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Changed the M/S processing to use the pan/width helpers

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This commit is contained in:
Paul Fd 2020-02-09 23:39:33 +01:00
parent 9783e393da
commit 06de588308
1 changed files with 17 additions and 22 deletions
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39
src/sfizz/Voice.cpp
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@ -327,33 +327,28 @@ void sfz::Voice::processStereo(AudioSpan<float> buffer) noexcept
copy<float>(rightBuffer, span1); copy<float>(rightBuffer, span1);
add<float>(leftBuffer, rightBuffer); add<float>(leftBuffer, rightBuffer);
subtract<float>(span1, leftBuffer); subtract<float>(span1, leftBuffer);
applyGain<float>(sqrtTwoInv<float>, leftBuffer);
applyGain<float>(sqrtTwoInv<float>, rightBuffer); // Add const aliases to be slightly more readable
const auto midBuffer = leftBuffer;
const auto sideBuffer = rightBuffer;
applyGain<float>(sqrtTwoInv<float>, midBuffer);
applyGain<float>(sqrtTwoInv<float>, sideBuffer);
// Apply the width process // Apply the width process
widthEnvelope.getBlock(span1); widthEnvelope.getBlock(span1);
fill<float>(span2, 1.0f); width<float>(span1, midBuffer, sideBuffer);
add<float>(span1, span2);
applyGain<float>(piFour<float>, span2);
cos<float>(span2, span1);
sin<float>(span2, span2);
applyGain<float>(span1, leftBuffer);
applyGain<float>(span2, rightBuffer);
// Apply a position to the "left" channel which is supposed to be our mid channel // Copy the mid channel into another span
// TODO: add panning here too? const auto midBufferRight = span2;
copy<float>(midBuffer, midBufferRight);
positionEnvelope.getBlock(span1); positionEnvelope.getBlock(span1);
fill<float>(span2, 1.0f); pan<float>(span1, midBuffer, midBufferRight);
add<float>(span1, span2);
applyGain<float>(piFour<float>, span2); // Rebuild left/right
cos<float>(span2, span1); add<float>(sideBuffer, midBuffer);
sin<float>(span2, span2); applyGain(sqrtTwoInv<float>, leftBuffer);
copy<float>(leftBuffer, span3); add<float>(midBufferRight, sideBuffer);
copy<float>(rightBuffer, leftBuffer); applyGain(sqrtTwoInv<float>, rightBuffer);
multiplyAdd<float>(span1, span3, leftBuffer);
multiplyAdd<float>(span2, span3, rightBuffer);
applyGain<float>(sqrtTwoInv<float>, leftBuffer);
applyGain<float>(sqrtTwoInv<float>, rightBuffer);
} }
void sfz::Voice::fillWithData(AudioSpan<float> buffer) noexcept void sfz::Voice::fillWithData(AudioSpan<float> buffer) noexcept