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improve performance in type conversion #43

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improve performance in type conversion #43

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49 changes: 18 additions & 31 deletions HackRF_Streaming.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -516,66 +516,53 @@ void readbuf(int8_t * src, void * dst, uint32_t len,uint32_t format,size_t offse

if(format==HACKRF_FORMAT_INT8){
int8_t *samples_cs8=(int8_t *) dst+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
samples_cs8[i*BYTES_PER_SAMPLE] = src[i*BYTES_PER_SAMPLE];
samples_cs8[i*BYTES_PER_SAMPLE+1] = src[i*BYTES_PER_SAMPLE+1];
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
samples_cs8[i] = src[i];
}

}else if(format==HACKRF_FORMAT_INT16){

int16_t *samples_cs16=(int16_t *) dst+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
samples_cs16[i*BYTES_PER_SAMPLE] = (int16_t)(src[i*BYTES_PER_SAMPLE]<<8);
samples_cs16[i*BYTES_PER_SAMPLE+1] = (int16_t)(src[i*BYTES_PER_SAMPLE+1]<<8);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
samples_cs16[i] = (int16_t)(src[i])<<8;
}
}else if(format==HACKRF_FORMAT_FLOAT32){
float *samples_cf32=(float *) dst+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
samples_cf32[i*BYTES_PER_SAMPLE] = (float)(src[i*BYTES_PER_SAMPLE]/127.0);
samples_cf32[i*BYTES_PER_SAMPLE+1] = (float)(src[i*BYTES_PER_SAMPLE+1]/127.0);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
samples_cf32[i] = (float)(src[i])/127.0;
}
}else if(format==HACKRF_FORMAT_FLOAT64){
double *samples_cf64=(double *) dst+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
samples_cf64[i*BYTES_PER_SAMPLE] = (double)(src[i*BYTES_PER_SAMPLE]/127.0);
samples_cf64[i*BYTES_PER_SAMPLE+1] = (double)(src[i*BYTES_PER_SAMPLE+1]/127.0);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
samples_cf64[i] = (double)(src[i])/127.0;
}
} else {
SoapySDR_log( SOAPY_SDR_ERROR, "read format not support" );
SoapySDR_log( SOAPY_SDR_ERROR, "read format not supported" );
}
}


void writebuf(const void * src, int8_t* dst, uint32_t len,uint32_t format,size_t offset) {
if(format==HACKRF_FORMAT_INT8){
int8_t *samples_cs8=(int8_t *) src+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
dst[i*BYTES_PER_SAMPLE] = samples_cs8[i*BYTES_PER_SAMPLE];
dst[i*BYTES_PER_SAMPLE+1] = samples_cs8[i*BYTES_PER_SAMPLE+1];
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
dst[i] = samples_cs8[i];
}

}else if(format==HACKRF_FORMAT_INT16){
int16_t *samples_cs16=(int16_t *) src+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
dst[i*BYTES_PER_SAMPLE] = (int8_t) (samples_cs16[i*BYTES_PER_SAMPLE] >> 8);
dst[i*BYTES_PER_SAMPLE+1] = (int8_t) (samples_cs16[i*BYTES_PER_SAMPLE+1] >> 8);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
dst[i] = (int8_t) (samples_cs16[i] >> 8);
}
}else if(format==HACKRF_FORMAT_FLOAT32){
float *samples_cf32=(float *) src+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
dst[i*BYTES_PER_SAMPLE] = (int8_t) (samples_cf32[i*BYTES_PER_SAMPLE] * 127.0);
dst[i*BYTES_PER_SAMPLE+1] = (int8_t) (samples_cf32[i*BYTES_PER_SAMPLE+1] * 127.0);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
dst[i] = (int8_t) (samples_cf32[i] * 127.0);
}
}else if(format==HACKRF_FORMAT_FLOAT64){
double *samples_cf64=(double *) src+offset*BYTES_PER_SAMPLE;
for (uint32_t i=0;i<len;++i){
dst[i*BYTES_PER_SAMPLE] = (int8_t) (samples_cf64[i*BYTES_PER_SAMPLE] * 127.0);
dst[i*BYTES_PER_SAMPLE+1] = (int8_t) (samples_cf64[i*BYTES_PER_SAMPLE+1] * 127.0);
for (uint32_t i=0;i<len*BYTES_PER_SAMPLE;++i){
dst[i] = (int8_t) (samples_cf64[i] * 127.0);
}

}else {
SoapySDR_log( SOAPY_SDR_ERROR, "write format not support" );

SoapySDR_log( SOAPY_SDR_ERROR, "write format not supported" );
}
}

Expand Down