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/*
* audioeq
*
* Copyright (c) 2000 - 2012 Samsung Electronics Co., Ltd. All rights reserved.
*
* Contact: Aditi Narula <aditi.n@samsung.com>
*
* This library is free software; you can redistribute it and/or 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 MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU 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
*
*/
#ifndef __GST_AUDIOEQ_H__
#define __GST_AUDIOEQ_H__
#include <stdio.h>
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <gst/audio/gstaudiofilter.h>
#include <gst/audio/gstringbuffer.h>
#include <gst/controller/gstcontroller.h>
G_BEGIN_DECLS
#define GST_TYPE_AUDIOEQ \
(gst_audioeq_get_type())
#define GST_AUDIOEQ(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIOEQ,Gstaudioeq))
#define GST_audioeq_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIOEQ,GstaudioeqClass))
#define GST_IS_AUDIOEQ(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIOEQ))
#define GST_IS_AUDIOEQ_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIOEQ))
#define GST_TYPE_IIR_EQUALIZER \
(gst_iir_equalizer_get_type())
#define GST_IIR_EQUALIZER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_IIR_EQUALIZER,GstIirEqualizer))
#define GST_IIR_EQUALIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_IIR_EQUALIZER,GstIirEqualizerClass))
#define GST_IS_IIR_EQUALIZER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_IIR_EQUALIZER))
#define GST_IS_IIR_EQUALIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_IIR_EQUALIZER))
typedef struct _Gstaudioeq Gstaudioeq;
typedef struct _GstaudioeqClass GstaudioeqClass;
typedef struct _GstIirEqualizer GstIirEqualizer;
typedef struct _GstIirEqualizerClass GstIirEqualizerClass;
typedef struct _GstIirEqualizerBand GstIirEqualizerBand;
#define CUSTOM_EQ_BAND_MAX 9
#define LOWEST_FREQ (20.0)
#define HIGHEST_FREQ (20000.0)
typedef void (*ProcessFunc) (GstIirEqualizer * eq, guint8 * data, guint size,
guint channels);
struct _GstIirEqualizer
{
GstAudioFilter audiofilter;
/*< private >*/
GMutex *bands_lock;
GstIirEqualizerBand **bands;
/* properties */
guint freq_band_count;
/* for each band and channel */
gpointer history;
guint history_size;
gboolean need_new_coefficients;
ProcessFunc process;
};
struct _GstIirEqualizerClass
{
GstAudioFilterClass audiofilter_class;
};
struct _Gstaudioeq
{
GstBaseTransform element;
guint samplerate;
guint channels;
/* properties */
guint filter_action;
gint custom_eq[CUSTOM_EQ_BAND_MAX];
gboolean need_update_filter;
GstIirEqualizer equ;
};
struct _GstaudioeqClass
{
GstAudioFilterClass parent_class;
};
void gst_iir_equalizer_compute_frequencies (Gstaudioeq * audioeq, guint new_count);
GType gst_iir_equalizer_get_type(void);
GType gst_audioeq_get_type (void);
G_END_DECLS
#endif /* __GST_AUDIOEQ_H__ */
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