在项目中需要应用到faac 压缩音频传输，有网友提供了移植方法和库.so 测试了声音不对，所以参考了他的移植方法 封装的接口。

可以在资源下载自己修改http://download.csdn.net/detail/undiif123/5494433

jint

Java_com_sinaapp_bashell_AacEncoder_AACEncoderOpen(JNIEnv* env,

jobject this,jint sampleRate,jint channels)

{

faacEncConfigurationPtr myFormat;

unsigned int mpegVersion = MPEG4;

unsigned int objectType = LOW;

unsigned int useMidSide = 1;

unsigned long quantqual = 100;

static unsigned int useTns = 1;

int rawBits = 16;

int rawRate =sampleRate;

int rawEndian = 1;

int shortctl = SHORTCTL_NORMAL;

g_hEncoder = faacEncOpen(sampleRate, channels,

&samplesInput, &maxOutputBytes);

myFormat = faacEncGetCurrentConfiguration(g_hEncoder);

myFormat->allowMidside = useMidSide;

myFormat->aacObjectType = objectType;

myFormat->mpegVersion = mpegVersion;

myFormat->outputFormat =1;

myFormat->useTns = useTns;

myFormat->useLfe = 0;

myFormat->quantqual =quantqual;

myFormat->bandWidth = 0;

myFormat->shortctl = shortctl;

faacEncSetConfiguration(g_hEncoder, myFormat);

sprintf(g_szFileName,"/storage/sdcard0/new_test1.aac");//"/mnt/sdcard/new.aac");///data/IPVOD/

// sprintf(g_szFileName,"/storage/sdcard0/new_test1.pcm");//"/mnt/sdcard/new.aac");///data/IPVOD/

LOGI("samplesInput:%d,maxOutputBytes:%d",samplesInput,maxOutputBytes);

g_OutFile = fopen(g_szFileName, "wb");

if(g_OutFile == NULL) {LOGI("open aacfile failed!"); return 1;};

sprintf(g_szFileName,"/storage/sdcard0/new_test0.pcm");//"/mnt/sdcard/new.aac");///data/IPVOD/

g_OutFile0 = fopen(g_szFileName, "wb");

if(g_OutFile0 == NULL) {LOGI("open aacfile failed!"); return 1;};

return 1;

}

jint

Java_com_sinaapp_bashell_AacEncoder_AacWrite(JNIEnv* env,jobject this,jbyteArray jBuffer, jint jBufferSize) {

int *pcmbuf;

unsigned char *bitbuf;

jbyte* bBuffer = (*env)->GetByteArrayElements(env,jBuffer,0);

pcmbuf = (short*)malloc(samplesInput*sizeof(int));

bitbuf = (unsigned char*)malloc(maxOutputBytes*sizeof(unsigned char));

unsigned int bytesWritten;

if(g_hEncoder != NULL) {

unsigned int nBufferSize = (unsigned int)jBufferSize/2;

int nByteCount=0;

unsigned short* buf=(unsigned short*)bBuffer;

fwrite(jBuffer, 1, jBufferSize, g_OutFile0);

while(nByteCount < nBufferSize)

{

int audioLength=samplesInput;

if((nByteCount+samplesInput) >= nBufferSize) {

audioLength=nBufferSize-nByteCount;

}

int i;

for (i = 0; i < audioLength; i++)

{

int s = ((int16_t *)buf+nByteCount)[i];

pcmbuf[i] = s << 8;

}

nByteCount+=samplesInput;

bytesWritten = faacEncEncode(g_hEncoder,

pcmbuf,

audioLength,

bitbuf,

maxOutputBytes);

if (bytesWritten < 0)continue;

fwrite(bitbuf, 1, bytesWritten, g_OutFile);

}

}

if(bitbuf) free(bitbuf);

if(pcmbuf) free(pcmbuf);

return 1;

}

/*

jint

Java_com_sinaapp_bashell_AacEncoder_AACEncoderEncode(JNIEnv* env,

jobject this,jint hEncoder, jbyteArray inputBuffer, jint inputBufferSize)

{

int *pcmbuf;

unsigned char *bitbuf;

jbyte* bBuffer = (*env)->GetByteArrayElements(env,inputBuffer,0);

jsize jLen = (*env)->GetArrayLength(env,inputBuffer);

int bytesInput = (int)jLen;

pcmbuf = (short*)malloc(samplesInput*sizeof(int));

bitbuf = (unsigned char*)malloc(maxOutputBytes*sizeof(unsigned char));

unsigned int bytesWritten;

if(g_hEncoder != NULL) {

unsigned int nBufferSize = (unsigned int)inputBufferSize/2;

int nByteCount=0;

unsigned short* buf=(unsigned short*)bBuffer;

fwrite(bBuffer, 1, inputBufferSize, g_OutFile0);

while(nByteCount < nBufferSize)

{

int audioLength

jint

Java_com_sinaapp_bashell_AacEncoder_AACEncoderClose(JNIEnv* env,jobject this)

{

if(g_hEncoder != NULL) {

faacEncClose(g_hEncoder);

}

if(g_OutFile)fclose(g_OutFile);

return 1;

}