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uaudio_set_params(): Set conversions: 

- 8bit slinear/ulinear to 16bit slinear for playing
  - 16bit slinear to 8bit slinear/ulinear for recording
This commit is contained in:
kent 2002-03-15 17:20:14 +00:00
parent 9fee4daa5f
commit 3ca7d89bcf
1 changed files with 40 additions and 25 deletions
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65
sys/dev/usb/uaudio.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uaudio.c,v 1.51 2002/03/12 15:12:03 kent Exp $ */
/* $NetBSD: uaudio.c,v 1.52 2002/03/15 17:20:14 kent Exp $ */
/*
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -44,7 +44,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uaudio.c,v 1.51 2002/03/12 15:12:03 kent Exp $");
__KERNEL_RCSID(0, "$NetBSD: uaudio.c,v 1.52 2002/03/15 17:20:14 kent Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -2381,39 +2381,54 @@ uaudio_set_params(void *addr, int setmode, int usemode,
enc = p->encoding;
switch (enc) {
case AUDIO_ENCODING_SLINEAR_BE:
if (p->precision == 16) {
/* FALLTHROUGH */
case AUDIO_ENCODING_SLINEAR_LE:
if (enc == AUDIO_ENCODING_SLINEAR_BE
&& p->precision == 16 && (flags & HAS_16)) {
swcode = swap_bytes;
enc = AUDIO_ENCODING_SLINEAR_LE;
} else if (p->precision == 8 && !(flags & HAS_8)) {
swcode = change_sign8;
enc = AUDIO_ENCODING_ULINEAR_LE;
}
break;
case AUDIO_ENCODING_SLINEAR_LE:
if (p->precision == 8 && !(flags & HAS_8)) {
swcode = change_sign8;
enc = AUDIO_ENCODING_ULINEAR_LE;
} else if (p->precision == 8) {
if (flags & HAS_8) {
/* No conversion */
} else if (flags & HAS_8U) {
swcode = change_sign8;
enc = AUDIO_ENCODING_ULINEAR_LE;
} else if (flags & HAS_16) {
factor = 2;
p->hw_precision = 16;
if (mode == AUMODE_PLAY)
swcode = linear8_to_linear16_le;
else
swcode = linear16_to_linear8_le;
}
}
break;
case AUDIO_ENCODING_ULINEAR_BE:
/* FALLTHROUGH */
case AUDIO_ENCODING_ULINEAR_LE:
if (p->precision == 16) {
if (mode == AUMODE_PLAY)
if (enc == AUDIO_ENCODING_ULINEAR_LE)
swcode = change_sign16_le;
else if (mode == AUMODE_PLAY)
swcode = swap_bytes_change_sign16_le;
else
swcode = change_sign16_swap_bytes_le;
enc = AUDIO_ENCODING_SLINEAR_LE;
} else if (p->precision == 8 && !(flags & HAS_8U)) {
swcode = change_sign8;
enc = AUDIO_ENCODING_SLINEAR_LE;
}
break;
case AUDIO_ENCODING_ULINEAR_LE:
if (p->precision == 16) {
swcode = change_sign16_le;
enc = AUDIO_ENCODING_SLINEAR_LE;
} else if (p->precision == 8 && !(flags & HAS_8U)) {
swcode = change_sign8;
enc = AUDIO_ENCODING_SLINEAR_LE;
} else if (p->precision == 8) {
if (flags & HAS_8U) {
/* No conversion */
} else if (flags & HAS_8) {
swcode = change_sign8;
enc = AUDIO_ENCODING_SLINEAR_LE;
} else if (flags & HAS_16) {
factor = 2;
p->hw_precision = 16;
enc = AUDIO_ENCODING_SLINEAR_LE;
if (mode == AUMODE_PLAY)
swcode = ulinear8_to_slinear16_le;
else
swcode = slinear16_to_ulinear8_le;
}
}
break;
case AUDIO_ENCODING_ULAW: