From: n4hy <n4hy@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 1 Oct 2008 17:18:13 +0000 (+0000)
Subject: when gr_firdes.i was last touched, my version 2 filter design programs were removed... 
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=d9b0663b0170c7f5958df900ce68f15ea2b0434f;p=debian%2Fgnuradio

when gr_firdes.i was last touched, my version 2 filter design programs were removed from the swig file.  Also added is appropriate remarks for the low_pass_2 only.  More later

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9693 221aa14e-8319-0410-a670-987f0aec2ac5
---

diff --git a/gnuradio-core/src/lib/general/gr_firdes.h b/gnuradio-core/src/lib/general/gr_firdes.h
index bb62dad8..7b30084d 100644
--- a/gnuradio-core/src/lib/general/gr_firdes.h
+++ b/gnuradio-core/src/lib/general/gr_firdes.h
@@ -68,6 +68,21 @@ class gr_firdes {
 	    win_type window = WIN_HAMMING,
 	    double beta = 6.76);		// used only with Kaiser
 
+  /*!
+   * \brief use "window method" to design a low-pass FIR filter
+   *
+   * \p gain:			overall gain of filter (typically 1.0)
+   * \p sampling_freq:		sampling freq (Hz)
+   * \p cutoff_freq:		center of transition band (Hz)
+   * \p transition_width:	width of transition band (Hz).
+   * \p attenuation_dB          required stopband attenuation
+   *				The normalized width of the transition
+   *				band is what sets the number of taps
+   *				required.  Narrow --> more taps
+   * \p window_type: 		What kind of window to use. Determines
+   *				maximum attenuation and passband ripple.
+   * \p beta:			parameter for Kaiser window
+   */
   static std::vector<float>
   low_pass_2 (double gain,
 	    double sampling_freq,
diff --git a/gnuradio-core/src/lib/general/gr_firdes.i b/gnuradio-core/src/lib/general/gr_firdes.i
index 6fbe27f6..4ac9855d 100644
--- a/gnuradio-core/src/lib/general/gr_firdes.i
+++ b/gnuradio-core/src/lib/general/gr_firdes.i
@@ -42,6 +42,31 @@ class gr_firdes {
 	    double beta = 6.76 		// used only with Kaiser
 	    ) throw(std::out_of_range);
 
+  /*!
+   * \brief use "window method" to design a low-pass FIR filter
+   *  using alternative design criteria
+   * \p gain:			overall gain of filter (typically 1.0)
+   * \p sampling_freq:		sampling freq (Hz)
+   * \p cutoff_freq:		center of transition band (Hz)
+   * \p transition_width:	width of transition band (Hz).
+   *				The normalized width of the transition
+   *				band is what sets the number of taps
+   *				required.  Narrow --> more taps
+   * \p attenuation_dB          The required stop band attenuation in dB
+   * \p window_type: 		What kind of window to use. Determines
+   *				maximum attenuation and passband ripple.
+   * \p beta:			parameter for Kaiser window
+   */
+  static std::vector<float>
+  low_pass_2 (double gain,
+	    double sampling_freq,
+	    double cutoff_freq,		// Hz center of transition band
+	    double transition_width,	// Hz width of transition band
+	    double attenuation_dB,       // out of band attenuation
+	    win_type window = WIN_HAMMING,
+	    double beta = 6.76 		// used only with Kaiser
+	    ) throw(std::out_of_range);
+
   /*!
    * \brief use "window method" to design a high-pass FIR filter
    *