MediaCodecPlayer implementation (stage 4 - preroll)

media/base/android/media_codec_decoder_unittest.cc

 // Copyright 2015 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/bind.h"
 #include "base/logging.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/timer/timer.h"
 #include "media/base/android/media_codec_audio_decoder.h"
 #include "media/base/android/media_codec_bridge.h"
@@ skipping 475 matching lines @@
   EXPECT_TRUE(decoder_->Start(base::TimeDelta::FromMilliseconds(0)));
 
   EXPECT_TRUE(WaitForCondition(
       base::Bind(&MediaCodecDecoderTest::is_stopped, base::Unretained(this)),
       timeout));
 
   EXPECT_TRUE(decoder_->IsStopped());
   EXPECT_TRUE(decoder_->IsCompleted());
 
   // Last buffered timestamp should be no less than PTS.
-  EXPECT_EQ(22, pts_stat_.num_values());
+  // The number of hits in pts_stat_ depends on the preroll implementation.
+  // We might not report the time for the first buffer after preroll that
+  // is written to the audio track. pts_stat_.num_values() is either 21 or 22.
+  EXPECT_LE(21, pts_stat_.num_values());
   EXPECT_LE(data_factory_->last_pts(), pts_stat_.max());
 
   DVLOG(0) << "AudioPlayTillCompletion stopping";
 }
 
 TEST_F(MediaCodecDecoderTest, VideoPlayTillCompletion) {
   SKIP_TEST_IF_MEDIA_CODEC_BRIDGE_IS_NOT_AVAILABLE();
 
   CreateVideoDecoder();
 
@@ skipping 140 matching lines @@
   decoder_->RequestToStop();
 
   EXPECT_TRUE(WaitForCondition(
       base::Bind(&MediaCodecDecoderTest::is_stopped, base::Unretained(this))));
 
   EXPECT_TRUE(decoder_->IsStopped());
   EXPECT_FALSE(decoder_->IsCompleted());
 }
 
 }  // namespace media