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/*-
* Copyright (c) 2005 Ariff Abdullah <ariff@FreeBSD.org>
* 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.
*/
/* feeder_volume, a long 'Lost Technology' rather than a new feature. */
#include <dev/sound/pcm/sound.h>
#include "feeder_if.h"
SND_DECLARE_FILE("$FreeBSD$");
#define FVOL_OSS_SCALE 100
#define FVOL_RESOLUTION PCM_FXSHIFT
#define FVOL_CLAMP(val) (((val) << FVOL_RESOLUTION) / FVOL_OSS_SCALE)
#define FVOL_LEFT(val) FVOL_CLAMP((val) & 0x7f)
#define FVOL_RIGHT(val) FVOL_LEFT((val) >> 8)
#define FVOL_MAX (1 << FVOL_RESOLUTION)
#define FVOL_CALC(sval, vval) (((sval) * (vval)) >> FVOL_RESOLUTION)
typedef uint32_t (*feed_volume_filter)(uint8_t *, int *, uint32_t);
#define FEEDER_VOLUME_FILTER(FMTBIT, VOL_INTCAST, SIGN, SIGNS, ENDIAN, ENDIANS) \
static uint32_t \
feed_volume_filter_##SIGNS##FMTBIT##ENDIANS(uint8_t *b, int *vol, \
uint32_t count) \
{ \
int32_t j; \
int i; \
\
i = count; \
b += i; \
\
do { \
b -= PCM_##FMTBIT##_BPS; \
i -= PCM_##FMTBIT##_BPS; \
j = PCM_READ_##SIGN##FMTBIT##_##ENDIAN(b); \
j = FVOL_CALC((VOL_INTCAST)j, \
vol[(i / PCM_##FMTBIT##_BPS) & 1]); \
PCM_WRITE_##SIGN##FMTBIT##_##ENDIAN(b, j); \
} while (i != 0); \
\
return (count); \
}
FEEDER_VOLUME_FILTER(8, int32_t, S, s, NE, ne)
FEEDER_VOLUME_FILTER(16, int32_t, S, s, LE, le)
FEEDER_VOLUME_FILTER(24, int32_t, S, s, LE, le)
FEEDER_VOLUME_FILTER(32, intpcm_t, S, s, LE, le)
FEEDER_VOLUME_FILTER(16, int32_t, S, s, BE, be)
FEEDER_VOLUME_FILTER(24, int32_t, S, s, BE, be)
FEEDER_VOLUME_FILTER(32, intpcm_t, S, s, BE, be)
FEEDER_VOLUME_FILTER(8, int32_t, U, u, NE, ne)
FEEDER_VOLUME_FILTER(16, int32_t, U, u, LE, le)
FEEDER_VOLUME_FILTER(24, int32_t, U, u, LE, le)
FEEDER_VOLUME_FILTER(32, intpcm_t, U, u, LE, le)
FEEDER_VOLUME_FILTER(16, int32_t, U, u, BE, be)
FEEDER_VOLUME_FILTER(24, int32_t, U, u, BE, be)
FEEDER_VOLUME_FILTER(32, intpcm_t, U, u, BE, be)
struct feed_volume_info {
uint32_t format;
int bps;
feed_volume_filter filter;
};
static struct feed_volume_info feed_volume_tbl[] = {
{ AFMT_S8, PCM_8_BPS, feed_volume_filter_s8ne },
{ AFMT_S16_LE, PCM_16_BPS, feed_volume_filter_s16le },
{ AFMT_S24_LE, PCM_24_BPS, feed_volume_filter_s24le },
{ AFMT_S32_LE, PCM_32_BPS, feed_volume_filter_s32le },
{ AFMT_S16_BE, PCM_16_BPS, feed_volume_filter_s16be },
{ AFMT_S24_BE, PCM_24_BPS, feed_volume_filter_s24be },
{ AFMT_S32_BE, PCM_32_BPS, feed_volume_filter_s32be },
{ AFMT_U8, PCM_8_BPS, feed_volume_filter_u8ne },
{ AFMT_U16_LE, PCM_16_BPS, feed_volume_filter_u16le },
{ AFMT_U24_LE, PCM_24_BPS, feed_volume_filter_u24le },
{ AFMT_U32_LE, PCM_32_BPS, feed_volume_filter_u32le },
{ AFMT_U16_BE, PCM_16_BPS, feed_volume_filter_u16be },
{ AFMT_U24_BE, PCM_24_BPS, feed_volume_filter_u24be },
{ AFMT_U32_BE, PCM_32_BPS, feed_volume_filter_u32be },
};
#define FVOL_DATA(i, c) ((intptr_t)((((i) & 0x1f) << 4) | ((c) & 0xf)))
#define FVOL_INFOIDX(m) (((m) >> 4) & 0x1f)
#define FVOL_CHANNELS(m) ((m) & 0xf)
static int
feed_volume_init(struct pcm_feeder *f)
{
int i, channels;
if (f->desc->in != f->desc->out)
return (EINVAL);
/* For now, this is mandatory! */
if (!(f->desc->out & AFMT_STEREO))
return (EINVAL);
channels = 2;
for (i = 0; i < sizeof(feed_volume_tbl) / sizeof(feed_volume_tbl[0]);
i++) {
if ((f->desc->out & ~AFMT_STEREO) ==
feed_volume_tbl[i].format) {
f->data = (void *)FVOL_DATA(i, channels);
return (0);
}
}
return (-1);
}
static int
feed_volume(struct pcm_feeder *f, struct pcm_channel *c, uint8_t *b,
uint32_t count, void *source)
{
struct feed_volume_info *info;
int vol[2];
int k, smpsz;
vol[0] = FVOL_LEFT(c->volume);
vol[1] = FVOL_RIGHT(c->volume);
if (vol[0] == FVOL_MAX && vol[1] == FVOL_MAX)
return (FEEDER_FEED(f->source, c, b, count, source));
info = &feed_volume_tbl[FVOL_INFOIDX((intptr_t)f->data)];
smpsz = info->bps * FVOL_CHANNELS((intptr_t)f->data);
if (count < smpsz)
return (0);
k = FEEDER_FEED(f->source, c, b, count - (count % smpsz), source);
if (k < smpsz)
return (0);
k -= k % smpsz;
return (info->filter(b, vol, k));
}
static struct pcm_feederdesc feeder_volume_desc[] = {
{FEEDER_VOLUME, AFMT_S8 | AFMT_STEREO, AFMT_S8 | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S16_LE | AFMT_STEREO, AFMT_S16_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S24_LE | AFMT_STEREO, AFMT_S24_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S32_LE | AFMT_STEREO, AFMT_S32_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S16_BE | AFMT_STEREO, AFMT_S16_BE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S24_BE | AFMT_STEREO, AFMT_S24_BE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_S32_BE | AFMT_STEREO, AFMT_S32_BE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U8 | AFMT_STEREO, AFMT_U8 | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U16_LE | AFMT_STEREO, AFMT_U16_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U24_LE | AFMT_STEREO, AFMT_U24_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U32_LE | AFMT_STEREO, AFMT_U32_LE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U16_BE | AFMT_STEREO, AFMT_U16_BE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U24_BE | AFMT_STEREO, AFMT_U24_BE | AFMT_STEREO, 0},
{FEEDER_VOLUME, AFMT_U32_BE | AFMT_STEREO, AFMT_U32_BE | AFMT_STEREO, 0},
{0, 0, 0, 0},
};
static kobj_method_t feeder_volume_methods[] = {
KOBJMETHOD(feeder_init, feed_volume_init),
KOBJMETHOD(feeder_feed, feed_volume),
{0, 0}
};
FEEDER_DECLARE(feeder_volume, 2, NULL);
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