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| Current File : //sys/dev/sound/pcm/pcm.h |
/*-
* Copyright (c) 2006-2009 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.
*
* $FreeBSD: release/9.1.0/sys/dev/sound/pcm/pcm.h 193640 2009-06-07 19:12:08Z ariff $
*/
#ifndef _SND_PCM_H_
#define _SND_PCM_H_
#include <sys/param.h>
/*
* Macros for reading/writing PCM sample / int values from bytes array.
* Since every process is done using signed integer (and to make our life
* less miserable), unsigned sample will be converted to its signed
* counterpart and restored during writing back. To avoid overflow,
* we truncate 32bit (and only 32bit) samples down to 24bit (see below
* for the reason), unless SND_PCM_64 is defined.
*/
/*
* Automatically turn on 64bit arithmetic on suitable archs
* (amd64 64bit, ia64, etc..) for wider 32bit samples / integer processing.
*/
#if LONG_BIT >= 64
#undef SND_PCM_64
#define SND_PCM_64 1
#endif
typedef int32_t intpcm_t;
typedef int32_t intpcm8_t;
typedef int32_t intpcm16_t;
typedef int32_t intpcm24_t;
typedef uint32_t uintpcm_t;
typedef uint32_t uintpcm8_t;
typedef uint32_t uintpcm16_t;
typedef uint32_t uintpcm24_t;
#ifdef SND_PCM_64
typedef int64_t intpcm32_t;
typedef uint64_t uintpcm32_t;
#else
typedef int32_t intpcm32_t;
typedef uint32_t uintpcm32_t;
#endif
typedef int64_t intpcm64_t;
typedef uint64_t uintpcm64_t;
/* 32bit fixed point shift */
#define PCM_FXSHIFT 8
#define PCM_S8_MAX 0x7f
#define PCM_S8_MIN -0x80
#define PCM_S16_MAX 0x7fff
#define PCM_S16_MIN -0x8000
#define PCM_S24_MAX 0x7fffff
#define PCM_S24_MIN -0x800000
#ifdef SND_PCM_64
#if LONG_BIT >= 64
#define PCM_S32_MAX 0x7fffffffL
#define PCM_S32_MIN -0x80000000L
#else
#define PCM_S32_MAX 0x7fffffffLL
#define PCM_S32_MIN -0x80000000LL
#endif
#else
#define PCM_S32_MAX 0x7fffffff
#define PCM_S32_MIN (-0x7fffffff - 1)
#endif
/* Bytes-per-sample definition */
#define PCM_8_BPS 1
#define PCM_16_BPS 2
#define PCM_24_BPS 3
#define PCM_32_BPS 4
#define INTPCM_T(v) ((intpcm_t)(v))
#define INTPCM8_T(v) ((intpcm8_t)(v))
#define INTPCM16_T(v) ((intpcm16_t)(v))
#define INTPCM24_T(v) ((intpcm24_t)(v))
#define INTPCM32_T(v) ((intpcm32_t)(v))
#if BYTE_ORDER == LITTLE_ENDIAN
#define _PCM_READ_S16_LE(b8) INTPCM_T(*((int16_t *)(b8)))
#define _PCM_READ_S32_LE(b8) INTPCM_T(*((int32_t *)(b8)))
#define _PCM_READ_S16_BE(b8) \
INTPCM_T((b8)[1] | (((int8_t)((b8)[0])) << 8))
#define _PCM_READ_S32_BE(b8) \
INTPCM_T((b8)[3] | ((b8)[2] << 8) | ((b8)[1] << 16) | \
(((int8_t)((b8)[0])) << 24))
#define _PCM_WRITE_S16_LE(b8, val) do { \
*((int16_t *)(b8)) = (val); \
} while (0)
#define _PCM_WRITE_S32_LE(b8, val) do { \
*((int32_t *)(b8)) = (val); \
} while (0)
#define _PCM_WRITE_S16_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[1] = val; \
b8[0] = val >> 8; \
} while (0)
#define _PCM_WRITE_S32_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[3] = val; \
b8[2] = val >> 8; \
b8[1] = val >> 16; \
b8[0] = val >> 24; \
} while (0)
#define _PCM_READ_U16_LE(b8) \
INTPCM_T((int16_t)(*((uint16_t *)(b8)) ^ 0x8000))
#define _PCM_READ_U32_LE(b8) \
INTPCM_T((int32_t)(*((uint32_t *)(b8)) ^ 0x80000000))
#define _PCM_READ_U16_BE(b8) \
INTPCM_T((b8)[1] | (((int8_t)((b8)[0] ^ 0x80)) << 8))
#define _PCM_READ_U32_BE(b8) \
INTPCM_T((b8)[3] | ((b8)[2] << 8) | ((b8)[1] << 16) | \
(((int8_t)((b8)[0] ^ 0x80)) << 24))
#define _PCM_WRITE_U16_LE(b8, val) do { \
*((uint16_t *)(b8)) = (val) ^ 0x8000; \
} while (0)
#define _PCM_WRITE_U32_LE(b8, val) do { \
*((uint32_t *)(b8)) = (val) ^ 0x80000000; \
} while (0)
#define _PCM_WRITE_U16_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[1] = val; \
b8[0] = (val >> 8) ^ 0x80; \
} while (0)
#define _PCM_WRITE_U32_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[3] = val; \
b8[2] = val >> 8; \
b8[1] = val >> 16; \
b8[0] = (val >> 24) ^ 0x80; \
} while (0)
#define _PCM_READ_S16_NE(b8) _PCM_READ_S16_LE(b8)
#define _PCM_READ_U16_NE(b8) _PCM_READ_U16_LE(b8)
#define _PCM_READ_S32_NE(b8) _PCM_READ_S32_LE(b8)
#define _PCM_READ_U32_NE(b8) _PCM_READ_U32_LE(b8)
#define _PCM_WRITE_S16_NE(b6) _PCM_WRITE_S16_LE(b8)
#define _PCM_WRITE_U16_NE(b6) _PCM_WRITE_U16_LE(b8)
#define _PCM_WRITE_S32_NE(b6) _PCM_WRITE_S32_LE(b8)
#define _PCM_WRITE_U32_NE(b6) _PCM_WRITE_U32_LE(b8)
#else /* !LITTLE_ENDIAN */
#define _PCM_READ_S16_LE(b8) \
INTPCM_T((b8)[0] | (((int8_t)((b8)[1])) << 8))
#define _PCM_READ_S32_LE(b8) \
INTPCM_T((b8)[0] | ((b8)[1] << 8) | ((b8)[2] << 16) | \
(((int8_t)((b8)[3])) << 24))
#define _PCM_READ_S16_BE(b8) INTPCM_T(*((int16_t *)(b8)))
#define _PCM_READ_S32_BE(b8) INTPCM_T(*((int32_t *)(b8)))
#define _PCM_WRITE_S16_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = val >> 8; \
} while (0)
#define _PCM_WRITE_S32_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = val >> 8; \
b8[2] = val >> 16; \
b8[3] = val >> 24; \
} while (0)
#define _PCM_WRITE_S16_BE(b8, val) do { \
*((int16_t *)(b8)) = (val); \
} while (0)
#define _PCM_WRITE_S32_BE(b8, val) do { \
*((int32_t *)(b8)) = (val); \
} while (0)
#define _PCM_READ_U16_LE(b8) \
INTPCM_T((b8)[0] | (((int8_t)((b8)[1] ^ 0x80)) << 8))
#define _PCM_READ_U32_LE(b8) \
INTPCM_T((b8)[0] | ((b8)[1] << 8) | ((b8)[2] << 16) | \
(((int8_t)((b8)[3] ^ 0x80)) << 24))
#define _PCM_READ_U16_BE(b8) \
INTPCM_T((int16_t)(*((uint16_t *)(b8)) ^ 0x8000))
#define _PCM_READ_U32_BE(b8) \
INTPCM_T((int32_t)(*((uint32_t *)(b8)) ^ 0x80000000))
#define _PCM_WRITE_U16_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = (val >> 8) ^ 0x80; \
} while (0)
#define _PCM_WRITE_U32_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = val >> 8; \
b8[2] = val >> 16; \
b8[3] = (val >> 24) ^ 0x80; \
} while (0)
#define _PCM_WRITE_U16_BE(b8, val) do { \
*((uint16_t *)(b8)) = (val) ^ 0x8000; \
} while (0)
#define _PCM_WRITE_U32_BE(b8, val) do { \
*((uint32_t *)(b8)) = (val) ^ 0x80000000; \
} while (0)
#define _PCM_READ_S16_NE(b8) _PCM_READ_S16_BE(b8)
#define _PCM_READ_U16_NE(b8) _PCM_READ_U16_BE(b8)
#define _PCM_READ_S32_NE(b8) _PCM_READ_S32_BE(b8)
#define _PCM_READ_U32_NE(b8) _PCM_READ_U32_BE(b8)
#define _PCM_WRITE_S16_NE(b6) _PCM_WRITE_S16_BE(b8)
#define _PCM_WRITE_U16_NE(b6) _PCM_WRITE_U16_BE(b8)
#define _PCM_WRITE_S32_NE(b6) _PCM_WRITE_S32_BE(b8)
#define _PCM_WRITE_U32_NE(b6) _PCM_WRITE_U32_BE(b8)
#endif /* LITTLE_ENDIAN */
#define _PCM_READ_S24_LE(b8) \
INTPCM_T((b8)[0] | ((b8)[1] << 8) | (((int8_t)((b8)[2])) << 16))
#define _PCM_READ_S24_BE(b8) \
INTPCM_T((b8)[2] | ((b8)[1] << 8) | (((int8_t)((b8)[0])) << 16))
#define _PCM_WRITE_S24_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = val >> 8; \
b8[2] = val >> 16; \
} while (0)
#define _PCM_WRITE_S24_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[2] = val; \
b8[1] = val >> 8; \
b8[0] = val >> 16; \
} while (0)
#define _PCM_READ_U24_LE(b8) \
INTPCM_T((b8)[0] | ((b8)[1] << 8) | \
(((int8_t)((b8)[2] ^ 0x80)) << 16))
#define _PCM_READ_U24_BE(b8) \
INTPCM_T((b8)[2] | ((b8)[1] << 8) | \
(((int8_t)((b8)[0] ^ 0x80)) << 16))
#define _PCM_WRITE_U24_LE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[0] = val; \
b8[1] = val >> 8; \
b8[2] = (val >> 16) ^ 0x80; \
} while (0)
#define _PCM_WRITE_U24_BE(bb8, vval) do { \
intpcm_t val = (vval); \
uint8_t *b8 = (bb8); \
b8[2] = val; \
b8[1] = val >> 8; \
b8[0] = (val >> 16) ^ 0x80; \
} while (0)
#if BYTE_ORDER == LITTLE_ENDIAN
#define _PCM_READ_S24_NE(b8) _PCM_READ_S24_LE(b8)
#define _PCM_READ_U24_NE(b8) _PCM_READ_U24_LE(b8)
#define _PCM_WRITE_S24_NE(b6) _PCM_WRITE_S24_LE(b8)
#define _PCM_WRITE_U24_NE(b6) _PCM_WRITE_U24_LE(b8)
#else /* !LITTLE_ENDIAN */
#define _PCM_READ_S24_NE(b8) _PCM_READ_S24_BE(b8)
#define _PCM_READ_U24_NE(b8) _PCM_READ_U24_BE(b8)
#define _PCM_WRITE_S24_NE(b6) _PCM_WRITE_S24_BE(b8)
#define _PCM_WRITE_U24_NE(b6) _PCM_WRITE_U24_BE(b8)
#endif /* LITTLE_ENDIAN */
/*
* 8bit sample is pretty much useless since it doesn't provide
* sufficient dynamic range throughout our filtering process.
* For the sake of completeness, declare it anyway.
*/
#define _PCM_READ_S8_NE(b8) INTPCM_T(*((int8_t *)(b8)))
#define _PCM_READ_U8_NE(b8) \
INTPCM_T((int8_t)(*((uint8_t *)(b8)) ^ 0x80))
#define _PCM_WRITE_S8_NE(b8, val) do { \
*((int8_t *)(b8)) = (val); \
} while (0)
#define _PCM_WRITE_U8_NE(b8, val) do { \
*((uint8_t *)(b8)) = (val) ^ 0x80; \
} while (0)
/*
* Common macross. Use this instead of "_", unless we want
* the real sample value.
*/
/* 8bit */
#define PCM_READ_S8_NE(b8) _PCM_READ_S8_NE(b8)
#define PCM_READ_U8_NE(b8) _PCM_READ_U8_NE(b8)
#define PCM_WRITE_S8_NE(b8, val) _PCM_WRITE_S8_NE(b8, val)
#define PCM_WRITE_U8_NE(b8, val) _PCM_WRITE_U8_NE(b8, val)
/* 16bit */
#define PCM_READ_S16_LE(b8) _PCM_READ_S16_LE(b8)
#define PCM_READ_S16_BE(b8) _PCM_READ_S16_BE(b8)
#define PCM_READ_U16_LE(b8) _PCM_READ_U16_LE(b8)
#define PCM_READ_U16_BE(b8) _PCM_READ_U16_BE(b8)
#define PCM_WRITE_S16_LE(b8, val) _PCM_WRITE_S16_LE(b8, val)
#define PCM_WRITE_S16_BE(b8, val) _PCM_WRITE_S16_BE(b8, val)
#define PCM_WRITE_U16_LE(b8, val) _PCM_WRITE_U16_LE(b8, val)
#define PCM_WRITE_U16_BE(b8, val) _PCM_WRITE_U16_BE(b8, val)
#define PCM_READ_S16_NE(b8) _PCM_READ_S16_NE(b8)
#define PCM_READ_U16_NE(b8) _PCM_READ_U16_NE(b8)
#define PCM_WRITE_S16_NE(b8) _PCM_WRITE_S16_NE(b8)
#define PCM_WRITE_U16_NE(b8) _PCM_WRITE_U16_NE(b8)
/* 24bit */
#define PCM_READ_S24_LE(b8) _PCM_READ_S24_LE(b8)
#define PCM_READ_S24_BE(b8) _PCM_READ_S24_BE(b8)
#define PCM_READ_U24_LE(b8) _PCM_READ_U24_LE(b8)
#define PCM_READ_U24_BE(b8) _PCM_READ_U24_BE(b8)
#define PCM_WRITE_S24_LE(b8, val) _PCM_WRITE_S24_LE(b8, val)
#define PCM_WRITE_S24_BE(b8, val) _PCM_WRITE_S24_BE(b8, val)
#define PCM_WRITE_U24_LE(b8, val) _PCM_WRITE_U24_LE(b8, val)
#define PCM_WRITE_U24_BE(b8, val) _PCM_WRITE_U24_BE(b8, val)
#define PCM_READ_S24_NE(b8) _PCM_READ_S24_NE(b8)
#define PCM_READ_U24_NE(b8) _PCM_READ_U24_NE(b8)
#define PCM_WRITE_S24_NE(b8) _PCM_WRITE_S24_NE(b8)
#define PCM_WRITE_U24_NE(b8) _PCM_WRITE_U24_NE(b8)
/* 32bit */
#ifdef SND_PCM_64
#define PCM_READ_S32_LE(b8) _PCM_READ_S32_LE(b8)
#define PCM_READ_S32_BE(b8) _PCM_READ_S32_BE(b8)
#define PCM_READ_U32_LE(b8) _PCM_READ_U32_LE(b8)
#define PCM_READ_U32_BE(b8) _PCM_READ_U32_BE(b8)
#define PCM_WRITE_S32_LE(b8, val) _PCM_WRITE_S32_LE(b8, val)
#define PCM_WRITE_S32_BE(b8, val) _PCM_WRITE_S32_BE(b8, val)
#define PCM_WRITE_U32_LE(b8, val) _PCM_WRITE_U32_LE(b8, val)
#define PCM_WRITE_U32_BE(b8, val) _PCM_WRITE_U32_BE(b8, val)
#define PCM_READ_S32_NE(b8) _PCM_READ_S32_NE(b8)
#define PCM_READ_U32_NE(b8) _PCM_READ_U32_NE(b8)
#define PCM_WRITE_S32_NE(b8) _PCM_WRITE_S32_NE(b8)
#define PCM_WRITE_U32_NE(b8) _PCM_WRITE_U32_NE(b8)
#else /* !SND_PCM_64 */
/*
* 24bit integer ?!? This is quite unfortunate, eh? Get the fact straight:
* Dynamic range for:
* 1) Human =~ 140db
* 2) 16bit = 96db (close enough)
* 3) 24bit = 144db (perfect)
* 4) 32bit = 196db (way too much)
* 5) Bugs Bunny = Gazillion!@%$Erbzzztt-EINVAL db
* Since we're not Bugs Bunny ..uh..err.. avoiding 64bit arithmetic, 24bit
* is pretty much sufficient for our signed integer processing.
*/
#define PCM_READ_S32_LE(b8) (_PCM_READ_S32_LE(b8) >> PCM_FXSHIFT)
#define PCM_READ_S32_BE(b8) (_PCM_READ_S32_BE(b8) >> PCM_FXSHIFT)
#define PCM_READ_U32_LE(b8) (_PCM_READ_U32_LE(b8) >> PCM_FXSHIFT)
#define PCM_READ_U32_BE(b8) (_PCM_READ_U32_BE(b8) >> PCM_FXSHIFT)
#define PCM_READ_S32_NE(b8) (_PCM_READ_S32_NE(b8) >> PCM_FXSHIFT)
#define PCM_READ_U32_NE(b8) (_PCM_READ_U32_NE(b8) >> PCM_FXSHIFT)
#define PCM_WRITE_S32_LE(b8, val) \
_PCM_WRITE_S32_LE(b8, (val) << PCM_FXSHIFT)
#define PCM_WRITE_S32_BE(b8, val) \
_PCM_WRITE_S32_BE(b8, (val) << PCM_FXSHIFT)
#define PCM_WRITE_U32_LE(b8, val) \
_PCM_WRITE_U32_LE(b8, (val) << PCM_FXSHIFT)
#define PCM_WRITE_U32_BE(b8, val) \
_PCM_WRITE_U32_BE(b8, (val) << PCM_FXSHIFT)
#define PCM_WRITE_S32_NE(b8, val) \
_PCM_WRITE_S32_NE(b8, (val) << PCM_FXSHIFT)
#define PCM_WRITE_U32_NE(b8, val) \
_PCM_WRITE_U32_NE(b8, (val) << PCM_FXSHIFT)
#endif /* SND_PCM_64 */
#define PCM_CLAMP_S8(val) \
(((val) > PCM_S8_MAX) ? PCM_S8_MAX : \
(((val) < PCM_S8_MIN) ? PCM_S8_MIN : (val)))
#define PCM_CLAMP_S16(val) \
(((val) > PCM_S16_MAX) ? PCM_S16_MAX : \
(((val) < PCM_S16_MIN) ? PCM_S16_MIN : (val)))
#define PCM_CLAMP_S24(val) \
(((val) > PCM_S24_MAX) ? PCM_S24_MAX : \
(((val) < PCM_S24_MIN) ? PCM_S24_MIN : (val)))
#ifdef SND_PCM_64
#define PCM_CLAMP_S32(val) \
(((val) > PCM_S32_MAX) ? PCM_S32_MAX : \
(((val) < PCM_S32_MIN) ? PCM_S32_MIN : (val)))
#else /* !SND_PCM_64 */
#define PCM_CLAMP_S32(val) \
(((val) > PCM_S24_MAX) ? PCM_S32_MAX : \
(((val) < PCM_S24_MIN) ? PCM_S32_MIN : \
((val) << PCM_FXSHIFT)))
#endif /* SND_PCM_64 */
#define PCM_CLAMP_U8(val) PCM_CLAMP_S8(val)
#define PCM_CLAMP_U16(val) PCM_CLAMP_S16(val)
#define PCM_CLAMP_U24(val) PCM_CLAMP_S24(val)
#define PCM_CLAMP_U32(val) PCM_CLAMP_S32(val)
#endif /* !_SND_PCM_H_ */