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 

    21 #ifndef __CPROCProcDecoder_H__

    22 #define __CPROCProcDecoder_H__

    23 

    24 #include <e32base.h>

    25 #include <f32file.h>

    26 #include <MMFCodec.h>

    27 

    28 #include "AudCommon.h"

    29 #include "ProcConstants.h"

    30 #include "RateConverter.h"

    31 

    32 class CProcDecoder : public CBase

    33     {

    34 

    35 public:

    36     

    37     /*

    38     * Symbian constructors

    39     *

    40     */

    41     

    42     static CProcDecoder* NewL();

    43                                         

    44     static CProcDecoder* NewLC();

    45 

    46     /*

    47     * Destructor

    48     */

    49     ~CProcDecoder();

    50     

    51     /*

    52     * Initialize the decoder

    53     *

    54     * @param aProperties            properties of the input clip (in compressed domain)

    55     * @param aTargetSamplingRate    sampling rate to decode to

    56     * @param aChannelMode           channel mode to decode to

    57     *

    58     * @return ETrue if successful

    59     *

    60     */

    61 

    62     TBool InitL(TAudFileProperties aProperties, TInt aTargetSamplingRate, TChannelMode aChannelMode);

    63 

    64     /*

    65     * Feed the encoder

    66     *

    67     * @param    aEncFrame   encoded input frame

    68     * @param    aDecbuffer  buffer for decoded output data

    69     *

    70     * @return   ETrue if output was generated, EFalse if more data is needed

    71     */

    72         

    73     TBool FillDecBufferL(const HBufC8* aEncFrame, HBufC8*& aDecBuffer);

    74     

    75     

    76 

    77 protected:

    78     

    79     // constructL    

    80     void ConstructL();

    81     

    82     // C++ constructor

    83     CProcDecoder();

    84     

    85     // configure AAC decoder

    86     // configure AAC Plus decoder

    87     void ConfigureAACPlusDecoderL();

    88     

    89     // configure MP3 decoder

    90     void ConfigureMP3DecoderL();

    91     

    92     // if input buffer is too small

    93     void ReAllocBufferL( CMMFDataBuffer* aBuffer, TInt aNewMaxSize );

    94     

    95     // feed the codec

    96     void FeedCodecL( CMMFCodec* aCodec, CMMFDataBuffer* aSourceBuffer, CMMFDataBuffer* aDestBuffer );

    97     

    98     // decode

    99     TCodecProcessResult DecodeL( CMMFCodec* aCodec, CMMFDataBuffer* aInBuffer, CMMFDataBuffer* aOutBuffer);

   100  

   101     // is supported dest codec?

   102     TBool GetIsSupportedSourceCodec();

   103      

   104     // set source codec

   105     void SetSourceCodecL();

   106      

   107     // is codec available?

   108     TBool CheckIfCodecAvailableL(const TDesC8& aCodecFourCCString, const TUid& aCodecUId );

   109  

   110     // update output buffer

   111     TBool UpdateOutputBufferL(CMMFDataBuffer* aInBuffer);

   112      

   113  protected:

   114      

   115     // properties of the input data

   116     TAudFileProperties iProperties;

   117     

   118     // a flag to indicate if decoding can take place

   119     TBool iReady;

   120     

   121     // Input buffer for decoder.

   122     CMMFDataBuffer* iSourceInputBuffer;

   123     

   124     // Input buffer for encoder (alternative output buffer for decoder).

   125     CMMFDataBuffer* iDestInputBuffer;

   126     

   127     CMMFDataBuffer* iSampleRateChannelBuffer;

   128         

   129     // Codec used in decoding input audio to PCM16

   130     CMMFCodec* iSourceCodec;

   131     

   132     // Channel and sample rate converter

   133     CRateConverter* iRateConverter;    

   134     

   135     // Whether audio converter needs to do channel and/or samplerate conversion.

   136     TBool iDoSampleRateChannelConversion;

   137     

   138     // Whether decoding is required (not required if input is WAV)

   139     TBool iDoDecoding;

   140 

   141     // Samplerate to convert from.

   142     TInt iFromSampleRate;

   143     // Samplerate to convert to.

   144     TInt iToSampleRate;

   145     // Number of channels in input.

   146     TInt iFromChannels;

   147     // Number of channels in output.

   148     TInt iToChannels;

   149     

   150     // a pointer to store output buffer

   151     HBufC8* iDecBuffer;

   152    

   153     // decimation factor for decoder

   154     TInt iDecimFactor;

   155 

   156     

   157     };

   158 

   159 #endif