diff options
Diffstat (limited to 'libass/ass_utils.c')
| -rw-r--r-- | libass/ass_utils.c | 215 |
1 files changed, 195 insertions, 20 deletions
diff --git a/libass/ass_utils.c b/libass/ass_utils.c index 072f325..90655c4 100644 --- a/libass/ass_utils.c +++ b/libass/ass_utils.c @@ -121,31 +121,206 @@ char parse_bool(char *str) return 0; } -#if 0 -static void sprint_tag(uint32_t tag, char *dst) +void ass_msg(int lvl, char *fmt, ...) { - dst[0] = (tag >> 24) & 0xFF; - dst[1] = (tag >> 16) & 0xFF; - dst[2] = (tag >> 8) & 0xFF; - dst[3] = tag & 0xFF; - dst[4] = 0; + va_list va; + if (lvl > MSGL_INFO) + return; + va_start(va, fmt); + vprintf(fmt, va); + va_end(va); } -void dump_glyph(FT_Glyph g) +unsigned ass_utf8_get_char(char **str) { - char tag[5]; + uint8_t *strp = (uint8_t *) * str; + unsigned c = *strp++; + unsigned mask = 0x80; + int len = -1; + while (c & mask) { + mask >>= 1; + len++; + } + if (len <= 0 || len > 4) + goto no_utf8; + c &= mask - 1; + while ((*strp & 0xc0) == 0x80) { + if (len-- <= 0) + goto no_utf8; + c = (c << 6) | (*strp++ & 0x3f); + } + if (len) + goto no_utf8; + *str = (char *) strp; + return c; + + no_utf8: + strp = (uint8_t *) * str; + c = *strp++; + *str = (char *) strp; + return c; +} + +// gaussian blur +void ass_gauss_blur(unsigned char *buffer, + unsigned short *tmp2, + int width, int height, int stride, int *m2, int r, int mwidth) +{ + + int x, y; + + unsigned char *s = buffer; + unsigned short *t = tmp2 + 1; + for (y = 0; y < height; y++) { + memset(t - 1, 0, (width + 1) * sizeof(short)); + + for (x = 0; x < r; x++) { + const int src = s[x]; + if (src) { + register unsigned short *dstp = t + x - r; + int mx; + unsigned *m3 = (unsigned *) (m2 + src * mwidth); + for (mx = r - x; mx < mwidth; mx++) { + dstp[mx] += m3[mx]; + } + } + } + + for (; x < width - r; x++) { + const int src = s[x]; + if (src) { + register unsigned short *dstp = t + x - r; + int mx; + unsigned *m3 = (unsigned *) (m2 + src * mwidth); + for (mx = 0; mx < mwidth; mx++) { + dstp[mx] += m3[mx]; + } + } + } + + for (; x < width; x++) { + const int src = s[x]; + if (src) { + register unsigned short *dstp = t + x - r; + int mx; + const int x2 = r + width - x; + unsigned *m3 = (unsigned *) (m2 + src * mwidth); + for (mx = 0; mx < x2; mx++) { + dstp[mx] += m3[mx]; + } + } + } + + s += stride; + t += width + 1; + } + + t = tmp2; + for (x = 0; x < width; x++) { + for (y = 0; y < r; y++) { + unsigned short *srcp = t + y * (width + 1) + 1; + int src = *srcp; + if (src) { + register unsigned short *dstp = srcp - 1 + width + 1; + const int src2 = (src + 128) >> 8; + unsigned *m3 = (unsigned *) (m2 + src2 * mwidth); + + int mx; + *srcp = 128; + for (mx = r - 1; mx < mwidth; mx++) { + *dstp += m3[mx]; + dstp += width + 1; + } + } + } + for (; y < height - r; y++) { + unsigned short *srcp = t + y * (width + 1) + 1; + int src = *srcp; + if (src) { + register unsigned short *dstp = srcp - 1 - r * (width + 1); + const int src2 = (src + 128) >> 8; + unsigned *m3 = (unsigned *) (m2 + src2 * mwidth); + + int mx; + *srcp = 128; + for (mx = 0; mx < mwidth; mx++) { + *dstp += m3[mx]; + dstp += width + 1; + } + } + } + for (; y < height; y++) { + unsigned short *srcp = t + y * (width + 1) + 1; + int src = *srcp; + if (src) { + const int y2 = r + height - y; + register unsigned short *dstp = srcp - 1 - r * (width + 1); + const int src2 = (src + 128) >> 8; + unsigned *m3 = (unsigned *) (m2 + src2 * mwidth); + + int mx; + *srcp = 128; + for (mx = 0; mx < y2; mx++) { + *dstp += m3[mx]; + dstp += width + 1; + } + } + } + t++; + } + + t = tmp2; + s = buffer; + for (y = 0; y < height; y++) { + for (x = 0; x < width; x++) { + s[x] = t[x] >> 8; + } + s += stride; + t += width + 1; + } +} + +#ifdef CONFIG_ENCA +void *ass_guess_buffer_cp(unsigned char *buffer, int buflen, + char *preferred_language, char *fallback) +{ + const char **languages; + size_t langcnt; + EncaAnalyser analyser; + EncaEncoding encoding; + char *detected_sub_cp = NULL; int i; - FT_OutlineGlyph og = (FT_OutlineGlyph) g; - FT_Outline *o = &(og->outline); - sprint_tag(g->format, tag); - printf("glyph: %p \n", g); - printf("format: %s \n", tag); - printf("outline: %p \n", o); - printf("contours: %d, points: %d, points ptr: %p \n", o->n_contours, - o->n_points, o->points); - for (i = 0; i < o->n_points; ++i) { - printf(" point %f, %f \n", d6_to_double(o->points[i].x), - d6_to_double(o->points[i].y)); + + languages = enca_get_languages(&langcnt); + ass_msg(MSGL_V, "ENCA supported languages: "); + for (i = 0; i < langcnt; i++) { + ass_msg(MSGL_V, "%s ", languages[i]); } + ass_msg(MSGL_V, "\n"); + + for (i = 0; i < langcnt; i++) { + const char *tmp; + + if (strcasecmp(languages[i], preferred_language) != 0) + continue; + analyser = enca_analyser_alloc(languages[i]); + encoding = enca_analyse_const(analyser, buffer, buflen); + tmp = enca_charset_name(encoding.charset, ENCA_NAME_STYLE_ICONV); + if (tmp && encoding.charset != ENCA_CS_UNKNOWN) { + detected_sub_cp = strdup(tmp); + ass_msg(MSGL_INFO, "ENCA detected charset: %s\n", tmp); + } + enca_analyser_free(analyser); + } + + free(languages); + + if (!detected_sub_cp) { + detected_sub_cp = strdup(fallback); + ass_msg(MSGL_INFO, + "ENCA detection failed: fallback to %s\n", fallback); + } + + return detected_sub_cp; } #endif |