c++ - 初始化时Android OpenSL ES崩溃

所以我一直坚持将Polycode移植到Android。
我正在尝试通过OpenSL ES实现音频接口(interface)。我读了一些文章，尝试从android ndk示例中复制尽可能多的内容，依此类推，但对我没有任何作用-可靠。

我正在使用最新的Android Studio(2.1.1)，因此也使用了最新的NDK(12RC1)。对于测试，我使用的是Fairphone 2(API级别21)和仿真器(Nexus 5 API级别23)。

调用CreateAudioPlayer时有时会崩溃，有时会在实现播放器对象时有时会在SetPlayState时崩溃。但是也有可能完全初始化就可以了。这与设备无关。

在Fairphone上，我在实现播放器对象时收到以下警告:

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

我的初始化代码如下:

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，是否需要等待初始化？
目前，我正在从onCreate中启动的线程初始化OpenSL。 onCreate仍在等待完成。

还是我错过任何Android配置或使用OpenSL的许可？还是我的代码有问题？

有关完整代码，请参见: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是我用于测试的东西)

欢迎提供任何帮助甚至技巧!

最佳答案

好的，因此我尝试在创建本机窗口后初始化OpenSL-似乎可以正常工作。所以我想这一直是线程问题。

我认为不必在创建本机窗口之后，而必须在“ANativeActivity_onCreate”完成之后。