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   1 /* -*- c++ -*- */
   2 /*
   3  * Copyright 2008 Free Software Foundation, Inc.
   4  *
   5  * This file is part of GNU Radio
   6  *
   7  * GNU Radio is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3, or (at your option)
  10  * any later version.
  11  *
  12  * GNU Radio is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with GNU Radio; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street,
  20  * Boston, MA 02110-1301, USA.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 //#define MSDD_DEBUG2_TRUE
  28
  29 #ifdef MSDD_DEBUG2_TRUE
  30 #include <iostream>
  31 #define MSDD_DEBUG2(x) std::cout << x << std::endl;
  32 #else
  33 #define MSDD_DEBUG2(x)
  34 #endif
  35
  36 #include <msdd_source_c.h>
  37 #include <gr_io_signature.h>
  38
  39 namespace {
  40   static const int NBASIC_SAMPLES_PER_ITEM = 2; // I & Q
  41 };
  42
  43 msdd_source_c_sptr
  44 msdd_make_source_c (int which_board,
  45                     int opp_mode,
  46                     const char *src,
  47                     unsigned short port_src
  48                     ) throw (std::runtime_error)
  49 {
  50   return msdd_source_c_sptr (new msdd_source_c (
  51                                                 which_board,
  52                                                 opp_mode,
  53                                                 src,
  54                                                 port_src
  55                                                 ));
  56 }
  57
  58 msdd_source_c::msdd_source_c (int which_board,
  59                               int opp_mode,
  60                               const char *src,
  61                               unsigned short port_src
  62                               ) throw (std::runtime_error)
  63   : msdd_source_base ("msdd_source_c",
  64                       gr_make_io_signature (1, 1, 2 * sizeof (int)),
  65                       which_board, opp_mode, src, port_src
  66                       )
  67 {
  68
  69   switch (sizeof_basic_sample()) {
  70   case 4:
  71           d_buffer_copy_behavior.reset(
  72            new msdd::BufferCopyBehaviorComplex <short> ());
  73     break;
  74   default:
  75     assert(false);
  76   }
  77
  78 }
  79
  80 msdd_source_c::~msdd_source_c ()
  81 {
  82 }
  83
  84 int
  85 msdd_source_c::ninput_bytes_reqd_for_noutput_items (int noutput_items)
  86 {
  87   return noutput_items * NBASIC_SAMPLES_PER_ITEM * sizeof_basic_sample();
  88 }
  89
  90 /*
  91  * Copy 8 bit fft from mdss buffer into output buffer
  92  */
  93 void
  94 msdd_source_c::copy_from_msdd_buffer (gr_vector_void_star &output_items,
  95                                       int output_index,
  96                                       int output_items_available,
  97                                       int &output_items_produced,
  98                                       const void *msdd_buffer,
  99                                       int buffer_length,
 100                                       int &bytes_read)
 101 {
 102   unsigned nmsdd_bytes_per_item = NBASIC_SAMPLES_PER_ITEM * sizeof_basic_sample();
 103
 104   unsigned int nitems = std::min (output_items_available,
 105                                   (int)(buffer_length / nmsdd_bytes_per_item));
 106
 107   (*d_buffer_copy_behavior.get())(output_items, msdd_buffer, output_index, nitems);
 108
 109   output_items_produced = nitems;
 110   bytes_read = nitems * nmsdd_bytes_per_item;
 111 }