293263c352
Within the libjpeg API code, it seems to be more the convention than not to separate the macro name and value by two or more spaces, which improves general readability. Making this consistent across all of libjpeg-turbo is less about my individual preferences and more about making it easy to automatically detect variations from our chosen formatting convention. I intend to release the script I'm using to validate this stuff, once it matures and stabilizes a bit.
846 lines
18 KiB
C
846 lines
18 KiB
C
/*
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* jsimd_powerpc.c
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*
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* Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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* Copyright (C) 2009-2011, 2014-2016, 2018, D. R. Commander.
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* Copyright (C) 2015, Matthieu Darbois.
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*
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* Based on the x86 SIMD extension for IJG JPEG library,
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* Copyright (C) 1999-2006, MIYASAKA Masaru.
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* For conditions of distribution and use, see copyright notice in jsimdext.inc
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*
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* This file contains the interface between the "normal" portions
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* of the library and the SIMD implementations when running on a
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* PowerPC architecture.
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*/
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#ifdef __amigaos4__
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/* This must be defined first as it re-defines GLOBAL otherwise */
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#include <proto/exec.h>
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#endif
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#define JPEG_INTERNALS
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#include "../../jinclude.h"
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#include "../../jpeglib.h"
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#include "../../jsimd.h"
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#include "../../jdct.h"
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#include "../../jsimddct.h"
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#include "../jsimd.h"
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#if defined(__OpenBSD__)
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <machine/cpu.h>
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#endif
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static unsigned int simd_support = ~0;
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#if defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
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#define SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT (1024 * 1024)
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LOCAL(int)
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check_feature(char *buffer, char *feature)
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{
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char *p;
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if (*feature == 0)
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return 0;
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if (strncmp(buffer, "cpu", 3) != 0)
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return 0;
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buffer += 3;
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while (isspace(*buffer))
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buffer++;
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/* Check if 'feature' is present in the buffer as a separate word */
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while ((p = strstr(buffer, feature))) {
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if (p > buffer && !isspace(*(p - 1))) {
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buffer++;
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continue;
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}
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p += strlen(feature);
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if (*p != 0 && !isspace(*p)) {
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buffer++;
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continue;
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}
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return 1;
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}
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return 0;
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}
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LOCAL(int)
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parse_proc_cpuinfo(int bufsize)
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{
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char *buffer = (char *)malloc(bufsize);
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FILE *fd;
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simd_support = 0;
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if (!buffer)
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return 0;
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fd = fopen("/proc/cpuinfo", "r");
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if (fd) {
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while (fgets(buffer, bufsize, fd)) {
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if (!strchr(buffer, '\n') && !feof(fd)) {
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/* "impossible" happened - insufficient size of the buffer! */
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fclose(fd);
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free(buffer);
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return 0;
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}
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if (check_feature(buffer, "altivec"))
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simd_support |= JSIMD_ALTIVEC;
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}
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fclose(fd);
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}
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free(buffer);
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return 1;
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}
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#endif
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/*
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* Check what SIMD accelerations are supported.
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*
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* FIXME: This code is racy under a multi-threaded environment.
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*/
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LOCAL(void)
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init_simd(void)
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{
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#ifndef NO_GETENV
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char *env = NULL;
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#endif
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#if !defined(__ALTIVEC__) && (defined(__linux__) || defined(ANDROID) || defined(__ANDROID__))
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int bufsize = 1024; /* an initial guess for the line buffer size limit */
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#elif defined(__amigaos4__)
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uint32 altivec = 0;
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#elif defined(__OpenBSD__)
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int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
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int altivec;
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size_t len = sizeof(altivec);
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#endif
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if (simd_support != ~0U)
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return;
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simd_support = 0;
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#if defined(__ALTIVEC__) || defined(__APPLE__)
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simd_support |= JSIMD_ALTIVEC;
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#elif defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
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while (!parse_proc_cpuinfo(bufsize)) {
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bufsize *= 2;
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if (bufsize > SOMEWHAT_SANE_PROC_CPUINFO_SIZE_LIMIT)
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break;
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}
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#elif defined(__amigaos4__)
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IExec->GetCPUInfoTags(GCIT_VectorUnit, &altivec, TAG_DONE);
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if (altivec == VECTORTYPE_ALTIVEC)
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simd_support |= JSIMD_ALTIVEC;
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#elif defined(__OpenBSD__)
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if (sysctl(mib, 2, &altivec, &len, NULL, 0) == 0 && altivec != 0)
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simd_support |= JSIMD_ALTIVEC;
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#endif
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#ifndef NO_GETENV
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/* Force different settings through environment variables */
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env = getenv("JSIMD_FORCEALTIVEC");
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if ((env != NULL) && (strcmp(env, "1") == 0))
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simd_support = JSIMD_ALTIVEC;
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env = getenv("JSIMD_FORCENONE");
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if ((env != NULL) && (strcmp(env, "1") == 0))
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simd_support = 0;
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#endif
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}
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GLOBAL(int)
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jsimd_can_rgb_ycc(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_rgb_gray(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_ycc_rgb(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if ((RGB_PIXELSIZE != 3) && (RGB_PIXELSIZE != 4))
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_ycc_rgb565(void)
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{
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return 0;
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}
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GLOBAL(void)
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jsimd_rgb_ycc_convert(j_compress_ptr cinfo, JSAMPARRAY input_buf,
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JSAMPIMAGE output_buf, JDIMENSION output_row,
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int num_rows)
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{
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void (*altivecfct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
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switch (cinfo->in_color_space) {
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case JCS_EXT_RGB:
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altivecfct = jsimd_extrgb_ycc_convert_altivec;
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break;
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case JCS_EXT_RGBX:
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case JCS_EXT_RGBA:
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altivecfct = jsimd_extrgbx_ycc_convert_altivec;
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break;
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case JCS_EXT_BGR:
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altivecfct = jsimd_extbgr_ycc_convert_altivec;
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break;
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case JCS_EXT_BGRX:
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case JCS_EXT_BGRA:
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altivecfct = jsimd_extbgrx_ycc_convert_altivec;
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break;
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case JCS_EXT_XBGR:
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case JCS_EXT_ABGR:
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altivecfct = jsimd_extxbgr_ycc_convert_altivec;
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break;
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case JCS_EXT_XRGB:
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case JCS_EXT_ARGB:
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altivecfct = jsimd_extxrgb_ycc_convert_altivec;
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break;
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default:
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altivecfct = jsimd_rgb_ycc_convert_altivec;
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break;
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}
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altivecfct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
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}
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GLOBAL(void)
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jsimd_rgb_gray_convert(j_compress_ptr cinfo, JSAMPARRAY input_buf,
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JSAMPIMAGE output_buf, JDIMENSION output_row,
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int num_rows)
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{
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void (*altivecfct) (JDIMENSION, JSAMPARRAY, JSAMPIMAGE, JDIMENSION, int);
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switch (cinfo->in_color_space) {
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case JCS_EXT_RGB:
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altivecfct = jsimd_extrgb_gray_convert_altivec;
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break;
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case JCS_EXT_RGBX:
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case JCS_EXT_RGBA:
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altivecfct = jsimd_extrgbx_gray_convert_altivec;
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break;
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case JCS_EXT_BGR:
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altivecfct = jsimd_extbgr_gray_convert_altivec;
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break;
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case JCS_EXT_BGRX:
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case JCS_EXT_BGRA:
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altivecfct = jsimd_extbgrx_gray_convert_altivec;
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break;
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case JCS_EXT_XBGR:
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case JCS_EXT_ABGR:
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altivecfct = jsimd_extxbgr_gray_convert_altivec;
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break;
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case JCS_EXT_XRGB:
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case JCS_EXT_ARGB:
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altivecfct = jsimd_extxrgb_gray_convert_altivec;
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break;
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default:
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altivecfct = jsimd_rgb_gray_convert_altivec;
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break;
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}
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altivecfct(cinfo->image_width, input_buf, output_buf, output_row, num_rows);
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}
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GLOBAL(void)
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jsimd_ycc_rgb_convert(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY, int);
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switch (cinfo->out_color_space) {
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case JCS_EXT_RGB:
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altivecfct = jsimd_ycc_extrgb_convert_altivec;
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break;
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case JCS_EXT_RGBX:
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case JCS_EXT_RGBA:
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altivecfct = jsimd_ycc_extrgbx_convert_altivec;
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break;
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case JCS_EXT_BGR:
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altivecfct = jsimd_ycc_extbgr_convert_altivec;
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break;
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case JCS_EXT_BGRX:
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case JCS_EXT_BGRA:
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altivecfct = jsimd_ycc_extbgrx_convert_altivec;
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break;
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case JCS_EXT_XBGR:
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case JCS_EXT_ABGR:
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altivecfct = jsimd_ycc_extxbgr_convert_altivec;
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break;
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case JCS_EXT_XRGB:
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case JCS_EXT_ARGB:
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altivecfct = jsimd_ycc_extxrgb_convert_altivec;
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break;
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default:
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altivecfct = jsimd_ycc_rgb_convert_altivec;
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break;
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}
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altivecfct(cinfo->output_width, input_buf, input_row, output_buf, num_rows);
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}
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GLOBAL(void)
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jsimd_ycc_rgb565_convert(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
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JDIMENSION input_row, JSAMPARRAY output_buf,
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int num_rows)
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{
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}
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GLOBAL(int)
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jsimd_can_h2v2_downsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_h2v1_downsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(void)
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jsimd_h2v2_downsample(j_compress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY output_data)
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{
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jsimd_h2v2_downsample_altivec(cinfo->image_width, cinfo->max_v_samp_factor,
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compptr->v_samp_factor,
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compptr->width_in_blocks, input_data,
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output_data);
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}
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GLOBAL(void)
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jsimd_h2v1_downsample(j_compress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY output_data)
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{
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jsimd_h2v1_downsample_altivec(cinfo->image_width, cinfo->max_v_samp_factor,
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compptr->v_samp_factor,
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compptr->width_in_blocks, input_data,
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output_data);
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}
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GLOBAL(int)
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jsimd_can_h2v2_upsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_h2v1_upsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(void)
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jsimd_h2v2_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
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{
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jsimd_h2v2_upsample_altivec(cinfo->max_v_samp_factor, cinfo->output_width,
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input_data, output_data_ptr);
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}
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GLOBAL(void)
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jsimd_h2v1_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
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{
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jsimd_h2v1_upsample_altivec(cinfo->max_v_samp_factor, cinfo->output_width,
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input_data, output_data_ptr);
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}
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GLOBAL(int)
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jsimd_can_h2v2_fancy_upsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_h2v1_fancy_upsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(void)
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jsimd_h2v2_fancy_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
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{
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jsimd_h2v2_fancy_upsample_altivec(cinfo->max_v_samp_factor,
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compptr->downsampled_width, input_data,
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output_data_ptr);
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}
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GLOBAL(void)
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jsimd_h2v1_fancy_upsample(j_decompress_ptr cinfo, jpeg_component_info *compptr,
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JSAMPARRAY input_data, JSAMPARRAY *output_data_ptr)
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{
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jsimd_h2v1_fancy_upsample_altivec(cinfo->max_v_samp_factor,
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compptr->downsampled_width, input_data,
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output_data_ptr);
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}
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GLOBAL(int)
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jsimd_can_h2v2_merged_upsample(void)
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{
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init_simd();
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/* The code is optimised for these values only */
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if (BITS_IN_JSAMPLE != 8)
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return 0;
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if (sizeof(JDIMENSION) != 4)
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return 0;
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if (simd_support & JSIMD_ALTIVEC)
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return 1;
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return 0;
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}
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GLOBAL(int)
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jsimd_can_h2v1_merged_upsample(void)
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{
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init_simd();
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|
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/* The code is optimised for these values only */
|
|
if (BITS_IN_JSAMPLE != 8)
|
|
return 0;
|
|
if (sizeof(JDIMENSION) != 4)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_h2v2_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
|
|
JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
|
|
{
|
|
void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
|
|
|
|
switch (cinfo->out_color_space) {
|
|
case JCS_EXT_RGB:
|
|
altivecfct = jsimd_h2v2_extrgb_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_RGBX:
|
|
case JCS_EXT_RGBA:
|
|
altivecfct = jsimd_h2v2_extrgbx_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_BGR:
|
|
altivecfct = jsimd_h2v2_extbgr_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_BGRX:
|
|
case JCS_EXT_BGRA:
|
|
altivecfct = jsimd_h2v2_extbgrx_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_XBGR:
|
|
case JCS_EXT_ABGR:
|
|
altivecfct = jsimd_h2v2_extxbgr_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_XRGB:
|
|
case JCS_EXT_ARGB:
|
|
altivecfct = jsimd_h2v2_extxrgb_merged_upsample_altivec;
|
|
break;
|
|
default:
|
|
altivecfct = jsimd_h2v2_merged_upsample_altivec;
|
|
break;
|
|
}
|
|
|
|
altivecfct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_h2v1_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
|
|
JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
|
|
{
|
|
void (*altivecfct) (JDIMENSION, JSAMPIMAGE, JDIMENSION, JSAMPARRAY);
|
|
|
|
switch (cinfo->out_color_space) {
|
|
case JCS_EXT_RGB:
|
|
altivecfct = jsimd_h2v1_extrgb_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_RGBX:
|
|
case JCS_EXT_RGBA:
|
|
altivecfct = jsimd_h2v1_extrgbx_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_BGR:
|
|
altivecfct = jsimd_h2v1_extbgr_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_BGRX:
|
|
case JCS_EXT_BGRA:
|
|
altivecfct = jsimd_h2v1_extbgrx_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_XBGR:
|
|
case JCS_EXT_ABGR:
|
|
altivecfct = jsimd_h2v1_extxbgr_merged_upsample_altivec;
|
|
break;
|
|
case JCS_EXT_XRGB:
|
|
case JCS_EXT_ARGB:
|
|
altivecfct = jsimd_h2v1_extxrgb_merged_upsample_altivec;
|
|
break;
|
|
default:
|
|
altivecfct = jsimd_h2v1_merged_upsample_altivec;
|
|
break;
|
|
}
|
|
|
|
altivecfct(cinfo->output_width, input_buf, in_row_group_ctr, output_buf);
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_convsamp(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (BITS_IN_JSAMPLE != 8)
|
|
return 0;
|
|
if (sizeof(JDIMENSION) != 4)
|
|
return 0;
|
|
if (sizeof(DCTELEM) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_convsamp_float(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_convsamp(JSAMPARRAY sample_data, JDIMENSION start_col,
|
|
DCTELEM *workspace)
|
|
{
|
|
jsimd_convsamp_altivec(sample_data, start_col, workspace);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_convsamp_float(JSAMPARRAY sample_data, JDIMENSION start_col,
|
|
FAST_FLOAT *workspace)
|
|
{
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_fdct_islow(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (sizeof(DCTELEM) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_fdct_ifast(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (sizeof(DCTELEM) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_fdct_float(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_fdct_islow(DCTELEM *data)
|
|
{
|
|
jsimd_fdct_islow_altivec(data);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_fdct_ifast(DCTELEM *data)
|
|
{
|
|
jsimd_fdct_ifast_altivec(data);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_fdct_float(FAST_FLOAT *data)
|
|
{
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_quantize(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (sizeof(JCOEF) != 2)
|
|
return 0;
|
|
if (sizeof(DCTELEM) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_quantize_float(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_quantize(JCOEFPTR coef_block, DCTELEM *divisors, DCTELEM *workspace)
|
|
{
|
|
jsimd_quantize_altivec(coef_block, divisors, workspace);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_quantize_float(JCOEFPTR coef_block, FAST_FLOAT *divisors,
|
|
FAST_FLOAT *workspace)
|
|
{
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_idct_2x2(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_idct_4x4(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_idct_2x2(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_idct_4x4(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_idct_islow(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (sizeof(JCOEF) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_idct_ifast(void)
|
|
{
|
|
init_simd();
|
|
|
|
/* The code is optimised for these values only */
|
|
if (DCTSIZE != 8)
|
|
return 0;
|
|
if (sizeof(JCOEF) != 2)
|
|
return 0;
|
|
|
|
if (simd_support & JSIMD_ALTIVEC)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_idct_float(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_idct_islow(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
jsimd_idct_islow_altivec(compptr->dct_table, coef_block, output_buf,
|
|
output_col);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_idct_ifast(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
jsimd_idct_ifast_altivec(compptr->dct_table, coef_block, output_buf,
|
|
output_col);
|
|
}
|
|
|
|
GLOBAL(void)
|
|
jsimd_idct_float(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
|
JDIMENSION output_col)
|
|
{
|
|
}
|
|
|
|
GLOBAL(int)
|
|
jsimd_can_huff_encode_one_block(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
GLOBAL(JOCTET *)
|
|
jsimd_huff_encode_one_block(void *state, JOCTET *buffer, JCOEFPTR block,
|
|
int last_dc_val, c_derived_tbl *dctbl,
|
|
c_derived_tbl *actbl)
|
|
{
|
|
return NULL;
|
|
}
|