diff options
Diffstat (limited to 'dll/src/zita-resampler/libs/resampler-table.cc')
| -rw-r--r-- | dll/src/zita-resampler/libs/resampler-table.cc | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/dll/src/zita-resampler/libs/resampler-table.cc b/dll/src/zita-resampler/libs/resampler-table.cc deleted file mode 100644 index 5fc765f..0000000 --- a/dll/src/zita-resampler/libs/resampler-table.cc +++ /dev/null @@ -1,161 +0,0 @@ -// ----------------------------------------------------------------------------
-//
-// Copyright (C) 2006-2012 Fons Adriaensen <fons@linuxaudio.org>
-//
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program. If not, see <http://www.gnu.org/licenses/>.
-//
-// ----------------------------------------------------------------------------
-
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <math.h>
-#include <zita-resampler/resampler-table.h>
-
-
-int zita_resampler_major_version (void)
-{
- return ZITA_RESAMPLER_MAJOR_VERSION;
-}
-
-
-int zita_resampler_minor_version (void)
-{
- return ZITA_RESAMPLER_MINOR_VERSION;
-}
-
-
-static double sinc (double x)
-{
- x = fabs (x);
- if (x < 1e-6) return 1.0;
- x *= M_PI;
- return sin (x) / x;
-}
-
-
-static double wind (double x)
-{
- x = fabs (x);
- if (x >= 1.0) return 0.0f;
- x *= M_PI;
- return 0.384 + 0.500 * cos (x) + 0.116 * cos (2 * x);
-}
-
-
-
-Resampler_table *Resampler_table::_list = 0;
-Resampler_mutex Resampler_table::_mutex;
-
-
-Resampler_table::Resampler_table (double fr, unsigned int hl, unsigned int np) :
- _next (0),
- _refc (0),
- _fr (fr),
- _hl (hl),
- _np (np)
-{
- unsigned int i, j;
- double t;
- float *p;
-
- _ctab = new float [hl * (np + 1)];
- p = _ctab;
- for (j = 0; j <= np; j++)
- {
- t = (double) j / (double) np;
- for (i = 0; i < hl; i++)
- {
- p [hl - i - 1] = (float)(fr * sinc (t * fr) * wind (t / hl));
- t += 1;
- }
- p += hl;
- }
-}
-
-
-Resampler_table::~Resampler_table (void)
-{
- delete[] _ctab;
-}
-
-
-Resampler_table *Resampler_table::create (double fr, unsigned int hl, unsigned int np)
-{
- Resampler_table *P;
-
- _mutex.lock ();
- P = _list;
- while (P)
- {
- if ((fr >= P->_fr * 0.999) && (fr <= P->_fr * 1.001) && (hl == P->_hl) && (np == P->_np))
- {
- P->_refc++;
- _mutex.unlock ();
- return P;
- }
- P = P->_next;
- }
- P = new Resampler_table (fr, hl, np);
- P->_refc = 1;
- P->_next = _list;
- _list = P;
- _mutex.unlock ();
- return P;
-}
-
-
-void Resampler_table::destroy (Resampler_table *T)
-{
- Resampler_table *P, *Q;
-
- _mutex.lock ();
- if (T)
- {
- T->_refc--;
- if (T->_refc == 0)
- {
- P = _list;
- Q = 0;
- while (P)
- {
- if (P == T)
- {
- if (Q) Q->_next = T->_next;
- else _list = T->_next;
- break;
- }
- Q = P;
- P = P->_next;
- }
- delete T;
- }
- }
- _mutex.unlock ();
-}
-
-
-void Resampler_table::print_list (void)
-{
- Resampler_table *P;
-
- printf ("Resampler table\n----\n");
- for (P = _list; P; P = P->_next)
- {
- printf ("refc = %3d fr = %10.6lf hl = %4d np = %4d\n", P->_refc, P->_fr, P->_hl, P->_np);
- }
- printf ("----\n\n");
-}
-
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