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