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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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41f6aea8fd
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@90 fefdeb5f-60dc-0310-8127-8f9354f1896f
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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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 <assert.h>
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#include <inttypes.h>
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#include "endianmacros.h"
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#include "sconv.h"
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#ifndef INT16_FROM
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#define INT16_FROM INT16_FROM_LE
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#endif
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#ifndef INT16_TO
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#define INT16_TO INT16_TO_LE
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#endif
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void pa_sconv_s16le_to_float32(unsigned n, const void *a, unsigned an, float *b) {
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const int16_t *ca = a;
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assert(n && a && an && b);
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for (; n > 0; n--) {
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unsigned i;
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float sum = 0;
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for (i = 0; i < an; i++) {
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int16_t s = *(ca++);
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sum += ((float) INT16_FROM(s))/0x7FFF;
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}
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if (sum > 1)
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sum = 1;
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if (sum < -1)
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sum = -1;
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*(b++) = sum;
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}
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}
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void pa_sconv_s16le_from_float32(unsigned n, const float *a, void *b, unsigned bn) {
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int16_t *cb = b;
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assert(n && a && b && bn);
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for (; n > 0; n--) {
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unsigned i;
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int16_t s;
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float v = *(a++);
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if (v > 1)
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v = 1;
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if (v < -1)
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v = -1;
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s = (int16_t) (v * 0x7FFF);
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s = INT16_TO(s);
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for (i = 0; i < bn; i++)
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*(cb++) = s;
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}
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}
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