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Unified Diff: media/midi/midi_manager.cc

Issue 16025005: Web MIDI API back-end (work-in-progress) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: add stub for non-OSX MIDIManagers Created 7 years, 6 months ago
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Index: media/midi/midi_manager.cc
diff --git a/media/midi/midi_manager.cc b/media/midi/midi_manager.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f9918656b1ba019bcbaba3bd77d31a924ac4eb13
--- /dev/null
+++ b/media/midi/midi_manager.cc
@@ -0,0 +1,67 @@
+// 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.h"
+
+namespace media {
+
+#if !defined(OS_MACOSX)
+// TODO(crogers): implement MIDIManager for other platforms.
+MIDIManager* MIDIManager::Create() {
+ return NULL;
+}
+#endif
+
+MIDIManager::MIDIManager()
+ : initialized_(false) {
+}
+
+MIDIManager::~MIDIManager() {}
+
+bool MIDIManager::RequestAccess(MIDIManagerClient* client, int access) {
+ // TODO(crogers): determine if user prompt is necessary here.
+ // For now, simply don't allow sysex.
+ if (access != kNoSystemExclusive)
+ return false;
+
+ // Lazily initialize the MIDI back-end.
+ if (!initialized_)
+ initialized_ = Initialize();
+
+ if (initialized_) {
+ base::AutoLock auto_lock(clients_lock_);
+ clients_.insert(client);
+ }
+
+ return initialized_;
+}
+
+void MIDIManager::ReleaseAccess(MIDIManagerClient* client) {
+ base::AutoLock auto_lock(clients_lock_);
+ ClientList::iterator i = clients_.find(client);
+ if (i != clients_.end())
+ clients_.erase(i);
+}
+
+void MIDIManager::AddInputPort(const MIDIPortInfo& info) {
+ input_ports_.push_back(info);
+}
+
+void MIDIManager::AddOutputPort(const MIDIPortInfo& info) {
+ output_ports_.push_back(info);
+}
+
+void MIDIManager::ReceiveMIDIData(
+ int port_index,
+ const uint8* data,
+ size_t length,
+ double timestamp) {
+ base::AutoLock auto_lock(clients_lock_);
+
+ // TODO(crogers): Filter out sysex.
+ for (ClientList::iterator i = clients_.begin(); i != clients_.end(); ++i)
+ (*i)->ReceiveMIDIData(port_index, data, length, timestamp);
+};
+
+} // namespace media

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