--- /dev/null
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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 3, 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., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <@NAME@.h>
+
+@NAME@::@NAME@(const std::vector<@TAP_TYPE@> &taps)
+{
+ d_buffer = NULL;
+ set_taps(taps);
+}
+
+@NAME@::~@NAME@()
+{
+ if(d_buffer != NULL)
+ free(d_buffer);
+}
+
+void
+@NAME@::set_taps (const std::vector<@TAP_TYPE@> &taps)
+{
+ d_taps = gr_reverse(taps);
+
+ if(d_buffer != NULL) {
+ free(d_buffer);
+ d_buffer = NULL;
+ }
+
+ // FIXME: memalign this to 16-byte boundaries for SIMD later
+ size_t t = sizeof(@I_TYPE@) * 2 * d_taps.size();
+ d_buffer = (@I_TYPE@*)malloc(t);
+ memset(d_buffer, 0x00, t);
+ d_idx = 0;
+}
+
+@O_TYPE@
+@NAME@::filter (@I_TYPE@ input)
+{
+ unsigned int i;
+
+ d_buffer[d_idx] = input;
+ d_buffer[d_idx+ntaps()] = input;
+
+ // using the later for the case when ntaps=0;
+ // profiling shows this doesn't make a difference
+ //d_idx = (d_idx + 1) % ntaps();
+ d_idx++;
+ if(d_idx >= ntaps())
+ d_idx = 0;
+
+ @ACC_TYPE@ out = 0;
+ for(i = 0; i < ntaps(); i++) {
+ out += @INPUT_CAST@ d_buffer[d_idx + i] * d_taps[i];
+ }
+ return (@O_TYPE@)out;
+}
+
+@O_TYPE@
+@NAME@::filter (const @I_TYPE@ input[], unsigned long dec)
+{
+ unsigned int i;
+
+ for(i = 0; i < dec; i++) {
+ d_buffer[d_idx] = input[i];
+ d_buffer[d_idx+ntaps()] = input[i];
+ d_idx++;
+ if(d_idx >= ntaps())
+ d_idx = 0;
+ }
+
+ @ACC_TYPE@ out = 0;
+ for(i = 0; i < ntaps(); i++) {
+ out += @INPUT_CAST@ d_buffer[d_idx + i] * d_taps[i];
+ }
+ return (@O_TYPE@)out;
+}
+
+void
+@NAME@::filterN (@O_TYPE@ output[],
+ const @I_TYPE@ input[],
+ unsigned long n)
+{
+ for(unsigned long i = 0; i < n; i++) {
+ output[i] = filter(input[i]);
+ }
+}
+
+void
+@NAME@::filterNdec (@O_TYPE@ output[],
+ const @I_TYPE@ input[],
+ unsigned long n,
+ unsigned long decimate)
+{
+ unsigned long j = 0;
+ for(unsigned long i = 0; i < n; i++) {
+ output[i] = filter(&input[j], decimate);
+ j += decimate;
+ }
+}