midi_manager.cc

// Copyright (c) 2013 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_manager.h"

namespace media {

#if !defined(OS_MACOSX)
// TODO(crogers): implement MIDIManager for other platforms.
MIDIManager* MIDIManager::Create() {
  return NULL;
}
#endif

MIDIManager::MIDIManager()
    : initialized_(false) {
}

MIDIManager::~MIDIManager() {}

bool MIDIManager::RequestAccess(MIDIManagerClient* client, int access) {
  // TODO(crogers): determine if user prompt is necessary here.
  // For now, simply don't allow sysex.
  if (access != kNoSystemExclusive)
    return false;

  // Lazily initialize the MIDI back-end.
  if (!initialized_)
    initialized_ = Initialize();

  if (initialized_) {
    base::AutoLock auto_lock(clients_lock_);
    clients_.insert(client);
  }

  return initialized_;
}

void MIDIManager::ReleaseAccess(MIDIManagerClient* client) {
  base::AutoLock auto_lock(clients_lock_);
  ClientList::iterator i = clients_.find(client);
  if (i != clients_.end())
    clients_.erase(i);
}

void MIDIManager::AddInputPort(const MIDIPortInfo& info) {
  input_ports_.push_back(info);
}

void MIDIManager::AddOutputPort(const MIDIPortInfo& info) {
  output_ports_.push_back(info);
}

void MIDIManager::ReceiveMIDIData(
    int port_index,
    const uint8* data,
    size_t length,
    double timestamp) {
  base::AutoLock auto_lock(clients_lock_);

  // TODO(crogers): Filter out sysex.
  for (ClientList::iterator i = clients_.begin(); i != clients_.end(); ++i)
    (*i)->ReceiveMIDIData(port_index, data, length, timestamp);
};

}  // namespace media