void SamplesBuffer::set(const SamplesBuffer &buffer, int bufferChannelOffset, int channelsToCopy)
{
if (buffer.channels <= 0 || channels <= 0)
return;
int framesToCopy = std::min(buffer.getFrameLenght(), (int)frameLenght);
int channelsToProcess = std::min(channelsToCopy, std::min(buffer.getChannels(), (int)channels));
if (channelsToProcess + bufferChannelOffset <= buffer.getChannels()) {// avoid invalid channel index
int bytesToCopy = framesToCopy * sizeof(float);
for (int c = 0; c < channelsToProcess; ++c)
memcpy((void *)getSamplesArray(c), buffer.getSamplesArray(
c + bufferChannelOffset), bytesToCopy);
}
}
void SamplesBuffer::set(const SamplesBuffer &buffer, int bufferChannelOffset, int channelsToCopy)
{
if (buffer.channels == 0 || channels == 0)
return;
int framesToCopy = std::min(buffer.getFrameLenght(), frameLenght);
int channelsToProcess = std::min(channelsToCopy, std::min(buffer.getChannels(), static_cast<int>(channels)));
if (channelsToProcess + bufferChannelOffset > buffer.getChannels())
return; // avoid crash acessing invalid memory
int bytesToCopy = framesToCopy * sizeof(float);
for (int c = 0; c < channelsToProcess; ++c) {
memcpy((void *)getSamplesArray(c), buffer.getSamplesArray(c + bufferChannelOffset), bytesToCopy);
}
}
void LooperLayer::mixTo(SamplesBuffer &outBuffer, uint samplesToMix, uint intervalPosition, float looperMainGain)
{
bool canMix = samplesToMix > 0 && (muteState == LooperLayer::Unmuted || muteState == LooperLayer::WaitingToMute);
if (canMix) {
float *internalChannels[] = {&(leftChannel[0]), &(rightChannel[0])};
const uint secondChannelIndex = (outBuffer.isMono()) ? 0 : 1;
float *bufferChannels[] = {outBuffer.getSamplesArray(0), outBuffer.getSamplesArray(secondChannelIndex)};
uint channels = outBuffer.getChannels();
const float mainGain = looperMainGain * gain;
const float finalLeftGain = mainGain * leftGain;
const float finalRightGain = mainGain * rightGain;
float gains[] = {finalLeftGain, finalRightGain};
for (uint c = 0; c < channels; ++c) {
for (uint s = 0; s < samplesToMix; ++s) {
const uint offset = s + intervalPosition;
bufferChannels[c][s] += internalChannels[c][offset] * gains[c];
}
}
}
}