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* Copyright (C) <2004> Benjamin Otte <otte@gnome.org>
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* <2007> Stefan Kost <ensonic@users.sf.net>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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* SECTION:element-equalizer-nbands
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* <title>Example launch line</title>
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* The n-band equalizer element changes the frequency spectrum of the audio data.
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* gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-nbands num-bands=15 band5::gain=-1.0 ! alsasink
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* This make the equalizer use 15 bands and lowers the volume of the 5th band by FIXME db.
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#include "gstiirequalizer.h"
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#include "gstiirequalizernbands.h"
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static void gst_iir_equalizer_nbands_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_iir_equalizer_nbands_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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GST_DEBUG_CATEGORY_EXTERN ()(equalizer_debug);
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#define GST_CAT_DEFAULT equalizer_debug
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GST_BOILERPLATE (GstIirEqualizerNBands, gst_iir_equalizer_nbands,
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GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
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/* equalizer implementation */
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gst_iir_equalizer_nbands_base_init (gpointer g_class)
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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const GstElementDetails iir_equalizer_details =
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GST_ELEMENT_DETAILS ("N Band Equalizer",
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"Filter/Effect/Audio",
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"Direct Form IIR equalizer",
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"Benjamin Otte <otte@gnome.org>," " Stefan Kost <ensonic@users.sf.net>");
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gst_element_class_set_details (element_class, &iir_equalizer_details);
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gst_iir_equalizer_nbands_class_init (GstIirEqualizerNBandsClass * klass)
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->set_property = gst_iir_equalizer_nbands_set_property;
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gobject_class->get_property = gst_iir_equalizer_nbands_get_property;
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g_object_class_install_property (gobject_class, ARG_NUM_BANDS,
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g_param_spec_uint ("num-bands", "num-bands",
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"number of different bands to use", 2, 64, 10,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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gst_iir_equalizer_nbands_init (GstIirEqualizerNBands * equ_n,
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GstIirEqualizerNBandsClass * g_class)
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GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
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gst_iir_equalizer_compute_frequencies (equ, 10);
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gst_iir_equalizer_nbands_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
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GST_EQUALIZER_TRANSFORM_LOCK (equ);
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GST_OBJECT_LOCK (equ);
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gst_iir_equalizer_compute_frequencies (equ, g_value_get_uint (value));
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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GST_OBJECT_UNLOCK (equ);
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GST_EQUALIZER_TRANSFORM_UNLOCK (equ);
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gst_iir_equalizer_nbands_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
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g_value_set_uint (value, equ->freq_band_count);
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
added
removed
gst/equalizer/gstiirequalizernbands.c
