1 files changed, 102 insertions, 0 deletions
diff --git a/dom/midi/MIDIOutput.cpp b/dom/midi/MIDIOutput.cpp
new file mode 100644
index 0000000000..3cdd7d308d
--- /dev/null
+++ b/dom/midi/MIDIOutput.cpp
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/MIDIOutput.h"
+#include "mozilla/dom/MIDIPortChild.h"
+#include "mozilla/dom/MIDITypes.h"
+#include "mozilla/dom/MIDIOutputBinding.h"
+#include "mozilla/dom/MIDIUtils.h"
+#include "nsDOMNavigationTiming.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Performance.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+MIDIOutput::MIDIOutput(nsPIDOMWindowInner* aWindow) : MIDIPort(aWindow) {}
+
+// static
+RefPtr<MIDIOutput> MIDIOutput::Create(nsPIDOMWindowInner* aWindow,
+                                      MIDIAccess* aMIDIAccessParent,
+                                      const MIDIPortInfo& aPortInfo,
+                                      const bool aSysexEnabled) {
+  MOZ_ASSERT(static_cast<MIDIPortType>(aPortInfo.type()) ==
+             MIDIPortType::Output);
+  RefPtr<MIDIOutput> port = new MIDIOutput(aWindow);
+  if (NS_WARN_IF(
+          !port->Initialize(aPortInfo, aSysexEnabled, aMIDIAccessParent))) {
+    return nullptr;
+  }
+  return port;
+}
+
+JSObject* MIDIOutput::WrapObject(JSContext* aCx,
+                                 JS::Handle<JSObject*> aGivenProto) {
+  return MIDIOutput_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+void MIDIOutput::Send(const Sequence<uint8_t>& aData,
+                      const Optional<double>& aTimestamp, ErrorResult& aRv) {
+  if (Port()->DeviceState() == MIDIPortDeviceState::Disconnected) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return;
+  }
+  // The timestamp passed to us is a DOMHighResTimestamp, which is in relation
+  // to the start of navigation timing. This needs to be turned into a
+  // TimeStamp before it hits the platform specific MIDI service.
+  //
+  // If timestamp is either not set or zero, set timestamp to now and send the
+  // message ASAP.
+  TimeStamp timestamp;
+  if (aTimestamp.WasPassed() && aTimestamp.Value() != 0) {
+    nsCOMPtr<Document> doc = GetOwner()->GetDoc();
+    if (!doc) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+      return;
+    }
+    TimeDuration ts_diff = TimeDuration::FromMilliseconds(aTimestamp.Value());
+    timestamp = GetOwner()
+                    ->GetPerformance()
+                    ->GetDOMTiming()
+                    ->GetNavigationStartTimeStamp() +
+                ts_diff;
+  } else {
+    timestamp = TimeStamp::Now();
+  }
+
+  nsTArray<MIDIMessage> msgArray;
+  bool ret = MIDIUtils::ParseMessages(aData, timestamp, msgArray);
+  if (!ret) {
+    aRv.ThrowTypeError("Invalid MIDI message");
+    return;
+  }
+
+  if (msgArray.IsEmpty()) {
+    aRv.ThrowTypeError("Empty message array");
+    return;
+  }
+
+  // TODO Move this check back to parse message so we don't have to iterate
+  // twice.
+  if (!SysexEnabled()) {
+    for (auto& msg : msgArray) {
+      if (MIDIUtils::IsSysexMessage(msg)) {
+        aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+        return;
+      }
+    }
+  }
+  Port()->SendSend(msgArray);
+}
+
+void MIDIOutput::Clear() {
+  if (Port()->ConnectionState() == MIDIPortConnectionState::Closed) {
+    return;
+  }
+  Port()->SendClear();
+}