/* * Copyright (C) 2013 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include "modules/webmidi/MIDIAccess.h" #include "core/dom/DOMError.h" #include "core/dom/Document.h" #include "core/loader/DocumentLoadTiming.h" #include "core/loader/DocumentLoader.h" #include "modules/webmidi/MIDIAccessPromise.h" #include "modules/webmidi/MIDIConnectionEvent.h" #include "modules/webmidi/MIDIController.h" #include "modules/webmidi/MIDIPort.h" namespace WebCore { PassRefPtr MIDIAccess::create(ExecutionContext* context, MIDIAccessPromise* promise) { RefPtr midiAccess(adoptRef(new MIDIAccess(context, promise))); midiAccess->suspendIfNeeded(); midiAccess->startRequest(); return midiAccess.release(); } MIDIAccess::~MIDIAccess() { stop(); } MIDIAccess::MIDIAccess(ExecutionContext* context, MIDIAccessPromise* promise) : ActiveDOMObject(context) , m_promise(promise) , m_hasAccess(false) , m_sysExEnabled(false) , m_requesting(false) { ScriptWrappable::init(this); m_accessor = MIDIAccessor::create(this); } void MIDIAccess::setSysExEnabled(bool enable) { m_requesting = false; m_sysExEnabled = enable; if (enable) m_accessor->startSession(); else permissionDenied(); } void MIDIAccess::didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version) { ASSERT(isMainThread()); m_inputs.append(MIDIInput::create(this, executionContext(), id, manufacturer, name, version)); } void MIDIAccess::didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version) { ASSERT(isMainThread()); unsigned portIndex = m_outputs.size(); m_outputs.append(MIDIOutput::create(this, portIndex, executionContext(), id, manufacturer, name, version)); } void MIDIAccess::didStartSession(bool success) { ASSERT(isMainThread()); m_hasAccess = success; if (success) m_promise->fulfill(); else m_promise->reject(DOMError::create("InvalidStateError")); } void MIDIAccess::didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) { ASSERT(isMainThread()); if (m_hasAccess && portIndex < m_inputs.size()) { // Convert from time in seconds which is based on the time coordinate system of monotonicallyIncreasingTime() // into time in milliseconds (a DOMHighResTimeStamp) according to the same time coordinate system as performance.now(). // This is how timestamps are defined in the Web MIDI spec. Document* document = toDocument(executionContext()); ASSERT(document); double timeStampInMilliseconds = 1000 * document->loader()->timing()->monotonicTimeToZeroBasedDocumentTime(timeStamp); m_inputs[portIndex]->didReceiveMIDIData(portIndex, data, length, timeStampInMilliseconds); } } void MIDIAccess::sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStampInMilliseconds) { if (m_hasAccess && portIndex < m_outputs.size() && data && length > 1) { // Convert from a time in milliseconds (a DOMHighResTimeStamp) according to the same time coordinate system as performance.now() // into a time in seconds which is based on the time coordinate system of monotonicallyIncreasingTime(). double timeStamp; if (!timeStampInMilliseconds) { // We treat a value of 0 (which is the default value) as special, meaning "now". // We need to translate it exactly to 0 seconds. timeStamp = 0; } else { Document* document = toDocument(executionContext()); ASSERT(document); double documentStartTime = document->loader()->timing()->referenceMonotonicTime(); timeStamp = documentStartTime + 0.001 * timeStampInMilliseconds; } m_accessor->sendMIDIData(portIndex, data, length, timeStamp); } } void MIDIAccess::stop() { m_hasAccess = false; if (!m_requesting) return; m_requesting = false; Document* document = toDocument(executionContext()); ASSERT(document); MIDIController* controller = MIDIController::from(document->page()); ASSERT(controller); controller->cancelSysExPermissionRequest(this); m_accessor.clear(); } void MIDIAccess::startRequest() { if (!m_promise->options()->sysex) { m_accessor->startSession(); return; } Document* document = toDocument(executionContext()); ASSERT(document); MIDIController* controller = MIDIController::from(document->page()); if (controller) { m_requesting = true; controller->requestSysExPermission(this); } else { permissionDenied(); } } void MIDIAccess::permissionDenied() { ASSERT(isMainThread()); m_hasAccess = false; m_promise->reject(DOMError::create("SecurityError")); } } // namespace WebCore