| // 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 "media/midi/midi_scheduler.h" |
| |
| #include <algorithm> |
| |
| #include "base/bind.h" |
| #include "base/location.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "base/time/time.h" |
| #include "media/midi/midi_manager.h" |
| |
| namespace media { |
| namespace midi { |
| |
| MidiScheduler::MidiScheduler(MidiManager* manager) |
| : manager_(manager), |
| weak_factory_(this) { |
| } |
| |
| MidiScheduler::~MidiScheduler() { |
| } |
| |
| // TODO(crbug.com/467442): Use CancelableTaskTracker once it supports |
| // DelayedTask. |
| void MidiScheduler::PostSendDataTask(MidiManagerClient* client, |
| size_t length, |
| double timestamp, |
| const base::Closure& closure) { |
| DCHECK(client); |
| |
| const base::Closure& weak_closure = base::Bind( |
| &MidiScheduler::InvokeClosure, |
| weak_factory_.GetWeakPtr(), |
| client, |
| length, |
| closure); |
| |
| base::TimeDelta delay; |
| if (timestamp != 0.0) { |
| base::TimeTicks time_to_send = |
| base::TimeTicks() + base::TimeDelta::FromMicroseconds( |
| timestamp * base::Time::kMicrosecondsPerSecond); |
| delay = std::max(time_to_send - base::TimeTicks::Now(), base::TimeDelta()); |
| } |
| base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(FROM_HERE, weak_closure, |
| delay); |
| } |
| |
| void MidiScheduler::InvokeClosure(MidiManagerClient* client, |
| size_t length, |
| const base::Closure& closure) { |
| closure.Run(); |
| manager_->AccumulateMidiBytesSent(client, length); |
| } |
| |
| } // namespace midi |
| } // namespace media |