3 Abstract: Part of CoreAudio Utility Classes
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47 #ifndef __CAMixMap_h__
48 #define __CAMixMap_h__
50 // manages the setting of mix map volumes
55 : mIns(0), mOuts (0), mMixMap(NULL)
58 CAMixMap (const CAMixMap &mm)
59 : mIns(0), mOuts (0), mMixMap(NULL)
62 CAMixMap (UInt32 numIns, UInt32 numOuts)
63 : mIns(numIns), mOuts (numOuts), mMixMap(NULL)
65 mMixMap = new Float32[numIns * numOuts];
66 memset (mMixMap, 0, ByteSize());
69 ~CAMixMap () { delete [] mMixMap; }
71 CAMixMap& operator=(const CAMixMap& mm)
73 if (mMixMap) { delete [] mMixMap; mMixMap = NULL; }
74 mIns = mm.mIns; mOuts = mm.mOuts;
75 if (NumIns() && NumOuts()) {
76 mMixMap = new Float32 [ NumIns() * NumOuts() ];
77 memcpy (mMixMap, mm.mMixMap, ByteSize());
82 UInt32 NumIns () const { return mIns; }
83 UInt32 NumOuts () const { return mOuts; }
85 void SetCrossPoint (UInt32 inputChan, UInt32 outputChan, Float32 val)
87 if (inputChan < NumIns() && outputChan < NumOuts())
88 mMixMap[inputChan * NumOuts() + outputChan] = val;
90 Float32 GetCrossPoint (UInt32 inputChan, UInt32 outputChan) const
92 return (inputChan < NumIns() && outputChan < NumOuts())
93 ? mMixMap[inputChan * NumOuts() + outputChan]
97 void SetDiagonal (Float32 val)
99 for (UInt32 i = 0; i < NumIns() && i < NumOuts(); ++i) {
100 mMixMap[i * NumOuts() + i] = val;
104 void Clear () { memset (mMixMap, 0, ByteSize()); }
107 Float32* MM() { return mMixMap; }
108 const Float32* MM() const { return mMixMap; }
109 UInt32 ByteSize () const { return NumIns() * NumOuts() * sizeof(Float32); }
111 UInt32 CountActiveInputs(UInt32 inOutputChannel)
114 for (UInt32 i = 0, k = inOutputChannel; i < mIns; ++i, k+=mOuts) {
115 if (mMixMap[k] != 0.f) sum++;
122 // ensure that no output channel will sum over unity.
123 Float32* mixmap = mMixMap;
124 Float32 maxsum = 0.f;
125 for (UInt32 j = 0; j < mOuts; ++j) {
127 for (UInt32 i = 0, k = j; i < mIns; ++i, k+=mOuts) {
130 if (sum > maxsum) maxsum = sum;
133 if (maxsum == 0.f) return;
134 Float32 scale = 1.f / maxsum;
135 for (UInt32 i = 0; i < mIns * mOuts; ++i) {
142 printf ("Num Ins: %d, Num Outs: %d\n", (int)mIns, (int)mOuts);
143 for (unsigned int ins = 0; ins < mIns; ++ins) {
144 printf ("\t%d: ", ins);
145 for (unsigned int outs = 0; outs < mOuts; ++outs)
146 printf ("(%.3f) ", mMixMap[ins * NumOuts() + outs]);