1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "jni.h" 20 21 #include <memory.h> 22 23 #include <system/audio.h> 24 25 namespace android { 26 27 class JNIAudioAttributeHelper 28 { 29 public: 30 struct FreeDeleter { operatorFreeDeleter31 void operator()(void *p) const { ::free(p); } 32 }; 33 34 using UniqueAaPtr = std::unique_ptr<audio_attributes_t, FreeDeleter>; 35 36 /** 37 * @brief makeUnique helper to prevent leak 38 * @return a unique ptr of 0-initialized native audio attributes structure 39 */ 40 static UniqueAaPtr makeUnique(); 41 42 /** 43 * @brief nativeFromJava Gets the underlying AudioAttributes from an AudioAttributes Java 44 * object. 45 * @param env 46 * @param jAudioAttributes JAVA AudioAttribute object 47 * @param paa native AudioAttribute pointer 48 * @return AUDIO_JAVA_SUCCESS on success, error code otherwise 49 */ 50 static jint nativeFromJava( 51 JNIEnv* env, jobject jAudioAttributes, audio_attributes_t *attributes); 52 53 /** 54 * @brief nativeToJava AudioAttributes Java object from a native AudioAttributes. 55 * @param env 56 * @param jAudioAttributes JAVA AudioAttribute object 57 * @param attributes native AudioAttribute 58 * @return AUDIO_JAVA_SUCCESS on success, error code otherwise 59 */ 60 static jint nativeToJava( 61 JNIEnv* env, jobject *jAudioAttributes, const audio_attributes_t &attributes); 62 63 /** 64 * @brief getJavaArray: creates an array of JAVA AudioAttributes objects 65 * @param env 66 * @param jAudioAttributeArray 67 * @param numAudioAttributes 68 * @return Array of AudioAttributes objects 69 */ 70 static jint getJavaArray( 71 JNIEnv* env, jobjectArray *jAudioAttributeArray, jint numAudioAttributes); 72 }; 73 74 }; // namespace android 75