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// 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 "base/bind.h"
#include "base/message_loop/message_loop.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::MessageLoop::current()->task_runner()->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
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