42f96d53f3
The existing unity plugin (an example in webrtc codebase) does not support camera access on Android platform. This CL implements such functionality. TBR=gyzhou@chromium.org BUG=webrtc:8067 Review-Url: https://codereview.webrtc.org/2993273002 Cr-Commit-Position: refs/heads/master@{#19277}
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/*
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* Copyright 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/examples/unityplugin/classreferenceholder.h"
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#include <utility>
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#include "webrtc/sdk/android/src/jni/jni_helpers.h"
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namespace unity_plugin {
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// ClassReferenceHolder holds global reference to Java classes in app/webrtc.
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class ClassReferenceHolder {
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public:
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explicit ClassReferenceHolder(JNIEnv* jni);
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~ClassReferenceHolder();
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void FreeReferences(JNIEnv* jni);
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jclass GetClass(const std::string& name);
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void LoadClass(JNIEnv* jni, const std::string& name);
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private:
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std::map<std::string, jclass> classes_;
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};
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// Allocated in LoadGlobalClassReferenceHolder(),
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// freed in FreeGlobalClassReferenceHolder().
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static ClassReferenceHolder* g_class_reference_holder = nullptr;
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void LoadGlobalClassReferenceHolder() {
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RTC_CHECK(g_class_reference_holder == nullptr);
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g_class_reference_holder = new ClassReferenceHolder(webrtc_jni::GetEnv());
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}
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void FreeGlobalClassReferenceHolder() {
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g_class_reference_holder->FreeReferences(
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webrtc_jni::AttachCurrentThreadIfNeeded());
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delete g_class_reference_holder;
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g_class_reference_holder = nullptr;
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}
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ClassReferenceHolder::ClassReferenceHolder(JNIEnv* jni) {
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LoadClass(jni, "org/webrtc/UnityUtility");
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}
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ClassReferenceHolder::~ClassReferenceHolder() {
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RTC_CHECK(classes_.empty()) << "Must call FreeReferences() before dtor!";
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}
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void ClassReferenceHolder::FreeReferences(JNIEnv* jni) {
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for (std::map<std::string, jclass>::const_iterator it = classes_.begin();
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it != classes_.end(); ++it) {
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jni->DeleteGlobalRef(it->second);
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}
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classes_.clear();
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}
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jclass ClassReferenceHolder::GetClass(const std::string& name) {
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std::map<std::string, jclass>::iterator it = classes_.find(name);
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RTC_CHECK(it != classes_.end()) << "Unexpected GetClass() call for: " << name;
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return it->second;
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}
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void ClassReferenceHolder::LoadClass(JNIEnv* jni, const std::string& name) {
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jclass localRef = jni->FindClass(name.c_str());
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CHECK_EXCEPTION(jni) << "error during FindClass: " << name;
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RTC_CHECK(localRef) << name;
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jclass globalRef = reinterpret_cast<jclass>(jni->NewGlobalRef(localRef));
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CHECK_EXCEPTION(jni) << "error during NewGlobalRef: " << name;
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RTC_CHECK(globalRef) << name;
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bool inserted = classes_.insert(std::make_pair(name, globalRef)).second;
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RTC_CHECK(inserted) << "Duplicate class name: " << name;
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}
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// Returns a global reference guaranteed to be valid for the lifetime of the
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// process.
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jclass FindClass(JNIEnv* jni, const char* name) {
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return g_class_reference_holder->GetClass(name);
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}
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} // namespace unity_plugin
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