blob: 8ba58b735fae3a7194349f40cbb8d679171a9282 [file] [log] [blame]
// Copyright 2014 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_android.h"
#include "base/android/build_info.h"
#include "base/android/context_utils.h"
#include "base/feature_list.h"
#include "base/memory/ptr_util.h"
#include "base/metrics/field_trial_params.h"
#include "base/strings/stringprintf.h"
#include "jni/MidiManagerAndroid_jni.h"
#include "media/midi/midi_device_android.h"
#include "media/midi/midi_manager_usb.h"
#include "media/midi/midi_output_port_android.h"
#include "media/midi/midi_switches.h"
#include "media/midi/usb_midi_device_factory_android.h"
using base::android::JavaParamRef;
using midi::mojom::PortState;
using midi::mojom::Result;
namespace midi {
namespace {
// MidiManagerAndroid should be enabled only when the feature is enabled via
// chrome://flags on M+, or enabled by server configurations under specified
// Android versions, M+ or N+.
bool IsMidiManagerAndroidEnabled() {
// The feature is not enabled by chrome://flags or field trials.
if (!base::FeatureList::IsEnabled(features::kMidiManagerAndroid))
return false;
auto sdk_version = base::android::BuildInfo::GetInstance()->sdk_int();
// If the feature is enabled, check the RequredAndroidVersion param. If the
// param is provided and the value is "NOUGAT", use MidiManagerAndroid on N
// and later versions. This string comparison should not match when users
// enable the feature via chrome://flags.
if (base::GetFieldTrialParamValueByFeature(features::kMidiManagerAndroid,
"RequiredAndroidVersion") ==
return sdk_version >= base::android::SDK_VERSION_NOUGAT;
// Otherwise, allow to use MidiManagerAndroid on M and later versions.
return sdk_version >= base::android::SDK_VERSION_MARSHMALLOW;
} // namespace
MidiManager* MidiManager::Create(MidiService* service) {
if (IsMidiManagerAndroidEnabled())
return new MidiManagerAndroid(service);
return new MidiManagerUsb(service,
MidiManagerAndroid::MidiManagerAndroid(MidiService* service)
: MidiManager(service) {}
MidiManagerAndroid::~MidiManagerAndroid() {
base::AutoLock auto_lock(scheduler_lock_);
void MidiManagerAndroid::StartInitialization() {
JNIEnv* env = base::android::AttachCurrentThread();
uintptr_t pointer = reinterpret_cast<uintptr_t>(this);
env, base::android::GetApplicationContext(), pointer));
base::AutoLock auto_lock(scheduler_lock_);
scheduler_.reset(new MidiScheduler(this));
Java_MidiManagerAndroid_initialize(env, raw_manager_);
void MidiManagerAndroid::Finalize() {
// Destruct MidiScheduler on Chrome_IOThread.
base::AutoLock auto_lock(scheduler_lock_);
void MidiManagerAndroid::DispatchSendMidiData(MidiManagerClient* client,
uint32_t port_index,
const std::vector<uint8_t>& data,
double timestamp) {
if (port_index >= all_output_ports_.size()) {
// |port_index| is provided by a renderer so we can't believe that it is
// in the valid range.
DCHECK_EQ(output_ports().size(), all_output_ports_.size());
if (output_ports()[port_index].state == PortState::CONNECTED) {
// We treat send call as implicit open.
// TODO(yhirano): Implement explicit open operation from the renderer.
if (all_output_ports_[port_index]->Open()) {
SetOutputPortState(port_index, PortState::OPENED);
} else {
// We cannot open the port. It's useless to send data to such a port.
// output_streams_[port_index] is alive unless MidiManagerUsb is deleted.
// The task posted to the MidiScheduler will be disposed safely on deleting
// the scheduler.
client, data.size(), timestamp,
base::Unretained(all_output_ports_[port_index]), data));
void MidiManagerAndroid::OnReceivedData(MidiInputPortAndroid* port,
const uint8_t* data,
size_t size,
base::TimeTicks timestamp) {
const auto i = input_port_to_index_.find(port);
DCHECK(input_port_to_index_.end() != i);
ReceiveMidiData(i->second, data, size, timestamp);
void MidiManagerAndroid::OnInitialized(
JNIEnv* env,
const JavaParamRef<jobject>& caller,
const JavaParamRef<jobjectArray>& devices) {
jsize length = env->GetArrayLength(devices);
for (jsize i = 0; i < length; ++i) {
jobject raw_device = env->GetObjectArrayElement(devices, i);
AddDevice(base::MakeUnique<MidiDeviceAndroid>(env, raw_device, this));
void MidiManagerAndroid::OnInitializationFailed(
JNIEnv* env,
const JavaParamRef<jobject>& caller) {
void MidiManagerAndroid::OnAttached(JNIEnv* env,
const JavaParamRef<jobject>& caller,
const JavaParamRef<jobject>& raw_device) {
AddDevice(base::MakeUnique<MidiDeviceAndroid>(env, raw_device, this));
void MidiManagerAndroid::OnDetached(JNIEnv* env,
const JavaParamRef<jobject>& caller,
const JavaParamRef<jobject>& raw_device) {
for (auto* device : devices_) {
if (device->HasRawDevice(env, raw_device)) {
for (auto* port : device->input_ports()) {
DCHECK(input_port_to_index_.end() != input_port_to_index_.find(port));
size_t index = input_port_to_index_[port];
SetInputPortState(index, PortState::DISCONNECTED);
for (auto* port : device->output_ports()) {
DCHECK(output_port_to_index_.end() != output_port_to_index_.find(port));
size_t index = output_port_to_index_[port];
SetOutputPortState(index, PortState::DISCONNECTED);
void MidiManagerAndroid::AddDevice(std::unique_ptr<MidiDeviceAndroid> device) {
for (auto* port : device->input_ports()) {
// We implicitly open input ports here, because there are no signal
// from the renderer when to open.
// TODO(yhirano): Implement open operation in Blink.
PortState state = port->Open() ? PortState::OPENED : PortState::CONNECTED;
const size_t index = all_input_ports_.size();
// Port ID must be unique in a MIDI manager. This ID setting is
// sufficiently unique although there is no user-friendly meaning.
// TODO(yhirano): Use a hashed string as ID.
const std::string id(
base::StringPrintf("native:port-in-%ld", static_cast<long>(index)));
input_port_to_index_.insert(std::make_pair(port, index));
AddInputPort(MidiPortInfo(id, device->GetManufacturer(),
device->GetDeviceVersion(), state));
for (auto* port : device->output_ports()) {
const size_t index = all_output_ports_.size();
// Port ID must be unique in a MIDI manager. This ID setting is
// sufficiently unique although there is no user-friendly meaning.
// TODO(yhirano): Use a hashed string as ID.
const std::string id(
base::StringPrintf("native:port-out-%ld", static_cast<long>(index)));
output_port_to_index_.insert(std::make_pair(port, index));
MidiPortInfo(id, device->GetManufacturer(), device->GetProductName(),
device->GetDeviceVersion(), PortState::CONNECTED));
bool MidiManagerAndroid::Register(JNIEnv* env) {
return RegisterNativesImpl(env);
} // namespace midi