722 lines
15 KiB
C
722 lines
15 KiB
C
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/*
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* jsimd_arm.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) 2011, Nokia Corporation and/or its subsidiary(-ies).
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* Copyright (C) 2009-2011, 2013-2014, 2016, 2018, D. R. Commander.
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* Copyright (C) 2015-2016, 2018, Matthieu Darbois.
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* Copyright (C) 2019, Google LLC.
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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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* 32-bit ARM architecture.
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*/
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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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static unsigned int simd_support = ~0;
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static unsigned int simd_huffman = 1;
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#if !defined(__ARM_NEON__) && (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, "Features", 8) != 0)
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return 0;
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buffer += 8;
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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, "neon"))
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simd_support |= JSIMD_NEON;
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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(__ARM_NEON__) && (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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#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(__ARM_NEON__)
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simd_support |= JSIMD_NEON;
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#elif defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
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/* We still have a chance to use NEON regardless of globally used
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* -mcpu/-mfpu options passed to gcc by performing runtime detection via
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* /proc/cpuinfo parsing on linux/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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#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_FORCENEON");
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if ((env != NULL) && (strcmp(env, "1") == 0))
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simd_support = JSIMD_NEON;
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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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env = getenv("JSIMD_NOHUFFENC");
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if ((env != NULL) && (strcmp(env, "1") == 0))
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simd_huffman = 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_NEON)
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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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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_NEON)
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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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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_NEON)
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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_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 (*neonfct) (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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neonfct = jsimd_extrgb_ycc_convert_neon;
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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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neonfct = jsimd_extrgbx_ycc_convert_neon;
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break;
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case JCS_EXT_BGR:
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neonfct = jsimd_extbgr_ycc_convert_neon;
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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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neonfct = jsimd_extbgrx_ycc_convert_neon;
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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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neonfct = jsimd_extxbgr_ycc_convert_neon;
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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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neonfct = jsimd_extxrgb_ycc_convert_neon;
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break;
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default:
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neonfct = jsimd_extrgb_ycc_convert_neon;
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break;
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}
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neonfct(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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}
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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 (*neonfct) (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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neonfct = jsimd_ycc_extrgb_convert_neon;
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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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neonfct = jsimd_ycc_extrgbx_convert_neon;
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break;
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case JCS_EXT_BGR:
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neonfct = jsimd_ycc_extbgr_convert_neon;
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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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neonfct = jsimd_ycc_extbgrx_convert_neon;
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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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neonfct = jsimd_ycc_extxbgr_convert_neon;
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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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neonfct = jsimd_ycc_extxrgb_convert_neon;
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break;
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default:
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neonfct = jsimd_ycc_extrgb_convert_neon;
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break;
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}
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neonfct(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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jsimd_ycc_rgb565_convert_neon(cinfo->output_width, input_buf, input_row,
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output_buf, num_rows);
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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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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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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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}
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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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}
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GLOBAL(int)
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jsimd_can_h2v2_upsample(void)
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{
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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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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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}
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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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}
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GLOBAL(int)
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jsimd_can_h2v2_fancy_upsample(void)
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{
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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_NEON)
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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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}
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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_neon(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)
|
||
|
|
jsimd_can_h2v2_merged_upsample(void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_can_h2v1_merged_upsample(void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_h2v2_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
|
||
|
|
JDIMENSION in_row_group_ctr, JSAMPARRAY output_buf)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_h2v1_merged_upsample(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
|
||
|
|
JDIMENSION in_row_group_ctr, JSAMPARRAY 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_NEON)
|
||
|
|
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_neon(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)
|
||
|
|
{
|
||
|
|
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_NEON)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_can_fdct_float(void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_fdct_islow(DCTELEM *data)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_fdct_ifast(DCTELEM *data)
|
||
|
|
{
|
||
|
|
jsimd_fdct_ifast_neon(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_NEON)
|
||
|
|
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_neon(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)
|
||
|
|
{
|
||
|
|
init_simd();
|
||
|
|
|
||
|
|
/* The code is optimised for these values only */
|
||
|
|
if (DCTSIZE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JCOEF) != 2)
|
||
|
|
return 0;
|
||
|
|
if (BITS_IN_JSAMPLE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JDIMENSION) != 4)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(ISLOW_MULT_TYPE) != 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (simd_support & JSIMD_NEON)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_can_idct_4x4(void)
|
||
|
|
{
|
||
|
|
init_simd();
|
||
|
|
|
||
|
|
/* The code is optimised for these values only */
|
||
|
|
if (DCTSIZE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JCOEF) != 2)
|
||
|
|
return 0;
|
||
|
|
if (BITS_IN_JSAMPLE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JDIMENSION) != 4)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(ISLOW_MULT_TYPE) != 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (simd_support & JSIMD_NEON)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_idct_2x2(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
||
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
||
|
|
JDIMENSION output_col)
|
||
|
|
{
|
||
|
|
jsimd_idct_2x2_neon(compptr->dct_table, coef_block, output_buf, output_col);
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_idct_4x4(j_decompress_ptr cinfo, jpeg_component_info *compptr,
|
||
|
|
JCOEFPTR coef_block, JSAMPARRAY output_buf,
|
||
|
|
JDIMENSION output_col)
|
||
|
|
{
|
||
|
|
jsimd_idct_4x4_neon(compptr->dct_table, coef_block, output_buf, 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 (BITS_IN_JSAMPLE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JDIMENSION) != 4)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(ISLOW_MULT_TYPE) != 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (simd_support & JSIMD_NEON)
|
||
|
|
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 (BITS_IN_JSAMPLE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JDIMENSION) != 4)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(IFAST_MULT_TYPE) != 2)
|
||
|
|
return 0;
|
||
|
|
if (IFAST_SCALE_BITS != 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (simd_support & JSIMD_NEON)
|
||
|
|
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_neon(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_neon(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)
|
||
|
|
{
|
||
|
|
init_simd();
|
||
|
|
|
||
|
|
if (DCTSIZE != 8)
|
||
|
|
return 0;
|
||
|
|
if (sizeof(JCOEF) != 2)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (simd_support & JSIMD_NEON && simd_huffman)
|
||
|
|
return 1;
|
||
|
|
|
||
|
|
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 jsimd_huff_encode_one_block_neon(state, buffer, block, last_dc_val,
|
||
|
|
dctbl, actbl);
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_can_encode_mcu_AC_first_prepare(void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(void)
|
||
|
|
jsimd_encode_mcu_AC_first_prepare(const JCOEF *block,
|
||
|
|
const int *jpeg_natural_order_start, int Sl,
|
||
|
|
int Al, JCOEF *values, size_t *zerobits)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_can_encode_mcu_AC_refine_prepare(void)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLOBAL(int)
|
||
|
|
jsimd_encode_mcu_AC_refine_prepare(const JCOEF *block,
|
||
|
|
const int *jpeg_natural_order_start, int Sl,
|
||
|
|
int Al, JCOEF *absvalues, size_t *bits)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|