public void Update(byte [] pcm)
{
for (int ch = 0; ch < mCh; ++ch)
{
mPeakCalcArray[ch].UpdateBegin();
}
int sampleBytes = WasapiCS.SampleFormatTypeToUseBitsPerSample(mSampleFormat) / 8;
int nFrames = pcm.Length / (mCh * sampleBytes);
int pos = 0;
for (int n = 0; n < nFrames; ++n)
{
for (int ch = 0; ch < mCh; ++ch)
{
double v = GetSampleValue(pcm, pos);
mPeakCalcArray[ch].NextSample(v);
pos += sampleBytes;
}
}
for (int ch = 0; ch < mCh; ++ch)
{
mPeakCalcArray[ch].UpdateEnd();
if (0 < mPeakHoldSec)
{
// 最後のピーク値 x 時間減衰。
double lastPeakDb = mLastPeakLevelDb[ch] - ReleaseTimeDbPerSec * mSw.ElapsedMilliseconds / 1000.0;
if (mPeakCalcArray[ch].PeakDb < lastPeakDb)
{
mPeakCalcArray[ch].UpdatePeakDbTo(lastPeakDb);
}
mLastPeakLevelDb[ch] = mPeakCalcArray[ch].PeakDb;
}
}
mSw.Restart();
}
