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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef MIDIAccess_h
     32 #define MIDIAccess_h
     33 
     34 #include "bindings/core/v8/ScriptPromise.h"
     35 #include "core/dom/ActiveDOMObject.h"
     36 #include "modules/EventTargetModules.h"
     37 #include "modules/webmidi/MIDIAccessInitializer.h"
     38 #include "modules/webmidi/MIDIAccessor.h"
     39 #include "modules/webmidi/MIDIAccessorClient.h"
     40 #include "platform/heap/Handle.h"
     41 #include "wtf/Vector.h"
     42 
     43 namespace blink {
     44 
     45 class ExecutionContext;
     46 class MIDIInput;
     47 class MIDIInputMap;
     48 class MIDIOutput;
     49 class MIDIOutputMap;
     50 
     51 class MIDIAccess FINAL : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MIDIAccess>, public ActiveDOMObject, public EventTargetWithInlineData, public MIDIAccessorClient {
     52     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MIDIAccess>);
     53     DEFINE_WRAPPERTYPEINFO();
     54     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
     55 public:
     56     static MIDIAccess* create(PassOwnPtr<MIDIAccessor> accessor, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>& ports, ExecutionContext* executionContext)
     57     {
     58         MIDIAccess* access = adoptRefCountedGarbageCollectedWillBeNoop(new MIDIAccess(accessor, sysexEnabled, ports, executionContext));
     59         access->suspendIfNeeded();
     60         return access;
     61     }
     62     virtual ~MIDIAccess();
     63 
     64     MIDIInputMap* inputs() const;
     65     MIDIOutputMap* outputs() const;
     66 
     67     DEFINE_ATTRIBUTE_EVENT_LISTENER(connect);
     68     DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);
     69 
     70     bool sysexEnabled() const { return m_sysexEnabled; }
     71 
     72     // EventTarget
     73     virtual const AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::MIDIAccess; }
     74     virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
     75 
     76     // ActiveDOMObject
     77     virtual void stop() OVERRIDE;
     78 
     79     // MIDIAccessorClient
     80     virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     81     virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     82     virtual void didStartSession(bool success, const String& error, const String& message) OVERRIDE
     83     {
     84         // This method is for MIDIAccess initialization: MIDIAccessInitializer
     85         // has the implementation.
     86         ASSERT_NOT_REACHED();
     87     }
     88     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;
     89 
     90     // |timeStampInMilliseconds| is in the same time coordinate system as performance.now().
     91     void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStampInMilliseconds);
     92 
     93     virtual void trace(Visitor*) OVERRIDE;
     94 
     95 private:
     96     MIDIAccess(PassOwnPtr<MIDIAccessor>, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>&, ExecutionContext*);
     97 
     98     OwnPtr<MIDIAccessor> m_accessor;
     99     bool m_sysexEnabled;
    100     HeapVector<Member<MIDIInput> > m_inputs;
    101     HeapVector<Member<MIDIOutput> > m_outputs;
    102 };
    103 
    104 } // namespace blink
    105 
    106 #endif // MIDIAccess_h
    107