| /* |
| * 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/MIDIInput.h" |
| #include "modules/webmidi/MIDIOutput.h" |
| #include "modules/webmidi/MIDIPort.h" |
| |
| namespace WebCore { |
| |
| PassRefPtr<MIDIAccess> MIDIAccess::create(ScriptExecutionContext* context, MIDIAccessPromise* promise) |
| { |
| RefPtr<MIDIAccess> midiAccess(adoptRef(new MIDIAccess(context, promise))); |
| midiAccess->suspendIfNeeded(); |
| midiAccess->startRequest(); |
| return midiAccess.release(); |
| } |
| |
| MIDIAccess::~MIDIAccess() |
| { |
| stop(); |
| } |
| |
| MIDIAccess::MIDIAccess(ScriptExecutionContext* 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, scriptExecutionContext(), 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, scriptExecutionContext(), 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(scriptExecutionContext()); |
| 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(scriptExecutionContext()); |
| 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(scriptExecutionContext()); |
| 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(scriptExecutionContext()); |
| 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 |