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code.delx.au - pulseaudio/blob - src/pulsecore/sconv-s16le.c
4 This file is part of PulseAudio.
6 Copyright 2004-2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published
10 by the Free Software Foundation; either version 2 of the License,
11 or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <liboil/liboilfuncs.h>
32 #include <pulsecore/sconv.h>
33 #include <pulsecore/macro.h>
34 #include <pulsecore/log.h>
36 #include "endianmacros.h"
38 #include "sconv-s16le.h"
41 #define INT16_FROM PA_INT16_FROM_LE
45 #define INT16_TO PA_INT16_TO_LE
49 #ifdef WORDS_BIGENDIAN
56 void pa_sconv_s16le_to_float32ne(unsigned n
, const int16_t *a
, float *b
) {
64 *(b
++) = ((float) INT16_FROM(s
))/0x7FFF;
69 static const double add
= 0, factor
= 1.0/0x7FFF;
70 oil_scaleconv_f32_s16(b
, a
, n
, &add
, &factor
);
75 void pa_sconv_s16le_from_float32ne(unsigned n
, const float *a
, int16_t *b
) {
86 s
= (int16_t) (v
* 0x7FFF);
92 static const double add
= 0, factor
= 0x7FFF;
93 oil_scaleconv_s16_f32(b
, a
, n
, &add
, &factor
);
98 void pa_sconv_s16le_to_float32re(unsigned n
, const int16_t *a
, float *b
) {
104 float k
= ((float) INT16_FROM(s
))/0x7FFF;
105 uint32_t *j
= (uint32_t*) &k
;
106 *j
= PA_UINT32_SWAP(*j
);
111 void pa_sconv_s16le_from_float32re(unsigned n
, const float *a
, int16_t *b
) {
118 uint32_t *j
= (uint32_t*) &v
;
119 *j
= PA_UINT32_SWAP(*j
);
121 s
= (int16_t) (v
* 0x7FFF);
122 *(b
++) = INT16_TO(s
);