Web MIDI API back-end (work-in-progress)

content/renderer/media/renderer_webmidiaccessor_impl.cc

Index: content/renderer/media/renderer_webmidiaccessor_impl.cc
diff --git a/content/renderer/media/renderer_webmidiaccessor_impl.cc b/content/renderer/media/renderer_webmidiaccessor_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0a8b68f6d3b53c119398b0e985ce5f005fa5f50a
--- /dev/null
+++ b/content/renderer/media/renderer_webmidiaccessor_impl.cc
@@ -0,0 +1,43 @@
+// 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/renderer/media/renderer_webmidiaccessor_impl.h"
+
+#include "base/logging.h"
+#include "content/renderer/media/midi_message_filter.h"
+#include "content/renderer/render_thread_impl.h"
+
+namespace content {
+
+RendererWebMIDIAccessorImpl::RendererWebMIDIAccessorImpl(
+    WebKit::WebMIDIAccessorClient* client)
+    : client_(client) {
+  DCHECK(client_);
+}
+
+RendererWebMIDIAccessorImpl::~RendererWebMIDIAccessorImpl() {
+  midi_message_filter()->RemoveClient(client_);
+}
+
+void RendererWebMIDIAccessorImpl::requestAccess(bool access) {
+  midi_message_filter()->RequestAccess(client_, access ? 1 : 0);
+}
+
+void RendererWebMIDIAccessorImpl::sendMIDIData(
+    unsigned port_index,
+    const unsigned char* data,
+    size_t length,
+    double timestamp) {
+  midi_message_filter()->SendMIDIData(
+      port_index,
+      data,
+      length,
+      timestamp);
+}
+
+MIDIMessageFilter* RendererWebMIDIAccessorImpl::midi_message_filter() {
+  return RenderThreadImpl::current()->midi_message_filter();
+}
+
+}  // namespace content