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1 /* |
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2 * Copyright (c) 2002-2006 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Implementation of RingToneRecognizer |
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15 * |
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16 */ |
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17 |
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18 |
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19 // INCLUDE FILES |
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20 #include <apmrec.h> |
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21 #include <apmstd.h> |
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22 #include <implementationproxy.h> |
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23 |
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24 #include "recrt.h" |
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25 |
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26 // CONSTANTS |
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27 const TUid KUidRingingToneRecognizer={0x100059EA}; |
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28 const TInt KMinBufferLength=3; // minimum amount of file needed to determine a ringing tone IF it's not called .rng |
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29 const TInt KMaxBufferLength=4; // maximum amount of buffer space we will ever use |
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30 const TInt KRecRtCommandByte=2; // 00000010 = <command length> |
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31 const TInt KRecRtUnicodeCommandByte=3; // 00000011 = <command length> if unicode |
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32 const TInt KRecRtProgrammingByte=74; // 01001010 = <ringing-tone programming> + 0 |
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33 const TInt KRecRtSoundByte=58; // 00111010 = <sound> + 0 |
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34 const TInt KRecRtUnicodeByte=68; // 01000100 = <unicode> + 0 |
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35 const TInt KRecRtFileExtensionsMightBeValid=4; // If the file name length > 4, the file extension might be valid |
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36 |
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37 _LIT(KRingToneExtension1, ".rng"); |
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38 _LIT(KRingToneExtension2, ".nrt"); |
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39 _LIT(KRingToneExtension3, ".ota"); |
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40 _LIT8(KDataTypeRingingTone,"application/vnd.nokia.ringing-tone"); |
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41 |
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42 |
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43 |
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44 CApaRingingToneRecognizer::CApaRingingToneRecognizer() |
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45 : CApaDataRecognizerType(KUidRingingToneRecognizer, CApaDataRecognizerType::ENormal) |
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46 { |
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47 iCountDataTypes=1; |
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48 } |
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49 |
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50 CApaRingingToneRecognizer::~CApaRingingToneRecognizer() |
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51 { |
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52 // Do nothing |
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53 } |
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54 |
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55 TUint CApaRingingToneRecognizer::PreferredBufSize() |
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56 { |
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57 return KMaxBufferLength; |
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58 } |
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59 |
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60 TDataType CApaRingingToneRecognizer::SupportedDataTypeL(TInt /*aIndex*/) const |
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61 { |
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62 // __ASSERT_DEBUG(aIndex==0,User::Invariant()); |
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63 return TDataType(KDataTypeRingingTone); |
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64 } |
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65 |
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66 void CApaRingingToneRecognizer::DoRecognizeL(const TDesC& aName, const TDesC8& aBuffer) |
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67 { |
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68 TBool nameRecognized=EFalse; |
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69 if (aName.Length()>KRecRtFileExtensionsMightBeValid) |
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70 { |
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71 if ((aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension1)==0) || |
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72 (aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension2)==0) || |
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73 (aName.Right(KRecRtFileExtensionsMightBeValid).CompareF(KRingToneExtension3)==0)) |
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74 nameRecognized=ETrue; |
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75 } |
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76 |
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77 TInt length=aBuffer.Length(); |
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78 if (length<KMinBufferLength) |
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79 return; // too short to be a ring tone |
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80 TBool validChars=EFalse; |
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81 |
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82 if(aBuffer[0] == KRecRtCommandByte ) //if it's a ring tone, it's not in unicode format |
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83 { |
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84 if (aBuffer[1] == KRecRtProgrammingByte && aBuffer[2] == KRecRtSoundByte) |
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85 validChars = ETrue; |
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86 } |
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87 else if (aBuffer[0] == KRecRtUnicodeCommandByte) // if it's a ring tone, it is in unicode format |
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88 { |
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89 if (aBuffer[1] == KRecRtProgrammingByte && aBuffer[2] == KRecRtUnicodeByte && aBuffer[3] == KRecRtSoundByte) |
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90 validChars = ETrue; |
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91 } |
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92 else if(aBuffer[0] == 0x00 && aBuffer[1] == 0x11 && aBuffer[2] == 0x06) |
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93 { |
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94 validChars = ETrue; |
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95 } |
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96 |
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97 if (!validChars) |
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98 return; // not a ringing tone |
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99 else |
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100 { |
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101 if (!nameRecognized) |
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102 iConfidence=EProbable; // is probably a ringing tone |
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103 else |
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104 iConfidence=ECertain; // is certainly a ringing tone |
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105 iDataType=TDataType(KDataTypeRingingTone); |
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106 } |
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107 } |
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108 |
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109 |
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110 |
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111 CApaDataRecognizerType* CApaRingingToneRecognizer::CreateRecognizerL() |
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112 { |
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113 return new (ELeave) CApaRingingToneRecognizer(); |
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114 } |
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115 |
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116 const TImplementationProxy ImplementationTable[] = |
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117 { |
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118 IMPLEMENTATION_PROXY_ENTRY(KRingingToneRecognizerImplementationUid, CApaRingingToneRecognizer::CreateRecognizerL) |
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119 }; |
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120 |
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121 EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount) |
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122 { |
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123 aTableCount = sizeof(ImplementationTable) / sizeof(TImplementationProxy); |
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124 return ImplementationTable; |
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125 } |
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126 |
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127 |
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128 // End of file |