android_media_ToneGenerator.cpp revision b3db213eb55acb661e4b9ea40bcc00af4b76fab9 
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: %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