platform/mac/SuperColliderAU/AUSDK/AUInputElement.cpp

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  40 */
  41 /*=============================================================================
  42         AUInputElement.cpp
  43
  44 =============================================================================*/
  45
  46 #include "AUScopeElement.h"
  47 #include "AUInputElement.h"
  48 #include "AUBase.h"
  49
  50
  51
  52 inline bool     HasGoodBufferPointers(const AudioBufferList &abl, UInt32 nBytes)
  53 {
  54         const AudioBuffer *buf = abl.mBuffers;
  55         for (UInt32 i = abl.mNumberBuffers; i--;++buf) {
  56                 if (buf->mData == NULL || buf->mDataByteSize < nBytes)
  57                         return false;
  58         }
  59         return true;
  60 }
  61
  62
  63 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  64 //      AUInputElement::AUInputElement
  65 //
  66 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  67 AUInputElement::AUInputElement(AUBase *audioUnit) :
  68         AUIOElement(audioUnit),
  69         mInputType(kNoInput)
  70 {
  71 }
  72
  73 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  74 //      AUInputElement::SetConnection
  75 //
  76 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  77 void    AUInputElement::SetConnection(const AudioUnitConnection &conn)
  78 {
  79         if (conn.sourceAudioUnit == 0) {
  80                 Disconnect();
  81                 return;
  82         }
  83
  84         mInputType = kFromConnection;
  85         mConnection = conn;
  86         mConnRenderProc = NULL;
  87         AllocateBuffer();
  88
  89         {
  90                 UInt32 size = sizeof(AudioUnitRenderProc);
  91                 if (AudioUnitGetProperty(       conn.sourceAudioUnit,
  92                                                                 kAudioUnitProperty_FastDispatch,
  93                                                                 kAudioUnitScope_Global,
  94                                                                 kAudioUnitRenderSelect,
  95                                                                 &mConnRenderProc,
  96                                                                 &size) != noErr)
  97                         mConnRenderProc = NULL;
  98         }
  99
 100         mConnInstanceStorage = GetComponentInstanceStorage(conn.sourceAudioUnit);
 101 }
 102
 103 void    AUInputElement::Disconnect()
 104 {
 105         mInputType = kNoInput;
 106         mIOBuffer.Deallocate();
 107 }
 108
 109
 110
 111 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 112 //      AUInputElement::SetInputCallback
 113 //
 114 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 115 void    AUInputElement::SetInputCallback(ProcPtr proc, void *refCon)
 116 {
 117         if (proc == NULL)
 118                 Disconnect();
 119         else {
 120                 mInputType = kFromCallback;
 121                 mInputProc = proc;
 122                 mInputProcRefCon = refCon;
 123                 AllocateBuffer();
 124         }
 125 }
 126
 127 OSStatus        AUInputElement::SetStreamFormat(const CAStreamBasicDescription &fmt)
 128 {
 129         OSStatus err = AUIOElement::SetStreamFormat(fmt);
 130         if (err == noErr)
 131                 AllocateBuffer();
 132         return err;
 133 }
 134
 135 ComponentResult AUInputElement::PullInput(      AudioUnitRenderActionFlags &    ioActionFlags,
 136                                                                                         const AudioTimeStamp &                  inTimeStamp,
 137                                                                                         AudioUnitElement                                inElement,
 138                                                                                         UInt32                                                  nFrames)
 139 {
 140         ComponentResult theResult = noErr;
 141
 142         if (mInputType == kNoInput)
 143                 return kAudioUnitErr_NoConnection;
 144
 145         if (NeedsBufferSpace() && nFrames > mIOBuffer.GetAllocatedFrames())
 146                 mIOBuffer.Allocate (mStreamFormat, nFrames);
 147
 148         AudioBufferList *pullBuffer;
 149
 150         if (mInputType == kFromConnection)
 151                 pullBuffer = &mIOBuffer.PrepareNullBuffer(mStreamFormat, nFrames);
 152         else
 153                 pullBuffer = &mIOBuffer.PrepareBuffer(mStreamFormat, nFrames);
 154
 155         if (mInputType == kFromConnection) {
 156                 {
 157                         if (mConnRenderProc != NULL)
 158                                 theResult = reinterpret_cast<AudioUnitRenderProc>(mConnRenderProc)(
 159                                                 mConnInstanceStorage, &ioActionFlags, &inTimeStamp, mConnection.sourceOutputNumber,
 160                                                 nFrames, pullBuffer);
 161                         else
 162                                 theResult = AudioUnitRender(
 163                                                 mConnection.sourceAudioUnit, &ioActionFlags, &inTimeStamp, mConnection.sourceOutputNumber,
 164                                                 nFrames, pullBuffer);
 165                 }
 166         } else {
 167                 // kFromCallback:
 168                 {
 169                         theResult = reinterpret_cast<AURenderCallback>(mInputProc)(
 170                                                 mInputProcRefCon, &ioActionFlags, &inTimeStamp, inElement,
 171                                                 nFrames, pullBuffer);
 172                 }
 173         }
 174
 175         if (mInputType == kNoInput)     // defense: the guy upstream could have disconnected
 176                                                                 // it's a horrible thing to do, but may happen!
 177                 return kAudioUnitErr_NoConnection;
 178
 179 //      if (theResult == noErr && GetChannelData(0)[0] != 0.)
 180 //              AUBufferList::PrintBuffer("PullInput", 0, *pullBuffer);
 181
 182         return theResult;
 183 }