baseport/syborg/soundsc/shared_txsound.cpp
changeset 45 01c1ffcc4fca
parent 23 8374da225e88
child 72 d00bf4f57250
equal deleted inserted replaced
44:72a7468afdd4 45:01c1ffcc4fca
     1 /*
     1 /*
     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
     2 * This component and the accompanying materials are made available
     5 * under the terms of the License "Eclipse Public License v1.0"
     3 * under the terms of the License "Eclipse Public License v1.0"
     6 * which accompanies this distribution, and is available
     4 * which accompanies this distribution, and is available
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
     5 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
     8 *
     6 *
     9 * Initial Contributors:
     7 * Initial Contributors:
    10 * Nokia Corporation - initial contribution.
     8 * Nokia Corporation - initial contribution.
    11 *
     9 *
    12 * Contributors:
    10 * Contributors:
       
    11 * Accenture Ltd
    13 *
    12 *
    14 * Description:
    13 * Description: This file is a part of sound driver for Syborg adaptation.
    15 *
    14 *
    16 */
    15 */
    17 
    16 
    18 #include "shared_sound.h"
    17 #include "shared_sound.h"
    19 #include "variant_sound.h"
    18 #include "variant_sound.h"
    20 
    19 #include "../specific/syborg.h"
    21 void TimerCallback(TAny* aData)
    20 
    22 	{
    21 #include "virtio.h"
    23 	DDriverSyborgSoundScPdd * soundscpdd = (DDriverSyborgSoundScPdd*) aData;
    22 #include "virtio_audio.h"
       
    23 #include "virtio_iohandler.h"
       
    24 
       
    25 using namespace VirtIo;
       
    26 
       
    27 static TInt GetSampleRate( TSoundRate aRate)
       
    28 	{
       
    29 	switch(aRate)
       
    30 		{
       
    31 		case ESoundRate7350Hz: 	return 7350;
       
    32 		case ESoundRate8000Hz: 	return 8000;
       
    33 		case ESoundRate8820Hz: 	return 8820;
       
    34 		case ESoundRate9600Hz: 	return 9600;
       
    35 		case ESoundRate11025Hz: return 11025;
       
    36 		case ESoundRate12000Hz: return 12000;
       
    37 		case ESoundRate14700Hz:	return 14700;
       
    38 		case ESoundRate16000Hz: return 16000;
       
    39 		case ESoundRate22050Hz: return 22050;
       
    40 		case ESoundRate24000Hz: return 24000;
       
    41 		case ESoundRate29400Hz: return 29400;
       
    42 		case ESoundRate32000Hz: return 32000;
       
    43 		case ESoundRate44100Hz: return 44100;
       
    44 		case ESoundRate48000Hz: return 48000;
       
    45 		}
       
    46 	return KErrNotFound;
       
    47 	}
       
    48 
       
    49 static TInt GetSoundEncoding( TSoundEncoding aV )
       
    50 	{
       
    51 	switch (aV)
       
    52 		{
       
    53 		case ESoundEncoding8BitPCM: return Audio::EFormatS8;
       
    54 		case ESoundEncoding16BitPCM: return Audio::EFormatS16;
       
    55 		case ESoundEncoding24BitPCM: break; // not supported
       
    56 		}
       
    57 	return -KErrNotFound;
       
    58 	}
       
    59 static TInt GetChannels( TInt aV )
       
    60 	{
       
    61 	switch (aV)
       
    62 		{
       
    63 		case KSoundMonoChannel: return 1;
       
    64 		case KSoundStereoChannel: return 2;
       
    65 		}
       
    66 	return KErrNotFound;
       
    67 	}
       
    68 
       
    69 DDriverSyborgSoundScPdd::DDriverSyborgSoundScPdd(DDriverSyborgSoundScPddFactory* aPhysicalDevice, 
       
    70 	TInt aUnitType, VirtIo::DIoHandler* aIoHandler, TUint aDataQueueId )
       
    71 	: iPhysicalDevice(aPhysicalDevice),  iUnitType(aUnitType), iIoHandler( aIoHandler ), iDataQueueId( aDataQueueId )
       
    72 	{
       
    73 	}
       
    74 
       
    75 DDriverSyborgSoundScPdd::~DDriverSyborgSoundScPdd()
       
    76 	{
       
    77 	SYBORG_SOUND_DEBUG("~DDriverSyborgSoundScPdd()");
       
    78 	iIoHandler->UnregisterClient( this );
       
    79 	delete iAudioControl;
       
    80 	SYBORG_SOUND_DEBUG("~DDriverSyborgSoundScPdd() - done");
       
    81 	}
       
    82 
       
    83 TInt DDriverSyborgSoundScPdd::DoCreate()
       
    84 	{
       
    85 	SetCaps();
       
    86 	
       
    87 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::DoCreate TxPdd");
       
    88 
       
    89 	SYBORG_SOUND_DEBUG("Registering with IOHandler %x", iIoHandler );
       
    90 	iIoHandler->RegisterClient( this );
       
    91 	SYBORG_SOUND_DEBUG("Registered with IoHandler... Done %x", iIoHandler);
       
    92 	
       
    93 	iAudioControl = new Audio::DControl( *iIoHandler, iDataQueueId );
       
    94 	iAudioControl->Construct();
    24 		
    95 		
    25 	soundscpdd->Callback(soundscpdd->iTransferArray[0].iTransferID, KErrNone, soundscpdd->iTransferArray[0].iNumBytes);
       
    26 	
       
    27 	}
       
    28 
       
    29 
       
    30 DDriverSyborgSoundScPdd::DDriverSyborgSoundScPdd() : iTimer(TimerCallback,this)
       
    31 	{
       
    32 
       
    33 	}
       
    34 
       
    35 DDriverSyborgSoundScPdd::~DDriverSyborgSoundScPdd()
       
    36 	{
       
    37 	iTimer.Cancel();
       
    38 	}
       
    39 
       
    40 
       
    41 TInt DDriverSyborgSoundScPdd::DoCreate()
       
    42 	{
       
    43 
       
    44 	SetCaps();
       
    45 
       
    46 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::DoCreate TxPdd");
       
    47 	
       
    48 	return KErrNone;
    96 	return KErrNone;
    49 	}
    97 	}
    50 
    98 
    51 void DDriverSyborgSoundScPdd::GetChunkCreateInfo(TChunkCreateInfo& aChunkCreateInfo)
    99 void DDriverSyborgSoundScPdd::GetChunkCreateInfo(TChunkCreateInfo& aChunkCreateInfo)
    52 	{
   100 	{
    58 	aChunkCreateInfo.iDestroyedDfc = NULL; 				// No chunk destroy DFC
   106 	aChunkCreateInfo.iDestroyedDfc = NULL; 				// No chunk destroy DFC
    59 	}
   107 	}
    60 
   108 
    61 void DDriverSyborgSoundScPdd::Caps(TDes8& aCapsBuf) const
   109 void DDriverSyborgSoundScPdd::Caps(TDes8& aCapsBuf) const
    62 	{
   110 	{
    63 
       
    64 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Caps TxPdd");
   111 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Caps TxPdd");
    65 	
   112 	
    66 	// Fill the structure with zeros in case it is a newer version than we know about
   113 	// Fill the structure with zeros in case it is a newer version than we know about
    67 	aCapsBuf.FillZ(aCapsBuf.MaxLength());
   114 	aCapsBuf.FillZ(aCapsBuf.MaxLength());
    68 
   115 
    71 	aCapsBuf = ptr.Left(Min(ptr.Length(), aCapsBuf.MaxLength()));
   118 	aCapsBuf = ptr.Left(Min(ptr.Length(), aCapsBuf.MaxLength()));
    72 	}
   119 	}
    73 
   120 
    74 TInt DDriverSyborgSoundScPdd::SetConfig(const TDesC8& aConfigBuf)
   121 TInt DDriverSyborgSoundScPdd::SetConfig(const TDesC8& aConfigBuf)
    75 	{
   122 	{
    76 
       
    77 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::SetConfig TxPdd");
   123 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::SetConfig TxPdd");
    78 	
   124 	
    79 	// Read the new configuration from the LDD
   125 	// Read the new configuration from the LDD
    80 	TCurrentSoundFormatV02 config;
   126 	TCurrentSoundFormatV02 config;
    81 	TPtr8 ptr((TUint8*) &config, sizeof(config));
   127 	TPtr8 ptr((TUint8*) &config, sizeof(config));
    82 	Kern::InfoCopy(ptr, aConfigBuf);
   128 	Kern::InfoCopy(ptr, aConfigBuf);
    83 
   129 	
       
   130 	TInt channels = GetChannels(config.iChannels);
       
   131 	Audio::FormatId encoding = static_cast<Audio::FormatId>( GetSoundEncoding(config.iEncoding) );
       
   132 	TInt freq = GetSampleRate(config.iRate);
       
   133 	Audio::StreamDirection direction = static_cast<Audio::StreamDirection>(
       
   134 		(iUnitType == KSoundScRxUnit0)?Audio::EDirectionRecord
       
   135 		:(iUnitType == KSoundScTxUnit0)?Audio::EDirectionPlayback:-1 );
       
   136 
       
   137 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::SetConfig c %x, e %x, f %x, d %x",
       
   138 		channels, encoding, freq, direction );
       
   139 	
       
   140 	if ( (channels < 0 )
       
   141 		|| ( encoding < 0 )
       
   142 		|| ( freq < 0 ) 
       
   143 		|| ( direction < 0 )
       
   144 		)
       
   145 		{
       
   146 		SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::SetConfig failed");		
       
   147 		return KErrArgument;
       
   148 		}
       
   149 	
       
   150 	TInt st = iAudioControl->Setup( direction, channels, encoding, freq );
       
   151 	if (st !=KErrNone)
       
   152 		{
       
   153 		SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::SetConfig failed %d", st);				
       
   154 		return st;
       
   155 		}
       
   156 	
    84 	iConfig = config;
   157 	iConfig = config;
    85 	
   158 	
    86 	return KErrNone;
   159 	return KErrNone;
    87 	}
   160 	}
    88 
   161 
    89 
   162 
    90 TInt DDriverSyborgSoundScPdd::SetVolume(TInt aVolume)
   163 TInt DDriverSyborgSoundScPdd::SetVolume(TInt aVolume)
    91 	{
   164 	{
    92 	
       
    93 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Setvolume TxPdd");
   165 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Setvolume TxPdd");
    94 	
   166 	
    95 	return KErrNone;
   167 	return KErrNone;
    96 	}
   168 	}
    97 
   169 
    98 
   170 
    99 TInt DDriverSyborgSoundScPdd::StartTransfer()
   171 TInt DDriverSyborgSoundScPdd::StartTransfer()
   100 	{
   172 	{
   101 	
   173 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::starttransfer TxPdd S");
   102 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::starttransfer TxPdd");
   174 	iAudioControl->SendCommand( Audio::DControl::ERun );
   103 	
   175 	return KErrNone;
   104 	//Prepare for transfer
   176 	}
   105 	return KErrNone;
   177 	
   106 	
   178 	
   107 	}
       
   108 
       
   109 TInt DDriverSyborgSoundScPdd::CalculateBufferTime(TInt aNumBytes)
   179 TInt DDriverSyborgSoundScPdd::CalculateBufferTime(TInt aNumBytes)
   110 	{
   180 	{
   111 	
   181 	TUint samplerate=GetSampleRate( iConfig.iRate );
   112 	TUint samplerate=0;
       
   113 
       
   114 	// Let the compiler perform an integer division of rates
       
   115 	switch(iConfig.iRate)
       
   116 		{
       
   117 		case ESoundRate7350Hz: 	samplerate = 7350; break;
       
   118 		case ESoundRate8000Hz: 	samplerate = 8000; break;
       
   119 		case ESoundRate8820Hz: 	samplerate = 8820; break;
       
   120 		case ESoundRate9600Hz: 	samplerate = 9600; break;
       
   121 		case ESoundRate11025Hz: samplerate = 11025; break;
       
   122 		case ESoundRate12000Hz: samplerate = 12000; break;
       
   123 		case ESoundRate14700Hz:	samplerate = 14700; break;
       
   124 		case ESoundRate16000Hz: samplerate = 16000; break;
       
   125 		case ESoundRate22050Hz: samplerate = 22050; break;
       
   126 		case ESoundRate24000Hz: samplerate = 24000; break;
       
   127 		case ESoundRate29400Hz: samplerate = 29400; break;
       
   128 		case ESoundRate32000Hz: samplerate = 32000; break;
       
   129 		case ESoundRate44100Hz: samplerate = 44100; break;
       
   130 		case ESoundRate48000Hz: samplerate = 48000; break;
       
   131 		}
       
   132 
       
   133 
   182 
   134 	// integer division by number of channels
   183 	// integer division by number of channels
   135 	aNumBytes /= iConfig.iChannels;
   184 	aNumBytes /= iConfig.iChannels;
   136 
   185 
   137 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::iChannels =%d", iConfig.iChannels);
       
   138 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::iEncoding =%d", iConfig.iEncoding);
       
   139 	
       
   140 	// integer division by bytes per sample
   186 	// integer division by bytes per sample
   141 	switch(iConfig.iEncoding)
   187 	switch(iConfig.iEncoding)
   142 		{
   188 		{
   143 		case ESoundEncoding8BitPCM: break;
   189 		case ESoundEncoding8BitPCM: break;
   144 		case ESoundEncoding16BitPCM: aNumBytes /= 2; break;
   190 		case ESoundEncoding16BitPCM: aNumBytes /= 2; break;
   145 		case ESoundEncoding24BitPCM: aNumBytes /= 3; break;
   191 		case ESoundEncoding24BitPCM: aNumBytes /= 3; break;
   146 		}
   192 		}
   147 
   193 
   148 	return (aNumBytes * 1000) / samplerate; //return time in milliseconds
   194 	return (aNumBytes * 1000) / samplerate; //return time in milliseconds
   149 	
   195 	}
   150 
   196 
   151 	}
   197 TInt DDriverSyborgSoundScPdd::TransferData(TUint aTransferID, TLinAddr aLinAddr, TPhysAddr aPhysAddr, TInt aNumBytes)
   152 
   198 	{
   153 TInt DDriverSyborgSoundScPdd::TransferData(TUint aTransferID, TLinAddr aLinAddr, TPhysAddr /*aPhysAddr*/, TInt aNumBytes)
   199 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::TransferData unit %x aTId=%x, linAddr=%x,phAddr=%x,len=%x", 
   154 	{
   200 		iUnitType, aTransferID, aLinAddr, aPhysAddr, aNumBytes);
   155 
   201 	
   156 	//function wil get called multiple times while transfer is in progress therefore keep fifo queue of requests
   202 	iAudioControl->SendDataBuffer( 
   157 	TTransferArrayInfo transfer;	
   203 		reinterpret_cast<TAny*>( aLinAddr ), aNumBytes, reinterpret_cast<Token>( aTransferID ) );
       
   204 
       
   205 	return KErrNone;
       
   206 	}
       
   207 
       
   208 void DDriverSyborgSoundScPdd::StopTransfer()
       
   209 	{
       
   210 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::stoptransfer TxPdd");
       
   211 	
       
   212 	iAudioControl->SendCommand( Audio::DControl::EStop );
       
   213 	}
       
   214 
       
   215 
       
   216 TInt DDriverSyborgSoundScPdd::PauseTransfer()
       
   217 	{
       
   218 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::pausetransfer TxPdd");
       
   219 	iAudioControl->SendCommand( Audio::DControl::EPause );
       
   220 	return KErrNone;
       
   221 	}
       
   222 
       
   223 
       
   224 TInt DDriverSyborgSoundScPdd::ResumeTransfer()
       
   225 	{
       
   226 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::resumetransfer TxPdd");
       
   227 	iAudioControl->SendCommand( Audio::DControl::EResume );
       
   228 	return KErrNone;
       
   229 	}
       
   230 
       
   231 TInt DDriverSyborgSoundScPdd::PowerUp()
       
   232 	{
       
   233 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::PowerUp TxPdd");
       
   234 	return KErrNone;
       
   235 	}
       
   236 
       
   237 void DDriverSyborgSoundScPdd::PowerDown()
       
   238 	{
       
   239 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Powerdown TxPdd");
       
   240 	}
       
   241 
       
   242 TInt DDriverSyborgSoundScPdd::CustomConfig(TInt /*aFunction*/,TAny* /*aParam*/)
       
   243 	{
       
   244 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::CustomConfig TxPdd");
       
   245 	return KErrNotSupported;
       
   246 	}
       
   247 
       
   248 TBool DDriverSyborgSoundScPdd::VirtIoCallback( MIoHandler& aVirtIoHandler, MQueue& aQueue, 
       
   249 	Token aToken, TUint aBytesTransferred )
       
   250 	{
       
   251 	if ( &aQueue != &iAudioControl->DataQueue() )
       
   252 		{ return ETrue; }
       
   253 			
       
   254 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::VirtIoCallback t%x, s%x", aToken, aBytesTransferred);
       
   255 	
       
   256 	if ( iCaps.iDirection == ESoundDirPlayback )
       
   257 		{
       
   258 		Ldd()->PlayCallback( (TUint) aToken, KErrNone, aBytesTransferred );
       
   259 		}
       
   260 	else
       
   261 		{
       
   262 		Ldd()->RecordCallback( (TUint) aToken, KErrNone, aBytesTransferred );
       
   263 		}
   158 		
   264 		
   159 	transfer.iTransferID = aTransferID;
   265 	return EFalse; // cannot process any more buffers in this go due to a bug in LDD?
   160 	transfer.iLinAddr = aLinAddr;
   266 	}
   161 	transfer.iNumBytes = aNumBytes;
       
   162 	
       
   163 	//calculate the amount of time required to play/record buffer
       
   164 	TInt buffer_play_time = CalculateBufferTime(aNumBytes);
       
   165 	TInt timerticks = NKern::TimerTicks(buffer_play_time);
       
   166 	transfer.iPlayTime = timerticks;
       
   167 	
       
   168 	iTransferArray.Append(transfer);
       
   169 	
       
   170 	//Timer will callback when correct time has elapsed, will return KErrInUse if transfer
       
   171 	//already active, this is ok becuase will be started again in callback
       
   172 	TInt err = iTimer.OneShot(timerticks, ETrue);
       
   173 	
       
   174 	
       
   175 	return KErrNone;
       
   176 	}
       
   177 
       
   178 void DDriverSyborgSoundScPdd::StopTransfer()
       
   179 	{
       
   180 	// Stop transfer
       
   181 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::stoptransfer TxPdd");
       
   182 	
       
   183 	//If timer is currently active then cancel it and call back buffer
       
   184 	if(iTimer.Cancel())
       
   185 		{
       
   186 		Callback(iTransferArray[0].iTransferID, KErrNone, iTransferArray[0].iNumBytes);
       
   187 		}
       
   188 		
       
   189 
       
   190 	}
       
   191 
       
   192 
       
   193 TInt DDriverSyborgSoundScPdd::PauseTransfer()
       
   194 	{
       
   195 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::pausetransfer TxPdd");
       
   196 	//Pause Transfer
       
   197 	
       
   198 	return KErrNone;
       
   199 	}
       
   200 
       
   201 
       
   202 TInt DDriverSyborgSoundScPdd::ResumeTransfer()
       
   203 	{
       
   204 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::resumetransfer TxPdd");
       
   205 	//Resume Transfer
       
   206 	
       
   207 	return KErrNone;
       
   208 	}
       
   209 
       
   210 TInt DDriverSyborgSoundScPdd::PowerUp()
       
   211 	{
       
   212 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::PowerUp TxPdd");
       
   213 	return KErrNone;
       
   214 	}
       
   215 
       
   216 void DDriverSyborgSoundScPdd::PowerDown()
       
   217 	{
       
   218 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::Powerdown TxPdd");
       
   219 	}
       
   220 
       
   221 TInt DDriverSyborgSoundScPdd::CustomConfig(TInt /*aFunction*/,TAny* /*aParam*/)
       
   222 	{
       
   223 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::customconfig TxPdd");
       
   224 	return KErrNotSupported;
       
   225 	}
       
   226 
       
   227 
       
   228 void DDriverSyborgSoundScPdd::Callback(TUint aTransferID, TInt aTransferResult, TInt aBytesTransferred)
       
   229 	{
       
   230 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::playcallback TxPdd");
       
   231 	//Callback when Transfer completes or is stopped
       
   232 	
       
   233 	iTransferArray.Remove(0);
       
   234 	
       
   235 	if(iUnitType == KSoundScTxUnit0)
       
   236 		{
       
   237 		Ldd()->PlayCallback(aTransferID, aTransferResult, aBytesTransferred);
       
   238 		}
       
   239 	else if(iUnitType == KSoundScRxUnit0)
       
   240 		{
       
   241 		Ldd()->RecordCallback(aTransferID, aTransferResult, aBytesTransferred);
       
   242 		}
       
   243 	
       
   244 	if(	iTransferArray.Count()>0)
       
   245 		{
       
   246 		iTimer.OneShot(iTransferArray[0].iPlayTime, ETrue);
       
   247 		}
       
   248 	
       
   249 	}
       
   250 
       
   251 TDfcQue*DDriverSyborgSoundScPdd::DfcQ(TInt /* aUnit*/ )
       
   252         {
       
   253         return this->DfcQ();
       
   254         }
       
   255 
   267 
   256 TDfcQue*DDriverSyborgSoundScPdd::DfcQ()
   268 TDfcQue*DDriverSyborgSoundScPdd::DfcQ()
   257         {
   269 	{
   258         return iPhysicalDevice->iDfcQ;
   270 	return iPhysicalDevice->iDfcQ;
   259         }
   271 	}
       
   272 	
       
   273 TDfcQue*DDriverSyborgSoundScPdd::DfcQ( TInt /* aUinit */ )
       
   274 	{
       
   275 	return iPhysicalDevice->iDfcQ;
       
   276 	}
       
   277 
   260 
   278 
   261 TInt DDriverSyborgSoundScPdd::MaxTransferLen() const
   279 TInt DDriverSyborgSoundScPdd::MaxTransferLen() const
   262 	{
   280 	{
   263 	
   281 	return KMaxTransferLength; 
   264 	SYBORG_SOUND_DEBUG("DDriverSyborgSoundScPdd::MaxTransferLen TxPdd");
       
   265 	
       
   266 	TInt maxlength = 200*1024;
       
   267 	return maxlength;
       
   268 	}
   282 	}
   269 
   283 
   270 
   284 
   271 void DDriverSyborgSoundScPdd::SetCaps()
   285 void DDriverSyborgSoundScPdd::SetCaps()
   272 	{
   286 	{
   277 		// The data transfer direction for this unit is play
   291 		// The data transfer direction for this unit is play
   278 		iCaps.iDirection = ESoundDirPlayback;
   292 		iCaps.iDirection = ESoundDirPlayback;
   279 		}
   293 		}
   280 	else if(iUnitType == KSoundScRxUnit0)
   294 	else if(iUnitType == KSoundScRxUnit0)
   281 		{
   295 		{
   282 		// The data transfer direction for this unit is record 
   296 		// The data transfer direction for this unit is play
   283 		iCaps.iDirection = ESoundDirRecord;
   297 		iCaps.iDirection = ESoundDirRecord;
   284 		}
   298 		}
   285 	
   299 	
   286 	// This unit supports both mono and stereo
   300 	// This unit supports both mono and stereo
   287 	iCaps.iChannels = (KSoundMonoChannel | KSoundStereoChannel);
   301 	iCaps.iChannels = (KSoundMonoChannel | KSoundStereoChannel);