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25 #ifndef DynamicsCompressorNode_h
26 #define DynamicsCompressorNode_h
28 #include "modules/webaudio/AudioNode.h"
29 #include "modules/webaudio/AudioParam.h"
30 #include "wtf/OwnPtr.h"
34 class DynamicsCompressor;
36 class DynamicsCompressorNode final : public AudioNode {
37 DEFINE_WRAPPERTYPEINFO();
39 static DynamicsCompressorNode* create(AudioContext* context, float sampleRate)
41 return new DynamicsCompressorNode(context, sampleRate);
44 virtual ~DynamicsCompressorNode();
47 virtual void dispose() override;
48 virtual void process(size_t framesToProcess) override;
49 virtual void initialize() override;
50 virtual void uninitialize() override;
51 virtual void clearInternalStateWhenDisabled() override;
53 // Static compression curve parameters.
54 AudioParam* threshold() { return m_threshold.get(); }
55 AudioParam* knee() { return m_knee.get(); }
56 AudioParam* ratio() { return m_ratio.get(); }
57 AudioParam* attack() { return m_attack.get(); }
58 AudioParam* release() { return m_release.get(); }
60 // Amount by which the compressor is currently compressing the signal in decibels.
61 AudioParam* reduction() { return m_reduction.get(); }
63 virtual void trace(Visitor*) override;
66 virtual double tailTime() const override;
67 virtual double latencyTime() const override;
69 DynamicsCompressorNode(AudioContext*, float sampleRate);
71 OwnPtr<DynamicsCompressor> m_dynamicsCompressor;
72 Member<AudioParam> m_threshold;
73 Member<AudioParam> m_knee;
74 Member<AudioParam> m_ratio;
75 Member<AudioParam> m_reduction;
76 Member<AudioParam> m_attack;
77 Member<AudioParam> m_release;
82 #endif // DynamicsCompressorNode_h