1/*
2 * Copyright (C) 2017-2019 Apple Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted, provided that the following conditions
6 * are required to be met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of Apple Inc. nor the names of
14 * its contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. AND ITS CONTRIBUTORS BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "config.h"
30#include "RealtimeOutgoingAudioSource.h"
31
32#if USE(LIBWEBRTC)
33
34#include "LibWebRTCAudioFormat.h"
35#include "LibWebRTCProvider.h"
36#include "Logging.h"
37#include <wtf/CryptographicallyRandomNumber.h>
38
39namespace WebCore {
40
41RealtimeOutgoingAudioSource::RealtimeOutgoingAudioSource(Ref<MediaStreamTrackPrivate>&& source)
42 : m_audioSource(WTFMove(source))
43#if !RELEASE_LOG_DISABLED
44 , m_logger(m_audioSource->logger())
45 , m_logIdentifier(m_audioSource->logIdentifier())
46#endif
47{
48}
49
50RealtimeOutgoingAudioSource::~RealtimeOutgoingAudioSource()
51{
52 ASSERT(m_sinks.isEmpty());
53 stop();
54}
55
56void RealtimeOutgoingAudioSource::observeSource()
57{
58 m_audioSource->addObserver(*this);
59 initializeConverter();
60}
61
62void RealtimeOutgoingAudioSource::unobserveSource()
63{
64 m_audioSource->removeObserver(*this);
65}
66
67bool RealtimeOutgoingAudioSource::setSource(Ref<MediaStreamTrackPrivate>&& newSource)
68{
69 auto locker = holdLock(m_sinksLock);
70 bool hasSinks = !m_sinks.isEmpty();
71
72 if (hasSinks)
73 unobserveSource();
74 m_audioSource = WTFMove(newSource);
75 if (hasSinks)
76 observeSource();
77
78 return true;
79}
80
81void RealtimeOutgoingAudioSource::initializeConverter()
82{
83 m_muted = m_audioSource->muted();
84 m_enabled = m_audioSource->enabled();
85}
86
87void RealtimeOutgoingAudioSource::sourceMutedChanged()
88{
89 m_muted = m_audioSource->muted();
90}
91
92void RealtimeOutgoingAudioSource::sourceEnabledChanged()
93{
94 m_enabled = m_audioSource->enabled();
95}
96
97void RealtimeOutgoingAudioSource::AddSink(webrtc::AudioTrackSinkInterface* sink)
98{
99 {
100 auto locker = holdLock(m_sinksLock);
101 if (!m_sinks.add(sink) || m_sinks.size() != 1)
102 return;
103 }
104
105 callOnMainThread([protectedThis = makeRef(*this)]() {
106 protectedThis->observeSource();
107 });
108}
109
110void RealtimeOutgoingAudioSource::RemoveSink(webrtc::AudioTrackSinkInterface* sink)
111{
112 {
113 auto locker = holdLock(m_sinksLock);
114 if (!m_sinks.remove(sink) || !m_sinks.isEmpty())
115 return;
116 }
117
118 unobserveSource();
119}
120
121void RealtimeOutgoingAudioSource::sendAudioFrames(const void* audioData, int bitsPerSample, int sampleRate, size_t numberOfChannels, size_t numberOfFrames)
122{
123#if !RELEASE_LOG_DISABLED
124 if (!(++m_chunksSent % 200))
125 ALWAYS_LOG(LOGIDENTIFIER, "chunk ", m_chunksSent);
126#endif
127
128 auto locker = holdLock(m_sinksLock);
129 for (auto sink : m_sinks)
130 sink->OnData(audioData, bitsPerSample, sampleRate, numberOfChannels, numberOfFrames);
131}
132
133#if !RELEASE_LOG_DISABLED
134WTFLogChannel& RealtimeOutgoingAudioSource::logChannel() const
135{
136 return LogWebRTC;
137}
138#endif
139
140} // namespace WebCore
141
142#endif // USE(LIBWEBRTC)
143