CVS Root: /cvs/gstreamer Module: gst-plugins-good Changes by: slomo Date: Thu Aug 16 2007 17:02:21 UTC Log message: reviewed by: Stefan Kost <en...@us...> * gst/audiofx/Makefile.am: * gst/audiofx/audiochebyshevfreqband.c: (gst_audio_chebyshev_freq_band_mode_get_type), (gst_audio_chebyshev_freq_band_base_init), (gst_audio_chebyshev_freq_band_dispose), (gst_audio_chebyshev_freq_band_class_init), (gst_audio_chebyshev_freq_band_init), (generate_biquad_coefficients), (calculate_gain), (generate_coefficients), (gst_audio_chebyshev_freq_band_set_property), (gst_audio_chebyshev_freq_band_get_property), (gst_audio_chebyshev_freq_band_setup), (process), (process_64), (process_32), (gst_audio_chebyshev_freq_band_transform_ip), (gst_audio_chebyshev_freq_band_start): * gst/audiofx/audiochebyshevfreqband.h: * gst/audiofx/audiochebyshevfreqlimit.c: (gst_audio_chebyshev_freq_limit_mode_get_type), (gst_audio_chebyshev_freq_limit_base_init), (gst_audio_chebyshev_freq_limit_dispose), (gst_audio_chebyshev_freq_limit_class_init), (gst_audio_chebyshev_freq_limit_init), (generate_biquad_coefficients), (calculate_gain), (generate_coefficients), (gst_audio_chebyshev_freq_limit_set_property), (gst_audio_chebyshev_freq_limit_get_property), (gst_audio_chebyshev_freq_limit_setup), (process), (process_64), (process_32), (gst_audio_chebyshev_freq_limit_transform_ip), (gst_audio_chebyshev_freq_limit_start): * gst/audiofx/audiochebyshevfreqlimit.h: * gst/audiofx/audiofx.c: (plugin_init): Add Chebyshev lowpass/highpass and bandpass/bandreject elements. Fixes #464800. * tests/check/Makefile.am: * tests/check/elements/.cvsignore: * tests/check/elements/audiochebyshevfreqband.c: (setup_audiochebyshevfreqband), (cleanup_audiochebyshevfreqband), (GST_START_TEST), (audiochebyshevfreqband_suite), (main): * tests/check/elements/audiochebyshevfreqlimit.c: (setup_audiochebyshevfreqlimit), (cleanup_audiochebyshevfreqlimit), (GST_START_TEST), (audiochebyshevfreqlimit_suite), (main): Add unit tests for the chebyshev filters. * docs/plugins/Makefile.am: * docs/plugins/gst-plugins-good-plugins-docs.sgml: * docs/plugins/gst-plugins-good-plugins-sections.txt: * docs/plugins/gst-plugins-good-plugins.args: * docs/plugins/inspect/plugin-1394.xml: * docs/plugins/inspect/plugin-audiofx.xml: * docs/plugins/inspect/plugin-dv.xml: * docs/plugins/inspect/plugin-flac.xml: * docs/plugins/inspect/plugin-jpeg.xml: * docs/plugins/inspect/plugin-png.xml: * docs/plugins/inspect/plugin-rtp.xml: * docs/plugins/inspect/plugin-shout2send.xml: * docs/plugins/inspect/plugin-wavpack.xml: And add docs for the chebyshev filters. While doing that also run make update in docs/plugins. Modified files: . : ChangeLog docs/plugins : Makefile.am gst-plugins-good-plugins-docs.sgml gst-plugins-good-plugins-sections.txt gst-plugins-good-plugins.args docs/plugins/inspect: plugin-1394.xml plugin-audiofx.xml plugin-dv.xml plugin-flac.xml plugin-jpeg.xml plugin-png.xml plugin-rtp.xml plugin-shout2send.xml plugin-wavpack.xml gst/audiofx : Makefile.am audiofx.c tests/check : Makefile.am tests/check/elements: .cvsignore Added files: gst/audiofx : audiochebyshevfreqband.c audiochebyshevfreqband.h audiochebyshevfreqlimit.c audiochebyshevfreqlimit.h tests/check/elements: audiochebyshevfreqband.c audiochebyshevfreqlimit.c Links: http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/ChangeLog.diff?r1=1.3052&r2=1.3053 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/Makefile.am.diff?r1=1.44&r2=1.45 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins-docs.sgml.diff?r1=1.48&r2=1.49 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins-sections.txt.diff?r1=1.44&r2=1.45 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins.args.diff?r1=1.25&r2=1.26 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-1394.xml.diff?r1=1.21&r2=1.22 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-audiofx.xml.diff?r1=1.8&r2=1.9 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-dv.xml.diff?r1=1.21&r2=1.22 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-flac.xml.diff?r1=1.22&r2=1.23 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-jpeg.xml.diff?r1=1.23&r2=1.24 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-png.xml.diff?r1=1.23&r2=1.24 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-rtp.xml.diff?r1=1.27&r2=1.28 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-shout2send.xml.diff?r1=1.21&r2=1.22 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-wavpack.xml.diff?r1=1.2&r2=1.3 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/Makefile.am.diff?r1=1.6&r2=1.7 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/audiochebyshevfreqband.c?rev=1.1&content-type=text/vnd.viewcvs-markup http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/audiochebyshevfreqband.h?rev=1.1&content-type=text/vnd.viewcvs-markup http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/audiochebyshevfreqlimit.c?rev=1.1&content-type=text/vnd.viewcvs-markup http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/audiochebyshevfreqlimit.h?rev=1.1&content-type=text/vnd.viewcvs-markup http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/gst/audiofx/audiofx.c.diff?r1=1.5&r2=1.6 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/tests/check/Makefile.am.diff?r1=1.38&r2=1.39 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/tests/check/elements/.cvsignore.diff?r1=1.16&r2=1.17 http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/tests/check/elements/audiochebyshevfreqband.c?rev=1.1&content-type=text/vnd.viewcvs-markup http://freedesktop.org/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins-good/tests/check/elements/audiochebyshevfreqlimit.c?rev=1.1&content-type=text/vnd.viewcvs-markup ====Begin Diffs==== Index: ChangeLog =================================================================== RCS file: /cvs/gstreamer/gst-plugins-good/ChangeLog,v retrieving revision 1.3052 retrieving revision 1.3053 diff -u -d -r1.3052 -r1.3053 --- ChangeLog 16 Aug 2007 12:15:06 -0000 1.3052 +++ ChangeLog 16 Aug 2007 17:02:06 -0000 1.3053 @@ -1,3 +1,66 @@ +2007-08-16 Sebastian Dröge <sl...@ci...> + + reviewed by: Stefan Kost <en...@us...> + * gst/audiofx/Makefile.am: + * gst/audiofx/audiochebyshevfreqband.c: + (gst_audio_chebyshev_freq_band_mode_get_type), + (gst_audio_chebyshev_freq_band_base_init), + (gst_audio_chebyshev_freq_band_dispose), + (gst_audio_chebyshev_freq_band_class_init), + (gst_audio_chebyshev_freq_band_init), + (generate_biquad_coefficients), (calculate_gain), + (generate_coefficients), + (gst_audio_chebyshev_freq_band_set_property), + (gst_audio_chebyshev_freq_band_get_property), + (gst_audio_chebyshev_freq_band_setup), (process), (process_64), + (process_32), (gst_audio_chebyshev_freq_band_transform_ip), + (gst_audio_chebyshev_freq_band_start): + * gst/audiofx/audiochebyshevfreqband.h: + * gst/audiofx/audiochebyshevfreqlimit.c: + (gst_audio_chebyshev_freq_limit_mode_get_type), + (gst_audio_chebyshev_freq_limit_base_init), + (gst_audio_chebyshev_freq_limit_dispose), + (gst_audio_chebyshev_freq_limit_class_init), + (gst_audio_chebyshev_freq_limit_init), + (gst_audio_chebyshev_freq_limit_set_property), + (gst_audio_chebyshev_freq_limit_get_property), + (gst_audio_chebyshev_freq_limit_setup), (process), (process_64), + (process_32), (gst_audio_chebyshev_freq_limit_transform_ip), + (gst_audio_chebyshev_freq_limit_start): + * gst/audiofx/audiochebyshevfreqlimit.h: + * gst/audiofx/audiofx.c: (plugin_init): + Add Chebyshev lowpass/highpass and bandpass/bandreject elements. + Fixes #464800. + * tests/check/Makefile.am: + * tests/check/elements/.cvsignore: + * tests/check/elements/audiochebyshevfreqband.c: + (setup_audiochebyshevfreqband), (cleanup_audiochebyshevfreqband), + (GST_START_TEST), (audiochebyshevfreqband_suite), (main): + * tests/check/elements/audiochebyshevfreqlimit.c: + (setup_audiochebyshevfreqlimit), (cleanup_audiochebyshevfreqlimit), + (GST_START_TEST), (audiochebyshevfreqlimit_suite), (main): + Add unit tests for the chebyshev filters. + * docs/plugins/Makefile.am: + * docs/plugins/gst-plugins-good-plugins-docs.sgml: + * docs/plugins/gst-plugins-good-plugins-sections.txt: + * docs/plugins/gst-plugins-good-plugins.args: + * docs/plugins/inspect/plugin-1394.xml: + * docs/plugins/inspect/plugin-audiofx.xml: + * docs/plugins/inspect/plugin-dv.xml: + * docs/plugins/inspect/plugin-flac.xml: + * docs/plugins/inspect/plugin-jpeg.xml: + * docs/plugins/inspect/plugin-png.xml: + * docs/plugins/inspect/plugin-rtp.xml: + * docs/plugins/inspect/plugin-shout2send.xml: + * docs/plugins/inspect/plugin-wavpack.xml: + And add docs for the chebyshev filters. While doing + that also run make update in docs/plugins. 2007-08-16 Stefan Kost <en...@us...> * ext/annodex/gstcmmltag.c: Index: Makefile.am RCS file: /cvs/gstreamer/gst-plugins-good/gst/audiofx/Makefile.am,v retrieving revision 1.6 retrieving revision 1.7 diff -u -d -r1.6 -r1.7 --- Makefile.am 8 Mar 2007 10:02:12 -0000 1.6 +++ Makefile.am 16 Aug 2007 17:02:06 -0000 1.7 @@ -7,7 +7,9 @@ audiopanorama.c \ audioinvert.c \ audioamplify.c \ - audiodynamic.c + audiodynamic.c \ + audiochebyshevfreqlimit.c \ + audiochebyshevfreqband.c # flags used to compile this plugin libgstaudiofx_la_CFLAGS = $(GST_CFLAGS) \ @@ -18,12 +20,15 @@ $(GST_BASE_LIBS) \ $(GST_CONTROLLER_LIBS) \ $(GST_PLUGINS_BASE_LIBS) \ - -lgstaudio-$(GST_MAJORMINOR) + -lgstaudio-$(GST_MAJORMINOR) \ + $(LIBM) libgstaudiofx_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) # headers we need but don't want installed noinst_HEADERS = audiopanorama.h \ audioinvert.h \ audioamplify.h \ - audiodynamic.h + audiodynamic.h \ + audiochebyshevfreqlimit.h \ --- NEW FILE: audiochebyshevfreqband.c --- /* * GStreamer * Copyright (C) 2007 Sebastian Dröge <sl...@ci...> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * This library 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 * Library General Public License for more details. * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ * Chebyshev type 1 filter design based on * "The Scientist and Engineer's Guide to DSP", Chapter 20. * http://www.dspguide.com/ * For type 2 and Chebyshev filters in general read * http://en.wikipedia.org/wiki/Chebyshev_filter * Transformation from lowpass to bandpass/bandreject: * http://docs.dewresearch.com/DspHelp/html/IDH_LinearSystems_LowpassToBandPassZ.htm * http://docs.dewresearch.com/DspHelp/html/IDH_LinearSystems_LowpassToBandStopZ.htm * /** * SECTION:element-audiochebyshevfreqband * @short_description: Chebyshev band pass and band reject filter * <refsect2> * <para> * Attenuates all frequencies outside (bandpass) or inside (bandreject) of a frequency * band. The number of poles and the ripple parameter control the rolloff. * </para> * For type 1 the ripple parameter specifies how much ripple in dB is allowed in the passband, i.e. * some frequencies in the passband will be amplified by that value. A higher ripple value will allow * a faster rolloff. * For type 2 the ripple parameter specifies the stopband attenuation. In the stopband the gain will * be at most this value. A lower ripple value will allow a faster rolloff. * As a special case, a Chebyshev type 1 filter with no ripple is a Butterworth filter. * <title>Example launch line</title> * <programlisting> * gst-launch audiotestsrc freq=1500 ! audioconvert ! audiochebyshevfreqband mode=band-pass lower-frequency=1000 upper-frequenc=6000 poles=4 ! audioconvert ! alsasink * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiochebyshevfreqband mode=band-reject lower-frequency=1000 upper-frequency=4000 ripple=0.2 ! audioconvert ! alsasink * gst-launch audiotestsrc wave=white-noise ! audioconvert ! audiochebyshevfreqband mode=band-pass lower-frequency=1000 upper-frequency=4000 type=2 ! audioconvert ! alsasink * </programlisting> * </refsect2> #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <gst/gst.h> #include <gst/base/gstbasetransform.h> #include <gst/audio/audio.h> #include <gst/audio/gstaudiofilter.h> #include <gst/controller/gstcontroller.h> #include <math.h> #include "audiochebyshevfreqband.h" #define GST_CAT_DEFAULT gst_audio_chebyshev_freq_band_debug GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); static const GstElementDetails element_details = GST_ELEMENT_DETAILS ("AudioChebyshevFreqBand", "Filter/Effect/Audio", "Chebyshev band pass and band reject filter", "Sebastian Dröge <sl...@ci...>"); /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; PROP_0, PROP_MODE, PROP_TYPE, PROP_LOWER_FREQUENCY, PROP_UPPER_FREQUENCY, PROP_RIPPLE, PROP_POLES #define ALLOWED_CAPS \ "audio/x-raw-float," \ " width = (int) { 32, 64 }, " \ " endianness = (int) BYTE_ORDER," \ " rate = (int) [ 1, MAX ]," \ " channels = (int) [ 1, MAX ]" #define DEBUG_INIT(bla) \ GST_DEBUG_CATEGORY_INIT (gst_audio_chebyshev_freq_band_debug, "audiochebyshevfreqband", 0, "audiochebyshevfreqband element"); GST_BOILERPLATE_FULL (GstAudioChebyshevFreqBand, gst_audio_chebyshev_freq_band, GstAudioFilter, GST_TYPE_AUDIO_FILTER, DEBUG_INIT); static void gst_audio_chebyshev_freq_band_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_audio_chebyshev_freq_band_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_audio_chebyshev_freq_band_setup (GstAudioFilter * filter, GstRingBufferSpec * format); static GstFlowReturn gst_audio_chebyshev_freq_band_transform_ip (GstBaseTransform * base, GstBuffer * buf); static gboolean gst_audio_chebyshev_freq_band_start (GstBaseTransform * base); static void process_64 (GstAudioChebyshevFreqBand * filter, gdouble * data, guint num_samples); static void process_32 (GstAudioChebyshevFreqBand * filter, gfloat * data, guint num_samples); MODE_BAND_PASS = 0, MODE_BAND_REJECT #define GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND_MODE (gst_audio_chebyshev_freq_band_mode_get_type ()) static GType gst_audio_chebyshev_freq_band_mode_get_type (void) static GType gtype = 0; if (gtype == 0) { static const GEnumValue values[] = { {MODE_BAND_PASS, "Band pass (default)", "band-pass"}, {MODE_BAND_REJECT, "Band reject", "band-reject"}, {0, NULL, NULL} }; gtype = g_enum_register_static ("GstAudioChebyshevFreqBandMode", values); } return gtype; } /* GObject vmethod implementations */ static void gst_audio_chebyshev_freq_band_base_init (gpointer klass) GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstCaps *caps; gst_element_class_set_details (element_class, &element_details); caps = gst_caps_from_string (ALLOWED_CAPS); gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass), caps); gst_caps_unref (caps); gst_audio_chebyshev_freq_band_dispose (GObject * object) GstAudioChebyshevFreqBand *filter = GST_AUDIO_CHEBYSHEV_FREQ_BAND (object); if (filter->a) { g_free (filter->a); filter->a = NULL; if (filter->b) { g_free (filter->b); filter->b = NULL; if (filter->channels) { GstAudioChebyshevFreqBandChannelCtx *ctx; gint i, channels = GST_AUDIO_FILTER (filter)->format.channels; for (i = 0; i < channels; i++) { ctx = &filter->channels[i]; g_free (ctx->x); g_free (ctx->y); } g_free (filter->channels); filter->channels = NULL; G_OBJECT_CLASS (parent_class)->dispose (object); gst_audio_chebyshev_freq_band_class_init (GstAudioChebyshevFreqBandClass * klass) GObjectClass *gobject_class; GstBaseTransformClass *trans_class; GstAudioFilterClass *filter_class; gobject_class = (GObjectClass *) klass; trans_class = (GstBaseTransformClass *) klass; filter_class = (GstAudioFilterClass *) klass; gobject_class->set_property = gst_audio_chebyshev_freq_band_set_property; gobject_class->get_property = gst_audio_chebyshev_freq_band_get_property; gobject_class->dispose = gst_audio_chebyshev_freq_band_dispose; g_object_class_install_property (gobject_class, PROP_MODE, g_param_spec_enum ("mode", "Mode", "Low pass or high pass mode", GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND_MODE, MODE_BAND_PASS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_TYPE, g_param_spec_int ("type", "Type", "Type of the chebychev filter", 1, 2, 1, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_LOWER_FREQUENCY, g_param_spec_float ("lower-frequency", "Lower frequency", "Start frequency of the band (Hz)", 0.0, G_MAXFLOAT, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_UPPER_FREQUENCY, g_param_spec_float ("upper-frequency", "Upper frequency", "Stop frequency of the band (Hz)", 0.0, G_MAXFLOAT, g_object_class_install_property (gobject_class, PROP_RIPPLE, g_param_spec_float ("ripple", "Ripple", "Amount of ripple (dB)", 0.0, G_MAXFLOAT, 0.25, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_object_class_install_property (gobject_class, PROP_POLES, g_param_spec_int ("poles", "Poles", "Number of poles to use, will be rounded up to the next multiply of four", 4, 32, 4, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); filter_class->setup = GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_band_setup); trans_class->transform_ip = GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_band_transform_ip); trans_class->start = GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_band_start); gst_audio_chebyshev_freq_band_init (GstAudioChebyshevFreqBand * filter, GstAudioChebyshevFreqBandClass * klass) filter->lower_frequency = filter->upper_frequency = 0.0; filter->mode = MODE_BAND_PASS; filter->type = 1; filter->poles = 4; filter->ripple = 0.25; gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE); filter->have_coeffs = FALSE; filter->num_a = 0; filter->num_b = 0; filter->channels = NULL; generate_biquad_coefficients (GstAudioChebyshevFreqBand * filter, gint p, gdouble * a0, gdouble * a1, gdouble * a2, gdouble * a3, gdouble * a4, gdouble * b1, gdouble * b2, gdouble * b3, gdouble * b4) gint np = filter->poles / 2; gdouble ripple = filter->ripple; /* pole location in s-plane */ gdouble rp, ip; /* zero location in s-plane */ gdouble rz = 0.0, iz = 0.0; /* transfer function coefficients for the z-plane */ gdouble x0, x1, x2, y1, y2; gint type = filter->type; /* Calculate pole location for lowpass at frequency 1 */ { gdouble angle = (M_PI / 2.0) * (2.0 * p - 1) / np; rp = -sin (angle); ip = cos (angle); /* If we allow ripple, move the pole from the unit * circle to an ellipse and keep cutoff at frequency 1 */ if (ripple > 0 && type == 1) { gdouble es, vx; es = sqrt (pow (10.0, ripple / 10.0) - 1.0); vx = (1.0 / np) * asinh (1.0 / es); rp = rp * sinh (vx); ip = ip * cosh (vx); } else if (type == 2) { vx = (1.0 / np) * asinh (es); /* Calculate inverse of the pole location to move from * type I to type II */ if (type == 2) { gdouble mag2 = rp * rp + ip * ip; rp /= mag2; ip /= mag2; /* Calculate zero location for frequency 1 on the * unit circle for type 2 */ gdouble angle = M_PI / (np * 2.0) + ((p - 1) * M_PI) / (np); gdouble mag2; rz = 0.0; iz = cos (angle); mag2 = rz * rz + iz * iz; rz /= mag2; iz /= mag2; /* Convert from s-domain to z-domain by * using the bilinear Z-transform, i.e. * substitute s by (2/t)*((z-1)/(z+1)) * with t = 2 * tan(0.5). */ if (type == 1) { gdouble t, m, d; t = 2.0 * tan (0.5); m = rp * rp + ip * ip; d = 4.0 - 4.0 * rp * t + m * t * t; x0 = (t * t) / d; x1 = 2.0 * x0; x2 = x0; y1 = (8.0 - 2.0 * m * t * t) / d; y2 = (-4.0 - 4.0 * rp * t - m * t * t) / d; } else { x0 = (t * t * iz * iz + 4.0) / d; x1 = (-8.0 + 2.0 * iz * iz * t * t) / d; /* Convert from lowpass at frequency 1 to either bandpass * or band reject. * * For bandpass substitute z^(-1) with: * -2 -1 * -z + alpha * z - beta * ---------------------------- * -2 -1 * beta * z - alpha * z + 1 * alpha = (2*a*b)/(1+b) * beta = (b-1)/(b+1) * a = cos((w1 + w0)/2) / cos((w1 - w0)/2) * b = tan(1/2) * cot((w1 - w0)/2) * For bandreject substitute z^(-1) with: * * -2 -1 * z - alpha * z + beta * alpha = (2*a)/(1+b) * beta = (1-b)/(1+b) * b = tan(1/2) * tan((w1 - w0)/2) gdouble a, b, d; gdouble alpha, beta; gdouble w0 = 2.0 * M_PI * (filter->lower_frequency / GST_AUDIO_FILTER (filter)->format.rate); gdouble w1 = 2.0 * M_PI * (filter->upper_frequency / if (filter->mode == MODE_BAND_PASS) { a = cos ((w1 + w0) / 2.0) / cos ((w1 - w0) / 2.0); b = tan (1.0 / 2.0) / tan ((w1 - w0) / 2.0); alpha = (2.0 * a * b) / (1.0 + b); beta = (b - 1.0) / (b + 1.0); d = 1.0 + beta * (y1 - beta * y2); *a0 = (x0 + beta * (-x1 + beta * x2)) / d; *a1 = (alpha * (-2.0 * x0 + x1 + beta * x1 - 2.0 * beta * x2)) / d; *a2 = (-x1 - beta * beta * x1 + 2.0 * beta * (x0 + x2) + alpha * alpha * (x0 - x1 + x2)) / d; *a3 = (alpha * (x1 + beta * (-2.0 * x0 + x1) - 2.0 * x2)) / d; *a4 = (beta * (beta * x0 - x1) + x2) / d; *b1 = (alpha * (2.0 + y1 + beta * y1 - 2.0 * beta * y2)) / d; *b2 = (-y1 - beta * beta * y1 - alpha * alpha * (1.0 + y1 - y2) + 2.0 * beta * (-1.0 + y2)) / d; *b3 = (alpha * (y1 + beta * (2.0 + y1) - 2.0 * y2)) / d; *b4 = (-beta * beta - beta * y1 + y2) / d; } else { b = tan (1.0 / 2.0) * tan ((w1 - w0) / 2.0); alpha = (2.0 * a) / (1.0 + b); beta = (1.0 - b) / (1.0 + b); d = -1.0 + beta * (beta * y2 + y1); *a0 = (-x0 - beta * x1 - beta * beta * x2) / d; *a1 = (alpha * (2.0 * x0 + x1 + beta * x1 + 2.0 * beta * x2)) / d; (-x1 - beta * beta * x1 - 2.0 * beta * (x0 + x2) - alpha * alpha * (x0 + x1 + x2)) / d; *a3 = (alpha * (x1 + beta * (2.0 * x0 + x1) + 2.0 * x2)) / d; *a4 = (-beta * beta * x0 - beta * x1 - x2) / d; *b1 = (alpha * (-2.0 + y1 + beta * y1 + 2.0 * beta * y2)) / d; -(y1 + beta * beta * y1 + 2.0 * beta * (-1.0 + y2) + alpha * alpha * (-1.0 + y1 + y2)) / d; *b3 = (alpha * (beta * (-2.0 + y1) + y1 + 2.0 * y2)) / d; *b4 = -(-beta * beta + beta * y1 + y2) / d; /* Evaluate the transfer function that corresponds to the IIR * coefficients at zr + zi*I and return the magnitude */ static gdouble calculate_gain (gdouble * a, gdouble * b, gint num_a, gint num_b, gdouble zr, gdouble zi) gdouble sum_ar, sum_ai; gdouble sum_br, sum_bi; gdouble gain_r, gain_i; gdouble sum_r_old; gdouble sum_i_old; gint i; sum_ar = 0.0; sum_ai = 0.0; for (i = num_a; i >= 0; i--) { sum_r_old = sum_ar; sum_i_old = sum_ai; sum_ar = (sum_r_old * zr - sum_i_old * zi) + a[i]; sum_ai = (sum_r_old * zi + sum_i_old * zr) + 0.0; sum_br = 0.0; sum_bi = 0.0; for (i = num_b; i >= 0; i--) { sum_r_old = sum_br; sum_i_old = sum_bi; sum_br = (sum_r_old * zr - sum_i_old * zi) - b[i]; sum_bi = (sum_r_old * zi + sum_i_old * zr) - 0.0; sum_br += 1.0; sum_bi += 0.0; gain_r = (sum_ar * sum_br + sum_ai * sum_bi) / (sum_br * sum_br + sum_bi * sum_bi); gain_i = (sum_ai * sum_br - sum_ar * sum_bi) / (sum_br * sum_br + sum_bi * sum_bi); return (sqrt (gain_r * gain_r + gain_i * gain_i)); generate_coefficients (GstAudioChebyshevFreqBand * filter) gint channels = GST_AUDIO_FILTER (filter)->format.channels; gint i; if (GST_AUDIO_FILTER (filter)->format.rate == 0) { filter->num_a = 1; filter->a = g_new0 (gdouble, 1); filter->a[0] = 1.0; filter->num_b = 0; filter->channels = g_new0 (GstAudioChebyshevFreqBandChannelCtx, channels); GST_LOG_OBJECT (filter, "rate was not set yet"); return; filter->have_coeffs = TRUE; if (filter->upper_frequency <= filter->lower_frequency) { filter->a[0] = (filter->mode == MODE_BAND_PASS) ? 0.0 : 1.0; GST_LOG_OBJECT (filter, "frequency band had no or negative dimension"); if (filter->upper_frequency > GST_AUDIO_FILTER (filter)->format.rate / 2) { filter->upper_frequency = GST_AUDIO_FILTER (filter)->format.rate / 2; GST_LOG_OBJECT (filter, "clipped upper frequency to nyquist frequency"); if (filter->lower_frequency < 0.0) { filter->lower_frequency = 0.0; GST_LOG_OBJECT (filter, "clipped lower frequency to 0.0"); /* Calculate coefficients for the chebyshev filter */ gint np = filter->poles; gdouble *a, *b; gint i, p; filter->num_a = np + 1; filter->a = a = g_new0 (gdouble, np + 5); filter->num_b = np + 1; filter->b = b = g_new0 (gdouble, np + 5); GstAudioChebyshevFreqBandChannelCtx *ctx = &filter->channels[i]; ctx->x = g_new0 (gdouble, np + 1); ctx->y = g_new0 (gdouble, np + 1); /* Calculate transfer function coefficients */ a[4] = 1.0; b[4] = 1.0; for (p = 1; p <= np / 4; p++) { gdouble a0, a1, a2, a3, a4, b1, b2, b3, b4; gdouble *ta = g_new0 (gdouble, np + 5); gdouble *tb = g_new0 (gdouble, np + 5); generate_biquad_coefficients (filter, p, &a0, &a1, &a2, &a3, &a4, &b1, &b2, &b3, &b4); memcpy (ta, a, sizeof (gdouble) * (np + 5)); memcpy (tb, b, sizeof (gdouble) * (np + 5)); /* add the new coefficients for the new two poles * to the cascade by multiplication of the transfer * functions */ for (i = 4; i < np + 5; i++) { a[i] = a0 * ta[i] + a1 * ta[i - 1] + a2 * ta[i - 2] + a3 * ta[i - 3] + a4 * ta[i - 4]; b[i] = tb[i] - b1 * tb[i - 1] - b2 * tb[i - 2] - b3 * tb[i - 3] - b4 * tb[i - 4]; } g_free (ta); g_free (tb); /* Move coefficients to the beginning of the array * and multiply the b coefficients with -1 to move from * the transfer function's coefficients to the difference * equation's coefficients */ b[4] = 0.0; for (i = 0; i <= np; i++) { a[i] = a[i + 4]; b[i] = -b[i + 4]; /* Normalize to unity gain at frequency 0 and frequency * 0.5 for bandreject and unity gain at band center frequency * for bandpass */ if (filter->mode == MODE_BAND_REJECT) { /* gain is sqrt(H(0)*H(0.5)) */ gdouble gain1 = calculate_gain (a, b, np, np, 1.0, 0.0); gdouble gain2 = calculate_gain (a, b, np, np, -1.0, 0.0); gain1 = sqrt (gain1 * gain2); for (i = 0; i <= np; i++) { a[i] /= gain1; /* gain is H(wc), wc = center frequency */ gdouble w1 = 2.0 * M_PI * (filter->lower_frequency / GST_AUDIO_FILTER (filter)->format.rate); gdouble w2 = 2.0 * M_PI * (filter->upper_frequency / gdouble w0 = (w2 + w1) / 2.0; gdouble zr = cos (w0), zi = sin (w0); gdouble gain = calculate_gain (a, b, np, np, zr, zi); a[i] /= gain; GST_LOG_OBJECT (filter, "Generated IIR coefficients for the Chebyshev filter"); "mode: %s, type: %d, poles: %d, lower-frequency: %.2f Hz, upper-frequency: %.2f Hz, ripple: %.2f dB", (filter->mode == MODE_BAND_PASS) ? "band-pass" : "band-reject", filter->type, filter->poles, filter->lower_frequency, filter->upper_frequency, filter->ripple); GST_LOG_OBJECT (filter, "%.2f dB gain @ 0Hz", 20.0 * log10 (calculate_gain (a, b, np, np, 1.0, 0.0))); { gdouble zr, zi; zr = cos (w1); zi = sin (w1); GST_LOG_OBJECT (filter, "%.2f dB gain @ %dHz", 20.0 * log10 (calculate_gain (a, b, np, np, zr, zi)), (int) filter->lower_frequency); zr = cos (w0); zi = sin (w0); (int) ((filter->lower_frequency + filter->upper_frequency) / 2.0)); zr = cos (w2); zi = sin (w2); (int) filter->upper_frequency); GST_LOG_OBJECT (filter, "%.2f dB gain @ %dHz", 20.0 * log10 (calculate_gain (a, b, np, np, -1.0, 0.0)), GST_AUDIO_FILTER (filter)->format.rate / 2); gst_audio_chebyshev_freq_band_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) switch (prop_id) { case PROP_MODE: GST_BASE_TRANSFORM_LOCK (filter); filter->mode = g_value_get_enum (value); generate_coefficients (filter); GST_BASE_TRANSFORM_UNLOCK (filter); break; case PROP_TYPE: filter->type = g_value_get_int (value); case PROP_LOWER_FREQUENCY: filter->lower_frequency = g_value_get_float (value); case PROP_UPPER_FREQUENCY: filter->upper_frequency = g_value_get_float (value); case PROP_RIPPLE: filter->ripple = g_value_get_float (value); case PROP_POLES: filter->poles = GST_ROUND_UP_4 (g_value_get_int (value)); default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); gst_audio_chebyshev_freq_band_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) g_value_set_enum (value, filter->mode); g_value_set_int (value, filter->type); g_value_set_float (value, filter->lower_frequency); g_value_set_float (value, filter->upper_frequency); g_value_set_float (value, filter->ripple); g_value_set_int (value, filter->poles); /* GstAudioFilter vmethod implementations */ static gboolean gst_audio_chebyshev_freq_band_setup (GstAudioFilter * base, GstRingBufferSpec * format) GstAudioChebyshevFreqBand *filter = GST_AUDIO_CHEBYSHEV_FREQ_BAND (base); gboolean ret = TRUE; if (format->width == 32) filter->process = (GstAudioChebyshevFreqBandProcessFunc) process_32; else if (format->width == 64) process_64; else ret = FALSE; return ret; static inline gdouble process (GstAudioChebyshevFreqBand * filter, GstAudioChebyshevFreqBandChannelCtx * ctx, gdouble x0) gdouble val = filter->a[0] * x0; gint i, j; for (i = 1, j = ctx->x_pos; i < filter->num_a; i++) { val += filter->a[i] * ctx->x[j]; j--; if (j < 0) j = filter->num_a - 1; for (i = 1, j = ctx->y_pos; i < filter->num_b; i++) { val += filter->b[i] * ctx->y[j]; j = filter->num_b - 1; if (ctx->x) { ctx->x_pos++; if (ctx->x_pos > filter->num_a - 1) ctx->x_pos = 0; ctx->x[ctx->x_pos] = x0; if (ctx->y) { ctx->y_pos++; if (ctx->y_pos > filter->num_b - 1) ctx->y_pos = 0; ctx->y[ctx->y_pos] = val; return val; process_64 (GstAudioChebyshevFreqBand * filter, gdouble * data, guint num_samples) gint i, j, channels = GST_AUDIO_FILTER (filter)->format.channels; gdouble val; for (i = 0; i < num_samples / channels; i++) { for (j = 0; j < channels; j++) { val = process (filter, &filter->channels[j], *data); *data++ = val; process_32 (GstAudioChebyshevFreqBand * filter, gfloat * data, guint num_samples) /* GstBaseTransform vmethod implementations */ GstBuffer * buf) guint num_samples = GST_BUFFER_SIZE (buf) / (GST_AUDIO_FILTER (filter)->format.width / 8); if (!gst_buffer_is_writable (buf)) return GST_FLOW_OK; if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buf))) gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (buf)); if (!filter->have_coeffs) generate_coefficients (filter); filter->process (filter, GST_BUFFER_DATA (buf), num_samples); return GST_FLOW_OK; gst_audio_chebyshev_freq_band_start (GstBaseTransform * base) GstAudioChebyshevFreqBandChannelCtx *ctx; /* Reset the history of input and output values if * already existing */ if (channels && filter->channels) { if (ctx->x) memset (ctx->x, 0, (filter->poles + 1) * sizeof (gdouble)); if (ctx->y) memset (ctx->y, 0, (filter->poles + 1) * sizeof (gdouble)); return TRUE; --- NEW FILE: audiochebyshevfreqband.h --- #ifndef __GST_AUDIO_CHEBYSHEV_FREQ_BAND_H__ #define __GST_AUDIO_CHEBYSHEV_FREQ_BAND_H__ G_BEGIN_DECLS #define GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND (gst_audio_chebyshev_freq_band_get_type()) #define GST_AUDIO_CHEBYSHEV_FREQ_BAND(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND,GstAudioChebyshevFreqBand)) #define GST_IS_AUDIO_CHEBYSHEV_FREQ_BAND(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND)) #define GST_AUDIO_CHEBYSHEV_FREQ_BAND_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND,GstAudioChebyshevFreqBandClass)) #define GST_IS_AUDIO_CHEBYSHEV_FREQ_BAND_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND)) #define GST_AUDIO_CHEBYSHEV_FREQ_BAND_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND,GstAudioChebyshevFreqBandClass)) typedef struct _GstAudioChebyshevFreqBand GstAudioChebyshevFreqBand; typedef struct _GstAudioChebyshevFreqBandClass GstAudioChebyshevFreqBandClass; typedef void (*GstAudioChebyshevFreqBandProcessFunc) (GstAudioChebyshevFreqBand *, guint8 *, guint); typedef struct gdouble *x; gint x_pos; gdouble *y; gint y_pos; } GstAudioChebyshevFreqBandChannelCtx; struct _GstAudioChebyshevFreqBand GstAudioFilter audiofilter; gint mode; gint type; gint poles; gfloat lower_frequency; gfloat upper_frequency; gfloat ripple; /* < private > */ GstAudioChebyshevFreqBandProcessFunc process; gboolean have_coeffs; gdouble *a; gint num_a; gdouble *b; gint num_b; GstAudioChebyshevFreqBandChannelCtx *channels; struct _GstAudioChebyshevFreqBandClass GstAudioFilterClass parent; GType gst_audio_chebyshev_freq_band_get_type (void); G_END_DECLS #endif /* __GST_AUDIO_CHEBYSHEV_FREQ_BAND_H__ */ --- NEW FILE: audiochebyshevfreqlimit.c --- * SECTION:element-audiochebyshevfreqlimit * @short_description: Chebyshev low pass and high pass filter * Attenuates all frequencies above the cutoff frequency (low-pass) or all frequencies below the * cutoff frequency (high-pass). The number of poles and the ripple parameter control the rolloff. * gst-launch audiotestsrc freq=1500 ! audioconvert ! audiochebyshevfreqlimit mode=low-pass cutoff=1000 poles=4 ! audioconvert ! alsasink * gst-launch filesrc location="melo1.ogg" ! oggdemux ! vorbisdec ! audioconvert ! audiochebyshevfreqlimit mode=high-pass cutoff=400 ripple=0.2 ! audioconvert ! alsasink * gst-launch audiotestsrc wave=white-noise ! audioconvert ! audiochebyshevfreqlimit mode=low-pass cutoff=800 type=2 ! audioconvert ! alsasink #include "audiochebyshevfreqlimit.h" #define GST_CAT_DEFAULT gst_audio_chebyshev_freq_limit_debug GST_ELEMENT_DETAILS ("AudioChebyshevFreqLimit", "Chebyshev low pass and high pass filter", PROP_CUTOFF, GST_DEBUG_CATEGORY_INIT (gst_audio_chebyshev_freq_limit_debug, "audiochebyshevfreqlimit", 0, "audiochebyshevfreqlimit element"); GST_BOILERPLATE_FULL (GstAudioChebyshevFreqLimit, gst_audio_chebyshev_freq_limit, GstAudioFilter, GST_TYPE_AUDIO_FILTER, DEBUG_INIT); static void gst_audio_chebyshev_freq_limit_set_property (GObject * object, static void gst_audio_chebyshev_freq_limit_get_property (GObject * object, static gboolean gst_audio_chebyshev_freq_limit_setup (GstAudioFilter * filter, gst_audio_chebyshev_freq_limit_transform_ip (GstBaseTransform * base, static gboolean gst_audio_chebyshev_freq_limit_start (GstBaseTransform * base); static void process_64 (GstAudioChebyshevFreqLimit * filter, static void process_32 (GstAudioChebyshevFreqLimit * filter, MODE_LOW_PASS = 0, MODE_HIGH_PASS #define GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT_MODE (gst_audio_chebyshev_freq_limit_mode_get_type ()) gst_audio_chebyshev_freq_limit_mode_get_type (void) {MODE_LOW_PASS, "Low pass (default)", "low-pass"}, {MODE_HIGH_PASS, "High pass", "high-pass"}, gtype = g_enum_register_static ("GstAudioChebyshevFreqLimitMode", values); gst_audio_chebyshev_freq_limit_base_init (gpointer klass) gst_audio_chebyshev_freq_limit_dispose (GObject * object) GstAudioChebyshevFreqLimit *filter = GST_AUDIO_CHEBYSHEV_FREQ_LIMIT (object); GstAudioChebyshevFreqLimitChannelCtx *ctx; gst_audio_chebyshev_freq_limit_class_init (GstAudioChebyshevFreqLimitClass * gobject_class->set_property = gst_audio_chebyshev_freq_limit_set_property; gobject_class->get_property = gst_audio_chebyshev_freq_limit_get_property; gobject_class->dispose = gst_audio_chebyshev_freq_limit_dispose; "Low pass or high pass mode", GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT_MODE, MODE_LOW_PASS, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_param_spec_int ("type", "Type", "Type of the chebychev filter", 1, 2, 1, g_object_class_install_property (gobject_class, PROP_CUTOFF, g_param_spec_float ("cutoff", "Cutoff", "Cut off frequency (Hz)", 0.0, G_MAXFLOAT, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); g_param_spec_float ("ripple", "Ripple", "Amount of ripple (dB)", 0.0, G_MAXFLOAT, 0.25, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); "Number of poles to use, will be rounded up to the next even number", 2, 32, 4, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE)); filter_class->setup = GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_limit_setup); GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_limit_transform_ip); trans_class->start = GST_DEBUG_FUNCPTR (gst_audio_chebyshev_freq_limit_start); gst_audio_chebyshev_freq_limit_init (GstAudioChebyshevFreqLimit * filter, GstAudioChebyshevFreqLimitClass * klass) filter->cutoff = 0.0; filter->mode = MODE_LOW_PASS; generate_biquad_coefficients (GstAudioChebyshevFreqLimit * filter, gint p, gdouble * a0, gdouble * a1, gdouble * a2, gdouble * b1, gdouble * b2) gint np = filter->poles; /* Calculate inverse of the pole location to convert from /* Convert from lowpass at frequency 1 to either lowpass * or highpass. * For lowpass substitute z^(-1) with: * -1 * z - k * ------------ * -1 * 1 - k * z * k = sin((1-w)/2) / sin((1+w)/2) * For highpass substitute z^(-1) with: * -1 * -z - k * 1 + k * z * k = -cos((1+w)/2) / cos((1-w)/2) gdouble k, d; gdouble omega = 2.0 * M_PI * (filter->cutoff / GST_AUDIO_FILTER (filter)->format.rate); if (filter->mode == MODE_LOW_PASS) k = sin ((1.0 - omega) / 2.0) / sin ((1.0 + omega) / 2.0); else k = -cos ((omega + 1.0) / 2.0) / cos ((omega - 1.0) / 2.0); d = 1.0 + y1 * k - y2 * k * k; *a0 = (x0 + k * (-x1 + k * x2)) / d; *a1 = (x1 + k * k * x1 - 2.0 * k * (x0 + x2)) / d; *a2 = (x0 * k * k - x1 * k + x2) / d; *b1 = (2.0 * k + y1 + y1 * k * k - 2.0 * y2 * k) / d; *b2 = (-k * k - y1 * k + y2) / d; if (filter->mode == MODE_HIGH_PASS) { *a1 = -*a1; *b1 = -*b1; generate_coefficients (GstAudioChebyshevFreqLimit * filter) filter->channels = g_new0 (GstAudioChebyshevFreqLimitChannelCtx, channels); if (filter->cutoff >= GST_AUDIO_FILTER (filter)->format.rate / 2.0) { filter->a[0] = (filter->mode == MODE_LOW_PASS) ? 1.0 : 0.0; GST_LOG_OBJECT (filter, "cutoff was higher than nyquist frequency"); } else if (filter->cutoff <= 0.0) { filter->a[0] = (filter->mode == MODE_LOW_PASS) ? 0.0 : 1.0; GST_LOG_OBJECT (filter, "cutoff is lower than zero"); filter->a = a = g_new0 (gdouble, np + 3); filter->b = b = g_new0 (gdouble, np + 3); GstAudioChebyshevFreqLimitChannelCtx *ctx = &filter->channels[i]; a[2] = 1.0; b[2] = 1.0; for (p = 1; p <= np / 2; p++) { gdouble a0, a1, a2, b1, b2; gdouble *ta = g_new0 (gdouble, np + 3); gdouble *tb = g_new0 (gdouble, np + 3); generate_biquad_coefficients (filter, p, &a0, &a1, &a2, &b1, &b2); memcpy (ta, a, sizeof (gdouble) * (np + 3)); memcpy (tb, b, sizeof (gdouble) * (np + 3)); for (i = 2; i < np + 3; i++) { a[i] = a0 * ta[i] + a1 * ta[i - 1] + a2 * ta[i - 2]; b[i] = tb[i] - b1 * tb[i - 1] - b2 * tb[i - 2]; b[2] = 0.0; a[i] = a[i + 2]; b[i] = -b[i + 2]; /* Normalize to unity gain at frequency 0 for lowpass * and frequency 0.5 for highpass */ gdouble gain; if (filter->mode == MODE_LOW_PASS) gain = calculate_gain (a, b, np, np, 1.0, 0.0); else gain = calculate_gain (a, b, np, np, -1.0, 0.0); "mode: %s, type: %d, poles: %d, cutoff: %.2f Hz, ripple: %.2f dB", (filter->mode == MODE_LOW_PASS) ? "low-pass" : "high-pass", filter->type, filter->poles, filter->cutoff, filter->ripple); GST_LOG_OBJECT (filter, "%.2f dB gain @ 0 Hz", gdouble wc = 2.0 * M_PI * (filter->cutoff / gdouble zr = cos (wc), zi = sin (wc); GST_LOG_OBJECT (filter, "%.2f dB gain @ %d Hz", (int) filter->cutoff); GST_LOG_OBJECT (filter, "%.2f dB gain @ %d Hz", gst_audio_chebyshev_freq_limit_set_property (GObject * object, guint prop_id, case PROP_CUTOFF: filter->cutoff = g_value_get_float (value); filter->poles = GST_ROUND_UP_2 (g_value_get_int (value)); gst_audio_chebyshev_freq_limit_get_property (GObject * object, guint prop_id, g_value_set_float (value, filter->cutoff); gst_audio_chebyshev_freq_limit_setup (GstAudioFilter * base, GstAudioChebyshevFreqLimit *filter = GST_AUDIO_CHEBYSHEV_FREQ_LIMIT (base); filter->process = (GstAudioChebyshevFreqLimitProcessFunc) process (GstAudioChebyshevFreqLimit * filter, GstAudioChebyshevFreqLimitChannelCtx * ctx, gdouble x0) process_64 (GstAudioChebyshevFreqLimit * filter, process_32 (GstAudioChebyshevFreqLimit * filter, gst_audio_chebyshev_freq_limit_start (GstBaseTransform * base) GstAudioChebyshevFreqLimitChannelCtx *ctx; --- NEW FILE: audiochebyshevfreqlimit.h --- #ifndef __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__ #define __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__ #define GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT (gst_audio_chebyshev_freq_limit_get_type()) #define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimit)) #define GST_IS_AUDIO_CHEBYSHEV_FREQ_LIMIT(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT)) #define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimitClass)) #define GST_IS_AUDIO_CHEBYSHEV_FREQ_LIMIT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT)) #define GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT,GstAudioChebyshevFreqLimitClass)) typedef struct _GstAudioChebyshevFreqLimit GstAudioChebyshevFreqLimit; typedef struct _GstAudioChebyshevFreqLimitClass GstAudioChebyshevFreqLimitClass; typedef void (*GstAudioChebyshevFreqLimitProcessFunc) (GstAudioChebyshevFreqLimit *, guint8 *, guint); } GstAudioChebyshevFreqLimitChannelCtx; struct _GstAudioChebyshevFreqLimit gfloat cutoff; GstAudioChebyshevFreqLimitProcessFunc process; GstAudioChebyshevFreqLimitChannelCtx *channels; struct _GstAudioChebyshevFreqLimitClass GType gst_audio_chebyshev_freq_limit_get_type (void); #endif /* __GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_H__ */ Index: audiofx.c RCS file: /cvs/gstreamer/gst-plugins-good/gst/audiofx/audiofx.c,v retrieving revision 1.5 diff -u -d -r1.5 -r1.6 --- audiofx.c 8 Mar 2007 10:02:12 -0000 1.5 +++ audiofx.c 16 Aug 2007 17:02:06 -0000 1.6 @@ -29,6 +29,8 @@ #include "audioinvert.h" #include "audioamplify.h" #include "audiodynamic.h" +#include "audiochebyshevfreqlimit.h" +#include "audiochebyshevfreqband.h" /* entry point to initialize the plug-in * initialize the plug-in itself @@ -48,7 +50,11 @@ gst_element_register (plugin, "audioamplify", GST_RANK_NONE, GST_TYPE_AUDIO_AMPLIFY) && gst_element_register (plugin, "audiodynamic", GST_RANK_NONE, - GST_TYPE_AUDIO_DYNAMIC)); + GST_TYPE_AUDIO_DYNAMIC) && + gst_element_register (plugin, "audiochebyshevfreqlimit", GST_RANK_NONE, + GST_TYPE_AUDIO_CHEBYSHEV_FREQ_LIMIT) && + gst_element_register (plugin, "audiochebyshevfreqband", GST_RANK_NONE, + GST_TYPE_AUDIO_CHEBYSHEV_FREQ_BAND)); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, Index: .cvsignore RCS file: /cvs/gstreamer/gst-plugins-good/tests/check/elements/.cvsignore,v retrieving revision 1.16 retrieving revision 1.17 diff -u -d -r1.16 -r1.17 --- .cvsignore 14 Jun 2007 14:03:41 -0000 1.16 +++ .cvsignore 16 Aug 2007 17:02:07 -0000 1.17 @@ -3,6 +3,8 @@ audioamplify audiodynamic audioinvert +audiochebyshevfreqband +audiochebyshevfreqlimit level matroskamux cmmldec /* GStreamer * audiochebyshevfreqband.c: Unit test for the audiochebyshevfreqband element * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * Lesser General Public License for more details. * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA #include <gst/check/gstcheck.h> /* For ease of programming we use globals to keep refs for our floating * src and sink pads we create; otherwise we always have to do get_pad, * get_peer, and then remove references in every test function */ GstPad *mysrcpad, *mysinkpad; #define CAPS_STRING \ "audio/x-raw-float, " \ "channels = (int) 1, " \ "rate = (int) 44100, " \ "endianness = (int) BYTE_ORDER, " \ "width = (int) 64" \ static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw-float, " "channels = (int) 1, " "rate = (int) 44100, " "endianness = (int) BYTE_ORDER, " "width = (int) 64") ); static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GstElement * setup_audiochebyshevfreqband () GstElement *audiochebyshevfreqband; GST_DEBUG ("setup_audiochebyshevfreqband"); audiochebyshevfreqband = gst_check_setup_element ("audiochebyshevfreqband"); mysrcpad = gst_check_setup_src_pad (audiochebyshevfreqband, &srctemplate, NULL); mysinkpad = gst_check_setup_sink_pad (audiochebyshevfreqband, &sinktemplate, NULL); gst_pad_set_active (mysrcpad, TRUE); gst_pad_set_active (mysinkpad, TRUE); return audiochebyshevfreqband; void cleanup_audiochebyshevfreqband (GstElement * audiochebyshevfreqband) GST_DEBUG ("cleanup_audiochebyshevfreqband"); g_list_foreach (buffers, (GFunc) gst_mini_object_unref, NULL); g_list_free (buffers); buffers = NULL; gst_pad_set_active (mysrcpad, FALSE); gst_pad_set_active (mysinkpad, FALSE); gst_check_teardown_src_pad (audiochebyshevfreqband); gst_check_teardown_sink_pad (audiochebyshevfreqband); gst_check_teardown_element (audiochebyshevfreqband); /* Test if data containing only one frequency component * at 0 is erased with bandpass mode and a * 2000Hz frequency band around rate/4 */ GST_START_TEST (test_bp_0hz) GstBuffer *inbuffer, *outbuffer; gdouble *in, *res, rms; audiochebyshevfreqband = setup_audiochebyshevfreqband (); /* Set to bandpass */ g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 0, NULL); g_object_set (G_OBJECT (audiochebyshevfreqband), "poles", 8, NULL); g_object_set (G_OBJECT (audiochebyshevfreqband), "type", 1, NULL); g_object_set (G_OBJECT (audiochebyshevfreqband), "ripple", 0.25, NULL); fail_unless (gst_element_set_state (audiochebyshevfreqband, GST_STATE_PLAYING) == GST_STATE_CHANGE_SUCCESS, "could not set to playing"); g_object_set (G_OBJECT (audiochebyshevfreqband), "lower-frequency", 44100 / 4.0 - 1000, NULL); g_object_set (G_OBJECT (audiochebyshevfreqband), "upper-frequency", 44100 / 4.0 + 1000, NULL); inbuffer = gst_buffer_new_and_alloc (1024 * sizeof (gdouble)); in = (gdouble *) GST_BUFFER_DATA (inbuffer); for (i = 0; i < 1024; i++) in[i] = 1.0; caps = gst_caps_from_string (CAPS_STRING); gst_buffer_set_caps (inbuffer, caps); ASSERT_BUFFER_REFCOUNT (inbuffer, "inbuffer", 1); /* pushing gives away my reference ... */ fail_unless (gst_pad_push (mysrcpad, inbuffer) == GST_FLOW_OK); /* ... and puts a new buffer on the global list */ fail_unless_equals_int (g_list_length (buffers), 1); fail_if ((outbuffer = (GstBuffer *) buffers->data) == NULL); res = (gdouble *) GST_BUFFER_DATA (outbuffer); rms = 0.0; rms += res[i] * res[i]; rms = sqrt (rms / 1024.0); fail_unless (rms <= 0.1); /* cleanup */ cleanup_audiochebyshevfreqband (audiochebyshevfreqband); GST_END_TEST; * at band center is preserved with bandpass mode and a GST_START_TEST (test_bp_11025hz) for (i = 0; i < 1024; i += 4) { in[i] = 0.0; in[i + 1] = 1.0; in[i + 2] = 0.0; in[i + 3] = -1.0; fail_unless (rms >= 0.6); * at rate/2 is erased with bandpass mode and a GST_START_TEST (test_bp_22050hz) for (i = 0; i < 1024; i += 2) { in[i + 1] = -1.0; * at 0 is preserved with bandreject mode and a GST_START_TEST (test_br_0hz) /* Set to bandreject */ g_object_set (G_OBJECT (audiochebyshevfreqband), "mode", 1, NULL); fail_unless (rms >= 0.9); * at band center is erased with bandreject mode and a GST_START_TEST (test_br_11025hz) * at rate/2 is preserved with bandreject mode and a GST_START_TEST (test_br_22050hz) Suite * audiochebyshevfreqband_suite (void) Suite *s = suite_create ("audiochebyshevfreqband"); TCase *tc_chain = tcase_create ("general"); suite_add_tcase (s, tc_chain); tcase_add_test (tc_chain, test_bp_0hz); tcase_add_test (tc_chain, test_bp_11025hz); tcase_add_test (tc_chain, test_bp_22050hz); tcase_add_test (tc_chain, test_br_0hz); tcase_add_test (tc_chain, test_br_11025hz); tcase_add_test (tc_chain, test_br_22050hz); return s; int main (int argc, char **argv) int nf; Suite *s = audiochebyshevfreqband_suite (); SRunner *sr = srunner_create (s); gst_check_init (&argc, &argv); srunner_run_all (sr, CK_NORMAL); nf = srunner_ntests_failed (sr); srunner_free (sr); return nf; * audiochebyshevfreqlimit.c: Unit test for the audiochebyshevfreqlimit element setup_audiochebyshevfreqlimit () GstElement *audiochebyshevfreqlimit; GST_DEBUG ("setup_audiochebyshevfreqlimit"); audiochebyshevfreqlimit = gst_check_setup_element ("audiochebyshevfreqlimit"); gst_check_setup_src_pad (audiochebyshevfreqlimit, &srctemplate, NULL); gst_check_setup_sink_pad (audiochebyshevfreqlimit, &sinktemplate, NULL); return audiochebyshevfreqlimit; cleanup_audiochebyshevfreqlimit (GstElement * audiochebyshevfreqlimit) GST_DEBUG ("cleanup_audiochebyshevfreqlimit"); gst_check_teardown_src_pad (audiochebyshevfreqlimit); gst_check_teardown_sink_pad (audiochebyshevfreqlimit); gst_check_teardown_element (audiochebyshevfreqlimit); * at 0 is preserved with lowpass mode and a cutoff * at rate/4 */ GST_START_TEST (test_lp_0hz) audiochebyshevfreqlimit = setup_audiochebyshevfreqlimit (); /* Set to lowpass */ g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 0, NULL); g_object_set (G_OBJECT (audiochebyshevfreqlimit), "poles", 8, NULL); g_object_set (G_OBJECT (audiochebyshevfreqlimit), "type", 1, NULL); g_object_set (G_OBJECT (audiochebyshevfreqlimit), "ripple", 0.25, NULL); fail_unless (gst_element_set_state (audiochebyshevfreqlimit, g_object_set (G_OBJECT (audiochebyshevfreqlimit), "cutoff", 44100 / 4.0, NULL); inbuffer = gst_buffer_new_and_alloc (128 * sizeof (gdouble)); for (i = 0; i < 128; i++) rms = sqrt (rms / 128.0); cleanup_audiochebyshevfreqlimit (audiochebyshevfreqlimit); * at rate/2 is erased with lowpass mode and a cutoff GST_START_TEST (test_lp_22050hz) for (i = 0; i < 128; i += 2) { * at 0 is erased with highpass mode and a cutoff GST_START_TEST (test_hp_0hz) /* Set to highpass */ g_object_set (G_OBJECT (audiochebyshevfreqlimit), "mode", 1, NULL); * at rate/2 is preserved with highpass mode and a cutoff GST_START_TEST (test_hp_22050hz) audiochebyshevfreqlimit_suite (void) Suite *s = suite_create ("audiochebyshevfreqlimit"); tcase_add_test (tc_chain, test_lp_0hz); tcase_add_test (tc_chain, test_lp_22050hz); tcase_add_test (tc_chain, test_hp_0hz); tcase_add_test (tc_chain, test_hp_22050hz); Suite *s = audiochebyshevfreqlimit_suite (); RCS file: /cvs/gstreamer/gst-plugins-good/tests/check/Makefile.am,v retrieving revision 1.38 retrieving revision 1.39 diff -u -d -r1.38 -r1.39 --- Makefile.am 19 Jun 2007 16:40:40 -0000 1.38 +++ Makefile.am 16 Aug 2007 17:02:06 -0000 1.39 @@ -55,6 +55,8 @@ elements/alphacolor \ elements/audiopanorama \ elements/audioinvert \ + elements/audiochebyshevfreqband \ + elements/audiochebyshevfreqlimit \ elements/audioamplify \ elements/audiodynamic \ elements/avimux \ RCS file: /cvs/gstreamer/gst-plugins-good/docs/plugins/Makefile.am,v retrieving revision 1.44 retrieving revision 1.45 diff -u -d -r1.44 -r1.45 --- Makefile.am 18 Jul 2007 09:21:23 -0000 1.44 +++ Makefile.am 16 Aug 2007 17:02:07 -0000 1.45 @@ -100,6 +100,8 @@ $(top_srcdir)/gst/audiofx/audiodynamic.h \ $(top_srcdir)/gst/audiofx/audioinvert.h \ $(top_srcdir)/gst/audiofx/audiopanorama.h \ + $(top_srcdir)/gst/audiofx/audiochebyshevfreqlimit.h \ + $(top_srcdir)/gst/audiofx/audiochebyshevfreqband.h \ $(top_srcdir)/gst/autodetect/gstautoaudiosink.h \ $(top_srcdir)/gst/autodetect/gstautovideosink.h \ $(top_srcdir)/gst/avi/gstavidemux.h \ Index: gst-plugins-good-plugins-docs.sgml RCS file: /cvs/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins-docs.sgml,v retrieving revision 1.48 retrieving revision 1.49 diff -u -d -r1.48 -r1.49 --- gst-plugins-good-plugins-docs.sgml 18 Jul 2007 09:21:23 -0000 1.48 +++ gst-plugins-good-plugins-docs.sgml 16 Aug 2007 17:02:07 -0000 1.49 @@ -19,6 +19,8 @@ <xi:include href="xml/element-audioinvert.xml" /> <xi:include href="xml/element-audioamplify.xml" /> <xi:include href="xml/element-audiodynamic.xml" /> + <xi:include href="xml/element-audiochebyshevfreqlimit.xml" /> + <xi:include href="xml/element-audiochebyshevfreqband.xml" /> <xi:include href="xml/element-autoaudiosink.xml" /> <xi:include href="xml/element-autovideosink.xml" /> <xi:include href="xml/element-avidemux.xml" /> Index: gst-plugins-good-plugins-sections.txt RCS file: /cvs/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins-sections.txt,v --- gst-plugins-good-plugins-sections.txt 18 Jul 2007 09:21:23 -0000 1.44 +++ gst-plugins-good-plugins-sections.txt 16 Aug 2007 17:02:07 -0000 1.45 @@ -82,6 +82,26 @@ </SECTION> <SECTION> +<FILE>element-audiochebyshevfreqlimit</FILE> +<TITLE>audiochebyshevfreqlimit</TITLE> +GstAudioChebyshevFreqLimit +<SUBSECTION Standard> +GstAudioChebyshevFreqLimitClass +GST_AUDIO_CHEBYSHEV_FREQ_LIMIT +GST_AUDIO_CHEBYSHEV_FREQ_LIMIT_CLASS +</SECTION> +<SECTION> +<FILE>element-audiochebyshevfreqband</FILE> +<TITLE>audiochebyshevfreqband</TITLE> +GstAudioChebyshevFreqBand +GstAudioChebyshevFreqBandClass +GST_AUDIO_CHEBYSHEV_FREQ_BAND +GST_AUDIO_CHEBYSHEV_FREQ_BAND_CLASS <FILE>element-autoaudiosink</FILE> <TITLE>autoaudiosink</TITLE> GstAutoAudioSink Index: gst-plugins-good-plugins.args RCS file: /cvs/gstreamer/gst-plugins-good/docs/plugins/gst-plugins-good-plugins.args,v retrieving revision 1.25 retrieving revision 1.26 diff -u -d -r1.25 -r1.26 --- gst-plugins-good-plugins.args 25 Jun 2007 12:46:08 -0000 1.25 +++ gst-plugins-good-plugins.args 16 Aug 2007 17:02:07 -0000 1.26 @@ -401,21 +401,21 @@ <ARG> <NAME>GstVertigoTV::speed</NAME> <TYPE>gfloat</TYPE> -<RANGE>[0,01,100]</RANGE> +<RANGE>[0.01,100]</RANGE> <FLAGS>rw</FLAGS> <NICK>Speed</NICK> <BLURB>Control the speed of movement.</BLURB> -<DEFAULT>0,02</DEFAULT> +<DEFAULT>0.02</DEFAULT> </ARG> <NAME>GstVertigoTV::zoom-speed</NAME> -<RANGE>[1,01,1,1]</RANGE> +<RANGE>[1.01,1.1]</RANGE> <NICK>Zoom Speed</NICK> <BLURB>Control the rate of zooming.</BLURB> -<DEFAULT>1,01</DEFAULT> +<DEFAULT>1.01</DEFAULT> @@ -1141,7 +1141,7 @@ <NAME>GstDV1394Src::port</NAME> <TYPE>gint</TYPE> -<RANGE>[G_MAXULONG,16]</RANGE> +<RANGE>[-1,16]</RANGE> <NICK>Port</NICK> <BLURB>Port number (-1 automatic).</BLURB> @@ -17241,7 +17241,7 @@ <NAME>GstGamma::gamma</NAME> <TYPE>gdouble</TYPE> -<RANGE>[0,01,10]</RANGE> +<RANGE>[0.01,10]</RANGE> <NICK>Gamma</NICK> <BLURB>gamma.</BLURB> @@ -17328,3 +17328,113 @@ <DEFAULT>2</DEFAULT> +<ARG> +<NAME>GstAudioChebyshevFreqBand::lower-frequency</NAME> +<TYPE>gfloat</TYPE> +<RANGE>>= 0</RANGE> +<FLAGS>rw</FLAGS> +<NICK>Lower frequency</NICK> +<BLURB>Start frequency of the band (Hz).</BLURB> +<DEFAULT>0</DEFAULT> +</ARG> +<NAME>GstAudioChebyshevFreqBand::mode</NAME> +<TYPE>GstAudioChebyshevFreqBandMode</TYPE> +<RANGE></RANGE> +<NICK>Mode</NICK> +<BLURB>Low pass or high pass mode.</BLURB> +<DEFAULT>Band pass (default)</DEFAULT> +<NAME>GstAudioChebyshevFreqBand::poles</NAME> +<TYPE>gint</TYPE> +<RANGE>[4,32]</RANGE> +<NICK>Poles</NICK> +<BLURB>Number of poles to use, will be rounded up to the next multiply of four.</BLURB> +<DEFAULT>4</DEFAULT> +<NAME>GstAudioChebyshevFreqBand::ripple</NAME> +<NICK>Ripple</NICK> +<BLURB>Amount of ripple (dB).</BLURB> +<DEFAULT>0.25</DEFAULT> +<NAME>GstAudioChebyshevFreqBand::type</NAME> +<RANGE>[1,2]</RANGE> +<NICK>Type</NICK> +<BLURB>Type of the chebychev filter.</BLURB> +<DEFAULT>1</DEFAULT> +<NAME>GstAudioChebyshevFreqBand::upper-frequency</NAME> +<NICK>Upper frequency</NICK> +<BLURB>Stop frequency of the band (Hz).</BLURB> +<NAME>GstAudioChebyshevFreqLimit::cutoff</NAME> +<NICK>Cutoff</NICK> +<BLURB>Cut off frequency (Hz).</BLURB> +<NAME>GstAudioChebyshevFreqLimit::mode</NAME> +<TYPE>GstAudioChebyshevFreqLimitMode</TYPE> +<DEFAULT>Low pass (default)</DEFAULT> +<NAME>GstAudioChebyshevFreqLimit::poles</NAME> +<RANGE>[2,32]</RANGE> +<BLURB>Number of poles to use, will be rounded up to the next even number.</BLURB> +<NAME>GstAudioChebyshevFreqLimit::ripple</NAME> +<NAME>GstAudioChebyshevFreqLimit::type</NAME> Index: plugin-1394.xml RCS file: /cvs/gstreamer/gst-plugins-good/docs/plugins/inspect/plugin-1394.xml,v retrieving ... 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