1/*
2 * Copyright (C) 2018 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 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 APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#pragma once
26
27#if ENABLE(WEB_RTC)
28
29#include "LibWebRTCMacros.h"
30#include "LibWebRTCPeerConnectionBackend.h"
31#include "RTCRtpSenderBackend.h"
32#include "RealtimeOutgoingAudioSource.h"
33#include "RealtimeOutgoingVideoSource.h"
34#include <wtf/WeakPtr.h>
35
36ALLOW_UNUSED_PARAMETERS_BEGIN
37
38#include <webrtc/api/rtpsenderinterface.h>
39#include <webrtc/rtc_base/scoped_ref_ptr.h>
40
41ALLOW_UNUSED_PARAMETERS_END
42
43namespace WebCore {
44
45class LibWebRTCPeerConnectionBackend;
46
47class LibWebRTCRtpSenderBackend final : public RTCRtpSenderBackend {
48 WTF_MAKE_FAST_ALLOCATED;
49public:
50 LibWebRTCRtpSenderBackend(LibWebRTCPeerConnectionBackend& backend, rtc::scoped_refptr<webrtc::RtpSenderInterface>&& rtcSender)
51 : m_peerConnectionBackend(makeWeakPtr(&backend))
52 , m_rtcSender(WTFMove(rtcSender))
53 {
54 }
55
56 using Source = Variant<std::nullptr_t, Ref<RealtimeOutgoingAudioSource>, Ref<RealtimeOutgoingVideoSource>>;
57 LibWebRTCRtpSenderBackend(LibWebRTCPeerConnectionBackend& backend, rtc::scoped_refptr<webrtc::RtpSenderInterface>&& rtcSender, Source&& source)
58 : m_peerConnectionBackend(makeWeakPtr(&backend))
59 , m_rtcSender(WTFMove(rtcSender))
60 , m_source(WTFMove(source))
61 {
62 }
63
64 void setRTCSender(rtc::scoped_refptr<webrtc::RtpSenderInterface>&& rtcSender) { m_rtcSender = WTFMove(rtcSender); }
65 webrtc::RtpSenderInterface* rtcSender() { return m_rtcSender.get(); }
66
67 RealtimeOutgoingAudioSource* audioSource()
68 {
69 return WTF::switchOn(m_source,
70 [] (Ref<RealtimeOutgoingAudioSource>& source) { return source.ptr(); },
71 [] (const auto&) -> RealtimeOutgoingAudioSource* { return nullptr; }
72 );
73 }
74
75 RealtimeOutgoingVideoSource* videoSource()
76 {
77 return WTF::switchOn(m_source,
78 [] (Ref<RealtimeOutgoingVideoSource>& source) { return source.ptr(); },
79 [] (const auto&) -> RealtimeOutgoingVideoSource* { return nullptr; }
80 );
81 }
82
83 bool hasSource() const
84 {
85 return WTF::switchOn(m_source,
86 [] (const std::nullptr_t&) { return false; },
87 [] (const auto&) { return true; }
88 );
89 }
90
91 void clearSource()
92 {
93 ASSERT(hasSource());
94 m_source = nullptr;
95 }
96
97 void setSource(Source&& source)
98 {
99 ASSERT(!hasSource());
100 m_source = WTFMove(source);
101 ASSERT(hasSource());
102 }
103
104 void takeSource(LibWebRTCRtpSenderBackend& backend)
105 {
106 ASSERT(backend.hasSource());
107 setSource(WTFMove(backend.m_source));
108 }
109
110private:
111 void replaceTrack(ScriptExecutionContext&, RTCRtpSender&, RefPtr<MediaStreamTrack>&&, DOMPromiseDeferred<void>&&) final;
112 RTCRtpSendParameters getParameters() const final;
113 void setParameters(const RTCRtpSendParameters&, DOMPromiseDeferred<void>&&) final;
114
115 WeakPtr<LibWebRTCPeerConnectionBackend> m_peerConnectionBackend;
116 rtc::scoped_refptr<webrtc::RtpSenderInterface> m_rtcSender;
117 Source m_source;
118 mutable Optional<webrtc::RtpParameters> m_currentParameters;
119};
120
121} // namespace WebCore
122
123#endif // ENABLE(WEB_RTC)
124