我在android 8.1.0中遇到了opensl es崩溃。
相关代码：
TEResult SLESAudioEngine::release(TEMsg *pMsg) {
TEResult ret;
SLuint32 playState = 0;
(*bqPlayerPlay)->GetPlayState(bqPlayerPlay, &playState);
LOGE(LOG_TAG, "%s, %d, %d", __FUNCTION__, __LINE__, playState);
if (bqPlayerPlay != nullptr) {
SLresult slRet = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_STOPPED);
if (slRet != SL_RESULT_SUCCESS) {
LOGE(LOG_TAG, "%s,%d SetPlayState failed %d", __FUNCTION__, __LINE__, ret);
return slRet;
}
bqPlayerPlay = nullptr;
}
if (bqPlayerBufferQueue != nullptr) {
SLresult slRet = (*bqPlayerBufferQueue)->Clear(bqPlayerBufferQueue);
if (slRet != SL_RESULT_SUCCESS) {
LOGE(LOG_TAG, "GetInterface BufferQueueItf failed %d", ret);
return slRet;
}
bqPlayerBufferQueue = nullptr;
}
if (bqPlayerObject != nullptr) {
(*bqPlayerObject)->Destroy(bqPlayerObject);
bqPlayerObject = nullptr;
}
if (outputMixObject != NULL) {
(*outputMixObject)->Destroy(outputMixObject);
outputMixObject = NULL;
}
LOGE(LOG_TAG, "%s %d Destroy", __FUNCTION__, __LINE__);
// destroy engine object, and invalidate all associated interfaces
if (engineObject != NULL) {
(*engineObject)->Destroy(engineObject);
engineObject = NULL;
}
return ret;
}
相关日志：
11-05 15:17:58.270 F/DEBUG ( 5887): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-05 15:17:58.270 F/DEBUG ( 5887): Build fingerprint: 'vivo/PD1806/PD1806:8.1.0/OPM1.171019.019/compil08312141:user/release-keys'
11-05 15:17:58.270 F/DEBUG ( 5887): Revision: '0'
11-05 15:17:58.270 F/DEBUG ( 5887): ABI: 'arm'
11-05 15:17:58.270 F/DEBUG ( 5887): pid: 5609, tid: 5835, name: jerikc.demo.app >>> com.jerikc.demo.app <<<
11-05 15:17:58.270 F/DEBUG ( 5887): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
11-05 15:17:58.270 F/DEBUG ( 5887): Cause: null pointer dereference
11-05 15:17:58.270 F/DEBUG ( 5887): r0 fffffffe r1 00000000 r2 c164d407 r3 f18e1e30
11-05 15:17:58.270 F/DEBUG ( 5887): r4 00002282 r5 f18e1da9 r6 f3e66dfc r7 00000000
11-05 15:17:58.270 F/DEBUG ( 5887): r8 f3a66704 r9 000015e9 sl d148808d fp ced2aa80
11-05 15:17:58.270 F/DEBUG ( 5887): ip 00000001 sp c9b95550 lr f18e1e07 pc f3dd0482 cpsr 880f0030
11-05 15:17:58.310 F/DEBUG ( 5887):
11-05 15:17:58.310 F/DEBUG ( 5887): backtrace:
11-05 15:17:58.310 F/DEBUG ( 5887): #00 pc 000bc482 /system/lib/libandroid_runtime.so (android::proxy_cleanup(void const*, void*, void*)+65)
11-05 15:17:58.310 F/DEBUG ( 5887): #01 pc 00040787 /system/lib/libbinder.so (android::BpBinder::ObjectManager::kill()+30)
11-05 15:17:58.310 F/DEBUG ( 5887): #02 pc 00040745 /system/lib/libbinder.so (android::BpBinder::ObjectManager::~ObjectManager()+4)
11-05 15:17:58.310 F/DEBUG ( 5887): #03 pc 000410b9 /system/lib/libbinder.so (android::BpBinder::~BpBinder()+124)
11-05 15:17:58.310 F/DEBUG ( 5887): #04 pc 00041125 /system/lib/libbinder.so (android::BpBinder::~BpBinder()+12)
11-05 15:17:58.310 F/DEBUG ( 5887): #05 pc 00040547 /system/lib/libbinder.so (android::BpRefBase::~BpRefBase()+46)
11-05 15:17:58.310 F/DEBUG ( 5887): #06 pc 00004633 /system/lib/libaudiomanager.so (_ZTv0_n12_N7android14BpAudioManagerD0Ev+22)
11-05 15:17:58.310 F/DEBUG ( 5887): #07 pc 0000dc5f /system/lib/libwilhelm.so (android::sp<android::TrackPlayerBase>::clear()+18)
11-05 15:17:58.310 F/DEBUG ( 5887): #08 pc 00016a2f /system/lib/libwilhelm.so (CEngine_Destroy(void*)+198)
11-05 15:17:58.310 F/DEBUG ( 5887): #09 pc 0001b975 /system/lib/libwilhelm.so (IObject_Destroy(SLObjectItf_ const* const*)+204)
11-05 15:17:58.310 F/DEBUG ( 5887): #10 pc 001c197f /data/app/com.jerikc.demo.app-4ZSXR9PUHNOeJT-UudwsOQ==/lib/arm/libaudioenginedemo.so (SLESAudioEngine::release(TEMsg*)+486)
11-05 15:17:59.130 V/AudioFlinger( 1002): 5609 died, releasing its sessions
答案 0 :(得分：2)
将OpenSL代码移动到单独的线程后，同样遇到了同样的问题。幸运的是，Android OS sources给出了一个简短的答案：
import org.json4s._
import org.json4s.native.JsonMethods._
import org.json4s.native.Serialization.{ read, write }
import org.json4s.native.Serialization
abstract class Tree
case class Node(nameN: String, trees: List[Tree]) extends Tree
case class Leaf(nameL: String) extends Tree
object Tree extends App {
implicit val formats = Serialization.formats(NoTypeHints)
// object creation to test the serialization
val root =
Node(
"Grand Pavois project",
List(
Node(
"studies",
List(
Leaf("preliminary studies"),
Leaf("detailled studies")
)
),
Node(
"realization",
List(
Leaf("ground"),
Leaf("building"),
Leaf("roof")
)
),
Node(
"delivery",
List(
Leaf("quality inspection"),
Leaf("customer delivery")
)
)
)
)
val serialized = write(root) // object creation and serialization
println(s"serialized: $serialized") // print the result, this is OK
// and now what about deserialization?
// string creation for deserialization
// ( it is the same as serialized above, I do like that to trace for the demo)
val rootString = """
{
"nameN": "Grand Pavois project",
"trees": [
{
"nameN": "studies",
"trees": [
{
"nameL": "preliminary studies"
},
{
"nameL": "detailled studies"
}
]
},
{
"nameN": "realization",
"trees": [
{
"nameL": "ground"
},
{
"nameL": "building"
},
{
"nameL": "roof"
}
]
},
{
"nameN": "delivery",
"trees": [
{
"nameL": "quality inspection"
},
{
"nameL": "customer delivery"
}
]
}
]
}
"""
//standard deserialization below that produce an error :
// "Parsed JSON values do not match with class constructor"
val rootFromString = read[Tree](rootString)
}
长话短说，OpenSLES引擎现在由Java对象支持，因此它需要有效的JavaVM引用才能运行。基本上，这意味着应该从JVM附加线程创建它（不确定破坏性，但是我猜想static void proxy_cleanup(const void* id, void* obj, void* cleanupCookie)
{
android_atomic_dec(&gNumProxyRefs);
JNIEnv* env = javavm_to_jnienv((JavaVM*)cleanupCookie);
env->DeleteGlobalRef((jobject)obj);
}
被传递是有原因的。）