1/*
2 * Copyright (C) 2008 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#include <stdio.h>
18
19//#define LOG_NDEBUG 0
20#define LOG_TAG "SoundPool-JNI"
21
22#include <utils/Log.h>
23#include <jni.h>
24#include <nativehelper/JNIHelp.h>
25#include <android_runtime/AndroidRuntime.h>
26#include "SoundPool.h"
27
28using namespace android;
29
30static struct fields_t {
31    jfieldID    mNativeContext;
32    jmethodID   mPostEvent;
33    jclass      mSoundPoolClass;
34} fields;
35static inline SoundPool* MusterSoundPool(JNIEnv *env, jobject thiz) {
36    return (SoundPool*)env->GetLongField(thiz, fields.mNativeContext);
37}
38static const char* const kAudioAttributesClassPathName = "android/media/AudioAttributes";
39struct audio_attributes_fields_t {
40    jfieldID  fieldUsage;        // AudioAttributes.mUsage
41    jfieldID  fieldContentType;  // AudioAttributes.mContentType
42    jfieldID  fieldFlags;        // AudioAttributes.mFlags
43    jfieldID  fieldFormattedTags;// AudioAttributes.mFormattedTags
44};
45static audio_attributes_fields_t javaAudioAttrFields;
46
47// ----------------------------------------------------------------------------
48
49static jint
50android_media_SoundPool_load_FD(JNIEnv *env, jobject thiz, jobject fileDescriptor,
51        jlong offset, jlong length, jint priority)
52{
53    ALOGV("android_media_SoundPool_load_FD");
54    SoundPool *ap = MusterSoundPool(env, thiz);
55    if (ap == NULL) return 0;
56    return (jint) ap->load(jniGetFDFromFileDescriptor(env, fileDescriptor),
57            int64_t(offset), int64_t(length), int(priority));
58}
59
60static jboolean
61android_media_SoundPool_unload(JNIEnv *env, jobject thiz, jint sampleID) {
62    ALOGV("android_media_SoundPool_unload\n");
63    SoundPool *ap = MusterSoundPool(env, thiz);
64    if (ap == NULL) return JNI_FALSE;
65    return ap->unload(sampleID) ? JNI_TRUE : JNI_FALSE;
66}
67
68static jint
69android_media_SoundPool_play(JNIEnv *env, jobject thiz, jint sampleID,
70        jfloat leftVolume, jfloat rightVolume, jint priority, jint loop,
71        jfloat rate)
72{
73    ALOGV("android_media_SoundPool_play\n");
74    SoundPool *ap = MusterSoundPool(env, thiz);
75    if (ap == NULL) return 0;
76    return (jint) ap->play(sampleID, leftVolume, rightVolume, priority, loop, rate);
77}
78
79static void
80android_media_SoundPool_pause(JNIEnv *env, jobject thiz, jint channelID)
81{
82    ALOGV("android_media_SoundPool_pause");
83    SoundPool *ap = MusterSoundPool(env, thiz);
84    if (ap == NULL) return;
85    ap->pause(channelID);
86}
87
88static void
89android_media_SoundPool_resume(JNIEnv *env, jobject thiz, jint channelID)
90{
91    ALOGV("android_media_SoundPool_resume");
92    SoundPool *ap = MusterSoundPool(env, thiz);
93    if (ap == NULL) return;
94    ap->resume(channelID);
95}
96
97static void
98android_media_SoundPool_autoPause(JNIEnv *env, jobject thiz)
99{
100    ALOGV("android_media_SoundPool_autoPause");
101    SoundPool *ap = MusterSoundPool(env, thiz);
102    if (ap == NULL) return;
103    ap->autoPause();
104}
105
106static void
107android_media_SoundPool_autoResume(JNIEnv *env, jobject thiz)
108{
109    ALOGV("android_media_SoundPool_autoResume");
110    SoundPool *ap = MusterSoundPool(env, thiz);
111    if (ap == NULL) return;
112    ap->autoResume();
113}
114
115static void
116android_media_SoundPool_stop(JNIEnv *env, jobject thiz, jint channelID)
117{
118    ALOGV("android_media_SoundPool_stop");
119    SoundPool *ap = MusterSoundPool(env, thiz);
120    if (ap == NULL) return;
121    ap->stop(channelID);
122}
123
124static void
125android_media_SoundPool_setVolume(JNIEnv *env, jobject thiz, jint channelID,
126        jfloat leftVolume, jfloat rightVolume)
127{
128    ALOGV("android_media_SoundPool_setVolume");
129    SoundPool *ap = MusterSoundPool(env, thiz);
130    if (ap == NULL) return;
131    ap->setVolume(channelID, (float) leftVolume, (float) rightVolume);
132}
133
134static void
135android_media_SoundPool_mute(JNIEnv *env, jobject thiz, jboolean muting)
136{
137    ALOGV("android_media_SoundPool_mute(%d)", muting);
138    SoundPool *ap = MusterSoundPool(env, thiz);
139    if (ap == NULL) return;
140    ap->mute(muting == JNI_TRUE);
141}
142
143static void
144android_media_SoundPool_setPriority(JNIEnv *env, jobject thiz, jint channelID,
145        jint priority)
146{
147    ALOGV("android_media_SoundPool_setPriority");
148    SoundPool *ap = MusterSoundPool(env, thiz);
149    if (ap == NULL) return;
150    ap->setPriority(channelID, (int) priority);
151}
152
153static void
154android_media_SoundPool_setLoop(JNIEnv *env, jobject thiz, jint channelID,
155        int loop)
156{
157    ALOGV("android_media_SoundPool_setLoop");
158    SoundPool *ap = MusterSoundPool(env, thiz);
159    if (ap == NULL) return;
160    ap->setLoop(channelID, loop);
161}
162
163static void
164android_media_SoundPool_setRate(JNIEnv *env, jobject thiz, jint channelID,
165       jfloat rate)
166{
167    ALOGV("android_media_SoundPool_setRate");
168    SoundPool *ap = MusterSoundPool(env, thiz);
169    if (ap == NULL) return;
170    ap->setRate(channelID, (float) rate);
171}
172
173static void android_media_callback(SoundPoolEvent event, SoundPool* soundPool, void* user)
174{
175    ALOGV("callback: (%d, %d, %d, %p, %p)", event.mMsg, event.mArg1, event.mArg2, soundPool, user);
176    JNIEnv *env = AndroidRuntime::getJNIEnv();
177    env->CallStaticVoidMethod(fields.mSoundPoolClass, fields.mPostEvent, user, event.mMsg, event.mArg1, event.mArg2, NULL);
178}
179
180static jint
181android_media_SoundPool_native_setup(JNIEnv *env, jobject thiz, jobject weakRef,
182        jint maxChannels, jobject jaa)
183{
184    if (jaa == 0) {
185        ALOGE("Error creating SoundPool: invalid audio attributes");
186        return -1;
187    }
188
189    audio_attributes_t *paa = NULL;
190    // read the AudioAttributes values
191    paa = (audio_attributes_t *) calloc(1, sizeof(audio_attributes_t));
192    const jstring jtags =
193            (jstring) env->GetObjectField(jaa, javaAudioAttrFields.fieldFormattedTags);
194    const char* tags = env->GetStringUTFChars(jtags, NULL);
195    // copying array size -1, char array for tags was calloc'd, no need to NULL-terminate it
196    strncpy(paa->tags, tags, AUDIO_ATTRIBUTES_TAGS_MAX_SIZE - 1);
197    env->ReleaseStringUTFChars(jtags, tags);
198    paa->usage = (audio_usage_t) env->GetIntField(jaa, javaAudioAttrFields.fieldUsage);
199    paa->content_type =
200            (audio_content_type_t) env->GetIntField(jaa, javaAudioAttrFields.fieldContentType);
201    paa->flags = env->GetIntField(jaa, javaAudioAttrFields.fieldFlags);
202
203    ALOGV("android_media_SoundPool_native_setup");
204    SoundPool *ap = new SoundPool(maxChannels, paa);
205    if (ap == NULL) {
206        return -1;
207    }
208
209    // save pointer to SoundPool C++ object in opaque field in Java object
210    env->SetLongField(thiz, fields.mNativeContext, (jlong) ap);
211
212    // set callback with weak reference
213    jobject globalWeakRef = env->NewGlobalRef(weakRef);
214    ap->setCallback(android_media_callback, globalWeakRef);
215
216    // audio attributes were copied in SoundPool creation
217    free(paa);
218
219    return 0;
220}
221
222static void
223android_media_SoundPool_release(JNIEnv *env, jobject thiz)
224{
225    ALOGV("android_media_SoundPool_release");
226    SoundPool *ap = MusterSoundPool(env, thiz);
227    if (ap != NULL) {
228
229        // release weak reference and clear callback
230        jobject weakRef = (jobject) ap->getUserData();
231        ap->setCallback(NULL, NULL);
232        if (weakRef != NULL) {
233            env->DeleteGlobalRef(weakRef);
234        }
235
236        // clear native context
237        env->SetLongField(thiz, fields.mNativeContext, 0);
238        delete ap;
239    }
240}
241
242// ----------------------------------------------------------------------------
243
244// Dalvik VM type signatures
245static JNINativeMethod gMethods[] = {
246    {   "_load",
247        "(Ljava/io/FileDescriptor;JJI)I",
248        (void *)android_media_SoundPool_load_FD
249    },
250    {   "unload",
251        "(I)Z",
252        (void *)android_media_SoundPool_unload
253    },
254    {   "_play",
255        "(IFFIIF)I",
256        (void *)android_media_SoundPool_play
257    },
258    {   "pause",
259        "(I)V",
260        (void *)android_media_SoundPool_pause
261    },
262    {   "resume",
263        "(I)V",
264        (void *)android_media_SoundPool_resume
265    },
266    {   "autoPause",
267        "()V",
268        (void *)android_media_SoundPool_autoPause
269    },
270    {   "autoResume",
271        "()V",
272        (void *)android_media_SoundPool_autoResume
273    },
274    {   "stop",
275        "(I)V",
276        (void *)android_media_SoundPool_stop
277    },
278    {   "_setVolume",
279        "(IFF)V",
280        (void *)android_media_SoundPool_setVolume
281    },
282    {   "_mute",
283        "(Z)V",
284        (void *)android_media_SoundPool_mute
285    },
286    {   "setPriority",
287        "(II)V",
288        (void *)android_media_SoundPool_setPriority
289    },
290    {   "setLoop",
291        "(II)V",
292        (void *)android_media_SoundPool_setLoop
293    },
294    {   "setRate",
295        "(IF)V",
296        (void *)android_media_SoundPool_setRate
297    },
298    {   "native_setup",
299        "(Ljava/lang/Object;ILjava/lang/Object;)I",
300        (void*)android_media_SoundPool_native_setup
301    },
302    {   "native_release",
303        "()V",
304        (void*)android_media_SoundPool_release
305    }
306};
307
308static const char* const kClassPathName = "android/media/SoundPool";
309
310jint JNI_OnLoad(JavaVM* vm, void* /* reserved */)
311{
312    JNIEnv* env = NULL;
313    jint result = -1;
314    jclass clazz;
315
316    if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
317        ALOGE("ERROR: GetEnv failed\n");
318        return result;
319    }
320    assert(env != NULL);
321
322    clazz = env->FindClass(kClassPathName);
323    if (clazz == NULL) {
324        ALOGE("Can't find %s", kClassPathName);
325        return result;
326    }
327
328    fields.mNativeContext = env->GetFieldID(clazz, "mNativeContext", "J");
329    if (fields.mNativeContext == NULL) {
330        ALOGE("Can't find SoundPool.mNativeContext");
331        return result;
332    }
333
334    fields.mPostEvent = env->GetStaticMethodID(clazz, "postEventFromNative",
335                                               "(Ljava/lang/Object;IIILjava/lang/Object;)V");
336    if (fields.mPostEvent == NULL) {
337        ALOGE("Can't find android/media/SoundPool.postEventFromNative");
338        return result;
339    }
340
341    // create a reference to class. Technically, we're leaking this reference
342    // since it's a static object.
343    fields.mSoundPoolClass = (jclass) env->NewGlobalRef(clazz);
344
345    if (AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods)) < 0)
346        return result;
347
348    // Get the AudioAttributes class and fields
349    jclass audioAttrClass = env->FindClass(kAudioAttributesClassPathName);
350    if (audioAttrClass == NULL) {
351        ALOGE("Can't find %s", kAudioAttributesClassPathName);
352        return result;
353    }
354    jclass audioAttributesClassRef = (jclass)env->NewGlobalRef(audioAttrClass);
355    javaAudioAttrFields.fieldUsage = env->GetFieldID(audioAttributesClassRef, "mUsage", "I");
356    javaAudioAttrFields.fieldContentType
357                                   = env->GetFieldID(audioAttributesClassRef, "mContentType", "I");
358    javaAudioAttrFields.fieldFlags = env->GetFieldID(audioAttributesClassRef, "mFlags", "I");
359    javaAudioAttrFields.fieldFormattedTags =
360            env->GetFieldID(audioAttributesClassRef, "mFormattedTags", "Ljava/lang/String;");
361    env->DeleteGlobalRef(audioAttributesClassRef);
362    if (javaAudioAttrFields.fieldUsage == NULL || javaAudioAttrFields.fieldContentType == NULL
363            || javaAudioAttrFields.fieldFlags == NULL
364            || javaAudioAttrFields.fieldFormattedTags == NULL) {
365        ALOGE("Can't initialize AudioAttributes fields");
366        return result;
367    }
368
369    /* success -- return valid version number */
370    return JNI_VERSION_1_4;
371}
372