1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "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 * Ixonos Plc

    14 *

    15 * Description:

    16 *

    17 */

    18 

    19 

    20 #ifndef __CPROCMP3INFILEHANDLER_H__

    21 #define __CPROCMP3INFILEHANDLER_H__

    22 

    23 /*-- System Headers. --*/

    24 #include <e32base.h>

    25 #include <f32file.h>

    26 

    27 /*-- Project Headers. --*/

    28 #include "AudCommon.h"

    29 #include "ProcFrameHandler.h"

    30 #include "ProcInFileHandler.h"

    31 #include "Logfile.h"

    32 

    33 #include "defines.h"

    34 

    35 #include "Mp3API.h"

    36 

    37 #include "ProcDecoder.h"

    38 //#include "mpif.h"

    39 

    40 

    41 

    42 /**

    43  * File handler class for accessing MP3 content.

    44  *

    45  * @author  Juha Ojanperä

    46  */

    47 class CProcMP3InFileHandler: public CProcInFileHandler 

    48     {

    49 public:

    50 

    51     /*

    52     * Constructors & destructor

    53     */

    54 

    55     static CProcMP3InFileHandler* NewL(const TDesC& aFileName, RFile* aFileHandle,

    56                                        CAudClip* aClip, TInt aReadBufferSize,

    57                                            TInt aTargetSampleRate = 0, 

    58                                            TChannelMode aChannelMode = EAudSingleChannel);

    59 

    60     static CProcMP3InFileHandler* NewLC(const TDesC& aFileName, RFile* aFileHandle,

    61                                         CAudClip* aClip, TInt aReadBufferSize,

    62                                             TInt aTargetSampleRate = 0, 

    63                                             TChannelMode aChannelMode = EAudSingleChannel);

    64                                         

    65     virtual ~CProcMP3InFileHandler();

    66 

    67 

    68     // From CProcInFileHandler ----------------->

    69     void GetPropertiesL(TAudFileProperties* aProperties);

    70     

    71     TBool SeekAudioFrame(TInt32 aTime);

    72 

    73     TBool SeekCutInFrame();

    74     

    75     virtual TBool GetDurationL(TInt32& aTime, TInt& aFrameAmount);

    76 

    77     virtual TBool SetNormalizingGainL(const CProcFrameHandler* aFrameHandler);

    78 

    79     //<-----------------------------------------

    80 

    81 

    82 private:

    83     

    84     // constructL

    85     void ConstructL(const TDesC& aFileName, RFile* aFileHandle, CAudClip* aClip, 

    86                     TInt aReadBufferSize, TInt aTargetSampleRate = 0, 

    87                     TChannelMode aChannelMode = EAudSingleChannel);

    88     

    89     // C++ constructor

    90     CProcMP3InFileHandler();

    91     

    92     TBool GetEncAudioFrameL(HBufC8*& aFrame, TInt& aSize, TInt32& aTime);

    93 

    94     // gets one Mp3 frame

    95     int16 GetMP3Frame(uint8 *dataBytes, int16 bufSize, TMpFrameState *frState, uint8 syncStatus);

    96 

    97     // gets bitrate

    98     int16 GetMP3Bitrate(void);

    99     

   100     // check that file is valid mp3

   101     TBool Validate(TDes8& aDes);

   102     

   103     // seek for frame sync codes

   104     TInt SeekSync(TDes8& aDes, TInt aBufPos);

   105     

   106     // get info for a single frame

   107     TInt FrameInfo(const TUint8* aBuf,TInt aBufLen,TInt& aBitRate);

   108     

   109     // get ID3 header length

   110     TInt ID3HeaderLength(TDes8& aDes, TInt aPosition);

   111 

   112 private:

   113 

   114     /*-- MP3 file format handle. --*/

   115     TMpTransportHandle *mp3FileFormat;

   116 

   117     /*-- Legal MP3 file? --*/

   118     uint8 isValidMP3;

   119 

   120     /*-- Input buffer; start of frame is seached from here. --*/

   121     uint8 *mp3HeaderBytes;

   122     

   123     CLogFile *mp3Log;

   124     

   125     /*-- Free format flag. --*/

   126     uint8 isFreeFormatMP3;

   127     

   128     

   129     // a handle to mp3 editing class in MP3AACManipLib    

   130     CMp3Edit* iMp3Edit;

   131 

   132     /*-- VBR bitrate flag; ETrue indicates VBR file, EFalse constant. --*/

   133     uint8 isVbrMP3;

   134     

   135     };

   136 

   137 #endif /*-- __CPROCMP3INFILEHANDLER_H__ --*/