diff options
Diffstat (limited to 'src/pulsecore/sconv.c')
-rw-r--r-- | src/pulsecore/sconv.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/pulsecore/sconv.c b/src/pulsecore/sconv.c new file mode 100644 index 00000000..ff2a0110 --- /dev/null +++ b/src/pulsecore/sconv.c @@ -0,0 +1,169 @@ +/* $Id$ */ + +/*** + This file is part of PulseAudio. + + 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 + +#include <stdio.h> +#include <stdlib.h> +#include <assert.h> + +#include <liboil/liboilfuncs.h> +#include <liboil/liboil.h> + +#include <pulsecore/g711.h> + +#include "endianmacros.h" +#include "sconv-s16le.h" +#include "sconv-s16be.h" + +#include "sconv.h" + +static void u8_to_float32ne(unsigned n, const void *a, float *b) { + const uint8_t *ca = a; + static const double add = -128.0/127.0, factor = 1.0/127.0; + + assert(a); + assert(b); + + oil_scaleconv_f32_u8(b, ca, n, &add, &factor); +} + +static void u8_from_float32ne(unsigned n, const float *a, void *b) { + uint8_t *cb = b; + static const double add = 128.0, factor = 127.0; + + assert(a); + assert(b); + + oil_scaleconv_u8_f32(cb, a, n, &add, &factor); +} + +static void float32ne_to_float32ne(unsigned n, const void *a, float *b) { + assert(a); + assert(b); + + oil_memcpy(b, a, sizeof(float) * n); +} + +static void float32ne_from_float32ne(unsigned n, const float *a, void *b) { + assert(a); + assert(b); + + oil_memcpy(b, a, sizeof(float) * n); +} + +static void ulaw_to_float32ne(unsigned n, const void *a, float *b) { + const uint8_t *ca = a; + + assert(a); + assert(b); + + for (; n > 0; n--) + *(b++) = st_ulaw2linear16(*(ca++)) * 1.0F / 0x7FFF; +} + +static void ulaw_from_float32ne(unsigned n, const float *a, void *b) { + uint8_t *cb = b; + + assert(a); + assert(b); + + for (; n > 0; n--) { + float v = *(a++); + + if (v > 1) + v = 1; + + if (v < -1) + v = -1; + + *(cb++) = st_14linear2ulaw((int16_t) (v * 0x1FFF)); + } +} + +static void alaw_to_float32ne(unsigned n, const void *a, float *b) { + const uint8_t *ca = a; + + assert(a); + assert(b); + + for (; n > 0; n--) + *(b++) = st_alaw2linear16(*(ca++)) * 1.0F / 0x7FFF; +} + +static void alaw_from_float32ne(unsigned n, const float *a, void *b) { + uint8_t *cb = b; + + assert(a); + assert(b); + + for (; n > 0; n--) { + float v = *(a++); + + if (v > 1) + v = 1; + + if (v < -1) + v = -1; + + *(cb++) = st_13linear2alaw((int16_t) (v * 0xFFF)); + } +} + +pa_convert_to_float32ne_func_t pa_get_convert_to_float32ne_function(pa_sample_format_t f) { + switch(f) { + case PA_SAMPLE_U8: + return u8_to_float32ne; + case PA_SAMPLE_S16LE: + return pa_sconv_s16le_to_float32ne; + case PA_SAMPLE_S16BE: + return pa_sconv_s16be_to_float32ne; + case PA_SAMPLE_FLOAT32NE: + return float32ne_to_float32ne; + case PA_SAMPLE_ALAW: + return alaw_to_float32ne; + case PA_SAMPLE_ULAW: + return ulaw_to_float32ne; + default: + return NULL; + } +} + +pa_convert_from_float32ne_func_t pa_get_convert_from_float32ne_function(pa_sample_format_t f) { + switch(f) { + case PA_SAMPLE_U8: + return u8_from_float32ne; + case PA_SAMPLE_S16LE: + return pa_sconv_s16le_from_float32ne; + case PA_SAMPLE_S16BE: + return pa_sconv_s16be_from_float32ne; + case PA_SAMPLE_FLOAT32NE: + return float32ne_from_float32ne; + case PA_SAMPLE_ALAW: + return alaw_from_float32ne; + case PA_SAMPLE_ULAW: + return ulaw_from_float32ne; + default: + return NULL; + } +} |