325 lines
8.2 KiB
C
325 lines
8.2 KiB
C
/*
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* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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*
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* This file is part of libass.
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*
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* libass is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* libass is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with libass; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <inttypes.h>
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#include <ft2build.h>
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#include FT_GLYPH_H
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#include "ass_utils.h"
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int mystrtoi(char **p, int *res)
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{
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// NOTE: base argument is ignored, but not used in libass anyway
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double temp_res;
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char *start = *p;
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temp_res = strtod(*p, p);
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*res = (int) (temp_res + (temp_res > 0 ? 0.5 : -0.5));
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if (*p != start)
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return 1;
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else
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return 0;
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}
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int mystrtoll(char **p, long long *res)
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{
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double temp_res;
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char *start = *p;
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temp_res = strtod(*p, p);
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*res = (int) (temp_res + (temp_res > 0 ? 0.5 : -0.5));
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if (*p != start)
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return 1;
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else
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return 0;
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}
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int mystrtou32(char **p, int base, uint32_t *res)
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{
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char *start = *p;
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*res = strtoll(*p, p, base);
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if (*p != start)
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return 1;
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else
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return 0;
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}
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int mystrtod(char **p, double *res)
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{
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char *start = *p;
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*res = strtod(*p, p);
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if (*p != start)
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return 1;
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else
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return 0;
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}
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int strtocolor(char **q, uint32_t *res)
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{
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uint32_t color = 0;
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int result;
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char *p = *q;
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if (*p == '&')
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++p;
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else
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ass_msg(MSGL_DBG2, "suspicious color format: \"%s\"\n", p);
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if (*p == 'H' || *p == 'h') {
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++p;
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result = mystrtou32(&p, 16, &color);
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} else {
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result = mystrtou32(&p, 0, &color);
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}
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{
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unsigned char *tmp = (unsigned char *) (&color);
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unsigned char b;
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b = tmp[0];
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tmp[0] = tmp[3];
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tmp[3] = b;
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b = tmp[1];
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tmp[1] = tmp[2];
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tmp[2] = b;
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}
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if (*p == '&')
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++p;
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*q = p;
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*res = color;
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return result;
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}
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// Return a boolean value for a string
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char parse_bool(char *str)
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{
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while (*str == ' ' || *str == '\t')
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str++;
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if (!strncasecmp(str, "yes", 3))
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return 1;
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else if (strtol(str, NULL, 10) > 0)
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return 1;
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return 0;
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}
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void ass_msg(int lvl, char *fmt, ...)
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{
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va_list va;
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if (lvl > MSGL_INFO)
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return;
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va_start(va, fmt);
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vprintf(fmt, va);
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va_end(va);
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}
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unsigned ass_utf8_get_char(char **str)
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{
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uint8_t *strp = (uint8_t *) * str;
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unsigned c = *strp++;
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unsigned mask = 0x80;
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int len = -1;
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while (c & mask) {
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mask >>= 1;
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len++;
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}
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if (len <= 0 || len > 4)
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goto no_utf8;
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c &= mask - 1;
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while ((*strp & 0xc0) == 0x80) {
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if (len-- <= 0)
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goto no_utf8;
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c = (c << 6) | (*strp++ & 0x3f);
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}
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if (len)
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goto no_utf8;
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*str = (char *) strp;
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return c;
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no_utf8:
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strp = (uint8_t *) * str;
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c = *strp++;
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*str = (char *) strp;
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return c;
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}
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// gaussian blur
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void ass_gauss_blur(unsigned char *buffer,
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unsigned short *tmp2,
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int width, int height, int stride, int *m2, int r, int mwidth)
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{
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int x, y;
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unsigned char *s = buffer;
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unsigned short *t = tmp2 + 1;
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for (y = 0; y < height; y++) {
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memset(t - 1, 0, (width + 1) * sizeof(short));
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for (x = 0; x < r; x++) {
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const int src = s[x];
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if (src) {
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register unsigned short *dstp = t + x - r;
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int mx;
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unsigned *m3 = (unsigned *) (m2 + src * mwidth);
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for (mx = r - x; mx < mwidth; mx++) {
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dstp[mx] += m3[mx];
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}
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}
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}
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for (; x < width - r; x++) {
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const int src = s[x];
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if (src) {
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register unsigned short *dstp = t + x - r;
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int mx;
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unsigned *m3 = (unsigned *) (m2 + src * mwidth);
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for (mx = 0; mx < mwidth; mx++) {
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dstp[mx] += m3[mx];
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}
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}
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}
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for (; x < width; x++) {
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const int src = s[x];
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if (src) {
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register unsigned short *dstp = t + x - r;
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int mx;
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const int x2 = r + width - x;
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unsigned *m3 = (unsigned *) (m2 + src * mwidth);
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for (mx = 0; mx < x2; mx++) {
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dstp[mx] += m3[mx];
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}
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}
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}
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s += stride;
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t += width + 1;
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}
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t = tmp2;
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for (x = 0; x < width; x++) {
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for (y = 0; y < r; y++) {
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unsigned short *srcp = t + y * (width + 1) + 1;
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int src = *srcp;
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if (src) {
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register unsigned short *dstp = srcp - 1 + width + 1;
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const int src2 = (src + 128) >> 8;
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unsigned *m3 = (unsigned *) (m2 + src2 * mwidth);
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int mx;
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*srcp = 128;
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for (mx = r - 1; mx < mwidth; mx++) {
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*dstp += m3[mx];
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dstp += width + 1;
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}
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}
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}
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for (; y < height - r; y++) {
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unsigned short *srcp = t + y * (width + 1) + 1;
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int src = *srcp;
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if (src) {
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register unsigned short *dstp = srcp - 1 - r * (width + 1);
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const int src2 = (src + 128) >> 8;
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unsigned *m3 = (unsigned *) (m2 + src2 * mwidth);
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int mx;
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*srcp = 128;
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for (mx = 0; mx < mwidth; mx++) {
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*dstp += m3[mx];
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dstp += width + 1;
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}
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}
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}
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for (; y < height; y++) {
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unsigned short *srcp = t + y * (width + 1) + 1;
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int src = *srcp;
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if (src) {
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const int y2 = r + height - y;
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register unsigned short *dstp = srcp - 1 - r * (width + 1);
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const int src2 = (src + 128) >> 8;
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unsigned *m3 = (unsigned *) (m2 + src2 * mwidth);
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int mx;
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*srcp = 128;
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for (mx = 0; mx < y2; mx++) {
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*dstp += m3[mx];
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dstp += width + 1;
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}
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}
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}
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t++;
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}
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t = tmp2;
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s = buffer;
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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s[x] = t[x] >> 8;
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}
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s += stride;
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t += width + 1;
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}
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}
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#ifdef CONFIG_ENCA
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void *ass_guess_buffer_cp(unsigned char *buffer, int buflen,
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char *preferred_language, char *fallback)
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{
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const char **languages;
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size_t langcnt;
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EncaAnalyser analyser;
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EncaEncoding encoding;
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char *detected_sub_cp = NULL;
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int i;
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languages = enca_get_languages(&langcnt);
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ass_msg(MSGL_V, "ENCA supported languages: ");
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for (i = 0; i < langcnt; i++) {
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ass_msg(MSGL_V, "%s ", languages[i]);
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}
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ass_msg(MSGL_V, "\n");
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for (i = 0; i < langcnt; i++) {
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const char *tmp;
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if (strcasecmp(languages[i], preferred_language) != 0)
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continue;
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analyser = enca_analyser_alloc(languages[i]);
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encoding = enca_analyse_const(analyser, buffer, buflen);
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tmp = enca_charset_name(encoding.charset, ENCA_NAME_STYLE_ICONV);
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if (tmp && encoding.charset != ENCA_CS_UNKNOWN) {
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detected_sub_cp = strdup(tmp);
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ass_msg(MSGL_INFO, "ENCA detected charset: %s\n", tmp);
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}
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enca_analyser_free(analyser);
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}
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free(languages);
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if (!detected_sub_cp) {
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detected_sub_cp = strdup(fallback);
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ass_msg(MSGL_INFO,
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"ENCA detection failed: fallback to %s\n", fallback);
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}
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return detected_sub_cp;
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}
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#endif
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