author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:53:32 +0200 | |
changeset 0 | 0e761a78d257 |
permissions | -rw-r--r-- |
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/* Resampling library |
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* Copyright (C) <2001> David A. Schleef <ds@schleef.org> |
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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 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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#ifndef __SYMBIAN32__ |
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#include <config.h> |
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#else |
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#include "config.h" |
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#endif |
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#endif |
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#include <string.h> |
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#include <math.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <limits.h> |
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#ifndef __SYMBIAN32__ |
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#include <liboil/liboil.h> |
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#endif |
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#include "resample.h" |
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#include "buffer.h" |
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#include "debug.h" |
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static void |
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func_sinc (double *fx, double *dfx, double x, void *closure) |
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{ |
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//double scale = *(double *)closure; |
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double scale = M_PI; |
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if (x == 0) { |
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*fx = 1; |
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*dfx = 0; |
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return; |
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} |
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x *= scale; |
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*fx = sin (x) / x; |
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*dfx = scale * (cos (x) - sin (x) / x) / x; |
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} |
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static void |
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func_hanning (double *fx, double *dfx, double x, void *closure) |
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{ |
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double width = *(double *) closure; |
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if (x < width && x > -width) { |
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x /= width; |
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*fx = (1 - x * x) * (1 - x * x); |
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*dfx = -2 * 2 * x / width * (1 - x * x); |
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} else { |
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*fx = 0; |
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*dfx = 0; |
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} |
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} |
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#if 0 |
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static double |
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resample_sinc_window (double x, double halfwidth, double scale) |
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{ |
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double y; |
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if (x == 0) |
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return 1.0; |
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if (x < -halfwidth || x > halfwidth) |
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return 0.0; |
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y = sin (x * M_PI * scale) / (x * M_PI * scale) * scale; |
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x /= halfwidth; |
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y *= (1 - x * x) * (1 - x * x); |
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return y; |
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} |
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#endif |
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#if 0 |
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static void |
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functable_test (Functable * ft, double halfwidth) |
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{ |
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int i; |
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double x; |
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for (i = 0; i < 100; i++) { |
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x = i * 0.1; |
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printf ("%d %g %g\n", i, resample_sinc_window (x, halfwidth, 1.0), |
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functable_evaluate (ft, x)); |
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} |
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106 |
exit (0); |
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|
107 |
|
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108 |
} |
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109 |
#endif |
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110 |
|
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111 |
#ifdef __SYMBIAN32__ |
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112 |
EXPORT_C |
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113 |
#endif |
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114 |
void |
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115 |
resample_scale_functable (ResampleState * r) |
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116 |
{ |
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117 |
if (r->need_reinit) { |
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118 |
double hanning_width; |
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119 |
|
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120 |
RESAMPLE_DEBUG ("sample size %d", r->sample_size); |
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121 |
|
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122 |
if (r->buffer) |
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123 |
free (r->buffer); |
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124 |
r->buffer_len = r->sample_size * r->filter_length; |
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125 |
r->buffer = malloc (r->buffer_len); |
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126 |
memset (r->buffer, 0, r->buffer_len); |
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127 |
|
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128 |
r->i_inc = r->o_rate / r->i_rate; |
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129 |
r->o_inc = r->i_rate / r->o_rate; |
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130 |
RESAMPLE_DEBUG ("i_inc %g o_inc %g", r->i_inc, r->o_inc); |
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131 |
|
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132 |
r->i_start = -r->i_inc * r->filter_length; |
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|
133 |
|
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134 |
if (r->ft) { |
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135 |
functable_free (r->ft); |
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|
136 |
} |
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137 |
r->ft = functable_new (); |
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|
138 |
functable_set_length (r->ft, r->filter_length * 16); |
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|
139 |
functable_set_offset (r->ft, -r->filter_length / 2); |
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|
140 |
functable_set_multiplier (r->ft, 1 / 16.0); |
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|
141 |
|
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142 |
hanning_width = r->filter_length / 2; |
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|
143 |
functable_calculate (r->ft, func_sinc, NULL); |
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|
144 |
functable_calculate_multiply (r->ft, func_hanning, &hanning_width); |
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|
145 |
|
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|
146 |
//functable_test(r->ft, 0.5 * r->filter_length); |
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|
147 |
#if 0 |
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|
148 |
if (r->i_inc < 1.0) { |
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|
149 |
r->sinc_scale = r->i_inc; |
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|
150 |
if (r->sinc_scale == 0.5) { |
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|
151 |
/* strange things happen at integer multiples */ |
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152 |
r->sinc_scale = 1.0; |
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153 |
} |
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|
154 |
} else { |
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155 |
r->sinc_scale = 1.0; |
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|
156 |
} |
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|
157 |
#else |
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158 |
r->sinc_scale = 1.0; |
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159 |
#endif |
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|
160 |
|
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161 |
r->need_reinit = 0; |
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|
162 |
} |
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|
163 |
|
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164 |
while (r->o_size > 0) { |
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|
165 |
double midpoint; |
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|
166 |
int i; |
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|
167 |
int j; |
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|
168 |
|
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|
169 |
RESAMPLE_DEBUG ("i_start %g", r->i_start); |
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|
170 |
midpoint = r->i_start + (r->filter_length - 1) * 0.5 * r->i_inc; |
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|
171 |
if (midpoint > 0.5 * r->i_inc) { |
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|
172 |
RESAMPLE_ERROR ("inconsistent state"); |
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|
173 |
} |
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|
174 |
while (midpoint < -0.5 * r->i_inc) { |
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|
175 |
AudioresampleBuffer *buffer; |
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|
176 |
|
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|
177 |
buffer = audioresample_buffer_queue_pull (r->queue, r->sample_size); |
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|
178 |
if (buffer == NULL) { |
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|
179 |
RESAMPLE_ERROR ("buffer_queue_pull returned NULL"); |
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|
180 |
return; |
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|
181 |
} |
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|
182 |
|
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|
183 |
r->i_start += r->i_inc; |
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|
184 |
RESAMPLE_DEBUG ("pulling (i_start = %g)", r->i_start); |
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|
185 |
|
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|
186 |
midpoint += r->i_inc; |
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|
187 |
memmove (r->buffer, r->buffer + r->sample_size, |
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|
188 |
r->buffer_len - r->sample_size); |
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|
189 |
|
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|
190 |
memcpy (r->buffer + r->buffer_len - r->sample_size, buffer->data, |
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|
191 |
r->sample_size); |
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|
192 |
audioresample_buffer_unref (buffer); |
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|
193 |
} |
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|
194 |
|
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|
195 |
switch (r->format) { |
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|
196 |
case RESAMPLE_FORMAT_S16: |
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|
197 |
for (i = 0; i < r->n_channels; i++) { |
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|
198 |
double acc = 0; |
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|
199 |
double offset; |
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|
200 |
double x; |
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|
201 |
|
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|
202 |
for (j = 0; j < r->filter_length; j++) { |
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|
203 |
offset = (r->i_start + j * r->i_inc) * r->o_inc; |
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|
204 |
x = *(int16_t *) (r->buffer + i * sizeof (int16_t) + |
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|
205 |
j * r->sample_size); |
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|
206 |
acc += functable_evaluate (r->ft, offset) * x; |
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|
207 |
//acc += resample_sinc_window (offset, r->filter_length * 0.5, r->sinc_scale) * x; |
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|
208 |
} |
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|
209 |
if (acc < -32768.0) |
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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diff
changeset
|
210 |
acc = -32768.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
211 |
if (acc > 32767.0) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
212 |
acc = 32767.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
213 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
214 |
*(int16_t *) (r->o_buf + i * sizeof (int16_t)) = rint (acc); |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
215 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
216 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
217 |
case RESAMPLE_FORMAT_S32: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
218 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
219 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
220 |
double offset; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
221 |
double x; |
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Revision: 200949
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parents:
diff
changeset
|
222 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
223 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
224 |
offset = (r->i_start + j * r->i_inc) * r->o_inc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
225 |
x = *(int32_t *) (r->buffer + i * sizeof (int32_t) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
226 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
227 |
acc += functable_evaluate (r->ft, offset) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
228 |
//acc += resample_sinc_window (offset, r->filter_length * 0.5, r->sinc_scale) * x; |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
229 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
230 |
if (acc < -2147483648.0) |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
231 |
acc = -2147483648.0; |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
232 |
if (acc > 2147483647.0) |
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Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
233 |
acc = 2147483647.0; |
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Revision: 200949
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parents:
diff
changeset
|
234 |
|
0e761a78d257
Revision: 200949
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parents:
diff
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|
235 |
*(int32_t *) (r->o_buf + i * sizeof (int32_t)) = rint (acc); |
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Revision: 200949
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parents:
diff
changeset
|
236 |
} |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
237 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
238 |
case RESAMPLE_FORMAT_F32: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
239 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
240 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
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|
241 |
double offset; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
242 |
double x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
243 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
244 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
245 |
offset = (r->i_start + j * r->i_inc) * r->o_inc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
246 |
x = *(float *) (r->buffer + i * sizeof (float) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
247 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
248 |
acc += functable_evaluate (r->ft, offset) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
249 |
//acc += resample_sinc_window (offset, r->filter_length * 0.5, r->sinc_scale) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
250 |
} |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
251 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
252 |
*(float *) (r->o_buf + i * sizeof (float)) = acc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
253 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
254 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
255 |
case RESAMPLE_FORMAT_F64: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
256 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
257 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
258 |
double offset; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
259 |
double x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
260 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
261 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
262 |
offset = (r->i_start + j * r->i_inc) * r->o_inc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
263 |
x = *(double *) (r->buffer + i * sizeof (double) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
264 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
265 |
acc += functable_evaluate (r->ft, offset) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
266 |
//acc += resample_sinc_window (offset, r->filter_length * 0.5, r->sinc_scale) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
267 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
268 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
269 |
*(double *) (r->o_buf + i * sizeof (double)) = acc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
270 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
271 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
272 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
273 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
274 |
r->i_start -= 1.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
275 |
r->o_buf += r->sample_size; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
276 |
r->o_size -= r->sample_size; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
277 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
278 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
279 |
} |