/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 "gtest/gtest.h"

#include "AudioCompactor.h"

#include "nsIMemoryReporter.h"

using mozilla::AudioCompactor;

using mozilla::AudioData;

using mozilla::AudioDataValue;

using mozilla::MediaQueue;

class MemoryFunctor : public nsDequeFunctor {

public:

  MemoryFunctor() : mSize(0) {}

  MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);

  void operator()(void* aObject) override

  {

    const AudioData* audioData = static_cast<const AudioData*>(aObject);

    mSize += audioData->SizeOfIncludingThis(MallocSizeOf);

  }

  size_t mSize;

};

class TestCopy

{

public:

  TestCopy(uint32_t aFrames, uint32_t aChannels,

           uint32_t &aCallCount, uint32_t &aFrameCount)

    : mFrames(aFrames)

    , mChannels(aChannels)

    , mCallCount(aCallCount)

    , mFrameCount(aFrameCount)

  { }

  uint32_t operator()(AudioDataValue *aBuffer, uint32_t aSamples)

  {

    mCallCount += 1;

    uint32_t frames = std::min(mFrames - mFrameCount, aSamples / mChannels);

    mFrameCount += frames;

    return frames;

  }

private:

  const uint32_t mFrames;

  const uint32_t mChannels;

  uint32_t &mCallCount;

  uint32_t &mFrameCount;

};

static void TestAudioCompactor(size_t aBytes)

{

  MediaQueue<AudioData> queue;

  AudioCompactor compactor(queue);

  uint64_t offset = 0;

  uint64_t time = 0;

  uint32_t sampleRate = 44000;

  uint32_t channels = 2;

  uint32_t frames = aBytes / (channels * sizeof(AudioDataValue));

  size_t maxSlop = aBytes / AudioCompactor::MAX_SLOP_DIVISOR;

  uint32_t callCount = 0;

  uint32_t frameCount = 0;

  compactor.Push(offset, time, sampleRate, frames, channels,

                 TestCopy(frames, channels, callCount, frameCount));

  EXPECT_GT(callCount, 0U) << "copy functor never called";

  EXPECT_EQ(frames, frameCount) << "incorrect number of frames copied";

  MemoryFunctor memoryFunc;

  queue.LockedForEach(memoryFunc);

  size_t allocSize = memoryFunc.mSize - (callCount * sizeof(AudioData));

  size_t slop = allocSize - aBytes;

  EXPECT_LE(slop, maxSlop) << "allowed too much allocation slop";

}

TEST(Media, AudioCompactor_4000)

{

  TestAudioCompactor(4000);

}

TEST(Media, AudioCompactor_4096)

{

  TestAudioCompactor(4096);

}

TEST(Media, AudioCompactor_5000)

{

  TestAudioCompactor(5000);

}

TEST(Media, AudioCompactor_5256)

{

  TestAudioCompactor(5256);

}

TEST(Media, AudioCompactor_NativeCopy)

{

  const uint32_t channels = 2;

  const size_t srcBytes = 32;

  const uint32_t srcSamples = srcBytes / sizeof(AudioDataValue);

  const uint32_t srcFrames = srcSamples / channels;

  uint8_t src[srcBytes];

  for (uint32_t i = 0; i < srcBytes; ++i) {

    src[i] = i;

  }

  AudioCompactor::NativeCopy copy(src, srcBytes, channels);

  const uint32_t dstSamples = srcSamples * 2;

  AudioDataValue dst[dstSamples];

  const AudioDataValue notCopied = 0xffff;

  for (uint32_t i = 0; i < dstSamples; ++i) {

    dst[i] = notCopied;

  }

  const uint32_t copyCount = 8;

  uint32_t copiedFrames = 0;

  uint32_t nextSample = 0;

  for (uint32_t i = 0; i < copyCount; ++i) {

    uint32_t copySamples = dstSamples / copyCount;

    copiedFrames += copy(dst + nextSample, copySamples);

    nextSample += copySamples;

  }

  EXPECT_EQ(srcFrames, copiedFrames) << "copy exact number of source frames";

  // Verify that the only the correct bytes were copied.

  for (uint32_t i = 0; i < dstSamples; ++i) {

    if (i < srcSamples) {

      EXPECT_NE(notCopied, dst[i]) << "should have copied over these bytes";

    } else {

      EXPECT_EQ(notCopied, dst[i]) << "should not have copied over these bytes";

    }

  }

}