author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 15:15:52 +0300 | |
changeset 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
8
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/* |
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* GStreamer |
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* Copyright (C) 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk> |
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* |
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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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* |
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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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* |
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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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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include <gst/gst.h> |
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#include <gst/base/gstbasetransform.h> |
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#include <gst/audio/audio.h> |
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#include <gst/audio/gstaudiofilter.h> |
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#include <gst/controller/gstcontroller.h> |
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#include <math.h> |
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#include "audiofxbaseiirfilter.h" |
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#define GST_CAT_DEFAULT gst_audio_fx_base_iir_filter_debug |
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT); |
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#define ALLOWED_CAPS \ |
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"audio/x-raw-float," \ |
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" width = (int) { 32, 64 }, " \ |
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" endianness = (int) BYTE_ORDER," \ |
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" rate = (int) [ 1, MAX ]," \ |
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" channels = (int) [ 1, MAX ]" |
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#define DEBUG_INIT(bla) \ |
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GST_DEBUG_CATEGORY_INIT (gst_audio_fx_base_iir_filter_debug, "audiofxbaseiirfilter", 0, "Audio IIR Filter Base Class"); |
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GST_BOILERPLATE_FULL (GstAudioFXBaseIIRFilter, |
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gst_audio_fx_base_iir_filter, GstAudioFilter, GST_TYPE_AUDIO_FILTER, |
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DEBUG_INIT); |
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static gboolean gst_audio_fx_base_iir_filter_setup (GstAudioFilter * filter, |
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GstRingBufferSpec * format); |
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static GstFlowReturn |
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gst_audio_fx_base_iir_filter_transform_ip (GstBaseTransform * base, |
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GstBuffer * buf); |
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static gboolean gst_audio_fx_base_iir_filter_stop (GstBaseTransform * base); |
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static void process_64 (GstAudioFXBaseIIRFilter * filter, |
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gdouble * data, guint num_samples); |
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static void process_32 (GstAudioFXBaseIIRFilter * filter, |
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gfloat * data, guint num_samples); |
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/* GObject vmethod implementations */ |
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static void |
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gst_audio_fx_base_iir_filter_base_init (gpointer klass) |
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{ |
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GstCaps *caps; |
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caps = gst_caps_from_string (ALLOWED_CAPS); |
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gst_audio_filter_class_add_pad_templates (GST_AUDIO_FILTER_CLASS (klass), |
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caps); |
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gst_caps_unref (caps); |
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} |
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static void |
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gst_audio_fx_base_iir_filter_dispose (GObject * object) |
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{ |
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GstAudioFXBaseIIRFilter *filter = GST_AUDIO_FX_BASE_IIR_FILTER (object); |
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if (filter->a) { |
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g_free (filter->a); |
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filter->a = NULL; |
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} |
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if (filter->b) { |
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g_free (filter->b); |
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filter->b = NULL; |
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} |
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if (filter->channels) { |
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GstAudioFXBaseIIRFilterChannelCtx *ctx; |
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guint i; |
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for (i = 0; i < filter->nchannels; i++) { |
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ctx = &filter->channels[i]; |
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g_free (ctx->x); |
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g_free (ctx->y); |
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} |
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|
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|
102 |
g_free (filter->channels); |
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|
103 |
filter->channels = NULL; |
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|
104 |
} |
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|
105 |
|
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|
106 |
G_OBJECT_CLASS (parent_class)->dispose (object); |
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|
107 |
} |
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|
108 |
|
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|
109 |
static void |
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|
110 |
gst_audio_fx_base_iir_filter_class_init (GstAudioFXBaseIIRFilterClass * klass) |
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|
111 |
{ |
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|
112 |
GObjectClass *gobject_class = (GObjectClass *) klass; |
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|
113 |
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass; |
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|
114 |
GstAudioFilterClass *filter_class = (GstAudioFilterClass *) klass; |
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|
115 |
|
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|
116 |
gobject_class->dispose = gst_audio_fx_base_iir_filter_dispose; |
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|
117 |
|
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|
118 |
filter_class->setup = GST_DEBUG_FUNCPTR (gst_audio_fx_base_iir_filter_setup); |
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|
119 |
|
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120 |
trans_class->transform_ip = |
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|
121 |
GST_DEBUG_FUNCPTR (gst_audio_fx_base_iir_filter_transform_ip); |
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|
122 |
trans_class->stop = GST_DEBUG_FUNCPTR (gst_audio_fx_base_iir_filter_stop); |
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|
123 |
} |
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|
124 |
|
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|
125 |
static void |
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126 |
gst_audio_fx_base_iir_filter_init (GstAudioFXBaseIIRFilter * filter, |
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|
127 |
GstAudioFXBaseIIRFilterClass * klass) |
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|
128 |
{ |
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|
129 |
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (filter), TRUE); |
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|
130 |
|
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|
131 |
filter->a = NULL; |
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|
132 |
filter->na = 0; |
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|
133 |
filter->b = NULL; |
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|
134 |
filter->nb = 0; |
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|
135 |
filter->channels = NULL; |
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|
136 |
filter->nchannels = 0; |
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|
137 |
} |
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|
138 |
|
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|
139 |
/* Evaluate the transfer function that corresponds to the IIR |
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|
140 |
* coefficients at zr + zi*I and return the magnitude */ |
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|
141 |
gdouble |
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|
142 |
gst_audio_fx_base_iir_filter_calculate_gain (gdouble * a, guint na, gdouble * b, |
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|
143 |
guint nb, gdouble zr, gdouble zi) |
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|
144 |
{ |
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|
145 |
gdouble sum_ar, sum_ai; |
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|
146 |
gdouble sum_br, sum_bi; |
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|
147 |
gdouble gain_r, gain_i; |
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|
148 |
|
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|
149 |
gdouble sum_r_old; |
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|
150 |
gdouble sum_i_old; |
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|
151 |
|
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|
152 |
gint i; |
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|
153 |
|
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|
154 |
sum_ar = 0.0; |
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|
155 |
sum_ai = 0.0; |
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|
156 |
for (i = na - 1; i >= 0; i--) { |
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|
157 |
sum_r_old = sum_ar; |
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Revision: 201011
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|
158 |
sum_i_old = sum_ai; |
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Revision: 201011
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|
159 |
|
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|
160 |
sum_ar = (sum_r_old * zr - sum_i_old * zi) + a[i]; |
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|
161 |
sum_ai = (sum_r_old * zi + sum_i_old * zr) + 0.0; |
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|
162 |
} |
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Revision: 201011
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|
163 |
|
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Revision: 201011
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|
164 |
sum_br = 0.0; |
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|
165 |
sum_bi = 0.0; |
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Revision: 201011
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parents:
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|
166 |
for (i = nb - 1; i >= 0; i--) { |
4a7fac7dd34a
Revision: 201011
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|
167 |
sum_r_old = sum_br; |
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Revision: 201011
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parents:
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|
168 |
sum_i_old = sum_bi; |
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Revision: 201011
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|
169 |
|
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Revision: 201011
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|
170 |
sum_br = (sum_r_old * zr - sum_i_old * zi) - b[i]; |
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|
171 |
sum_bi = (sum_r_old * zi + sum_i_old * zr) - 0.0; |
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|
172 |
} |
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Revision: 201011
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|
173 |
sum_br += 1.0; |
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Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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|
174 |
sum_bi += 0.0; |
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Revision: 201011
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parents:
diff
changeset
|
175 |
|
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Revision: 201011
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diff
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|
176 |
gain_r = |
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Revision: 201011
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|
177 |
(sum_ar * sum_br + sum_ai * sum_bi) / (sum_br * sum_br + sum_bi * sum_bi); |
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|
178 |
gain_i = |
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|
179 |
(sum_ai * sum_br - sum_ar * sum_bi) / (sum_br * sum_br + sum_bi * sum_bi); |
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|
180 |
|
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|
181 |
return (sqrt (gain_r * gain_r + gain_i * gain_i)); |
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|
182 |
} |
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Revision: 201011
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diff
changeset
|
183 |
|
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Revision: 201011
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|
184 |
void |
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|
185 |
gst_audio_fx_base_iir_filter_set_coefficients (GstAudioFXBaseIIRFilter * filter, |
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|
186 |
gdouble * a, guint na, gdouble * b, guint nb) |
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|
187 |
{ |
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|
188 |
guint i; |
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diff
changeset
|
189 |
|
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Revision: 201011
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|
190 |
g_return_if_fail (GST_IS_AUDIO_FX_BASE_IIR_FILTER (filter)); |
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diff
changeset
|
191 |
|
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Revision: 201011
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|
192 |
GST_BASE_TRANSFORM_LOCK (filter); |
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diff
changeset
|
193 |
|
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Revision: 201011
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diff
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|
194 |
g_free (filter->a); |
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|
195 |
g_free (filter->b); |
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diff
changeset
|
196 |
|
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|
197 |
filter->a = filter->b = NULL; |
4a7fac7dd34a
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diff
changeset
|
198 |
|
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Revision: 201011
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|
199 |
if (filter->channels) { |
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Revision: 201011
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|
200 |
GstAudioFXBaseIIRFilterChannelCtx *ctx; |
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Revision: 201011
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diff
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|
201 |
gboolean free = (na != filter->na || nb != filter->nb); |
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Revision: 201011
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diff
changeset
|
202 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
for (i = 0; i < filter->nchannels; i++) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
204 |
ctx = &filter->channels[i]; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
206 |
if (free) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
207 |
g_free (ctx->x); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
208 |
else |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
209 |
memset (ctx->x, 0, filter->na * sizeof (gdouble)); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
210 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
211 |
if (free) |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
212 |
g_free (ctx->y); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
213 |
else |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
214 |
memset (ctx->y, 0, filter->nb * sizeof (gdouble)); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
215 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
216 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
217 |
g_free (filter->channels); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
218 |
filter->channels = NULL; |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
219 |
} |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
220 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
221 |
filter->na = na; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
222 |
filter->nb = nb; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
223 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
224 |
filter->a = a; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
225 |
filter->b = b; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
226 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
227 |
if (filter->nchannels && !filter->channels) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
228 |
GstAudioFXBaseIIRFilterChannelCtx *ctx; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
229 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
230 |
filter->channels = |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
231 |
g_new0 (GstAudioFXBaseIIRFilterChannelCtx, filter->nchannels); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
232 |
for (i = 0; i < filter->nchannels; i++) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
233 |
ctx = &filter->channels[i]; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
234 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
235 |
ctx->x = g_new0 (gdouble, filter->na); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
236 |
ctx->y = g_new0 (gdouble, filter->nb); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
237 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
238 |
} |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
239 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
240 |
GST_BASE_TRANSFORM_UNLOCK (filter); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
241 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
242 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
243 |
/* GstAudioFilter vmethod implementations */ |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
244 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
245 |
static gboolean |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
246 |
gst_audio_fx_base_iir_filter_setup (GstAudioFilter * base, |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
247 |
GstRingBufferSpec * format) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
248 |
{ |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
249 |
GstAudioFXBaseIIRFilter *filter = GST_AUDIO_FX_BASE_IIR_FILTER (base); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
250 |
gboolean ret = TRUE; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
251 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
252 |
if (format->width == 32) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
253 |
filter->process = (GstAudioFXBaseIIRFilterProcessFunc) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
254 |
process_32; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
255 |
else if (format->width == 64) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
256 |
filter->process = (GstAudioFXBaseIIRFilterProcessFunc) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
257 |
process_64; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
258 |
else |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
259 |
ret = FALSE; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
260 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
261 |
if (format->channels != filter->nchannels) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
262 |
guint i; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
263 |
GstAudioFXBaseIIRFilterChannelCtx *ctx; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
264 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
265 |
if (filter->channels) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
266 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
267 |
for (i = 0; i < filter->nchannels; i++) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
268 |
ctx = &filter->channels[i]; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
269 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
270 |
g_free (ctx->x); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
271 |
g_free (ctx->y); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
272 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
273 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
274 |
g_free (filter->channels); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
275 |
filter->channels = NULL; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
276 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
277 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
278 |
filter->nchannels = format->channels; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
279 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
280 |
filter->channels = |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
281 |
g_new0 (GstAudioFXBaseIIRFilterChannelCtx, filter->nchannels); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
282 |
for (i = 0; i < filter->nchannels; i++) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
283 |
ctx = &filter->channels[i]; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
284 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
285 |
ctx->x = g_new0 (gdouble, filter->na); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
286 |
ctx->y = g_new0 (gdouble, filter->nb); |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
287 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
288 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
289 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
290 |
return ret; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
291 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
292 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
293 |
static inline gdouble |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
294 |
process (GstAudioFXBaseIIRFilter * filter, |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
295 |
GstAudioFXBaseIIRFilterChannelCtx * ctx, gdouble x0) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
296 |
{ |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
297 |
gdouble val = filter->a[0] * x0; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
298 |
gint i, j; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
299 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
300 |
for (i = 1, j = ctx->x_pos; i < filter->na; i++) { |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
301 |
val += filter->a[i] * ctx->x[j]; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
302 |
j--; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
303 |
if (j < 0) |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
304 |
j = filter->na - 1; |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
305 |
} |
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
306 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
307 |
for (i = 1, j = ctx->y_pos; i < filter->nb; i++) { |
4a7fac7dd34a
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|
308 |
val += filter->b[i] * ctx->y[j]; |
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|
309 |
j--; |
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|
310 |
if (j < 0) |
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|
311 |
j = filter->nb - 1; |
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|
312 |
} |
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|
313 |
|
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|
314 |
if (ctx->x) { |
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|
315 |
ctx->x_pos++; |
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|
316 |
if (ctx->x_pos >= filter->na) |
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|
317 |
ctx->x_pos = 0; |
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|
318 |
ctx->x[ctx->x_pos] = x0; |
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|
319 |
} |
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|
320 |
if (ctx->y) { |
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|
321 |
ctx->y_pos++; |
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|
322 |
if (ctx->y_pos >= filter->nb) |
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|
323 |
ctx->y_pos = 0; |
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|
324 |
|
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|
325 |
ctx->y[ctx->y_pos] = val; |
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|
326 |
} |
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|
327 |
|
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|
328 |
return val; |
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|
329 |
} |
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|
330 |
|
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|
331 |
#define DEFINE_PROCESS_FUNC(width,ctype) \ |
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|
332 |
static void \ |
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Revision: 201011
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|
333 |
process_##width (GstAudioFXBaseIIRFilter * filter, \ |
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|
334 |
g##ctype * data, guint num_samples) \ |
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|
335 |
{ \ |
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|
336 |
gint i, j, channels = GST_AUDIO_FILTER (filter)->format.channels; \ |
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|
337 |
gdouble val; \ |
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|
338 |
\ |
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|
339 |
for (i = 0; i < num_samples / channels; i++) { \ |
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Revision: 201011
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|
340 |
for (j = 0; j < channels; j++) { \ |
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|
341 |
val = process (filter, &filter->channels[j], *data); \ |
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|
342 |
*data++ = val; \ |
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|
343 |
} \ |
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|
344 |
} \ |
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|
345 |
} |
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|
346 |
|
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|
347 |
DEFINE_PROCESS_FUNC (32, float); |
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|
348 |
DEFINE_PROCESS_FUNC (64, double); |
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|
349 |
|
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parents:
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|
350 |
#undef DEFINE_PROCESS_FUNC |
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|
351 |
|
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Revision: 201011
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|
352 |
/* GstBaseTransform vmethod implementations */ |
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|
353 |
static GstFlowReturn |
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Revision: 201011
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|
354 |
gst_audio_fx_base_iir_filter_transform_ip (GstBaseTransform * base, |
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|
355 |
GstBuffer * buf) |
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|
356 |
{ |
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|
357 |
GstAudioFXBaseIIRFilter *filter = GST_AUDIO_FX_BASE_IIR_FILTER (base); |
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|
358 |
guint num_samples = |
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|
359 |
GST_BUFFER_SIZE (buf) / (GST_AUDIO_FILTER (filter)->format.width / 8); |
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|
360 |
|
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|
361 |
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (buf))) |
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parents:
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|
362 |
gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (buf)); |
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parents:
diff
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|
363 |
|
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Revision: 201011
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parents:
diff
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|
364 |
if (gst_base_transform_is_passthrough (base)) |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
365 |
return GST_FLOW_OK; |
4a7fac7dd34a
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parents:
diff
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|
366 |
|
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Revision: 201011
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parents:
diff
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|
367 |
g_return_val_if_fail (filter->a != NULL, GST_FLOW_ERROR); |
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parents:
diff
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|
368 |
|
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Revision: 201011
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parents:
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|
369 |
filter->process (filter, GST_BUFFER_DATA (buf), num_samples); |
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parents:
diff
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|
370 |
|
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Revision: 201011
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parents:
diff
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|
371 |
return GST_FLOW_OK; |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
372 |
} |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
373 |
|
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
374 |
|
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Revision: 201011
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parents:
diff
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|
375 |
static gboolean |
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Revision: 201011
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|
376 |
gst_audio_fx_base_iir_filter_stop (GstBaseTransform * base) |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
377 |
{ |
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Revision: 201011
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|
378 |
GstAudioFXBaseIIRFilter *filter = GST_AUDIO_FX_BASE_IIR_FILTER (base); |
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parents:
diff
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|
379 |
guint channels = GST_AUDIO_FILTER (filter)->format.channels; |
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Revision: 201011
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parents:
diff
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|
380 |
GstAudioFXBaseIIRFilterChannelCtx *ctx; |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
381 |
guint i; |
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Revision: 201011
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parents:
diff
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|
382 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
383 |
/* Reset the history of input and output values if |
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Revision: 201011
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parents:
diff
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|
384 |
* already existing */ |
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Revision: 201011
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parents:
diff
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|
385 |
if (channels && filter->channels) { |
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Revision: 201011
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parents:
diff
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|
386 |
for (i = 0; i < channels; i++) { |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
387 |
ctx = &filter->channels[i]; |
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Revision: 201011
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parents:
diff
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|
388 |
g_free (ctx->x); |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
389 |
g_free (ctx->y); |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
390 |
} |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
391 |
g_free (filter->channels); |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
392 |
} |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
393 |
filter->channels = NULL; |
4a7fac7dd34a
Revision: 201011
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parents:
diff
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|
394 |
|
4a7fac7dd34a
Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
395 |
return TRUE; |
4a7fac7dd34a
Revision: 201011
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parents:
diff
changeset
|
396 |
} |