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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef Spatializer_h
#define Spatializer_h
#include "platform/PlatformExport.h"
#include "platform/heap/Handle.h"
namespace blink {
class AudioBus;
// Abstract base class for spatializing a mono or stereo source.
class PLATFORM_EXPORT Spatializer : public GarbageCollected<Spatializer> {
public:
enum {
PanningModelEqualPower = 0
// We have a plan to add more panning models other than equal-power.
// (such as binaural-HRTF or N-channel surround panning)
};
typedef unsigned PanningModel;
static Spatializer* create(PanningModel, float sampleRate);
// Handle sample-accurate panning by AudioParam automation.
virtual void panWithSampleAccurateValues(const AudioBus* inputBus, AudioBus* outputBuf, const float* panValues, size_t framesToProcess) = 0;
// Handle de-zippered panning to a target value.
virtual void panToTargetValue(const AudioBus* inputBus, AudioBus* outputBuf, float panValue, size_t framesToProcess) = 0;
virtual void reset() = 0;
virtual double tailTime() const = 0;
virtual double latencyTime() const = 0;
virtual void trace(Visitor*) { }
protected:
explicit Spatializer(PanningModel model) { }
};
} // namespace blink
#endif // Spatializer_h
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