NetBSD/sys/dev/auconv.h

167 lines
6.2 KiB
C

/* $NetBSD: auconv.h,v 1.12 2005/01/10 22:01:37 kent Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson.
*
* 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.
*/
#ifndef _SYS_DEV_AUCONV_H_
#define _SYS_DEV_AUCONV_H_
#include <dev/audio_if.h>
/* common routines for stream_filter_t */
extern void stream_filter_set_fetcher(stream_filter_t *, stream_fetcher_t *);
extern void stream_filter_set_inputbuffer(stream_filter_t *, audio_stream_t *);
extern stream_filter_t *auconv_nocontext_filter_factory
(int (*)(stream_fetcher_t *, audio_stream_t *, int));
extern void auconv_nocontext_filter_dtor(struct stream_filter *);
#define FILTER_LOOP_PROLOGUE(SRC, SRCFRAME, DST, DSTFRAME, MAXUSED) \
do { \
const uint8_t *s; \
uint8_t *d; \
s = (SRC)->outp; \
d = (DST)->inp; \
for (; audio_stream_get_used(DST) < MAXUSED \
&& audio_stream_get_used(SRC) >= SRCFRAME; \
s = audio_stream_add_outp(SRC, s, SRCFRAME), \
d = audio_stream_add_inp(DST, d, DSTFRAME))
#define FILTER_LOOP_EPILOGUE(SRC, DST) \
(SRC)->outp = s; \
(DST)->inp = d; \
} while (/*CONSTCOND*/0)
/* Convert between signed and unsigned. */
extern stream_filter_factory_t change_sign8;
extern stream_filter_factory_t change_sign16;
/* Convert between little and big endian. */
extern stream_filter_factory_t swap_bytes;
extern stream_filter_factory_t swap_bytes_change_sign16;
/* Byte expansion/contraction */
extern stream_filter_factory_t linear8_to_linear16;
extern stream_filter_factory_t linear16_to_linear8;
/* sampling rate conversion (aurateconv.c) */
extern stream_filter_factory_t aurateconv;
struct audio_format {
/**
* Device-dependent audio drivers may use this field freely.
*/
void *driver_data;
/**
* combination of AUMODE_PLAY and AUMODE_RECORD
*/
int32_t mode;
/**
* Encoding type. AUDIO_ENCODING_*.
* Don't use AUDIO_ENCODING_SLINEAR/ULINEAR/LINEAR/LINEAR8
*/
u_int encoding;
/**
* The size of valid bits in one sample.
* It must be <= precision.
*/
u_int validbits;
/**
* The bit size of one sample.
* It must be >= validbits, and is usualy a multiple of 8.
*/
u_int precision;
/**
* The number of channels. >= 1
*/
u_int channels;
u_int channel_mask;
#define AUFMT_UNKNOWN_POSITION 0U
#define AUFMT_FRONT_LEFT 0x00001U /* USB audio compatible */
#define AUFMT_FRONT_RIGHT 0x00002U /* USB audio compatible */
#define AUFMT_FRONT_CENTER 0x00004U /* USB audio compatible */
#define AUFMT_LOW_FREQUENCY 0x00008U /* USB audio compatible */
#define AUFMT_BACK_LEFT 0x00010U /* USB audio compatible */
#define AUFMT_BACK_RIGHT 0x00020U /* USB audio compatible */
#define AUFMT_FRONT_LEFT_OF_CENTER 0x00040U /* USB audio compatible */
#define AUFMT_FRONT_RIGHT_OF_CENTER 0x00080U /* USB audio compatible */
#define AUFMT_FRONT_BACK_CENTER 0x00100U /* USB audio compatible */
#define AUFMT_FRONT_SIDE_LEFT 0x00200U /* USB audio compatible */
#define AUFMT_FRONT_SIDE_RIGHT 0x00400U /* USB audio compatible */
#define AUFMT_FRONT_TOP_CENTER 0x00800U /* USB audio compatible */
#define AUFMT_FRONT_TOP_FRONT_LEFT 0x01000U
#define AUFMT_FRONT_TOP_FRONT_CENTER 0x02000U
#define AUFMT_FRONT_TOP_FRONT_RIGHT 0x04000U
#define AUFMT_FRONT_TOP_BACK_LEFT 0x08000U
#define AUFMT_FRONT_TOP_BACK_CENTER 0x10000U
#define AUFMT_FRONT_TOP_BACK_RIGHT 0x20000U
#define AUFMT_MONAURAL AUFMT_FRONT_CENTER
#define AUFMT_STEREO (AUFMT_FRONT_LEFT | AUFMT_FRONT_RIGHT)
#define AUFMT_SURROUND4 (AUFMT_STEREO | AUFMT_BACK_LEFT \
| AUFMT_BACK_RIGHT)
#define AUFMT_DOLBY_5_1 (AUFMT_SURROUND4 | AUFMT_FRONT_CENTER \
| AUFMT_LOW_FREQUENCY)
/**
* 0: frequency[0] is lower limit, and frequency[1] is higher limit.
* 1-16: frequency[0] to frequency[frequency_type-1] are valid.
*/
u_int frequency_type;
#define AUFMT_MAX_FREQUENCIES 16
/**
* sampling rates
*/
u_int frequency[AUFMT_MAX_FREQUENCIES];
};
#define AUFMT_INVALIDATE(fmt) (fmt)->mode |= 0x80000000
#define AUFMT_VALIDATE(fmt) (fmt)->mode &= 0x7fffffff
#define AUFMT_IS_VALID(fmt) (((fmt)->mode & 0x80000000) == 0)
struct audio_encoding_set;
extern int auconv_set_converter(const struct audio_format *, int,
int, const audio_params_t *, int,
stream_filter_list_t *);
extern int auconv_create_encodings(const struct audio_format *, int,
struct audio_encoding_set **);
extern int auconv_delete_encodings(struct audio_encoding_set *);
extern int auconv_query_encoding(const struct audio_encoding_set *,
audio_encoding_t *);
#endif /* !_SYS_DEV_AUCONV_H_ */