Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1179)

Unified Diff: content/browser/renderer_host/media/midi_host.cc

Issue 16025005: Web MIDI API back-end (work-in-progress) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: For now disable sending data - fix IPC thread in renderer Created 7 years, 6 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: content/browser/renderer_host/media/midi_host.cc
diff --git a/content/browser/renderer_host/media/midi_host.cc b/content/browser/renderer_host/media/midi_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..56f4099f60b62d41ef6475902608781061a23e9d
--- /dev/null
+++ b/content/browser/renderer_host/media/midi_host.cc
@@ -0,0 +1,99 @@
+// 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 "content/browser/renderer_host/media/midi_host.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/debug/trace_event.h"
+#include "base/process.h"
+#include "content/browser/browser_main_loop.h"
+#include "content/browser/media/media_internals.h"
+#include "content/common/media/midi_messages.h"
+#include "content/public/browser/content_browser_client.h"
+#include "content/public/browser/media_observer.h"
+#include "media/midi/midi_manager.h"
+
+using media::MIDIManager;
+using media::MIDIPortInfoList;
+
+namespace content {
+
+MIDIHost::MIDIHost(media::MIDIManager* midi_manager)
+ : midi_manager_(midi_manager) {
+}
+
+MIDIHost::~MIDIHost() {
+ if (midi_manager_)
+ midi_manager_->ReleaseAccess(this);
+}
+
+void MIDIHost::OnChannelClosing() {
+ DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+ BrowserMessageFilter::OnChannelClosing();
+}
+
+void MIDIHost::OnDestruct() const {
+ BrowserThread::DeleteOnIOThread::Destruct(this);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// IPC Messages handler
+bool MIDIHost::OnMessageReceived(const IPC::Message& message,
+ bool* message_was_ok) {
+ bool handled = true;
+ IPC_BEGIN_MESSAGE_MAP_EX(MIDIHost, message, *message_was_ok)
+ IPC_MESSAGE_HANDLER(MIDIHostMsg_RequestAccess, OnRequestAccess)
+ IPC_MESSAGE_HANDLER(MIDIHostMsg_SendData, OnSendData)
+ IPC_MESSAGE_UNHANDLED(handled = false)
+ IPC_END_MESSAGE_MAP_EX()
+
+ return handled;
+}
+
+void MIDIHost::OnRequestAccess(int client_id, int access) {
+ MIDIPortInfoList input_ports;
+ MIDIPortInfoList output_ports;
+
+ // Ask permission and register to receive MIDI data.
+ bool approved = false;
+ if (midi_manager_) {
+ approved = midi_manager_->RequestAccess(this, access);
+ if (approved) {
+ input_ports = midi_manager_->input_ports();
+ output_ports = midi_manager_->output_ports();
+ }
+ }
+
+ Send(new MIDIMsg_AccessApproved(
+ client_id,
+ access,
+ approved,
+ input_ports,
+ output_ports));
+}
+
+void MIDIHost::OnSendData(int port,
+ const std::vector<uint8>& data,
+ double timestamp) {
+ // TODO(crogers): we need to post this to a dedicated thread for
+ // sending MIDI. For now, we will not implement the sending of MIDI data.
+ NOTIMPLEMENTED();
+ // if (midi_manager_)
+ // midi_manager_->SendMIDIData(port, data.data(), data.size(), timestamp);
+}
+
+void MIDIHost::ReceiveMIDIData(
+ int port_index,
+ const uint8* data,
+ size_t length,
+ double timestamp) {
+ TRACE_EVENT0("midi", "MIDIHost::ReceiveMIDIData");
+ // Send to the renderer.
+ std::vector<uint8> v(data, data + length);
+ Send(new MIDIMsg_DataReceived(port_index, v, timestamp));
+}
+
+} // namespace content

Powered by Google App Engine
This is Rietveld 408576698