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/* $NetBSD: aurateconv.c,v 1.8 2002/11/07 06:51:51 thorpej Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by TAMURA Kent
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: aurateconv.c,v 1.8 2002/11/07 06:51:51 thorpej Exp $");
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/select.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/audiovar.h>
#undef AURATECONV_DEBUG
#ifdef AURATECONV_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
static int auconv_play_slinear16_LE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_play_slinear24_LE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_play_slinear16_BE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_play_slinear24_BE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_record_slinear16_LE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_record_slinear24_LE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_record_slinear16_BE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
static int auconv_record_slinear24_BE(struct auconv_context *,
const struct audio_params *, uint8_t *, const uint8_t *, int);
int
auconv_check_params(const struct audio_params *params)
{
DPRINTF(("auconv_check_params: rate=%ld:%ld chan=%d:%d prec=%d:%d "
"enc=%d:%d\n", params->sample_rate, params->hw_sample_rate,
params->channels, params->hw_channels, params->precision,
params->hw_precision, params->encoding, params->hw_encoding));
if (params->hw_channels == params->channels
&& params->hw_sample_rate == params->sample_rate)
return 0; /* No conversion */
if ((params->hw_encoding != AUDIO_ENCODING_SLINEAR_LE
&& params->hw_encoding != AUDIO_ENCODING_SLINEAR_BE)
|| (params->hw_precision != 16 && params->hw_precision != 24))
return (EINVAL);
if (params->hw_channels != params->channels) {
if (params->hw_channels == 1 && params->channels == 2) {
/* Ok */
} else if (params->hw_channels == 2 && params->channels == 1) {
/* Ok */
} else if (params->hw_channels > params->channels) {
/* Ok */
} else
return (EINVAL);
}
if (params->hw_channels > AUDIO_MAX_CHANNELS
|| params->channels > AUDIO_MAX_CHANNELS)
return (EINVAL);
if (params->hw_sample_rate != params->sample_rate)
if (params->hw_sample_rate <= 0 || params->sample_rate <= 0)
return (EINVAL);
return 0;
}
void
auconv_init_context(struct auconv_context *context, long src_rate,
long dst_rate, uint8_t *start, uint8_t *end)
{
int i;
context->ring_start = start;
context->ring_end = end;
if (dst_rate > src_rate) {
context->count = src_rate;
} else {
context->count = 0;
}
for (i = 0; i < AUDIO_MAX_CHANNELS; i++)
context->prev[i] = 0;
}
/*
* src is a ring buffer.
*/
int
auconv_record(struct auconv_context *context,
const struct audio_params *params, uint8_t *dest,
const uint8_t *src, int srcsize)
{
if (params->hw_sample_rate == params->sample_rate
&& params->hw_channels == params->channels) {
int n;
n = context->ring_end - src;
if (srcsize <= n)
memcpy(dest, src, srcsize);
else {
memcpy(dest, src, n);
memcpy(dest + n, context->ring_start, srcsize - n);
}
return srcsize;
}
switch (params->hw_encoding) {
case AUDIO_ENCODING_SLINEAR_LE:
switch (params->hw_precision) {
case 16:
return auconv_record_slinear16_LE(context, params,
dest, src, srcsize);
case 24:
return auconv_record_slinear24_LE(context, params,
dest, src, srcsize);
}
break;
case AUDIO_ENCODING_SLINEAR_BE:
switch (params->hw_precision) {
case 16:
return auconv_record_slinear16_BE(context, params,
dest, src, srcsize);
case 24:
return auconv_record_slinear24_BE(context, params,
dest, src, srcsize);
}
break;
default:
/* This should be rejected in auconv_check_params() */
printf("auconv_record: unimplemented encoding: %d\n",
params->hw_encoding);
return 0;
}
printf("auconv_record: unimplemented precision: %d\n",
params->hw_precision);
return 0;
}
/*
* dest is a ring buffer.
*/
int
auconv_play(struct auconv_context *context, const struct audio_params *params,
uint8_t *dest, const uint8_t *src, int srcsize)
{
int n;
if (params->hw_sample_rate == params->sample_rate
&& params->hw_channels == params->channels) {
n = context->ring_end - dest;
if (srcsize <= n) {
memcpy(dest, src, srcsize);
} else {
memcpy(dest, src, n);
memcpy(context->ring_start, src + n, srcsize - n);
}
return srcsize;
}
switch (params->hw_encoding) {
case AUDIO_ENCODING_SLINEAR_LE:
switch (params->hw_precision) {
case 16:
return auconv_play_slinear16_LE(context, params,
dest, src, srcsize);
case 24:
return auconv_play_slinear24_LE(context, params,
dest, src, srcsize);
}
break;
case AUDIO_ENCODING_SLINEAR_BE:
switch (params->hw_precision) {
case 16:
return auconv_play_slinear16_BE(context, params,
dest, src, srcsize);
case 24:
return auconv_play_slinear24_BE(context, params,
dest, src, srcsize);
}
break;
default:
/* This should be rejected in auconv_check_params() */
printf("auconv_play: unimplemented encoding: %d\n",
params->hw_encoding);
return 0;
}
printf("auconv_play: unimplemented precision: %d\n",
params->hw_precision);
return 0;
}
#define RING_CHECK(C, V) \
do { \
if (V >= (C)->ring_end) \
V = (C)->ring_start; \
} while (/*CONSTCOND*/ 0)
#define READ_S8LE(P) *(int8_t*)(P)
#define WRITE_S8LE(P, V) *(int8_t*)(P) = V
#define READ_S8BE(P) *(int8_t*)(P)
#define WRITE_S8BE(P, V) *(int8_t*)(P) = V
#if BYTE_ORDER == LITTLE_ENDIAN
# define READ_S16LE(P) *(int16_t*)(P)
# define WRITE_S16LE(P, V) *(int16_t*)(P) = V
# define READ_S16BE(P) (int16_t)((P)[0] | ((P)[1]<<8))
# define WRITE_S16BE(P, V) \
do { \
int vv = V; \
(P)[0] = vv; \
(P)[1] = vv >> 8; \
} while (/*CONSTCOND*/ 0)
#else
# define READ_S16LE(P) (int16_t)((P)[0] | ((P)[1]<<8))
# define WRITE_S16LE(P, V) \
do { \
int vv = V; \
(P)[0] = vv; \
(P)[1] = vv >> 8; \
} while (/*CONSTCOND*/ 0)
# define READ_S16BE(P) *(int16_t*)(P)
# define WRITE_S16BE(P, V) *(int16_t*)(P) = V
#endif
#define READ_S24LE(P) (int32_t)((P)[0] | ((P)[1]<<8) | (((int8_t)((P)[2]))<<16))
#define WRITE_S24LE(P, V) \
do { \
int vvv = V; \
(P)[0] = vvv; \
(P)[1] = vvv >> 8; \
(P)[2] = vvv >> 16; \
} while (/*CONSTCOND*/ 0)
#define READ_S24BE(P) (int32_t)((P)[2] | ((P)[1]<<8) | (((int8_t)((P)[0]))<<16))
#define WRITE_S24BE(P, V) \
do { \
int vvv = V; \
(P)[0] = vvv >> 16; \
(P)[1] = vvv >> 8; \
(P)[2] = vvv; \
} while (/*CONSTCOND*/ 0)
#define P_READ_Sn(BITS, EN, V, RP, PAR) \
do { \
int j; \
for (j = 0; j < (PAR)->channels; j++) { \
(V)[j] = READ_S##BITS##EN(RP); \
RP += (BITS) / NBBY; \
} \
} while (/*CONSTCOND*/ 0)
#define P_WRITE_Sn(BITS, EN, V, WP, PAR, CON, WC) \
do { \
if ((PAR)->channels == 2 && (PAR)->hw_channels == 1) { \
WRITE_S##BITS##EN(WP, ((V)[0] + (V)[1]) / 2); \
WP += (BITS) / NBBY; \
RING_CHECK(CON, WP); \
WC += (BITS) / NBBY; \
} else { /* channels <= hw_channels */ \
int j; \
for (j = 0; j < (PAR)->channels; j++) { \
WRITE_S##BITS##EN(WP, (V)[j]); \
WP += (BITS) / NBBY; \
RING_CHECK(CON, WP); \
} \
if (j == 1 && 1 < (PAR)->hw_channels) { \
WRITE_S##BITS##EN(WP, (V)[0]); \
WP += (BITS) / NBBY; \
RING_CHECK(CON, WP); \
j++; \
} \
for (; j < (PAR)->hw_channels; j++) { \
WRITE_S##BITS##EN(WP, 0); \
WP += (BITS) / NBBY; \
RING_CHECK(CON, WP); \
} \
WC += (BITS) / NBBY * j; \
} \
} while (/*CONSTCOND*/ 0)
#define R_READ_Sn(BITS, EN, V, RP, PAR, CON, RC) \
do { \
int j; \
for (j = 0; j < (PAR)->hw_channels; j++) { \
(V)[j] = READ_S##BITS##EN(RP); \
RP += (BITS) / NBBY; \
RING_CHECK(CON, RP); \
RC += (BITS) / NBBY; \
} \
} while (/*CONSTCOND*/ 0)
#define R_WRITE_Sn(BITS, EN, V, WP, PAR, WC) \
do { \
if ((PAR)->channels == 2 && (PAR)->hw_channels == 1) { \
WRITE_S##BITS##EN(WP, (V)[0]); \
WP += (BITS) / NBBY; \
WRITE_S##BITS##EN(WP, (V)[0]); \
WP += (BITS) / NBBY; \
WC += (BITS) / NBBY * 2; \
} else if ((PAR)->channels == 1 && (PAR)->hw_channels >= 2) { \
WRITE_S##BITS##EN(WP, ((V)[0] + (V)[1]) / 2); \
WP += (BITS) / NBBY; \
WC += (BITS) / NBBY; \
} else { /* channels <= hw_channels */ \
int j; \
for (j = 0; j < (PAR)->channels; j++) { \
WRITE_S##BITS##EN(WP, (V)[j]); \
WP += (BITS) / NBBY; \
} \
WC += (BITS) / NBBY * j; \
} \
} while (/*CONSTCOND*/ 0)
/*
* Function templates
*
* Source may be 1 sample. Destination buffer must have space for converted
* source.
* Don't use them for 32bit data because this linear interpolation overflows
* for 32bit data.
*/
#define AUCONV_PLAY_SLINEAR(BITS, EN) \
static int \
auconv_play_slinear##BITS##_##EN (struct auconv_context *context, \
const struct audio_params *params, \
uint8_t *dest, const uint8_t *src, \
int srcsize) \
{ \
int wrote; \
uint8_t *w; \
const uint8_t *r; \
const uint8_t *src_end; \
int32_t v[AUDIO_MAX_CHANNELS]; \
int32_t prev[AUDIO_MAX_CHANNELS], next[AUDIO_MAX_CHANNELS], c256; \
int i, values_size; \
\
wrote = 0; \
w = dest; \
r = src; \
src_end = src + srcsize; \
if (params->sample_rate == params->hw_sample_rate) { \
while (r < src_end) { \
P_READ_Sn(BITS, EN, v, r, params); \
P_WRITE_Sn(BITS, EN, v, w, params, context, wrote); \
} \
} else if (params->hw_sample_rate < params->sample_rate) { \
for (;;) { \
do { \
if (r >= src_end) \
return wrote; \
P_READ_Sn(BITS, EN, v, r, params); \
context->count += params->hw_sample_rate; \
} while (context->count < params->sample_rate); \
context->count -= params->sample_rate; \
P_WRITE_Sn(BITS, EN, v, w, params, context, wrote); \
} \
} else { \
/* Initial value of context->count is params->sample_rate */ \
values_size = sizeof(int32_t) * params->channels; \
memcpy(prev, context->prev, values_size); \
P_READ_Sn(BITS, EN, next, r, params); \
for (;;) { \
c256 = context->count * 256 / params->hw_sample_rate; \
for (i = 0; i < params->channels; i++) \
v[i] = (c256 * next[i] + (256 - c256) * prev[i]) >> 8; \
P_WRITE_Sn(BITS, EN, v, w, params, context, wrote); \
context->count += params->sample_rate; \
if (context->count >= params->hw_sample_rate) { \
context->count -= params->hw_sample_rate; \
memcpy(prev, next, values_size); \
if (r >= src_end) \
break; \
P_READ_Sn(BITS, EN, next, r, params); \
} \
} \
memcpy(context->prev, next, values_size); \
} \
return wrote; \
}
#define AUCONV_RECORD_SLINEAR(BITS, EN) \
static int \
auconv_record_slinear##BITS##_##EN (struct auconv_context *context, \
const struct audio_params *params, \
uint8_t *dest, const uint8_t *src, \
int srcsize) \
{ \
int wrote, rsize; \
uint8_t *w; \
const uint8_t *r; \
int32_t v[AUDIO_MAX_CHANNELS]; \
int32_t prev[AUDIO_MAX_CHANNELS], next[AUDIO_MAX_CHANNELS], c256; \
int i, values_size; \
\
wrote = 0; \
rsize = 0; \
w = dest; \
r = src; \
if (params->sample_rate == params->hw_sample_rate) { \
while (rsize < srcsize) { \
R_READ_Sn(BITS, EN, v, r, params, context, rsize); \
R_WRITE_Sn(BITS, EN, v, w, params, wrote); \
} \
} else if (params->sample_rate < params->hw_sample_rate) { \
for (;;) { \
do { \
if (rsize >= srcsize) \
return wrote; \
R_READ_Sn(BITS, EN, v, r, params, context, rsize); \
context->count += params->sample_rate; \
} while (context->count < params->hw_sample_rate); \
context->count -= params->hw_sample_rate; \
R_WRITE_Sn(BITS, EN, v, w, params, wrote); \
} \
} else { \
/* Initial value of context->count is params->hw_sample_rate */ \
values_size = sizeof(int32_t) * params->hw_channels; \
memcpy(prev, context->prev, values_size); \
R_READ_Sn(BITS, EN, next, r, params, context, rsize); \
for (;;) { \
c256 = context->count * 256 / params->sample_rate; \
for (i = 0; i < params->hw_channels; i++) \
v[i] = (c256 * next[i] + (256 - c256) * prev[i]) >> 8; \
R_WRITE_Sn(BITS, EN, v, w, params, wrote); \
context->count += params->hw_sample_rate; \
if (context->count >= params->sample_rate) { \
context->count -= params->sample_rate; \
memcpy(prev, next, values_size); \
if (rsize >= srcsize) \
break; \
R_READ_Sn(BITS, EN, next, r, params, context, rsize); \
} \
} \
memcpy(context->prev, next, values_size); \
} \
return wrote; \
}
AUCONV_PLAY_SLINEAR(16, LE)
AUCONV_PLAY_SLINEAR(24, LE)
AUCONV_PLAY_SLINEAR(16, BE)
AUCONV_PLAY_SLINEAR(24, BE)
AUCONV_RECORD_SLINEAR(16, LE)
AUCONV_RECORD_SLINEAR(24, LE)
AUCONV_RECORD_SLINEAR(16, BE)
AUCONV_RECORD_SLINEAR(24, BE)
|