MediaCodecLoop unit tests

media/base/android/media_codec_loop_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "media/base/android/media_codec_bridge.h"
 #include "media/base/android/media_codec_loop.h"
+#include "media/base/android/mock_media_codec_bridge.h"
+#include "media/base/fake_single_thread_task_runner.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using ::testing::_;
+using ::testing::AtLeast;
+using ::testing::Eq;
+using ::testing::Field;
+using ::testing::InSequence;
+using ::testing::Mock;
+using ::testing::Return;
+using ::testing::SetArgPointee;
+using ::testing::StrictMock;
+
 namespace media {
 
-class MockMediaCodecLoopClient : public MediaCodecLoop::Client {
+// These will come from mockable BuildInfo, once it exists.
+enum TemporaryAndroidVersions {
+  kJellyBeanMR1 = 17,
+  kJellyBeanMR2 = 18,
+  kLollipop = 21,
+};
+
+// The client is a strict mock, since we don't want random calls into it.  We
+// want to be sure about the call sequence.
+class MockMediaCodecLoopClient : public StrictMock<MediaCodecLoop::Client> {
  public:
   MOCK_CONST_METHOD0(IsAnyInputPending, bool());
   MOCK_METHOD0(ProvideInputData, MediaCodecLoop::InputData());
   MOCK_METHOD1(OnInputDataQueued, void(bool));
   MOCK_METHOD1(OnDecodedEos, void(const MediaCodecLoop::OutputBuffer&));
   MOCK_METHOD1(OnDecodedFrame, bool(const MediaCodecLoop::OutputBuffer&));
   MOCK_METHOD0(OnOutputFormatChanged, bool());
   MOCK_METHOD0(OnCodecLoopError, void());
 };
 
 class MediaCodecLoopTest : public testing::Test {
  public:
-  MediaCodecLoopTest() : client_(new MockMediaCodecLoopClient) {}
+  MediaCodecLoopTest()
+      : client_(new StrictMock<MockMediaCodecLoopClient>()),
+        task_runner_(new FakeSingleThreadTaskRunner(&clock_)) {}
+
+  ~MediaCodecLoopTest() override {}
+
+ protected:
+  enum IdleExpectation {
+    ShouldBeIdle,
+    ShouldNotBeIdle,
+  };
+
+  // Wait until |codec_loop_| is idle.
+  // Do not call this in a sequence.
+  void WaitUntilIdle(IdleExpectation idleExpectation = ShouldBeIdle) {
+    switch (idleExpectation) {
+      case ShouldBeIdle:
+        EXPECT_CALL(*client_, IsAnyInputPending()).Times(0);
+        EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _)).Times(0);
+        break;
+      case ShouldNotBeIdle:
+        // Expect at least one call to see if more work is ready.  We will
+        // return 'no'.
+        EXPECT_CALL(*client_, IsAnyInputPending())
+            .Times(AtLeast(1))
+            .WillRepeatedly(Return(false));
+        EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+            .Times(AtLeast(1))
+            .WillRepeatedly(Return(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER));
+        break;
+    }
+
+    // Either way, we expect that MCL should not attempt to dequeue input
+    // buffers, either because it's idle or because we said that no input
+    // is pending.
+    EXPECT_CALL(Codec(), DequeueInputBuffer(_, _)).Times(0);
+
+    // TODO(liberato): assume that MCL doesn't retry for 30 seconds.  Note
+    // that this doesn't actually wall-clock wait.
+    task_runner_->Sleep(base::TimeDelta::FromSeconds(30));
+  }
+
+  void ConstructCodecLoop(int sdk_int = kLollipop) {
+    std::unique_ptr<MediaCodecBridge> codec(new MockMediaCodecBridge());
+    // Since we're providing a codec, we do not expect an error.
+    EXPECT_CALL(*client_, OnCodecLoopError()).Times(0);
+    codec_loop_.reset(new MediaCodecLoop(sdk_int, client_.get(),
+                                         std::move(codec), task_runner_));
+    codec_loop_->SetTestTickClock(&clock_);
+    Mock::VerifyAndClearExpectations(client_.get());
+    // We might want to WaitUntilIdle here.

[watk, 2016/08/09 18:32:55]

Not sure what you mean by this

[liberato (no reviews please), 2016/08/09 21:20:47]

doesn't mean much anymore.  removed.

+  }
+
+  // Set an expectation that MCL will try to get another input / output buffer,
+  // and not get one in DoPendingWork.
+  void ExpectEmptyIOLoop() {
+    ExpectIsAnyInputPending(false);
+    EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+        .Times(1)
+        .WillOnce(Return(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER));
+  }
+
+  void ExpectIsAnyInputPending(bool pending) {
+    EXPECT_CALL(*client_, IsAnyInputPending()).WillOnce(Return(pending));
+  }
+
+  void ExpectDequeueInputBuffer(int input_buffer_index,
+                                MediaCodecStatus status = MEDIA_CODEC_OK) {
+    EXPECT_CALL(Codec(), DequeueInputBuffer(_, _))
+        .WillOnce(DoAll(SetArgPointee<1>(input_buffer_index), Return(status)));
+  }
+
+  void ExpectInputDataQueued(bool success) {
+    EXPECT_CALL(*client_, OnInputDataQueued(success)).Times(1);
+  }
+
+  // Expect a call to queue |data| into MC buffer |input_buffer_index|.
+  void ExpectQueueInputBuffer(int input_buffer_index,
+                              const MediaCodecLoop::InputData& data,
+                              MediaCodecStatus status = MEDIA_CODEC_OK) {
+    EXPECT_CALL(Codec(), QueueInputBuffer(input_buffer_index, data.memory,
+                                          data.length, data.presentation_time))
+        .Times(1)
+        .WillOnce(Return(status));
+  }
+
+  void ExpectProvideInputData(const MediaCodecLoop::InputData& data) {
+    EXPECT_CALL(*client_, ProvideInputData()).WillOnce(Return(data));
+  }
+
+  MediaCodecLoop::InputData BigBuckBunny() {
+    MediaCodecLoop::InputData data;
+    data.memory = reinterpret_cast<const uint8_t*>("big buck bunny");
+    data.length = 14;
+    data.presentation_time = base::TimeDelta::FromSeconds(1);
+    return data;
+  }
+
+  struct OutputBuffer {
+    int index = 1;
+    size_t offset = 0;
+    size_t size = 1024;
+    base::TimeDelta pts = base::TimeDelta::FromSeconds(1);
+    bool eos = false;
+    bool key_frame = true;
+  };
+
+  struct EosOutputBuffer : public OutputBuffer {
+    EosOutputBuffer() { eos = true; }
+  };
+
+  void ExpectDequeueOutputBuffer(MediaCodecStatus status) {
+    EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+        .WillOnce(Return(status));
+  }
+
+  void ExpectDequeueOutputBuffer(const OutputBuffer& buffer) {
+    EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+        .WillOnce(DoAll(
+            SetArgPointee<1>(buffer.index), SetArgPointee<2>(buffer.offset),
+            SetArgPointee<3>(buffer.size), SetArgPointee<4>(buffer.pts),
+            SetArgPointee<5>(buffer.eos), SetArgPointee<6>(buffer.key_frame),
+            Return(MEDIA_CODEC_OK)));
+  }
+
+  void ExpectOnDecodedFrame(const OutputBuffer& buf) {
+    EXPECT_CALL(*client_,
+                OnDecodedFrame(
+                    Field(&MediaCodecLoop::OutputBuffer::index, Eq(buf.index))))
+        .Times(1)
+        .WillOnce(Return(true));
+  }
+
+  MockMediaCodecBridge& Codec() {
+    return *static_cast<MockMediaCodecBridge*>(codec_loop_->GetCodec());
+  }
 
  public:
   std::unique_ptr<MediaCodecLoop> codec_loop_;
   std::unique_ptr<MockMediaCodecLoopClient> client_;
+  // TODO: how is the lifecycle of |clock_| handled?  |task_runner_| can outlive
+  // us, since it's a refptr.
+  base::SimpleTestTickClock clock_;
+  scoped_refptr<FakeSingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaCodecLoopTest);
 };
 
 TEST_F(MediaCodecLoopTest, TestConstructionWithNullCodec) {
   std::unique_ptr<MediaCodecBridge> codec;
   EXPECT_CALL(*client_, OnCodecLoopError()).Times(1);
-  codec_loop_.reset(new MediaCodecLoop(client_.get(), std::move(codec)));
+  const int sdk_int = kLollipop;
+  codec_loop_.reset(
+      new MediaCodecLoop(sdk_int, client_.get(), std::move(codec)));
+  // Do not WaitUntilIdle() here, since that assumes that we have a codec.
 
   ASSERT_FALSE(codec_loop_->GetCodec());
 }
 
+TEST_F(MediaCodecLoopTest, TestConstructionWithCodec) {
+  ConstructCodecLoop();
+  ASSERT_EQ(codec_loop_->GetCodec(), &Codec());
+  WaitUntilIdle(ShouldBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestPendingWorkWithoutInput) {
+  ConstructCodecLoop();
+  // MCL should try ask if there is pending input, and try to dequeue output.
+  ExpectIsAnyInputPending(false);
+  EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+      .Times(1)
+      .WillOnce(Return(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER));
+  codec_loop_->DoPendingWork();
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestPendingWorkWithInput) {
+  ConstructCodecLoop();
+  // MCL should try ask if there is pending input, and try to dequeue both an
+  // output and input buffer.
+  ExpectIsAnyInputPending(true);
+  EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _)).Times(1);
+  EXPECT_CALL(Codec(), DequeueInputBuffer(_, _)).Times(1);
+  codec_loop_->DoPendingWork();
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestPendingWorkWithOutputBuffer) {
+  ConstructCodecLoop();
+  {
+    InSequence _s;
+
+    // MCL will first request input, then try to dequeue output.
+    ExpectIsAnyInputPending(false);
+    OutputBuffer buf;
+    ExpectDequeueOutputBuffer(buf);
+    ExpectOnDecodedFrame(buf);
+
+    // MCL will try again for another set of buffers before DoPendingWork()
+    // returns.  This is why we don't just leave them for WaitUntilIdle().
+    ExpectEmptyIOLoop();
+  }
+  codec_loop_->DoPendingWork();
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestQueueEos) {
+  // Test sending an EOS to MCL => MCB =dequeue output=> MCL .
+  ConstructCodecLoop();
+  {
+    InSequence _s;
+
+    ExpectIsAnyInputPending(true);
+    int input_buffer_index = 123;
+    ExpectDequeueInputBuffer(input_buffer_index);
+
+    MediaCodecLoop::InputData data;
+    data.is_eos = true;
+    ExpectProvideInputData(data);
+    EXPECT_CALL(Codec(), QueueEOS(input_buffer_index));
+    ExpectInputDataQueued(true);
+
+    // Now send the EOS back on the output queue.
+    EosOutputBuffer eos;
+    ExpectDequeueOutputBuffer(eos);
+    EXPECT_CALL(Codec(), ReleaseOutputBuffer(eos.index, false));
+    EXPECT_CALL(*client_, OnDecodedEos(_)).Times(1);
+
+    // See TestUnqueuedEos.
+    EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+        .Times(1)
+        .WillOnce(Return(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER));
+  }
+  codec_loop_->DoPendingWork();
+  // Don't WaitUntilIdle() here.  See TestUnqueuedEos.
+}
+
+TEST_F(MediaCodecLoopTest, TestQueueInputData) {
+  // Send a buffer full of data into MCL and make sure that it gets queued with
+  // MediaCodecBridge correctly.
+  ConstructCodecLoop();
+  {
+    InSequence _s;
+
+    ExpectIsAnyInputPending(true);
+    int input_buffer_index = 123;
+    ExpectDequeueInputBuffer(input_buffer_index);
+
+    MediaCodecLoop::InputData data = BigBuckBunny();
+    ExpectProvideInputData(data);
+
+    // MCL should send the buffer into MediaCodec and notify the client.
+    ExpectQueueInputBuffer(input_buffer_index, data);
+    ExpectInputDataQueued(true);
+
+    // MCL will try to dequeue an output buffer too.
+    EXPECT_CALL(Codec(), DequeueOutputBuffer(_, _, _, _, _, _, _))
+        .Times(1)
+        .WillOnce(Return(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER));
+
+    // DoPendingWork will try again.
+    ExpectEmptyIOLoop();
+  }
+  codec_loop_->DoPendingWork();
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestQueueInputDataFails) {
+  // Send a buffer full of data into MCL, but MediaCodecBridge fails to queue
+  // it successfully.
+  ConstructCodecLoop();
+  {
+    InSequence _s;
+
+    ExpectIsAnyInputPending(true);
+    int input_buffer_index = 123;
+    ExpectDequeueInputBuffer(input_buffer_index);
+
+    MediaCodecLoop::InputData data = BigBuckBunny();
+    ExpectProvideInputData(data);
+
+    // MCL should send the buffer into MediaCodec and notify the client.
+    ExpectQueueInputBuffer(input_buffer_index, data, MEDIA_CODEC_ERROR);
+    ExpectInputDataQueued(false);
+    EXPECT_CALL(*client_, OnCodecLoopError()).Times(1);
+  }
+  codec_loop_->DoPendingWork();
+  // MCL is now in the error state.
+}
+
+TEST_F(MediaCodecLoopTest, TestQueueInputDataTryAgain) {
+  // Signal that there is input pending, but don't provide an input buffer.
+  ConstructCodecLoop();
+  {
+    InSequence _s;
+
+    ExpectIsAnyInputPending(true);
+    ExpectDequeueInputBuffer(-1, MEDIA_CODEC_DEQUEUE_INPUT_AGAIN_LATER);
+    // MCL will try for output too.
+    ExpectDequeueOutputBuffer(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER);
+  }
+  codec_loop_->DoPendingWork();
+  // Note that the client might not be allowed to change from "input pending"
+  // to "no input pending" without actually being asked for input.  For now,
+  // MCL doesn't assume this.
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
+TEST_F(MediaCodecLoopTest, TestSeveralPendingIOBuffers) {
+  // Provide several input and output buffers to MCL.
+  ConstructCodecLoop();
+  int input_buffer_index = 123;
+  const int num_loops = 4;
+
+  InSequence _s;
+  for (int i = 0; i < num_loops; i++, input_buffer_index++) {
+    ExpectIsAnyInputPending(true);
+    ExpectDequeueInputBuffer(input_buffer_index);
+
+    MediaCodecLoop::InputData data = BigBuckBunny();
+    ExpectProvideInputData(data);
+
+    ExpectQueueInputBuffer(input_buffer_index, data);
+    ExpectInputDataQueued(true);
+
+    OutputBuffer buffer;
+    buffer.index = i;
+    buffer.size += i;
+    buffer.pts = base::TimeDelta::FromSeconds(i + 1);
+    ExpectDequeueOutputBuffer(buffer);
+    ExpectOnDecodedFrame(buffer);
+  }
+
+  ExpectEmptyIOLoop();
+
+  codec_loop_->DoPendingWork();
+}
+
+TEST_F(MediaCodecLoopTest, TestTryFlushOnJellyBeanMR2) {
+  // On JB MR2+ MCL should be willing to use MediaCodecBridge::Flush.
+  ConstructCodecLoop(kJellyBeanMR2);
+  EXPECT_CALL(Codec(), Flush()).Times(1).WillOnce(Return(MEDIA_CODEC_OK));
+  ASSERT_TRUE(codec_loop_->TryFlush());
+}
+
+TEST_F(MediaCodecLoopTest, TestTryFlushAfterJellyBeanMR2Fails) {
+  // On JB MR2+, MCL should be willing to use MediaCodecBridge::Flush.  Try
+  // that, but make Flush fail.
+  ConstructCodecLoop(kJellyBeanMR2);
+  EXPECT_CALL(Codec(), Flush()).Times(1).WillOnce(Return(MEDIA_CODEC_ERROR));
+  EXPECT_CALL(*client_, OnCodecLoopError()).Times(1);
+  ASSERT_FALSE(codec_loop_->TryFlush());
+}
+
+TEST_F(MediaCodecLoopTest, TestTryFlushOnJellyBeanMR1) {
+  // In JB MR1, MCL should not be willing to use MediaCodecBridge::Flush.
+  ConstructCodecLoop(kJellyBeanMR1);
+  ASSERT_FALSE(codec_loop_->TryFlush());
+}
+
+TEST_F(MediaCodecLoopTest, TestOnKeyAdded) {
+  ConstructCodecLoop();
+
+  int input_buffer_index = 123;
+  MediaCodecLoop::InputData data = BigBuckBunny();
+
+  // First provide input, but have MediaCodecBridge require a key.
+  {
+    InSequence _s;
+
+    // First DoPendingWork()
+    ExpectIsAnyInputPending(true);
+    ExpectDequeueInputBuffer(input_buffer_index);
+
+    ExpectProvideInputData(data);
+
+    // Notify MCL that it's missing the key.
+    ExpectQueueInputBuffer(input_buffer_index, data, MEDIA_CODEC_NO_KEY);
+
+    // MCL should now try for output buffers.
+    ExpectDequeueOutputBuffer(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER);
+
+    // MCL will try again, since trying to queue the input buffer is considered
+    // doing work, for some reason.  It would be nice to make this optional.
+    // Note that it should not ask us for more input, since it has not yet sent
+    // the buffer we just provided.
+    ExpectDequeueOutputBuffer(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER);
+  }
+  codec_loop_->DoPendingWork();
+
+  // Try again, to be sure that MCL doesn't request more input.  Note that this
+  // is also done in the above loop, but that one could be made optional.  This
+  // forces MCL to try again as part of an entirely new DoPendingWork cycle.
+  {
+    InSequence _s;
+    // MCL should only try for output buffers, since it's still waiting for a
+    // key to be added.
+    ExpectDequeueOutputBuffer(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER);
+  }
+  codec_loop_->DoPendingWork();
+
+  // When we add the key, MCL will DoPending work again.  This time, it should
+  // succeed since the key has been added.
+  {
+    InSequence _s;
+    // MCL should not retain the original pointer.
+    data.memory = nullptr;
+    ExpectQueueInputBuffer(input_buffer_index, data);
+    ExpectInputDataQueued(true);
+    ExpectDequeueOutputBuffer(MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER);
+
+    // MCL did work, so it will try again.
+    ExpectEmptyIOLoop();
+  }
+
+  codec_loop_->OnKeyAdded();
+  WaitUntilIdle(ShouldNotBeIdle);
+}
+
 }  // namespace media