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-rw-r--r--src/pulsecore/sconv.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/pulsecore/sconv.c b/src/pulsecore/sconv.c
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+++ b/src/pulsecore/sconv.c
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+/* $Id$ */
+
+/***
+ 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;
+ }
+}