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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 #include "config.h"
     32 #include "modules/webmidi/MIDIOutput.h"
     33 
     34 #include "bindings/v8/ExceptionState.h"
     35 #include "core/dom/ExceptionCode.h"
     36 #include "modules/webmidi/MIDIAccess.h"
     37 
     38 namespace WebCore {
     39 
     40 PassRefPtr<MIDIOutput> MIDIOutput::create(MIDIAccess* access, unsigned portIndex, ExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
     41 {
     42     ASSERT(access);
     43     RefPtr<MIDIOutput> output = adoptRef(new MIDIOutput(access, portIndex, context, id, manufacturer, name, version));
     44     output->suspendIfNeeded();
     45     return output.release();
     46 }
     47 
     48 MIDIOutput::MIDIOutput(MIDIAccess* access, unsigned portIndex, ExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
     49     : MIDIPort(context, id, manufacturer, name, MIDIPortTypeOutput, version)
     50     , m_access(access)
     51     , m_portIndex(portIndex)
     52 {
     53     ScriptWrappable::init(this);
     54 }
     55 
     56 MIDIOutput::~MIDIOutput()
     57 {
     58 }
     59 
     60 void MIDIOutput::send(Uint8Array* array, double timestamp, ExceptionState& exceptionState)
     61 {
     62     if (!array)
     63         return;
     64 
     65     const unsigned char* data = array->data();
     66     size_t length = array->length();
     67 
     68     // Filter out System Exclusive messages if we're not allowed.
     69     // FIXME: implement more extensive filtering.
     70     if (length > 0 && data[0] >= 0xf0 && !m_access->sysExEnabled()) {
     71         exceptionState.throwSecurityError("permission to send system exclusive messages is denied.");
     72         return;
     73     }
     74 
     75     m_access->sendMIDIData(m_portIndex, data, length, timestamp);
     76 }
     77 
     78 void MIDIOutput::send(Vector<unsigned> unsignedData, double timestamp, ExceptionState& exceptionState)
     79 {
     80     RefPtr<Uint8Array> array = Uint8Array::create(unsignedData.size());
     81 
     82     for (size_t i = 0; i < unsignedData.size(); ++i) {
     83         if (unsignedData[i] > 0xff) {
     84             exceptionState.throwUninformativeAndGenericDOMException(InvalidStateError);
     85             return;
     86         }
     87         unsigned char value = unsignedData[i] & 0xff;
     88         array->set(i, value);
     89     }
     90 
     91     send(array.get(), timestamp, exceptionState);
     92 }
     93 
     94 void MIDIOutput::send(Uint8Array* data, ExceptionState& exceptionState)
     95 {
     96     send(data, 0, exceptionState);
     97 }
     98 
     99 void MIDIOutput::send(Vector<unsigned> unsignedData, ExceptionState& exceptionState)
    100 {
    101     send(unsignedData, 0, exceptionState);
    102 }
    103 
    104 } // namespace WebCore
    105