Revert 207992: This looks like a reland of r207983, which was reverted in

trunk/src/media/midi/midi_manager_mac.cc

Index: trunk/src/media/midi/midi_manager_mac.cc
===================================================================
--- trunk/src/media/midi/midi_manager_mac.cc	(revision 207994)
+++ trunk/src/media/midi/midi_manager_mac.cc	(working copy)
@@ -1,205 +0,0 @@
-// 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_mac.h"
-
-#include <iostream>
-#include <string>
-
-#include "base/debug/trace_event.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/sys_string_conversions.h"
-#include <CoreAudio/HostTime.h>
-
-using base::IntToString;
-using base::SysCFStringRefToUTF8;
-using std::string;
-
-namespace media {
-
-MIDIManager* MIDIManager::Create() {
-  return new MIDIManagerMac();
-}
-
-MIDIManagerMac::MIDIManagerMac()
-    : midi_client_(NULL),
-      coremidi_input_(NULL),
-      coremidi_output_(NULL),
-      packet_list_(NULL),
-      midi_packet_(NULL) {
-}
-
-bool MIDIManagerMac::Initialize() {
-  TRACE_EVENT0("midi", "MIDIManagerMac::Initialize");
-
-  // CoreMIDI registration.
-  midi_client_ = NULL;
-  OSStatus result = MIDIClientCreate(
-      CFSTR("Google Chrome"),
-      NULL,
-      NULL,
-      &midi_client_);
-
-  if (result != noErr)
-    return false;
-
-  coremidi_input_ = NULL;
-
-  // Create input and output port.
-  result = MIDIInputPortCreate(
-      midi_client_,
-      CFSTR("MIDI Input"),
-      ReadMidiDispatch,
-      this,
-      &coremidi_input_);
-  if (result != noErr)
-    return false;
-
-  result = MIDIOutputPortCreate(
-      midi_client_,
-      CFSTR("MIDI Output"),
-      &coremidi_output_);
-  if (result != noErr)
-    return false;
-
-  int destination_count = MIDIGetNumberOfDestinations();
-  destinations_.reserve(destination_count);
-
-  for (int i = 0; i < destination_count ; i++) {
-    MIDIEndpointRef destination = MIDIGetDestination(i);
-
-    // Keep track of all destinations (known as outputs by the Web MIDI API).
-    // Cache to avoid any possible overhead in calling MIDIGetDestination().
-    destinations_[i] = destination;
-
-    MIDIPortInfo info = GetPortInfoFromEndpoint(destination);
-    AddOutputPort(info);
-  }
-
-  // Open connections from all sources.
-  int source_count = MIDIGetNumberOfSources();
-
-  for (int i = 0; i < source_count; ++i)  {
-    // Receive from all sources.
-    MIDIEndpointRef src = MIDIGetSource(i);
-    MIDIPortConnectSource(coremidi_input_, src, src);
-
-    // Keep track of all sources (known as inputs in Web MIDI API terminology).
-    source_map_[src] = i;
-
-    MIDIPortInfo info = GetPortInfoFromEndpoint(src);
-    AddInputPort(info);
-  }
-
-  // TODO(crogers): Fix the memory management here!
-  packet_list_ = reinterpret_cast<MIDIPacketList*>(midi_buffer_);
-  midi_packet_ = MIDIPacketListInit(packet_list_);
-
-  return true;
-}
-
-MIDIManagerMac::~MIDIManagerMac() {
-  if (coremidi_input_)
-    MIDIPortDispose(coremidi_input_);
-  if (coremidi_output_)
-    MIDIPortDispose(coremidi_output_);
-}
-
-void MIDIManagerMac::ReadMidiDispatch(const MIDIPacketList* packet_list,
-                                      void* read_proc_refcon,
-                                      void* src_conn_refcon) {
-  MIDIManagerMac* manager = static_cast<MIDIManagerMac*>(read_proc_refcon);
-  MIDIEndpointRef source = static_cast<MIDIEndpointRef>(src_conn_refcon);
-
-  // Dispatch to class method.
-  manager->ReadMidi(source, packet_list);
-}
-
-void MIDIManagerMac::ReadMidi(MIDIEndpointRef source,
-                              const MIDIPacketList* packet_list) {
-  // Lookup the port index based on the source.
-  SourceMap::iterator j = source_map_.find(source);
-  if (j == source_map_.end())
-    return;
-  int port_index = source_map_[source];
-
-  // Go through each packet and process separately.
-  for(size_t i = 0; i < packet_list->numPackets; i++) {
-    // Each packet contains MIDI data for one or more messages (like note-on).
-    const MIDIPacket &packet = packet_list->packet[i];
-    double timestamp_seconds = MIDITimeStampToSeconds(packet.timeStamp);
-
-    ReceiveMIDIData(
-        port_index,
-        packet.data,
-        packet.length,
-        timestamp_seconds);
-  }
-}
-
-void MIDIManagerMac::SendMIDIData(int port_index,
-                                  const uint8* data,
-                                  size_t length,
-                                  double timestamp) {
-  // TODO(crogers): Filter out sysex.
-
-  MIDITimeStamp coremidi_timestamp = SecondsToMIDITimeStamp(timestamp);
-
-  midi_packet_ = MIDIPacketListAdd(
-      packet_list_,
-      kMaxPacketListSize,
-      midi_packet_,
-      coremidi_timestamp,
-      length,
-      data);
-
-  // Lookup the destination based on the port index.
-  // TODO(crogers): re-factor |port_index| to use unsigned
-  // to avoid the need for this check.
-  if (port_index < 0 ||
-      static_cast<size_t>(port_index) >= destinations_.size())
-    return;
-
-  MIDIEndpointRef destination = destinations_[port_index];
-
-  MIDISend(coremidi_output_, destination, packet_list_);
-
-  // Re-initialize for next time.
-  midi_packet_ = MIDIPacketListInit(packet_list_);
-}
-
-MIDIPortInfo MIDIManagerMac::GetPortInfoFromEndpoint(
-    MIDIEndpointRef endpoint) {
-  SInt32 id_number = 0;
-  MIDIObjectGetIntegerProperty(endpoint, kMIDIPropertyUniqueID, &id_number);
-  string id = IntToString(id_number);
-
-  CFStringRef manufacturer_ref = NULL;
-  MIDIObjectGetStringProperty(
-      endpoint, kMIDIPropertyManufacturer, &manufacturer_ref);
-  string manufacturer = SysCFStringRefToUTF8(manufacturer_ref);
-
-  CFStringRef name_ref = NULL;
-  MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &name_ref);
-  string name = SysCFStringRefToUTF8(name_ref);
-
-  SInt32 version_number = 0;
-  MIDIObjectGetIntegerProperty(
-      endpoint, kMIDIPropertyDriverVersion, &version_number);
-  string version = IntToString(version_number);
-
-  return MIDIPortInfo(id, manufacturer, name, version);
-}
-
-double MIDIManagerMac::MIDITimeStampToSeconds(MIDITimeStamp timestamp) {
-  UInt64 nanoseconds = AudioConvertHostTimeToNanos(timestamp);
-  return static_cast<double>(nanoseconds) / 1.0e9;
-}
-
-MIDITimeStamp MIDIManagerMac::SecondsToMIDITimeStamp(double seconds) {
-  UInt64 nanos = UInt64(seconds * 1.0e9);
-  return AudioConvertNanosToHostTime(nanos);
-}
-
-}  // namespace media