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Use LINEARNTOMULAW for 8 bits as well.

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This commit is contained in:
nat 2017-06-25 02:16:41 +00:00
parent f10f926732
commit ef1ca21e92
2 changed files with 6 additions and 27 deletions
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27
sys/dev/mulaw.c
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@ -1,4 +1,4 @@
/* $NetBSD: mulaw.c,v 1.29 2017/06/20 07:21:50 nat Exp $ */
/* $NetBSD: mulaw.c,v 1.30 2017/06/25 02:16:41 nat Exp $ */
/*
* Copyright (c) 1991-1993 Regents of the University of California.
@ -35,7 +35,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.29 2017/06/20 07:21:50 nat Exp $");
__KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.30 2017/06/25 02:16:41 nat Exp $");
#include <sys/types.h>
#include <sys/systm.h>
@ -406,28 +406,7 @@ LINEARNTOMULAW(32, 32)
LINEARNTOMULAW(24, 32)
LINEARNTOMULAW(24, 24)
LINEARNTOMULAW(16, 16)
DEFINE_FILTER(linear8_to_mulaw)
{
stream_filter_t *this;
int m, err;
this = (stream_filter_t *)self;
if ((err = this->prev->fetch_to(sc, this->prev, this->src, max_used)))
return err;
m = dst->end - dst->start;
m = min(m, max_used);
if (this->src->param.encoding == AUDIO_ENCODING_ULINEAR_LE) {
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintomulaw[*s];
} FILTER_LOOP_EPILOGUE(this->src, dst);
} else { /* SLINEAR_LE */
FILTER_LOOP_PROLOGUE(this->src, 1, dst, 1, m) {
*d = lintomulaw[*s ^ 0x80];
} FILTER_LOOP_EPILOGUE(this->src, dst);
}
return 0;
}
LINEARNTOMULAW(8, 8)
DEFINE_FILTER(alaw_to_linear8)
{

6
sys/dev/mulaw.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: mulaw.h,v 1.23 2017/06/25 02:14:16 nat Exp $ */
/* $NetBSD: mulaw.h,v 1.24 2017/06/25 02:16:41 nat Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@ -46,8 +46,8 @@ extern stream_filter_factory_t linear16_16_to_mulaw;
#define linear16_to_mulaw linear16_16_to_mulaw
/* Convert 8-bit mu-law to/from 8 bit unsigned/signed linear. */
extern stream_filter_factory_t mulaw_to_linear8;
extern stream_filter_factory_t linear8_to_mulaw;
#define linear8_8_to_mulaw linear8_to_mulaw
extern stream_filter_factory_t linear8_8_to_mulaw;
#define linear8_to_mulaw linear8_8_to_mulaw
/* Convert 8-bit alaw to/from 32 bit unsigned/signed linear. */
extern stream_filter_factory_t alaw_to_linear32;