1 // NullAudioOp.cpp 2 3 #include "NullAudioOp.h" 4 #include "IAudioOp.h" 5 #include "IParameterSet.h" 6 7 #include <Debug.h> 8 #include <ParameterWeb.h> 9 10 // -------------------------------------------------------- // 11 // _NullAudioOp 12 // -------------------------------------------------------- // 13 14 class _NullAudioOp : 15 public IAudioOp { 16 public: 17 _NullAudioOp( 18 IAudioOpHost* _host) : 19 IAudioOp(_host) {} 20 21 uint32 process( 22 const AudioBuffer& source, 23 AudioBuffer& destination, 24 double& sourceOffset, 25 uint32& destinationOffset, 26 uint32 framesRequired, 27 bigtime_t performanceTime) { 28 29 return framesRequired; 30 } 31 32 void replace( 33 IAudioOp* oldOp) { 34 delete oldOp; 35 } 36 }; 37 38 // -------------------------------------------------------- // 39 // _NullParameterSet 40 // -------------------------------------------------------- // 41 42 class _NullParameterSet : 43 public IParameterSet { 44 public: 45 status_t store( 46 int32 parameterID, 47 void* data, 48 size_t size) { return B_ERROR; } 49 50 status_t retrieve( 51 int32 parameterID, 52 void* data, 53 size_t* ioSize) { return B_ERROR; } 54 55 // implement this hook to return a BParameterGroup representing 56 // the parameters represented by this set 57 58 void populateGroup( 59 BParameterGroup* group) { 60 // 61 // group->MakeNullParameter( 62 // 0, 63 // B_MEDIA_NO_TYPE, 64 // "NullFilter has no parameters", 65 // B_GENERIC); 66 } 67 }; 68 69 // -------------------------------------------------------- // 70 // NullAudioOpFactory impl. 71 // -------------------------------------------------------- // 72 73 IAudioOp* NullAudioOpFactory::createOp( 74 IAudioOpHost* host, 75 const media_raw_audio_format& inputFormat, 76 const media_raw_audio_format& outputFormat) { 77 78 return new _NullAudioOp(host); 79 } 80 81 IParameterSet* NullAudioOpFactory::createParameterSet() { 82 return new _NullParameterSet(); 83 } 84 85 86 // END -- NullAudioOp.cpp --