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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "content/renderer/media/midi_message_filter.h" | 5 #include "content/renderer/media/midi_message_filter.h" |
6 | 6 |
7 #include <algorithm> | |
8 | |
7 #include "base/bind.h" | 9 #include "base/bind.h" |
8 #include "base/debug/trace_event.h" | 10 #include "base/debug/trace_event.h" |
9 #include "base/message_loop/message_loop_proxy.h" | 11 #include "base/message_loop/message_loop_proxy.h" |
10 #include "base/strings/utf_string_conversions.h" | 12 #include "base/strings/utf_string_conversions.h" |
11 #include "content/common/media/midi_messages.h" | 13 #include "content/common/media/midi_messages.h" |
12 #include "content/renderer/render_thread_impl.h" | 14 #include "content/renderer/render_thread_impl.h" |
13 #include "ipc/ipc_logging.h" | 15 #include "ipc/ipc_logging.h" |
14 | 16 |
15 using media::MidiPortInfoList; | 17 using media::MidiPortInfoList; |
16 using base::AutoLock; | 18 using base::AutoLock; |
17 | 19 |
18 // The maximum number of bytes which we're allowed to send to the browser | 20 // The maximum number of bytes which we're allowed to send to the browser |
19 // before getting acknowledgement back from the browser that they've been | 21 // before getting acknowledgement back from the browser that they've been |
20 // successfully sent. | 22 // successfully sent. |
21 static const size_t kMaxUnacknowledgedBytesSent = 10 * 1024 * 1024; // 10 MB. | 23 static const size_t kMaxUnacknowledgedBytesSent = 10 * 1024 * 1024; // 10 MB. |
22 | 24 |
23 namespace content { | 25 namespace content { |
24 | 26 |
25 MidiMessageFilter::MidiMessageFilter( | 27 MidiMessageFilter::MidiMessageFilter( |
26 const scoped_refptr<base::MessageLoopProxy>& io_message_loop) | 28 const scoped_refptr<base::MessageLoopProxy>& io_message_loop) |
27 : sender_(NULL), | 29 : sender_(NULL), |
28 io_message_loop_(io_message_loop), | 30 io_message_loop_(io_message_loop), |
29 main_message_loop_(base::MessageLoopProxy::current()), | 31 main_message_loop_(base::MessageLoopProxy::current()), |
30 next_available_id_(0), | 32 session_result_(media::MIDI_NOT_INITIALIZED), |
31 unacknowledged_bytes_sent_(0) { | 33 unacknowledged_bytes_sent_(0) { |
32 } | 34 } |
33 | 35 |
34 MidiMessageFilter::~MidiMessageFilter() {} | 36 MidiMessageFilter::~MidiMessageFilter() {} |
35 | 37 |
38 void MidiMessageFilter::AddClient(blink::WebMIDIAccessorClient* client) { | |
39 TRACE_EVENT0("midi", "MidiMessageFilter::AddClient"); | |
40 base::AutoLock auto_lock(lock_); | |
41 if (session_result_ != media::MIDI_NOT_INITIALIZED) { | |
42 main_message_loop_->PostTask(FROM_HERE, | |
43 base::Bind(&MidiMessageFilter::HandleClientAdded, this, client)); | |
44 } else if (!clients_waiting_session_queue_.empty()) { | |
45 clients_waiting_session_queue_.push_back(client); | |
46 } else { | |
47 clients_waiting_session_queue_.push_back(client); | |
48 io_message_loop_->PostTask(FROM_HERE, | |
49 base::Bind(&MidiMessageFilter::StartSessionOnIOThread, this)); | |
50 } | |
51 } | |
52 | |
53 void MidiMessageFilter::RemoveClient(blink::WebMIDIAccessorClient* client) { | |
54 base::AutoLock auto_lock(lock_); | |
55 clients_.erase(client); | |
56 ClientsQueue::iterator it = std::find(clients_waiting_session_queue_.begin(), | |
57 clients_waiting_session_queue_.end(), | |
58 client); | |
59 if (it != clients_waiting_session_queue_.end()) | |
60 clients_waiting_session_queue_.erase(it); | |
61 if (clients_.empty() && clients_waiting_session_queue_.empty()) { | |
62 session_result_ = media::MIDI_NOT_INITIALIZED; | |
63 io_message_loop_->PostTask(FROM_HERE, | |
64 base::Bind(&MidiMessageFilter::EndSessionOnIOThread, this)); | |
65 } | |
66 } | |
67 | |
68 void MidiMessageFilter::SendMidiData(uint32 port, | |
scherkus (not reviewing)
2014/10/20 18:05:48
which thread is this typically called on?
it seem
Takashi Toyoshima
2014/10/21 01:24:07
This function should be called from main thread.
scherkus (not reviewing)
2014/10/21 17:06:17
Sounds good.
I'm not guaranteeing it'll work but
| |
69 const uint8* data, | |
70 size_t length, | |
71 double timestamp) { | |
72 if (length > kMaxUnacknowledgedBytesSent) { | |
73 // TODO(toyoshim): buffer up the data to send at a later time. | |
74 // For now we're just dropping these bytes on the floor. | |
75 return; | |
76 } | |
77 | |
78 std::vector<uint8> v(data, data + length); | |
79 io_message_loop_->PostTask(FROM_HERE, | |
80 base::Bind(&MidiMessageFilter::SendMidiDataOnIOThread, this, | |
81 port, v, timestamp)); | |
82 } | |
83 | |
84 void MidiMessageFilter::StartSessionOnIOThread() { | |
85 TRACE_EVENT0("midi", "MidiMessageFilter::StartSessionOnIOThread"); | |
86 DCHECK(io_message_loop_->BelongsToCurrentThread()); | |
87 Send(new MidiHostMsg_StartSession()); | |
88 } | |
89 | |
90 void MidiMessageFilter::SendMidiDataOnIOThread(uint32 port, | |
91 const std::vector<uint8>& data, | |
92 double timestamp) { | |
93 DCHECK(io_message_loop_->BelongsToCurrentThread()); | |
94 size_t n = data.size(); | |
95 if (n > kMaxUnacknowledgedBytesSent || | |
96 unacknowledged_bytes_sent_ > kMaxUnacknowledgedBytesSent || | |
97 n + unacknowledged_bytes_sent_ > kMaxUnacknowledgedBytesSent) { | |
98 // TODO(toyoshim): buffer up the data to send at a later time. | |
99 // For now we're just dropping these bytes on the floor. | |
100 return; | |
101 } | |
102 | |
103 unacknowledged_bytes_sent_ += n; | |
104 | |
105 // Send to the browser. | |
106 Send(new MidiHostMsg_SendData(port, data, timestamp)); | |
107 } | |
108 | |
109 void MidiMessageFilter::EndSessionOnIOThread() { | |
110 DCHECK(io_message_loop_->BelongsToCurrentThread()); | |
111 Send(new MidiHostMsg_EndSession()); | |
112 } | |
113 | |
36 void MidiMessageFilter::Send(IPC::Message* message) { | 114 void MidiMessageFilter::Send(IPC::Message* message) { |
37 DCHECK(io_message_loop_->BelongsToCurrentThread()); | 115 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
38 if (!sender_) { | 116 if (!sender_) { |
39 delete message; | 117 delete message; |
40 } else { | 118 } else { |
41 sender_->Send(message); | 119 sender_->Send(message); |
42 } | 120 } |
43 } | 121 } |
44 | 122 |
45 bool MidiMessageFilter::OnMessageReceived(const IPC::Message& message) { | 123 bool MidiMessageFilter::OnMessageReceived(const IPC::Message& message) { |
46 DCHECK(io_message_loop_->BelongsToCurrentThread()); | 124 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
47 bool handled = true; | 125 bool handled = true; |
48 IPC_BEGIN_MESSAGE_MAP(MidiMessageFilter, message) | 126 IPC_BEGIN_MESSAGE_MAP(MidiMessageFilter, message) |
49 IPC_MESSAGE_HANDLER(MidiMsg_SessionStarted, OnSessionStarted) | 127 IPC_MESSAGE_HANDLER(MidiMsg_SessionStarted, OnSessionStarted) |
50 IPC_MESSAGE_HANDLER(MidiMsg_DataReceived, OnDataReceived) | 128 IPC_MESSAGE_HANDLER(MidiMsg_DataReceived, OnDataReceived) |
51 IPC_MESSAGE_HANDLER(MidiMsg_AcknowledgeSentData, OnAcknowledgeSentData) | 129 IPC_MESSAGE_HANDLER(MidiMsg_AcknowledgeSentData, OnAcknowledgeSentData) |
52 IPC_MESSAGE_UNHANDLED(handled = false) | 130 IPC_MESSAGE_UNHANDLED(handled = false) |
53 IPC_END_MESSAGE_MAP() | 131 IPC_END_MESSAGE_MAP() |
54 return handled; | 132 return handled; |
55 } | 133 } |
56 | 134 |
57 void MidiMessageFilter::OnFilterAdded(IPC::Sender* sender) { | 135 void MidiMessageFilter::OnFilterAdded(IPC::Sender* sender) { |
58 DCHECK(io_message_loop_->BelongsToCurrentThread()); | 136 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
59 sender_ = sender; | 137 sender_ = sender; |
60 } | 138 } |
61 | 139 |
62 void MidiMessageFilter::OnFilterRemoved() { | 140 void MidiMessageFilter::OnFilterRemoved() { |
63 DCHECK(io_message_loop_->BelongsToCurrentThread()); | 141 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
64 | |
65 // Once removed, a filter will not be used again. At this time all | 142 // Once removed, a filter will not be used again. At this time all |
66 // delegates must be notified so they release their reference. | 143 // delegates must be notified so they release their reference. |
67 OnChannelClosing(); | 144 OnChannelClosing(); |
68 } | 145 } |
69 | 146 |
70 void MidiMessageFilter::OnChannelClosing() { | 147 void MidiMessageFilter::OnChannelClosing() { |
71 DCHECK(io_message_loop_->BelongsToCurrentThread()); | 148 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
72 sender_ = NULL; | 149 sender_ = NULL; |
73 } | 150 } |
74 | 151 |
75 void MidiMessageFilter::StartSession(blink::WebMIDIAccessorClient* client) { | 152 void MidiMessageFilter::OnSessionStarted(media::MidiResult result, |
76 // Generate and keep track of a "client id" which is sent to the browser | 153 MidiPortInfoList inputs, |
77 // to ask permission to talk to MIDI hardware. | 154 MidiPortInfoList outputs) { |
78 // This id is handed back when we receive the answer in OnAccessApproved(). | 155 TRACE_EVENT0("midi", "MidiMessageFilter::OnSessionStarted"); |
79 if (clients_.find(client) == clients_.end()) { | 156 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
80 int client_id = next_available_id_++; | 157 base::AutoLock auto_lock(lock_); |
81 clients_[client] = client_id; | 158 session_result_ = result; |
82 | 159 inputs_ = inputs; |
83 io_message_loop_->PostTask(FROM_HERE, | 160 outputs_ = outputs; |
84 base::Bind(&MidiMessageFilter::StartSessionOnIOThread, this, | 161 // Handle on the main JS thread. |
85 client_id)); | 162 for (blink::WebMIDIAccessorClient* client : clients_waiting_session_queue_) { |
163 main_message_loop_->PostTask(FROM_HERE, | |
164 base::Bind(&MidiMessageFilter::HandleClientAdded, this, client)); | |
86 } | 165 } |
166 clients_waiting_session_queue_.clear(); | |
87 } | 167 } |
88 | 168 |
89 void MidiMessageFilter::StartSessionOnIOThread(int client_id) { | 169 void MidiMessageFilter::OnDataReceived(uint32 port, |
90 Send(new MidiHostMsg_StartSession(client_id)); | 170 const std::vector<uint8>& data, |
171 double timestamp) { | |
172 TRACE_EVENT0("midi", "MidiMessageFilter::OnDataReceived"); | |
173 DCHECK(io_message_loop_->BelongsToCurrentThread()); | |
174 main_message_loop_->PostTask( | |
175 FROM_HERE, | |
176 base::Bind(&MidiMessageFilter::HandleDataReceived, this, | |
177 port, data, timestamp)); | |
91 } | 178 } |
92 | 179 |
93 void MidiMessageFilter::RemoveClient(blink::WebMIDIAccessorClient* client) { | 180 void MidiMessageFilter::OnAcknowledgeSentData(size_t bytes_sent) { |
94 ClientsMap::iterator i = clients_.find(client); | 181 DCHECK(io_message_loop_->BelongsToCurrentThread()); |
95 if (i != clients_.end()) | 182 DCHECK_GE(unacknowledged_bytes_sent_, bytes_sent); |
96 clients_.erase(i); | 183 if (unacknowledged_bytes_sent_ >= bytes_sent) |
184 unacknowledged_bytes_sent_ -= bytes_sent; | |
97 } | 185 } |
98 | 186 |
99 // Received from browser. | 187 void MidiMessageFilter::HandleClientAdded( |
100 | 188 blink::WebMIDIAccessorClient* client) { |
101 void MidiMessageFilter::OnSessionStarted( | 189 TRACE_EVENT0("midi", "MidiMessageFilter::HandleClientAdded"); |
102 int client_id, | 190 DCHECK(main_message_loop_->BelongsToCurrentThread()); |
103 media::MidiResult result, | 191 media::MidiResult result; |
104 MidiPortInfoList inputs, | 192 { |
105 MidiPortInfoList outputs) { | 193 base::AutoLock auto_lock(lock_); |
106 // Handle on the main JS thread. | 194 result = session_result_; |
107 main_message_loop_->PostTask( | 195 } |
108 FROM_HERE, | |
109 base::Bind(&MidiMessageFilter::HandleSessionStarted, this, | |
110 client_id, result, inputs, outputs)); | |
111 } | |
112 | |
113 void MidiMessageFilter::HandleSessionStarted( | |
114 int client_id, | |
115 media::MidiResult result, | |
116 MidiPortInfoList inputs, | |
117 MidiPortInfoList outputs) { | |
118 blink::WebMIDIAccessorClient* client = GetClientFromId(client_id); | |
119 if (!client) | |
120 return; | |
121 | |
122 if (result == media::MIDI_OK) { | 196 if (result == media::MIDI_OK) { |
123 // Add the client's input and output ports. | 197 // Add the client's input and output ports. |
124 const bool active = true; | 198 const bool active = true; |
125 for (size_t i = 0; i < inputs.size(); ++i) { | 199 for (media::MidiPortInfo info : inputs_) { |
scherkus (not reviewing)
2014/10/20 18:05:48
won't this create a copy?
you could use const aut
Takashi Toyoshima
2014/10/21 01:49:46
Done.
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126 client->didAddInputPort( | 200 client->didAddInputPort( |
127 base::UTF8ToUTF16(inputs[i].id), | 201 base::UTF8ToUTF16(info.id), |
128 base::UTF8ToUTF16(inputs[i].manufacturer), | 202 base::UTF8ToUTF16(info.manufacturer), |
129 base::UTF8ToUTF16(inputs[i].name), | 203 base::UTF8ToUTF16(info.name), |
130 base::UTF8ToUTF16(inputs[i].version), | 204 base::UTF8ToUTF16(info.version), |
131 active); | 205 true); |
132 } | 206 } |
133 | 207 |
134 for (size_t i = 0; i < outputs.size(); ++i) { | 208 for (media::MidiPortInfo info : outputs_) { |
scherkus (not reviewing)
2014/10/20 18:05:48
ditto
Takashi Toyoshima
2014/10/21 01:49:46
Done.
| |
135 client->didAddOutputPort( | 209 client->didAddOutputPort( |
136 base::UTF8ToUTF16(outputs[i].id), | 210 base::UTF8ToUTF16(info.id), |
137 base::UTF8ToUTF16(outputs[i].manufacturer), | 211 base::UTF8ToUTF16(info.manufacturer), |
138 base::UTF8ToUTF16(outputs[i].name), | 212 base::UTF8ToUTF16(info.name), |
139 base::UTF8ToUTF16(outputs[i].version), | 213 base::UTF8ToUTF16(info.version), |
140 active); | 214 true); |
141 } | 215 } |
142 } | 216 } |
217 { | |
218 base::AutoLock auto_lock(lock_); | |
219 clients_.insert(client); | |
220 } | |
143 std::string error; | 221 std::string error; |
144 std::string message; | 222 std::string message; |
145 switch (result) { | 223 switch (result) { |
146 case media::MIDI_OK: | 224 case media::MIDI_OK: |
147 break; | 225 break; |
148 case media::MIDI_NOT_SUPPORTED: | 226 case media::MIDI_NOT_SUPPORTED: |
149 error = "NotSupportedError"; | 227 error = "NotSupportedError"; |
150 break; | 228 break; |
151 case media::MIDI_INITIALIZATION_ERROR: | 229 case media::MIDI_INITIALIZATION_ERROR: |
152 error = "InvalidStateError"; | 230 error = "InvalidStateError"; |
153 message = "Platform dependent initialization failed."; | 231 message = "Platform dependent initialization failed."; |
154 break; | 232 break; |
155 default: | 233 default: |
156 NOTREACHED(); | 234 NOTREACHED(); |
157 error = "InvalidStateError"; | 235 error = "InvalidStateError"; |
158 message = "Unknown internal error occurred."; | 236 message = "Unknown internal error occurred."; |
159 break; | 237 break; |
160 } | 238 } |
161 client->didStartSession(result == media::MIDI_OK, base::UTF8ToUTF16(error), | 239 client->didStartSession(result == media::MIDI_OK, base::UTF8ToUTF16(error), |
162 base::UTF8ToUTF16(message)); | 240 base::UTF8ToUTF16(message)); |
163 } | 241 } |
164 | 242 |
165 blink::WebMIDIAccessorClient* | |
166 MidiMessageFilter::GetClientFromId(int client_id) { | |
167 // Iterating like this seems inefficient, but in practice there generally | |
168 // will be very few clients (usually one). Additionally, this lookup | |
169 // usually happens one time during page load. So the performance hit is | |
170 // negligible. | |
171 for (ClientsMap::iterator i = clients_.begin(); i != clients_.end(); ++i) { | |
172 if ((*i).second == client_id) | |
173 return (*i).first; | |
174 } | |
175 return NULL; | |
176 } | |
177 | |
178 void MidiMessageFilter::OnDataReceived(uint32 port, | |
179 const std::vector<uint8>& data, | |
180 double timestamp) { | |
181 TRACE_EVENT0("midi", "MidiMessageFilter::OnDataReceived"); | |
182 | |
183 main_message_loop_->PostTask( | |
184 FROM_HERE, | |
185 base::Bind(&MidiMessageFilter::HandleDataReceived, this, | |
186 port, data, timestamp)); | |
187 } | |
188 | |
189 void MidiMessageFilter::OnAcknowledgeSentData(size_t bytes_sent) { | |
190 DCHECK_GE(unacknowledged_bytes_sent_, bytes_sent); | |
191 if (unacknowledged_bytes_sent_ >= bytes_sent) | |
192 unacknowledged_bytes_sent_ -= bytes_sent; | |
193 } | |
194 | |
195 void MidiMessageFilter::HandleDataReceived(uint32 port, | 243 void MidiMessageFilter::HandleDataReceived(uint32 port, |
196 const std::vector<uint8>& data, | 244 const std::vector<uint8>& data, |
197 double timestamp) { | 245 double timestamp) { |
246 TRACE_EVENT0("midi", "MidiMessageFilter::HandleDataReceived"); | |
247 DCHECK(main_message_loop_->BelongsToCurrentThread()); | |
198 DCHECK(!data.empty()); | 248 DCHECK(!data.empty()); |
199 TRACE_EVENT0("midi", "MidiMessageFilter::HandleDataReceived"); | |
200 | 249 |
201 for (ClientsMap::iterator i = clients_.begin(); i != clients_.end(); ++i) | 250 for (blink::WebMIDIAccessorClient* client : clients_) |
202 (*i).first->didReceiveMIDIData(port, &data[0], data.size(), timestamp); | 251 client->didReceiveMIDIData(port, &data[0], data.size(), timestamp); |
203 } | |
204 | |
205 void MidiMessageFilter::SendMidiData(uint32 port, | |
206 const uint8* data, | |
207 size_t length, | |
208 double timestamp) { | |
209 if (length > kMaxUnacknowledgedBytesSent) { | |
210 // TODO(toyoshim): buffer up the data to send at a later time. | |
211 // For now we're just dropping these bytes on the floor. | |
212 return; | |
213 } | |
214 | |
215 std::vector<uint8> v(data, data + length); | |
216 io_message_loop_->PostTask(FROM_HERE, | |
217 base::Bind(&MidiMessageFilter::SendMidiDataOnIOThread, this, | |
218 port, v, timestamp)); | |
219 } | |
220 | |
221 void MidiMessageFilter::SendMidiDataOnIOThread(uint32 port, | |
222 const std::vector<uint8>& data, | |
223 double timestamp) { | |
224 size_t n = data.size(); | |
225 if (n > kMaxUnacknowledgedBytesSent || | |
226 unacknowledged_bytes_sent_ > kMaxUnacknowledgedBytesSent || | |
227 n + unacknowledged_bytes_sent_ > kMaxUnacknowledgedBytesSent) { | |
228 // TODO(toyoshim): buffer up the data to send at a later time. | |
229 // For now we're just dropping these bytes on the floor. | |
230 return; | |
231 } | |
232 | |
233 unacknowledged_bytes_sent_ += n; | |
234 | |
235 // Send to the browser. | |
236 Send(new MidiHostMsg_SendData(port, data, timestamp)); | |
237 } | 252 } |
238 | 253 |
239 } // namespace content | 254 } // namespace content |
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