1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * Copyright (C) 2013 Apple Inc. All rights reserved. 4 * Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies). 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer 14 * in the documentation and/or other materials provided with the 15 * distribution. 16 * 3. Neither the name of Google Inc. nor the names of its contributors 17 * may be used to endorse or promote products derived from this 18 * software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#include "config.h" 34 35#if ENABLE(MEDIA_STREAM) 36 37#include "MediaStreamSource.h" 38 39#include "MediaStreamCenter.h" 40#include "MediaStreamSourceCapabilities.h" 41#include "UUID.h" 42 43namespace WebCore { 44 45MediaStreamSource::MediaStreamSource(const String& id, Type type, const String& name) 46 : m_id(id) 47 , m_type(type) 48 , m_name(name) 49 , m_readyState(New) 50 , m_enabled(true) 51 , m_muted(false) 52 , m_readonly(false) 53 , m_remote(false) 54{ 55 if (!m_id.isEmpty()) 56 return; 57 58 m_id = createCanonicalUUIDString(); 59} 60 61void MediaStreamSource::reset() 62{ 63 m_readyState = New; 64 m_enabled = true; 65 m_muted = false; 66 m_readonly = false; 67 m_remote = false; 68} 69 70void MediaStreamSource::setReadyState(ReadyState readyState) 71{ 72 if (m_readyState == Ended || m_readyState == readyState) 73 return; 74 75 m_readyState = readyState; 76 for (auto observer = m_observers.begin(); observer != m_observers.end(); ++observer) 77 (*observer)->sourceReadyStateChanged(); 78 79 if (m_readyState == Live) { 80 startProducingData(); 81 return; 82 } 83 84 // There are no more consumers of this source's data, shut it down as appropriate. 85 if (m_readyState == Ended) 86 stopProducingData(); 87} 88 89void MediaStreamSource::addObserver(MediaStreamSource::Observer* observer) 90{ 91 m_observers.append(observer); 92} 93 94void MediaStreamSource::removeObserver(MediaStreamSource::Observer* observer) 95{ 96 size_t pos = m_observers.find(observer); 97 if (pos != notFound) 98 m_observers.remove(pos); 99 100 if (!m_observers.size()) 101 stop(); 102} 103 104void MediaStreamSource::setMuted(bool muted) 105{ 106 if (m_muted == muted) 107 return; 108 109 m_muted = muted; 110 111 if (m_readyState == Ended) 112 return; 113 114 for (auto observer = m_observers.begin(); observer != m_observers.end(); ++observer) 115 (*observer)->sourceMutedChanged(); 116} 117 118void MediaStreamSource::setEnabled(bool enabled) 119{ 120 if (!enabled) { 121 // Don't disable the source unless all observers are disabled. 122 for (auto observer = m_observers.begin(); observer != m_observers.end(); ++observer) { 123 if ((*observer)->observerIsEnabled()) 124 return; 125 } 126 } 127 128 if (m_enabled == enabled) 129 return; 130 131 m_enabled = enabled; 132 133 if (m_readyState == Ended) 134 return; 135 136 if (!enabled) 137 stopProducingData(); 138 else 139 startProducingData(); 140 141 for (auto observer = m_observers.begin(); observer != m_observers.end(); ++observer) 142 (*observer)->sourceEnabledChanged(); 143} 144 145bool MediaStreamSource::readonly() const 146{ 147 return m_readonly; 148} 149 150void MediaStreamSource::stop() 151{ 152 // This is called from the track.stop() method, which should "Permanently stop the generation of data 153 // for track's source", so go straight to ended. This will notify any other tracks using this source 154 // that it is no longer available. 155 setReadyState(Ended); 156} 157 158} // namespace WebCore 159 160#endif // ENABLE(MEDIA_STREAM) 161