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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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "modules/mediastream/RTCDTMFSender.h"
     28 
     29 #include "bindings/v8/ExceptionState.h"
     30 #include "core/dom/ExceptionCode.h"
     31 #include "core/dom/ExecutionContext.h"
     32 #include "core/platform/mediastream/RTCPeerConnectionHandler.h"
     33 #include "modules/mediastream/MediaStreamTrack.h"
     34 #include "modules/mediastream/RTCDTMFToneChangeEvent.h"
     35 #include "platform/mediastream/RTCDTMFSenderHandler.h"
     36 
     37 namespace WebCore {
     38 
     39 static const long minToneDurationMs = 70;
     40 static const long defaultToneDurationMs = 100;
     41 static const long maxToneDurationMs = 6000;
     42 static const long minInterToneGapMs = 50;
     43 static const long defaultInterToneGapMs = 50;
     44 
     45 PassRefPtr<RTCDTMFSender> RTCDTMFSender::create(ExecutionContext* context, RTCPeerConnectionHandler* peerConnectionHandler, PassRefPtr<MediaStreamTrack> prpTrack, ExceptionState& exceptionState)
     46 {
     47     RefPtr<MediaStreamTrack> track = prpTrack;
     48     OwnPtr<RTCDTMFSenderHandler> handler = peerConnectionHandler->createDTMFSender(track->component());
     49     if (!handler) {
     50         exceptionState.throwUninformativeAndGenericDOMException(NotSupportedError);
     51         return 0;
     52     }
     53 
     54     RefPtr<RTCDTMFSender> dtmfSender = adoptRef(new RTCDTMFSender(context, track, handler.release()));
     55     dtmfSender->suspendIfNeeded();
     56     return dtmfSender.release();
     57 }
     58 
     59 RTCDTMFSender::RTCDTMFSender(ExecutionContext* context, PassRefPtr<MediaStreamTrack> track, PassOwnPtr<RTCDTMFSenderHandler> handler)
     60     : ActiveDOMObject(context)
     61     , m_track(track)
     62     , m_duration(defaultToneDurationMs)
     63     , m_interToneGap(defaultInterToneGapMs)
     64     , m_handler(handler)
     65     , m_stopped(false)
     66     , m_scheduledEventTimer(this, &RTCDTMFSender::scheduledEventTimerFired)
     67 {
     68     ScriptWrappable::init(this);
     69     m_handler->setClient(this);
     70 }
     71 
     72 RTCDTMFSender::~RTCDTMFSender()
     73 {
     74 }
     75 
     76 bool RTCDTMFSender::canInsertDTMF() const
     77 {
     78     return m_handler->canInsertDTMF();
     79 }
     80 
     81 MediaStreamTrack* RTCDTMFSender::track() const
     82 {
     83     return m_track.get();
     84 }
     85 
     86 String RTCDTMFSender::toneBuffer() const
     87 {
     88     return m_handler->currentToneBuffer();
     89 }
     90 
     91 void RTCDTMFSender::insertDTMF(const String& tones, ExceptionState& exceptionState)
     92 {
     93     insertDTMF(tones, defaultToneDurationMs, defaultInterToneGapMs, exceptionState);
     94 }
     95 
     96 void RTCDTMFSender::insertDTMF(const String& tones, long duration, ExceptionState& exceptionState)
     97 {
     98     insertDTMF(tones, duration, defaultInterToneGapMs, exceptionState);
     99 }
    100 
    101 void RTCDTMFSender::insertDTMF(const String& tones, long duration, long interToneGap, ExceptionState& exceptionState)
    102 {
    103     if (!canInsertDTMF()) {
    104         exceptionState.throwUninformativeAndGenericDOMException(NotSupportedError);
    105         return;
    106     }
    107 
    108     if (duration > maxToneDurationMs || duration < minToneDurationMs) {
    109         exceptionState.throwUninformativeAndGenericDOMException(SyntaxError);
    110         return;
    111     }
    112 
    113     if (interToneGap < minInterToneGapMs) {
    114         exceptionState.throwUninformativeAndGenericDOMException(SyntaxError);
    115         return;
    116     }
    117 
    118     m_duration = duration;
    119     m_interToneGap = interToneGap;
    120 
    121     if (!m_handler->insertDTMF(tones, m_duration, m_interToneGap))
    122         exceptionState.throwUninformativeAndGenericDOMException(SyntaxError);
    123 }
    124 
    125 void RTCDTMFSender::didPlayTone(const String& tone)
    126 {
    127     scheduleDispatchEvent(RTCDTMFToneChangeEvent::create(tone));
    128 }
    129 
    130 const AtomicString& RTCDTMFSender::interfaceName() const
    131 {
    132     return EventTargetNames::RTCDTMFSender;
    133 }
    134 
    135 ExecutionContext* RTCDTMFSender::executionContext() const
    136 {
    137     return ActiveDOMObject::executionContext();
    138 }
    139 
    140 void RTCDTMFSender::stop()
    141 {
    142     m_stopped = true;
    143     m_handler->setClient(0);
    144 }
    145 
    146 void RTCDTMFSender::scheduleDispatchEvent(PassRefPtr<Event> event)
    147 {
    148     m_scheduledEvents.append(event);
    149 
    150     if (!m_scheduledEventTimer.isActive())
    151         m_scheduledEventTimer.startOneShot(0);
    152 }
    153 
    154 void RTCDTMFSender::scheduledEventTimerFired(Timer<RTCDTMFSender>*)
    155 {
    156     if (m_stopped)
    157         return;
    158 
    159     Vector<RefPtr<Event> > events;
    160     events.swap(m_scheduledEvents);
    161 
    162     Vector<RefPtr<Event> >::iterator it = events.begin();
    163     for (; it != events.end(); ++it)
    164         dispatchEvent((*it).release());
    165 }
    166 
    167 } // namespace WebCore
    168