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31 #ifndef AudioDSPKernelProcessor_h
32 #define AudioDSPKernelProcessor_h
34 #include "platform/audio/AudioBus.h"
35 #include "platform/audio/AudioProcessor.h"
36 #include "wtf/OwnPtr.h"
37 #include "wtf/PassOwnPtr.h"
38 #include "wtf/ThreadingPrimitives.h"
39 #include "wtf/Vector.h"
47 // AudioDSPKernelProcessor processes one input -> one output (N channels each)
48 // It uses one AudioDSPKernel object per channel to do the processing, thus there is no cross-channel processing.
49 // Despite this limitation it turns out to be a very common and useful type of processor.
51 class PLATFORM_EXPORT AudioDSPKernelProcessor : public AudioProcessor {
53 // numberOfChannels may be later changed if object is not yet in an "initialized" state
54 AudioDSPKernelProcessor(float sampleRate, unsigned numberOfChannels);
55 virtual ~AudioDSPKernelProcessor();
57 // Subclasses create the appropriate type of processing kernel here.
58 // We'll call this to create a kernel for each channel.
59 virtual PassOwnPtr<AudioDSPKernel> createKernel() = 0;
61 // AudioProcessor methods
62 virtual void initialize() override;
63 virtual void uninitialize() override;
64 virtual void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) override;
65 virtual void reset() override;
66 virtual void setNumberOfChannels(unsigned) override;
67 virtual unsigned numberOfChannels() const override { return m_numberOfChannels; }
69 virtual double tailTime() const override;
70 virtual double latencyTime() const override;
73 Vector<OwnPtr<AudioDSPKernel> > m_kernels;
74 mutable Mutex m_processLock;
80 #endif // AudioDSPKernelProcessor_h