bladeRF: 8bit source support

The gnuradio sink now receives 8bit samples. Meta mode is currently not working with 8bit mode.
Nuand · Feb 14, 2023 · af95b97 · af95b97
1 parent 226dac9
commit af95b97
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Showing 2 changed files with 8 additions and 3 deletions.
diff --git a/lib/bladerf/bladerf_source_c.cc b/lib/bladerf/bladerf_source_c.cc
@@ -331,9 +331,13 @@ int bladerf_source_c::work(int noutput_items,
 
   // convert from int16_t to float
   // output_items is gr_complex (2x float), so num_points is 2*noutput_items
-  volk_16i_s32f_convert_32f(reinterpret_cast<float *>(_32fcbuf), _16icbuf,
-                            SCALING_FACTOR_SC16_Q11, 2*noutput_items);
-
+  if (_format == BLADERF_FORMAT_SC8_Q7 || _format == BLADERF_FORMAT_SC8_Q7_META) {
+    volk_8i_s32f_convert_32f(reinterpret_cast<float *>(_32fcbuf), (int8_t*)_16icbuf,
+                              SCALING_FACTOR_SC8_Q7, 2*noutput_items);
+  } else {
+    volk_16i_s32f_convert_32f(reinterpret_cast<float *>(_32fcbuf), _16icbuf,
+                              SCALING_FACTOR_SC16_Q11, 2*noutput_items);
+  }
   // copy the samples into output_items
   gr_complex **out = reinterpret_cast<gr_complex **>(&output_items[0]);
 

diff --git a/lib/bladerf/bladerf_source_c.h b/lib/bladerf/bladerf_source_c.h
@@ -139,6 +139,7 @@ class bladerf_source_c :
 
   /* Scaling factor used when converting from int16_t to float */
   const float SCALING_FACTOR_SC16_Q11 = 2048.0f;
+  const float SCALING_FACTOR_SC8_Q7 = 127.0f;
 };
 
 #endif // INCLUDED_BLADERF_SOURCE_C_H