1 /*
2 * libjingle
3 * Copyright 2015 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28 #include "talk/app/webrtc/java/jni/classreferenceholder.h"
29
30 #include "talk/app/webrtc/java/jni/jni_helpers.h"
31
32 namespace webrtc_jni {
33
34 // ClassReferenceHolder holds global reference to Java classes in app/webrtc.
35 class ClassReferenceHolder {
36 public:
37 explicit ClassReferenceHolder(JNIEnv* jni);
38 ~ClassReferenceHolder();
39
40 void FreeReferences(JNIEnv* jni);
41 jclass GetClass(const std::string& name);
42
43 private:
44 void LoadClass(JNIEnv* jni, const std::string& name);
45
46 std::map<std::string, jclass> classes_;
47 };
48
49 // Allocated in LoadGlobalClassReferenceHolder(),
50 // freed in FreeGlobalClassReferenceHolder().
51 static ClassReferenceHolder* g_class_reference_holder = nullptr;
52
LoadGlobalClassReferenceHolder()53 void LoadGlobalClassReferenceHolder() {
54 RTC_CHECK(g_class_reference_holder == nullptr);
55 g_class_reference_holder = new ClassReferenceHolder(GetEnv());
56 }
57
FreeGlobalClassReferenceHolder()58 void FreeGlobalClassReferenceHolder() {
59 g_class_reference_holder->FreeReferences(AttachCurrentThreadIfNeeded());
60 delete g_class_reference_holder;
61 g_class_reference_holder = nullptr;
62 }
63
ClassReferenceHolder(JNIEnv * jni)64 ClassReferenceHolder::ClassReferenceHolder(JNIEnv* jni) {
65 LoadClass(jni, "java/nio/ByteBuffer");
66 LoadClass(jni, "java/util/ArrayList");
67 LoadClass(jni, "org/webrtc/AudioTrack");
68 LoadClass(jni, "org/webrtc/DataChannel");
69 LoadClass(jni, "org/webrtc/DataChannel$Buffer");
70 LoadClass(jni, "org/webrtc/DataChannel$Init");
71 LoadClass(jni, "org/webrtc/DataChannel$State");
72 LoadClass(jni, "org/webrtc/IceCandidate");
73 #if defined(ANDROID) && !defined(WEBRTC_CHROMIUM_BUILD)
74 LoadClass(jni, "android/graphics/SurfaceTexture");
75 LoadClass(jni, "org/webrtc/CameraEnumerator");
76 LoadClass(jni, "org/webrtc/Camera2Enumerator");
77 LoadClass(jni, "org/webrtc/CameraEnumerationAndroid");
78 LoadClass(jni, "org/webrtc/VideoCapturerAndroid");
79 LoadClass(jni, "org/webrtc/VideoCapturerAndroid$NativeObserver");
80 LoadClass(jni, "org/webrtc/EglBase");
81 LoadClass(jni, "org/webrtc/EglBase$Context");
82 LoadClass(jni, "org/webrtc/EglBase14$Context");
83 LoadClass(jni, "org/webrtc/NetworkMonitor");
84 LoadClass(jni, "org/webrtc/MediaCodecVideoEncoder");
85 LoadClass(jni, "org/webrtc/MediaCodecVideoEncoder$OutputBufferInfo");
86 LoadClass(jni, "org/webrtc/MediaCodecVideoEncoder$VideoCodecType");
87 LoadClass(jni, "org/webrtc/MediaCodecVideoDecoder");
88 LoadClass(jni, "org/webrtc/MediaCodecVideoDecoder$DecodedTextureBuffer");
89 LoadClass(jni, "org/webrtc/MediaCodecVideoDecoder$DecodedOutputBuffer");
90 LoadClass(jni, "org/webrtc/MediaCodecVideoDecoder$VideoCodecType");
91 LoadClass(jni, "org/webrtc/SurfaceTextureHelper");
92 #endif
93 LoadClass(jni, "org/webrtc/MediaSource$State");
94 LoadClass(jni, "org/webrtc/MediaStream");
95 LoadClass(jni, "org/webrtc/MediaStreamTrack$State");
96 LoadClass(jni, "org/webrtc/PeerConnectionFactory");
97 LoadClass(jni, "org/webrtc/PeerConnection$BundlePolicy");
98 LoadClass(jni, "org/webrtc/PeerConnection$ContinualGatheringPolicy");
99 LoadClass(jni, "org/webrtc/PeerConnection$RtcpMuxPolicy");
100 LoadClass(jni, "org/webrtc/PeerConnection$IceConnectionState");
101 LoadClass(jni, "org/webrtc/PeerConnection$IceGatheringState");
102 LoadClass(jni, "org/webrtc/PeerConnection$IceTransportsType");
103 LoadClass(jni, "org/webrtc/PeerConnection$TcpCandidatePolicy");
104 LoadClass(jni, "org/webrtc/PeerConnection$KeyType");
105 LoadClass(jni, "org/webrtc/PeerConnection$SignalingState");
106 LoadClass(jni, "org/webrtc/RtpReceiver");
107 LoadClass(jni, "org/webrtc/RtpSender");
108 LoadClass(jni, "org/webrtc/SessionDescription");
109 LoadClass(jni, "org/webrtc/SessionDescription$Type");
110 LoadClass(jni, "org/webrtc/StatsReport");
111 LoadClass(jni, "org/webrtc/StatsReport$Value");
112 LoadClass(jni, "org/webrtc/VideoRenderer$I420Frame");
113 LoadClass(jni, "org/webrtc/VideoCapturer");
114 LoadClass(jni, "org/webrtc/VideoTrack");
115 }
116
~ClassReferenceHolder()117 ClassReferenceHolder::~ClassReferenceHolder() {
118 RTC_CHECK(classes_.empty()) << "Must call FreeReferences() before dtor!";
119 }
120
FreeReferences(JNIEnv * jni)121 void ClassReferenceHolder::FreeReferences(JNIEnv* jni) {
122 for (std::map<std::string, jclass>::const_iterator it = classes_.begin();
123 it != classes_.end(); ++it) {
124 jni->DeleteGlobalRef(it->second);
125 }
126 classes_.clear();
127 }
128
GetClass(const std::string & name)129 jclass ClassReferenceHolder::GetClass(const std::string& name) {
130 std::map<std::string, jclass>::iterator it = classes_.find(name);
131 RTC_CHECK(it != classes_.end()) << "Unexpected GetClass() call for: " << name;
132 return it->second;
133 }
134
LoadClass(JNIEnv * jni,const std::string & name)135 void ClassReferenceHolder::LoadClass(JNIEnv* jni, const std::string& name) {
136 jclass localRef = jni->FindClass(name.c_str());
137 CHECK_EXCEPTION(jni) << "error during FindClass: " << name;
138 RTC_CHECK(localRef) << name;
139 jclass globalRef = reinterpret_cast<jclass>(jni->NewGlobalRef(localRef));
140 CHECK_EXCEPTION(jni) << "error during NewGlobalRef: " << name;
141 RTC_CHECK(globalRef) << name;
142 bool inserted = classes_.insert(std::make_pair(name, globalRef)).second;
143 RTC_CHECK(inserted) << "Duplicate class name: " << name;
144 }
145
146 // Returns a global reference guaranteed to be valid for the lifetime of the
147 // process.
FindClass(JNIEnv * jni,const char * name)148 jclass FindClass(JNIEnv* jni, const char* name) {
149 return g_class_reference_holder->GetClass(name);
150 }
151
152 } // namespace webrtc_jni
153