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/*
* 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_t|
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_
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