android_media_ToneGenerator.cpp revision 1137be1a686fdfc9f02c3aca7c33f28006df4742
1/* //device/libs/android_runtime/android_media_AudioSystem.cpp 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: %x", (int)thiz); 43 44 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetIntField(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: %x", (int)thiz); 56 57 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetIntField(thiz, 58 fields.context); 59 60 ALOGV("ToneGenerator lpToneGen: %x", (unsigned int)lpToneGen); 61 if (lpToneGen == NULL) { 62 jniThrowRuntimeException(env, "Method called after release()"); 63 return; 64 } 65 lpToneGen->stopTone(); 66} 67 68static void android_media_ToneGenerator_release(JNIEnv *env, jobject thiz) { 69 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetIntField(thiz, 70 fields.context); 71 ALOGV("android_media_ToneGenerator_release lpToneGen: %x", (int)lpToneGen); 72 73 env->SetIntField(thiz, fields.context, 0); 74 75 delete lpToneGen; 76} 77 78static void android_media_ToneGenerator_native_setup(JNIEnv *env, jobject thiz, 79 jint streamType, jint volume) { 80 ToneGenerator *lpToneGen = new ToneGenerator((audio_stream_type_t) streamType, AudioSystem::linearToLog(volume), true); 81 82 env->SetIntField(thiz, fields.context, 0); 83 84 ALOGV("android_media_ToneGenerator_native_setup jobject: %x", (int)thiz); 85 86 if (lpToneGen == NULL) { 87 ALOGE("ToneGenerator creation failed"); 88 jniThrowException(env, "java/lang/OutOfMemoryError", NULL); 89 return; 90 } 91 ALOGV("ToneGenerator lpToneGen: %x", (unsigned int)lpToneGen); 92 93 if (!lpToneGen->isInited()) { 94 ALOGE("ToneGenerator init failed"); 95 jniThrowRuntimeException(env, "Init failed"); 96 return; 97 } 98 99 // Stow our new C++ ToneGenerator in an opaque field in the Java object. 100 env->SetIntField(thiz, fields.context, (int)lpToneGen); 101 102 ALOGV("ToneGenerator fields.context: %x", env->GetIntField(thiz, fields.context)); 103} 104 105static void android_media_ToneGenerator_native_finalize(JNIEnv *env, 106 jobject thiz) { 107 ALOGV("android_media_ToneGenerator_native_finalize jobject: %x", (int)thiz); 108 109 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetIntField(thiz, 110 fields.context); 111 112 if (lpToneGen != NULL) { 113 ALOGV("delete lpToneGen: %p", lpToneGen); 114 delete lpToneGen; 115 } 116} 117 118// ---------------------------------------------------------------------------- 119 120static JNINativeMethod gMethods[] = { 121 { "startTone", "(II)Z", (void *)android_media_ToneGenerator_startTone }, 122 { "stopTone", "()V", (void *)android_media_ToneGenerator_stopTone }, 123 { "release", "()V", (void *)android_media_ToneGenerator_release }, 124 { "native_setup", "(II)V", (void *)android_media_ToneGenerator_native_setup }, 125 { "native_finalize", "()V", (void *)android_media_ToneGenerator_native_finalize } 126}; 127 128 129int register_android_media_ToneGenerator(JNIEnv *env) { 130 jclass clazz; 131 132 clazz = env->FindClass("android/media/ToneGenerator"); 133 if (clazz == NULL) { 134 ALOGE("Can't find %s", "android/media/ToneGenerator"); 135 return -1; 136 } 137 138 fields.context = env->GetFieldID(clazz, "mNativeContext", "I"); 139 if (fields.context == NULL) { 140 ALOGE("Can't find ToneGenerator.mNativeContext"); 141 return -1; 142 } 143 ALOGV("register_android_media_ToneGenerator ToneGenerator fields.context: %x", (unsigned int)fields.context); 144 145 return AndroidRuntime::registerNativeMethods(env, 146 "android/media/ToneGenerator", gMethods, NELEM(gMethods)); 147} 148