private void ResamplePreviewLooped(StreamedAudioClipPreview.ClipPreviewDetails details, float[] resampledPreview)
{
int num = details.preview.Length;
int channels = this.m_Clip.channels;
int previewSamples = details.previewSamples;
double deltaStep = details.deltaStep;
double num2 = details.normalizedStart * (double)previewSamples;
float[] preview = details.preview;
if (deltaStep > 0.5)
{
int num3 = (int)num2;
int num4 = num3;
for (int i = 0; i < details.previewPixelsToRender; i++)
{
for (int j = 0; j < channels; j++)
{
int num5 = num3;
num4 = (int)num2;
int num6 = (2 * num5 * channels + j * 2) % num;
float num7 = preview[num6];
float num8 = preview[num6 + 1];
while (++num5 < num4)
{
num6 = (2 * num5 * channels + j * 2) % num;
num7 = Mathf.Max(num7, preview[num6]);
num8 = Mathf.Min(num8, preview[num6 + 1]);
}
resampledPreview[2 * i * channels + j * 2] = num8;
resampledPreview[2 * i * channels + j * 2 + 1] = num7;
}
num2 += deltaStep;
num3 = num4;
}
}
else
{
for (int k = 0; k < details.previewPixelsToRender; k++)
{
int num9 = (int)(num2 - 1.0);
int num10 = num9 + 1;
float num11 = (float)(num2 - 1.0 - (double)num9);
for (int l = 0; l < channels; l++)
{
int num12 = (2 * num9 * channels + l * 2) % num;
float num13 = preview[num12];
float num14 = preview[num12 + 1];
int num15 = (2 * num10 * channels + l * 2) % num;
float num16 = preview[num15];
float num17 = preview[num15 + 1];
resampledPreview[2 * k * channels + l * 2] = num11 * num17 + (1f - num11) * num14;
resampledPreview[2 * k * channels + l * 2 + 1] = num11 * num16 + (1f - num11) * num13;
}
num2 += deltaStep;
}
}
}
private void ResamplePreviewConfined(StreamedAudioClipPreview.ClipPreviewDetails details, float[] resampledPreview)
{
int channels = this.m_Clip.channels;
int previewSamples = details.previewSamples;
double deltaStep = details.deltaStep;
double num = details.normalizedStart * (double)previewSamples;
float[] preview = details.preview;
if (deltaStep > 0.5)
{
int num2 = (int)num;
int num3 = num2;
for (int i = 0; i < details.previewPixelsToRender; i++)
{
for (int j = 0; j < channels; j++)
{
int num4 = num2;
num3 = (int)num;
float num5 = preview[2 * num4 * channels + j * 2];
float num6 = preview[2 * num4 * channels + j * 2 + 1];
while (++num4 < num3)
{
num5 = Mathf.Max(num5, preview[2 * num4 * channels + j * 2]);
num6 = Mathf.Min(num6, preview[2 * num4 * channels + j * 2 + 1]);
}
resampledPreview[2 * i * channels + j * 2] = num6;
resampledPreview[2 * i * channels + j * 2 + 1] = num5;
}
num += deltaStep;
num2 = num3;
}
}
else
{
for (int k = 0; k < details.previewPixelsToRender; k++)
{
int num7 = (int)(num - 1.0);
int num8 = num7 + 1;
float num9 = (float)(num - 1.0 - (double)num7);
num7 = Mathf.Max(0, num7);
num8 = Mathf.Min(num8, previewSamples - 1);
for (int l = 0; l < channels; l++)
{
float num10 = preview[2 * num7 * channels + l * 2];
float num11 = preview[2 * num7 * channels + l * 2 + 1];
float num12 = preview[2 * num8 * channels + l * 2];
float num13 = preview[2 * num8 * channels + l * 2 + 1];
resampledPreview[2 * k * channels + l * 2] = num9 * num13 + (1f - num9) * num11;
resampledPreview[2 * k * channels + l * 2 + 1] = num9 * num12 + (1f - num9) * num10;
}
num += deltaStep;
}
}
}
protected override void OnModifications(WaveformPreview.MessageFlags cFlags)
{
bool flag = false;
if (WaveformPreview.HasFlag(cFlags, WaveformPreview.MessageFlags.TextureChanged) || WaveformPreview.HasFlag(cFlags, WaveformPreview.MessageFlags.Size) || WaveformPreview.HasFlag(cFlags, WaveformPreview.MessageFlags.Length) || WaveformPreview.HasFlag(cFlags, WaveformPreview.MessageFlags.Looping))
{
this.KillAndClearStreamers();
if (base.length <= 0.0)
{
return;
}
StreamedAudioClipPreview.ClipPreviewDetails details = new StreamedAudioClipPreview.ClipPreviewDetails(this.m_Clip, base.looping, (int)base.Size.x, base.start, base.length);
this.UploadPreview(details);
if (details.IsCandidateForStreaming())
{
flag = true;
}
}
if (!base.optimized)
{
this.KillAndClearStreamers();
flag = false;
}
else if (WaveformPreview.HasFlag(cFlags, WaveformPreview.MessageFlags.Optimization) && !flag)
{
StreamedAudioClipPreview.ClipPreviewDetails clipPreviewDetails = new StreamedAudioClipPreview.ClipPreviewDetails(this.m_Clip, base.looping, (int)base.Size.x, base.start, base.length);
if (clipPreviewDetails.IsCandidateForStreaming())
{
flag = true;
}
}
if (flag)
{
this.m_StreamedSegments = this.CalculateAndStartStreamers(base.start, base.length);
if (this.m_StreamedSegments != null && this.m_StreamedSegments.Length > 0)
{
StreamedAudioClipPreview.Segment[] streamedSegments = this.m_StreamedSegments;
for (int i = 0; i < streamedSegments.Length; i++)
{
StreamedAudioClipPreview.Segment segment = streamedSegments[i];
if (!this.m_Contexts.ContainsKey(segment.streamer))
{
this.m_Contexts.Add(segment.streamer, new StreamedAudioClipPreview.StreamingContext());
}
}
}
}
base.OnModifications(cFlags);
}
private void UploadPreview(StreamedAudioClipPreview.ClipPreviewDetails details)
{
int channels = details.clip.channels;
float[] array = new float[(int)((float)channels * base.Size.x * 2f)];
if (details.localStart + details.localLength > (double)details.clip.length)
{
this.ResamplePreviewLooped(details, array);
}
else
{
this.ResamplePreviewConfined(details, array);
}
this.SetMMWaveData(0, array);
}
