1 /*

     2 * Copyright (c) 2002-2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  This class implements RateControl for HTTP stream audio player.

    15 *

    16 */

    17 

    18 

    19 //  INCLUDE FILES

    20 #include <jdebug.h>

    21 #include <e32base.h>

    22 

    23 #include "cmmaaudiostreamratecontrol.h"

    24 

    25 namespace

    26 {

    27 const TInt KErrorMessageSize = 32;

    28 _LIT(KErrDefaultError, "Symbian OS Error: %d");

    29 }

    30 

    31 CMMAAudioStreamRateControl* CMMAAudioStreamRateControl::NewL(CMMAAudioStreamPlayer* aPlayer)

    32 {

    33     CMMAAudioStreamRateControl* self = new(ELeave) CMMAAudioStreamRateControl(aPlayer);

    34     CleanupStack::PushL(self);

    35     self->ConstructL();

    36     CleanupStack::Pop(self);

    37     return self;

    38 }

    39 

    40 CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl()

    41 {

    42     DEBUG("MMA:CMMAAudioStreamRateControl::~CMMAAudioStreamRateControl");

    43     if (iPlayer)

    44     {

    45         iPlayer->RemoveStateListener(this);

    46     }

    47 }

    48 

    49 CMMAAudioStreamRateControl::CMMAAudioStreamRateControl(CMMAAudioStreamPlayer* aPlayer) :

    50         iPlayer(aPlayer), iCurrentRate(KMMADefaultRate)

    51 {

    52     DEBUG("MMA:CMMAAudioStreamRateControl::CMMAAudioStreamRateControl");

    53 }

    54 

    55 void CMMAAudioStreamRateControl::ConstructL()

    56 {

    57     iPlayer->AddStateListenerL(this);

    58 }

    59 

    60 void CMMAAudioStreamRateControl::StateChanged(TInt aState)

    61 {

    62     DEBUG("MMA:CMMAAudioStreamRateControl::StateChanged");

    63     if (aState == CMMAPlayer::EStarted && iCurrentRate == KMMAMinRate)

    64     {

    65         // do not post event to Java or change player state

    66         TInt err = iPlayer->Pause();

    67         if (err != KErrNone)

    68         {

    69             DEBUG_INT("CMMAAudioStreamRateControl::StateChanged: Pause error %d", err);

    70             TBuf<KErrorMessageSize> errorMessage;

    71             errorMessage.Format(KErrDefaultError, err);

    72             iPlayer->PostStringEvent(CMMAPlayerEvent::EError, errorMessage);

    73         }

    74     }

    75 }

    76 

    77 TInt CMMAAudioStreamRateControl::SetRateL(TInt aRate)

    78 {

    79     DEBUG("MMA:CMMAAudioStreamRateControl::SetRateL");

    80     TInt newRate;

    81     if (aRate <= KMMAMinRate)

    82     {

    83         newRate = KMMAMinRate;

    84     }

    85     else

    86     {

    87         newRate = KMMADefaultRate;

    88     }

    89 

    90     if ((iPlayer->State() == CMMAPlayer::EStarted) &&

    91             (newRate != iCurrentRate))

    92     {

    93         if (newRate == KMMAMinRate)

    94         {

    95             // do not post event to Java or change player state

    96             User::LeaveIfError(iPlayer->Pause());

    97         }

    98         else

    99         {

   100             // do not post event to Java or change player state

   101             iPlayer->StartL();

   102         }

   103     }

   104     iCurrentRate = newRate;

   105     return iCurrentRate;

   106 }

   107 

   108 TInt CMMAAudioStreamRateControl::RateL()

   109 {

   110     return iCurrentRate;

   111 }

   112 

   113 

   114 //  END OF FILE