android_media_ToneGenerator.cpp revision 075e9a19ce645752f8282bc19c91b25978a7dc52
1/* 2 ** 3 ** Copyright 2008, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18#define LOG_TAG "ToneGenerator" 19 20#include <stdio.h> 21#include <unistd.h> 22#include <fcntl.h> 23 24#include <jni.h> 25#include <JNIHelp.h> 26#include <android_runtime/AndroidRuntime.h> 27 28#include <utils/Log.h> 29#include <media/AudioSystem.h> 30#include <media/ToneGenerator.h> 31 32// ---------------------------------------------------------------------------- 33 34using namespace android; 35 36struct fields_t { 37 jfieldID context; 38}; 39static fields_t fields; 40 41static jboolean android_media_ToneGenerator_startTone(JNIEnv *env, jobject thiz, jint toneType, jint durationMs) { 42 ALOGV("android_media_ToneGenerator_startTone: %p", thiz); 43 44 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz, 45 fields.context); 46 if (lpToneGen == NULL) { 47 jniThrowRuntimeException(env, "Method called after release()"); 48 return false; 49 } 50 51 return lpToneGen->startTone((ToneGenerator::tone_type) toneType, durationMs); 52} 53 54static void android_media_ToneGenerator_stopTone(JNIEnv *env, jobject thiz) { 55 ALOGV("android_media_ToneGenerator_stopTone: %p", thiz); 56 57 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz, 58 fields.context); 59 60 ALOGV("ToneGenerator lpToneGen: %p", lpToneGen); 61 if (lpToneGen == NULL) { 62 jniThrowRuntimeException(env, "Method called after release()"); 63 return; 64 } 65 lpToneGen->stopTone(); 66} 67 68static jint android_media_ToneGenerator_getAudioSessionId(JNIEnv *env, jobject thiz) { 69 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz, 70 fields.context); 71 if (lpToneGen == NULL) { 72 jniThrowRuntimeException(env, "Method called after release()"); 73 return 0; 74 } 75 return lpToneGen->getSessionId(); 76} 77 78static void android_media_ToneGenerator_release(JNIEnv *env, jobject thiz) { 79 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz, 80 fields.context); 81 ALOGV("android_media_ToneGenerator_release lpToneGen: %p", lpToneGen); 82 83 env->SetLongField(thiz, fields.context, 0); 84 85 delete lpToneGen; 86} 87 88static void android_media_ToneGenerator_native_setup(JNIEnv *env, jobject thiz, 89 jint streamType, jint volume) { 90 ToneGenerator *lpToneGen = new ToneGenerator((audio_stream_type_t) streamType, AudioSystem::linearToLog(volume), true); 91 92 env->SetLongField(thiz, fields.context, 0); 93 94 ALOGV("android_media_ToneGenerator_native_setup jobject: %p", thiz); 95 96 ALOGV("ToneGenerator lpToneGen: %p", lpToneGen); 97 98 if (!lpToneGen->isInited()) { 99 ALOGE("ToneGenerator init failed"); 100 jniThrowRuntimeException(env, "Init failed"); 101 delete lpToneGen; 102 return; 103 } 104 105 // Stow our new C++ ToneGenerator in an opaque field in the Java object. 106 env->SetLongField(thiz, fields.context, (jlong)lpToneGen); 107 108 ALOGV("ToneGenerator fields.context: %p", (void*) env->GetLongField(thiz, fields.context)); 109} 110 111static void android_media_ToneGenerator_native_finalize(JNIEnv *env, 112 jobject thiz) { 113 ALOGV("android_media_ToneGenerator_native_finalize jobject: %p", thiz); 114 115 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz, 116 fields.context); 117 118 if (lpToneGen != NULL) { 119 ALOGV("delete lpToneGen: %p", lpToneGen); 120 delete lpToneGen; 121 } 122} 123 124// ---------------------------------------------------------------------------- 125 126static JNINativeMethod gMethods[] = { 127 { "startTone", "(II)Z", (void *)android_media_ToneGenerator_startTone }, 128 { "stopTone", "()V", (void *)android_media_ToneGenerator_stopTone }, 129 { "getAudioSessionId", "()I", (void *)android_media_ToneGenerator_getAudioSessionId}, 130 { "release", "()V", (void *)android_media_ToneGenerator_release }, 131 { "native_setup", "(II)V", (void *)android_media_ToneGenerator_native_setup }, 132 { "native_finalize", "()V", (void *)android_media_ToneGenerator_native_finalize } 133}; 134 135 136int register_android_media_ToneGenerator(JNIEnv *env) { 137 jclass clazz; 138 139 clazz = env->FindClass("android/media/ToneGenerator"); 140 if (clazz == NULL) { 141 ALOGE("Can't find %s", "android/media/ToneGenerator"); 142 return -1; 143 } 144 145 fields.context = env->GetFieldID(clazz, "mNativeContext", "J"); 146 if (fields.context == NULL) { 147 ALOGE("Can't find ToneGenerator.mNativeContext"); 148 return -1; 149 } 150 ALOGV("register_android_media_ToneGenerator ToneGenerator fields.context: %p", fields.context); 151 152 return AndroidRuntime::registerNativeMethods(env, 153 "android/media/ToneGenerator", gMethods, NELEM(gMethods)); 154} 155