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Diffstat (limited to 'plugins/ZamGate/ZamGatePlugin.cpp')
| -rw-r--r-- | plugins/ZamGate/ZamGatePlugin.cpp | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/plugins/ZamGate/ZamGatePlugin.cpp b/plugins/ZamGate/ZamGatePlugin.cpp new file mode 100644 index 0000000..5376a1e --- /dev/null +++ b/plugins/ZamGate/ZamGatePlugin.cpp @@ -0,0 +1,273 @@ +/* + * ZamGate gate plugin + * Copyright (C) 2014 Damien Zammit <damien@zamaudio.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * For a full copy of the GNU General Public License see the doc/GPL.txt file. + */ + +#include "ZamGatePlugin.hpp" + +START_NAMESPACE_DISTRHO + +// ----------------------------------------------------------------------- + +ZamGatePlugin::ZamGatePlugin() + : Plugin(paramCount, 1, 0) // 1 program, 0 states +{ + // set default values + d_setProgram(0); +} + +// ----------------------------------------------------------------------- +// Init + +void ZamGatePlugin::d_initProgramName(uint32_t index, d_string& programName) +{ + if (index != 0) + return; + + programName = "Default"; +} + +// ----------------------------------------------------------------------- +// Internal data + +void ZamGatePlugin::d_initParameter(uint32_t index, Parameter& parameter) +{ + switch (index) + { + case paramAttack: + parameter.hints = kParameterIsAutomable; + parameter.name = "Attack"; + parameter.symbol = "att"; + parameter.unit = "ms"; + parameter.ranges.def = 50.0f; + parameter.ranges.min = 0.1f; + parameter.ranges.max = 500.0f; + break; + case paramRelease: + parameter.hints = kParameterIsAutomable; + parameter.name = "Release"; + parameter.symbol = "rel"; + parameter.unit = "ms"; + parameter.ranges.def = 100.0f; + parameter.ranges.min = 0.1f; + parameter.ranges.max = 500.0f; + break; + case paramThresh: + parameter.hints = kParameterIsAutomable; + parameter.name = "Threshold"; + parameter.symbol = "thr"; + parameter.unit = "dB"; + parameter.ranges.def = -60.0f; + parameter.ranges.min = -60.0f; + parameter.ranges.max = 0.0f; + break; + case paramMakeup: + parameter.hints = kParameterIsAutomable; + parameter.name = "Makeup"; + parameter.symbol = "mak"; + parameter.unit = "dB"; + parameter.ranges.def = 0.0f; + parameter.ranges.min = -30.0f; + parameter.ranges.max = 30.0f; + break; + case paramGainR: + parameter.hints = kParameterIsOutput; + parameter.name = "Gain Reduction"; + parameter.symbol = "gainr"; + parameter.unit = "dB"; + parameter.ranges.def = 0.0f; + parameter.ranges.min = 0.0f; + parameter.ranges.max = 40.0f; + break; + case paramOutputLevel: + parameter.hints = kParameterIsOutput; + parameter.name = "Output Level"; + parameter.symbol = "outlevel"; + parameter.unit = "dB"; + parameter.ranges.def = -45.0f; + parameter.ranges.min = -45.0f; + parameter.ranges.max = 20.0f; + break; + } +} + +// ----------------------------------------------------------------------- +// Internal data + +float ZamGatePlugin::d_getParameterValue(uint32_t index) const +{ + switch (index) + { + case paramAttack: + return attack; + break; + case paramRelease: + return release; + break; + case paramThresh: + return thresdb; + break; + case paramMakeup: + return makeup; + break; + case paramGainR: + return gainr; + break; + case paramOutputLevel: + return outlevel; + break; + default: + return 0.0f; + } +} + +void ZamGatePlugin::d_setParameterValue(uint32_t index, float value) +{ + switch (index) + { + case paramAttack: + attack = value; + break; + case paramRelease: + release = value; + break; + case paramThresh: + thresdb = value; + break; + case paramMakeup: + makeup = value; + break; + case paramGainR: + gainr = value; + break; + case paramOutputLevel: + outlevel = value; + break; + } +} + +void ZamGatePlugin::d_setProgram(uint32_t index) +{ + attack = 50.0; + release = 100.0; + thresdb = -60.0; + gainr = 0.0; + makeup = 0.0; + outlevel = -45.0; + + d_activate(); +} + +// ----------------------------------------------------------------------- +// Process + +void ZamGatePlugin::d_activate() +{ + int i; + gatestatel = 0.f; + gatestater = 0.f; + posl = 0; + posr = 0; + for (i = 0; i < MAX_GATE; i++) { + samplesl[i] = 0.f; + samplesr[i] = 0.f; + } +} + +void ZamGatePlugin::pushsamplel(float samples[], float sample) +{ + ++posl; + if (posl >= MAX_GATE) + posl = 0; + samples[posl] = sample; +} + +void ZamGatePlugin::pushsampler(float samples[], float sample) +{ + ++posr; + if (posr >= MAX_GATE) + posr = 0; + samples[posr] = sample; +} + +float ZamGatePlugin::averageabs(float samples[]) +{ + int i; + float average = 0.f; + + for (i = 0; i < MAX_GATE; i++) { + average += samples[i]*samples[i]; + } + average /= (float) MAX_GATE; + return sqrt(average); +} + +void ZamGatePlugin::d_run(const float** inputs, float** outputs, uint32_t frames) +{ + uint32_t i; + + float absamplel, absampler, absample; + float att; + float rel; + float gl, gr; + float ming; + float fs; + fs = d_getSampleRate(); + gl = gatestatel; + gr = gatestater; + att = 1000.f / (attack * fs); + rel = 1000.f / (release * fs); + + for(i = 0; i < frames; i++) { + pushsamplel(samplesl, inputs[0][i]); + pushsampler(samplesr, inputs[1][i]); + absamplel = averageabs(samplesl); + absampler = averageabs(samplesr); + absample = std::max(absamplel, absampler); + if (absample < from_dB(thresdb)) { + gr -= att; + if (gr < 0.f) + gr = 0.f; + gl -= att; + if (gl < 0.f) + gl = 0.f; + } else { + gr += rel; + if (gr > 1.f) + gr = 1.f; + gl += rel; + if (gl > 1.f) + gl = 1.f; + } + outputs[0][i] = tanh(2.0*gl) * from_dB(makeup) * inputs[0][i]; + outputs[1][i] = tanh(2.0*gr) * from_dB(makeup) * inputs[1][i]; + gatestatel = gl; + gatestater = gr; + ming = std::max(gr, gl); + gainr = -to_dB(ming); + outlevel = to_dB(absample); + } +} + +// ----------------------------------------------------------------------- + +Plugin* createPlugin() +{ + return new ZamGatePlugin(); +} + +// ----------------------------------------------------------------------- + +END_NAMESPACE_DISTRHO |