| /* |
| * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_EXAMPLES_ANDROID_MEDIA_DEMO_JNI_JNI_HELPERS_H_ |
| #define WEBRTC_EXAMPLES_ANDROID_MEDIA_DEMO_JNI_JNI_HELPERS_H_ |
| |
| // TODO(henrike): this file contains duplication with regards to |
| // talk/app/webrtc/java/jni/peerconnection_jni.cc. When/if code can be shared |
| // between trunk/talk and trunk/webrtc remove the duplication. |
| |
| #include <android/log.h> |
| #include <jni.h> |
| |
| #include <assert.h> |
| #include <map> |
| #include <string> |
| |
| #define TAG "WEBRTC-NATIVE" |
| |
| // Abort the process if |x| is false, emitting |msg| to logcat. |
| #define CHECK(x, msg) \ |
| if (x) { \ |
| } else { \ |
| __android_log_print(ANDROID_LOG_ERROR, TAG, "%s:%d: %s", __FILE__, \ |
| __LINE__, msg); \ |
| assert(false); \ |
| } |
| |
| // Abort the process if |jni| has a Java exception pending, emitting |msg| to |
| // logcat. |
| #define CHECK_JNI_EXCEPTION(jni, msg) \ |
| if (0) { \ |
| } else { \ |
| if (jni->ExceptionCheck()) { \ |
| jni->ExceptionDescribe(); \ |
| jni->ExceptionClear(); \ |
| CHECK(0, msg); \ |
| } \ |
| } |
| |
| // JNIEnv-helper methods that CHECK success: no Java exception thrown and found |
| // object/class/method/field is non-null. |
| jmethodID GetMethodID(JNIEnv* jni, jclass c, const std::string& name, |
| const char* signature); |
| |
| // Return a |jlong| that will automatically convert back to |ptr| when assigned |
| // to a |uint64| |
| jlong jlongFromPointer(void* ptr); |
| |
| // Given a (UTF-16) jstring return a new UTF-8 native string. |
| std::string JavaToStdString(JNIEnv* jni, const jstring& j_string); |
| |
| // Android's FindClass() is trickier than usual because the app-specific |
| // ClassLoader is not consulted when there is no app-specific frame on the |
| // stack. Consequently, we only look up classes once in JNI_OnLoad. |
| // http://developer.android.com/training/articles/perf-jni.html#faq_FindClass |
| class ClassReferenceHolder { |
| public: |
| ClassReferenceHolder(JNIEnv* jni, const char** classes, int size); |
| ~ClassReferenceHolder(); |
| |
| void FreeReferences(JNIEnv* jni); |
| |
| jclass GetClass(const std::string& name); |
| |
| private: |
| void LoadClass(JNIEnv* jni, const std::string& name); |
| |
| std::map<std::string, jclass> classes_; |
| }; |
| |
| #endif // WEBRTC_EXAMPLES_ANDROID_MEDIA_DEMO_JNI_JNI_HELPERS_H_ |