diff options
Diffstat (limited to 'src/pulsecore/sconv-s16le.c')
| -rw-r--r-- | src/pulsecore/sconv-s16le.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/pulsecore/sconv-s16le.c b/src/pulsecore/sconv-s16le.c new file mode 100644 index 00000000..90e9b6d2 --- /dev/null +++ b/src/pulsecore/sconv-s16le.c @@ -0,0 +1,251 @@ +/* $Id$ */ + +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + + PulseAudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + PulseAudio 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 Lesser General Public License + along with PulseAudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +/* Despite the name of this file we implement S32 handling here, too. */ + +#include <inttypes.h> +#include <stdio.h> + +#include <liboil/liboilfuncs.h> + +#include <pulsecore/sconv.h> +#include <pulsecore/macro.h> +#include <pulsecore/log.h> + +#include "endianmacros.h" + +#include "sconv-s16le.h" + +#ifndef INT16_FROM +#define INT16_FROM PA_INT16_FROM_LE +#endif + +#ifndef INT16_TO +#define INT16_TO PA_INT16_TO_LE +#endif + +#ifndef INT32_FROM +#define INT32_FROM PA_INT32_FROM_LE +#endif + +#ifndef INT32_TO +#define INT32_TO PA_INT32_TO_LE +#endif + +#ifndef SWAP_WORDS +#ifdef WORDS_BIGENDIAN +#define SWAP_WORDS 1 +#else +#define SWAP_WORDS 0 +#endif +#endif + +void pa_sconv_s16le_to_float32ne(unsigned n, const int16_t *a, float *b) { + pa_assert(a); + pa_assert(b); + +#if SWAP_WORDS == 1 + + for (; n > 0; n--) { + int16_t s = *(a++); + *(b++) = ((float) INT16_FROM(s))/0x7FFF; + } + +#else +{ + static const double add = 0, factor = 1.0/0x7FFF; + oil_scaleconv_f32_s16(b, a, n, &add, &factor); +} +#endif +} + +void pa_sconv_s32le_to_float32ne(unsigned n, const int32_t *a, float *b) { + pa_assert(a); + pa_assert(b); + +#if SWAP_WORDS == 1 + + for (; n > 0; n--) { + int32_t s = *(a++); + *(b++) = (float) (((double) INT32_FROM(s))/0x7FFFFFFF); + } + +#else +{ + static const double add = 0, factor = 1.0/0x7FFFFFFF; + oil_scaleconv_f32_s32(b, a, n, &add, &factor); +} +#endif +} + +void pa_sconv_s16le_from_float32ne(unsigned n, const float *a, int16_t *b) { + pa_assert(a); + pa_assert(b); + +#if SWAP_WORDS == 1 + + for (; n > 0; n--) { + int16_t s; + float v = *(a++); + + v = PA_CLAMP_UNLIKELY(v, -1, 1); + s = (int16_t) (v * 0x7FFF); + *(b++) = INT16_TO(s); + } + +#else +{ + static const double add = 0, factor = 0x7FFF; + oil_scaleconv_s16_f32(b, a, n, &add, &factor); +} +#endif +} + +void pa_sconv_s32le_from_float32ne(unsigned n, const float *a, int32_t *b) { + pa_assert(a); + pa_assert(b); + +#if SWAP_WORDS == 1 + + for (; n > 0; n--) { + int32_t s; + float v = *(a++); + + v = PA_CLAMP_UNLIKELY(v, -1, 1); + s = (int32_t) ((double) v * (double) 0x7FFFFFFF); + *(b++) = INT32_TO(s); + } + +#else +{ + static const double add = 0, factor = 0x7FFFFFFF; + oil_scaleconv_s32_f32(b, a, n, &add, &factor); +} +#endif +} + +void pa_sconv_s16le_to_float32re(unsigned n, const int16_t *a, float *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int16_t s = *(a++); + float k = ((float) INT16_FROM(s))/0x7FFF; + uint32_t *j = (uint32_t*) &k; + *j = PA_UINT32_SWAP(*j); + *(b++) = k; + } +} + +void pa_sconv_s32le_to_float32re(unsigned n, const int32_t *a, float *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int32_t s = *(a++); + float k = (float) (((double) INT32_FROM(s))/0x7FFFFFFF); + uint32_t *j = (uint32_t*) &k; + *j = PA_UINT32_SWAP(*j); + *(b++) = k; + } +} + +void pa_sconv_s16le_from_float32re(unsigned n, const float *a, int16_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int16_t s; + float v = *(a++); + uint32_t *j = (uint32_t*) &v; + *j = PA_UINT32_SWAP(*j); + v = PA_CLAMP_UNLIKELY(v, -1, 1); + s = (int16_t) (v * 0x7FFF); + *(b++) = INT16_TO(s); + } +} + +void pa_sconv_s32le_from_float32re(unsigned n, const float *a, int32_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int32_t s; + float v = *(a++); + uint32_t *j = (uint32_t*) &v; + *j = PA_UINT32_SWAP(*j); + v = PA_CLAMP_UNLIKELY(v, -1, 1); + s = (int32_t) ((double) v * 0x7FFFFFFF); + *(b++) = INT32_TO(s); + } +} + +void pa_sconv_s32le_to_s16ne(unsigned n, const int32_t*a, int16_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + *b = (int16_t) (INT32_FROM(*a) >> 16); + a++; + b++; + } +} + +void pa_sconv_s32le_to_s16re(unsigned n, const int32_t*a, int16_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int16_t s = (int16_t) (INT32_FROM(*a) >> 16); + *b = PA_UINT32_SWAP(s); + a++; + b++; + } +} + +void pa_sconv_s32le_from_s16ne(unsigned n, const int16_t *a, int32_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + *b = INT32_TO(((int32_t) *a) << 16); + a++; + b++; + } +} + +void pa_sconv_s32le_from_s16re(unsigned n, const int16_t *a, int32_t *b) { + pa_assert(a); + pa_assert(b); + + for (; n > 0; n--) { + int32_t s = ((int32_t) PA_UINT16_SWAP(*a)) << 16; + *b = INT32_TO(s); + a++; + b++; + } +} |