Interpolate media time for mojo rendering pipeline.

media/base/pipeline_impl_unittest.cc

 // Copyright (c) 2012 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 "media/base/pipeline_impl.h"
 
 #include <stddef.h>
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 788 matching lines @@
   MockDemuxerStreamVector streams;
   streams.push_back(audio_stream());
   SetDemuxerExpectations(&streams);
   SetRendererExpectations();
   StartPipelineAndExpect(PIPELINE_OK);
   ExpectDemuxerStop();
   pipeline_->Stop();
   base::RunLoop().RunUntilIdle();
 }
 
+TEST_F(PipelineImplTest, GetMediaTime) {
+  CreateAudioStream();
+  MockDemuxerStreamVector streams;
+  streams.push_back(audio_stream());
+  SetDemuxerExpectations(&streams);
+  SetRendererExpectations();
+  StartPipelineAndExpect(PIPELINE_OK);
+
+  // Pipeline should report the same media time returned by the renderer.
+  base::TimeDelta kMediaTime = base::TimeDelta::FromSeconds(2);
+  EXPECT_CALL(*renderer_, GetMediaTime()).WillRepeatedly(Return(kMediaTime));
+  EXPECT_EQ(kMediaTime, pipeline_->GetMediaTime());
+
+  // Media time should not go backwards even if the renderer returns an
+  // errorneous value. PipelineImpl should clamp it to last reported value.
+  EXPECT_CALL(*renderer_, GetMediaTime())
+      .WillRepeatedly(Return(base::TimeDelta::FromSeconds(1)));
+  EXPECT_EQ(kMediaTime, pipeline_->GetMediaTime());
+}
+
 class PipelineTeardownTest : public PipelineImplTest {
  public:
   enum TeardownState {
     kInitDemuxer,
     kInitRenderer,
     kFlushing,
     kSeeking,
     kPlaying,
     kSuspending,
     kSuspended,
@@ skipping 252 matching lines @@
 INSTANTIATE_TEARDOWN_TEST(Error, Seeking);
 INSTANTIATE_TEARDOWN_TEST(Error, Playing);
 INSTANTIATE_TEARDOWN_TEST(Error, Suspending);
 INSTANTIATE_TEARDOWN_TEST(Error, Suspended);
 INSTANTIATE_TEARDOWN_TEST(Error, Resuming);
 
 INSTANTIATE_TEARDOWN_TEST(ErrorAndStop, Playing);
 INSTANTIATE_TEARDOWN_TEST(ErrorAndStop, Suspended);
 
 }  // namespace media