/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "PeriodicWave.h"

#include "AudioContext.h"

#include "mozilla/dom/PeriodicWaveBinding.h"

namespace mozilla {

namespace dom {

NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(PeriodicWave, mContext)

NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(PeriodicWave, AddRef)

NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(PeriodicWave, Release)

PeriodicWave::PeriodicWave(AudioContext* aContext,

                           const float* aRealData,

                           const float* aImagData,

                           const uint32_t aLength,

                           const bool aDisableNormalization,

                           ErrorResult& aRv)

  : mContext(aContext)

  , mDisableNormalization(aDisableNormalization)

{

  MOZ_ASSERT(aContext);

  MOZ_ASSERT((aRealData || aImagData) || aLength == 2);

  // Caller should have checked this and thrown.

  MOZ_ASSERT(aLength > 0);

  mCoefficients.mDuration = aLength;

  // Copy coefficient data.

  // The SharedBuffer and two arrays share a single allocation.

  RefPtr<SharedBuffer> buffer =

    SharedBuffer::Create(sizeof(float) * aLength * 2, fallible);

  if (!buffer) {

    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);

    return;

  }

  auto data = static_cast<float*>(buffer->Data());

  mCoefficients.mBuffer = std::move(buffer);

  if (!aRealData && !aImagData) {

    PodZero(data, aLength);

    mCoefficients.mChannelData.AppendElement(data);

    data += aLength;

    data[0] = 0.0f;

    data[1] = 1.0f;

    mCoefficients.mChannelData.AppendElement(data);

  } else {

    if (aRealData) {

      PodCopy(data, aRealData, aLength);

    } else {

      PodZero(data, aLength);

    }

    mCoefficients.mChannelData.AppendElement(data);

    data += aLength;

    if (aImagData) {

      PodCopy(data, aImagData, aLength);

    } else {

      PodZero(data, aLength);

    }

    mCoefficients.mChannelData.AppendElement(data);

  }

  mCoefficients.mVolume = 1.0f;

  mCoefficients.mBufferFormat = AUDIO_FORMAT_FLOAT32;

}

/* static */ already_AddRefed<PeriodicWave>

PeriodicWave::Constructor(const GlobalObject& aGlobal,

                          AudioContext& aAudioContext,

                          const PeriodicWaveOptions& aOptions,

                          ErrorResult& aRv)

{

  if (aOptions.mReal.WasPassed() && aOptions.mImag.WasPassed() &&

      aOptions.mReal.Value().Length() != aOptions.mImag.Value().Length()) {

    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);

    return nullptr;

  }

  uint32_t length = 0;

  if (aOptions.mReal.WasPassed()) {

    length = aOptions.mReal.Value().Length();

  } else if (aOptions.mImag.WasPassed()) {

    length = aOptions.mImag.Value().Length();

  } else {

    // If nothing has been passed, this PeriodicWave will be a sine wave: 2

    // elements for each array, the second imaginary component set to 1.0.

    length = 2;

  }

  if (length == 0) {

    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);

    return nullptr;

  }

  const float* realData =

    aOptions.mReal.WasPassed() ? aOptions.mReal.Value().Elements() : nullptr;

  const float* imagData =

    aOptions.mImag.WasPassed() ? aOptions.mImag.Value().Elements() : nullptr;

  RefPtr<PeriodicWave> wave =

    new PeriodicWave(&aAudioContext, realData, imagData, length,

                     aOptions.mDisableNormalization, aRv);

  if (aRv.Failed()) {

    return nullptr;

  }

  return wave.forget();

}

size_t

PeriodicWave::SizeOfExcludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const

{

  // Not owned:

  // - mContext

  size_t amount = 0;

  amount += mCoefficients.SizeOfExcludingThisIfUnshared(aMallocSizeOf);

  return amount;

}

size_t

PeriodicWave::SizeOfIncludingThisIfNotShared(MallocSizeOf aMallocSizeOf) const

{

  return aMallocSizeOf(this) + SizeOfExcludingThisIfNotShared(aMallocSizeOf);

}

JSObject*

PeriodicWave::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)

{

  return PeriodicWave_Binding::Wrap(aCx, this, aGivenProto);

}

} // namespace dom

} // namespace mozilla