| 64 | } |
| 65 | |
| 66 | void DistortionEffect::ProcessAudio(double time, ChannelBuffer* buffer) |
| 67 | { |
| 68 | PROFILER(DistortionEffect); |
| 69 | |
| 70 | if (!mEnabled) |
| 71 | return; |
| 72 | |
| 73 | float bufferSize = buffer->BufferSize(); |
| 74 | |
| 75 | for (int ch = 0; ch < buffer->NumActiveChannels(); ++ch) |
| 76 | { |
| 77 | if (mRemoveInputDC) |
| 78 | mDCRemover[ch].Filter(buffer->GetChannel(ch), bufferSize); |
| 79 | |
| 80 | mPeakTracker[ch].Process(buffer->GetChannel(ch), bufferSize); |
| 81 | |
| 82 | if (mType == kDirty) |
| 83 | { |
| 84 | for (int i = 0; i < bufferSize; ++i) |
| 85 | { |
| 86 | ComputeSliders(i); |
| 87 | buffer->GetChannel(ch)[i] = (ofClamp((buffer->GetChannel(ch)[i] + mFuzzAmount * mPeakTracker[ch].GetPeak()) * mPreamp * mGain, -1, 1)) / mGain; |
| 88 | } |
| 89 | } |
| 90 | else if (mType == kClean) |
| 91 | { |
| 92 | for (int i = 0; i < bufferSize; ++i) |
| 93 | { |
| 94 | ComputeSliders(i); |
| 95 | buffer->GetChannel(ch)[i] = tanh((buffer->GetChannel(ch)[i] + mFuzzAmount * mPeakTracker[ch].GetPeak()) * mPreamp * mGain) / mGain; |
| 96 | } |
| 97 | } |
| 98 | else if (mType == kWarm) |
| 99 | { |
| 100 | for (int i = 0; i < bufferSize; ++i) |
| 101 | { |
| 102 | ComputeSliders(i); |
| 103 | buffer->GetChannel(ch)[i] = sin((buffer->GetChannel(ch)[i] + mFuzzAmount * mPeakTracker[ch].GetPeak()) * mPreamp * mGain) / mGain; |
| 104 | } |
| 105 | } |
| 106 | else if (mType == kGrungy) |
| 107 | { |
| 108 | for (int i = 0; i < bufferSize; ++i) |
| 109 | { |
| 110 | ComputeSliders(i); |
| 111 | buffer->GetChannel(ch)[i] = asin(ofClamp((buffer->GetChannel(ch)[i] + mFuzzAmount * mPeakTracker[ch].GetPeak()) * mPreamp * mGain, -1, 1)) / mGain; |
| 112 | } |
| 113 | } |
| 114 | //soft and asymmetric from http://www.music.mcgill.ca/~gary/courses/projects/618_2009/NickDonaldson/#Distortion |
| 115 | else if (mType == kSoft) |
| 116 | { |
| 117 | for (int i = 0; i < bufferSize; ++i) |
| 118 | { |
| 119 | ComputeSliders(i); |
| 120 | float sample = (buffer->GetChannel(ch)[i] + mFuzzAmount * mPeakTracker[ch].GetPeak()) * mPreamp * mGain; |
| 121 | if (sample > 1) |
| 122 | sample = .66666f; |
| 123 | else if (sample < -1) |
nothing calls this directly
no test coverage detected