1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
// 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_usb.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/check_op.h"
#include "base/strings/stringprintf.h"
#include "media/midi/midi_service.h"
#include "media/midi/task_service.h"
#include "media/midi/usb_midi_descriptor_parser.h"
namespace midi {
using mojom::PortState;
using mojom::Result;
MidiManagerUsb::MidiManagerUsb(MidiService* service,
std::unique_ptr<UsbMidiDevice::Factory> factory)
: MidiManager(service), device_factory_(std::move(factory)) {}
MidiManagerUsb::~MidiManagerUsb() {
if (!service()->task_service()->UnbindInstance())
return;
// Finalization steps should be implemented after the UnbindInstance() call
// above, if we need.
}
void MidiManagerUsb::StartInitialization() {
if (!service()->task_service()->BindInstance())
return CompleteInitialization(Result::INITIALIZATION_ERROR);
Initialize();
}
void MidiManagerUsb::Initialize() {
// This is safe because EnumerateDevices cancels the operation on destruction.
device_factory_->EnumerateDevices(
this, base::BindOnce(&MidiManagerUsb::OnEnumerateDevicesDone,
base::Unretained(this)));
}
void MidiManagerUsb::DispatchSendMidiData(MidiManagerClient* client,
uint32_t port_index,
const std::vector<uint8_t>& data,
base::TimeTicks timestamp) {
if (port_index >= output_streams_.size()) {
// |port_index| is provided by a renderer so we can't believe that it is
// in the valid range.
return;
}
base::TimeDelta delay = MidiService::TimestampToTimeDeltaDelay(timestamp);
// output_streams_[port_index] is alive unless MidiManagerUsb is deleted.
service()->task_service()->PostBoundDelayedTask(
TaskService::kDefaultRunnerId,
base::BindOnce(&UsbMidiOutputStream::Send,
base::Unretained(output_streams_[port_index].get()), data),
delay);
service()->task_service()->PostBoundDelayedTask(
TaskService::kDefaultRunnerId,
base::BindOnce(&MidiManager::AccumulateMidiBytesSent,
base::Unretained(this), client, data.size()),
delay);
}
void MidiManagerUsb::ReceiveUsbMidiData(UsbMidiDevice* device,
int endpoint_number,
const uint8_t* data,
size_t size,
base::TimeTicks time) {
if (!input_stream_)
return;
input_stream_->OnReceivedData(device,
endpoint_number,
data,
size,
time);
}
void MidiManagerUsb::OnDeviceAttached(std::unique_ptr<UsbMidiDevice> device) {
int device_id = static_cast<int>(devices_.size());
devices_.push_back(std::move(device));
AddPorts(devices_.back().get(), device_id);
}
void MidiManagerUsb::OnDeviceDetached(size_t index) {
if (index >= devices_.size()) {
return;
}
UsbMidiDevice* device = devices_[index].get();
for (size_t i = 0; i < output_streams_.size(); ++i) {
if (output_streams_[i]->jack().device == device) {
SetOutputPortState(static_cast<uint32_t>(i), PortState::DISCONNECTED);
}
}
const std::vector<UsbMidiJack>& input_jacks = input_stream_->jacks();
for (size_t i = 0; i < input_jacks.size(); ++i) {
if (input_jacks[i].device == device) {
SetInputPortState(static_cast<uint32_t>(i), PortState::DISCONNECTED);
}
}
}
void MidiManagerUsb::OnReceivedData(size_t jack_index,
const uint8_t* data,
size_t size,
base::TimeTicks time) {
ReceiveMidiData(static_cast<uint32_t>(jack_index), data, size, time);
}
void MidiManagerUsb::OnEnumerateDevicesDone(bool result,
UsbMidiDevice::Devices* devices) {
if (result) {
input_stream_ = std::make_unique<UsbMidiInputStream>(this);
devices->swap(devices_);
for (size_t i = 0; i < devices_.size(); ++i) {
if (!AddPorts(devices_[i].get(), static_cast<int>(i))) {
result = false;
break;
}
}
}
service()->task_service()->PostBoundTask(
TaskService::kDefaultRunnerId,
base::BindOnce(&MidiManager::CompleteInitialization,
base::Unretained(this),
result ? Result::OK : Result::INITIALIZATION_ERROR));
}
bool MidiManagerUsb::AddPorts(UsbMidiDevice* device, int device_id) {
UsbMidiDescriptorParser parser;
std::vector<uint8_t> descriptor = device->GetDescriptors();
const uint8_t* data = descriptor.size() > 0 ? &descriptor[0] : NULL;
std::vector<UsbMidiJack> jacks;
bool parse_result = parser.Parse(device,
data,
descriptor.size(),
&jacks);
if (!parse_result)
return false;
std::string manufacturer(device->GetManufacturer());
std::string product_name(device->GetProductName());
std::string version(device->GetDeviceVersion());
for (size_t j = 0; j < jacks.size(); ++j) {
// 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.
std::string id(
base::StringPrintf("usb:port-%d-%ld", device_id, static_cast<long>(j)));
if (jacks[j].direction() == UsbMidiJack::DIRECTION_OUT) {
output_streams_.push_back(
std::make_unique<UsbMidiOutputStream>(jacks[j]));
AddOutputPort(mojom::PortInfo(id, manufacturer, product_name, version,
PortState::OPENED));
} else {
DCHECK_EQ(jacks[j].direction(), UsbMidiJack::DIRECTION_IN);
input_stream_->Add(jacks[j]);
AddInputPort(mojom::PortInfo(id, manufacturer, product_name, version,
PortState::OPENED));
}
}
return true;
}
} // namespace midi
|
