Android OpenSL ES在初始化时崩溃

所以我一直在把Polycode移植到Android
我正试图通过OpenSL ES实现一个音频接口。我读了一些文章，试图从android ndk示例中复制尽可能多的内容，等等，但对我来说，没有什么工作-可靠的。

我使用的是最新的Android Studio（2.1.1），因此也使用了最新的NDK（12RC1）。对于测试，我使用我的Fairphone 2（API 21级）和Emulator（Nexus 5 API 23级）。

应用程序通常在调用CreateAudioPlayer时崩溃，有时在实现播放器对象时崩溃，有时候在SetPlayState时崩溃。但也有一种情况是，完全初始化只是起作用。这是独立于设备的。

在我的Fairphone上，当我意识到玩家对象时，我会收到这些警告：

org.polycode.templateapp D/AudioTrack: TrackOffload: AudioTrack Offload disabled by property, returning false
org.polycode.templateapp W/AudioTrack: AUDIO_OUTPUT_FLAG_FAST denied by client

我的init代码如下：

SLresult lRes;
const SLInterfaceID lEngineMixIIDs[]={SL_IID_ENGINE};
const SLboolean lEngineMixReqs[]={SL_BOOLEAN_TRUE};
const SLuint32 lOutputMixIIDCount=0;
const SLInterfaceID lOutputMixIIDs[]={};
const SLboolean lOutputMixReqs[]={};
lRes = slCreateEngine(&mEngineObj, 0, NULL, 1, lEngineMixIIDs, lEngineMixReqs);
lRes = (*mEngineObj)->Realize(mEngineObj,SL_BOOLEAN_FALSE);
lRes = (*mEngineObj)->GetInterface(mEngineObj, SL_IID_ENGINE, &mEngine);
lRes=(*mEngine)->CreateOutputMix(mEngine, &mOutputMixObj,lOutputMixIIDCount,lOutputMixIIDs, lOutputMixReqs);
lRes=(*mOutputMixObj)->Realize(mOutputMixObj, SL_BOOLEAN_FALSE);
SLDataLocator_AndroidSimpleBufferQueue lDataLocatorIn;
lDataLocatorIn.locatorType = SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE;
lDataLocatorIn.numBuffers = 1;
SLDataFormat_PCM lDataFormat;
lDataFormat.formatType = SL_DATAFORMAT_PCM;
lDataFormat.numChannels = 1; // Mono sound.
lDataFormat.samplesPerSec = SL_SAMPLINGRATE_44_1;
lDataFormat.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
lDataFormat.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
lDataFormat.channelMask = SL_SPEAKER_FRONT_CENTER;
lDataFormat.endianness = SL_BYTEORDER_LITTLEENDIAN;
SLDataSource lDataSource;
lDataSource.pLocator = &lDataLocatorIn;
lDataSource.pFormat = &lDataFormat;
SLDataLocator_OutputMix lDataLocatorOut;
lDataLocatorOut.locatorType = SL_DATALOCATOR_OUTPUTMIX;
lDataLocatorOut.outputMix = mOutputMixObj;
SLDataSink lDataSink;
lDataSink.pLocator = &lDataLocatorOut;
lDataSink.pFormat = NULL;
const SLuint32 lSoundPlayerIIDCount = 2;
const SLInterfaceID lSoundPlayerIIDs[3] = { SL_IID_PLAY, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, SL_IID_VOLUME };
const SLboolean lSoundPlayerReqs[3] = { SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE };
lRes = (*mEngine)->CreateAudioPlayer(mEngine, &mPlayerObj, &lDataSource, &lDataSink, lSoundPlayerIIDCount, lSoundPlayerIIDs, lSoundPlayerReqs);
lRes = (*mPlayerObj)->Realize(mPlayerObj, SL_BOOLEAN_FALSE);
lRes = (*mPlayerObj)->GetInterface(mPlayerObj, SL_IID_PLAY, &mPlayer);
lRes = (*mPlayerObj)->GetInterface(mPlayerObj, SL_IID_ANDROIDSIMPLEBUFFERQUEUE, &mPlayerQueue);
lRes = (*mPlayerQueue)->RegisterCallback(mPlayerQueue, OpenSLAudioInterface::queueCallback, this);
lRes = (*mPlayer)->SetPlayState(mPlayer, SL_PLAYSTATE_PLAYING);

我想知道的是：在开始初始化OpenSL之前，有什么需要等待初始化的吗
目前，我正在从onCreate中启动的线程初始化OpenSL。onCreate仍在等待完成。

或者我错过了任何Android配置或使用OpenSL的权限？还是我的代码出了问题？

有关完整代码，请参阅：https://github.com/fodinabor/Polycode/tree/OpenSL/src/core/PolyOpenSLAudioInterface.cpp
和https://github.com/fodinabor/Polycode/tree/OpenSL/include/polycode/core/PolyOpenSLAudioInterface.h

Android Studio项目位于：https://github.com/fodinabor/Polycode/tree/OpenSL/build/android（TemplateApp是我用来测试的）

欢迎任何帮助甚至提示！