/* $NetBSD: aucc.c,v 1.48 2020/02/29 06:03:55 isaki Exp $ */
/*
* Copyright (c) 1999 Bernardo Innocenti
* All rights reserved.
*
* Copyright (c) 1997 Stephan Thesing
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Stephan Thesing.
* 4. 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.
*/
/* TODO:
*
* - channel allocation is wrong for 14bit mono
* - perhaps use a calibration table for better 14bit output
* - set 31 kHz AGA video mode to allow 44.1 kHz even if grfcc is missing
* in the kernel
* - 14bit output requires maximum volume
*/
#include "aucc.h"
#if NAUCC > 0
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: aucc.c,v 1.48 2020/02/29 06:03:55 isaki Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <machine/cpu.h>
#include <sys/audioio.h>
#include <dev/audio/audio_if.h>
#include <dev/audio/audiovar.h> /* for AUDIO_MIN_FREQUENCY */
#include <amiga/amiga/cc.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/device.h>
#include <amiga/dev/auccvar.h>
#include "opt_lev6_defer.h"
#ifdef LEV6_DEFER
#define AUCC_MAXINT 3
#define AUCC_ALLINTF (INTF_AUD0|INTF_AUD1|INTF_AUD2)
#else
#define AUCC_MAXINT 4
#define AUCC_ALLINTF (INTF_AUD0|INTF_AUD1|INTF_AUD2|INTF_AUD3)
#endif
/* this unconditionally; we may use AUD3 as slave channel with LEV6_DEFER */
#define AUCC_ALLDMAF (DMAF_AUD0|DMAF_AUD1|DMAF_AUD2|DMAF_AUD3)
#ifdef AUDIO_DEBUG
/*extern printf(const char *,...);*/
int auccdebug = 1;
#define DPRINTF(x) if (auccdebug) printf x
#else
#define DPRINTF(x)
#endif
/* clock frequency.. */
extern int eclockfreq;
/* hw audio ch */
extern struct audio_channel channel[4];
/*
* Software state.
*/
struct aucc_softc {
aucc_data_t sc_channel[4]; /* per channel freq, ... */
u_int sc_encoding; /* encoding AUDIO_ENCODING_.*/
int sc_channels; /* # of channels used */
int sc_precision; /* 8 or 16 bits */
int sc_14bit; /* 14bit output enabled */
int sc_intrcnt; /* interrupt count */
int sc_channelmask; /* which channels are used ? */
void (*sc_decodefunc)(u_char **, u_char *, int);
/* pointer to format conversion routine */
kmutex_t sc_lock;
kmutex_t sc_intr_lock;
};
/* interrupt interfaces */
void aucc_inthdl(int);
/* forward declarations */
static int init_aucc(struct aucc_softc *);
static u_int freqtoper(u_int);
static u_int pertofreq(u_int);
/* autoconfiguration driver */
void auccattach(device_t, device_t, void *);
int auccmatch(device_t, cfdata_t, void *);
CFATTACH_DECL_NEW(aucc, sizeof(struct aucc_softc),
auccmatch, auccattach, NULL, NULL);
struct audio_device aucc_device = {
"Amiga-audio",
"2.0",
"aucc"
};
struct aucc_softc *aucc = NULL;
/*
* Define our interface to the higher level audio driver.
*/
int aucc_open(void *, int);
void aucc_close(void *);
int aucc_set_out_sr(void *, u_int);
int aucc_query_format(void *, audio_format_query_t *);
int aucc_round_blocksize(void *, int, int, const audio_params_t *);
int aucc_commit_settings(void *);
int aucc_start_output(void *, void *, int, void (*)(void *), void *);
int aucc_start_input(void *, void *, int, void (*)(void *), void *);
int aucc_halt_output(void *);
int aucc_halt_input(void *);
int aucc_getdev(void *, struct audio_device *);
int aucc_set_port(void *, mixer_ctrl_t *);
int aucc_get_port(void *, mixer_ctrl_t *);
int aucc_query_devinfo(void *, mixer_devinfo_t *);
void aucc_encode(int, int, int, int, u_char *, u_short **);
int aucc_set_format(void *, int,
const audio_params_t *, const audio_params_t *,
audio_filter_reg_t *, audio_filter_reg_t *);
int aucc_get_props(void *);
void aucc_get_locks(void *, kmutex_t **, kmutex_t **);
static void aucc_decode_slinear16_1ch(u_char **, u_char *, int);
static void aucc_decode_slinear16_2ch(u_char **, u_char *, int);
static void aucc_decode_slinear16_3ch(u_char **, u_char *, int);
static void aucc_decode_slinear16_4ch(u_char **, u_char *, int);
const struct audio_hw_if sa_hw_if = {
.open = aucc_open,
.close = aucc_close,
.query_format = aucc_query_format,
.set_format = aucc_set_format,
.round_blocksize = aucc_round_blocksize,
.commit_settings = aucc_commit_settings,
.start_output = aucc_start_output,
.start_input = aucc_start_input,
.halt_output = aucc_halt_output,
.halt_input = aucc_halt_input,
.getdev = aucc_getdev,
.set_port = aucc_set_port,
.get_port = aucc_get_port,
.query_devinfo = aucc_query_devinfo,
.get_props = aucc_get_props,
.get_locks = aucc_get_locks,
};
/*
* XXX *1 How lower limit of frequency should be? same as audio(4)?
* XXX *2 Should avoid a magic number at the upper limit of frequency.
* XXX *3 In fact, there is a number in this range that have minimal errors.
* It would be better if there is a mechanism which such frequency
* is prioritized.
* XXX *4 3/4ch modes use 8bits, 1/2ch modes use 14bits,
* so I imagined that 1/2ch modes are better.
*/
#define AUCC_FORMAT(prio, ch, chmask) \
{ \
.mode = AUMODE_PLAY, \
.priority = (prio), \
.encoding = AUDIO_ENCODING_SLINEAR_BE, \
.validbits = 16, \
.precision = 16, \
.channels = (ch), \
.channel_mask = (chmask), \
.frequency_type = 0, \
.frequency = { AUDIO_MIN_FREQUENCY, 28867 }, \
}
static const struct audio_format aucc_formats[] = {
AUCC_FORMAT(1, 1, AUFMT_MONAURAL),
AUCC_FORMAT(1, 2, AUFMT_STEREO),
AUCC_FORMAT(0, 3, AUFMT_UNKNOWN_POSITION),
AUCC_FORMAT(0, 4, AUFMT_UNKNOWN_POSITION),
};
#define AUCC_NFORMATS __arraycount(aucc_formats)
/* autoconfig routines */
int
auccmatch(device_t parent, cfdata_t cf, void *aux)
{
static int aucc_matched = 0;
if (!matchname((char *)aux, "aucc") ||
#ifdef DRACO
is_draco() ||
#endif
aucc_matched)
return 0;
aucc_matched = 1;
return 1;
}
/*
* Audio chip found.
*/
void
auccattach(device_t parent, device_t self, void *args)
{
struct aucc_softc *sc;
int i;
sc = device_private(self);
printf("\n");
if ((i=init_aucc(sc))) {
printf("audio: no chipmem\n");
return;
}
audio_attach_mi(&sa_hw_if, sc, self);
}
static int
init_aucc(struct aucc_softc *sc)
{
int i, err;
err = 0;
/* init values per channel */
for (i = 0; i < 4; i++) {
sc->sc_channel[i].nd_freq = 8000;
sc->sc_channel[i].nd_per = freqtoper(8000);
sc->sc_channel[i].nd_busy = 0;
sc->sc_channel[i].nd_dma = alloc_chipmem(AUDIO_BUF_SIZE*2);
if (sc->sc_channel[i].nd_dma == NULL)
err = 1;
sc->sc_channel[i].nd_dmalength = 0;
sc->sc_channel[i].nd_volume = 64;
sc->sc_channel[i].nd_intr = NULL;
sc->sc_channel[i].nd_intrdata = NULL;
sc->sc_channel[i].nd_doublebuf = 0;
DPRINTF(("DMA buffer for channel %d is %p\n", i,
sc->sc_channel[i].nd_dma));
}
if (err) {
for (i = 0; i < 4; i++)
if (sc->sc_channel[i].nd_dma)
free_chipmem(sc->sc_channel[i].nd_dma);
}
sc->sc_channels = 1;
sc->sc_channelmask = 0xf;
sc->sc_precision = 16;
sc->sc_14bit = 1;
sc->sc_encoding = AUDIO_ENCODING_SLINEAR_BE;
sc->sc_decodefunc = aucc_decode_slinear16_2ch;
/* clear interrupts and DMA: */
custom.intena = AUCC_ALLINTF;
custom.dmacon = AUCC_ALLDMAF;
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_SCHED);
return err;
}
int
aucc_open(void *addr, int flags)
{
struct aucc_softc *sc;
int i;
sc = addr;
DPRINTF(("sa_open: unit %p\n",sc));
for (i = 0; i < AUCC_MAXINT; i++) {
sc->sc_channel[i].nd_intr = NULL;
sc->sc_channel[i].nd_intrdata = NULL;
}
aucc = sc;
sc->sc_channelmask = 0xf;
DPRINTF(("saopen: ok -> sc=%p\n",sc));
return 0;
}
void
aucc_close(void *addr)
{
DPRINTF(("sa_close: closed.\n"));
}
int
aucc_set_out_sr(void *addr, u_int sr)
{
struct aucc_softc *sc;
u_long per;
int i;
sc = addr;
per = freqtoper(sr);
if (per > 0xffff)
return EINVAL;
sr = pertofreq(per);
for (i = 0; i < 4; i++) {
sc->sc_channel[i].nd_freq = sr;
sc->sc_channel[i].nd_per = per;
}
return 0;
}
int
aucc_query_format(void *addr, audio_format_query_t *afp)
{
return audio_query_format(aucc_formats, AUCC_NFORMATS, afp);
}
int
aucc_set_format(void *addr, int setmode,
const audio_params_t *p, const audio_params_t *r,
audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
struct aucc_softc *sc;
sc = addr;
KASSERT((setmode & AUMODE_RECORD) == 0);
#ifdef AUCCDEBUG
printf("%s(setmode 0x%x,"
"enc %u bits %u, chn %u, sr %u)\n", setmode,
p->encoding, p->precision, p->channels, p->sample_rate);
#endif
switch (p->channels) {
case 1:
sc->sc_decodefunc = aucc_decode_slinear16_1ch;
break;
case 2:
sc->sc_decodefunc = aucc_decode_slinear16_2ch;
break;
case 3:
sc->sc_decodefunc = aucc_decode_slinear16_3ch;
break;
case 4:
sc->sc_decodefunc = aucc_decode_slinear16_4ch;
break;
default:
return EINVAL;
}
sc->sc_encoding = p->encoding;
sc->sc_precision = p->precision;
sc->sc_14bit = ((p->precision == 16) && (p->channels <= 2));
sc->sc_channels = sc->sc_14bit ? (p->channels * 2) : p->channels;
return aucc_set_out_sr(addr, p->sample_rate);
}
int
aucc_round_blocksize(void *addr, int blk,
int mode, const audio_params_t *param)
{
if (blk > AUDIO_BUF_SIZE)
blk = AUDIO_BUF_SIZE;
blk = rounddown(blk, param->channels * param->precision / NBBY);
return blk;
}
int
aucc_commit_settings(void *addr)
{
struct aucc_softc *sc;
int i;
DPRINTF(("sa_commit.\n"));
sc = addr;
for (i = 0; i < 4; i++) {
custom.aud[i].vol = sc->sc_channel[i].nd_volume;
custom.aud[i].per = sc->sc_channel[i].nd_per;
}
DPRINTF(("commit done\n"));
return 0;
}
static int masks[4] = {1,3,7,15}; /* masks for n first channels */
static int masks2[4] = {1,2,4,8};
int
aucc_start_output(void *addr, void *p, int cc, void (*intr)(void *), void *arg)
{
struct aucc_softc *sc;
int mask;
int i, j, k, len;
u_char *dmap[4];
sc = addr;
mask = sc->sc_channelmask;
dmap[0] = dmap[1] = dmap[2] = dmap[3] = NULL;
DPRINTF(("sa_start_output: cc=%d %p (%p)\n", cc, intr, arg));
if (sc->sc_channels > 1)
mask &= masks[sc->sc_channels - 1];
/* we use first sc_channels channels */
if (mask == 0) /* active and used channels are disjoint */
return EINVAL;
for (i = 0; i < 4; i++) {
/* channels available ? */
if ((masks2[i] & mask) && (sc->sc_channel[i].nd_busy))
return EBUSY; /* channel is busy */
if (channel[i].isaudio == -1)
return EBUSY; /* system uses them */
}
/* enable interrupt on 1st channel */
for (i = j = 0; i < AUCC_MAXINT; i++) {
if (masks2[i] & mask) {
DPRINTF(("first channel is %d\n",i));
j = i;
sc->sc_channel[i].nd_intr = intr;
sc->sc_channel[i].nd_intrdata = arg;
break;
}
}
DPRINTF(("dmap is %p %p %p %p, mask=0x%x\n", dmap[0], dmap[1],
dmap[2], dmap[3], mask));
/* disable ints, DMA for channels, until all parameters set */
/* XXX dont disable DMA! custom.dmacon=mask;*/
custom.intreq = mask << INTB_AUD0;
custom.intena = mask << INTB_AUD0;
/* copy data to DMA buffer */
if (sc->sc_channels == 1) {
dmap[0] =
dmap[1] =
dmap[2] =
dmap[3] = (u_char *)sc->sc_channel[j].nd_dma;
} else {
for (k = 0; k < 4; k++) {
if (masks2[k+j] & mask)
dmap[k] = (u_char *)sc->sc_channel[k+j].nd_dma;
}
}
sc->sc_channel[j].nd_doublebuf ^= 1;
if (sc->sc_channel[j].nd_doublebuf) {
dmap[0] += AUDIO_BUF_SIZE;
dmap[1] += AUDIO_BUF_SIZE;
dmap[2] += AUDIO_BUF_SIZE;
dmap[3] += AUDIO_BUF_SIZE;
}
/*
* compute output length in bytes per channel.
* divide by two only for 16bit->8bit conversion.
*/
len = cc / sc->sc_channels;
if (!sc->sc_14bit && (sc->sc_precision == 16))
len /= 2;
/* call audio decoding routine */
sc->sc_decodefunc (dmap, (u_char *)p, len);
/* DMA buffers: we use same buffer 4 all channels
* write DMA location and length
*/
for (i = k = 0; i < 4; i++) {
if (masks2[i] & mask) {
DPRINTF(("turning channel %d on\n",i));
/* sc->sc_channel[i].nd_busy=1; */
channel[i].isaudio = 1;
channel[i].play_count = 1;
channel[i].handler = NULL;
custom.aud[i].per = sc->sc_channel[i].nd_per;
if (sc->sc_14bit && (i > 1))
custom.aud[i].vol = 1;
else
custom.aud[i].vol = sc->sc_channel[i].nd_volume;
custom.aud[i].lc = PREP_DMA_MEM(dmap[k++]);
custom.aud[i].len = len / 2;
sc->sc_channel[i].nd_mask = mask;
DPRINTF(("per is %d, vol is %d, len is %d\n",\
sc->sc_channel[i].nd_per,
sc->sc_channel[i].nd_volume, len));
}
}
channel[j].handler = aucc_inthdl;
/* enable ints */
custom.intena = INTF_SETCLR | INTF_INTEN | (masks2[j] << INTB_AUD0);
DPRINTF(("enabled ints: 0x%x\n", (masks2[j] << INTB_AUD0)));
/* enable DMA */
custom.dmacon = DMAF_SETCLR | DMAF_MASTER | mask;
DPRINTF(("enabled DMA, mask=0x%x\n",mask));
return 0;
}
/* ARGSUSED */
int
aucc_start_input(void *addr, void *p, int cc, void (*intr)(void *), void *arg)
{
return ENXIO; /* no input */
}
int
aucc_halt_output(void *addr)
{
struct aucc_softc *sc;
int i;
/* XXX only halt, if input is also halted ?? */
sc = addr;
/* stop DMA, etc */
custom.intena = AUCC_ALLINTF;
custom.dmacon = AUCC_ALLDMAF;
/* mark every busy unit idle */
for (i = 0; i < 4; i++) {
sc->sc_channel[i].nd_busy = sc->sc_channel[i].nd_mask = 0;
channel[i].isaudio = 0;
channel[i].play_count = 0;
}
return 0;
}
int
aucc_halt_input(void *addr)
{
/* no input */
return ENXIO;
}
int
aucc_getdev(void *addr, struct audio_device *retp)
{
*retp = aucc_device;
return 0;
}
int
aucc_set_port(void *addr, mixer_ctrl_t *cp)
{
struct aucc_softc *sc;
int i,j;
DPRINTF(("aucc_set_port: port=%d", cp->dev));
sc = addr;
switch (cp->type) {
case AUDIO_MIXER_SET:
if (cp->dev != AUCC_CHANNELS)
return EINVAL;
i = cp->un.mask;
if ((i < 1) || (i > 15))
return EINVAL;
sc->sc_channelmask = i;
break;
case AUDIO_MIXER_VALUE:
i = cp->un.value.num_channels;
if ((i < 1) || (i > 4))
return EINVAL;
#ifdef __XXXwhatsthat
if (cp->dev != AUCC_VOLUME)
return EINVAL;
#endif
/* set volume for channel 0..i-1 */
/* evil workaround for xanim bug, IMO */
if ((sc->sc_channels == 1) && (i == 2)) {
sc->sc_channel[0].nd_volume =
sc->sc_channel[3].nd_volume =
cp->un.value.level[0] >> 2;
sc->sc_channel[1].nd_volume =
sc->sc_channel[2].nd_volume =
cp->un.value.level[1] >> 2;
} else if (i > 1) {
for (j = 0; j < i; j++)
sc->sc_channel[j].nd_volume =
cp->un.value.level[j] >> 2;
} else if (sc->sc_channels > 1)
for (j = 0; j < sc->sc_channels; j++)
sc->sc_channel[j].nd_volume =
cp->un.value.level[0] >> 2;
else
for (j = 0; j < 4; j++)
sc->sc_channel[j].nd_volume =
cp->un.value.level[0] >> 2;
break;
default:
return EINVAL;
break;
}
return 0;
}
int
aucc_get_port(void *addr, mixer_ctrl_t *cp)
{
struct aucc_softc *sc;
int i,j;
DPRINTF(("aucc_get_port: port=%d", cp->dev));
sc = addr;
switch (cp->type) {
case AUDIO_MIXER_SET:
if (cp->dev != AUCC_CHANNELS)
return EINVAL;
cp->un.mask = sc->sc_channelmask;
break;
case AUDIO_MIXER_VALUE:
i = cp->un.value.num_channels;
if ((i < 1) || (i > 4))
return EINVAL;
for (j = 0; j < i; j++)
cp->un.value.level[j] =
(sc->sc_channel[j].nd_volume << 2) +
(sc->sc_channel[j].nd_volume >> 4);
break;
default:
return EINVAL;
}
return 0;
}
int
aucc_get_props(void *addr)
{
return AUDIO_PROP_PLAYBACK;
}
void
aucc_get_locks(void *opaque, kmutex_t **intr, kmutex_t **thread)
{
struct aucc_softc *sc = opaque;
*intr = &sc->sc_intr_lock;
*thread = &sc->sc_lock;
}
int
aucc_query_devinfo(void *addr, register mixer_devinfo_t *dip)
{
int i;
switch(dip->index) {
case AUCC_CHANNELS:
dip->type = AUDIO_MIXER_SET;
dip->mixer_class = AUCC_OUTPUT_CLASS;
dip->prev = dip->next = AUDIO_MIXER_LAST;
#define setname(a) strlcpy(dip->label.name, (a), sizeof(dip->label.name))
setname(AudioNspeaker);
for (i = 0; i < 16; i++) {
snprintf(dip->un.s.member[i].label.name,
sizeof(dip->un.s.member[i].label.name),
"channelmask%d", i);
dip->un.s.member[i].mask = i;
}
dip->un.s.num_mem = 16;
break;
case AUCC_VOLUME:
dip->type = AUDIO_MIXER_VALUE;
dip->mixer_class = AUCC_OUTPUT_CLASS;
dip->prev = dip->next = AUDIO_MIXER_LAST;
setname(AudioNmaster);
dip->un.v.num_channels = 4;
strcpy(dip->un.v.units.name, AudioNvolume);
break;
case AUCC_OUTPUT_CLASS:
dip->type = AUDIO_MIXER_CLASS;
dip->mixer_class = AUCC_OUTPUT_CLASS;
dip->next = dip->prev = AUDIO_MIXER_LAST;
setname(AudioCoutputs);
break;
default:
return ENXIO;
}
DPRINTF(("AUDIO_MIXER_DEVINFO: name=%s\n", dip->label.name));
return 0;
}
/* audio int handler */
void
aucc_inthdl(int ch)
{
int i;
int mask;
mutex_spin_enter(&aucc->sc_intr_lock);
mask = aucc->sc_channel[ch].nd_mask;
/*
* for all channels in this maskgroup:
* disable DMA, int
* mark idle
*/
DPRINTF(("inthandler called, channel %d, mask 0x%x\n", ch, mask));
custom.intreq = mask << INTB_AUD0; /* clear request */
/*
* XXX: maybe we can leave ints and/or DMA on,
* if another sample has to be played?
*/
custom.intena = mask << INTB_AUD0;
/*
* XXX custom.dmacon=mask; NO!!!
*/
for (i = 0; i < 4; i++) {
if (masks2[i] && mask) {
DPRINTF(("marking channel %d idle\n",i));
aucc->sc_channel[i].nd_busy = 0;
aucc->sc_channel[i].nd_mask = 0;
channel[i].isaudio = channel[i].play_count = 0;
}
}
/* call handler */
if (aucc->sc_channel[ch].nd_intr) {
DPRINTF(("calling %p\n",aucc->sc_channel[ch].nd_intr));
(*(aucc->sc_channel[ch].nd_intr))
(aucc->sc_channel[ch].nd_intrdata);
} else
DPRINTF(("zero int handler\n"));
mutex_spin_exit(&aucc->sc_intr_lock);
DPRINTF(("ints done\n"));
}
/* transform frequency to period, adjust bounds */
static u_int
freqtoper(u_int freq)
{
u_int per;
per = eclockfreq * 5 / freq;
if (per < 124)
per = 124; /* must have at least 124 ticks between samples */
return per;
}
/* transform period to frequency */
static u_int
pertofreq(u_int per)
{
return eclockfreq * 5 / per;
}
/* 14bit output */
static void
aucc_decode_slinear16_1ch(u_char **dmap, u_char *p, int i)
{
u_char *ch0;
u_char *ch3;
ch0 = dmap[0];
ch3 = dmap[1]; /* XXX should be 3 */
while (i--) {
*ch0++ = *p++;
*ch3++ = *p++ >> 2;
}
}
/* 14bit stereo output */
static void
aucc_decode_slinear16_2ch(u_char **dmap, u_char *p, int i)
{
u_char *ch0;
u_char *ch1;
u_char *ch2;
u_char *ch3;
ch0 = dmap[0];
ch1 = dmap[1];
ch2 = dmap[2];
ch3 = dmap[3];
while (i--) {
*ch0++ = *p++;
*ch3++ = *p++ >> 2;
*ch1++ = *p++;
*ch2++ = *p++ >> 2;
}
}
static void
aucc_decode_slinear16_3ch(u_char **dmap, u_char *p, int i)
{
u_char *ch0;
u_char *ch1;
u_char *ch2;
ch0 = dmap[0];
ch1 = dmap[1];
ch2 = dmap[2];
while (i--) {
*ch0++ = *p++; p++;
*ch1++ = *p++; p++;
*ch2++ = *p++; p++;
}
}
static void
aucc_decode_slinear16_4ch(u_char **dmap, u_char *p, int i)
{
u_char *ch0;
u_char *ch1;
u_char *ch2;
u_char *ch3;
ch0 = dmap[0];
ch1 = dmap[1];
ch2 = dmap[2];
ch3 = dmap[3];
while (i--) {
*ch0++ = *p++; p++;
*ch1++ = *p++; p++;
*ch2++ = *p++; p++;
*ch3++ = *p++; p++;
}
}
#endif /* NAUCC > 0 */
