mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
dd10c98241
* implement inner loops using liboil * drop "typeid" stuff * add support for channel maps * add support for seperate volumes per channel * add support for hardware mixer settings (only module-oss implements this for now) * fix a lot of types for _t suffix git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@463 fefdeb5f-60dc-0310-8127-8f9354f1896f
101 lines
2.1 KiB
C
101 lines
2.1 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 Lesser 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 Lesser 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 <liboil/liboilfuncs.h>
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#include "endianmacros.h"
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#include "sconv.h"
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#include "sconv-s16le.h"
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#include "log.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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#ifndef SWAP_WORDS
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#ifdef WORDS_BIGENDIAN
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#define SWAP_WORDS 1
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#else
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#define SWAP_WORDS 0
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#endif
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#endif
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void pa_sconv_s16le_to_float32ne(unsigned n, const void *a, float *b) {
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const int16_t *ca = a;
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assert(a);
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assert(b);
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#if SWAP_WORDS == 1
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for (; n > 0; n--) {
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int16_t s = *(ca++);
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*(b++) = ((float) INT16_FROM(s))/0x7FFF;
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}
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#else
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{
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static const double add = 0, factor = 1.0/0x7FFF;
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oil_scaleconv_f32_s16(b, ca, n, &add, &factor);
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}
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#endif
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}
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void pa_sconv_s16le_from_float32ne(unsigned n, const float *a, void *b) {
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int16_t *cb = b;
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assert(a);
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assert(b);
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#if SWAP_WORDS == 1
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for (; n > 0; n--) {
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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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*(cb++) = INT16_TO(s);
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}
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#else
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{
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static const double add = 0, factor = 0x7FFF;
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oil_scaleconv_s16_f32(cb, a, n, &add, &factor);
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}
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#endif
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}
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