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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| #pragma once | ||
| #include "HephAudioShared.h" | ||
| #include "AudioEffect.h" | ||
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| /** @file */ | ||
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| namespace HephAudio | ||
| { | ||
| /** | ||
| * @brief applies cubic distortion. | ||
| * | ||
| */ | ||
| class CubicDistortion : public AudioEffect | ||
| { | ||
| protected: | ||
| /** | ||
| * controls the amount of distortion. | ||
| * In the range of [0, 10]. | ||
| * | ||
| */ | ||
| double factor; | ||
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| public: | ||
| /** @copydoc default_constructor */ | ||
| CubicDistortion(); | ||
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| /** | ||
| * @copydoc constructor | ||
| * | ||
| * @param factor @copydetails factor | ||
| * | ||
| */ | ||
| explicit CubicDistortion(double factor); | ||
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| /** @copydoc destructor */ | ||
| virtual ~CubicDistortion() = default; | ||
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| virtual std::string Name() const override; | ||
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| /** | ||
| * gets the factor. | ||
| * | ||
| */ | ||
| virtual double GetFactor() const; | ||
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| /** | ||
| * sets the facotr. | ||
| * | ||
| * @param factor @copydetails factor | ||
| */ | ||
| virtual void SetFactor(double factor); | ||
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| protected: | ||
| virtual void ProcessST(const AudioBuffer& inputBuffer, AudioBuffer& outputBuffer, size_t startIndex, size_t frameCount) override; | ||
| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| #include "AudioEffects/CubicDistortion.h" | ||
| #include "Exceptions/InvalidArgumentException.h" | ||
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| using namespace Heph; | ||
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| namespace HephAudio | ||
| { | ||
| CubicDistortion::CubicDistortion() : CubicDistortion(1.0) {} | ||
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| CubicDistortion::CubicDistortion(double factor) : AudioEffect() | ||
| { | ||
| this->SetFactor(factor); | ||
| } | ||
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| std::string CubicDistortion::Name() const | ||
| { | ||
| return "Cubic Distortion"; | ||
| } | ||
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| double CubicDistortion::GetFactor() const | ||
| { | ||
| return this->factor - 1; | ||
| } | ||
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| void CubicDistortion::SetFactor(double factor) | ||
| { | ||
| if (factor < 0 || factor > 10) | ||
| { | ||
| HEPH_RAISE_AND_THROW_EXCEPTION(this, InvalidArgumentException(HEPH_FUNC, "factor must be in the range of [0, 10].")); | ||
| } | ||
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| this->factor = factor + 1; | ||
| } | ||
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| void CubicDistortion::ProcessST(const AudioBuffer& inputBuffer, AudioBuffer& outputBuffer, size_t startIndex, size_t frameCount) | ||
| { | ||
| const size_t endIndex = startIndex + frameCount; | ||
| const AudioFormatInfo& formatInfo = outputBuffer.FormatInfo(); | ||
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| for (size_t i = startIndex; i < endIndex; ++i) | ||
| { | ||
| for (size_t j = 0; j < formatInfo.channelLayout.count; ++j) | ||
| { | ||
| double fltSample = this->factor * HEPH_AUDIO_SAMPLE_TO_IEEE_FLT(outputBuffer[i][j]); | ||
| fltSample -= fltSample * fltSample * fltSample / 3.0; | ||
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| outputBuffer[i][j] = HEPH_AUDIO_SAMPLE_FROM_IEEE_FLT(HEPH_MATH_MIN(HEPH_MATH_MAX(fltSample, -1.0), 1.0)); | ||
| } | ||
| } | ||
| } | ||
| } |