/*

* Copyright (c) 2006-2009 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:

*

*/

#ifndef RMMFDEVSOUNDPROXY_H

#define RMMFDEVSOUNDPROXY_H

//  INCLUDES

#include <mmf/common/mmfipc.h>

#ifdef SYMBIAN_ENABLE_SPLIT_HEADERS

#include <mmf/common/mmfipcserver.h>

#endif

#include <mmf/common/mcustomcommand.h>

#include "mmfdevsoundcallbackhandler.h"

#include "mmfaudioserverproxy.h"

_LIT(KMMFDevSoundProxyPanicCategory, "MmfDevSoundProxy");

enum TMMFDevSoundProxyPanicCodes

	{

	EMMFDevSoundProxyPlayDataWithoutInitialize,

	EMMFDevSoundProxyRecordDataWithoutInitialize,

	EMMFDevSoundProxyInitCompleteInWrongState,

	EMMFDevSoundProxyToneFinishedInWrongState,

	EMMFDevSoundProxyPlayErrorInWrongState,

	EMMFDevSoundProxyRecordErrorInWrongState,

	EMMFDevSoundProxyUnexpectedConvError,

	EMMFDevSoundProxyCapabilitiesInWrongState,

	EMMFDevSoundProxyConfigInWrongState,

	EMMFDevSoundProxyBTBFInWrongState,

	EMMFDevSoundProxyBTBEInWrongState,

	EMMFDevSoundProxyPlayDataInWrongState,

	EMMFDevSoundProxyRecordDataInWrongState,

	EMMFDevSoundProxyNonEmptyLastBuffer,

	};

// FORWARD DECLARATIONS

class RMMFDevSoundProxy; // declared here.

// CLASS DECLARATION

/**

*  Main interface to DevSound server.

*

*  @lib MmfDevSoundProxy.lib

*  @since 

*/

NONSHARABLE_CLASS( RMMFDevSoundProxy ) : public RMmfSessionBase, 

										 public MCustomCommand,

										 public MDevSoundObserver,

										 public MMMFDevSoundCancelInitialize

	{

public:  // Constructors and destructor

	/**

	* Constructor.

	* @since 

	*/

	IMPORT_C RMMFDevSoundProxy();

public: // New functions

	/**

	* Open a DevSound server session

	* @since 

	* @return KErrNone if successfull, else corresponding error code

	*/

	IMPORT_C TInt Open();

	/**

	* Post open - called following successful open to complete open process.

	* Allows async opening

	* @return KErrNone successful, otherwise one of the standard system errors

	*/

	IMPORT_C TInt PostOpen(); 

	/**

	* Launch DevSound instances that might have been waiting for audio

	* policy.

	* @since 

	* @return KErrNone if successfull, else corresponding error code

	*/

	IMPORT_C TInt SetDevSoundInfo();

	/**

	* Initialize DevSound for the mode aMode.

	* Leaves on failure.

	* @since 

	* @param TMMFState aMode The mode for which this object will be used

	* @param aDevSoundCIObserver Observer which will receive Custom Interface events

	* 

	*/

	IMPORT_C void InitializeL(MDevSoundObserver& aDevSoundObserver,

	                          TMMFState aMode,

	                          MMMFDevSoundCustomInterfaceObserver& aDevSoundCIObserver);

	/**

	* Initializes DevSound object for the mode aMode for processing audio

	* data with hardware device aHWDev.

	* Leaves on failure.

	* @since 

	* @param TUid aHWDev The CMMFHwDevice implementation identifier.

	* @param TMMFState aMode The mode for which this object will be used

	* @param aDevSoundCIObserver Observer which will receive Custom Interface events

	* 

	*/

	IMPORT_C void InitializeL(MDevSoundObserver& aDevSoundObserver,

	                          TUid aHWDev,

	                          TMMFState aMode,

	                          MMMFDevSoundCustomInterfaceObserver& aDevSoundCIObserver);

	/**

	* Initializes DevSound object for the mode aMode for processing audio

	* data with hardware device supporting FourCC aDesiredFourCC.

	* Leaves on failure.

	* @since 

	* @param TFourCC aDesiredFourCC The CMMFHwDevice implementation FourCC

	*        code.

	* @param TMMFState aMode The mode for which this object will be used

	* @param aDevSoundCIObserver Observer which will receive Custom Interface events

	* 

	*/

	IMPORT_C void InitializeL(MDevSoundObserver& aDevSoundObserver,

	                          TFourCC aDesiredFourCC,

	                          TMMFState aMode,

	                          MMMFDevSoundCustomInterfaceObserver& aDevSoundCIObserver);

	/**

	* Returns the supported Audio settings ie. encoding, sample rates,

	* mono/stereo operation, buffer size etc..

	* @since 

	* @return TMMFCapabilities The device settings.

	*/

	IMPORT_C TMMFCapabilities Capabilities();

	/**

	* Returns the current device configuration.

	* @since 

	* @return TMMFCapabilities The device settings.

	*/

	IMPORT_C TMMFCapabilities Config();

	/**

	* Configure CMMFDevSound object with the settings in aConfig. Use this

	* to set sampling rate, encoding and mono/stereo.

	* Leaves on failure.

	* @since 

	* @param const TMMFCapabilities& aConfig The attribute values to which

	*        CMMFDevSound object will be configured to.

	* @return KErrNone if successfull, else corresponding error code

	*/

	IMPORT_C void SetConfigL(const TMMFCapabilities& aConfig);

	/**

	* Returns an integer representing the maximum volume device supports.

	* This is the maximum value which can be passed to

	* CMMFDevSound::SetVolume.

	* @since 

	* @return TInt The maximum volume. This value is platform dependent but

	*        is always greater than or equal to one.

	*/

	IMPORT_C TInt MaxVolume();

	/**

	* Returns an integer representing the current volume.

	* @since 

	* @return TInt The current volume level.

	*/

	IMPORT_C TInt Volume();

	/**

	* Changes the current playback volume to a specified value. The volume

	* can be changed before or during playback and is effective immediately

	* @since 

	* @param TInt aVolume The volume setting. This can be any value from 0

	*        to the value returned by a call to

	*        CMMFDevSound::MaxVolume(). If the volume is not

	*        within this range, the volume is automatically set

	*        to minimum or maximum value based on the value

	*        that is being passed. Setting a zero value mutes

	*        the sound. Setting the maximum value results in

	*        the loudest possible sound.

	* @return KErrNone if successfull, else corresponding error code

	*/

	IMPORT_C TInt SetVolume(TInt aVolume);

	/**

	* Returns an integer representing the maximum gain the device supports.

	* This is the maximum value which can be passed to CMMFDevSound::SetGain

	* @since 

	* @return TInt The maximum gain. This value is platform dependent but is

	*        always greater than or equal to one.

	*/

	IMPORT_C TInt MaxGain();

	/**

	* Returns an integer representing the current gain.

	* @since 

	* @return TInt The current gain level.

	*/

	IMPORT_C TInt Gain();

	/**

	* Changes the current recording gain to a specified value. The gain can

	* be changed before or during recording and is effective immediately.

	* @since 

	* @param TInt aGain The gain setting. This can be any value from zero to

	*        the value returned by a call to

	*        CMMFDevSound::MaxGain(). If the volume

	*        is not within this range, the gain is automatically

	*        set to minimum or maximum value based on the value

	*        that is being passed. Setting a zero value mutes the

	*        sound. Setting the maximum value results in the

	*        loudest possible sound.

	* @return KErrNone if successfull, else corresponding error code

	*/

	IMPORT_C TInt SetGain(TInt aGain);

	/**

	* Returns the speaker balance set for playing.

	* Leaves on failure.

	* @since 

	* @param TInt &aLeftPercentage On return contains the left speaker

	*        volume percentage.

	* @param TInt &aRightPercentage On return contains the right speaker

	*        volume percentage.

	*/

	IMPORT_C void GetPlayBalanceL(TInt& aLeftPercentage,

	                              TInt& aRightPercentage);

	/**

	* Sets the speaker balance for playing. The speaker balance can be

	* changed before or during playback and is effective immediately.

	* Leaves on failure.

	* @since 

	* @param TInt aLeftPercentage The left speaker volume percentage. This

	*        can be any value from zero to 100. Setting

	*        a zero value mutes the sound on left

	*        speaker.

	* @param TInt aRightPercentage The right speaker volume percentage.

	*        This can be any value from zero to 100.

	*        Setting a zero value mutes the sound on

	*        right speaker.

	*/

	IMPORT_C void SetPlayBalanceL(TInt aLeftPercentage,

	                              TInt aRightPercentage);

	/**

	* Returns the microphone gain balance set for recording.

	* Leaves on failure.

	* @since 

	* @param TInt &aLeftPercentage On return contains the left microphone

	*        gain percentage.

	* @param TInt &aRightPercentage On return contains the right microphone

	*        gain percentage.

	* @return void

	*/

	IMPORT_C void GetRecordBalanceL(TInt& aLeftPercentage,

	                                TInt& aRightPercentage);

	/**

	* Sets the microphone balance for recording. The microphone balance can

	* be changed before or during recording and is effective immediately.

	* Leaves on failure.

	* @since 

	* @param TInt aLeftPercentage The left microphone gain percentage. This

	*        can be any value from zero to 100. Setting

	*        a zero value mutes the sound from left

	*        microphone.

	* @param TInt aRightPercentage The right microphone gain percentage.

	*        This can be any value from zero to 100.

	*        Setting a zero value mutes the sound from

	*        right microphone.

	* @return void

	*/

	IMPORT_C void SetRecordBalanceL(TInt aLeftPercentage,

	                                TInt aRightPercentage);

	/**

	* Close the server session

	* @since 

	* @return void

	*/

	IMPORT_C void Close();

	/**

	* Initializes the audio device and starts the play process. This

	* function queries and acquires the audio policy before initializing

	* audio device. If there was an error during policy initialization,

	* PlayError() function will be called on the observer with error code

	* KErrAccessDenied, otherwise BufferToBeFilled() function will be called

	* with a buffer reference. After reading data into the buffer reference

	* passed, the client should call PlayData() to play data.

	* The amount of data that can be played is specified in

	* CMMFBuffer::RequestSize(). Any data that is read into buffer beyond

	* this size will be ignored.

	* Leaves on failure.

	* @since 

	* @return void

	*/

	IMPORT_C void PlayInitL();

	/**

	* Initializes the audio device and starts the record process. This

	* function queries and acquires the audio policy before initializing

	* audio device. If there was an error during policy initialization,

	* RecordError() function will be called on the observer with error code

	* KErrAccessDenied, otherwise BufferToBeEmptied() function will be called

	* with a buffer reference. This buffer contains recorded or encoded

	* data. After processing data in the buffer reference passed, the client

	* should call RecordData() to continue recording process.

	* The amount of data that is available is specified in

	* CMMFBuffer::RequestSize().

	* Leaves on failure.

	* @since 

	* @return void

	*/

	IMPORT_C void RecordInitL();

	/**

	* Plays data in the buffer at the current volume.

	* The client should fill the buffer with audio data before calling this

	* function. The observer gets a reference to the buffer along with the

	* callback function BufferToBeFilled(). When playing of the audio sample

	* is complete, successfully or otherwise, the function PlayError() on

	* the observer is called.

	* The last buffer of the audio stream being played should have the last

	* buffer flag set using CMMFBuffer::SetLastBuffer(TBool). If a

	* subsequent attempt to play the clip is made, this flag will need

	* resetting by the client.

	* @return void

	*/

	IMPORT_C void PlayData();

	/**

	* Contine the process of recording.

	* Once the buffer is filled with recorded data, the Observer gets a

	* reference to the buffer along with the callback function

	* BufferToBeEmptied(). After processing the buffer (copying over to a

	* different buffer or writing to file) the client should call this

	* function to continue the recording process.

	* @return void

	*/

	IMPORT_C void RecordData();

	/**

	* Stops the ongoing operation (Play, Record, TonePlay).

	* @since 

	* @return void

	*/

	IMPORT_C void Stop();

	/**

	* Temporarily Stops the ongoing operation (Play, Record, TonePlay).

	* @since 

	* @return void

	*/

	IMPORT_C void Pause();

	/**

	* Initializes the audio device and starts playing a tone. The tone is

	* played with the frequency and duration specified.

	* Leaves on failure.

	* @since 

	* @param TInt aFrequency The frequency at which the tone will be played.

	* @param const TTimeIntervalMicroSeconds &aDuration The period over

	*        which the tone will be played. A zero value causes the no tone

	*        to be played.

	* @return void

	*/

	IMPORT_C void PlayToneL(TInt aFrequency,

	                        const TTimeIntervalMicroSeconds& aDuration);

	/**

	* Initializes audio device and starts playing a dual tone. Dual Tone is

	* played with the specified frequencies and for the specified duration.

	* Leaves on failure.

	* @since 

	* @param TInt aFrequencyOne The first frequency of dual tone.

	* @param TInt aFrequencyTwo The second frequency of dual tone.

	* @param const TTimeIntervalMicroSeconds &aDuration The period over

	*        which the tone will be played. A zero value causes the no tone

	*        to be played.

	* @return void

	*/

	IMPORT_C void PlayDualToneL(

	              TInt aFrequencyOne,

	              TInt aFrequencyTwo,

	              const TTimeIntervalMicroSeconds& aDuration);

	/**

	* Initializes the audio device and starts playing the DTMF string

	* aDTMFString.

	* Leaves on failure.

	* @since 

	* @param const TDesC &aDTMFString The DTMF sequence in a descriptor.

	* @return void

	*/

	IMPORT_C void PlayDTMFStringL(const TDesC& aDTMFString);

	/**

	* Initializes the audio device and starts playing a tone sequence.

	* Leaves on failure.

	* @since 

	* @param const TDesC8 &aData The tone sequence in a descriptor.

	* @return void

	*/

	IMPORT_C void PlayToneSequenceL(const TDesC8& aData);

	/**

	* Defines the duration of tone on, tone off and tone pause to be used

	* during the DTMF tone playback operation.

	* Supported only during tone playing.

	* @since 

	* @param TTimeIntervalMicroSeconds32 &aToneOnLength The period over

	*        which the tone will be played. If this is set to zero, then the

	*        tone is not played.

	* @param TTimeIntervalMicroSeconds32 &aToneOffLength The period over

	*        which the no tone will be played.

	* @param TTimeIntervalMicroSeconds32 &aPauseLength The period over which

	*        the tone playing will be paused.

	* @return void

	*/

	IMPORT_C void SetDTMFLengths(

	              TTimeIntervalMicroSeconds32& aToneOnLength,

	              TTimeIntervalMicroSeconds32& aToneOffLength,

	              TTimeIntervalMicroSeconds32& aPauseLength);

	/**

	* Defines the period over which the volume level is to rise smoothly

	* from nothing to the normal volume level.

	* The function is only available before playing.

	* @since 

	* @param const TTimeIntervalMicroSeconds &aRampDuration The period over

	*        which the volume is to rise. A zero value causes the tone

	*        sample to be played at the normal level for the full duration

	*        of the playback. A value, which is longer than the duration of

	*        the tone sample means that the sample never reaches its normal

	*        volume level.

	* @return void

	*/

	IMPORT_C void SetVolumeRamp(

	              const TTimeIntervalMicroSeconds& aRampDuration);

	/**

	* Returns a list of the supported input datatypes that can be sent to

	* DevSound for playing audio. The datatypes returned are those that the

	* DevSound supports given the priority settings passed in

	* aPrioritySettings. Note that if no supported data types are found this

	* does not constitute failure, the function will return normally with no

	* entries in aSupportedDataTypes.

	* @since 

	* @param RArray< TFourCC > &aSupportedDataTypes The array of supported

	*        data types that will be filled in by this function. The

	*        supported data types of the DevSound are in the form of an

	*        array of TFourCC codes. Any existing entries in the array will

	*        be overwritten on calling this function. If no supported data

	*        types are found given the priority settings, then the

	*        aSupportedDatatypes array will have zero entries.

	* @param const TMMFPrioritySettings &aPrioritySettings The priority

	*        settings used to determine the supported datatypes. Note this

	*        does not set the priority settings. For input datatypes the

	*        iState member of the priority settings would be expected to be

	*        either EMMFStatePlaying or EMMFStatePlayingRecording. The

	*        priority settings may effect the supported datatypes depending

	*        on the audio routing.

	* @return void

	*/

	IMPORT_C void GetSupportedInputDataTypesL(

	              RArray<TFourCC>& aSupportedDataTypes,

	              const TMMFPrioritySettings& aPrioritySettings);

	/**

	* Returns a list of the supported output dataypes that can be received

	* from DevSound for recording audio. The datatypes returned are those

	* that the DevSound supports given the priority settings passed in

	* aPrioritySettings. Note that if no supported data types are found this

	* does not constitute failure, the function will return normally with no

	* entries in aSupportedDataTypes.

	* @since 

	* @param RArray< TFourCC > &aSupportedDataTypes The array of supported

	*        data types that will be filled in by this function. The

	*        supported datatypes of the DevSound are in the form of an array

	*        of TFourCC codes. Any existing entries in the array will be

	*        overwritten on calling this function. If no supported datatypes

	*        are found given the priority settings, then the

	*        aSupportedDatatypes array will have zero entries.

	* @param const TMMFPrioritySettings &aPrioritySettings The priority

	*        settings used to determine the supported data types. Note this

	*        does not set the priority settings. For output data types the

	*        iState member of the priority settings would expected to be

	*        either EMMFStateRecording or EMMFStatePlayingRecording. The

	*        priority settings may effect the supported datatypes depending

	*        on the audio routing.

	* @return void

	*/

	IMPORT_C void GetSupportedOutputDataTypesL(

	              RArray<TFourCC>& aSupportedDataTypes,

	              const TMMFPrioritySettings& aPrioritySettings);

	/**

	* Returns the number samples recorded so far.

	* @since 

	* @return TInt The samples recorded.

	*/

	IMPORT_C TInt SamplesRecorded();

	/**

	* Returns the number samples played so far.

	* @since 

	* @return TInt The samples played.

	*/

	IMPORT_C TInt SamplesPlayed();