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Diffstat (limited to 'libs/appleutility/CoreAudio/PublicUtility/CAMixMap.h')
| -rw-r--r-- | libs/appleutility/CoreAudio/PublicUtility/CAMixMap.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/libs/appleutility/CoreAudio/PublicUtility/CAMixMap.h b/libs/appleutility/CoreAudio/PublicUtility/CAMixMap.h new file mode 100644 index 0000000000..62e95d4aa5 --- /dev/null +++ b/libs/appleutility/CoreAudio/PublicUtility/CAMixMap.h @@ -0,0 +1,157 @@ +/* + 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 |