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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/v8/ScriptPromise.h"
     35 #include "bindings/v8/ScriptWrappable.h"
     36 #include "core/dom/ActiveDOMObject.h"
     37 #include "modules/EventTargetModules.h"
     38 #include "modules/webmidi/MIDIAccessInitializer.h"
     39 #include "modules/webmidi/MIDIAccessor.h"
     40 #include "modules/webmidi/MIDIAccessorClient.h"
     41 #include "modules/webmidi/MIDIInput.h"
     42 #include "modules/webmidi/MIDIOutput.h"
     43 #include "platform/heap/Handle.h"
     44 #include "wtf/RefCounted.h"
     45 #include "wtf/RefPtr.h"
     46 #include "wtf/Vector.h"
     47 
     48 namespace WebCore {
     49 
     50 class ExecutionContext;
     51 struct MIDIOptions;
     52 
     53 class MIDIAccess FINAL : public RefCountedWillBeRefCountedGarbageCollected<MIDIAccess>, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public MIDIAccessorClient {
     54     REFCOUNTED_EVENT_TARGET(MIDIAccess);
     55     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MIDIAccess);
     56 public:
     57     static PassRefPtrWillBeRawPtr<MIDIAccess> create(PassOwnPtr<MIDIAccessor> accessor, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>& ports, ExecutionContext* executionContext)
     58     {
     59         RefPtrWillBeRawPtr<MIDIAccess> access = adoptRefWillBeRefCountedGarbageCollected(new MIDIAccess(accessor, sysexEnabled, ports, executionContext));
     60         access->suspendIfNeeded();
     61         return access;
     62     }
     63     virtual ~MIDIAccess();
     64 
     65     MIDIInputVector inputs() const { return m_inputs; }
     66     MIDIOutputVector outputs() const { return m_outputs; }
     67 
     68     DEFINE_ATTRIBUTE_EVENT_LISTENER(connect);
     69     DEFINE_ATTRIBUTE_EVENT_LISTENER(disconnect);
     70 
     71     bool sysexEnabled() const { return m_sysexEnabled; }
     72 
     73     // EventTarget
     74     virtual const AtomicString& interfaceName() const OVERRIDE { return EventTargetNames::MIDIAccess; }
     75     virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
     76 
     77     // ActiveDOMObject
     78     virtual void stop() OVERRIDE;
     79 
     80     // MIDIAccessorClient
     81     virtual void didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     82     virtual void didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version) OVERRIDE;
     83     virtual void didStartSession(bool success, const String& error, const String& message) OVERRIDE
     84     {
     85         // This method is for MIDIAccess initialization: MIDIAccessInitializer
     86         // has the implementation.
     87         ASSERT_NOT_REACHED();
     88     }
     89     virtual void didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp) OVERRIDE;
     90 
     91     // |timeStampInMilliseconds| is in the same time coordinate system as performance.now().
     92     void sendMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStampInMilliseconds);
     93 
     94     virtual void trace(Visitor*) OVERRIDE;
     95 
     96 private:
     97     MIDIAccess(PassOwnPtr<MIDIAccessor>, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>&, ExecutionContext*);
     98 
     99     OwnPtr<MIDIAccessor> m_accessor;
    100     bool m_sysexEnabled;
    101     MIDIInputVector m_inputs;
    102     MIDIOutputVector m_outputs;
    103 };
    104 
    105 } // namespace WebCore
    106 
    107 #endif // MIDIAccess_h
    108