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 <nativehelper/JNIHelp.h>
26 #include <nativehelper/ScopedUtfChars.h>
27 #include "core_jni_helpers.h"
28
29 #include <utils/Log.h>
30 #include <media/AudioSystem.h>
31 #include <media/ToneGenerator.h>
32
33 // ----------------------------------------------------------------------------
34
35 using namespace android;
36
37 struct fields_t {
38 jfieldID context;
39 };
40 static fields_t fields;
41
android_media_ToneGenerator_startTone(JNIEnv * env,jobject thiz,jint toneType,jint durationMs)42 static jboolean android_media_ToneGenerator_startTone(JNIEnv *env, jobject thiz, jint toneType, jint durationMs) {
43 ALOGV("android_media_ToneGenerator_startTone: %p", thiz);
44
45 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz,
46 fields.context);
47 if (lpToneGen == NULL) {
48 jniThrowRuntimeException(env, "Method called after release()");
49 return false;
50 }
51
52 return lpToneGen->startTone((ToneGenerator::tone_type) toneType, durationMs);
53 }
54
android_media_ToneGenerator_stopTone(JNIEnv * env,jobject thiz)55 static void android_media_ToneGenerator_stopTone(JNIEnv *env, jobject thiz) {
56 ALOGV("android_media_ToneGenerator_stopTone: %p", thiz);
57
58 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz,
59 fields.context);
60
61 ALOGV("ToneGenerator lpToneGen: %p", lpToneGen);
62 if (lpToneGen == NULL) {
63 jniThrowRuntimeException(env, "Method called after release()");
64 return;
65 }
66 lpToneGen->stopTone();
67 }
68
android_media_ToneGenerator_getAudioSessionId(JNIEnv * env,jobject thiz)69 static jint android_media_ToneGenerator_getAudioSessionId(JNIEnv *env, jobject thiz) {
70 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz,
71 fields.context);
72 if (lpToneGen == NULL) {
73 jniThrowRuntimeException(env, "Method called after release()");
74 return 0;
75 }
76 return lpToneGen->getSessionId();
77 }
78
android_media_ToneGenerator_release(JNIEnv * env,jobject thiz)79 static void android_media_ToneGenerator_release(JNIEnv *env, jobject thiz) {
80 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz,
81 fields.context);
82 ALOGV("android_media_ToneGenerator_release lpToneGen: %p", lpToneGen);
83
84 env->SetLongField(thiz, fields.context, 0);
85
86 delete lpToneGen;
87 }
88
android_media_ToneGenerator_native_setup(JNIEnv * env,jobject thiz,jint streamType,jint volume,jstring opPackageName)89 static void android_media_ToneGenerator_native_setup(JNIEnv *env, jobject thiz, jint streamType,
90 jint volume, jstring opPackageName) {
91 ScopedUtfChars opPackageNameStr(env, opPackageName);
92 ToneGenerator *lpToneGen =
93 new ToneGenerator((audio_stream_type_t)streamType, AudioSystem::linearToLog(volume),
94 true /*threadCanCallJava*/, opPackageNameStr.c_str());
95
96 env->SetLongField(thiz, fields.context, 0);
97
98 ALOGV("android_media_ToneGenerator_native_setup jobject: %p", thiz);
99
100 ALOGV("ToneGenerator lpToneGen: %p", lpToneGen);
101
102 if (!lpToneGen->isInited()) {
103 ALOGE("ToneGenerator init failed");
104 jniThrowRuntimeException(env, "Init failed");
105 delete lpToneGen;
106 return;
107 }
108
109 // Stow our new C++ ToneGenerator in an opaque field in the Java object.
110 env->SetLongField(thiz, fields.context, (jlong)lpToneGen);
111
112 ALOGV("ToneGenerator fields.context: %p", (void*) env->GetLongField(thiz, fields.context));
113 }
114
android_media_ToneGenerator_native_finalize(JNIEnv * env,jobject thiz)115 static void android_media_ToneGenerator_native_finalize(JNIEnv *env,
116 jobject thiz) {
117 ALOGV("android_media_ToneGenerator_native_finalize jobject: %p", thiz);
118
119 ToneGenerator *lpToneGen = (ToneGenerator *)env->GetLongField(thiz,
120 fields.context);
121
122 if (lpToneGen != NULL) {
123 ALOGV("delete lpToneGen: %p", lpToneGen);
124 delete lpToneGen;
125 }
126 }
127
128 // ----------------------------------------------------------------------------
129
130 static const JNINativeMethod gMethods[] =
131 {{"startTone", "(II)Z", (void *)android_media_ToneGenerator_startTone},
132 {"stopTone", "()V", (void *)android_media_ToneGenerator_stopTone},
133 {"getAudioSessionId", "()I", (void *)android_media_ToneGenerator_getAudioSessionId},
134 {"release", "()V", (void *)android_media_ToneGenerator_release},
135 {"native_setup", "(IILjava/lang/String;)V",
136 (void *)android_media_ToneGenerator_native_setup},
137 {"native_finalize", "()V", (void *)android_media_ToneGenerator_native_finalize}};
138
register_android_media_ToneGenerator(JNIEnv * env)139 int register_android_media_ToneGenerator(JNIEnv *env) {
140 jclass clazz = FindClassOrDie(env, "android/media/ToneGenerator");
141
142 fields.context = GetFieldIDOrDie(env, clazz, "mNativeContext", "J");
143 ALOGV("register_android_media_ToneGenerator ToneGenerator fields.context: %p", fields.context);
144
145 return RegisterMethodsOrDie(env, "android/media/ToneGenerator", gMethods, NELEM(gMethods));
146 }
147