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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 StereoPannerNode_h
#define StereoPannerNode_h
#include "base/gtest_prod_util.h"
#include "modules/webaudio/AudioNode.h"
#include "modules/webaudio/AudioParam.h"
#include "platform/audio/AudioBus.h"
#include "platform/audio/Spatializer.h"
namespace blink {
class AbstractAudioContext;
// StereoPannerNode is an AudioNode with one input and one output. It is
// specifically designed for equal-power stereo panning.
class StereoPannerHandler final : public AudioHandler {
public:
static PassRefPtr<StereoPannerHandler> create(AudioNode&, float sampleRate, AudioParamHandler& pan);
~StereoPannerHandler() override;
void process(size_t framesToProcess) override;
void initialize() override;
void setChannelCount(unsigned long, ExceptionState&) final;
void setChannelCountMode(const String&, ExceptionState&) final;
private:
StereoPannerHandler(AudioNode&, float sampleRate, AudioParamHandler& pan);
OwnPtr<Spatializer> m_stereoPanner;
RefPtr<AudioParamHandler> m_pan;
AudioFloatArray m_sampleAccuratePanValues;
FRIEND_TEST_ALL_PREFIXES(StereoPannerNodeTest, StereoPannerLifetime);
};
class StereoPannerNode final : public AudioNode {
DEFINE_WRAPPERTYPEINFO();
public:
static StereoPannerNode* create(AbstractAudioContext&, float sampleRate);
DECLARE_VIRTUAL_TRACE();
AudioParam* pan() const;
private:
StereoPannerNode(AbstractAudioContext&, float sampleRate);
Member<AudioParam> m_pan;
};
} // namespace blink
#endif // StereoPannerNode_h
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