void DrawMinMax(Rect waveArea, WaveDisplayState displayState)
{
UnityEditor.Handles.color = new Color(1f, 104f / 255f, 0f, KoreographerColors.HandleFullAlpha);
int amplitude = (int)(channelAmplitudePercent * (waveArea.height / 2f));
Vector2 startPoint = Vector2.zero;
Vector2 endPoint = Vector2.zero;
float minSample, maxSample, curSample;
int sampleIdxForPixel;
int cacheIdxOffset = displayState.firstSamplePackToDraw / displayState.samplesPerPixel;
for (int i = 0; i < waveArea.width && displayState.firstSamplePackToDraw + (i * displayState.samplesPerPixel) < sampleData.Length; ++i)
{
WaveformCacheEntry entry;
if (cachedData[cacheIdxOffset + i] == null)
{
entry = new WaveformCacheEntry();
cachedData[cacheIdxOffset + i] = entry;
}
else
{
entry = cachedData[cacheIdxOffset + i];
}
if (!entry.minMaxValid)
{
minSample = 1f;
maxSample = -1f;
sampleIdxForPixel = i * displayState.samplesPerPixel;
for (int j = 0; j < displayState.samplesPerPixel && displayState.firstSamplePackToDraw + sampleIdxForPixel + j < sampleData.Length; j++)
{
curSample = sampleData[displayState.firstSamplePackToDraw + sampleIdxForPixel + j];
minSample = Mathf.Min(minSample, curSample);
maxSample = Mathf.Max(maxSample, curSample);
}
// Subtract because positive is down!
entry.minMaxValues.x = waveArea.center.y - (maxSample * amplitude);
entry.minMaxValues.y = waveArea.center.y - (minSample * amplitude);
// Update the cache entry!
entry.minMaxValid = true;
}
// Draw a vertical line.
startPoint.x = waveArea.x + i;
endPoint.x = startPoint.x;
startPoint.y = entry.minMaxValues.x;
endPoint.y = entry.minMaxValues.y;
UnityEditor.Handles.DrawLine(startPoint, endPoint);
}
}
void DrawRMS(Rect waveArea, WaveDisplayState displayState)
{
UnityEditor.Handles.color = new Color(1f, 0.58431f, 0f, KoreographerColors.HandleFullAlpha);
int amplitude = (int)(channelAmplitudePercent * (waveArea.height / 2f));
Vector2 startPoint = Vector2.zero;
Vector2 endPoint = Vector2.zero;
float curSample, peak;
int sampleIdxForPixel;
int cacheIdxOffset = displayState.firstSamplePackToDraw / displayState.samplesPerPixel;
// Calculate the waveform via RMS!
for (int i = 0; i < waveArea.width && displayState.firstSamplePackToDraw + (i * displayState.samplesPerPixel) < sampleData.Length; ++i)
{
WaveformCacheEntry entry;
if (cachedData[cacheIdxOffset + i] == null)
{
entry = new WaveformCacheEntry();
cachedData[cacheIdxOffset + i] = entry;
}
else
{
entry = cachedData[cacheIdxOffset + i];
}
if (!entry.rmsValid)
{
peak = 0;
sampleIdxForPixel = i * displayState.samplesPerPixel;
for (int j = 0; j < displayState.samplesPerPixel && displayState.firstSamplePackToDraw + sampleIdxForPixel + j < sampleData.Length; j++)
{
curSample = sampleData[displayState.firstSamplePackToDraw + sampleIdxForPixel + j];
peak += (curSample * curSample);
}
peak = Mathf.Sqrt(peak / (float)displayState.samplesPerPixel);
entry.rmsValues.x = waveArea.center.y - (peak * amplitude);
entry.rmsValues.y = waveArea.center.y + (peak * amplitude);
// Update the cache entry!
entry.rmsValid = true;
}
// Draw vertical lines.
startPoint.x = waveArea.x + i;
endPoint.x = startPoint.x;
startPoint.y = entry.rmsValues.x;
endPoint.y = entry.rmsValues.y;
UnityEditor.Handles.DrawLine(startPoint, endPoint);
}
}