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Refactor Every namespace Keyword Usage

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copecone committed 2026-08-19 15:40:00 +09:00
1 parent 4e67cb9b09
commit 27be2141f7
44 files changed
+4619 -4545
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Util/Audio/AudioResampler.cs
+80 -81
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@@ -1,101 +1,100 @@
using System;
namespace ADOFAIRenderer.Util.Audio
namespace ADOFAIRenderer.Util.Audio;
internal static class AudioResampler
{
internal static class AudioResampler
public static float[] Resample(float[] inputSamples, int inputChannels, int inputFrequency, int targetChannels, int targetFrequency)
{
public static float[] Resample(float[] inputSamples, int inputChannels, int inputFrequency, int targetChannels, int targetFrequency)
// ── Safety Validation ──
if (inputSamples.Length == 0 ||
inputChannels <= 0 || targetChannels <= 0 ||
inputFrequency <= 0 || targetFrequency <= 0)
{
// ── Safety Validation ──
if (inputSamples.Length == 0 ||
inputChannels <= 0 || targetChannels <= 0 ||
inputFrequency <= 0 || targetFrequency <= 0)
return Array.Empty<float>();
}
// If format is identical, return original samples
if (inputFrequency == targetFrequency && inputChannels == targetChannels)
return inputSamples;
int inputLength = inputSamples.Length / inputChannels;
int targetLength = (int)Math.Floor((double)inputLength * targetFrequency / inputFrequency);
float[] outputSamples = new float[targetLength * targetChannels];
for (int i = 0; i < targetLength; i++)
{
double srcIndex = (double)i * inputFrequency / targetFrequency;
long idxLow = (long)Math.Floor(srcIndex);
long idxHigh = idxLow + 1;
float t = (float)(srcIndex - idxLow);
if (idxHigh >= inputLength) idxHigh = inputLength - 1;
if (idxLow >= inputLength) idxLow = inputLength - 1;
if (targetChannels == 1) // 1. Mono Output
{
return Array.Empty<float>();
float valLow, valHigh;
if (inputChannels == 1) // Mono -> Mono
{
valLow = inputSamples[idxLow];
valHigh = inputSamples[idxHigh];
}
else // Multi -> Mono (Downmix: Average all channels)
{
float sumLow = 0f;
float sumHigh = 0f;
for (int c = 0; c < inputChannels; c++)
{
sumLow += inputSamples[idxLow * inputChannels + c];
sumHigh += inputSamples[idxHigh * inputChannels + c];
}
valLow = sumLow / inputChannels;
valHigh = sumHigh / inputChannels;
}
outputSamples[i] = valLow + t * (valHigh - valLow);
}
// If format is identical, return original samples
if (inputFrequency == targetFrequency && inputChannels == targetChannels)
return inputSamples;
int inputLength = inputSamples.Length / inputChannels;
int targetLength = (int)Math.Floor((double)inputLength * targetFrequency / inputFrequency);
float[] outputSamples = new float[targetLength * targetChannels];
for (int i = 0; i < targetLength; i++)
else if (targetChannels == 2) // 2. Stereo Output
{
double srcIndex = (double)i * inputFrequency / targetFrequency;
long idxLow = (long)Math.Floor(srcIndex);
long idxHigh = idxLow + 1;
float t = (float)(srcIndex - idxLow);
if (inputChannels == 1) // Mono -> Stereo (Duplicate to Left/Right)
{
float valLow = inputSamples[idxLow];
float valHigh = inputSamples[idxHigh];
float val = valLow + t * (valHigh - valLow);
outputSamples[i * 2] = val;
outputSamples[i * 2 + 1] = val;
}
else // Stereo/Multi -> Stereo (Map Left/Right, ignore extra channels)
{
float valLowL = inputSamples[idxLow * inputChannels];
float valHighL = inputSamples[idxHigh * inputChannels];
outputSamples[i * 2] = valLowL + t * (valHighL - valLowL);
if (idxHigh >= inputLength) idxHigh = inputLength - 1;
if (idxLow >= inputLength) idxLow = inputLength - 1;
if (targetChannels == 1) // 1. Mono Output
float valLowR = inputSamples[idxLow * inputChannels + 1];
float valHighR = inputSamples[idxHigh * inputChannels + 1];
outputSamples[i * 2 + 1] = valLowR + t * (valHighR - valLowR);
}
}
else // 3. Multi-channel Output (e.g., 5.1 Surround)
{
for (int c = 0; c < targetChannels; c++)
{
float valLow, valHigh;
if (inputChannels == 1) // Mono -> Mono
if (c < inputChannels)
{
valLow = inputSamples[idxLow];
valHigh = inputSamples[idxHigh];
valLow = inputSamples[idxLow * inputChannels + c];
valHigh = inputSamples[idxHigh * inputChannels + c];
}
else // Multi -> Mono (Downmix: Average all channels)
else
{
float sumLow = 0f;
float sumHigh = 0f;
for (int c = 0; c < inputChannels; c++)
{
sumLow += inputSamples[idxLow * inputChannels + c];
sumHigh += inputSamples[idxHigh * inputChannels + c];
}
valLow = sumLow / inputChannels;
valHigh = sumHigh / inputChannels;
}
outputSamples[i] = valLow + t * (valHigh - valLow);
}
else if (targetChannels == 2) // 2. Stereo Output
{
if (inputChannels == 1) // Mono -> Stereo (Duplicate to Left/Right)
{
float valLow = inputSamples[idxLow];
float valHigh = inputSamples[idxHigh];
float val = valLow + t * (valHigh - valLow);
outputSamples[i * 2] = val;
outputSamples[i * 2 + 1] = val;
}
else // Stereo/Multi -> Stereo (Map Left/Right, ignore extra channels)
{
float valLowL = inputSamples[idxLow * inputChannels];
float valHighL = inputSamples[idxHigh * inputChannels];
outputSamples[i * 2] = valLowL + t * (valHighL - valLowL);
float valLowR = inputSamples[idxLow * inputChannels + 1];
float valHighR = inputSamples[idxHigh * inputChannels + 1];
outputSamples[i * 2 + 1] = valLowR + t * (valHighR - valLowR);
}
}
else // 3. Multi-channel Output (e.g., 5.1 Surround)
{
for (int c = 0; c < targetChannels; c++)
{
float valLow, valHigh;
if (c < inputChannels)
{
valLow = inputSamples[idxLow * inputChannels + c];
valHigh = inputSamples[idxHigh * inputChannels + c];
}
else
{
valLow = inputSamples[idxLow * inputChannels];
valHigh = inputSamples[idxHigh * inputChannels];
}
outputSamples[i * targetChannels + c] = valLow + t * (valHigh - valLow);
valLow = inputSamples[idxLow * inputChannels];
valHigh = inputSamples[idxHigh * inputChannels];
}
outputSamples[i * targetChannels + c] = valLow + t * (valHigh - valLow);
}
}
return outputSamples;
}
return outputSamples;
}
}