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