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
28#if ENABLE(MEDIA_STREAM)
29
30#include "RTCDTMFSender.h"
31
32#include "ExceptionCode.h"
33#include "MediaStreamTrack.h"
34#include "RTCDTMFSenderHandler.h"
35#include "RTCDTMFToneChangeEvent.h"
36#include "RTCPeerConnectionHandler.h"
37#include "ScriptExecutionContext.h"
38
39namespace WebCore {
40
41static const long minToneDurationMs = 70;
42static const long defaultToneDurationMs = 100;
43static const long maxToneDurationMs = 6000;
44static const long minInterToneGapMs = 50;
45static const long defaultInterToneGapMs = 50;
46
47PassRefPtr<RTCDTMFSender> RTCDTMFSender::create(ScriptExecutionContext* context, RTCPeerConnectionHandler* peerConnectionHandler, PassRefPtr<MediaStreamTrack> prpTrack, ExceptionCode& ec)
48{
49    RefPtr<MediaStreamTrack> track = prpTrack;
50    OwnPtr<RTCDTMFSenderHandler> handler = peerConnectionHandler->createDTMFSender(track->component());
51    if (!handler) {
52        ec = NOT_SUPPORTED_ERR;
53        return 0;
54    }
55
56    RefPtr<RTCDTMFSender> dtmfSender = adoptRef(new RTCDTMFSender(context, track, handler.release()));
57    dtmfSender->suspendIfNeeded();
58    return dtmfSender.release();
59}
60
61RTCDTMFSender::RTCDTMFSender(ScriptExecutionContext* context, PassRefPtr<MediaStreamTrack> track, PassOwnPtr<RTCDTMFSenderHandler> handler)
62    : ActiveDOMObject(context)
63    , m_track(track)
64    , m_duration(defaultToneDurationMs)
65    , m_interToneGap(defaultInterToneGapMs)
66    , m_handler(handler)
67    , m_stopped(false)
68    , m_scheduledEventTimer(this, &RTCDTMFSender::scheduledEventTimerFired)
69{
70    m_handler->setClient(this);
71}
72
73RTCDTMFSender::~RTCDTMFSender()
74{
75}
76
77bool RTCDTMFSender::canInsertDTMF() const
78{
79    return m_handler->canInsertDTMF();
80}
81
82MediaStreamTrack* RTCDTMFSender::track() const
83{
84    return m_track.get();
85}
86
87String RTCDTMFSender::toneBuffer() const
88{
89    return m_handler->currentToneBuffer();
90}
91
92void RTCDTMFSender::insertDTMF(const String& tones, ExceptionCode& ec)
93{
94    insertDTMF(tones, defaultToneDurationMs, defaultInterToneGapMs, ec);
95}
96
97void RTCDTMFSender::insertDTMF(const String& tones, long duration, ExceptionCode& ec)
98{
99    insertDTMF(tones, duration, defaultInterToneGapMs, ec);
100}
101
102void RTCDTMFSender::insertDTMF(const String& tones, long duration, long interToneGap, ExceptionCode& ec)
103{
104    if (!canInsertDTMF()) {
105        ec = NOT_SUPPORTED_ERR;
106        return;
107    }
108
109    if (duration > maxToneDurationMs || duration < minToneDurationMs) {
110        ec = SYNTAX_ERR;
111        return;
112    }
113
114    if (interToneGap < minInterToneGapMs) {
115        ec = SYNTAX_ERR;
116        return;
117    }
118
119    m_duration = duration;
120    m_interToneGap = interToneGap;
121
122    if (!m_handler->insertDTMF(tones, m_duration, m_interToneGap))
123        ec = SYNTAX_ERR;
124}
125
126void RTCDTMFSender::didPlayTone(const String& tone)
127{
128    scheduleDispatchEvent(RTCDTMFToneChangeEvent::create(tone));
129}
130
131const AtomicString& RTCDTMFSender::interfaceName() const
132{
133    return eventNames().interfaceForRTCDTMFSender;
134}
135
136ScriptExecutionContext* RTCDTMFSender::scriptExecutionContext() const
137{
138    return ActiveDOMObject::scriptExecutionContext();
139}
140
141void RTCDTMFSender::stop()
142{
143    m_stopped = true;
144    m_handler->setClient(0);
145}
146
147EventTargetData* RTCDTMFSender::eventTargetData()
148{
149    return &m_eventTargetData;
150}
151
152EventTargetData* RTCDTMFSender::ensureEventTargetData()
153{
154    return &m_eventTargetData;
155}
156
157void RTCDTMFSender::scheduleDispatchEvent(PassRefPtr<Event> event)
158{
159    m_scheduledEvents.append(event);
160
161    if (!m_scheduledEventTimer.isActive())
162        m_scheduledEventTimer.startOneShot(0);
163}
164
165void RTCDTMFSender::scheduledEventTimerFired(Timer<RTCDTMFSender>*)
166{
167    if (m_stopped)
168        return;
169
170    Vector<RefPtr<Event> > events;
171    events.swap(m_scheduledEvents);
172
173    Vector<RefPtr<Event> >::iterator it = events.begin();
174    for (; it != events.end(); ++it)
175        dispatchEvent((*it).release());
176}
177
178} // namespace WebCore
179
180#endif // ENABLE(MEDIA_STREAM)
181