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/*
* 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 THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_PANNER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_PANNER_H_
#include <memory>
#include "base/macros.h"
#include "third_party/blink/renderer/platform/audio/audio_bus.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
namespace blink {
class HRTFDatabaseLoader;
// Abstract base class for panning a mono or stereo source.
class PLATFORM_EXPORT Panner {
USING_FAST_MALLOC(Panner);
public:
// This values are used in histograms and should not be renumbered or deleted.
enum { kPanningModelEqualPower = 0, kPanningModelHRTF = 1 };
typedef unsigned PanningModel;
static std::unique_ptr<Panner> Create(PanningModel,
float sample_rate,
HRTFDatabaseLoader*);
virtual ~Panner() = default;
virtual void Pan(double azimuth,
double elevation,
const AudioBus* input_bus,
AudioBus* output_bus,
uint32_t frames_to_process,
AudioBus::ChannelInterpretation) = 0;
virtual void PanWithSampleAccurateValues(double* azimuth,
double* elevation,
const AudioBus* input_bus,
AudioBus* output_bus,
uint32_t frames_to_process,
AudioBus::ChannelInterpretation) = 0;
virtual void Reset() = 0;
virtual double TailTime() const = 0;
virtual double LatencyTime() const = 0;
virtual bool RequiresTailProcessing() const = 0;
protected:
Panner(PanningModel model) : panning_model_(model) {}
PanningModel panning_model_;
private:
DISALLOW_COPY_AND_ASSIGN(Panner);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_PANNER_H_