Convert media constants to constexpr.

chromecast/media/cma/base/demuxer_stream_adapter.cc

 // Copyright 2014 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 "chromecast/media/cma/base/demuxer_stream_adapter.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/single_thread_task_runner.h"
 #include "chromecast/media/cma/base/balanced_media_task_runner_factory.h"
@@ skipping 79 matching lines @@
   weak_factory_.InvalidateWeakPtrs();
   weak_this_ = weak_factory_.GetWeakPtr();
 
   CMALOG(kLogControl) << "Flush done";
   flush_cb.Run();
 }
 
 void DemuxerStreamAdapter::ResetMediaTaskRunner() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  max_pts_ = ::media::kNoTimestamp();
+  max_pts_ = ::media::kNoTimestamp;
   if (media_task_runner_factory_.get()) {
     media_task_runner_ =
         media_task_runner_factory_->CreateMediaTaskRunner(task_runner_);
   }
 }
 
 void DemuxerStreamAdapter::RequestBuffer(const ReadCB& read_cb) {
   DCHECK(thread_checker_.CalledOnValidThread());
   is_pending_demuxer_read_ = true;
   demuxer_stream_->Read(::media::BindToCurrentLoop(
@@ skipping 35 matching lines @@
   DCHECK_EQ(status, ::media::DemuxerStream::kOk);
 
   if (input->end_of_stream()) {
     // This stream has ended, its media time will stop increasing, but there
     // might be other streams that are still playing. Remove the task runner of
     // this stream to ensure other streams are not blocked waiting for this one.
     ResetMediaTaskRunner();
   }
 
   // Updates the timestamp used for task scheduling.
-  if (!input->end_of_stream() &&
-      input->timestamp() != ::media::kNoTimestamp() &&
-      (max_pts_ == ::media::kNoTimestamp() || input->timestamp() > max_pts_)) {
+  if (!input->end_of_stream() && input->timestamp() != ::media::kNoTimestamp &&
+      (max_pts_ == ::media::kNoTimestamp || input->timestamp() > max_pts_)) {
     max_pts_ = input->timestamp();
   }
 
   // Provides the buffer as well as possibly valid audio and video configs.
   is_pending_read_ = false;
   scoped_refptr<DecoderBufferBase> buffer(new DecoderBufferAdapter(input));
   read_cb.Run(buffer, audio_config_, video_config_);
 
   // Back to the default audio/video config:
   // an invalid audio/video config means there is no config update.
   if (audio_config_.IsValidConfig())
     audio_config_ = ::media::AudioDecoderConfig();
   if (video_config_.IsValidConfig())
     video_config_ = ::media::VideoDecoderConfig();
 }
 
 }  // namespace media
 }  // namespace chromecast