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11 <h1>examples/Multimedia/MmfExFormatPlugin/mmfrawformat.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).</span> |
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12 <a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span> |
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13 <a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span> |
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14 <a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span> |
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15 <a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span> |
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16 <a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span> |
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17 <a name="l00007"></a>00007 <span class="comment">//</span> |
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18 <a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span> |
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19 <a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span> |
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20 <a name="l00010"></a>00010 <span class="comment">//</span> |
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21 <a name="l00011"></a>00011 <span class="comment">// Contributors:</span> |
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22 <a name="l00012"></a>00012 <span class="comment">//</span> |
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23 <a name="l00013"></a>00013 <span class="comment">// Description:</span> |
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24 <a name="l00014"></a>00014 <span class="comment">//</span> |
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25 <a name="l00015"></a>00015 |
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26 <a name="l00016"></a>00016 <span class="comment">// MMF framework headers</span> |
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27 <a name="l00017"></a>00017 <span class="preprocessor">#include <mmffile.h></span> |
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28 <a name="l00018"></a>00018 <span class="preprocessor">#include <ecom.h></span> |
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29 <a name="l00019"></a>00019 <span class="preprocessor">#include <mmfformatimplementationuids.hrh></span> |
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30 <a name="l00020"></a>00020 <span class="preprocessor">#include <mmffourcc.h></span> |
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31 <a name="l00021"></a>00021 |
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32 <a name="l00022"></a>00022 <span class="preprocessor">#include "mmfrawformat.h"</span> |
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33 <a name="l00023"></a>00023 <span class="preprocessor">#include "UIDs.hrh"</span> |
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34 <a name="l00024"></a>00024 |
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35 <a name="l00025"></a>00025 <span class="keyword">const</span> TUint KFormatDefaultFrameSize(0x1000); <span class="comment">//Set default frame size to 4 K</span> |
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36 <a name="l00026"></a>00026 <span class="keyword">const</span> TUint KDefineIOBufferSize(0x0200); <span class="comment">//easy to read clip buffer size</span> |
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37 <a name="l00027"></a>00027 <span class="keyword">const</span> TUint KOneSecondInMicroSeconds(1000000); <span class="comment">//1 Second</span> |
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38 <a name="l00028"></a>00028 <span class="keyword">const</span> TUint KMono(1); |
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39 <a name="l00029"></a>00029 <span class="keyword">const</span> TUint KStereo(2); |
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40 <a name="l00030"></a>00030 <span class="comment">//this defines the valid sample rates for RAW</span> |
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41 <a name="l00031"></a>00031 <span class="keyword">const</span> TUint KRawSampleRates[] = { 8000, 11025, 22050, 44100 }; |
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42 <a name="l00032"></a>00032 |
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43 <a name="l00033"></a>00033 |
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44 <a name="l00034"></a>00034 <span class="comment">//</span> |
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45 <a name="l00035"></a>00035 <span class="comment">// CMMFRawFormatRead</span> |
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46 <a name="l00036"></a>00036 <span class="comment">//</span> |
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47 <a name="l00037"></a>00037 |
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48 <a name="l00038"></a>00038 <span class="comment">// Factory function</span> |
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49 <a name="l00039"></a>00039 CMMFFormatDecode* CMMFRawFormatRead::NewL(MDataSource* aSource) |
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50 <a name="l00040"></a>00040 { |
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51 <a name="l00041"></a>00041 <span class="keywordflow">if</span> ((aSource->DataSourceType()==KUidMmfDescriptorSource)|| |
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52 <a name="l00042"></a>00042 (aSource->DataSourceType()==KUidMmfFileSource)) |
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53 <a name="l00043"></a>00043 {<span class="comment">//currently only files and descriptor MDataSources are supported</span> |
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54 <a name="l00044"></a>00044 <a class="code" href="class_c_m_m_f_raw_format_read.html">CMMFRawFormatRead</a>* <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave)<a class="code" href="class_c_m_m_f_raw_format_read.html">CMMFRawFormatRead</a>; |
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55 <a name="l00045"></a>00045 CleanupStack::PushL(<span class="keyword">self</span>); |
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56 <a name="l00046"></a>00046 <span class="keyword">self</span>->ConstructL(aSource); |
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57 <a name="l00047"></a>00047 CleanupStack::Pop(); |
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58 <a name="l00048"></a>00048 <span class="keywordflow">return</span> <span class="keyword">self</span>; |
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59 <a name="l00049"></a>00049 } |
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60 <a name="l00050"></a>00050 <span class="keywordflow">else</span> <span class="keywordflow">return</span> NULL; |
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61 <a name="l00051"></a>00051 } |
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62 <a name="l00052"></a>00052 |
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63 <a name="l00053"></a>00053 <span class="comment">// Destructor</span> |
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64 <a name="l00054"></a>00054 CMMFRawFormatRead::~CMMFRawFormatRead() |
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65 <a name="l00055"></a>00055 { |
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66 <a name="l00056"></a>00056 <span class="keyword">delete</span> iBuffer; |
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67 <a name="l00057"></a>00057 } |
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68 <a name="l00058"></a>00058 |
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69 <a name="l00059"></a>00059 <span class="comment">// Second-phase constructor</span> |
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70 <a name="l00060"></a>00060 <span class="keywordtype">void</span> CMMFRawFormatRead::ConstructL(MDataSource* aSource) |
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71 <a name="l00061"></a>00061 { |
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72 <a name="l00062"></a>00062 <span class="comment">// tell clip we're using it</span> |
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73 <a name="l00063"></a>00063 iClip = aSource; |
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74 <a name="l00064"></a>00064 User::LeaveIfError(iClip->SourceThreadLogon(*<span class="keyword">this</span>)); |
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75 <a name="l00065"></a>00065 iClip->SourcePrimeL(); |
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76 <a name="l00066"></a>00066 iFrameSize = KFormatDefaultFrameSize; |
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77 <a name="l00067"></a>00067 iClipLength = (<span class="keyword">static_cast<</span>CMMFClip*<span class="keyword">></span>(iClip))->Size(); |
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78 <a name="l00068"></a>00068 } |
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79 <a name="l00069"></a>00069 |
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80 <a name="l00070"></a>00070 <span class="comment">// Implementing MDataSource</span> |
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81 <a name="l00071"></a>00071 |
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82 <a name="l00072"></a>00072 <span class="comment">// Handle request to fill buffer with data from clip</span> |
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83 <a name="l00073"></a>00073 <span class="keywordtype">void</span> CMMFRawFormatRead::FillBufferL(CMMFBuffer* aBuffer, MDataSink* aConsumer, TMediaId aMediaId ) |
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84 <a name="l00074"></a>00074 { |
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85 <a name="l00075"></a>00075 <span class="comment">// check media id & pass onto the clip</span> |
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86 <a name="l00076"></a>00076 <span class="keywordflow">if</span> (aMediaId.iMediaType != KUidMediaTypeAudio) User::Leave(KErrNotSupported); |
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87 <a name="l00077"></a>00077 iDataPath = aConsumer; |
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88 <a name="l00078"></a>00078 <span class="comment">//assumes first frame is frame 1</span> |
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89 <a name="l00079"></a>00079 TUint position = ((aBuffer->FrameNumber()-1)*iFrameSize)+iStartPosition; |
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90 <a name="l00080"></a>00080 (<span class="keyword">static_cast<</span>CMMFClip*<span class="keyword">></span>(iClip))->ReadBufferL(aBuffer, position, <span class="keyword">this</span>); |
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91 <a name="l00081"></a>00081 <span class="comment">// notified of when buffer is full by BufferFilledL</span> |
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92 <a name="l00082"></a>00082 } |
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93 <a name="l00083"></a>00083 |
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94 <a name="l00084"></a>00084 <span class="comment">// creates the buffer for the source</span> |
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95 <a name="l00085"></a>00085 <span class="comment">// This overload supplies the sink buffer, as optimal source buffer size creation may depend on this</span> |
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96 <a name="l00086"></a>00086 CMMFBuffer* CMMFRawFormatRead::CreateSourceBufferL(TMediaId aMediaId, CMMFBuffer& aSinkBuffer, TBool &aReference) |
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97 <a name="l00087"></a>00087 { |
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98 <a name="l00088"></a>00088 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) |
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99 <a name="l00089"></a>00089 { |
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100 <a name="l00090"></a>00090 NegotiateSourceBufferL(aSinkBuffer); <span class="comment">//sets frame size to match sink buffer</span> |
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101 <a name="l00091"></a>00091 <span class="keywordflow">return</span> CreateSourceBufferL(aMediaId, aReference); |
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102 <a name="l00092"></a>00092 } |
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103 <a name="l00093"></a>00093 <span class="keywordflow">else</span> User::Leave(KErrNotSupported); |
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104 <a name="l00094"></a>00094 <span class="keywordflow">return</span> NULL; |
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105 <a name="l00095"></a>00095 } |
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106 <a name="l00096"></a>00096 |
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107 <a name="l00097"></a>00097 <span class="comment">// creates the buffer for the source</span> |
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108 <a name="l00098"></a>00098 CMMFBuffer* CMMFRawFormatRead::CreateSourceBufferL(TMediaId aMediaId, TBool &aReference) |
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109 <a name="l00099"></a>00099 { |
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110 <a name="l00100"></a>00100 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) |
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111 <a name="l00101"></a>00101 { |
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112 <a name="l00102"></a>00102 <span class="comment">// assume default frame size if haven't determined a better one</span> |
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113 <a name="l00103"></a>00103 <span class="keywordflow">if</span> (!iFrameSize) iFrameSize = KFormatDefaultFrameSize; |
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114 <a name="l00104"></a>00104 <span class="comment">// sets aReference to false if a new CMMFBuffer is returned</span> |
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115 <a name="l00105"></a>00105 aReference = EFalse; |
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116 <a name="l00106"></a>00106 <span class="keywordflow">return</span> CreateSourceBufferOfSizeL(iFrameSize); |
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117 <a name="l00107"></a>00107 } |
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118 <a name="l00108"></a>00108 <span class="keywordflow">else</span> User::Leave(KErrNotSupported); |
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119 <a name="l00109"></a>00109 <span class="keywordflow">return</span> NULL; |
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120 <a name="l00110"></a>00110 } |
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121 <a name="l00111"></a>00111 |
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122 <a name="l00112"></a>00112 <span class="comment">// Helper function to create and zero fill a buffer of specified size</span> |
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123 <a name="l00113"></a>00113 CMMFDataBuffer* CMMFRawFormatRead::CreateSourceBufferOfSizeL(TUint aSize) |
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124 <a name="l00114"></a>00114 { |
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125 <a name="l00115"></a>00115 <span class="comment">//needs to create source buffer</span> |
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126 <a name="l00116"></a>00116 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(aSize); |
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127 <a name="l00117"></a>00117 buffer->Data().FillZ(aSize); |
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128 <a name="l00118"></a>00118 <span class="keywordflow">return</span> buffer; |
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129 <a name="l00119"></a>00119 } |
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130 <a name="l00120"></a>00120 |
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131 <a name="l00121"></a>00121 <span class="comment">// Helper function to determine best source buffer size</span> |
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132 <a name="l00122"></a>00122 <span class="keywordtype">void</span> CMMFRawFormatRead::NegotiateSourceBufferL(CMMFBuffer& aSinkBuffer) |
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133 <a name="l00123"></a>00123 { |
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134 <a name="l00124"></a>00124 <span class="comment">// if sink buffer has a fixed size use this to determine source buffer size</span> |
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135 <a name="l00125"></a>00125 <span class="keywordflow">if</span> (aSinkBuffer.Type() == KUidMmfDataBuffer) |
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136 <a name="l00126"></a>00126 { |
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137 <a name="l00127"></a>00127 <span class="comment">// RAW is linear data, so can set target buffer to sink buffer size</span> |
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138 <a name="l00128"></a>00128 TUint sinkBufferLength = (<span class="keyword">static_cast<</span>CMMFDataBuffer&<span class="keyword">></span>(aSinkBuffer)).Data().MaxLength(); |
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139 <a name="l00129"></a>00129 <span class="keywordflow">if</span> (sinkBufferLength == 0) sinkBufferLength = KFormatDefaultFrameSize; |
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140 <a name="l00130"></a>00130 iFrameSize = sinkBufferLength; |
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141 <a name="l00131"></a>00131 CalculateFrameTimeInterval(); |
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142 <a name="l00132"></a>00132 } |
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143 <a name="l00133"></a>00133 <span class="keywordflow">else</span> |
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144 <a name="l00134"></a>00134 User::Leave(KErrNotSupported); |
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145 <a name="l00135"></a>00135 } |
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146 <a name="l00136"></a>00136 |
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147 <a name="l00137"></a>00137 <span class="comment">// returns the codec FourCC code for the mediaId</span> |
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148 <a name="l00138"></a>00138 TFourCC CMMFRawFormatRead::SourceDataTypeCode(TMediaId aMediaId) |
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149 <a name="l00139"></a>00139 { |
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150 <a name="l00140"></a>00140 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) <span class="keywordflow">return</span> iFourCC; |
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151 <a name="l00141"></a>00141 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TFourCC(); <span class="comment">//defaults to 'NULL' fourCC</span> |
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152 <a name="l00142"></a>00142 } |
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153 <a name="l00143"></a>00143 |
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154 <a name="l00144"></a>00144 <span class="comment">// sets the codec FourCC code for the mediaId</span> |
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155 <a name="l00145"></a>00145 TInt CMMFRawFormatRead::SetSourceDataTypeCode(TFourCC aSinkFourCC, TMediaId aMediaId) |
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156 <a name="l00146"></a>00146 { |
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157 <a name="l00147"></a>00147 <span class="keywordflow">if</span> (aMediaId.iMediaType != KUidMediaTypeAudio) <span class="keywordflow">return</span> KErrNotSupported; |
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158 <a name="l00148"></a>00148 <span class="keywordflow">else</span> iFourCC = aSinkFourCC; |
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159 <a name="l00149"></a>00149 |
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160 <a name="l00150"></a>00150 <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodePCM16) || |
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161 <a name="l00151"></a>00151 (iFourCC == KMMFFourCCCodePCM16B) || |
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162 <a name="l00152"></a>00152 (iFourCC == KMMFFourCCCodePCMU16)) |
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163 <a name="l00153"></a>00153 iBitsPerSample = 16; |
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164 <a name="l00154"></a>00154 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodeIMAD) || |
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165 <a name="l00155"></a>00155 (iFourCC == KMMFFourCCCodeIMAS)) |
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166 <a name="l00156"></a>00156 iBitsPerSample = 4; |
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167 <a name="l00157"></a>00157 <span class="keywordflow">else</span> |
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168 <a name="l00158"></a>00158 iBitsPerSample = 8; <span class="comment">//default to 8</span> |
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169 <a name="l00159"></a>00159 <span class="keywordflow">return</span> KErrNone; |
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170 <a name="l00160"></a>00160 } |
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171 <a name="l00161"></a>00161 |
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172 <a name="l00162"></a>00162 <span class="comment">// Initiate use of the interface </span> |
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173 <a name="l00163"></a>00163 TInt CMMFRawFormatRead::SourceThreadLogon(MAsyncEventHandler& aEventHandler) |
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174 <a name="l00164"></a>00164 {<span class="comment">//pass through to source clip</span> |
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175 <a name="l00165"></a>00165 <span class="keywordflow">return</span>(iClip->SourceThreadLogon(aEventHandler)); |
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176 <a name="l00166"></a>00166 } |
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177 <a name="l00167"></a>00167 |
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178 <a name="l00168"></a>00168 <span class="comment">// Prepare clip</span> |
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179 <a name="l00169"></a>00169 <span class="keywordtype">void</span> CMMFRawFormatRead::SourcePrimeL() |
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180 <a name="l00170"></a>00170 { |
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181 <a name="l00171"></a>00171 iClip->SourcePrimeL(); |
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182 <a name="l00172"></a>00172 CalculateFrameTimeInterval(); |
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183 <a name="l00173"></a>00173 } |
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184 <a name="l00174"></a>00174 |
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185 <a name="l00175"></a>00175 <span class="comment">// Play clip</span> |
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186 <a name="l00176"></a>00176 <span class="keywordtype">void</span> CMMFRawFormatRead::SourcePlayL() |
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187 <a name="l00177"></a>00177 { |
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188 <a name="l00178"></a>00178 iClip->SourcePlayL(); |
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189 <a name="l00179"></a>00179 } |
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190 <a name="l00180"></a>00180 |
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191 <a name="l00181"></a>00181 <span class="comment">// Pause clip</span> |
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192 <a name="l00182"></a>00182 <span class="keywordtype">void</span> CMMFRawFormatRead::SourcePauseL() |
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193 <a name="l00183"></a>00183 { |
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194 <a name="l00184"></a>00184 iClip->SourcePauseL(); <span class="comment">//propagate state change down to clip</span> |
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195 <a name="l00185"></a>00185 } |
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196 <a name="l00186"></a>00186 |
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197 <a name="l00187"></a>00187 <span class="comment">// Stop clip</span> |
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198 <a name="l00188"></a>00188 <span class="keywordtype">void</span> CMMFRawFormatRead::SourceStopL() |
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199 <a name="l00189"></a>00189 { |
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200 <a name="l00190"></a>00190 iClip->SourceStopL(); |
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201 <a name="l00191"></a>00191 } |
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202 <a name="l00192"></a>00192 |
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203 <a name="l00193"></a>00193 <span class="comment">// End use of the interface</span> |
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204 <a name="l00194"></a>00194 <span class="keywordtype">void</span> CMMFRawFormatRead::SourceThreadLogoff() |
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205 <a name="l00195"></a>00195 { |
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206 <a name="l00196"></a>00196 iClip->SourceThreadLogoff(); |
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207 <a name="l00197"></a>00197 } |
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208 <a name="l00198"></a>00198 |
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209 <a name="l00199"></a>00199 <span class="comment">// from MDataSink</span> |
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210 <a name="l00200"></a>00200 |
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211 <a name="l00201"></a>00201 <span class="comment">// called by MDataSource to pass back full buffer to the sink</span> |
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212 <a name="l00202"></a>00202 <span class="keywordtype">void</span> CMMFRawFormatRead::BufferFilledL(CMMFBuffer* aBuffer) |
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213 <a name="l00203"></a>00203 { |
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214 <a name="l00204"></a>00204 <span class="comment">//set position</span> |
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215 <a name="l00205"></a>00205 TTimeIntervalMicroSeconds position = <span class="comment">//assumes frame numbers begin at frame 1</span> |
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216 <a name="l00206"></a>00206 TTimeIntervalMicroSeconds(TInt64(aBuffer->FrameNumber()-1)*iFrameTimeInterval.Int64()); |
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217 <a name="l00207"></a>00207 aBuffer->SetTimeToPlay(position); |
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218 <a name="l00208"></a>00208 iDataPath->BufferFilledL(aBuffer); |
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219 <a name="l00209"></a>00209 } |
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220 <a name="l00210"></a>00210 |
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221 <a name="l00211"></a>00211 |
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222 <a name="l00212"></a>00212 <span class="comment">// from CMMFFormatDecode</span> |
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223 <a name="l00213"></a>00213 |
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224 <a name="l00214"></a>00214 <span class="comment">// returns number of streams</span> |
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225 <a name="l00215"></a>00215 TUint CMMFRawFormatRead::Streams(TUid aMediaType)<span class="keyword"> const</span> |
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226 <a name="l00216"></a>00216 <span class="keyword"> </span>{ |
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227 <a name="l00217"></a>00217 <span class="comment">//need to check aMediaType for audio</span> |
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228 <a name="l00218"></a>00218 <span class="keywordflow">if</span> (aMediaType == KUidMediaTypeAudio) <span class="keywordflow">return</span> 1; <span class="comment">//raw files can only have 1 audio stream</span> |
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229 <a name="l00219"></a>00219 <span class="keywordflow">else</span> <span class="keywordflow">return</span> 0; |
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230 <a name="l00220"></a>00220 } |
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231 <a name="l00221"></a>00221 |
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232 <a name="l00222"></a>00222 <span class="comment">// returns the time interval for one frame</span> |
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233 <a name="l00223"></a>00223 TTimeIntervalMicroSeconds CMMFRawFormatRead::FrameTimeInterval(TMediaId aMediaId)<span class="keyword"> const</span> |
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234 <a name="l00224"></a>00224 <span class="keyword"> </span>{ |
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235 <a name="l00225"></a>00225 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) <span class="keywordflow">return</span> iFrameTimeInterval; |
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236 <a name="l00226"></a>00226 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TTimeIntervalMicroSeconds(0); |
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237 <a name="l00227"></a>00227 } |
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238 <a name="l00228"></a>00228 |
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239 <a name="l00229"></a>00229 <span class="comment">// returns the duration of the source clip</span> |
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240 <a name="l00230"></a>00230 TTimeIntervalMicroSeconds CMMFRawFormatRead::Duration(TMediaId aMediaId)<span class="keyword"> const</span> |
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241 <a name="l00231"></a>00231 <span class="keyword"> </span>{ |
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242 <a name="l00232"></a>00232 <span class="keywordflow">if</span> ((aMediaId.iMediaType == KUidMediaTypeAudio) && |
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243 <a name="l00233"></a>00233 (iClipLength) && (iSampleRate) && (iBitsPerSample) && (iChannels)) |
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244 <a name="l00234"></a>00234 {<span class="comment">//we have enough values to calculate the duration</span> |
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245 <a name="l00235"></a>00235 TInt64 clipLength(iClipLength); |
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246 <a name="l00236"></a>00236 clipLength*=KOneSecondInMicroSeconds; |
|
247 <a name="l00237"></a>00237 TTimeIntervalMicroSeconds duration = TTimeIntervalMicroSeconds(clipLength/iSampleRate); |
|
248 <a name="l00238"></a>00238 duration = TTimeIntervalMicroSeconds(duration.Int64()/(iBitsPerSample*iChannels)); |
|
249 <a name="l00239"></a>00239 duration = TTimeIntervalMicroSeconds(duration.Int64()*8); |
|
250 <a name="l00240"></a>00240 <span class="keywordflow">return</span> duration; |
|
251 <a name="l00241"></a>00241 } |
|
252 <a name="l00242"></a>00242 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TTimeIntervalMicroSeconds(0); |
|
253 <a name="l00243"></a>00243 } |
|
254 <a name="l00244"></a>00244 |
|
255 <a name="l00245"></a>00245 <span class="comment">// helper function: calculates time between frames</span> |
|
256 <a name="l00246"></a>00246 <span class="keywordtype">void</span> CMMFRawFormatRead::CalculateFrameTimeInterval() |
|
257 <a name="l00247"></a>00247 { |
|
258 <a name="l00248"></a>00248 <span class="keywordflow">if</span> ((iFrameSize) && (iSampleRate) && (iBitsPerSample) && (iChannels)) |
|
259 <a name="l00249"></a>00249 { |
|
260 <a name="l00250"></a>00250 iFrameTimeInterval = TTimeIntervalMicroSeconds((iFrameSize*KOneSecondInMicroSeconds)/iSampleRate); |
|
261 <a name="l00251"></a>00251 iFrameTimeInterval = |
|
262 <a name="l00252"></a>00252 TTimeIntervalMicroSeconds(iFrameTimeInterval.Int64()/(iBitsPerSample*iChannels)); |
|
263 <a name="l00253"></a>00253 iFrameTimeInterval = TTimeIntervalMicroSeconds(iFrameTimeInterval.Int64()*8); |
|
264 <a name="l00254"></a>00254 } |
|
265 <a name="l00255"></a>00255 } |
|
266 <a name="l00256"></a>00256 |
|
267 <a name="l00257"></a>00257 <span class="comment">// called by sink to suggest a source buffer size</span> |
|
268 <a name="l00258"></a>00258 <span class="keywordtype">void</span> CMMFRawFormatRead::SuggestSourceBufferSize(TUint aSuggestedBufferSize) |
|
269 <a name="l00259"></a>00259 { |
|
270 <a name="l00260"></a>00260 iFrameSize = aSuggestedBufferSize; <span class="comment">//set source format frame size to buffer size suggested by sink</span> |
|
271 <a name="l00261"></a>00261 CalculateFrameTimeInterval(); |
|
272 <a name="l00262"></a>00262 } |
|
273 <a name="l00263"></a>00263 |
|
274 <a name="l00264"></a>00264 <span class="comment">// set the number of channels</span> |
|
275 <a name="l00265"></a>00265 TInt CMMFRawFormatRead::SetNumChannels(TUint aChannels) |
|
276 <a name="l00266"></a>00266 { |
|
277 <a name="l00267"></a>00267 TInt error = KErrNone; |
|
278 <a name="l00268"></a>00268 <span class="keywordflow">if</span> ((aChannels == KMono)||(aChannels == KStereo)) iChannels = aChannels; |
|
279 <a name="l00269"></a>00269 <span class="keywordflow">else</span> error = KErrNotSupported; <span class="comment">//only alow one or two channels</span> |
|
280 <a name="l00270"></a>00270 <span class="keywordflow">return</span> error; |
|
281 <a name="l00271"></a>00271 } |
|
282 <a name="l00272"></a>00272 |
|
283 <a name="l00273"></a>00273 <span class="comment">// set the sample rate</span> |
|
284 <a name="l00274"></a>00274 TInt CMMFRawFormatRead::SetSampleRate(TUint aSampleRate) |
|
285 <a name="l00275"></a>00275 { |
|
286 <a name="l00276"></a>00276 TInt status = KErrNotSupported; |
|
287 <a name="l00277"></a>00277 <span class="comment">//we'll iterate through the valid sample table</span> |
|
288 <a name="l00278"></a>00278 TInt i = <span class="keyword">sizeof</span>(KRawSampleRates) / <span class="keyword">sizeof</span>(TUint); |
|
289 <a name="l00279"></a>00279 |
|
290 <a name="l00280"></a>00280 <span class="keywordflow">while</span> ((i--) && (status != KErrNone)) |
|
291 <a name="l00281"></a>00281 { |
|
292 <a name="l00282"></a>00282 <span class="keywordflow">if</span> (aSampleRate == KRawSampleRates[i]) |
|
293 <a name="l00283"></a>00283 { |
|
294 <a name="l00284"></a>00284 iSampleRate = aSampleRate; |
|
295 <a name="l00285"></a>00285 status = KErrNone; |
|
296 <a name="l00286"></a>00286 } |
|
297 <a name="l00287"></a>00287 } |
|
298 <a name="l00288"></a>00288 <span class="keywordflow">return</span> status; |
|
299 <a name="l00289"></a>00289 } |
|
300 <a name="l00290"></a>00290 |
|
301 <a name="l00291"></a>00291 <span class="comment">// helper function to read from clip</span> |
|
302 <a name="l00292"></a>00292 <span class="keywordtype">void</span> CMMFRawFormatRead::DoReadL(TInt aReadPosition) |
|
303 <a name="l00293"></a>00293 { |
|
304 <a name="l00294"></a>00294 STATIC_CAST(CMMFClip*,iClip)->ReadBufferL(iBuffer,aReadPosition); |
|
305 <a name="l00295"></a>00295 } |
|
306 <a name="l00296"></a>00296 |
|
307 <a name="l00297"></a>00297 <span class="comment">// get the supported sample rates</span> |
|
308 <a name="l00298"></a>00298 <span class="keywordtype">void</span> CMMFRawFormatRead::GetSupportedSampleRatesL(RArray<TUint>& aSampleRates) |
|
309 <a name="l00299"></a>00299 { |
|
310 <a name="l00300"></a>00300 aSampleRates.Reset(); |
|
311 <a name="l00301"></a>00301 |
|
312 <a name="l00302"></a>00302 <span class="comment">// Iterate through the valid sample table and append each value to aSampleRates</span> |
|
313 <a name="l00303"></a>00303 TInt i = <span class="keyword">sizeof</span>(KRawSampleRates) / <span class="keyword">sizeof</span>(TUint); |
|
314 <a name="l00304"></a>00304 |
|
315 <a name="l00305"></a>00305 <span class="keywordflow">while</span> (i--) |
|
316 <a name="l00306"></a>00306 { |
|
317 <a name="l00307"></a>00307 User::LeaveIfError(aSampleRates.Append(KRawSampleRates[i])); |
|
318 <a name="l00308"></a>00308 } |
|
319 <a name="l00309"></a>00309 } |
|
320 <a name="l00310"></a>00310 |
|
321 <a name="l00311"></a>00311 <span class="comment">// get the supported channel number options</span> |
|
322 <a name="l00312"></a>00312 <span class="keywordtype">void</span> CMMFRawFormatRead::GetSupportedNumChannelsL(RArray<TUint>& aNumChannels) |
|
323 <a name="l00313"></a>00313 { |
|
324 <a name="l00314"></a>00314 aNumChannels.Reset(); |
|
325 <a name="l00315"></a>00315 User::LeaveIfError(aNumChannels.Append(KMono)); |
|
326 <a name="l00316"></a>00316 User::LeaveIfError(aNumChannels.Append(KStereo)); |
|
327 <a name="l00317"></a>00317 } |
|
328 <a name="l00318"></a>00318 |
|
329 <a name="l00319"></a>00319 <span class="comment">// get the supported codecs</span> |
|
330 <a name="l00320"></a>00320 <span class="keywordtype">void</span> CMMFRawFormatRead::GetSupportedDataTypesL(TMediaId aMediaId, RArray<TFourCC>& aDataTypes) |
|
331 <a name="l00321"></a>00321 { |
|
332 <a name="l00322"></a>00322 <span class="keywordflow">if</span> (aMediaId.iMediaType != KUidMediaTypeAudio) |
|
333 <a name="l00323"></a>00323 User::Leave(KErrNotSupported); |
|
334 <a name="l00324"></a>00324 aDataTypes.Reset(); |
|
335 <a name="l00325"></a>00325 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCM16)); |
|
336 <a name="l00326"></a>00326 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCM16B)); |
|
337 <a name="l00327"></a>00327 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCMU16)); |
|
338 <a name="l00328"></a>00328 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodeIMAD)); |
|
339 <a name="l00329"></a>00329 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodeIMAS)); |
|
340 <a name="l00330"></a>00330 } |
|
341 <a name="l00331"></a>00331 |
|
342 <a name="l00332"></a>00332 |
|
343 <a name="l00333"></a>00333 <span class="comment">//</span> |
|
344 <a name="l00334"></a>00334 <span class="comment">// CMMFRawFormatWrite</span> |
|
345 <a name="l00335"></a>00335 <span class="comment">//</span> |
|
346 <a name="l00336"></a>00336 |
|
347 <a name="l00337"></a>00337 <span class="comment">// Factory function</span> |
|
348 <a name="l00338"></a>00338 CMMFFormatEncode* CMMFRawFormatWrite::NewL(MDataSink* aSink) |
|
349 <a name="l00339"></a>00339 { |
|
350 <a name="l00340"></a>00340 <span class="keywordflow">if</span> ((aSink->DataSinkType()==KUidMmfDescriptorSink)|| |
|
351 <a name="l00341"></a>00341 (aSink->DataSinkType()==KUidMmfFileSink)) |
|
352 <a name="l00342"></a>00342 {<span class="comment">//currently only files and descriptor MDataSources are supported</span> |
|
353 <a name="l00343"></a>00343 <a class="code" href="class_c_m_m_f_raw_format_write.html">CMMFRawFormatWrite</a>* <span class="keyword">self</span> = <span class="keyword">new</span>(ELeave)<a class="code" href="class_c_m_m_f_raw_format_write.html">CMMFRawFormatWrite</a>; |
|
354 <a name="l00344"></a>00344 CleanupStack::PushL(<span class="keyword">self</span>); |
|
355 <a name="l00345"></a>00345 <span class="keyword">self</span>->ConstructL(aSink); |
|
356 <a name="l00346"></a>00346 CleanupStack::Pop(); |
|
357 <a name="l00347"></a>00347 <span class="keywordflow">return</span> STATIC_CAST(CMMFFormatEncode*, <span class="keyword">self</span>); |
|
358 <a name="l00348"></a>00348 } |
|
359 <a name="l00349"></a>00349 <span class="keywordflow">else</span> <span class="keywordflow">return</span> NULL; |
|
360 <a name="l00350"></a>00350 } |
|
361 <a name="l00351"></a>00351 |
|
362 <a name="l00352"></a>00352 <span class="comment">// destructor</span> |
|
363 <a name="l00353"></a>00353 CMMFRawFormatWrite::~CMMFRawFormatWrite() |
|
364 <a name="l00354"></a>00354 { |
|
365 <a name="l00355"></a>00355 <span class="keyword">delete</span> iBuffer; |
|
366 <a name="l00356"></a>00356 <span class="keyword">delete</span> iConvertBuffer; |
|
367 <a name="l00357"></a>00357 <span class="keyword">delete</span> iChannelAndSampleRateConverterFactory; |
|
368 <a name="l00358"></a>00358 } |
|
369 <a name="l00359"></a>00359 |
|
370 <a name="l00360"></a>00360 <span class="comment">// second-phase construction </span> |
|
371 <a name="l00361"></a>00361 <span class="keywordtype">void</span> CMMFRawFormatWrite::ConstructL(MDataSink* aSink) |
|
372 <a name="l00362"></a>00362 { |
|
373 <a name="l00363"></a>00363 iClip = aSink; |
|
374 <a name="l00364"></a>00364 <span class="comment">//first need to check if sink clip already exists to get settings.</span> |
|
375 <a name="l00365"></a>00365 User::LeaveIfError(iClip->SinkThreadLogon(*<span class="keyword">this</span>)); |
|
376 <a name="l00366"></a>00366 iClip->SinkPrimeL(); |
|
377 <a name="l00367"></a>00367 iBuffer = CreateSinkBufferOfSizeL(KDefineIOBufferSize); <span class="comment">//512 easiest file size to read</span> |
|
378 <a name="l00368"></a>00368 DoReadL(0);<span class="comment">//read from beginning of clip</span> |
|
379 <a name="l00369"></a>00369 <span class="keywordflow">if</span> (iBuffer->Data().Size()> 0) |
|
380 <a name="l00370"></a>00370 { |
|
381 <a name="l00371"></a>00371 iClipAlreadyExists = ETrue; |
|
382 <a name="l00372"></a>00372 <span class="comment">//There is no header, so data size is the same as the clip size in this case.</span> |
|
383 <a name="l00373"></a>00373 iDataSize = iClipLength = STATIC_CAST(CMMFClip*,iClip)->Size(); |
|
384 <a name="l00374"></a>00374 } |
|
385 <a name="l00375"></a>00375 iFrameSize = KFormatDefaultFrameSize; |
|
386 <a name="l00376"></a>00376 } |
|
387 <a name="l00377"></a>00377 |
|
388 <a name="l00378"></a>00378 <span class="comment">// from MDataSink</span> |
|
389 <a name="l00379"></a>00379 |
|
390 <a name="l00380"></a>00380 <span class="comment">// sink thread attaches</span> |
|
391 <a name="l00381"></a>00381 TInt CMMFRawFormatWrite::SinkThreadLogon(MAsyncEventHandler& aEventHandler) |
|
392 <a name="l00382"></a>00382 {<span class="comment">//pass through to sink clip</span> |
|
393 <a name="l00383"></a>00383 <span class="keywordflow">return</span>(iClip->SinkThreadLogon(aEventHandler)); |
|
394 <a name="l00384"></a>00384 } |
|
395 <a name="l00385"></a>00385 |
|
396 <a name="l00386"></a>00386 <span class="comment">// helper function: calculates time between frames</span> |
|
397 <a name="l00387"></a>00387 <span class="keywordtype">void</span> CMMFRawFormatWrite::CalculateFrameTimeInterval() |
|
398 <a name="l00388"></a>00388 { |
|
399 <a name="l00389"></a>00389 <span class="keywordflow">if</span> ((iFrameSize) && (iSampleRate) && (iBitsPerSample) && (iChannels)) |
|
400 <a name="l00390"></a>00390 { |
|
401 <a name="l00391"></a>00391 iFrameTimeInterval = TTimeIntervalMicroSeconds((iFrameSize*KOneSecondInMicroSeconds)/iSampleRate); |
|
402 <a name="l00392"></a>00392 iFrameTimeInterval = |
|
403 <a name="l00393"></a>00393 TTimeIntervalMicroSeconds((iFrameTimeInterval.Int64())/(iBitsPerSample*iChannels)); |
|
404 <a name="l00394"></a>00394 iFrameTimeInterval = TTimeIntervalMicroSeconds(iFrameTimeInterval.Int64()*8); |
|
405 <a name="l00395"></a>00395 } |
|
406 <a name="l00396"></a>00396 } |
|
407 <a name="l00397"></a>00397 |
|
408 <a name="l00398"></a>00398 <span class="comment">// called if sink setup depends on source</span> |
|
409 <a name="l00399"></a>00399 <span class="keywordtype">void</span> CMMFRawFormatWrite::Negotiate(MDataSource& aSource) |
|
410 <a name="l00400"></a>00400 { |
|
411 <a name="l00401"></a>00401 <span class="keywordflow">if</span> (aSource.DataSourceType() == KUidMmfAudioInput) |
|
412 <a name="l00402"></a>00402 { |
|
413 <a name="l00403"></a>00403 <span class="comment">// could query the audio capabilities from DevSound for the settings below</span> |
|
414 <a name="l00404"></a>00404 iSourceSampleRate = 8000; <span class="comment">// assume 8KHz for now</span> |
|
415 <a name="l00405"></a>00405 iSourceChannels = 1; <span class="comment">//assume mono</span> |
|
416 <a name="l00406"></a>00406 iSourceFourCC.Set(KMMFFourCCCodePCM16); <span class="comment">//16 bit PCM</span> |
|
417 <a name="l00407"></a>00407 } |
|
418 <a name="l00408"></a>00408 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (aSource.DataSourceType() == KUidMmfFormatDecode) |
|
419 <a name="l00409"></a>00409 {<span class="comment">//source is a clip so for now set sink settings to match source</span> |
|
420 <a name="l00410"></a>00410 iSourceSampleRate = ((CMMFFormatDecode&)aSource).SampleRate(); |
|
421 <a name="l00411"></a>00411 iSourceChannels = ((CMMFFormatDecode&)aSource).NumChannels(); |
|
422 <a name="l00412"></a>00412 iSourceFourCC.Set(aSource.SourceDataTypeCode(TMediaId(KUidMediaTypeAudio))); |
|
423 <a name="l00413"></a>00413 iSourceWillSampleConvert = STATIC_CAST(CMMFFormatDecode&, aSource).SourceSampleConvert(); |
|
424 <a name="l00414"></a>00414 ((CMMFFormatDecode&)aSource).SuggestSourceBufferSize(iFrameSize); <span class="comment">//for now suggest format src takes same buf size as sink??</span> |
|
425 <a name="l00415"></a>00415 <span class="comment">//make the start position the end of the clip</span> |
|
426 <a name="l00416"></a>00416 } |
|
427 <a name="l00417"></a>00417 <span class="keywordflow">else</span> <span class="keywordflow">return</span>; |
|
428 <a name="l00418"></a>00418 <span class="comment">//set default sink parameters to be the same as the source</span> |
|
429 <a name="l00419"></a>00419 <span class="keywordflow">if</span> (iClipAlreadyExists) iStartPosition = iClipLength; |
|
430 <a name="l00420"></a>00420 <span class="keywordflow">if</span> (!iSampleRate) iSampleRate = iSourceSampleRate; <span class="comment">//might have already been set by custom command</span> |
|
431 <a name="l00421"></a>00421 <span class="keywordflow">if</span> (!iChannels) iChannels = iSourceChannels; |
|
432 <a name="l00422"></a>00422 <span class="keywordflow">if</span> (!iBitsPerSample) |
|
433 <a name="l00423"></a>00423 { |
|
434 <a name="l00424"></a>00424 iFourCC.Set(iSourceFourCC); |
|
435 <a name="l00425"></a>00425 <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodePCM16) || |
|
436 <a name="l00426"></a>00426 (iFourCC == KMMFFourCCCodePCM16B) || |
|
437 <a name="l00427"></a>00427 (iFourCC == KMMFFourCCCodePCMU16)) |
|
438 <a name="l00428"></a>00428 iBitsPerSample = 16; |
|
439 <a name="l00429"></a>00429 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodeIMAD) || |
|
440 <a name="l00430"></a>00430 (iFourCC == KMMFFourCCCodeIMAS)) |
|
441 <a name="l00431"></a>00431 iBitsPerSample = 4; |
|
442 <a name="l00432"></a>00432 <span class="keywordflow">else</span> |
|
443 <a name="l00433"></a>00433 iBitsPerSample = 8; <span class="comment">//default to 8</span> |
|
444 <a name="l00434"></a>00434 } |
|
445 <a name="l00435"></a>00435 CalculateFrameTimeInterval(); |
|
446 <a name="l00436"></a>00436 } |
|
447 <a name="l00437"></a>00437 |
|
448 <a name="l00438"></a>00438 <span class="comment">// Prime the sink to be accessed</span> |
|
449 <a name="l00439"></a>00439 <span class="keywordtype">void</span> CMMFRawFormatWrite::SinkPrimeL() |
|
450 <a name="l00440"></a>00440 { |
|
451 <a name="l00441"></a>00441 iClip->SinkPrimeL(); <span class="comment">//propagate state change down to clip</span> |
|
452 <a name="l00442"></a>00442 CalculateFrameTimeInterval(); |
|
453 <a name="l00443"></a>00443 } |
|
454 <a name="l00444"></a>00444 |
|
455 <a name="l00445"></a>00445 <span class="comment">// Play the sink</span> |
|
456 <a name="l00446"></a>00446 <span class="keywordtype">void</span> CMMFRawFormatWrite::SinkPlayL() |
|
457 <a name="l00447"></a>00447 { |
|
458 <a name="l00448"></a>00448 iClip->SinkPlayL(); <span class="comment">//propagate state change down to clip</span> |
|
459 <a name="l00449"></a>00449 <span class="keywordflow">if</span> ((iChannels != iSourceChannels) || (iSampleRate != iSourceSampleRate) && (!iSourceWillSampleConvert)) |
|
460 <a name="l00450"></a>00450 {<span class="comment">//the source channels & sample rate don't match the formats - therefore need to do a conversion </span> |
|
461 <a name="l00451"></a>00451 <span class="comment">//currently only pcm16 is supported so return with an error if format not pcm16</span> |
|
462 <a name="l00452"></a>00452 <span class="keywordflow">if</span> (iFourCC != KMMFFourCCCodePCM16) User::Leave(KErrNotSupported); |
|
463 <a name="l00453"></a>00453 iChannelAndSampleRateConverterFactory |
|
464 <a name="l00454"></a>00454 = <span class="keyword">new</span>(ELeave)CMMFChannelAndSampleRateConverterFactory; |
|
465 <a name="l00455"></a>00455 iChannelAndSampleRateConverter = |
|
466 <a name="l00456"></a>00456 iChannelAndSampleRateConverterFactory->CreateConverterL( iSourceSampleRate, iSourceChannels, |
|
467 <a name="l00457"></a>00457 iSampleRate, iChannels); |
|
468 <a name="l00458"></a>00458 <span class="comment">//need to create an intermediate buffer in which to place the converted data</span> |
|
469 <a name="l00459"></a>00459 TUint convertedBufferFrameSize = (iFrameSize*iChannels)/iSourceChannels; |
|
470 <a name="l00460"></a>00460 iConvertBuffer = CreateSinkBufferOfSizeL(convertedBufferFrameSize); |
|
471 <a name="l00461"></a>00461 } |
|
472 <a name="l00462"></a>00462 iFileHasChanged = ETrue; <span class="comment">//file will change if we start playing to it</span> |
|
473 <a name="l00463"></a>00463 } |
|
474 <a name="l00464"></a>00464 |
|
475 <a name="l00465"></a>00465 <span class="comment">// Pause the sink</span> |
|
476 <a name="l00466"></a>00466 <span class="keywordtype">void</span> CMMFRawFormatWrite::SinkPauseL() |
|
477 <a name="l00467"></a>00467 { |
|
478 <a name="l00468"></a>00468 iClip->SinkPauseL(); <span class="comment">//propagate state change down to clip</span> |
|
479 <a name="l00469"></a>00469 } |
|
480 <a name="l00470"></a>00470 |
|
481 <a name="l00471"></a>00471 <span class="comment">// Stop the sink</span> |
|
482 <a name="l00472"></a>00472 <span class="keywordtype">void</span> CMMFRawFormatWrite::SinkStopL() |
|
483 <a name="l00473"></a>00473 { |
|
484 <a name="l00474"></a>00474 iClip->SinkStopL(); <span class="comment">//propagate state change down to clip</span> |
|
485 <a name="l00475"></a>00475 } |
|
486 <a name="l00476"></a>00476 |
|
487 <a name="l00477"></a>00477 <span class="comment">// Detach from the sink</span> |
|
488 <a name="l00478"></a>00478 <span class="keywordtype">void</span> CMMFRawFormatWrite::SinkThreadLogoff() |
|
489 <a name="l00479"></a>00479 { |
|
490 <a name="l00480"></a>00480 iClip->SinkThreadLogoff(); <span class="comment">//propagate down to clip</span> |
|
491 <a name="l00481"></a>00481 } |
|
492 <a name="l00482"></a>00482 |
|
493 <a name="l00483"></a>00483 <span class="comment">// Called by the CMMFDataPath to add a buffer to a clip</span> |
|
494 <a name="l00484"></a>00484 <span class="keywordtype">void</span> CMMFRawFormatWrite::EmptyBufferL(CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId) |
|
495 <a name="l00485"></a>00485 { |
|
496 <a name="l00486"></a>00486 <span class="comment">//since raw always contains linear audio the sink buffer size can set the source buffer size</span> |
|
497 <a name="l00487"></a>00487 |
|
498 <a name="l00488"></a>00488 <span class="comment">//check media id &pass onto clip</span> |
|
499 <a name="l00489"></a>00489 <span class="keywordflow">if</span> (aMediaId.iMediaType!=KUidMediaTypeAudio) User::Leave(KErrNotSupported); |
|
500 <a name="l00490"></a>00490 iDataPath = aSupplier; |
|
501 <a name="l00491"></a>00491 |
|
502 <a name="l00492"></a>00492 <span class="comment">// Check we haven't exceeded any set maximum on our clip length</span> |
|
503 <a name="l00493"></a>00493 <span class="keywordflow">if</span> (iMaximumClipSize > 0) |
|
504 <a name="l00494"></a>00494 { |
|
505 <a name="l00495"></a>00495 <span class="comment">// Find the current clip size</span> |
|
506 <a name="l00496"></a>00496 TInt currentClipLength = STATIC_CAST(CMMFClip*, iClip)->Size(); |
|
507 <a name="l00497"></a>00497 TInt bufferSize = aBuffer->BufferSize(); |
|
508 <a name="l00498"></a>00498 <span class="keywordflow">if</span> ((currentClipLength + bufferSize) >= iMaximumClipSize) |
|
509 <a name="l00499"></a>00499 User::Leave(KErrEof); |
|
510 <a name="l00500"></a>00500 } |
|
511 <a name="l00501"></a>00501 |
|
512 <a name="l00502"></a>00502 <span class="comment">//assumes first frame is frame 1</span> |
|
513 <a name="l00503"></a>00503 iBufferToEmpty = aBuffer; <span class="comment">//save this so it can be returned to datapath</span> |
|
514 <a name="l00504"></a>00504 TInt position = ((aBuffer->FrameNumber()-1)*iFrameSize)+iStartPosition; |
|
515 <a name="l00505"></a>00505 <span class="keywordflow">if</span> (position < (TInt)iStartPosition) position = iStartPosition; <span class="comment">//can't write before start of header</span> |
|
516 <a name="l00506"></a>00506 <span class="keywordflow">if</span> ((iChannelAndSampleRateConverter) && (!iSourceWillSampleConvert)) |
|
517 <a name="l00507"></a>00507 {<span class="comment">//need to perform channel & sample rate conversion before writing to clip</span> |
|
518 <a name="l00508"></a>00508 iFrameSize = iChannelAndSampleRateConverter->Convert(*(CMMFDataBuffer*)aBuffer,*iConvertBuffer); |
|
519 <a name="l00509"></a>00509 STATIC_CAST(CMMFClip*,iClip)->WriteBufferL(iConvertBuffer, position, <span class="keyword">this</span>); |
|
520 <a name="l00510"></a>00510 } |
|
521 <a name="l00511"></a>00511 <span class="keywordflow">else</span> |
|
522 <a name="l00512"></a>00512 {<span class="comment">//no need to convert the data</span> |
|
523 <a name="l00513"></a>00513 STATIC_CAST(CMMFClip*,iClip)->WriteBufferL(aBuffer, position, <span class="keyword">this</span>); |
|
524 <a name="l00514"></a>00514 } |
|
525 <a name="l00515"></a>00515 iPos = position; <span class="comment">//save current write position</span> |
|
526 <a name="l00516"></a>00516 } |
|
527 <a name="l00517"></a>00517 |
|
528 <a name="l00518"></a>00518 <span class="comment">// helper function to create buffer of specficed size</span> |
|
529 <a name="l00519"></a>00519 CMMFDataBuffer* CMMFRawFormatWrite::CreateSinkBufferOfSizeL(TUint aSize) |
|
530 <a name="l00520"></a>00520 { |
|
531 <a name="l00521"></a>00521 <span class="comment">//needs to create source buffer</span> |
|
532 <a name="l00522"></a>00522 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(aSize); |
|
533 <a name="l00523"></a>00523 buffer->Data().FillZ(aSize); |
|
534 <a name="l00524"></a>00524 iBufferCreated = ETrue; |
|
535 <a name="l00525"></a>00525 <span class="keywordflow">return</span> buffer; |
|
536 <a name="l00526"></a>00526 } |
|
537 <a name="l00527"></a>00527 |
|
538 <a name="l00528"></a>00528 <span class="comment">// create buffer to receive data</span> |
|
539 <a name="l00529"></a>00529 CMMFBuffer* CMMFRawFormatWrite::CreateSinkBufferL(TMediaId aMediaId, TBool &aReference) |
|
540 <a name="l00530"></a>00530 { |
|
541 <a name="l00531"></a>00531 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) |
|
542 <a name="l00532"></a>00532 { |
|
543 <a name="l00533"></a>00533 <span class="keywordflow">if</span> (!iFrameSize) iFrameSize = KFormatDefaultFrameSize; |
|
544 <a name="l00534"></a>00534 aReference = EFalse; |
|
545 <a name="l00535"></a>00535 <span class="keywordflow">return</span> CreateSinkBufferOfSizeL(iFrameSize); |
|
546 <a name="l00536"></a>00536 } |
|
547 <a name="l00537"></a>00537 <span class="keywordflow">else</span> User::Leave(KErrNotSupported); |
|
548 <a name="l00538"></a>00538 <span class="keywordflow">return</span> NULL; |
|
549 <a name="l00539"></a>00539 } |
|
550 <a name="l00540"></a>00540 |
|
551 <a name="l00541"></a>00541 <span class="comment">// gets the codec type</span> |
|
552 <a name="l00542"></a>00542 TFourCC CMMFRawFormatWrite::SinkDataTypeCode(TMediaId aMediaId) |
|
553 <a name="l00543"></a>00543 { |
|
554 <a name="l00544"></a>00544 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) <span class="keywordflow">return</span> iFourCC; |
|
555 <a name="l00545"></a>00545 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TFourCC(); <span class="comment">//defaults to 'NULL' fourCC</span> |
|
556 <a name="l00546"></a>00546 } |
|
557 <a name="l00547"></a>00547 |
|
558 <a name="l00548"></a>00548 <span class="comment">// sets the codec type</span> |
|
559 <a name="l00549"></a>00549 TInt CMMFRawFormatWrite::SetSinkDataTypeCode(TFourCC aSinkFourCC, TMediaId aMediaId) |
|
560 <a name="l00550"></a>00550 { |
|
561 <a name="l00551"></a>00551 <span class="keywordflow">if</span> (aMediaId.iMediaType != KUidMediaTypeAudio) <span class="keywordflow">return</span> KErrNotSupported; |
|
562 <a name="l00552"></a>00552 <span class="keywordflow">else</span> iFourCC = aSinkFourCC; |
|
563 <a name="l00553"></a>00553 |
|
564 <a name="l00554"></a>00554 <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodePCM16) || |
|
565 <a name="l00555"></a>00555 (iFourCC == KMMFFourCCCodePCM16B) || |
|
566 <a name="l00556"></a>00556 (iFourCC == KMMFFourCCCodePCMU16)) |
|
567 <a name="l00557"></a>00557 iBitsPerSample = 16; |
|
568 <a name="l00558"></a>00558 <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((iFourCC == KMMFFourCCCodeIMAD) || |
|
569 <a name="l00559"></a>00559 (iFourCC == KMMFFourCCCodeIMAS)) |
|
570 <a name="l00560"></a>00560 iBitsPerSample = 4; |
|
571 <a name="l00561"></a>00561 <span class="keywordflow">else</span> |
|
572 <a name="l00562"></a>00562 iBitsPerSample = 8; <span class="comment">//default to 8</span> |
|
573 <a name="l00563"></a>00563 |
|
574 <a name="l00564"></a>00564 <span class="keywordflow">return</span> KErrNone; |
|
575 <a name="l00565"></a>00565 } |
|
576 <a name="l00566"></a>00566 |
|
577 <a name="l00567"></a>00567 <span class="comment">// helper function to read data from clip</span> |
|
578 <a name="l00568"></a>00568 <span class="keywordtype">void</span> CMMFRawFormatWrite::DoReadL(TInt aReadPosition) |
|
579 <a name="l00569"></a>00569 { |
|
580 <a name="l00570"></a>00570 STATIC_CAST(CMMFClip*,iClip)->ReadBufferL(iBuffer,aReadPosition); |
|
581 <a name="l00571"></a>00571 } |
|
582 <a name="l00572"></a>00572 |
|
583 <a name="l00573"></a>00573 <span class="comment">// helper function to write data to clip</span> |
|
584 <a name="l00574"></a>00574 <span class="keywordtype">void</span> CMMFRawFormatWrite::DoWriteL(TInt aWritePosition) |
|
585 <a name="l00575"></a>00575 { |
|
586 <a name="l00576"></a>00576 STATIC_CAST(CMMFClip*,iClip)->WriteBufferL(iBuffer,aWritePosition); |
|
587 <a name="l00577"></a>00577 } |
|
588 <a name="l00578"></a>00578 |
|
589 <a name="l00579"></a>00579 |
|
590 <a name="l00580"></a>00580 <span class="comment">// from MDataSource</span> |
|
591 <a name="l00581"></a>00581 |
|
592 <a name="l00582"></a>00582 <span class="comment">// called by MDataSink to pass back emptied buffer to the source</span> |
|
593 <a name="l00583"></a>00583 <span class="keywordtype">void</span> CMMFRawFormatWrite::BufferEmptiedL(CMMFBuffer* aBuffer) |
|
594 <a name="l00584"></a>00584 { |
|
595 <a name="l00585"></a>00585 iDataSize+=aBuffer->BufferSize(); <span class="comment">//total bytes written</span> |
|
596 <a name="l00586"></a>00586 iPos += aBuffer->BufferSize(); <span class="comment">//total bytes written so far - iPos is not always = iDataSize due to repositions</span> |
|
597 <a name="l00587"></a>00587 <span class="keywordflow">if</span> (iMaxPos < iPos) iMaxPos = iPos; <span class="comment">//need iMaxPos incase we write data then repos to an earlier pos in the clip</span> |
|
598 <a name="l00588"></a>00588 <span class="keywordflow">if</span> (iBufferToEmpty != aBuffer) iDataPath->BufferEmptiedL(iBufferToEmpty); <span class="comment">//need to return same buffer</span> |
|
599 <a name="l00589"></a>00589 <span class="keywordflow">else</span> iDataPath->BufferEmptiedL(aBuffer); |
|
600 <a name="l00590"></a>00590 } |
|
601 <a name="l00591"></a>00591 |
|
602 <a name="l00592"></a>00592 |
|
603 <a name="l00593"></a>00593 <span class="comment">// from CMMFFormatEncode</span> |
|
604 <a name="l00594"></a>00594 |
|
605 <a name="l00595"></a>00595 <span class="comment">// set the number of channels </span> |
|
606 <a name="l00596"></a>00596 TInt CMMFRawFormatWrite::SetNumChannels(TUint aChannels) |
|
607 <a name="l00597"></a>00597 { |
|
608 <a name="l00598"></a>00598 TInt error = KErrNone; |
|
609 <a name="l00599"></a>00599 <span class="keywordflow">if</span> ((aChannels == KMono)||(aChannels == KStereo)) iChannels = aChannels; |
|
610 <a name="l00600"></a>00600 <span class="keywordflow">else</span> error = KErrNotSupported; <span class="comment">//only alow one or two channels</span> |
|
611 <a name="l00601"></a>00601 <span class="keywordflow">return</span> error; |
|
612 <a name="l00602"></a>00602 } |
|
613 <a name="l00603"></a>00603 |
|
614 <a name="l00604"></a>00604 <span class="comment">// set the sample rate</span> |
|
615 <a name="l00605"></a>00605 TInt CMMFRawFormatWrite::SetSampleRate(TUint aSampleRate) |
|
616 <a name="l00606"></a>00606 { |
|
617 <a name="l00607"></a>00607 TInt status = KErrNotSupported; |
|
618 <a name="l00608"></a>00608 <span class="comment">//we'll iterate through the valid sample table</span> |
|
619 <a name="l00609"></a>00609 TInt i = <span class="keyword">sizeof</span>(KRawSampleRates) / <span class="keyword">sizeof</span>(TUint); |
|
620 <a name="l00610"></a>00610 |
|
621 <a name="l00611"></a>00611 <span class="keywordflow">while</span> ((i--) && (status != KErrNone)) |
|
622 <a name="l00612"></a>00612 { |
|
623 <a name="l00613"></a>00613 <span class="keywordflow">if</span> (aSampleRate == KRawSampleRates[i]) |
|
624 <a name="l00614"></a>00614 { |
|
625 <a name="l00615"></a>00615 iSampleRate = aSampleRate; |
|
626 <a name="l00616"></a>00616 status = KErrNone; |
|
627 <a name="l00617"></a>00617 } |
|
628 <a name="l00618"></a>00618 } |
|
629 <a name="l00619"></a>00619 <span class="keywordflow">return</span> status; |
|
630 <a name="l00620"></a>00620 } |
|
631 <a name="l00621"></a>00621 |
|
632 <a name="l00622"></a>00622 <span class="comment">// get the frame interval</span> |
|
633 <a name="l00623"></a>00623 TTimeIntervalMicroSeconds CMMFRawFormatWrite::FrameTimeInterval(TMediaId aMediaId)<span class="keyword"> const</span> |
|
634 <a name="l00624"></a>00624 <span class="keyword"> </span>{ |
|
635 <a name="l00625"></a>00625 <span class="keywordflow">if</span> (aMediaId.iMediaType == KUidMediaTypeAudio) <span class="keywordflow">return</span> iFrameTimeInterval; |
|
636 <a name="l00626"></a>00626 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TTimeIntervalMicroSeconds(0); |
|
637 <a name="l00627"></a>00627 } |
|
638 <a name="l00628"></a>00628 |
|
639 <a name="l00629"></a>00629 <span class="comment">// returns the duration of the source clip</span> |
|
640 <a name="l00630"></a>00630 TTimeIntervalMicroSeconds CMMFRawFormatWrite::Duration(TMediaId aMediaId)<span class="keyword"> const</span> |
|
641 <a name="l00631"></a>00631 <span class="keyword"> </span>{ |
|
642 <a name="l00632"></a>00632 <span class="keywordflow">if</span> ((aMediaId.iMediaType == KUidMediaTypeAudio) |
|
643 <a name="l00633"></a>00633 && (iDataSize) && (iSampleRate) && (iBitsPerSample) && (iChannels)) |
|
644 <a name="l00634"></a>00634 { |
|
645 <a name="l00635"></a>00635 TInt64 clipLength(iDataSize); |
|
646 <a name="l00636"></a>00636 clipLength*=KOneSecondInMicroSeconds; |
|
647 <a name="l00637"></a>00637 TTimeIntervalMicroSeconds duration = TTimeIntervalMicroSeconds(clipLength/iSampleRate); |
|
648 <a name="l00638"></a>00638 duration = |
|
649 <a name="l00639"></a>00639 TTimeIntervalMicroSeconds(duration.Int64()/(iBitsPerSample*iChannels)); |
|
650 <a name="l00640"></a>00640 duration = TTimeIntervalMicroSeconds(duration.Int64()*8); |
|
651 <a name="l00641"></a>00641 <span class="keywordflow">return</span> duration; |
|
652 <a name="l00642"></a>00642 } |
|
653 <a name="l00643"></a>00643 <span class="keywordflow">else</span> <span class="keywordflow">return</span> TTimeIntervalMicroSeconds(0); |
|
654 <a name="l00644"></a>00644 } |
|
655 <a name="l00645"></a>00645 |
|
656 <a name="l00646"></a>00646 <span class="comment">// Calculate and return the number of bytes used for on second of audio.</span> |
|
657 <a name="l00647"></a>00647 TInt64 CMMFRawFormatWrite::BytesPerSecond() |
|
658 <a name="l00648"></a>00648 { |
|
659 <a name="l00649"></a>00649 TInt64 bitsPerSecond = iSampleRate * iBitsPerSample * iChannels ; |
|
660 <a name="l00650"></a>00650 TInt64 bytesPerSecond = bitsPerSecond/8; |
|
661 <a name="l00651"></a>00651 <span class="keywordflow">return</span> bytesPerSecond ; |
|
662 <a name="l00652"></a>00652 } |
|
663 <a name="l00653"></a>00653 |
|
664 <a name="l00654"></a>00654 <span class="comment">// Shortens the clip from the position specified to the end specified.</span> |
|
665 <a name="l00655"></a>00655 <span class="keywordtype">void</span> CMMFRawFormatWrite::CropL(TTimeIntervalMicroSeconds aPosition, TBool aToEnd ) |
|
666 <a name="l00656"></a>00656 { |
|
667 <a name="l00657"></a>00657 <span class="comment">// Does clip have any size to crop</span> |
|
668 <a name="l00658"></a>00658 <span class="keywordflow">if</span> (!(STATIC_CAST(CMMFClip*,iClip)->Size())) User::Leave(KErrNotFound); <span class="comment">//no clip to crop or clip is 0 bytes.</span> |
|
669 <a name="l00659"></a>00659 |
|
670 <a name="l00660"></a>00660 |
|
671 <a name="l00661"></a>00661 <span class="comment">// Is aPosition between the start and the end?</span> |
|
672 <a name="l00662"></a>00662 <span class="keywordflow">if</span> ( ( aPosition < TTimeIntervalMicroSeconds(0) ) || ( aPosition >= Duration( KUidMediaTypeAudio) ) ) |
|
673 <a name="l00663"></a>00663 User::Leave( KErrArgument ) ; |
|
674 <a name="l00664"></a>00664 |
|
675 <a name="l00665"></a>00665 <span class="comment">// Convert aPostion to cropPosition in bytes</span> |
|
676 <a name="l00666"></a>00666 |
|
677 <a name="l00667"></a>00667 TInt64 cropPosition64 = |
|
678 <a name="l00668"></a>00668 TInt64( ( aPosition.Int64() * iSampleRate * (iBitsPerSample/8) * iChannels ) /KOneSecondInMicroSeconds); |
|
679 <a name="l00669"></a>00669 TUint cropPosition = I64INT(cropPosition64); |
|
680 <a name="l00670"></a>00670 |
|
681 <a name="l00671"></a>00671 <span class="comment">// Does cropPosition need adjustment to retain integrity? (assume not)</span> |
|
682 <a name="l00672"></a>00672 |
|
683 <a name="l00673"></a>00673 TUint dataSize ; <span class="comment">// This will be the size of the data left after cropping.</span> |
|
684 <a name="l00674"></a>00674 |
|
685 <a name="l00675"></a>00675 <span class="keywordflow">if</span> ( !aToEnd ) |
|
686 <a name="l00676"></a>00676 { |
|
687 <a name="l00677"></a>00677 <span class="comment">// Shift the data physically</span> |
|
688 <a name="l00678"></a>00678 <span class="comment">// move the data in blocks</span> |
|
689 <a name="l00679"></a>00679 <span class="comment">// Create a CMMFDataBuffer and use CMMFClip to shift the data</span> |
|
690 <a name="l00680"></a>00680 dataSize = iMaxPos - cropPosition ; |
|
691 <a name="l00681"></a>00681 <span class="keywordflow">if</span> (( dataSize > 0 ) && (aPosition != TTimeIntervalMicroSeconds(0))) |
|
692 <a name="l00682"></a>00682 { |
|
693 <a name="l00683"></a>00683 TUint bufSize = ( dataSize < KDefineIOBufferSize ? dataSize : KDefineIOBufferSize ) ; <span class="comment">//max bufSize 512</span> |
|
694 <a name="l00684"></a>00684 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(bufSize) ; |
|
695 <a name="l00685"></a>00685 CleanupStack::PushL( buffer ) ; |
|
696 <a name="l00686"></a>00686 |
|
697 <a name="l00687"></a>00687 TUint rPos = cropPosition ; <span class="comment">// read position</span> |
|
698 <a name="l00688"></a>00688 TUint wPos = 0; |
|
699 <a name="l00689"></a>00689 TInt dataToShift = ETrue ; |
|
700 <a name="l00690"></a>00690 <span class="keywordflow">while</span> ( dataToShift ) |
|
701 <a name="l00691"></a>00691 { |
|
702 <a name="l00692"></a>00692 STATIC_CAST( CMMFClip*, iClip )->ReadBufferL( buffer, rPos ) ; <span class="comment">// synchronous calls</span> |
|
703 <a name="l00693"></a>00693 STATIC_CAST( CMMFClip*, iClip )->WriteBufferL( buffer, wPos ) ; |
|
704 <a name="l00694"></a>00694 <span class="keywordflow">if</span> ( rPos > iMaxPos ) |
|
705 <a name="l00695"></a>00695 dataToShift = EFalse ; <span class="comment">// past the end: Done</span> |
|
706 <a name="l00696"></a>00696 <span class="keywordflow">else</span> |
|
707 <a name="l00697"></a>00697 { <span class="comment">// shift the pointers</span> |
|
708 <a name="l00698"></a>00698 rPos += bufSize ; |
|
709 <a name="l00699"></a>00699 wPos += bufSize ; |
|
710 <a name="l00700"></a>00700 } |
|
711 <a name="l00701"></a>00701 }<span class="comment">// while data to shift</span> |
|
712 <a name="l00702"></a>00702 CleanupStack::PopAndDestroy( ) ; <span class="comment">// buffer</span> |
|
713 <a name="l00703"></a>00703 }<span class="comment">// if data to shift</span> |
|
714 <a name="l00704"></a>00704 }<span class="comment">// crop to start</span> |
|
715 <a name="l00705"></a>00705 <span class="keywordflow">else</span> <span class="comment">// crop to end</span> |
|
716 <a name="l00706"></a>00706 dataSize = cropPosition ; |
|
717 <a name="l00707"></a>00707 |
|
718 <a name="l00708"></a>00708 iDataSize = dataSize ; |
|
719 <a name="l00709"></a>00709 iMaxPos = dataSize ; |
|
720 <a name="l00710"></a>00710 |
|
721 <a name="l00711"></a>00711 <span class="comment">// Do the physical chop</span> |
|
722 <a name="l00712"></a>00712 <span class="keywordflow">if</span> ( iClip->DataSinkType() == KUidMmfFileSink ) |
|
723 <a name="l00713"></a>00713 { |
|
724 <a name="l00714"></a>00714 STATIC_CAST( CMMFFile*, iClip )->FileL().SetSize( iMaxPos ) ; |
|
725 <a name="l00715"></a>00715 iClipLength = iMaxPos; |
|
726 <a name="l00716"></a>00716 } |
|
727 <a name="l00717"></a>00717 } |
|
728 <a name="l00718"></a>00718 |
|
729 <a name="l00719"></a>00719 <span class="comment">// get the supported sample rates</span> |
|
730 <a name="l00720"></a>00720 <span class="keywordtype">void</span> CMMFRawFormatWrite::GetSupportedSampleRatesL(RArray<TUint>& aSampleRates) |
|
731 <a name="l00721"></a>00721 { |
|
732 <a name="l00722"></a>00722 aSampleRates.Reset(); |
|
733 <a name="l00723"></a>00723 |
|
734 <a name="l00724"></a>00724 <span class="comment">// Iterate through the valid sample table and append each value to aSampleRates</span> |
|
735 <a name="l00725"></a>00725 TInt i = <span class="keyword">sizeof</span>(KRawSampleRates) / <span class="keyword">sizeof</span>(TUint); |
|
736 <a name="l00726"></a>00726 |
|
737 <a name="l00727"></a>00727 <span class="keywordflow">while</span> (i--) |
|
738 <a name="l00728"></a>00728 { |
|
739 <a name="l00729"></a>00729 User::LeaveIfError(aSampleRates.Append(KRawSampleRates[i])); |
|
740 <a name="l00730"></a>00730 } |
|
741 <a name="l00731"></a>00731 } |
|
742 <a name="l00732"></a>00732 |
|
743 <a name="l00733"></a>00733 <span class="comment">// get the supported channel number options</span> |
|
744 <a name="l00734"></a>00734 <span class="keywordtype">void</span> CMMFRawFormatWrite::GetSupportedNumChannelsL(RArray<TUint>& aNumChannels) |
|
745 <a name="l00735"></a>00735 { |
|
746 <a name="l00736"></a>00736 aNumChannels.Reset(); |
|
747 <a name="l00737"></a>00737 User::LeaveIfError(aNumChannels.Append(KMono)); |
|
748 <a name="l00738"></a>00738 User::LeaveIfError(aNumChannels.Append(KStereo)); |
|
749 <a name="l00739"></a>00739 } |
|
750 <a name="l00740"></a>00740 |
|
751 <a name="l00741"></a>00741 <span class="comment">// set maximum clip size</span> |
|
752 <a name="l00742"></a>00742 <span class="keywordtype">void</span> CMMFRawFormatWrite::SetMaximumClipSize(TInt aBytes) |
|
753 <a name="l00743"></a>00743 { |
|
754 <a name="l00744"></a>00744 iMaximumClipSize = aBytes; |
|
755 <a name="l00745"></a>00745 } |
|
756 <a name="l00746"></a>00746 |
|
757 <a name="l00747"></a>00747 <span class="comment">// get the supported codecs</span> |
|
758 <a name="l00748"></a>00748 <span class="keywordtype">void</span> CMMFRawFormatWrite::GetSupportedDataTypesL(TMediaId aMediaId, RArray<TFourCC>& aDataTypes) |
|
759 <a name="l00749"></a>00749 { |
|
760 <a name="l00750"></a>00750 <span class="keywordflow">if</span> (aMediaId.iMediaType != KUidMediaTypeAudio) |
|
761 <a name="l00751"></a>00751 User::Leave(KErrNotSupported); |
|
762 <a name="l00752"></a>00752 aDataTypes.Reset(); |
|
763 <a name="l00753"></a>00753 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCM16)); |
|
764 <a name="l00754"></a>00754 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCM16B)); |
|
765 <a name="l00755"></a>00755 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodePCMU16)); |
|
766 <a name="l00756"></a>00756 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodeIMAD)); |
|
767 <a name="l00757"></a>00757 User::LeaveIfError(aDataTypes.Append(KMMFFourCCCodeIMAS)); |
|
768 <a name="l00758"></a>00758 } |
|
769 <a name="l00759"></a>00759 |
|
770 <a name="l00760"></a>00760 |
|
771 <a name="l00761"></a>00761 <span class="comment">// __________________________________________________________________________</span> |
|
772 <a name="l00762"></a>00762 <span class="comment">// Exported proxy for instantiation method resolution</span> |
|
773 <a name="l00763"></a>00763 <span class="comment">// Define the interface UIDs</span> |
|
774 <a name="l00764"></a>00764 |
|
775 <a name="l00765"></a>00765 <span class="keyword">const</span> TImplementationProxy ImplementationTable[] = |
|
776 <a name="l00766"></a>00766 { |
|
777 <a name="l00767"></a>00767 IMPLEMENTATION_PROXY_ENTRY(KRawDecoder, CMMFRawFormatRead::NewL), |
|
778 <a name="l00768"></a>00768 IMPLEMENTATION_PROXY_ENTRY(KRawEncoder, CMMFRawFormatWrite::NewL) |
|
779 <a name="l00769"></a>00769 }; |
|
780 <a name="l00770"></a>00770 |
|
781 <a name="l00771"></a>00771 EXPORT_C <span class="keyword">const</span> TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount) |
|
782 <a name="l00772"></a>00772 { |
|
783 <a name="l00773"></a>00773 aTableCount = <span class="keyword">sizeof</span>(ImplementationTable) / <span class="keyword">sizeof</span>(TImplementationProxy); |
|
784 <a name="l00774"></a>00774 |
|
785 <a name="l00775"></a>00775 <span class="keywordflow">return</span> ImplementationTable; |
|
786 <a name="l00776"></a>00776 } |
|
787 </pre></div></div> |
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788 <hr size="1"/><address style="text-align: right;"><small>Generated by |
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789 <a href="http://www.doxygen.org/index.html"> |
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790 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> |
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791 </body> |
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792 </html> |