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/*
* ac.h -- main aclib include
* Written by Andrew Church <achurch@achurch.org>
*
* This file is part of transcode, a video stream processing tool.
* transcode is free software, distributable under the terms of the GNU
* General Public License (version 2 or later). See the file COPYING
* for details.
*/
#ifndef ACLIB_AC_H
#define ACLIB_AC_H
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
/*************************************************************************/
/* CPU acceleration support flags, for use with ac_init(): */
#define AC_IA32ASM 0x0001 /* x86-32: standard assembly (no MMX) */
#define AC_AMD64ASM 0x0002 /* x86-64: standard assembly (no MMX) */
#define AC_CMOVE 0x0004 /* x86: CMOVcc instruction */
#define AC_MMX 0x0008 /* x86: MMX instructions */
#define AC_MMXEXT 0x0010 /* x86: MMX extended instructions (AMD) */
#define AC_3DNOW 0x0020 /* x86: 3DNow! instructions (AMD) */
#define AC_3DNOWEXT 0x0040 /* x86: 3DNow! instructions (AMD) */
#define AC_SSE 0x0080 /* x86: SSE instructions */
#define AC_SSE2 0x0100 /* x86: SSE2 instructions */
#define AC_SSE3 0x0200 /* x86: SSE3 instructions */
#define AC_SSSE3 0x0400 /* x86: SSSE3 instructions */
#define AC_SSE41 0x0800 /* x86: SSE4.1 instructions */
#define AC_SSE42 0x1000 /* x86: SSE4.2 instructions (Intel) */
#define AC_SSE4A 0x2000 /* x86: SSE4a instructions (AMD) */
#define AC_SSE5 0x4000 /* x86: SSE5 instructions (AMD) */
#define AC_NONE 0 /* No acceleration (vanilla C functions) */
#define AC_ALL (~0) /* All available acceleration */
/* Endianness flag: */
#define AC_LITTLE_ENDIAN 1
#define AC_BIG_ENDIAN 2
/*************************************************************************/
/* Library initialization function--MUST be called before any other aclib
* functions are used! `accel' selects the accelerations to enable:
* AC_NONE, AC_ALL, or a combination of the other AC_* flags above. The
* value will always be masked to the acceleration options available on the
* actual CPU, as returned by ac_cpuinfo(). Returns 1 on success, 0 on
* failure. This function can be called multiple times to change the set
* of acceleration features to be used. */
extern int ac_init(int accel);
/* Returns the set of acceleration features supported by this CPU. */
extern int ac_cpuinfo(void);
/* Returns the endianness of this CPU (AC_BIG_ENDIAN or AC_LITTLE_ENDIAN). */
extern int ac_endian(void);
/* Utility routine to convert a set of flags to a descriptive string. The
* string is stored in a static buffer overwritten each call. */
extern const char *ac_flagstotext(int accel);
/* Utility routine to parse a comma-separate descriptive string to the
corrisponding flag. The reverse of ac_flagstotext.
Returns 1 on success, 0 on failure */
extern int ac_parseflags(const char *text, int *accel);
/*************************************************************************/
/* Acceleration-enabled functions: */
/* Optimized memcpy(). The copy direction is guaranteed to be ascending
* (so ac_memcpy(ptr, ptr+1, size) will work). */
extern void *ac_memcpy(void *dest, const void *src, size_t size);
/* Average of two sets of data */
extern void ac_average(const uint8_t *src1, const uint8_t *src2,
uint8_t *dest, int bytes);
/* Weighted average of two sets of data (weight1+weight2 should be 65536) */
extern void ac_rescale(const uint8_t *src1, const uint8_t *src2,
uint8_t *dest, int bytes,
uint32_t weight1, uint32_t weight2);
/* Image format manipulation is available in aclib/imgconvert.h */
/*************************************************************************/
#endif /* ACLIB_AC_H */
/*
* Local variables:
* c-file-style: "stroustrup"
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/
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