libgstequalizer_la_SOURCES = \
gstiirequalizer.c gstiirequalizer.h \
- gstiirequalizernbands.c gstiirequalizernbands.h
-
+ gstiirequalizernbands.c gstiirequalizernbands.h \
+ gstiirequalizer3bands.c gstiirequalizer3bands.h \
+ gstiirequalizer10bands.c gstiirequalizer10bands.h
+
libgstequalizer_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_CFLAGS) $(GST_CONTROLLER_CFLAGS)
libgstequalizer_la_LIBADD = $(GST_LIBS) $(GST_PLUGINS_BASE_LIBS) -lgstaudio-$(GST_MAJORMINOR) $(GST_BASE_LIBS) $(GST_CONTROLLER_LIBS) $(LIBM)
libgstequalizer_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
#include "gstiirequalizer.h"
#include "gstiirequalizernbands.h"
+#include "gstiirequalizer3bands.h"
+#include "gstiirequalizer10bands.h"
GST_DEBUG_CATEGORY (equalizer_debug);
#define GST_CAT_DEFAULT equalizer_debug
GST_IIR_EQUALIZER (gst_object_get_parent (GST_OBJECT (band)));
band->gain = gain;
- setup_filter (equ, band);
+ if (GST_AUDIO_FILTER (equ)->format.rate) {
+ setup_filter (equ, band);
+ }
gst_object_unref (equ);
+ GST_INFO_OBJECT (band, "changed gain = %lf ", band->gain);
}
break;
}
static void
setup_filter (GstIirEqualizer * equ, GstIirEqualizerBand * band)
{
- gdouble gain = arg_to_scale (band->gain);
- gdouble frequency = band->freq / GST_AUDIO_FILTER (equ)->format.rate;
- gdouble q = pow (HIGHEST_FREQ / LOWEST_FREQ,
- 1.0 / (equ->freq_band_count - 1)) * equ->band_width;
- gdouble theta = frequency * 2 * M_PI;
-
- band->beta = (q - theta / 2) / (2 * q + theta);
- band->gamma = (0.5 + band->beta) * cos (theta);
- band->alpha = (0.5 - band->beta) / 2;
-
- band->beta *= 2.0;
- band->alpha *= 2.0 * gain;
- band->gamma *= 2.0;
- GST_INFO ("gain = %g, frequency = %g, alpha = %g, beta = %g, gamma=%g",
- gain, frequency, band->alpha, band->beta, band->gamma);
+ g_return_if_fail (GST_AUDIO_FILTER (equ)->format.rate);
+
+ {
+ gdouble gain = arg_to_scale (band->gain);
+ gdouble frequency = band->freq / GST_AUDIO_FILTER (equ)->format.rate;
+ gdouble q = pow (HIGHEST_FREQ / LOWEST_FREQ,
+ 1.0 / (equ->freq_band_count - 1)) * equ->band_width;
+ gdouble theta = frequency * 2 * M_PI;
+
+ band->beta = (q - theta / 2) / (2 * q + theta);
+ band->gamma = (0.5 + band->beta) * cos (theta);
+ band->alpha = (0.5 - band->beta) / 2;
+
+ band->beta *= 2.0;
+ band->alpha *= 2.0 * gain;
+ band->gamma *= 2.0;
+ GST_INFO ("gain = %g, frequency = %g, alpha = %g, beta = %g, gamma=%g",
+ gain, frequency, band->alpha, band->beta, band->gamma);
+ }
}
void
} else {
/* free unused bands */
for (i = new_count; i < old_count; i++) {
+ GST_DEBUG ("removing band[%d]=%p", i, equ->bands[i]);
gst_child_proxy_child_removed (GST_OBJECT (equ),
GST_OBJECT (equ->bands[i]));
- gst_object_unref (equ->bands[i]);
+ gst_object_unparent (GST_OBJECT (equ->bands[i]));
equ->bands[i] = NULL;
}
}
* application should read band->freq
*/
equ->bands[0]->freq = LOWEST_FREQ;
+ GST_DEBUG ("band[ 0] = '%lf'", equ->bands[0]->freq);
/*
if(equ->bands[0]->freq<10000.0) {
sprintf (name,"%dHz",(gint)equ->bands[0]->freq);
for (i = 1; i < new_count; i++) {
equ->bands[i]->freq = equ->bands[i - 1]->freq * step;
+ GST_DEBUG ("band[%2d] = '%lf'", i, equ->bands[i]->freq);
/*
if(equ->bands[i]->freq<10000.0) {
sprintf (name,"%dHz",(gint)equ->bands[i]->freq);
{
GstAudioFilter *filter = GST_AUDIO_FILTER (btrans);
GstIirEqualizer *equ = GST_IIR_EQUALIZER (btrans);
+ GstClockTime timestamp;
if (G_UNLIKELY (filter->format.channels < 1 || equ->process == NULL))
return GST_FLOW_NOT_NEGOTIATED;
+ timestamp = GST_BUFFER_TIMESTAMP (buf);
+ timestamp =
+ gst_segment_to_stream_time (&btrans->segment, GST_FORMAT_TIME, timestamp);
+
+ if (GST_CLOCK_TIME_IS_VALID (timestamp))
+ gst_object_sync_values (G_OBJECT (equ), timestamp);
+
equ->process (equ, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf),
filter->format.channels);
{
GST_DEBUG_CATEGORY_INIT (equalizer_debug, "equalizer", 0, "equalizer");
- return gst_element_register (plugin, "equalizer-nbands", GST_RANK_NONE,
- GST_TYPE_IIR_EQUALIZER_NBANDS);
+ if (!(gst_element_register (plugin, "equalizer-nbands", GST_RANK_NONE,
+ GST_TYPE_IIR_EQUALIZER_NBANDS)))
+ return FALSE;
+
+ if (!(gst_element_register (plugin, "equalizer-3bands", GST_RANK_NONE,
+ GST_TYPE_IIR_EQUALIZER_3BANDS)))
+ return FALSE;
+
+ if (!(gst_element_register (plugin, "equalizer-10bands", GST_RANK_NONE,
+ GST_TYPE_IIR_EQUALIZER_10BANDS)))
+ return FALSE;
+
+ return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
--- /dev/null
+/* GStreamer
+ * Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * 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.
+ */
+
+/*
+ *
+ * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-10bands band1=-1.0 ! alsasink
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstiirequalizer.h"
+#include "gstiirequalizer10bands.h"
+
+
+enum
+{
+ ARG_BAND0 = 1,
+ ARG_BAND1,
+ ARG_BAND2,
+ ARG_BAND3,
+ ARG_BAND4,
+ ARG_BAND5,
+ ARG_BAND6,
+ ARG_BAND7,
+ ARG_BAND8,
+ ARG_BAND9,
+};
+
+static void gst_iir_equalizer_10bands_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_iir_equalizer_10bands_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+GST_DEBUG_CATEGORY_EXTERN ()(equalizer_debug);
+#define GST_CAT_DEFAULT equalizer_debug
+
+GST_BOILERPLATE (GstIirEqualizer10Bands, gst_iir_equalizer_10bands,
+ GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
+
+/* equalizer implementation */
+
+static void
+gst_iir_equalizer_10bands_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+ const GstElementDetails iir_equalizer_details =
+ GST_ELEMENT_DETAILS ("10 Band Equalizer",
+ "Filter/Effect/Audio",
+ "Direct Form 10 band IIR equalizer",
+ "Stefan Kost <ensonic@users.sf.net>");
+
+ gst_element_class_set_details (element_class, &iir_equalizer_details);
+}
+
+static void
+gst_iir_equalizer_10bands_class_init (GstIirEqualizer10BandsClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ gobject_class->set_property = gst_iir_equalizer_10bands_set_property;
+ gobject_class->get_property = gst_iir_equalizer_10bands_get_property;
+
+ g_object_class_install_property (gobject_class, ARG_BAND0,
+ g_param_spec_double ("band0", "20 Hz",
+ "gain for the frequency band 20 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND1,
+ g_param_spec_double ("band1", "43 Hz",
+ "gain for the frequency band 43 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND2,
+ g_param_spec_double ("band2", "93 Hz",
+ "gain for the frequency band 93 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND3,
+ g_param_spec_double ("band3", "200 Hz",
+ "gain for the frequency band 200 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND4,
+ g_param_spec_double ("band4", "430 Hz",
+ "gain for the frequency band 430 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND5,
+ g_param_spec_double ("band5", "928 Hz",
+ "gain for the frequency band 928 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND6,
+ g_param_spec_double ("band6", "2000 Hz",
+ "gain for the frequency band 2000 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND7,
+ g_param_spec_double ("band7", "4308 Hz",
+ "gain for the frequency band 4308 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND8,
+ g_param_spec_double ("band8", "9283 Hz",
+ "gain for the frequency band 9283 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND9,
+ g_param_spec_double ("band9", "20 kHz",
+ "gain for the frequency band 20 kHz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+}
+
+static void
+gst_iir_equalizer_10bands_init (GstIirEqualizer10Bands * equ_n,
+ GstIirEqualizer10BandsClass * g_class)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
+
+ gst_iir_equalizer_compute_frequencies (equ, 3);
+}
+
+static void
+gst_iir_equalizer_10bands_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+ switch (prop_id) {
+ case ARG_BAND0:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band0::gain", value);
+ break;
+ case ARG_BAND1:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band1::gain", value);
+ break;
+ case ARG_BAND2:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band2::gain", value);
+ break;
+ case ARG_BAND3:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band3::gain", value);
+ break;
+ case ARG_BAND4:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band4::gain", value);
+ break;
+ case ARG_BAND5:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band5::gain", value);
+ break;
+ case ARG_BAND6:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band6::gain", value);
+ break;
+ case ARG_BAND7:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band7::gain", value);
+ break;
+ case ARG_BAND8:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band8::gain", value);
+ break;
+ case ARG_BAND9:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band9::gain", value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_iir_equalizer_10bands_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+ switch (prop_id) {
+ case ARG_BAND0:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band0::gain", value);
+ break;
+ case ARG_BAND1:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band1::gain", value);
+ break;
+ case ARG_BAND2:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band2::gain", value);
+ break;
+ case ARG_BAND3:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band3::gain", value);
+ break;
+ case ARG_BAND4:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band4::gain", value);
+ break;
+ case ARG_BAND5:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band5::gain", value);
+ break;
+ case ARG_BAND6:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band6::gain", value);
+ break;
+ case ARG_BAND7:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band7::gain", value);
+ break;
+ case ARG_BAND8:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band8::gain", value);
+ break;
+ case ARG_BAND9:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band9::gain", value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * 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.
+ */
+
+#ifndef __GST_IIR_EQUALIZER_10BANDS__
+#define __GST_IIR_EQUALIZER_10BANDS__
+
+#include "gstiirequalizer.h"
+
+typedef struct _GstIirEqualizer10Bands GstIirEqualizer10Bands;
+typedef struct _GstIirEqualizer10BandsClass GstIirEqualizer10BandsClass;
+
+#define GST_TYPE_IIR_EQUALIZER_10BANDS \
+ (gst_iir_equalizer_10bands_get_type())
+#define GST_IIR_EQUALIZER_10BANDS(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IIR_EQUALIZER_10BANDS,GstIirEqualizer10Bands))
+#define GST_IIR_EQUALIZER_10BANDS_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IIR_EQUALIZER_10BANDS,GstIirEqualizer10BandsClass))
+#define GST_IS_IIR_EQUALIZER_10BANDS(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IIR_EQUALIZER_10BANDS))
+#define GST_IS_IIR_EQUALIZER_10BANDS_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IIR_EQUALIZER_10BANDS))
+
+struct _GstIirEqualizer10Bands
+{
+ GstIirEqualizer equalizer;
+};
+
+struct _GstIirEqualizer10BandsClass
+{
+ GstIirEqualizer equalizer_class;
+};
+
+extern GType gst_iir_equalizer_10bands_get_type(void);
+
+#endif /* __GST_IIR_EQUALIZER_10BANDS__ */
--- /dev/null
+/* GStreamer
+ * Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:element-equalizer-3bands
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * The 3 band equalizer element changes the frequency spectrum of the audio data.
+ * </para>
+ * <para>
+ * <programlisting>
+ * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-3bands band1=-1.0 ! alsasink
+ * </programlisting>
+ * This lowers the volume of the 2nd band which is at 632 Hz by FIXME db.
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstiirequalizer.h"
+#include "gstiirequalizer3bands.h"
+
+
+enum
+{
+ ARG_BAND0 = 1,
+ ARG_BAND1,
+ ARG_BAND2,
+};
+
+static void gst_iir_equalizer_3bands_set_property (GObject * object,
+ guint prop_id, const GValue * value, GParamSpec * pspec);
+static void gst_iir_equalizer_3bands_get_property (GObject * object,
+ guint prop_id, GValue * value, GParamSpec * pspec);
+
+GST_DEBUG_CATEGORY_EXTERN ()(equalizer_debug);
+#define GST_CAT_DEFAULT equalizer_debug
+
+GST_BOILERPLATE (GstIirEqualizer3Bands, gst_iir_equalizer_3bands,
+ GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
+
+/* equalizer implementation */
+
+static void
+gst_iir_equalizer_3bands_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+ const GstElementDetails iir_equalizer_details =
+ GST_ELEMENT_DETAILS ("3 Band Equalizer",
+ "Filter/Effect/Audio",
+ "Direct Form 3 band IIR equalizer",
+ "Stefan Kost <ensonic@users.sf.net>");
+
+ gst_element_class_set_details (element_class, &iir_equalizer_details);
+}
+
+static void
+gst_iir_equalizer_3bands_class_init (GstIirEqualizer3BandsClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ gobject_class->set_property = gst_iir_equalizer_3bands_set_property;
+ gobject_class->get_property = gst_iir_equalizer_3bands_get_property;
+
+ g_object_class_install_property (gobject_class, ARG_BAND0,
+ g_param_spec_double ("band0", "20 Hz",
+ "gain for the frequency band 20 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND1,
+ g_param_spec_double ("band1", "632 Hz",
+ "gain for the frequency band 632 Hz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+ g_object_class_install_property (gobject_class, ARG_BAND2,
+ g_param_spec_double ("band2", "20 kHz",
+ "gain for the frequency band 20 kHz, ranging from -1.0 to +1.0",
+ -1.0, 1.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
+}
+
+static void
+gst_iir_equalizer_3bands_init (GstIirEqualizer3Bands * equ_n,
+ GstIirEqualizer3BandsClass * g_class)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
+
+ gst_iir_equalizer_compute_frequencies (equ, 3);
+}
+
+static void
+gst_iir_equalizer_3bands_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+ switch (prop_id) {
+ case ARG_BAND0:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band0::gain", value);
+ break;
+ case ARG_BAND1:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band1::gain", value);
+ break;
+ case ARG_BAND2:
+ gst_child_proxy_set_property (GST_OBJECT (equ), "band2::gain", value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_iir_equalizer_3bands_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
+
+ switch (prop_id) {
+ case ARG_BAND0:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band0::gain", value);
+ break;
+ case ARG_BAND1:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band1::gain", value);
+ break;
+ case ARG_BAND2:
+ gst_child_proxy_get_property (GST_OBJECT (equ), "band2::gain", value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
+ *
+ * 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.
+ */
+
+#ifndef __GST_IIR_EQUALIZER_3BANDS__
+#define __GST_IIR_EQUALIZER_3BANDS__
+
+#include "gstiirequalizer.h"
+
+typedef struct _GstIirEqualizer3Bands GstIirEqualizer3Bands;
+typedef struct _GstIirEqualizer3BandsClass GstIirEqualizer3BandsClass;
+
+#define GST_TYPE_IIR_EQUALIZER_3BANDS \
+ (gst_iir_equalizer_3bands_get_type())
+#define GST_IIR_EQUALIZER_3BANDS(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IIR_EQUALIZER_3BANDS,GstIirEqualizer3Bands))
+#define GST_IIR_EQUALIZER_3BANDS_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IIR_EQUALIZER_3BANDS,GstIirEqualizer3BandsClass))
+#define GST_IS_IIR_EQUALIZER_3BANDS(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IIR_EQUALIZER_3BANDS))
+#define GST_IS_IIR_EQUALIZER_3BANDS_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IIR_EQUALIZER_3BANDS))
+
+struct _GstIirEqualizer3Bands
+{
+ GstIirEqualizer equalizer;
+};
+
+struct _GstIirEqualizer3BandsClass
+{
+ GstIirEqualizer equalizer_class;
+};
+
+extern GType gst_iir_equalizer_3bands_get_type(void);
+
+#endif /* __GST_IIR_EQUALIZER_3BANDS__ */
* Boston, MA 02111-1307, USA.
*/
-/*
+/**
+ * SECTION:element-equalizer-nbands
*
- * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-nbands rband5::gain=-1.0 ! alsasink
+ * <refsect2>
+ * <title>Example launch line</title>
+ * <para>
+ * The n-band equalizer element changes the frequency spectrum of the audio data.
+ * </para>
+ * <para>
+ * <programlisting>
+ * gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-nbands num-bands=15 band5::gain=-1.0 ! alsasink
+ * </programlisting>
+ * This make the equalizer use 15 bands and lowers the volume of the 5th band by FIXME db.
+ * </para>
+ * </refsect2>
*/
#ifdef HAVE_CONFIG_H
GST_ELEMENT_DETAILS ("N Band Equalizer",
"Filter/Effect/Audio",
"Direct Form IIR equalizer",
- "Benjamin Otte <otte@gnome.org>," " Stefan Kost <ensonic@user.sf.net>");
+ "Benjamin Otte <otte@gnome.org>," " Stefan Kost <ensonic@users.sf.net>");
gst_element_class_set_details (element_class, &iir_equalizer_details);
}
samples = (const gint16 *) gst_adapter_peek (spectrum->adapter, wanted);
+ /* the current fft code is gint16 based, so supporting other formats would
+ * not really benefit now */
for (i = 0, j = 0; i < spectrum->len; i++) {
+ /* convert to mono */
for (k = 0, acc = 0; k < spectrum->channels; k++)
acc += samples[j++];
spectrum->re[i] = (gint16) (acc / spectrum->channels);
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