diff options
Diffstat (limited to 'plugins/MacAU/EdIsDim/EdIsDim.cpp')
| -rwxr-xr-x | plugins/MacAU/EdIsDim/EdIsDim.cpp | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/plugins/MacAU/EdIsDim/EdIsDim.cpp b/plugins/MacAU/EdIsDim/EdIsDim.cpp index 164f8df..e9d2e23 100755 --- a/plugins/MacAU/EdIsDim/EdIsDim.cpp +++ b/plugins/MacAU/EdIsDim/EdIsDim.cpp @@ -171,11 +171,8 @@ ComponentResult EdIsDim::Initialize() // this is called the reset the DSP state (clear buffers, reset counters, etc.) ComponentResult EdIsDim::Reset(AudioUnitScope inScope, AudioUnitElement inElement) { - fpNShapeLA = 0.0; - fpNShapeLB = 0.0; - fpNShapeRA = 0.0; - fpNShapeRB = 0.0; - fpFlip = true; + fpNShapeL = 0.0; + fpNShapeR = 0.0; return noErr; } @@ -194,10 +191,6 @@ OSStatus EdIsDim::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags Float32 * outputL = (Float32*)(outBuffer.mBuffers[0].mData); Float32 * outputR = (Float32*)(outBuffer.mBuffers[1].mData); UInt32 nSampleFrames = inFramesToProcess; - - Float32 fpTemp; - long double fpOld = 0.618033988749894848204586; //golden ratio! - long double fpNew = 1.0 - fpOld; long double inputSampleL; long double inputSampleR; @@ -256,25 +249,14 @@ OSStatus EdIsDim::ProcessBufferLists(AudioUnitRenderActionFlags & ioActionFlags mid = (inputSampleL+inputSampleR)/2.0; side = (inputSampleL-inputSampleR)/2.0; - //noise shaping to 32-bit floating point - if (fpFlip) { - fpTemp = mid; - fpNShapeLA = (fpNShapeLA*fpOld)+((mid-fpTemp)*fpNew); - mid += fpNShapeLA; - fpTemp = side; - fpNShapeRA = (fpNShapeRA*fpOld)+((side-fpTemp)*fpNew); - side += fpNShapeRA; - } - else { - fpTemp = mid; - fpNShapeLB = (fpNShapeLB*fpOld)+((mid-fpTemp)*fpNew); - mid += fpNShapeLB; - fpTemp = side; - fpNShapeRB = (fpNShapeRB*fpOld)+((side-fpTemp)*fpNew); - side += fpNShapeRB; - } - fpFlip = !fpFlip; - //end noise shaping on 32 bit output + //stereo 32 bit dither, made small and tidy. + int expon; frexpf((Float32)mid, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + mid += (dither-fpNShapeL); fpNShapeL = dither; + frexpf((Float32)side, &expon); + dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62); + side += (dither-fpNShapeR); fpNShapeR = dither; + //end 32 bit dither *outputL = mid; *outputR = side; |