Android Audio代码分析22 - AudioEffect::getEnabled函数
今天来看看AudioEffect中enable相关的接口。
*****************************************源码*************************************************
//Test case 1.3: test getEnabled() failure when called on released effect
@LargeTest
public void test1_3GetEnabledAfterRelease() throws Exception {
boolean result = false;
String msg = "test1_3GetEnabledAfterRelease()";
try {
AudioEffect effect = new AudioEffect(AudioEffect.EFFECT_TYPE_EQUALIZER,
AudioEffect.EFFECT_TYPE_NULL,
0,
0);
assertNotNull(msg + ": could not create AudioEffect", effect);
effect.release();
try {
effect.getEnabled();
} catch (IllegalStateException e) {
result = true;
}
} catch (IllegalArgumentException e) {
msg = msg.concat(": Equalizer not found");
} catch (UnsupportedOperationException e) {
msg = msg.concat(": Effect library not loaded");
}
assertTrue(msg, result);
}
**********************************************************************************************
源码路径：
frameworks\base\media\tests\mediaframeworktest\src\com\android\mediaframeworktest\functional\MediaAudioEffectTest.java
#######################说明################################
//Test case 1.3: test getEnabled() failure when called on released effect
@LargeTest
public void test1_3GetEnabledAfterRelease() throws Exception {
boolean result = false;
String msg = "test1_3GetEnabledAfterRelease()";
try {
AudioEffect effect = new AudioEffect(AudioEffect.EFFECT_TYPE_EQUALIZER,
AudioEffect.EFFECT_TYPE_NULL,
0,
0);
assertNotNull(msg + ": could not create AudioEffect", effect);
effect.release();
++++++++++++++++++++++++++++++release++++++++++++++++++++++++++++++++++
/**
* Releases the native AudioEffect resources. It is a good practice to
* release the effect engine when not in use as control can be returned to
* other applications or the native resources released.
*/
public void release() {
synchronized (mStateLock) {
native_release();
++++++++++++++++++++++++++++++android_media_AudioEffect_native_release++++++++++++++++++++++++++++++++++
static void android_media_AudioEffect_native_release(JNIEnv *env, jobject thiz) {
// do everything a call to finalize would
// 删除创建AudioEffect时，创建的对象
android_media_AudioEffect_native_finalize(env, thiz);
++++++++++++++++++++++++++++++android_media_AudioEffect_native_finalize++++++++++++++++++++++++++++++++++
static void android_media_AudioEffect_native_finalize(JNIEnv *env, jobject thiz) {
LOGV("android_media_AudioEffect_native_finalize jobject: %x\n", (int)thiz);
// delete the AudioEffect object
AudioEffect* lpAudioEffect = (AudioEffect *)env->GetIntField(
thiz, fields.fidNativeAudioEffect);
// 此处删除了lpAudioEffect
// getEnabled的时候会调用lpAudioEffect的接口，所以release后再getEnabled会产生异常
if (lpAudioEffect) {
LOGV("deleting AudioEffect: %x\n", (int)lpAudioEffect);
delete lpAudioEffect;
}
// delete the JNI data
AudioEffectJniStorage* lpJniStorage = (AudioEffectJniStorage *)env->GetIntField(
thiz, fields.fidJniData);
if (lpJniStorage) {
LOGV("deleting pJniStorage: %x\n", (int)lpJniStorage);
delete lpJniStorage;
}
}
------------------------------android_media_AudioEffect_native_finalize----------------------------------
// + reset the native resources in the Java object so any attempt to access
// them after a call to release fails.
env->SetIntField(thiz, fields.fidNativeAudioEffect, 0);
env->SetIntField(thiz, fields.fidJniData, 0);
}
------------------------------android_media_AudioEffect_native_release----------------------------------
mState = STATE_UNINITIALIZED;
}
}
------------------------------release----------------------------------
try {
effect.getEn
补充：移动开发 , Android ,
