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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "content/browser/renderer_host/media/midi_host.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/bind_helpers.h" | |
| 9 #include "base/debug/trace_event.h" | |
| 10 #include "base/process.h" | |
| 11 #include "content/browser/browser_main_loop.h" | |
| 12 #include "content/browser/media/media_internals.h" | |
| 13 #include "content/common/media/midi_messages.h" | |
| 14 #include "content/public/browser/content_browser_client.h" | |
| 15 #include "content/public/browser/media_observer.h" | |
| 16 #include "media/midi/midi_manager.h" | |
| 17 | |
| 18 using media::MIDIManager; | |
| 19 using media::MIDIPortInfoList; | |
| 20 | |
| 21 namespace content { | |
| 22 | |
| 23 MIDIHost::MIDIHost(media::MIDIManager* midi_manager) | |
| 24 : midi_manager_(midi_manager) { | |
| 25 } | |
| 26 | |
| 27 MIDIHost::~MIDIHost() { | |
| 28 if (midi_manager_) | |
| 29 midi_manager_->ReleaseAccess(this); | |
| 30 } | |
| 31 | |
| 32 void MIDIHost::OnChannelClosing() { | |
| 33 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 34 | |
| 35 BrowserMessageFilter::OnChannelClosing(); | |
| 36 } | |
| 37 | |
| 38 void MIDIHost::OnDestruct() const { | |
| 39 BrowserThread::DeleteOnIOThread::Destruct(this); | |
| 40 } | |
| 41 | |
| 42 /////////////////////////////////////////////////////////////////////////////// | |
| 43 // IPC Messages handler | |
| 44 bool MIDIHost::OnMessageReceived(const IPC::Message& message, | |
| 45 bool* message_was_ok) { | |
| 46 bool handled = true; | |
| 47 IPC_BEGIN_MESSAGE_MAP_EX(MIDIHost, message, *message_was_ok) | |
| 48 IPC_MESSAGE_HANDLER(MIDIHostMsg_RequestAccess, OnRequestAccess) | |
| 49 IPC_MESSAGE_HANDLER(MIDIHostMsg_SendData, OnSendData) | |
| 50 IPC_MESSAGE_UNHANDLED(handled = false) | |
| 51 IPC_END_MESSAGE_MAP_EX() | |
| 52 | |
| 53 return handled; | |
| 54 } | |
| 55 | |
| 56 void MIDIHost::OnRequestAccess(int client_id, int access) { | |
| 57 MIDIPortInfoList input_ports; | |
| 58 MIDIPortInfoList output_ports; | |
| 59 | |
| 60 // Ask permission and register to receive MIDI data. | |
| 61 bool approved = false; | |
| 62 if (midi_manager_) { | |
| 63 approved = midi_manager_->RequestAccess(this, access); | |
| 64 if (approved) { | |
| 65 input_ports = midi_manager_->input_ports(); | |
| 66 output_ports = midi_manager_->output_ports(); | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 Send(new MIDIMsg_AccessApproved( | |
| 71 client_id, | |
| 72 access, | |
| 73 approved, | |
| 74 input_ports, | |
| 75 output_ports)); | |
| 76 } | |
| 77 | |
| 78 void MIDIHost::OnSendData(int port, | |
| 79 const std::vector<uint8>& data, | |
| 80 double timestamp) { | |
| 81 // TODO(crogers): we need to post this to a dedicated thread for | |
| 82 // sending MIDI. For now, we will not implement the sending of MIDI data. | |
| 83 NOTIMPLEMENTED(); | |
| 84 // if (midi_manager_) | |
| 85 // midi_manager_->SendMIDIData(port, data.data(), data.size(), timestamp); | |
| 86 } | |
| 87 | |
| 88 void MIDIHost::ReceiveMIDIData( | |
| 89 int port_index, | |
| 90 const uint8* data, | |
| 91 size_t length, | |
| 92 double timestamp) { | |
| 93 TRACE_EVENT0("midi", "MIDIHost::ReceiveMIDIData"); | |
| 94 // Send to the renderer. | |
| 95 std::vector<uint8> v(data, data + length); | |
| 96 Send(new MIDIMsg_DataReceived(port_index, v, timestamp)); | |
| 97 } | |
| 98 | |
| 99 } // namespace content | |
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Chromium Code Reviews
Issue 17334006:
Revert 207983 "Implement Web MIDI API back-end" (Closed)
Base URL: svn://svn.chromium.org/chrome/