diff options
Diffstat (limited to 'gr-blocks/lib/rms_ff_impl.cc')
| -rw-r--r-- | gr-blocks/lib/rms_ff_impl.cc | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/gr-blocks/lib/rms_ff_impl.cc b/gr-blocks/lib/rms_ff_impl.cc index 2b8cdc34e7..8e004ad61e 100644 --- a/gr-blocks/lib/rms_ff_impl.cc +++ b/gr-blocks/lib/rms_ff_impl.cc @@ -41,9 +41,9 @@ namespace gr { rms_ff_impl::rms_ff_impl(double alpha) : gr_sync_block("rms_ff", gr_make_io_signature(1, 1, sizeof(float)), - gr_make_io_signature(1, 1, sizeof(float))), - d_iir(alpha) + gr_make_io_signature(1, 1, sizeof(float))) { + set_alpha(alpha); } rms_ff_impl::~rms_ff_impl() @@ -53,7 +53,9 @@ namespace gr { void rms_ff_impl::set_alpha(double alpha) { - d_iir.set_taps(alpha); + d_alpha = alpha; + d_beta = 1 - d_alpha; + d_avg = 0; } int @@ -66,8 +68,8 @@ namespace gr { for(int i = 0; i < noutput_items; i++) { double mag_sqrd = in[i]*in[i]; - double f = d_iir.filter(mag_sqrd); - out[i] = sqrt(f); + d_avg = d_beta*d_avg + d_alpha*mag_sqrd; + out[i] = sqrt(d_avg); } return noutput_items; |