1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138


media / base / frame_buffer_pool_unittest.cc [blame]

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "media/base/frame_buffer_pool.h"

#include "base/test/simple_test_tick_clock.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace media {

constexpr size_t kBufferSize = 1024;

TEST(FrameBufferPool, BasicFunctionality) {
  auto pool = base::MakeRefCounted<FrameBufferPool>();

  void* priv1 = nullptr;
  auto buf1 = pool->GetFrameBuffer(kBufferSize, &priv1);
  ASSERT_FALSE(buf1.empty());
  ASSERT_TRUE(priv1);
  memset(buf1.data(), 0, kBufferSize);

  void* priv2 = nullptr;
  auto buf2 = pool->GetFrameBuffer(kBufferSize, &priv2);
  ASSERT_TRUE(priv2);
  ASSERT_FALSE(buf2.empty());
  EXPECT_NE(priv1, priv2);
  EXPECT_NE(buf1.data(), buf2.data());
  memset(buf2.data(), 0, kBufferSize);

  auto alpha = pool->AllocateAlphaPlaneForFrameBuffer(kBufferSize, priv1);
  ASSERT_FALSE(alpha.empty());
  EXPECT_NE(alpha.data(), buf1.data());
  EXPECT_NE(alpha.data(), buf2.data());
  memset(alpha.data(), 0, kBufferSize);

  EXPECT_EQ(2u, pool->get_pool_size_for_testing());

  // Frames are not released immediately, so this should still show two frames.
  pool->ReleaseFrameBuffer(priv2);
  priv2 = nullptr;
  EXPECT_EQ(2u, pool->get_pool_size_for_testing());

  auto frame_release_cb = pool->CreateFrameCallback(priv1);

  // Shutdown should release all memory that's not held by VideoFrames.
  pool->Shutdown();
  EXPECT_EQ(1u, pool->get_pool_size_for_testing());

  memset(buf1.data(), 0, kBufferSize);
  memset(alpha.data(), 0, kBufferSize);

  // This will release all memory since we're in the shutdown state.
  std::move(frame_release_cb).Run();
  EXPECT_EQ(0u, pool->get_pool_size_for_testing());
}

TEST(FrameBufferPool, ForceAllocationError) {
  auto pool = base::MakeRefCounted<FrameBufferPool>();

  pool->force_allocation_error_for_testing();

  void* priv1 = nullptr;
  auto buf1 = pool->GetFrameBuffer(kBufferSize, &priv1);
  ASSERT_FALSE(priv1);
  ASSERT_TRUE(buf1.empty());
  pool->Shutdown();
}

TEST(FrameBufferPool, DeferredDestruction) {
  auto pool = base::MakeRefCounted<FrameBufferPool>();

  base::SimpleTestTickClock test_clock;
  pool->set_tick_clock_for_testing(&test_clock);

  void* priv1 = nullptr;
  auto buf1 = pool->GetFrameBuffer(kBufferSize, &priv1);
  void* priv2 = nullptr;
  auto buf2 = pool->GetFrameBuffer(kBufferSize, &priv2);
  void* priv3 = nullptr;
  auto buf3 = pool->GetFrameBuffer(kBufferSize, &priv3);
  EXPECT_EQ(3u, pool->get_pool_size_for_testing());

  auto frame_release_cb = pool->CreateFrameCallback(priv1);
  pool->ReleaseFrameBuffer(priv1);
  priv1 = nullptr;
  buf1 = {};
  std::move(frame_release_cb).Run();

  // Frame buffers should not be immediately deleted upon return.
  EXPECT_EQ(3u, pool->get_pool_size_for_testing());

  // Advance some time, but not enough to trigger expiration.
  test_clock.Advance(base::Seconds(FrameBufferPool::kStaleFrameLimitSecs / 2));

  // We should still have 3 frame buffers in the pool at this point.
  frame_release_cb = pool->CreateFrameCallback(priv2);
  pool->ReleaseFrameBuffer(priv2);
  priv2 = nullptr;
  buf2 = {};
  std::move(frame_release_cb).Run();
  EXPECT_EQ(3u, pool->get_pool_size_for_testing());

  test_clock.Advance(base::Seconds(FrameBufferPool::kStaleFrameLimitSecs + 1));

  // All but this most recently released frame should remain now.
  frame_release_cb = pool->CreateFrameCallback(priv3);
  pool->ReleaseFrameBuffer(priv3);
  priv3 = nullptr;
  buf3 = {};
  std::move(frame_release_cb).Run();
  EXPECT_EQ(1u, pool->get_pool_size_for_testing());

  pool->Shutdown();
}

TEST(FrameBufferPool, DoesClearAllocations) {
  auto pool = base::MakeRefCounted<FrameBufferPool>(
      /*zero_initialize_memory=*/true);

  // Certainly this is not foolproof, but even flaky failures here indicate that
  // something is broken.
  void* priv1 = nullptr;
  auto buf = pool->GetFrameBuffer(kBufferSize, &priv1);
  bool nonzero = false;
  for (size_t i = 0; i < kBufferSize; i++) {
    nonzero |= !!buf[i];
  }
  EXPECT_FALSE(nonzero);
  pool->Shutdown();
}

}  // namespace media