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| author | nldudok1 | 2007-12-09 17:40:08 +0000 |
|---|---|---|
| committer | nldudok1 | 2007-12-09 17:40:08 +0000 |
| commit | 100e6105278e91ab07ae37e88e83b1ab738594c9 (patch) | |
| tree | 8425af0760ea9bc68d8bfa70de8d1eee9ab40ec1 /gnuradio-core/src/lib | |
| parent | a81fada7ab253d3b8a48eab7c301c69c038c118d (diff) | |
| download | gnuradio-100e6105278e91ab07ae37e88e83b1ab738594c9.tar.gz gnuradio-100e6105278e91ab07ae37e88e83b1ab738594c9.tar.bz2 gnuradio-100e6105278e91ab07ae37e88e83b1ab738594c9.zip | |
bugfix for indexnumbers in IIR filter
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7089 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-core/src/lib')
| -rw-r--r-- | gnuradio-core/src/lib/filter/gri_iir.h | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/gnuradio-core/src/lib/filter/gri_iir.h b/gnuradio-core/src/lib/filter/gri_iir.h index 5bc67df53..61d3be44d 100644 --- a/gnuradio-core/src/lib/filter/gri_iir.h +++ b/gnuradio-core/src/lib/filter/gri_iir.h @@ -143,12 +143,6 @@ gri_iir<i_type, o_type, tap_type>::filter (const i_type input) for (i = 1; i < m; i ++) acc += (d_fbtaps[i] * d_prev_output[latest_m + i]); - // store the values twice to avoid having to handle wrap-around in the loop - d_prev_output[latest_m] = acc; - d_prev_output[latest_m+m] = acc; - d_prev_input[latest_n] = input; - d_prev_input[latest_n+n] = input; - latest_n--; latest_m--; if (latest_n < 0) @@ -156,6 +150,13 @@ gri_iir<i_type, o_type, tap_type>::filter (const i_type input) if (latest_m < 0) latest_m += m; + // store the values twice to avoid having to handle wrap-around in the loop + d_prev_output[latest_m] = acc; + d_prev_output[latest_m+m] = acc; + d_prev_input[latest_n] = input; + d_prev_input[latest_n+n] = input; + + d_latest_m = latest_m; d_latest_n = latest_n; return (o_type) acc; |