NetBSD/sys/dev/ic/msm6258.c

301 lines
6.7 KiB
C

/* $NetBSD: msm6258.c,v 1.11 2003/09/07 04:24:07 isaki Exp $ */
/*
* Copyright (c) 2001 Tetsuya Isaki. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* OKI MSM6258 ADPCM voice synthesizer codec.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: msm6258.c,v 1.11 2003/09/07 04:24:07 isaki Exp $");
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/select.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/auconv.h>
#include <dev/audiovar.h>
#include <dev/mulaw.h>
#include <dev/ic/msm6258var.h>
struct msm6258_codecvar {
/* ADPCM stream must be converted in order. */
u_char mc_buf[AU_RING_SIZE]; /* XXX */
short mc_amp;
char mc_estim;
};
struct msm6258_softc {
struct device sc_dev;
struct msm6258_codecvar *sc_mc;
/* MD vars follow */
};
static inline u_char pcm2adpcm_step(struct msm6258_codecvar *, short);
static inline short adpcm2pcm_step(struct msm6258_codecvar *, u_char);
static int adpcm_estimindex[16] = {
2, 6, 10, 14, 18, 22, 26, 30,
-2, -6, -10, -14, -18, -22, -26, -30
};
static int adpcm_estim[49] = {
16, 17, 19, 21, 23, 25, 28, 31, 34, 37,
41, 45, 50, 55, 60, 66, 73, 80, 88, 97,
107, 118, 130, 143, 157, 173, 190, 209, 230, 253,
279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
};
static int adpcm_estimstep[16] = {
-1, -1, -1, -1, 2, 4, 6, 8,
-1, -1, -1, -1, 2, 4, 6, 8
};
void *
msm6258_codec_init (void)
{
struct msm6258_codecvar *r;
r = malloc (sizeof(*r), M_DEVBUF, M_NOWAIT);
if (r == 0)
return 0;
r->mc_amp = r->mc_estim = 0;
return r;
}
int
msm6258_codec_open(void *hdl)
{
struct msm6258_softc *sc = hdl;
struct msm6258_codecvar *mc = sc->sc_mc;
mc->mc_amp = 0;
mc->mc_estim = 0;
return 0;
}
/*
* signed 16bit linear PCM -> OkiADPCM
*/
static inline u_char
pcm2adpcm_step(struct msm6258_codecvar *mc, short a)
{
int estim = (int)mc->mc_estim;
int df;
short dl, c;
unsigned char b;
unsigned char s;
df = a - mc->mc_amp;
dl = adpcm_estim[estim];
c = (df / 16) * 8 / dl;
if (df < 0) {
b = (unsigned char)(-c) / 2;
s = 0x08;
} else {
b = (unsigned char)(c) / 2;
s = 0;
}
if (b > 7)
b = 7;
s |= b;
mc->mc_amp += (short)(adpcm_estimindex[(int)s] * dl);
estim += adpcm_estimstep[b];
if (estim < 0)
estim = 0;
else if (estim > 48)
estim = 48;
mc->mc_estim = estim;
return s;
}
void
msm6258_slinear16_host_to_adpcm(void *hdl, u_char *p, int cc)
{
struct msm6258_softc *sc = hdl;
struct msm6258_codecvar *mc = sc->sc_mc;
short *s = (short *)p;
int i;
u_char f;
for (i = 0; i < cc; i += 4) {
f = pcm2adpcm_step(mc, *s++);
f |= pcm2adpcm_step(mc, *s++) << 4;
*p++ = f;
}
}
void
msm6258_slinear16_le_to_adpcm(void *hdl, u_char *p, int cc)
{
#if BYTE_ORDER == BIG_ENDIAN
swap_bytes(hdl, p, cc);
#endif
msm6258_slinear16_host_to_adpcm(hdl, p, cc);
}
void
msm6258_slinear16_be_to_adpcm(void *hdl, u_char *p, int cc)
{
#if BYTE_ORDER == LITTLE_ENDIAN
swap_bytes(hdl, p, cc);
#endif
msm6258_slinear16_host_to_adpcm(hdl, p, cc);
}
void
msm6258_slinear8_to_adpcm(void *hdl, u_char *p, int cc)
{
struct msm6258_softc *sc = hdl;
struct msm6258_codecvar *mc = sc->sc_mc;
u_char *s = p;
int i;
u_char f;
for (i = 0; i < cc; i += 2) {
f = pcm2adpcm_step(mc, (short)(*s++) * 256);
f |= pcm2adpcm_step(mc, (short)(*s++) * 256) << 4;
*p++ = f;
}
}
void
msm6258_ulinear8_to_adpcm(void *hdl, u_char *p, int cc)
{
change_sign8(hdl, p, cc);
msm6258_slinear8_to_adpcm(hdl, p, cc);
}
void
msm6258_mulaw_to_adpcm(void *hdl, u_char *p, int cc)
{
mulaw_to_slinear8(hdl, p, cc);
msm6258_slinear8_to_adpcm(hdl, p, cc);
}
/*
* OkiADPCM -> signed 16bit linear PCM
*/
static inline short
adpcm2pcm_step(struct msm6258_codecvar *mc, u_char b)
{
int estim = (int)mc->mc_estim;
mc->mc_amp += adpcm_estim[estim] * adpcm_estimindex[b];
estim += adpcm_estimstep[b];
if (estim < 0)
estim = 0;
else if (estim > 48)
estim = 48;
mc->mc_estim = estim;
return mc->mc_amp;
}
void
msm6258_adpcm_to_slinear16_host(void *hdl, u_char *p, int cc)
{
struct msm6258_softc *sc = hdl;
struct msm6258_codecvar *mc = sc->sc_mc;
short *d = (short *)p;
int i;
u_char a;
/* XXX alignment ? */
memcpy(mc->mc_buf, p, cc / 4);
for (i = 0; i < cc / 4;) {
a = mc->mc_buf[i++];
*d++ = adpcm2pcm_step(mc, a & 0x0f);
*d++ = adpcm2pcm_step(mc, (a >> 4) & 0x0f);
}
}
void
msm6258_adpcm_to_slinear16_le(void *hdl, u_char *p, int cc)
{
msm6258_adpcm_to_slinear16_host(hdl, p, cc);
#if BYTE_ORDER == BIG_ENDIAN
swap_bytes(hdl, p, cc);
#endif
}
void
msm6258_adpcm_to_slinear16_be(void *hdl, u_char *p, int cc)
{
msm6258_adpcm_to_slinear16_host(hdl, p, cc);
#if BYTE_ORDER == LITTLE_ENDIAN
swap_bytes(hdl, p, cc);
#endif
}
void
msm6258_adpcm_to_slinear8(void *hdl, u_char *p, int cc)
{
struct msm6258_softc *sc = hdl;
struct msm6258_codecvar *mc = sc->sc_mc;
char *d = (char *)p;
int i;
u_char a;
/* cc may be even. XXX alignment ? */
memcpy(mc->mc_buf, p, cc / 2);
for (i = 0; i < cc / 2;) {
a = mc->mc_buf[i++];
*d++ = adpcm2pcm_step(mc, a & 0x0f) / 256;
*d++ = adpcm2pcm_step(mc, (a >> 4) & 0x0f) / 256;
}
}
void
msm6258_adpcm_to_ulinear8(void *hdl, u_char *p, int cc)
{
msm6258_adpcm_to_slinear8(hdl, p, cc);
change_sign8(hdl, p, cc);
}
void
msm6258_adpcm_to_mulaw(void *hdl, u_char *p, int cc)
{
msm6258_adpcm_to_slinear8(hdl, p, cc);
slinear8_to_mulaw(hdl, p, cc);
}