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Unified Diff: trunk/src/media/midi/midi_manager_mac.cc

Issue 17176031: Revert 207992: This looks like a reland of r207983, which was reverted in (Closed) Base URL: svn://svn.chromium.org/chrome/
Patch Set: Created 7 years, 6 months ago
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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
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