问题描述
我想用jni在c层直接调用音频设置录音，在网上找了例子边研究，边编写代码时，发现SL_IID_ANDROIDSIMPLEBUFFERQUEUE这个预定义变量只有声明，没有值，导致我编译不通过
提示 Error:(178) undefined reference to ’SL_IID_ANDROIDSIMPLEBUFFERQUEUE’
而我检查过代码了，已经include相关的头文件了
include <SLES/OpenSLES.h>include <SLES/OpenSLES_Android.h>我是c菜鸟，望大神指点迷津！代码如下
int initNativeRecorder(){ SLresult f_result; SLDataLocator_IODevice loc_dev={SL_DATALOCATOR_IODEVICE,SL_IODEVICE_AUDIOINPUT,SL_DEFAULTDEVICEID_AUDIOINPUT,NULL}; SLDataSource aud_src = {&loc_dev,NULL}; LOGE('Setup Audio Input Dev! OK！'); SLDataLocator_AndroidSimpleBufferQueue mQueue = {SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE,2}; SLDataFormat_PCM mFormat = {SL_DATAFORMAT_PCM,1,SL_SAMPLINGRATE_16,SL_PCMSAMPLEFORMAT_FIXED_16,SL_PCMSAMPLEFORMAT_FIXED_16,SL_SPEAKER_FRONT_CENTER,SL_BYTEORDER_LITTLEENDIAN}; SLDataSink mAudSink = {&mQueue,&mFormat}; LOGE('Configure Audio Recorder! OK！'); const SLInterfaceID mId[1] = {SL_IID_ANDROIDSIMPLEBUFFERQUEUE}; const SLboolean mReq[1] = {SL_BOOLEAN_TRUE}; LOGE('Open Audio Device To Recorder! OK！'); f_result = (*m_Engine)->CreateAudioRecorder(m_Engine,&m_RecordObject,&aud_src,&mAudSink,1,mId,mReq); return 0;}
问题解答
回答1：应该是linking时找不到OpenSLES库，检查你的.mk档看看
