1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/*
File: CAMixMap.h
Abstract: Part of CoreAudio Utility Classes
Version: 1.1
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2014 Apple Inc. All Rights Reserved.
*/
#ifndef __CAMixMap_h__
#define __CAMixMap_h__
// manages the setting of mix map volumes
class CAMixMap {
public:
CAMixMap ()
: mIns(0), mOuts (0), mMixMap(NULL)
{}
CAMixMap (const CAMixMap &mm)
: mIns(0), mOuts (0), mMixMap(NULL)
{ *this = mm; }
CAMixMap (UInt32 numIns, UInt32 numOuts)
: mIns(numIns), mOuts (numOuts), mMixMap(NULL)
{
mMixMap = new Float32[numIns * numOuts];
memset (mMixMap, 0, ByteSize());
}
~CAMixMap () { delete [] mMixMap; }
CAMixMap& operator=(const CAMixMap& mm)
{
if (mMixMap) { delete [] mMixMap; mMixMap = NULL; }
mIns = mm.mIns; mOuts = mm.mOuts;
if (NumIns() && NumOuts()) {
mMixMap = new Float32 [ NumIns() * NumOuts() ];
memcpy (mMixMap, mm.mMixMap, ByteSize());
}
return *this;
}
UInt32 NumIns () const { return mIns; }
UInt32 NumOuts () const { return mOuts; }
void SetCrossPoint (UInt32 inputChan, UInt32 outputChan, Float32 val)
{
if (inputChan < NumIns() && outputChan < NumOuts())
mMixMap[inputChan * NumOuts() + outputChan] = val;
}
Float32 GetCrossPoint (UInt32 inputChan, UInt32 outputChan) const
{
return (inputChan < NumIns() && outputChan < NumOuts())
? mMixMap[inputChan * NumOuts() + outputChan]
: 0;
}
void SetDiagonal (Float32 val)
{
for (UInt32 i = 0; i < NumIns() && i < NumOuts(); ++i) {
mMixMap[i * NumOuts() + i] = val;
}
}
void Clear () { memset (mMixMap, 0, ByteSize()); }
Float32* MM() { return mMixMap; }
const Float32* MM() const { return mMixMap; }
UInt32 ByteSize () const { return NumIns() * NumOuts() * sizeof(Float32); }
UInt32 CountActiveInputs(UInt32 inOutputChannel)
{
UInt32 sum = 0;
for (UInt32 i = 0, k = inOutputChannel; i < mIns; ++i, k+=mOuts) {
if (mMixMap[k] != 0.f) sum++;
}
return sum;
}
void Normalize()
{
// ensure that no output channel will sum over unity.
Float32* mixmap = mMixMap;
Float32 maxsum = 0.f;
for (UInt32 j = 0; j < mOuts; ++j) {
Float32 sum = 0.f;
for (UInt32 i = 0, k = j; i < mIns; ++i, k+=mOuts) {
sum += mixmap[k];
}
if (sum > maxsum) maxsum = sum;
}
if (maxsum == 0.f) return;
Float32 scale = 1.f / maxsum;
for (UInt32 i = 0; i < mIns * mOuts; ++i) {
mixmap[i] *= scale;
}
}
void Print ()
{
printf ("Num Ins: %d, Num Outs: %d\n", (int)mIns, (int)mOuts);
for (unsigned int ins = 0; ins < mIns; ++ins) {
printf ("\t%d: ", ins);
for (unsigned int outs = 0; outs < mOuts; ++outs)
printf ("(%.3f) ", mMixMap[ins * NumOuts() + outs]);
printf("\n");
}
}
private:
UInt32 mIns;
UInt32 mOuts;
Float32 *mMixMap;
};
#endif
|
