1 files changed, 131 insertions, 0 deletions
diff --git a/gr-usrp/src/usrp1_source_c.cc b/gr-usrp/src/usrp1_source_c.cc
new file mode 100644
index 000000000..e61437006
--- /dev/null
+++ b/gr-usrp/src/usrp1_source_c.cc
@@ -0,0 +1,131 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <usrp1_source_c.h>
+#include <gr_io_signature.h>
+#include <usrp_standard.h>
+#include <usrp_bytesex.h>
+
+static const int NBASIC_SAMPLES_PER_ITEM = 2;	// I & Q
+
+usrp1_source_c_sptr
+usrp1_make_source_c (int which_board,
+		     unsigned int decim_rate,
+		     int nchan,
+		     int mux,
+		     int mode,
+		     int fusb_block_size,
+		     int fusb_nblocks,
+		     const std::string fpga_filename,
+		     const std::string firmware_filename
+		     ) throw (std::runtime_error)
+{
+  return usrp1_source_c_sptr (new usrp1_source_c (which_board,
+						  decim_rate,
+						  nchan,
+						  mux,
+						  mode,
+						  fusb_block_size,
+						  fusb_nblocks,
+						  fpga_filename,
+						  firmware_filename
+						  ));
+}
+
+
+usrp1_source_c::usrp1_source_c (int which_board,
+				unsigned int decim_rate,
+				int nchan,
+				int mux,
+				int mode,
+				int fusb_block_size,
+				int fusb_nblocks,
+				const std::string fpga_filename,
+				const std::string firmware_filename
+				) throw (std::runtime_error)
+  : usrp1_source_base ("usrp1_source_c",
+		       gr_make_io_signature (1, 1, sizeof (gr_complex)),
+		       which_board, decim_rate, nchan, mux, mode,
+		       fusb_block_size, fusb_nblocks,
+		       fpga_filename, firmware_filename)
+{
+}
+
+usrp1_source_c::~usrp1_source_c ()
+{
+  // NOP
+}
+
+int
+usrp1_source_c::ninput_bytes_reqd_for_noutput_items (int noutput_items)
+{
+  return noutput_items * NBASIC_SAMPLES_PER_ITEM * sizeof_basic_sample();
+}
+
+/*
+ * Convert interleaved 8 or 16-bit I & Q from usrp buffer into a single
+ * complex output stream.
+ */
+void
+usrp1_source_c::copy_from_usrp_buffer (gr_vector_void_star &output_items,
+				       int output_index,
+				       int output_items_available,
+				       int &output_items_produced,
+				       const void *usrp_buffer,
+				       int usrp_buffer_length,
+				       int &bytes_read)
+{
+  gr_complex *out = &((gr_complex *) output_items[0])[output_index];
+  unsigned sbs = sizeof_basic_sample();
+  unsigned nusrp_bytes_per_item = NBASIC_SAMPLES_PER_ITEM * sbs;
+
+  int nitems = std::min (output_items_available,
+			 (int)(usrp_buffer_length / nusrp_bytes_per_item));
+
+  signed char *s8 = (signed char *) usrp_buffer;
+  short *s16 = (short *) usrp_buffer;
+
+  switch (sbs){
+  case 1:
+    for (int i = 0; i < nitems; i++){
+      out[i] = gr_complex ((float)(s8[2*i+0] << 8), (float)(s8[2*i+1] << 8));
+    }
+    break;
+
+  case 2:
+    for (int i = 0; i < nitems; i++){
+      out[i] = gr_complex ((float) usrp_to_host_short(s16[2*i+0]),
+			   (float) usrp_to_host_short(s16[2*i+1]));
+    }
+    break;
+
+  default:
+    assert(0);
+  }
+
+  output_items_produced = nitems;
+  bytes_read = nitems * nusrp_bytes_per_item;
+}