderSize> header;

    TInt err = aFile.Read( header, KRiffHeaderSize );

    if ( err )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL: reading from file failed, aborting");

        User::Leave( err );

        }

    TPtr8 p = header.LeftTPtr( 4 );

    if ( p.Compare( KRiff ) )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL: no RIFF header found, aborting" );

        User::Leave( KErrCorrupt );

        }

    p = header.MidTPtr( 0x08, 4 );

    if ( p.Compare( KWave ) )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL:  not a WAVE file, aborting" );

        User::Leave( KErrCorrupt );

        }

    p = header.MidTPtr( fmtOffset + 0x00, 4 );

    if ( p.Compare( KFmt ) )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL:  no 'fmt ' chunk found, aborting" );

        User::Leave( KErrCorrupt );

        }

    p = header.MidTPtr( dataOffset, 4 );

    if ( p.Compare( KData ) )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL:  no 'data' chunk found, aborting" );

        User::Leave( KErrCorrupt );

        }

    TUint8 lo = header[ fmtOffset + 0x08 ];

    TUint8 hi = header[ fmtOffset + 0x08 + 1 ];

    if ( !( lo == 1 && hi == 0) )

        {

        TRACE("CTactileAudioPlayer::ReadSampleL: non PCM wav not supported, aborting" );

        User::Leave( KErrNotSupported );

        }

    lo = header[ fmtOffset + 0x0a ];

    hi = header[ fmtOffset + 0x0a + 1 ];

    aChannels = lo;

    if ( !(aChannels == 1 || aChannels == 2 && hi == 0) )

        {

        TRACE2("CTactileAudioPlayer::ReadSampleL: unsupported number of channels ( %d ), aborting", aChannels );

        User::Leave( KErrNotSupported );

        }

    aSampleRate = 0;

    for ( TInt i = 0; i < 4; i++ )

        {

        lo = header[ fmtOffset + 0x0c + i ];

        TUint32 tmp = lo;

        tmp = tmp << i * 8;

        aSampleRate = aSampleRate | tmp;

        }

    lo = header[ fmtOffset + 0x16 ];

    hi = header[ fmtOffset + 0x16 + 1 ];

    TUint16 bitsPerSample = hi;

    bitsPerSample = bitsPerSample << 8;

    bitsPerSample = bitsPerSample | lo;

    if ( bitsPerSample != 16 )

        {

        TRACE2("CTactileAudioPlayer::ReadSampleL:  %d bits per sample not supported", bitsPerSample );

        User::Leave( KErrNotSupported );

        }

    TUint32 bytesPerSample = bitsPerSample / 8;

    // how many bytes for 6 ms

    TUint bytesNeeded = ( aSampleRate * aChannels * bytesPerSample * 6 ) / 1000;

    TInt fsize( 0 );

    if ( aFile.Size( fsize ) == KErrNone && fsize >= bytesNeeded + KRiffHeaderSize )

        {

        aDes = HBufC8::NewL( bytesNeeded );

        TPtr8 des = aDes->Des();

        aFile.Read( des, bytesNeeded );

        }

    else

        {

        TRACE("CTactileAudioPlayer::ReadSampleL: Less than 6ms content in file, aborting" );

        User::Leave( KErrNotSupported );

        }

    TRACE3("CTactileAudioPlayer::ReadSampleL %dHz %dchannel sample read successfully - End", 

        iSampleRate, iChannels);

    }

// ---------------------------------------------------------------------------

// Audio data reading from file and creation of the actual player utility.

//

// Rest of the initializations are done in MapcInitComplete -function.

//

// Notice that CMdaAudioOutputStream usage is not a good idea, as it

// buffers samples until buffer is full and flushes all in a row. Result is 

// no feedback first, then a machine gun burst at some completely 

// unrelated moment. 

// ---------------------------------------------------------------------------

//

void CTactileAudioPlayer::CreateWavPlayerL()

    {