/*
* Copyright (C) 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef Panner_h
#define Panner_h
#include "platform/PlatformExport.h"
#include "wtf/PassOwnPtr.h"
namespace WebCore {
class AudioBus;
class HRTFDatabaseLoader;
// Abstract base class for panning a mono or stereo source.
class PLATFORM_EXPORT Panner {
public:
enum {
PanningModelEqualPower = 0,
PanningModelHRTF = 1
};
typedef unsigned PanningModel;
static PassOwnPtr<Panner> create(PanningModel, float sampleRate, HRTFDatabaseLoader*);
virtual ~Panner() { };
PanningModel panningModel() const { return m_panningModel; }
virtual void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess) = 0;
virtual void reset() = 0;
virtual double tailTime() const = 0;
virtual double latencyTime() const = 0;
protected:
Panner(PanningModel model) : m_panningModel(model) { }
PanningModel m_panningModel;
};
} // namespace WebCore
#endif // Panner_h