The Tor Browser: content/media/gtest/TestAudioCompactor.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

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

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

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

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

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

     6 #include "gtest/gtest.h"

     7 #include "AudioCompactor.h"

     8 #include "MediaDecoderReader.h"

    10 using mozilla::AudioCompactor;

    11 using mozilla::AudioData;

    12 using mozilla::AudioDataValue;

    13 using mozilla::MediaDecoderReader;

    14 using mozilla::MediaQueue;

    16 class MemoryFunctor : public nsDequeFunctor {

    17 public:

    18   MemoryFunctor() : mSize(0) {}

    19   MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);

    21   virtual void* operator()(void* anObject) {

    22     const AudioData* audioData = static_cast<const AudioData*>(anObject);

    23     mSize += audioData->SizeOfIncludingThis(MallocSizeOf);

    24     return nullptr;

    25   }

    27   size_t mSize;

    28 };

    30 class TestCopy

    31 {

    32 public:

    33   TestCopy(uint32_t aFrames, uint32_t aChannels,

    34            uint32_t &aCallCount, uint32_t &aFrameCount)

    35     : mFrames(aFrames)

    36     , mChannels(aChannels)

    37     , mCallCount(aCallCount)

    38     , mFrameCount(aFrameCount)

    39   { }

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

    42   {

    43     mCallCount += 1;

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

    45     mFrameCount += frames;

    46     return frames;

    47   }

    49 private:

    50   const uint32_t mFrames;

    51   const uint32_t mChannels;

    52   uint32_t &mCallCount;

    53   uint32_t &mFrameCount;

    54 };

    56 static void TestAudioCompactor(size_t aBytes)

    57 {

    58   MediaQueue<AudioData> queue;

    59   AudioCompactor compactor(queue);

    61   uint64_t offset = 0;

    62   uint64_t time = 0;

    63   uint32_t sampleRate = 44000;

    64   uint32_t channels = 2;

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

    66   size_t maxSlop = aBytes / AudioCompactor::MAX_SLOP_DIVISOR;

    68   uint32_t callCount = 0;

    69   uint32_t frameCount = 0;

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

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

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

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

    77   MemoryFunctor memoryFunc;

    78   queue.LockedForEach(memoryFunc);

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

    80   size_t slop = allocSize - aBytes;

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

    82 }

    84 TEST(Media, AudioCompactor_4000)

    85 {

    86   TestAudioCompactor(4000);

    87 }

    89 TEST(Media, AudioCompactor_4096)

    90 {

    91   TestAudioCompactor(4096);

    92 }

    94 TEST(Media, AudioCompactor_5000)

    95 {

    96   TestAudioCompactor(5000);

    97 }

    99 TEST(Media, AudioCompactor_5256)

   100 {

   101   TestAudioCompactor(5256);

   102 }

   104 TEST(Media, AudioCompactor_NativeCopy)

   105 {

   106   const uint32_t channels = 2;

   107   const size_t srcBytes = 32;

   108   const uint32_t srcSamples = srcBytes / sizeof(AudioDataValue);

   109   const uint32_t srcFrames = srcSamples / channels;

   110   uint8_t src[srcBytes];

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

   113     src[i] = i;

   114   }

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

   118   const uint32_t dstSamples = srcSamples * 2;

   119   AudioDataValue dst[dstSamples];

   121   const AudioDataValue notCopied = 0xffff;

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

   123     dst[i] = notCopied;

   124   }

   126   const uint32_t copyCount = 8;

   127   uint32_t copiedFrames = 0;

   128   uint32_t nextSample = 0;

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

   130     uint32_t copySamples = dstSamples / copyCount;

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

   132     nextSample += copySamples;

   133   }

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

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

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

   139     if (i < srcSamples) {

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

   141     } else {

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

   143     }

   144   }

   145 }

The Tor Browser / file revision

content/media/gtest/TestAudioCompactor.cpp@97036ab72558

content/media/gtest/TestAudioCompactor.cpp