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fade in and out when opening/closing the noise gate

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This commit is contained in:
Brad Hefta-Gaub 2017-03-08 18:15:32 -08:00
parent 60daaba525
commit 7acfcf6750
1 changed files with 21 additions and 1 deletions
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22
libraries/audio-client/src/AudioNoiseGate.cpp
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@ -142,7 +142,11 @@ void AudioNoiseGate::gateSamples(int16_t* samples, int numSamples) {
_sampleCounter = 0;
}
bool isOpeningGate = false;
if (samplesOverNoiseGate > NOISE_GATE_WIDTH) {
isOpeningGate = !_isOpen;
_isOpen = true;
_framesToClose = NOISE_GATE_CLOSE_FRAME_DELAY;
} else {
@ -154,7 +158,23 @@ void AudioNoiseGate::gateSamples(int16_t* samples, int numSamples) {
}
}
if (!_isOpen) {
memset(samples, 0, numSamples * sizeof(int16_t));
if (_closedInLastFrame) {
// would be nice to do a little crossfade from silence
for (int i = 0; i < numSamples; i++) {
float fadedSample = (1.0f - (float)i / (float)numSamples) * (float)samples[i];
samples[i] = (int16_t)fadedSample;
}
} else {
memset(samples, 0, numSamples * sizeof(int16_t));
}
_lastLoudness = 0;
}
if (isOpeningGate) {
// would be nice to do a little crossfade from silence
for (int i = 0; i < numSamples; i++) {
float fadedSample = ((float)i / (float)numSamples) * (float)samples[i];
samples[i] = (int16_t)fadedSample;
}
}
}