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Updated the stereo demo

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This commit is contained in:
Paul Fd 2020-02-10 21:58:08 +01:00
parent 186c4f6b53
commit 3a0ae68111
1 changed files with 2 additions and 36 deletions
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38
tests/DemoStereo.cpp
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@ -160,42 +160,8 @@ int DemoApp::processAudio(jack_nframes_t nframes, void *cbdata)
std::fill(positionEnvelope.begin(), positionEnvelope.end(), self->fPan * 0.01f);
using namespace sfz;
/* TODO(jpc) have this code in common instead of copy-paste */
// Create mid/side from left/right in the output buffer
// Add const aliases to be slightly more readable
const auto leftBufferCopy = tempSpan1;
copy<float>(leftBuffer, leftBufferCopy);
const auto midBuffer = leftBuffer;
add<float>(rightBuffer, midBuffer);
const auto sideBuffer = rightBuffer;
applyGain<float>(-1.0f, sideBuffer);
add<float>(leftBufferCopy, sideBuffer);
applyGain<float>(sqrtTwoInv<float>, midBuffer);
applyGain<float>(sqrtTwoInv<float>, sideBuffer);
// Apply the width process
width<float>(widthEnvelope, midBuffer, sideBuffer);
// Copy the mid channel into another span
const auto midBufferCopy = tempSpan1;
copy<float>(midBuffer, midBufferCopy);
pan<float>(positionEnvelope, midBuffer, midBufferCopy);
// Rebuild left/right
// Recall that midBuffer and leftBuffer point to the same buffer
add<float>(sideBuffer, leftBuffer);
applyGain(sqrtTwoInv<float>, leftBuffer);
// Recall that sideBuffer and rightBuffer point to the same buffer
applyGain<float>(-1.0f, sideBuffer);
add<float>(midBufferCopy, sideBuffer);
applyGain(sqrtTwoInv<float>, rightBuffer);
width<float>(widthEnvelope, leftBuffer, rightBuffer);
pan<float>(positionEnvelope, leftBuffer, rightBuffer);
return 0;
}