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1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @publishedPartner |
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19 */ |
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20 |
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21 #include <bluetooth/logger.h> |
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22 #include <bluetoothav.h> |
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23 #include "gavdpinterface.h" |
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24 |
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25 #ifdef __FLOG_ACTIVE |
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26 _LIT8(KLogComponent, LOG_COMPONENT_AVLIB); |
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27 #endif |
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28 |
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29 #ifdef _DEBUG |
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30 PANICCATEGORY("medcodec"); |
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31 #endif |
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32 |
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33 TAvdtpMediaCodecCapabilities::TAvdtpMediaCodecCapabilities( |
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34 SymbianBluetoothAV::TBluetoothMediaType aMediaType, |
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35 TBluetoothMediaCodecType aCodecType, |
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36 TInt aLOSC) |
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37 : TAvdtpServiceCapability(EServiceCategoryMediaCodec, aLOSC), |
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38 iMediaType(aMediaType), |
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39 iMediaCodecType(aCodecType) |
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40 { |
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41 } |
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42 |
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43 /** |
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44 Parse AVDTP protocol-domain buffer representing media codec capabilities into this |
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45 @param aPtr the buffer |
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46 @internalTechnology |
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47 */ |
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48 EXPORT_C /*virtual*/ void TAvdtpMediaCodecCapabilities::Parse(const TDesC8& aPtr) |
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49 { |
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50 ASSERT_DEBUG(aPtr.Length()>=2); // the parse broke if this is not true |
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51 iMediaType = static_cast<SymbianBluetoothAV::TBluetoothMediaType>(aPtr[0]>>4); |
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52 iMediaCodecType = static_cast<TBluetoothMediaCodecType>(aPtr[1]); |
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53 } |
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54 |
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55 /** |
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56 Allocate a concrete codec capability from an AVDTP-protocol domain buffer |
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57 */ |
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58 /*static*/ TAvdtpMediaCodecCapabilities* TAvdtpMediaCodecCapabilities::AllocCodecFromPDUL(const TDesC8& aBuf) |
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59 { |
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60 const TInt KMinMediaCodecLOSC = 2; |
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61 |
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62 if (aBuf.Length() < KMinMediaCodecLOSC) |
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63 { |
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64 User::Leave(KErrCorrupt); |
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65 } |
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66 |
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67 using namespace SymbianBluetoothAV; |
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68 |
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69 TAvdtpMediaCodecCapabilities* res = NULL; |
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70 |
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71 static const TInt KMediaTypeOffset = 0; |
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72 TBluetoothMediaType type = static_cast |
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73 <TBluetoothMediaType>(aBuf[KMediaTypeOffset]); |
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74 |
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75 static const TInt KMediaCodecTypeOffset = 1; |
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76 TBluetoothMediaCodecType codec = static_cast |
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77 <TBluetoothMediaCodecType>(aBuf[KMediaCodecTypeOffset]); |
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78 |
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79 switch (codec) |
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80 { |
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81 // at present only support SBC |
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82 // more useful for SymbianOS as nearly always want to mix anyway |
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83 // which means decoding to PCM |
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84 // must then re-encode to something, and that might as well be SBC as mandatory |
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85 case EAudioCodecSBC: |
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86 { |
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87 res = new (ELeave) TSBCCodecCapabilities; |
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88 } |
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89 break; |
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90 |
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91 // to allow other codecs just arrange for a descriptor - clients don't |
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92 // get the parsing done for free |
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93 // later could use ECOM plugins to support other codecs |
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94 // other codecs can be added compile time in the style of the SBC codec |
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95 default: |
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96 { |
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97 res = new (ELeave) TNonSBCCodecCapabilities(type, codec); |
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98 } |
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99 } |
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100 |
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101 return res; |
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102 } |
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103 |
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104 /** |
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105 Returns the media type |
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106 @return media type |
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107 @see SymbianBluetoothAV::TBluetoothMediaType |
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108 */ |
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109 EXPORT_C SymbianBluetoothAV::TBluetoothMediaType TAvdtpMediaCodecCapabilities::MediaType() const |
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110 { |
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111 return iMediaType; |
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112 } |
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113 |
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114 /** |
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115 Returns the media codec type |
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116 @return media codec type |
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117 @see SymbianBluetoothAV::TBluetoothMediaType |
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118 */ |
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119 EXPORT_C TBluetoothMediaCodecType TAvdtpMediaCodecCapabilities::MediaCodecType() const |
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120 { |
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121 return iMediaCodecType; |
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122 } |
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123 |