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Fix integer overflow on downsample surround to stereo (#6160)

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gdkchan 2024-01-21 17:11:46 -03:00 committed by GitHub
parent 427b7d06b5
commit edc76883db
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1 changed files with 12 additions and 8 deletions
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20
src/Ryujinx.Audio/Backends/CompatLayer/Downmixing.cs
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@ -31,7 +31,7 @@ namespace Ryujinx.Audio.Backends.CompatLayer
private const int Minus6dBInQ15 = (int)(0.501f * RawQ15One); private const int Minus6dBInQ15 = (int)(0.501f * RawQ15One);
private const int Minus12dBInQ15 = (int)(0.251f * RawQ15One); private const int Minus12dBInQ15 = (int)(0.251f * RawQ15One);
private static readonly int[] _defaultSurroundToStereoCoefficients = new int[4] private static readonly long[] _defaultSurroundToStereoCoefficients = new long[4]
{ {
RawQ15One, RawQ15One,
Minus3dBInQ15, Minus3dBInQ15,
@ -39,7 +39,7 @@ namespace Ryujinx.Audio.Backends.CompatLayer
Minus3dBInQ15, Minus3dBInQ15,
}; };
private static readonly int[] _defaultStereoToMonoCoefficients = new int[2] private static readonly long[] _defaultStereoToMonoCoefficients = new long[2]
{ {
Minus6dBInQ15, Minus6dBInQ15,
Minus6dBInQ15, Minus6dBInQ15,
@ -62,19 +62,23 @@ namespace Ryujinx.Audio.Backends.CompatLayer
} }
[MethodImpl(MethodImplOptions.AggressiveInlining)] [MethodImpl(MethodImplOptions.AggressiveInlining)]
private static short DownMixStereoToMono(ReadOnlySpan<int> coefficients, short left, short right) private static short DownMixStereoToMono(ReadOnlySpan<long> coefficients, short left, short right)
{ {
return (short)((left * coefficients[0] + right * coefficients[1]) >> Q15Bits); return (short)Math.Clamp((left * coefficients[0] + right * coefficients[1]) >> Q15Bits, short.MinValue, short.MaxValue);
} }
[MethodImpl(MethodImplOptions.AggressiveInlining)] [MethodImpl(MethodImplOptions.AggressiveInlining)]
private static short DownMixSurroundToStereo(ReadOnlySpan<int> coefficients, short back, short lfe, short center, short front) private static short DownMixSurroundToStereo(ReadOnlySpan<long> coefficients, short back, short lfe, short center, short front)
{ {
return (short)((coefficients[3] * back + coefficients[2] * lfe + coefficients[1] * center + coefficients[0] * front + RawQ15HalfOne) >> Q15Bits); return (short)Math.Clamp(
(coefficients[3] * back +
coefficients[2] * lfe +
coefficients[1] * center +
coefficients[0] * front + RawQ15HalfOne) >> Q15Bits, short.MinValue, short.MaxValue);
} }
[MethodImpl(MethodImplOptions.AggressiveInlining)] [MethodImpl(MethodImplOptions.AggressiveInlining)]
private static short[] DownMixSurroundToStereo(ReadOnlySpan<int> coefficients, ReadOnlySpan<short> data) private static short[] DownMixSurroundToStereo(ReadOnlySpan<long> coefficients, ReadOnlySpan<short> data)
{ {
int samplePerChannelCount = data.Length / SurroundChannelCount; int samplePerChannelCount = data.Length / SurroundChannelCount;
@ -94,7 +98,7 @@ namespace Ryujinx.Audio.Backends.CompatLayer
} }
[MethodImpl(MethodImplOptions.AggressiveInlining)] [MethodImpl(MethodImplOptions.AggressiveInlining)]
private static short[] DownMixStereoToMono(ReadOnlySpan<int> coefficients, ReadOnlySpan<short> data) private static short[] DownMixStereoToMono(ReadOnlySpan<long> coefficients, ReadOnlySpan<short> data)
{ {
int samplePerChannelCount = data.Length / StereoChannelCount; int samplePerChannelCount = data.Length / StereoChannelCount;