author | Pat Downey <patd@symbian.org> |
Wed, 01 Sep 2010 12:16:41 +0100 | |
branch | RCL_3 |
changeset 30 | 7e817e7e631c |
parent 0 | 0e761a78d257 |
permissions | -rw-r--r-- |
0
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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 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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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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void |
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resample_scale_ref (ResampleState * r) |
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{ |
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if (r->need_reinit) { |
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RESAMPLE_DEBUG ("sample size %d", r->sample_size); |
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if (r->buffer) |
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free (r->buffer); |
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r->buffer_len = r->sample_size * r->filter_length; |
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r->buffer = malloc (r->buffer_len); |
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memset (r->buffer, 0, r->buffer_len); |
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r->buffer_filled = 0; |
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r->i_inc = r->o_rate / r->i_rate; |
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r->o_inc = r->i_rate / r->o_rate; |
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RESAMPLE_DEBUG ("i_inc %g o_inc %g", r->i_inc, r->o_inc); |
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r->i_start = -r->i_inc * r->filter_length; |
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r->need_reinit = 0; |
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#if 0 |
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if (r->i_inc < 1.0) { |
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r->sinc_scale = r->i_inc; |
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if (r->sinc_scale == 0.5) { |
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/* strange things happen at integer multiples */ |
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r->sinc_scale = 1.0; |
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} |
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} else { |
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r->sinc_scale = 1.0; |
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} |
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#else |
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r->sinc_scale = 1.0; |
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#endif |
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} |
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RESAMPLE_DEBUG ("asked to resample %d bytes", r->o_size); |
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RESAMPLE_DEBUG ("%d bytes in queue", |
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audioresample_buffer_queue_get_depth (r->queue)); |
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105 |
while (r->o_size >= r->sample_size) { |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
106 |
double midpoint; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
107 |
int i; |
0e761a78d257
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parents:
diff
changeset
|
108 |
int j; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
109 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
110 |
midpoint = r->i_start + (r->filter_length - 1) * 0.5 * r->i_inc; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
111 |
RESAMPLE_DEBUG |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
112 |
("still need to output %d bytes, %d input left, i_start %g, midpoint %f", |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
113 |
r->o_size, audioresample_buffer_queue_get_depth (r->queue), r->i_start, |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
114 |
midpoint); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
115 |
if (midpoint > 0.5 * r->i_inc) { |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
116 |
RESAMPLE_ERROR ("inconsistent state"); |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
117 |
} |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
118 |
while (midpoint < -0.5 * r->i_inc) { |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
119 |
AudioresampleBuffer *buffer; |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
120 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
121 |
RESAMPLE_DEBUG ("midpoint %f < %f, r->i_inc %f", midpoint, |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
122 |
-0.5 * r->i_inc, r->i_inc); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
123 |
buffer = audioresample_buffer_queue_pull (r->queue, r->sample_size); |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
124 |
if (buffer == NULL) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
125 |
/* FIXME: for the first buffer, this isn't necessarily an error, |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
126 |
* since because of the filter length we'll output less buffers. |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
127 |
* deal with that so we don't print to console */ |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
128 |
RESAMPLE_ERROR ("buffer_queue_pull returned NULL"); |
0e761a78d257
Revision: 200949
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parents:
diff
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|
129 |
return; |
0e761a78d257
Revision: 200949
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parents:
diff
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|
130 |
} |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
131 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
132 |
r->i_start += r->i_inc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
133 |
RESAMPLE_DEBUG ("pulling (i_start = %g)", r->i_start); |
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
134 |
|
0e761a78d257
Revision: 200949
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parents:
diff
changeset
|
135 |
midpoint += r->i_inc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
136 |
memmove (r->buffer, r->buffer + r->sample_size, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
137 |
r->buffer_len - r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
138 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
139 |
memcpy (r->buffer + r->buffer_len - r->sample_size, buffer->data, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
140 |
r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
141 |
r->buffer_filled = MIN (r->buffer_filled + r->sample_size, r->buffer_len); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
142 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
143 |
audioresample_buffer_unref (buffer); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
144 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
145 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
146 |
switch (r->format) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
147 |
case RESAMPLE_FORMAT_S16: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
148 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
149 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
150 |
double offset; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
151 |
double x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
152 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
153 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
154 |
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
|
155 |
x = *(int16_t *) (r->buffer + i * sizeof (int16_t) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
156 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
157 |
acc += |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
158 |
resample_sinc_window (offset, r->filter_length * 0.5, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
159 |
r->sinc_scale) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
160 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
161 |
if (acc < -32768.0) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
162 |
acc = -32768.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
163 |
if (acc > 32767.0) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
164 |
acc = 32767.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
165 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
166 |
*(int16_t *) (r->o_buf + i * sizeof (int16_t)) = rint (acc); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
167 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
168 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
169 |
case RESAMPLE_FORMAT_S32: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
170 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
171 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
172 |
double offset; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
173 |
double x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
174 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
175 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
176 |
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
|
177 |
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
|
178 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
179 |
acc += |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
180 |
resample_sinc_window (offset, r->filter_length * 0.5, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
181 |
r->sinc_scale) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
182 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
183 |
if (acc < -2147483648.0) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
184 |
acc = -2147483648.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
185 |
if (acc > 2147483647.0) |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
186 |
acc = 2147483647.0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
187 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
188 |
*(int32_t *) (r->o_buf + i * sizeof (int32_t)) = rint (acc); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
189 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
190 |
break; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
191 |
case RESAMPLE_FORMAT_F32: |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
192 |
for (i = 0; i < r->n_channels; i++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
193 |
double acc = 0; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
194 |
double offset; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
195 |
double x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
196 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
197 |
for (j = 0; j < r->filter_length; j++) { |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
198 |
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
|
199 |
x = *(float *) (r->buffer + i * sizeof (float) + |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
200 |
j * r->sample_size); |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
201 |
acc += |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
202 |
resample_sinc_window (offset, r->filter_length * 0.5, |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
203 |
r->sinc_scale) * x; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
204 |
} |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
205 |
|
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
206 |
*(float *) (r->o_buf + i * sizeof (float)) = acc; |
0e761a78d257
Revision: 200949
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
207 |
} |
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Revision: 200949
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break; |
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case RESAMPLE_FORMAT_F64: |
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for (i = 0; i < r->n_channels; i++) { |
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double acc = 0; |
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double offset; |
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double x; |
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|
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for (j = 0; j < r->filter_length; j++) { |
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offset = (r->i_start + j * r->i_inc) * r->o_inc; |
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x = *(double *) (r->buffer + i * sizeof (double) + |
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j * r->sample_size); |
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acc += |
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resample_sinc_window (offset, r->filter_length * 0.5, |
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r->sinc_scale) * x; |
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} |
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|
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*(double *) (r->o_buf + i * sizeof (double)) = acc; |
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} |
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break; |
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} |
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|
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r->i_start -= 1.0; |
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r->o_buf += r->sample_size; |
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r->o_size -= r->sample_size; |
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} |
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} |