Jamoma API  0.6.0.a19
AUInputElement.cpp
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41 #include "AUBase.h"
42 
43 inline bool HasGoodBufferPointers(const AudioBufferList &abl, UInt32 nBytes)
44 {
45  const AudioBuffer *buf = abl.mBuffers;
46  for (UInt32 i = abl.mNumberBuffers; i--;++buf) {
47  if (buf->mData == NULL || buf->mDataByteSize < nBytes)
48  return false;
49  }
50  return true;
51 }
52 
53 
54 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
55 // AUInputElement::AUInputElement
56 //
57 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
58 AUInputElement::AUInputElement(AUBase *audioUnit) :
59  AUIOElement(audioUnit),
60  mInputType(kNoInput)
61 {
62 }
63 
64 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
65 // AUInputElement::SetConnection
66 //
67 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
68 void AUInputElement::SetConnection(const AudioUnitConnection &conn)
69 {
70  if (conn.sourceAudioUnit == 0) {
71  Disconnect();
72  return;
73  }
74 
75  mInputType = kFromConnection;
76  mConnection = conn;
77  mConnRenderProc = NULL;
78  AllocateBuffer();
79 
80 #if !CA_AU_IS_ONLY_PLUGIN
81  UInt32 size = sizeof(AudioUnitRenderProc);
82  OSStatus result = AudioUnitGetProperty( conn.sourceAudioUnit,
83  kAudioUnitProperty_FastDispatch,
84  kAudioUnitScope_Global,
85  kAudioUnitRenderSelect,
86  &mConnRenderProc,
87  &size);
88  if (result == noErr)
89  mConnInstanceStorage = GetComponentInstanceStorage (conn.sourceAudioUnit);
90  else
91  mConnRenderProc = NULL;
92 #else // !TARGET_OS_IPHONE
93  mConnInstanceStorage = NULL;
94  mConnRenderProc = NULL;
95 #endif
96 }
97 
98 void AUInputElement::Disconnect()
99 {
100  mInputType = kNoInput;
101  mIOBuffer.Deallocate();
102 }
103 
104 
105 
106 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
107 // AUInputElement::SetInputCallback
108 //
109 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
110 void AUInputElement::SetInputCallback(AURenderCallback proc, void *refCon)
111 {
112  if (proc == NULL)
113  Disconnect();
114  else {
115  mInputType = kFromCallback;
116  mInputProc = proc;
117  mInputProcRefCon = refCon;
118  AllocateBuffer();
119  }
120 }
121 
122 OSStatus AUInputElement::SetStreamFormat(const CAStreamBasicDescription &fmt)
123 {
124  OSStatus err = AUIOElement::SetStreamFormat(fmt);
125  if (err == AUBase::noErr)
126  AllocateBuffer();
127  return err;
128 }
129 
130 OSStatus AUInputElement::PullInput( AudioUnitRenderActionFlags & ioActionFlags,
131  const AudioTimeStamp & inTimeStamp,
132  AudioUnitElement inElement,
133  UInt32 nFrames)
134 {
135  if (!IsActive())
136  return kAudioUnitErr_NoConnection;
137 
138  AudioBufferList *pullBuffer;
139 
140  if (HasConnection() || !WillAllocateBuffer())
141  pullBuffer = &mIOBuffer.PrepareNullBuffer(mStreamFormat, nFrames);
142  else
143  pullBuffer = &mIOBuffer.PrepareBuffer(mStreamFormat, nFrames);
144 
145  return PullInputWithBufferList (ioActionFlags, inTimeStamp, inElement, nFrames, pullBuffer);
146 }