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/*
* Copyright (C) 2010 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_HRTF_DATABASE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_HRTF_DATABASE_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/audio/hrtf_elevation.h"
#include "third_party/blink/renderer/platform/wtf/allocator/allocator.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class HRTFKernel;
class HRTFDatabase final {
USING_FAST_MALLOC(HRTFDatabase);
public:
explicit HRTFDatabase(float sample_rate);
HRTFDatabase(const HRTFDatabase&) = delete;
HRTFDatabase& operator=(const HRTFDatabase&) = delete;
// Returns the number of different azimuth angles.
static unsigned NumberOfAzimuths();
// Returns the number of elevations loaded from resource.
static unsigned NumberOfRawElevations();
// getKernelsFromAzimuthElevation() returns a left and right ear kernel, and
// an interpolated left and right frame delay for the given azimuth and
// elevation.
// azimuthBlend must be in the range 0 -> 1.
// Valid values for azimuthIndex are
// 0 -> HRTFElevation::NumberOfTotalAzimuths - 1
// (corresponding to angles of 0 -> 360).
// Valid values for elevationAngle are MinElevation -> MaxElevation.
void GetKernelsFromAzimuthElevation(double azimuth_blend,
unsigned azimuth_index,
double elevation_angle,
HRTFKernel*& kernel_l,
HRTFKernel*& kernel_r,
double& frame_delay_l,
double& frame_delay_r) const;
private:
Vector<std::unique_ptr<HRTFElevation>> elevations_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_HRTF_DATABASE_H_
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