Added makeup gain and dry wet mix

Sources/CSoundpipeAudioKit/Effects/DynamicRangeCompressorDSP.mm

@@ -9,6 +9,8 @@
  DynamicRangeCompressorParameterThreshold,
  DynamicRangeCompressorParameterAttackDuration,
  DynamicRangeCompressorParameterReleaseDuration,
+ DynamicRangeCompressorParameterGain,
+ DynamicRangeCompressorParameterDryWetMix,
 };
 
 class DynamicRangeCompressorDSP : public SoundpipeDSPBase {
@@ -19,13 +21,17 @@
  ParameterRamper thresholdRamp;
  ParameterRamper attackDurationRamp;
  ParameterRamper releaseDurationRamp;
+ ParameterRamper gainRamp;
+ ParameterRamper dryWetMixRamp;
 
 public:
  DynamicRangeCompressorDSP() {
  parameters[DynamicRangeCompressorParameterRatio] = &ratioRamp;
  parameters[DynamicRangeCompressorParameterThreshold] = &thresholdRamp;
  parameters[DynamicRangeCompressorParameterAttackDuration] = &attackDurationRamp;
  parameters[DynamicRangeCompressorParameterReleaseDuration] = &releaseDurationRamp;
+ parameters[DynamicRangeCompressorParameterGain] = &gainRamp;
+ parameters[DynamicRangeCompressorParameterDryWetMix] = &dryWetMixRamp;
  }
 
  void init(int channelCount, double sampleRate) override {
@@ -64,6 +70,14 @@ void process(FrameRange range) override {
 
  sp_compressor_compute(sp, compressor0, &leftIn, &leftOut);
  sp_compressor_compute(sp, compressor1, &rightIn, &rightOut);
+
+ float gain = gainRamp.getAndStep();
+ leftOut *= gain;
+ rightOut *= gain;
+
+ float dryWetMix = dryWetMixRamp.getAndStep();
+ outputSample(0, i) = dryWetMix * leftOut + (1.0f - dryWetMix) * leftIn;
+ outputSample(1, i) = dryWetMix * rightOut + (1.0f - dryWetMix) * rightIn;
  }
  }
 };
@@ -73,3 +87,5 @@ void process(FrameRange range) override {
 AK_REGISTER_PARAMETER(DynamicRangeCompressorParameterThreshold)
 AK_REGISTER_PARAMETER(DynamicRangeCompressorParameterAttackDuration)
 AK_REGISTER_PARAMETER(DynamicRangeCompressorParameterReleaseDuration)
+AK_REGISTER_PARAMETER(DynamicRangeCompressorParameterGain)
+AK_REGISTER_PARAMETER(DynamicRangeCompressorParameterDryWetMix)

Sources/SoundpipeAudioKit/Effects/DynamicRangeCompressor.swift

@@ -69,6 +69,32 @@ public class DynamicRangeCompressor: Node {
 
  /// Release Duration
  @Parameter(releaseDurationDef) public var releaseDuration: AUValue
+
+ /// Specification details for gain
+ public static let gainDef = NodeParameterDef(
+ identifier: "gain",
+ name: "Makeup Gain",
+ address: akGetParameterAddress("DynamicRangeCompressorParameterGain"),
+ defaultValue: 1.0,
+ range: 0.0 ... 8.0,
+ unit: .linearGain
+ )
+
+ /// Makeup gain applied only to processed signal
+ @Parameter(gainDef) public var gain: AUValue
+
+ /// Specification details for dryWetMix
+ public static let dryWetMixDef = NodeParameterDef(
+ identifier: "dryWetMix",
+ name: "Dry/Wet Mix",
+ address: akGetParameterAddress("DynamicRangeCompressorParameterDryWetMix"),
+ defaultValue: 1.0,
+ range: 0.0 ... 1.0,
+ unit: .percent
+ )
+
+ /// Dry/Wet Mix
+ @Parameter(dryWetMixDef) public var dryWetMix: AUValue
 
  // MARK: - Initialization
 
@@ -80,13 +106,17 @@ public class DynamicRangeCompressor: Node {
  /// - threshold: Threshold (in dB) 0 = max
  /// - attackDuration: Attack duration
  /// - releaseDuration: Release Duration
+ /// - gain: Makeup gain (applied only to processing)
+ /// - dryWetMix: Dry/Wet Mix
  ///
  public init(
  _ input: Node,
  ratio: AUValue = ratioDef.defaultValue,
  threshold: AUValue = thresholdDef.defaultValue,
  attackDuration: AUValue = attackDurationDef.defaultValue,
- releaseDuration: AUValue = releaseDurationDef.defaultValue
+ releaseDuration: AUValue = releaseDurationDef.defaultValue,
+ gain: AUValue = gainDef.defaultValue,
+ dryWetMix: AUValue = dryWetMixDef.defaultValue
  ) {
  self.input = input
 
@@ -96,5 +126,7 @@ public class DynamicRangeCompressor: Node {
  self.threshold = threshold
  self.attackDuration = attackDuration
  self.releaseDuration = releaseDuration
+ self.gain = gain
+ self.dryWetMix = dryWetMix
  }
 }