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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 {
38 static PassRefPtrWillBeRawPtr<DynamicsCompressorNode> create(AudioContext* context, float sampleRate)
40 return adoptRefWillBeNoop(new DynamicsCompressorNode(context, sampleRate));
43 virtual ~DynamicsCompressorNode();
46 virtual void process(size_t framesToProcess) OVERRIDE;
47 virtual void initialize() OVERRIDE;
48 virtual void uninitialize() OVERRIDE;
50 // Static compression curve parameters.
51 AudioParam* threshold() { return m_threshold.get(); }
52 AudioParam* knee() { return m_knee.get(); }
53 AudioParam* ratio() { return m_ratio.get(); }
54 AudioParam* attack() { return m_attack.get(); }
55 AudioParam* release() { return m_release.get(); }
57 // Amount by which the compressor is currently compressing the signal in decibels.
58 AudioParam* reduction() { return m_reduction.get(); }
60 virtual void trace(Visitor*) OVERRIDE;
63 virtual double tailTime() const OVERRIDE;
64 virtual double latencyTime() const OVERRIDE;
66 DynamicsCompressorNode(AudioContext*, float sampleRate);
68 OwnPtr<DynamicsCompressor> m_dynamicsCompressor;
69 RefPtrWillBeMember<AudioParam> m_threshold;
70 RefPtrWillBeMember<AudioParam> m_knee;
71 RefPtrWillBeMember<AudioParam> m_ratio;
72 RefPtrWillBeMember<AudioParam> m_reduction;
73 RefPtrWillBeMember<AudioParam> m_attack;
74 RefPtrWillBeMember<AudioParam> m_release;
77 } // namespace WebCore
79 #endif // DynamicsCompressorNode_h