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hackrf: signed samples, following commit fd77cfe8a6

wip-signat
Hoernchen 2014-02-20 19:04:00 +01:00 committed by Dimitri Stolnikov
parent 7a1f12cfcf
commit cc083037fe
3 changed files with 18 additions and 20 deletions
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28
lib/hackrf/hackrf_sink_c.cc
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@ -217,7 +217,7 @@ hackrf_sink_c::hackrf_sink_c (const std::string &args)
set_if_gain( 16 ); /* preset to a reasonable default (non-GRC use case) */
_buf = (unsigned char *) malloc( BUF_LEN );
_buf = (char *) malloc( BUF_LEN );
cb_init( &_cbuf, _buf_num, BUF_LEN );
@ -325,11 +325,9 @@ bool hackrf_sink_c::stop()
}
#ifdef USE_AVX
void convert_avx(const float* inbuf, unsigned char* outbuf,const unsigned int count)
void convert_avx(const float* inbuf, char* outbuf,const unsigned int count)
{
__m256 mulme = _mm256_set_ps(127.0f, 127.0f, 127.0f, 127.0f, 127.0f, 127.0f, 127.0f, 127.0f);
__m128i addme = _mm_set_epi16(127, 127, 127, 127, 127, 127, 127, 127);
for(unsigned int i=0; i<count;i++){
__m256i itmp3 = _mm256_cvtps_epi32(_mm256_mul_ps(_mm256_loadu_ps(&inbuf[i*16+0]), mulme));
@ -340,19 +338,19 @@ void convert_avx(const float* inbuf, unsigned char* outbuf,const unsigned int co
__m128i a3 = _mm256_extractf128_si256(itmp4, 1);
__m128i a2 = _mm256_castsi256_si128(itmp4);
__m128i outshorts1 = _mm_add_epi16(_mm_packs_epi32(a0, a1), addme);
__m128i outshorts2 = _mm_add_epi16(_mm_packs_epi32(a2, a3), addme);
__m128i outbytes = _mm_packus_epi16(outshorts1, outshorts2);
__m128i outshorts1 = _mm_packs_epi32(a0, a1);
__m128i outshorts2 = _mm_packs_epi32(a2, a3);
__m128i outbytes = _mm_packs_epi16(outshorts1, outshorts2);
_mm_storeu_si128 ((__m128i*)&outbuf[i*16], outbytes);
}
}
#elif USE_SSE2
void convert_sse2(const float* inbuf, unsigned char* outbuf,const unsigned int count)
void convert_sse2(const float* inbuf, char* outbuf,const unsigned int count)
{
const register __m128 mulme = _mm_set_ps( 127.0f, 127.0f, 127.0f, 127.0f );
__m128i addme = _mm_set_epi16( 127, 127, 127, 127, 127, 127, 127, 127);
__m128 itmp1,itmp2,itmp3,itmp4;
__m128i otmp1,otmp2,otmp3,otmp4;
@ -371,20 +369,20 @@ void convert_sse2(const float* inbuf, unsigned char* outbuf,const unsigned int c
otmp3 = _mm_cvtps_epi32(itmp3);
otmp4 = _mm_cvtps_epi32(itmp4);
outshorts1 = _mm_add_epi16(_mm_packs_epi32(otmp1, otmp2), addme);
outshorts2 = _mm_add_epi16(_mm_packs_epi32(otmp3, otmp4), addme);
outshorts1 = _mm_packs_epi32(otmp1, otmp2);
outshorts2 = _mm_packs_epi32(otmp3, otmp4);
outbytes = _mm_packus_epi16(outshorts1, outshorts2);
outbytes = _mm_packs_epi16(outshorts1, outshorts2);
_mm_storeu_si128 ((__m128i*)&outbuf[i*16], outbytes);
}
}
#endif
void convert_default(float* inbuf, unsigned char* outbuf,const unsigned int count)
void convert_default(float* inbuf, char* outbuf,const unsigned int count)
{
for(unsigned int i=0; i<count;i++){
outbuf[i]= inbuf[i]*127+127;
outbuf[i]= inbuf[i]*127;
}
}
@ -401,7 +399,7 @@ int hackrf_sink_c::work( int noutput_items,
_buf_cond.wait( lock );
}
unsigned char *buf = _buf + _buf_used;
char *buf = _buf + _buf_used;
unsigned int prev_buf_used = _buf_used;
unsigned int remaining = (BUF_LEN-_buf_used)/2; //complex

2
lib/hackrf/hackrf_sink_c.h
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@ -134,7 +134,7 @@ private:
// gr::thread::thread _thread;
circular_buffer_t _cbuf;
unsigned char *_buf;
char *_buf;
unsigned int _buf_num;
unsigned int _buf_used;
boost::mutex _buf_mutex;

8
lib/hackrf/hackrf_source_c.cc
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@ -120,11 +120,11 @@ hackrf_source_c::hackrf_source_c (const std::string &args)
// create a lookup table for gr_complex values
for (unsigned int i = 0; i <= 0xffff; i++) {
#ifdef BOOST_LITTLE_ENDIAN
_lut.push_back( gr_complex( (float(i & 0xff) - 127.5f) * (1.0f/128.0f),
(float(i >> 8) - 127.5f) * (1.0f/128.0f) ) );
_lut.push_back( gr_complex( (float(char(i & 0xff))) * (1.0f/128.0f),
(float(char(i >> 8))) * (1.0f/128.0f) ) );
#else // BOOST_BIG_ENDIAN
_lut.push_back( gr_complex( (float(i >> 8) - 127.5f) * (1.0f/128.0f),
(float(i & 0xff) - 127.5f) * (1.0f/128.0f) ) );
_lut.push_back( gr_complex( (float(char(i >> 8))) * (1.0f/128.0f),
(float(char(i & 0xff))) * (1.0f/128.0f) ) );
#endif
}