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Code Issues Releases Activity

prepare for adding a rate conversion feeder.

Browse Source 
move format conversion feeders to feeder_fmt.c - no pertinent history so no
repo-copy.
This commit is contained in:
Cameron Grant 2000-09-23 22:11:32 +00:00
parent 33c878f034
commit c9c6ba09e4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=66308
5 changed files with 728 additions and 445 deletions
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148
sys/dev/sound/pcm/channel.c
View File

@ -44,6 +44,7 @@ static void chn_dmaupdate(pcm_channel *c);
static void chn_wrintr(pcm_channel *c);
static void chn_rdintr(pcm_channel *c);
static u_int32_t chn_start(pcm_channel *c);
static int chn_buildfeeder(pcm_channel *c);
/*
* SOUND OUTPUT
@ -307,14 +308,16 @@ static int
chn_wrfeed2nd(pcm_channel *c, struct uio *buf)
{
snd_dbuf *bs = &c->buffer2nd;
int l, w, wacc;
int l, w, wacc, hl;
u_int8_t hackbuf[64];
/* The DMA buffer may have some space. */
while (chn_wrfeed(c) > 0);
/* ensure we always have a whole number of samples */
wacc = 0;
while (buf->uio_resid > 0 && bs->fl > 0) {
hl = 0;
while (buf->uio_resid > 0 && bs->fl > 64) {
/*
* The size of the data to move here does not have to be
* aligned. We take care of it upon moving the data to a
@ -322,7 +325,14 @@ chn_wrfeed2nd(pcm_channel *c, struct uio *buf)
*/
l = min(bs->fl, bs->bufsize - bs->fp);
/* Move the samples, update the markers and pointers. */
w = c->feeder->feed(c->feeder, c, bs->buf + bs->fp, l, buf);
if (l < 64) {
w = c->feeder->feed(c->feeder, c, hackbuf, 64, buf);
l = min(w, bs->bufsize - bs->fp);
bcopy(hackbuf, bs->buf + bs->fp, l);
if (w > l)
bcopy(hackbuf + l, bs->buf, w - l);
} else
w = c->feeder->feed(c->feeder, c, bs->buf + bs->fp, l, buf);
if (w == 0)
panic("no feed");
bs->rl += w;
@ -1093,6 +1103,18 @@ chn_flush(pcm_channel *c)
return 0;
}
int
fmtvalid(u_int32_t fmt, u_int32_t *fmtlist)
{
int i;
for (i = 0; fmtlist[i]; i++)
if (fmt == fmtlist[i])
return 1;
return 0;
}
int
chn_reset(pcm_channel *c, u_int32_t fmt)
{
@ -1104,6 +1126,7 @@ chn_reset(pcm_channel *c, u_int32_t fmt)
if (r)
return r;
if (fmt) {
c->speed = DSP_DEFAULT_SPEED;
r = chn_setformat(c, fmt);
if (r == 0)
r = chn_setspeed(c, DSP_DEFAULT_SPEED);
@ -1146,6 +1169,7 @@ chn_init(pcm_channel *c, void *devinfo, int dir)
c->feeder->source = NULL;
c->flags = 0;
c->feederflags = 0;
c->buffer.chan = -1;
c->devinfo = c->init(devinfo, &c->buffer, c, dir);
if (c->devinfo == NULL || c->buffer.bufsize == 0)
@ -1202,11 +1226,45 @@ chn_setvolume(pcm_channel *c, int left, int right)
int
chn_setspeed(pcm_channel *c, int speed)
{
pcm_feeder *f;
int r, hwspd, delta;
DEB(printf("want speed %d, ", speed));
if (speed <= 0)
return EINVAL;
/* could add a feeder for rate conversion */
if (CANCHANGE(c)) {
c->speed = c->setspeed(c->devinfo, speed);
c->speed = speed;
hwspd = speed;
RANGE(hwspd, chn_getcaps(c)->minspeed, chn_getcaps(c)->maxspeed);
DEB(printf("try speed %d, ", hwspd));
hwspd = c->setspeed(c->devinfo, hwspd);
DEB(printf("got speed %d, ", hwspd));
delta = hwspd - speed;
if (delta < 0)
delta = -delta;
c->feederflags &= ~(1 << FEEDER_RATE);
if (delta > 500)
c->feederflags |= 1 << FEEDER_RATE;
else
speed = hwspd;
r = chn_buildfeeder(c);
DEB(printf("r = %d\n", r));
if (r)
return r;
if (!(c->feederflags & (1 << FEEDER_RATE)))
return 0;
f = chn_findfeeder(c, FEEDER_RATE);
DEB(printf("feedrate = %p\n", f));
if (f == NULL)
return EINVAL;
r = feeder_set(f, FEEDRATE_SRC, speed);
DEB(printf("feeder_set(FEEDRATE_SRC, %d) = %d\n", speed, r));
if (r)
return r;
r = feeder_set(f, FEEDRATE_DST, hwspd);
DEB(printf("feeder_set(FEEDRATE_DST, %d) = %d\n", hwspd, r));
if (r)
return r;
return 0;
}
c->speed = speed;
@ -1214,42 +1272,31 @@ chn_setspeed(pcm_channel *c, int speed)
return 0;
}
int
fmtvalid(u_int32_t fmt, u_int32_t *fmtlist)
{
int i;
for (i = 0; fmtlist[i]; i++)
if (fmt == fmtlist[i])
return 1;
return 0;
}
int
chn_setformat(pcm_channel *c, u_int32_t fmt)
{
snd_dbuf *b = &c->buffer;
snd_dbuf *bs = &c->buffer2nd;
int r;
u_int32_t hwfmt;
if (CANCHANGE(c)) {
while (chn_removefeeder(c) == 0);
DEB(printf("want format %d\n", fmt));
c->format = fmt;
c->feederdesc->out = c->format;
hwfmt = c->format;
if (!fmtvalid(hwfmt, chn_getcaps(c)->fmtlist)) {
if (c->flags & CHN_F_MAPPED)
return EINVAL;
hwfmt = chn_feedchain(c, chn_getcaps(c)->fmtlist);
if (hwfmt == 0)
return EINVAL;
}
c->feederflags &= ~(1 << FEEDER_FMT);
if (!fmtvalid(hwfmt, chn_getcaps(c)->fmtlist))
c->feederflags |= 1 << FEEDER_FMT;
r = chn_buildfeeder(c);
if (r)
return r;
hwfmt = c->feeder->desc->out;
b->fmt = hwfmt;
bs->fmt = hwfmt;
chn_resetbuf(c);
c->setformat(c->devinfo, hwfmt);
return 0;
return chn_setspeed(c, c->speed);
}
c->format = fmt;
c->flags |= CHN_F_INIT;
@ -1354,4 +1401,53 @@ chn_getformats(pcm_channel *c)
return fmts;
}
static int
chn_buildfeeder(pcm_channel *c)
{
pcm_feeder *f;
struct pcm_feederdesc desc;
u_int32_t tmp[2], src, dst, type, flags;
while (chn_removefeeder(c) == 0);
c->align = 0;
flags = c->feederflags;
src = c->feeder->desc->out;
if ((c->flags & CHN_F_MAPPED) && (flags != 0))
return EINVAL;
DEB(printf("not mapped, flags %x, ", flags));
for (type = FEEDER_RATE; type <= FEEDER_LAST; type++) {
if (flags & (1 << type)) {
desc.type = type;
desc.in = 0;
desc.out = 0;
desc.flags = 0;
DEB(printf("find feeder type %d, ", type));
f = feeder_get(&desc);
DEB(printf("got %p\n", f));
if (f == NULL)
return EINVAL;
dst = f->desc->in;
if (src != dst) {
DEB(printf("build fmtchain from %x to %x: ", src, dst));
tmp[0] = dst;
tmp[1] = 0;
if (chn_fmtchain(c, tmp) == 0)
return EINVAL;
DEB(printf("ok\n"));
}
if (chn_addfeeder(c, f))
return EINVAL;
src = f->desc->out;
DEB(printf("added feeder %p, output %x\n", f, src));
dst = 0;
flags &= ~(1 << type);
}
}
if (!fmtvalid(src, chn_getcaps(c)->fmtlist)) {
if (chn_fmtchain(c, chn_getcaps(c)->fmtlist) == 0)
return EINVAL;
DEB(printf("built fmtchain from %x to %x\n", src, c->feeder->desc->out));
flags &= ~(1 << FEEDER_FMT);
}
return 0;
}

12
sys/dev/sound/pcm/datatypes.h
View File

@ -81,11 +81,7 @@ typedef int (pcmfeed_init_t)(pcm_feeder *feeder);
typedef int (pcmfeed_free_t)(pcm_feeder *feeder);
typedef int (pcmfeed_feed_t)(pcm_feeder *feeder, pcm_channel *c, u_int8_t *buffer,
u_int32_t count, struct uio *stream);
#define FEEDER_ROOT 1
#define FEEDER_FMT 2
#define FEEDER_RATE 3
#define FEEDER_FILTER 4
typedef int (pcmfeed_set_t)(pcm_feeder *feeder, int what, int value);
struct pcm_feederdesc {
u_int32_t type;
@ -94,14 +90,13 @@ struct pcm_feederdesc {
int idx;
};
#define MAXFEEDERS 256
struct _pcm_feeder {
char name[16];
int align;
struct pcm_feederdesc *desc;
pcmfeed_init_t *init;
pcmfeed_free_t *free;
pcmfeed_set_t *set;
pcmfeed_feed_t *feed;
void *data;
pcm_feeder *source;
@ -147,8 +142,9 @@ struct _pcm_channel {
int volume;
u_int32_t speed;
u_int32_t flags;
u_int32_t format;
u_int32_t flags;
u_int32_t feederflags;
u_int32_t blocks;
int direction;

500
sys/dev/sound/pcm/feeder.c
View File

@ -28,79 +28,9 @@
#include <dev/sound/pcm/sound.h>
#define FEEDBUFSZ 8192
#define MAXFEEDERS 256
#undef FEEDER_DEBUG
static unsigned char ulaw_to_u8[] = {
3, 7, 11, 15, 19, 23, 27, 31,
35, 39, 43, 47, 51, 55, 59, 63,
66, 68, 70, 72, 74, 76, 78, 80,
82, 84, 86, 88, 90, 92, 94, 96,
98, 99, 100, 101, 102, 103, 104, 105,
106, 107, 108, 109, 110, 111, 112, 113,
113, 114, 114, 115, 115, 116, 116, 117,
117, 118, 118, 119, 119, 120, 120, 121,
121, 121, 122, 122, 122, 122, 123, 123,
123, 123, 124, 124, 124, 124, 125, 125,
125, 125, 125, 125, 126, 126, 126, 126,
126, 126, 126, 126, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
253, 249, 245, 241, 237, 233, 229, 225,
221, 217, 213, 209, 205, 201, 197, 193,
190, 188, 186, 184, 182, 180, 178, 176,
174, 172, 170, 168, 166, 164, 162, 160,
158, 157, 156, 155, 154, 153, 152, 151,
150, 149, 148, 147, 146, 145, 144, 143,
143, 142, 142, 141, 141, 140, 140, 139,
139, 138, 138, 137, 137, 136, 136, 135,
135, 135, 134, 134, 134, 134, 133, 133,
133, 133, 132, 132, 132, 132, 131, 131,
131, 131, 131, 131, 130, 130, 130, 130,
130, 130, 130, 130, 129, 129, 129, 129,
129, 129, 129, 129, 129, 129, 129, 129,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
};
static unsigned char u8_to_ulaw[] = {
0, 0, 0, 0, 0, 1, 1, 1,
1, 2, 2, 2, 2, 3, 3, 3,
3, 4, 4, 4, 4, 5, 5, 5,
5, 6, 6, 6, 6, 7, 7, 7,
7, 8, 8, 8, 8, 9, 9, 9,
9, 10, 10, 10, 10, 11, 11, 11,
11, 12, 12, 12, 12, 13, 13, 13,
13, 14, 14, 14, 14, 15, 15, 15,
15, 16, 16, 17, 17, 18, 18, 19,
19, 20, 20, 21, 21, 22, 22, 23,
23, 24, 24, 25, 25, 26, 26, 27,
27, 28, 28, 29, 29, 30, 30, 31,
31, 32, 33, 34, 35, 36, 37, 38,
39, 40, 41, 42, 43, 44, 45, 46,
47, 49, 51, 53, 55, 57, 59, 61,
63, 66, 70, 74, 78, 84, 92, 104,
254, 231, 219, 211, 205, 201, 197, 193,
190, 188, 186, 184, 182, 180, 178, 176,
175, 174, 173, 172, 171, 170, 169, 168,
167, 166, 165, 164, 163, 162, 161, 160,
159, 159, 158, 158, 157, 157, 156, 156,
155, 155, 154, 154, 153, 153, 152, 152,
151, 151, 150, 150, 149, 149, 148, 148,
147, 147, 146, 146, 145, 145, 144, 144,
143, 143, 143, 143, 142, 142, 142, 142,
141, 141, 141, 141, 140, 140, 140, 140,
139, 139, 139, 139, 138, 138, 138, 138,
137, 137, 137, 137, 136, 136, 136, 136,
135, 135, 135, 135, 134, 134, 134, 134,
133, 133, 133, 133, 132, 132, 132, 132,
131, 131, 131, 131, 130, 130, 130, 130,
129, 129, 129, 129, 128, 128, 128, 128,
};
struct feedertab_entry {
SLIST_ENTRY(feedertab_entry) link;
pcm_feeder *feeder;
@ -149,347 +79,13 @@ feeder_register(void *p)
printf("MAXFEEDERS exceeded\n");
}
/*****************************************************************************/
static int
feed_root(pcm_feeder *feeder, pcm_channel *ch, u_int8_t *buffer, u_int32_t count, struct uio *stream)
{
int ret, s;
KASSERT(count, ("feed_root: count == 0"));
count &= ~((1 << ch->align) - 1);
KASSERT(count, ("feed_root: aligned count == 0"));
s = spltty();
count = min(count, stream->uio_resid);
if (count) {
ret = uiomove(buffer, count, stream);
KASSERT(ret == 0, ("feed_root: uiomove failed"));
}
splx(s);
return count;
}
static pcm_feeder feeder_root = { "root", 0, NULL, NULL, NULL, feed_root };
SYSINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_register, &feeder_root);
/*****************************************************************************/
static int
feed_8to16le(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k;
k = f->source->feed(f->source, c, b, count / 2, stream);
j = k - 1;
i = j * 2 + 1;
while (i > 0 && j >= 0) {
b[i--] = b[j--];
b[i--] = 0;
}
return k * 2;
}
static struct pcm_feederdesc desc_8to16le[] = {
{FEEDER_FMT, AFMT_U8, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_8to16le =
{ "8to16le", 0, desc_8to16le, NULL, NULL, feed_8to16le };
SYSINIT(feeder_8to16le, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_8to16le);
/*****************************************************************************/
static int
feed_16to8_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_16to8_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_16leto8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 1, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
j += 2;
}
return i;
}
static struct pcm_feederdesc desc_16leto8[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U8, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S8, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_16leto8 =
{ "16leto8", 1, desc_16leto8, feed_16to8_init, feed_16to8_free, feed_16leto8 };
SYSINIT(feeder_16leto8, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_16leto8);
/*****************************************************************************/
static int
feed_monotostereo8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k = f->source->feed(f->source, c, b, count / 2, stream);
j = k - 1;
i = j * 2 + 1;
while (i > 0 && j >= 0) {
b[i--] = b[j];
b[i--] = b[j];
j--;
}
return k * 2;
}
static struct pcm_feederdesc desc_monotostereo8[] = {
{FEEDER_FMT, AFMT_U8, AFMT_U8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_S8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_monotostereo8 =
{ "monotostereo8", 0, desc_monotostereo8, NULL, NULL, feed_monotostereo8 };
SYSINIT(feeder_monotostereo8, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_monotostereo8);
/*****************************************************************************/
static int
feed_monotostereo16(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k = f->source->feed(f->source, c, b, count / 2, stream);
u_int8_t x, y;
j = k - 1;
i = j * 2 + 1;
while (i > 3 && j >= 1) {
x = b[j--];
y = b[j--];
b[i--] = x;
b[i--] = y;
b[i--] = x;
b[i--] = y;
}
return k * 2;
}
static struct pcm_feederdesc desc_monotostereo16[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_U16_BE, AFMT_U16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_BE, AFMT_S16_BE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_monotostereo16 =
{ "monotostereo16", 0, desc_monotostereo16, NULL, NULL, feed_monotostereo16 };
SYSINIT(feeder_monotostereo16, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_monotostereo16);
/*****************************************************************************/
static int
feed_stereotomono8_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_stereotomono8_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_stereotomono8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 0, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
j += 2;
}
return i;
}
static struct pcm_feederdesc desc_stereotomono8[] = {
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_U8, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_S8, 0},
{0},
};
static pcm_feeder feeder_stereotomono8 =
{ "stereotomono8", 1, desc_stereotomono8, feed_stereotomono8_init, feed_stereotomono8_free, feed_stereotomono8 };
SYSINIT(feeder_stereotomono8, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_stereotomono8);
/*****************************************************************************/
static int
feed_stereotomono16_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_stereotomono16_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_stereotomono16(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 0, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
b[i++] = ((u_int8_t *)f->data)[j + 1];
j += 4;
}
return i;
}
static struct pcm_feederdesc desc_stereotomono16[] = {
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_BE, 0},
{FEEDER_FMT, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_BE, 0},
{0},
};
static pcm_feeder feeder_stereotomono16 =
{ "stereotomono16", 1, desc_stereotomono16, feed_stereotomono16_init, feed_stereotomono16_free, feed_stereotomono16 };
SYSINIT(feeder_stereotomono16, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_stereotomono16);
/*****************************************************************************/
static int
feed_endian(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int8_t t;
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
while (i < j) {
t = b[i];
b[i] = b[i + 1];
b[i + 1] = t;
i += 2;
}
return i;
}
static struct pcm_feederdesc desc_endian[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U16_BE, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S16_BE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_U16_BE, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_BE, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_endian = { "endian", -1, desc_endian, NULL, NULL, feed_endian };
SYSINIT(feeder_endian, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_endian);
/*****************************************************************************/
static int
feed_sign(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
int ssz = (int)f->data, ofs = ssz - 1;
while (i < j) {
b[i + ofs] ^= 0x80;
i += ssz;
}
return i;
}
static struct pcm_feederdesc desc_sign8[] = {
{FEEDER_FMT, AFMT_U8, AFMT_S8, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_U8, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_sign8 =
{ "sign8", 0, desc_sign8, NULL, NULL, feed_sign, (void *)1 };
SYSINIT(feeder_sign8, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_sign8);
static struct pcm_feederdesc desc_sign16le[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_sign16le =
{ "sign16le", -1, desc_sign16le, NULL, NULL, feed_sign, (void *)2 };
SYSINIT(feeder_sign16le, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_sign16le);
/*****************************************************************************/
static int
feed_table(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
while (i < j) {
b[i] = ((u_int8_t *)f->data)[b[i]];
i++;
}
return i;
}
static struct pcm_feederdesc desc_ulawtou8[] = {
{FEEDER_FMT, AFMT_MU_LAW, AFMT_U8, 0},
{FEEDER_FMT, AFMT_MU_LAW | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_ulawtou8 =
{ "ulawtou8", 0, desc_ulawtou8, NULL, NULL, feed_table, ulaw_to_u8 };
SYSINIT(feeder_ulawtou8, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_ulawtou8);
static struct pcm_feederdesc desc_u8toulaw[] = {
{FEEDER_FMT, AFMT_U8, AFMT_MU_LAW, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_MU_LAW | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_u8toulaw =
{ "u8toulaw", 0, desc_u8toulaw, NULL, NULL, feed_table, u8_to_ulaw };
SYSINIT(feeder_u8toulaw, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder_u8toulaw);
/*****************************************************************************/
static int
cmpdesc(struct pcm_feederdesc *n, struct pcm_feederdesc *m)
{
return ((n->type == m->type) && (n->in == m->in) && (n->out == m->out) && (n->flags == m->flags));
return ((n->type == m->type) &&
((n->in == 0) || (n->in == m->in)) &&
((n->out == 0) || (n->out == m->out)) &&
(n->flags == m->flags));
}
pcm_feeder *
@ -516,6 +112,39 @@ feeder_getroot()
return NULL;
}
int
feeder_set(pcm_feeder *feeder, int what, int value)
{
if (feeder->set)
return feeder->set(feeder, what, value);
else
return -1;
}
int
chn_addfeeder(pcm_channel *c, pcm_feeder *f)
{
pcm_feeder *nf;
struct pcm_feederdesc *nfdesc;
nf = malloc(sizeof(*nf), M_DEVBUF, M_NOWAIT);
nfdesc = malloc(sizeof(*nfdesc), M_DEVBUF, M_NOWAIT);
*nfdesc = *(f->desc);
*nf = *f;
nf->desc = nfdesc;
nf->source = c->feeder;
if (nf->init)
nf->init(nf);
if (nf->align > 0)
c->align += nf->align;
else if (nf->align < 0 && c->align < -nf->align)
c->align = -nf->align;
c->feeder = nf;
return 0;
}
int
chn_removefeeder(pcm_channel *c)
{
@ -526,11 +155,26 @@ chn_removefeeder(pcm_channel *c)
f = c->feeder->source;
if (c->feeder->free)
c->feeder->free(c->feeder);
free(c->feeder->desc, M_DEVBUF);
free(c->feeder, M_DEVBUF);
c->feeder = f;
return 0;
}
pcm_feeder *
chn_findfeeder(pcm_channel *c, u_int32_t type)
{
pcm_feeder *f;
f = c->feeder;
while (f != NULL) {
if (f->desc->type == type)
return f;
f = f->source;
}
return NULL;
}
static int
chainok(pcm_feeder *test, pcm_feeder *stop)
{
@ -597,7 +241,7 @@ feeder_fmtchain(u_int32_t *to, pcm_feeder *source, pcm_feeder *stop, int maxdept
}
u_int32_t
chn_feedchain(pcm_channel *c, u_int32_t *to)
chn_fmtchain(pcm_channel *c, u_int32_t *to)
{
pcm_feeder *try, *stop;
int max;
@ -635,3 +279,39 @@ chn_feedchain(pcm_channel *c, u_int32_t *to)
#endif
return c->feeder->desc->out;
}
/*****************************************************************************/
static int
feed_root(pcm_feeder *feeder, pcm_channel *ch, u_int8_t *buffer, u_int32_t count, struct uio *stream)
{
int ret, s;
KASSERT(count, ("feed_root: count == 0"));
count &= ~((1 << ch->align) - 1);
KASSERT(count, ("feed_root: aligned count == 0 (align = %d)", ch->align));
s = spltty();
count = min(count, stream->uio_resid);
if (count) {
ret = uiomove(buffer, count, stream);
KASSERT(ret == 0, ("feed_root: uiomove failed"));
}
splx(s);
return count;
}
static pcm_feeder feeder_root = {
"root",
0,
NULL,
NULL,
NULL,
NULL,
feed_root,
};
SYSINIT(feeder_root, SI_SUB_DRIVERS, SI_ORDER_FIRST, feeder_register, &feeder_root);

17
sys/dev/sound/pcm/feeder.h
View File

@ -29,8 +29,23 @@
void feeder_register(void *p);
pcm_feeder *feeder_get(struct pcm_feederdesc *desc);
pcm_feeder *feeder_getroot(void);
int feeder_set(pcm_feeder *feeder, int what, int value);
u_int32_t chn_feedchain(pcm_channel *c, u_int32_t *to);
u_int32_t chn_fmtchain(pcm_channel *c, u_int32_t *to);
int chn_addfeeder(pcm_channel *c, pcm_feeder *f);
int chn_removefeeder(pcm_channel *c);
pcm_feeder *chn_findfeeder(pcm_channel *c, u_int32_t type);
#define FEEDER_DECLARE(feeder) SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder)
#define FEEDER_ROOT 1
#define FEEDER_FMT 2
#define FEEDER_RATE 3
#define FEEDER_FILTER 4
#define FEEDER_VOLUME 5
#define FEEDER_LAST FEEDER_VOLUME
#define FEEDRATE_SRC 1
#define FEEDRATE_DST 2

496
sys/dev/sound/pcm/feeder_fmt.c Normal file
View File

@ -0,0 +1,496 @@
/*
* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include <dev/sound/pcm/sound.h>
#define FEEDBUFSZ 8192
static unsigned char ulaw_to_u8[] = {
3, 7, 11, 15, 19, 23, 27, 31,
35, 39, 43, 47, 51, 55, 59, 63,
66, 68, 70, 72, 74, 76, 78, 80,
82, 84, 86, 88, 90, 92, 94, 96,
98, 99, 100, 101, 102, 103, 104, 105,
106, 107, 108, 109, 110, 111, 112, 113,
113, 114, 114, 115, 115, 116, 116, 117,
117, 118, 118, 119, 119, 120, 120, 121,
121, 121, 122, 122, 122, 122, 123, 123,
123, 123, 124, 124, 124, 124, 125, 125,
125, 125, 125, 125, 126, 126, 126, 126,
126, 126, 126, 126, 127, 127, 127, 127,
127, 127, 127, 127, 127, 127, 127, 127,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
253, 249, 245, 241, 237, 233, 229, 225,
221, 217, 213, 209, 205, 201, 197, 193,
190, 188, 186, 184, 182, 180, 178, 176,
174, 172, 170, 168, 166, 164, 162, 160,
158, 157, 156, 155, 154, 153, 152, 151,
150, 149, 148, 147, 146, 145, 144, 143,
143, 142, 142, 141, 141, 140, 140, 139,
139, 138, 138, 137, 137, 136, 136, 135,
135, 135, 134, 134, 134, 134, 133, 133,
133, 133, 132, 132, 132, 132, 131, 131,
131, 131, 131, 131, 130, 130, 130, 130,
130, 130, 130, 130, 129, 129, 129, 129,
129, 129, 129, 129, 129, 129, 129, 129,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
};
static unsigned char u8_to_ulaw[] = {
0, 0, 0, 0, 0, 1, 1, 1,
1, 2, 2, 2, 2, 3, 3, 3,
3, 4, 4, 4, 4, 5, 5, 5,
5, 6, 6, 6, 6, 7, 7, 7,
7, 8, 8, 8, 8, 9, 9, 9,
9, 10, 10, 10, 10, 11, 11, 11,
11, 12, 12, 12, 12, 13, 13, 13,
13, 14, 14, 14, 14, 15, 15, 15,
15, 16, 16, 17, 17, 18, 18, 19,
19, 20, 20, 21, 21, 22, 22, 23,
23, 24, 24, 25, 25, 26, 26, 27,
27, 28, 28, 29, 29, 30, 30, 31,
31, 32, 33, 34, 35, 36, 37, 38,
39, 40, 41, 42, 43, 44, 45, 46,
47, 49, 51, 53, 55, 57, 59, 61,
63, 66, 70, 74, 78, 84, 92, 104,
254, 231, 219, 211, 205, 201, 197, 193,
190, 188, 186, 184, 182, 180, 178, 176,
175, 174, 173, 172, 171, 170, 169, 168,
167, 166, 165, 164, 163, 162, 161, 160,
159, 159, 158, 158, 157, 157, 156, 156,
155, 155, 154, 154, 153, 153, 152, 152,
151, 151, 150, 150, 149, 149, 148, 148,
147, 147, 146, 146, 145, 145, 144, 144,
143, 143, 143, 143, 142, 142, 142, 142,
141, 141, 141, 141, 140, 140, 140, 140,
139, 139, 139, 139, 138, 138, 138, 138,
137, 137, 137, 137, 136, 136, 136, 136,
135, 135, 135, 135, 134, 134, 134, 134,
133, 133, 133, 133, 132, 132, 132, 132,
131, 131, 131, 131, 130, 130, 130, 130,
129, 129, 129, 129, 128, 128, 128, 128,
};
/*****************************************************************************/
static int
feed_8to16le(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k;
k = f->source->feed(f->source, c, b, count / 2, stream);
j = k - 1;
i = j * 2 + 1;
while (i > 0 && j >= 0) {
b[i--] = b[j--];
b[i--] = 0;
}
return k * 2;
}
static struct pcm_feederdesc desc_8to16le[] = {
{FEEDER_FMT, AFMT_U8, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_8to16le = {
"8to16le",
0,
desc_8to16le,
NULL,
NULL,
NULL,
feed_8to16le,
};
FEEDER_DECLARE(feeder_8to16le);
/*****************************************************************************/
static int
feed_16to8_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_16to8_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_16leto8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 1, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
j += 2;
}
return i;
}
static struct pcm_feederdesc desc_16leto8[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U8, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S8, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_16leto8 = {
"16leto8",
1,
desc_16leto8,
feed_16to8_init,
feed_16to8_free,
NULL,
feed_16leto8,
};
FEEDER_DECLARE(feeder_16leto8);
/*****************************************************************************/
static int
feed_monotostereo8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k = f->source->feed(f->source, c, b, count / 2, stream);
j = k - 1;
i = j * 2 + 1;
while (i > 0 && j >= 0) {
b[i--] = b[j];
b[i--] = b[j];
j--;
}
return k * 2;
}
static struct pcm_feederdesc desc_monotostereo8[] = {
{FEEDER_FMT, AFMT_U8, AFMT_U8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_S8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_monotostereo8 = {
"monotostereo8",
0,
desc_monotostereo8,
NULL,
NULL,
NULL,
feed_monotostereo8,
};
FEEDER_DECLARE(feeder_monotostereo8);
/*****************************************************************************/
static int
feed_monotostereo16(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i, j, k = f->source->feed(f->source, c, b, count / 2, stream);
u_int8_t x, y;
j = k - 1;
i = j * 2 + 1;
while (i > 3 && j >= 1) {
x = b[j--];
y = b[j--];
b[i--] = x;
b[i--] = y;
b[i--] = x;
b[i--] = y;
}
return k * 2;
}
static struct pcm_feederdesc desc_monotostereo16[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_U16_BE, AFMT_U16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_BE, AFMT_S16_BE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_monotostereo16 = {
"monotostereo16",
0,
desc_monotostereo16,
NULL,
NULL,
NULL,
feed_monotostereo16,
};
FEEDER_DECLARE(feeder_monotostereo16);
/*****************************************************************************/
static int
feed_stereotomono8_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_stereotomono8_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_stereotomono8(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 0, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
j += 2;
}
return i;
}
static struct pcm_feederdesc desc_stereotomono8[] = {
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_U8, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_S8, 0},
{0},
};
static pcm_feeder feeder_stereotomono8 = {
"stereotomono8",
1,
desc_stereotomono8,
feed_stereotomono8_init,
feed_stereotomono8_free,
NULL,
feed_stereotomono8,
};
FEEDER_DECLARE(feeder_stereotomono8);
/*****************************************************************************/
static int
feed_stereotomono16_init(pcm_feeder *f)
{
f->data = malloc(FEEDBUFSZ, M_DEVBUF, M_NOWAIT);
return (f->data == NULL);
}
static int
feed_stereotomono16_free(pcm_feeder *f)
{
if (f->data) free(f->data, M_DEVBUF);
f->data = NULL;
return 0;
}
static int
feed_stereotomono16(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int32_t i = 0, toget = count * 2;
int j = 0, k;
k = f->source->feed(f->source, c, f->data, min(toget, FEEDBUFSZ), stream);
while (j < k) {
b[i++] = ((u_int8_t *)f->data)[j];
b[i++] = ((u_int8_t *)f->data)[j + 1];
j += 4;
}
return i;
}
static struct pcm_feederdesc desc_stereotomono16[] = {
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_BE, 0},
{FEEDER_FMT, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_BE, 0},
{0},
};
static pcm_feeder feeder_stereotomono16 = {
"stereotomono16",
1,
desc_stereotomono16,
feed_stereotomono16_init,
feed_stereotomono16_free,
NULL,
feed_stereotomono16,
};
FEEDER_DECLARE(feeder_stereotomono16);
/*****************************************************************************/
static int
feed_endian(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
u_int8_t t;
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
while (i < j) {
t = b[i];
b[i] = b[i + 1];
b[i + 1] = t;
i += 2;
}
return i;
}
static struct pcm_feederdesc desc_endian[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_U16_BE, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_S16_BE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_BE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_U16_BE, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_BE, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_endian = {
"endian",
-1,
desc_endian,
NULL,
NULL,
NULL,
feed_endian,
};
FEEDER_DECLARE(feeder_endian);
/*****************************************************************************/
static int
feed_sign(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
int ssz = (int)f->data, ofs = ssz - 1;
while (i < j) {
b[i + ofs] ^= 0x80;
i += ssz;
}
return i;
}
static struct pcm_feederdesc desc_sign8[] = {
{FEEDER_FMT, AFMT_U8, AFMT_S8, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S8, AFMT_U8, 0},
{FEEDER_FMT, AFMT_S8 | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_sign8 = {
"sign8",
0,
desc_sign8,
NULL,
NULL,
NULL,
feed_sign,
(void *)1,
};
FEEDER_DECLARE(feeder_sign8);
static struct pcm_feederdesc desc_sign16le[] = {
{FEEDER_FMT, AFMT_U16_LE, AFMT_S16_LE, 0},
{FEEDER_FMT, AFMT_U16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{FEEDER_FMT, AFMT_S16_LE, AFMT_U16_LE, 0},
{FEEDER_FMT, AFMT_S16_LE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_sign16le = {
"sign16le",
-1,
desc_sign16le,
NULL,
NULL,
NULL,
feed_sign,
(void *)2,
};
FEEDER_DECLARE(feeder_sign16le);
/*****************************************************************************/
static int
feed_table(pcm_feeder *f, pcm_channel *c, u_int8_t *b, u_int32_t count, struct uio *stream)
{
int i = 0, j = f->source->feed(f->source, c, b, count, stream);
while (i < j) {
b[i] = ((u_int8_t *)f->data)[b[i]];
i++;
}
return i;
}
static struct pcm_feederdesc desc_ulawtou8[] = {
{FEEDER_FMT, AFMT_MU_LAW, AFMT_U8, 0},
{FEEDER_FMT, AFMT_MU_LAW | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_ulawtou8 = {
"ulawtou8",
0,
desc_ulawtou8,
NULL,
NULL,
NULL,
feed_table,
ulaw_to_u8,
};
FEEDER_DECLARE(feeder_ulawtou8);
static struct pcm_feederdesc desc_u8toulaw[] = {
{FEEDER_FMT, AFMT_U8, AFMT_MU_LAW, 0},
{FEEDER_FMT, AFMT_U8 | AFMT_STEREO, AFMT_MU_LAW | AFMT_STEREO, 0},
{0},
};
static pcm_feeder feeder_u8toulaw = {
"u8toulaw",
0,
desc_u8toulaw,
NULL,
NULL,
NULL,
feed_table,
u8_to_ulaw,
};
FEEDER_DECLARE(feeder_u8toulaw);