[src/trunk]: src/sys/dev Better solution to mulaw/alaw conversion on big endi...

[nat <nat%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7822daa66da8
branches:  trunk
changeset: 825012:7822daa66da8
user:      nat <nat%NetBSD.org@localhost>
date:      Mon Jun 26 12:17:09 2017 +0000

description:
Better solution to mulaw/alaw conversion on big endian systems/sound
devices.

diffstat:

 sys/dev/mulaw.c |  20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

diffs (70 lines):

diff -r 40d10adad71c -r 7822daa66da8 sys/dev/mulaw.c
--- a/sys/dev/mulaw.c   Mon Jun 26 11:45:46 2017 +0000
+++ b/sys/dev/mulaw.c   Mon Jun 26 12:17:09 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mulaw.c,v 1.31 2017/06/26 11:45:46 nat Exp $   */
+/*     $NetBSD: mulaw.c,v 1.32 2017/06/26 12:17:09 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 1.31 2017/06/26 11:45:46 nat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mulaw.c,v 1.32 2017/06/26 12:17:09 nat Exp $");
 
 #include <sys/types.h>
 #include <sys/systm.h>
@@ -321,10 +321,10 @@
                break;                                                  \
        case AUDIO_ENCODING_ULINEAR_BE:                                 \
                FILTER_LOOP_PROLOGUE(this->src, 1, dst, hw, m) {        \
-                       j = hw - 2;                                     \
+                       j = 2;                                          \
                        d[0] = mulawtolin16[s[0]][0];                   \
                        d[1] = mulawtolin16[s[0]][1];                   \
-                       while (j > 0 && j < hw)                         \
+                       while (j < hw)                                  \
                                d[j++] = 0;                             \
                } FILTER_LOOP_EPILOGUE(this->src, dst);                 \
                break;                                                  \
@@ -339,10 +339,10 @@
                break;                                                  \
        case AUDIO_ENCODING_SLINEAR_BE:                                 \
                FILTER_LOOP_PROLOGUE(this->src, 1, dst, hw, m) {        \
-                       j = hw - 2;                                     \
+                       j = 2;                                          \
                        d[0] = mulawtolin16[s[0]][0] ^ 0x80;            \
                        d[1] = mulawtolin16[s[0]][1];                   \
-                       while (j > 0 && j < hw)                         \
+                       while (j < hw)                                  \
                                d[j++] = 0;                             \
                } FILTER_LOOP_EPILOGUE(this->src, dst);                 \
                break;                                                  \
@@ -456,10 +456,10 @@
                break;                                                  \
        case AUDIO_ENCODING_ULINEAR_BE:                                 \
                FILTER_LOOP_PROLOGUE(this->src, 1, dst, hw, m) {        \
-                       j = hw - 2;                                     \
+                       j = 2;                                          \
                        d[0] = alawtolin16[s[0]][0];                    \
                        d[1] = alawtolin16[s[0]][1];                    \
-                       while (j > 0 && j < hw)                         \
+                       while (j < hw)                                  \
                                d[j++] = 0;                             \
                } FILTER_LOOP_EPILOGUE(this->src, dst);                 \
                break;                                                  \
@@ -474,10 +474,10 @@
                break;                                                  \
        case AUDIO_ENCODING_SLINEAR_BE:                                 \
                FILTER_LOOP_PROLOGUE(this->src, 1, dst, hw, m) {        \
-                       j = hw - 2;                                     \
+                       j = 2;                                          \
                        d[0] = alawtolin16[s[0]][0] ^ 0x80;             \
                        d[1] = alawtolin16[s[0]][1];                    \
-                       while (j > 0 && j < hw)                         \
+                       while (j < hw)                                  \
                                d[j++] = 0;                             \
                } FILTER_LOOP_EPILOGUE(this->src, dst);                 \
                break;                                                  \