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libass.24379
CVE-2020-24994_1.patch
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File CVE-2020-24994_1.patch of Package libass.24379
From 691b422247552a86e9d3310c4f1ea096dc52a3f2 Mon Sep 17 00:00:00 2001 From: Oleg Oshmyan <chortos@inbox.lv> Date: Thu, 4 Jan 2018 02:37:02 +0200 Subject: [PATCH] Move parse_tag loop into parse_tag itself, now called parse_tags This commit is mostly transparent to `git blame -w`. --- libass/ass_parse.c | 1172 +++++++++++++++++++++---------------------- libass/ass_parse.h | 2 +- libass/ass_render.c | 3 +- 3 files changed, 588 insertions(+), 589 deletions(-) diff --git a/libass/ass_parse.c b/libass/ass_parse.c index c83634ab..b20ef664 100644 --- a/libass/ass_parse.c +++ b/libass/ass_parse.c @@ -224,620 +224,620 @@ static int parse_vector_clip(ASS_Renderer *render_priv, } /** - * \brief Parse style override tag. + * \brief Parse style override tags. * \param p string to parse * \param end end of string to parse, which must be '}', ')', or the first * of a number of spaces immediately preceding '}' or ')' * \param pwr multiplier for some tag effects (comes from \t tags) */ -char *parse_tag(ASS_Renderer *render_priv, char *p, char *end, double pwr) +char *parse_tags(ASS_Renderer *render_priv, char *p, char *end, double pwr) { - while (*p != '\\' && p != end) + for (char *q; p < end; p = q) { + while (*p != '\\' && p != end) + ++p; + if (*p != '\\') + break; ++p; - if (*p != '\\') - return p; - ++p; - if (p != end) - skip_spaces(&p); + if (p != end) + skip_spaces(&p); - char *q = p; - while (*q != '(' && *q != '\\' && q != end) - ++q; - if (q == p) - return q; + q = p; + while (*q != '(' && *q != '\\' && q != end) + ++q; + if (q == p) + continue; - char *name_end = q; + char *name_end = q; - // Store one extra element to be able to detect excess arguments - struct arg args[MAX_VALID_NARGS + 1]; - int nargs = 0; - for (int i = 0; i <= MAX_VALID_NARGS; ++i) - args[i].start = args[i].end = ""; + // Store one extra element to be able to detect excess arguments + struct arg args[MAX_VALID_NARGS + 1]; + int nargs = 0; + for (int i = 0; i <= MAX_VALID_NARGS; ++i) + args[i].start = args[i].end = ""; - // Split parenthesized arguments. Do this for all tags and before - // any non-parenthesized argument because that's what VSFilter does. - if (*q == '(') { - ++q; - while (1) { - if (q != end) - skip_spaces(&q); - - // Split on commas. If there is a backslash, ignore any - // commas following it and lump everything starting from - // the last comma, through the backslash and all the way - // to the end of the argument string into a single argument. + // Split parenthesized arguments. Do this for all tags and before + // any non-parenthesized argument because that's what VSFilter does. + if (*q == '(') { + ++q; + while (1) { + if (q != end) + skip_spaces(&q); - char *r = q; - while (*r != ',' && *r != '\\' && *r != ')' && r != end) - ++r; + // Split on commas. If there is a backslash, ignore any + // commas following it and lump everything starting from + // the last comma, through the backslash and all the way + // to the end of the argument string into a single argument. - if (*r == ',') { - push_arg(args, &nargs, q, r); - q = r + 1; - } else { - // Swallow the rest of the parenthesized string. This could - // be either a backslash-argument or simply the last argument. - while (*r != ')' && r != end) + char *r = q; + while (*r != ',' && *r != '\\' && *r != ')' && r != end) ++r; - push_arg(args, &nargs, q, r); - q = r; - // The closing parenthesis could be missing. - if (q != end) - ++q; - break; + + if (*r == ',') { + push_arg(args, &nargs, q, r); + q = r + 1; + } else { + // Swallow the rest of the parenthesized string. This could + // be either a backslash-argument or simply the last argument. + while (*r != ')' && r != end) + ++r; + push_arg(args, &nargs, q, r); + q = r; + // The closing parenthesis could be missing. + if (q != end) + ++q; + break; + } } } - } #define tag(name) (mystrcmp(&p, (name)) && (push_arg(args, &nargs, p, name_end), 1)) #define complex_tag(name) mystrcmp(&p, (name)) - // New tags introduced in vsfilter 2.39 - if (tag("xbord")) { - double val; - if (nargs) { - val = argtod(*args); - val = render_priv->state.border_x * (1 - pwr) + val * pwr; - val = (val < 0) ? 0 : val; - } else - val = render_priv->state.style->Outline; - render_priv->state.border_x = val; - } else if (tag("ybord")) { - double val; - if (nargs) { - val = argtod(*args); - val = render_priv->state.border_y * (1 - pwr) + val * pwr; - val = (val < 0) ? 0 : val; - } else - val = render_priv->state.style->Outline; - render_priv->state.border_y = val; - } else if (tag("xshad")) { - double val; - if (nargs) { - val = argtod(*args); - val = render_priv->state.shadow_x * (1 - pwr) + val * pwr; - } else - val = render_priv->state.style->Shadow; - render_priv->state.shadow_x = val; - } else if (tag("yshad")) { - double val; - if (nargs) { - val = argtod(*args); - val = render_priv->state.shadow_y * (1 - pwr) + val * pwr; - } else - val = render_priv->state.style->Shadow; - render_priv->state.shadow_y = val; - } else if (tag("fax")) { - double val; - if (nargs) { - val = argtod(*args); - render_priv->state.fax = - val * pwr + render_priv->state.fax * (1 - pwr); - } else - render_priv->state.fax = 0.; - } else if (tag("fay")) { - double val; - if (nargs) { - val = argtod(*args); - render_priv->state.fay = - val * pwr + render_priv->state.fay * (1 - pwr); - } else - render_priv->state.fay = 0.; - } else if (complex_tag("iclip")) { - if (nargs == 4) { - int x0, y0, x1, y1; - x0 = argtoi(args[0]); - y0 = argtoi(args[1]); - x1 = argtoi(args[2]); - y1 = argtoi(args[3]); - render_priv->state.clip_x0 = - render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr; - render_priv->state.clip_x1 = - render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr; - render_priv->state.clip_y0 = - render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr; - render_priv->state.clip_y1 = - render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr; - render_priv->state.clip_mode = 1; - } else if (!render_priv->state.clip_drawing) { - if (parse_vector_clip(render_priv, args, nargs)) - render_priv->state.clip_drawing_mode = 1; - } - } else if (tag("blur")) { - double val; - if (nargs) { - val = argtod(*args); - val = render_priv->state.blur * (1 - pwr) + val * pwr; - val = (val < 0) ? 0 : val; - val = (val > BLUR_MAX_RADIUS) ? BLUR_MAX_RADIUS : val; - render_priv->state.blur = val; - } else - render_priv->state.blur = 0.0; - // ASS standard tags - } else if (tag("fscx")) { - double val; - if (nargs) { - val = argtod(*args) / 100; - val = render_priv->state.scale_x * (1 - pwr) + val * pwr; - val = (val < 0) ? 0 : val; - } else - val = render_priv->state.style->ScaleX; - render_priv->state.scale_x = val; - } else if (tag("fscy")) { - double val; - if (nargs) { - val = argtod(*args) / 100; - val = render_priv->state.scale_y * (1 - pwr) + val * pwr; - val = (val < 0) ? 0 : val; - } else - val = render_priv->state.style->ScaleY; - render_priv->state.scale_y = val; - } else if (tag("fsc")) { - render_priv->state.scale_x = render_priv->state.style->ScaleX; - render_priv->state.scale_y = render_priv->state.style->ScaleY; - } else if (tag("fsp")) { - double val; - if (nargs) { - val = argtod(*args); - render_priv->state.hspacing = - render_priv->state.hspacing * (1 - pwr) + val * pwr; - } else - render_priv->state.hspacing = render_priv->state.style->Spacing; - } else if (tag("fs")) { - double val = 0; - if (nargs) { - val = argtod(*args); - if (*args->start == '+' || *args->start == '-') - val = render_priv->state.font_size * (1 + pwr * val / 10); - else - val = render_priv->state.font_size * (1 - pwr) + val * pwr; - } - if (val <= 0) - val = render_priv->state.style->FontSize; - if (render_priv->state.font) - change_font_size(render_priv, val); - } else if (tag("bord")) { - double val, xval, yval; - if (nargs) { - val = argtod(*args); - xval = render_priv->state.border_x * (1 - pwr) + val * pwr; - yval = render_priv->state.border_y * (1 - pwr) + val * pwr; - xval = (xval < 0) ? 0 : xval; - yval = (yval < 0) ? 0 : yval; - } else - xval = yval = render_priv->state.style->Outline; - render_priv->state.border_x = xval; - render_priv->state.border_y = yval; - } else if (complex_tag("move")) { - double x1, x2, y1, y2; - long long t1, t2, delta_t, t; - double x, y; - double k; - if (nargs == 4 || nargs == 6) { - x1 = argtod(args[0]); - y1 = argtod(args[1]); - x2 = argtod(args[2]); - y2 = argtod(args[3]); - t1 = t2 = 0; - if (nargs == 6) { - t1 = argtoll(args[4]); - t2 = argtoll(args[5]); - if (t1 > t2) { - long long tmp = t2; - t2 = t1; - t1 = tmp; + // New tags introduced in vsfilter 2.39 + if (tag("xbord")) { + double val; + if (nargs) { + val = argtod(*args); + val = render_priv->state.border_x * (1 - pwr) + val * pwr; + val = (val < 0) ? 0 : val; + } else + val = render_priv->state.style->Outline; + render_priv->state.border_x = val; + } else if (tag("ybord")) { + double val; + if (nargs) { + val = argtod(*args); + val = render_priv->state.border_y * (1 - pwr) + val * pwr; + val = (val < 0) ? 0 : val; + } else + val = render_priv->state.style->Outline; + render_priv->state.border_y = val; + } else if (tag("xshad")) { + double val; + if (nargs) { + val = argtod(*args); + val = render_priv->state.shadow_x * (1 - pwr) + val * pwr; + } else + val = render_priv->state.style->Shadow; + render_priv->state.shadow_x = val; + } else if (tag("yshad")) { + double val; + if (nargs) { + val = argtod(*args); + val = render_priv->state.shadow_y * (1 - pwr) + val * pwr; + } else + val = render_priv->state.style->Shadow; + render_priv->state.shadow_y = val; + } else if (tag("fax")) { + double val; + if (nargs) { + val = argtod(*args); + render_priv->state.fax = + val * pwr + render_priv->state.fax * (1 - pwr); + } else + render_priv->state.fax = 0.; + } else if (tag("fay")) { + double val; + if (nargs) { + val = argtod(*args); + render_priv->state.fay = + val * pwr + render_priv->state.fay * (1 - pwr); + } else + render_priv->state.fay = 0.; + } else if (complex_tag("iclip")) { + if (nargs == 4) { + int x0, y0, x1, y1; + x0 = argtoi(args[0]); + y0 = argtoi(args[1]); + x1 = argtoi(args[2]); + y1 = argtoi(args[3]); + render_priv->state.clip_x0 = + render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr; + render_priv->state.clip_x1 = + render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr; + render_priv->state.clip_y0 = + render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr; + render_priv->state.clip_y1 = + render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr; + render_priv->state.clip_mode = 1; + } else if (!render_priv->state.clip_drawing) { + if (parse_vector_clip(render_priv, args, nargs)) + render_priv->state.clip_drawing_mode = 1; + } + } else if (tag("blur")) { + double val; + if (nargs) { + val = argtod(*args); + val = render_priv->state.blur * (1 - pwr) + val * pwr; + val = (val < 0) ? 0 : val; + val = (val > BLUR_MAX_RADIUS) ? BLUR_MAX_RADIUS : val; + render_priv->state.blur = val; + } else + render_priv->state.blur = 0.0; + // ASS standard tags + } else if (tag("fscx")) { + double val; + if (nargs) { + val = argtod(*args) / 100; + val = render_priv->state.scale_x * (1 - pwr) + val * pwr; + val = (val < 0) ? 0 : val; + } else + val = render_priv->state.style->ScaleX; + render_priv->state.scale_x = val; + } else if (tag("fscy")) { + double val; + if (nargs) { + val = argtod(*args) / 100; + val = render_priv->state.scale_y * (1 - pwr) + val * pwr; + val = (val < 0) ? 0 : val; + } else + val = render_priv->state.style->ScaleY; + render_priv->state.scale_y = val; + } else if (tag("fsc")) { + render_priv->state.scale_x = render_priv->state.style->ScaleX; + render_priv->state.scale_y = render_priv->state.style->ScaleY; + } else if (tag("fsp")) { + double val; + if (nargs) { + val = argtod(*args); + render_priv->state.hspacing = + render_priv->state.hspacing * (1 - pwr) + val * pwr; + } else + render_priv->state.hspacing = render_priv->state.style->Spacing; + } else if (tag("fs")) { + double val = 0; + if (nargs) { + val = argtod(*args); + if (*args->start == '+' || *args->start == '-') + val = render_priv->state.font_size * (1 + pwr * val / 10); + else + val = render_priv->state.font_size * (1 - pwr) + val * pwr; + } + if (val <= 0) + val = render_priv->state.style->FontSize; + if (render_priv->state.font) + change_font_size(render_priv, val); + } else if (tag("bord")) { + double val, xval, yval; + if (nargs) { + val = argtod(*args); + xval = render_priv->state.border_x * (1 - pwr) + val * pwr; + yval = render_priv->state.border_y * (1 - pwr) + val * pwr; + xval = (xval < 0) ? 0 : xval; + yval = (yval < 0) ? 0 : yval; + } else + xval = yval = render_priv->state.style->Outline; + render_priv->state.border_x = xval; + render_priv->state.border_y = yval; + } else if (complex_tag("move")) { + double x1, x2, y1, y2; + long long t1, t2, delta_t, t; + double x, y; + double k; + if (nargs == 4 || nargs == 6) { + x1 = argtod(args[0]); + y1 = argtod(args[1]); + x2 = argtod(args[2]); + y2 = argtod(args[3]); + t1 = t2 = 0; + if (nargs == 6) { + t1 = argtoll(args[4]); + t2 = argtoll(args[5]); + if (t1 > t2) { + long long tmp = t2; + t2 = t1; + t1 = tmp; + } } + } else + continue; + if (t1 <= 0 && t2 <= 0) { + t1 = 0; + t2 = render_priv->state.event->Duration; } - } else - return q; - if (t1 <= 0 && t2 <= 0) { - t1 = 0; - t2 = render_priv->state.event->Duration; - } - delta_t = t2 - t1; - t = render_priv->time - render_priv->state.event->Start; - if (t <= t1) - k = 0.; - else if (t >= t2) - k = 1.; - else - k = ((double) (t - t1)) / delta_t; - x = k * (x2 - x1) + x1; - y = k * (y2 - y1) + y1; - if (render_priv->state.evt_type != EVENT_POSITIONED) { - render_priv->state.pos_x = x; - render_priv->state.pos_y = y; + delta_t = t2 - t1; + t = render_priv->time - render_priv->state.event->Start; + if (t <= t1) + k = 0.; + else if (t >= t2) + k = 1.; + else + k = ((double) (t - t1)) / delta_t; + x = k * (x2 - x1) + x1; + y = k * (y2 - y1) + y1; + if (render_priv->state.evt_type != EVENT_POSITIONED) { + render_priv->state.pos_x = x; + render_priv->state.pos_y = y; + render_priv->state.detect_collisions = 0; + render_priv->state.evt_type = EVENT_POSITIONED; + } + } else if (tag("frx")) { + double val; + if (nargs) { + val = argtod(*args); + val *= M_PI / 180; + render_priv->state.frx = + val * pwr + render_priv->state.frx * (1 - pwr); + } else + render_priv->state.frx = 0.; + } else if (tag("fry")) { + double val; + if (nargs) { + val = argtod(*args); + val *= M_PI / 180; + render_priv->state.fry = + val * pwr + render_priv->state.fry * (1 - pwr); + } else + render_priv->state.fry = 0.; + } else if (tag("frz") || tag("fr")) { + double val; + if (nargs) { + val = argtod(*args); + val *= M_PI / 180; + render_priv->state.frz = + val * pwr + render_priv->state.frz * (1 - pwr); + } else + render_priv->state.frz = + M_PI * render_priv->state.style->Angle / 180.; + } else if (tag("fn")) { + char *family; + char *start = args->start; + if (nargs && strncmp(start, "0", args->end - start)) { + skip_spaces(&start); + family = strndup(start, args->end - start); + } else + family = strdup(render_priv->state.style->FontName); + free(render_priv->state.family); + render_priv->state.family = family; + update_font(render_priv); + } else if (tag("alpha")) { + int i; + if (nargs) { + int32_t a = parse_alpha_tag(args->start); + for (i = 0; i < 4; ++i) + change_alpha(&render_priv->state.c[i], a, pwr); + } else { + change_alpha(&render_priv->state.c[0], + _a(render_priv->state.style->PrimaryColour), 1); + change_alpha(&render_priv->state.c[1], + _a(render_priv->state.style->SecondaryColour), 1); + change_alpha(&render_priv->state.c[2], + _a(render_priv->state.style->OutlineColour), 1); + change_alpha(&render_priv->state.c[3], + _a(render_priv->state.style->BackColour), 1); + } + // FIXME: simplify + } else if (tag("an")) { + int val = argtoi(*args); + if ((render_priv->state.parsed_tags & PARSED_A) == 0) { + if (val >= 1 && val <= 9) + render_priv->state.alignment = numpad2align(val); + else + render_priv->state.alignment = + render_priv->state.style->Alignment; + render_priv->state.parsed_tags |= PARSED_A; + } + } else if (tag("a")) { + int val = argtoi(*args); + if ((render_priv->state.parsed_tags & PARSED_A) == 0) { + if (val >= 1 && val <= 11) + // take care of a vsfilter quirk: + // handle illegal \a8 and \a4 like \a5 + render_priv->state.alignment = ((val & 3) == 0) ? 5 : val; + else + render_priv->state.alignment = + render_priv->state.style->Alignment; + render_priv->state.parsed_tags |= PARSED_A; + } + } else if (complex_tag("pos")) { + double v1, v2; + if (nargs == 2) { + v1 = argtod(args[0]); + v2 = argtod(args[1]); + } else + continue; + if (render_priv->state.evt_type == EVENT_POSITIONED) { + ass_msg(render_priv->library, MSGL_V, "Subtitle has a new \\pos " + "after \\move or \\pos, ignoring"); + } else { + render_priv->state.evt_type = EVENT_POSITIONED; + render_priv->state.detect_collisions = 0; + render_priv->state.pos_x = v1; + render_priv->state.pos_y = v2; + } + } else if (complex_tag("fade") || complex_tag("fad")) { + int a1, a2, a3; + long long t1, t2, t3, t4; + if (nargs == 2) { + // 2-argument version (\fad, according to specs) + a1 = 0xFF; + a2 = 0; + a3 = 0xFF; + t1 = -1; + t2 = argtoll(args[0]); + t3 = argtoll(args[1]); + t4 = -1; + } else if (nargs == 7) { + // 7-argument version (\fade) + a1 = argtoi(args[0]); + a2 = argtoi(args[1]); + a3 = argtoi(args[2]); + t1 = argtoll(args[3]); + t2 = argtoll(args[4]); + t3 = argtoll(args[5]); + t4 = argtoll(args[6]); + } else + continue; + if (t1 == -1 && t4 == -1) { + t1 = 0; + t4 = render_priv->state.event->Duration; + t3 = t4 - t3; + } + if ((render_priv->state.parsed_tags & PARSED_FADE) == 0) { + render_priv->state.fade = + interpolate_alpha(render_priv->time - + render_priv->state.event->Start, t1, t2, + t3, t4, a1, a2, a3); + render_priv->state.parsed_tags |= PARSED_FADE; + } + } else if (complex_tag("org")) { + double v1, v2; + if (nargs == 2) { + v1 = argtod(args[0]); + v2 = argtod(args[1]); + } else + continue; + if (!render_priv->state.have_origin) { + render_priv->state.org_x = v1; + render_priv->state.org_y = v2; + render_priv->state.have_origin = 1; + render_priv->state.detect_collisions = 0; + } + } else if (complex_tag("t")) { + double accel; + int cnt = nargs - 1; + long long t1, t2, t, delta_t; + double k; + if (cnt == 3) { + t1 = argtoll(args[0]); + t2 = argtoll(args[1]); + accel = argtod(args[2]); + } else if (cnt == 2) { + t1 = argtoll(args[0]); + t2 = argtoll(args[1]); + accel = 1.; + } else if (cnt == 1) { + t1 = 0; + t2 = 0; + accel = argtod(args[0]); + } else if (cnt == 0) { + t1 = 0; + t2 = 0; + accel = 1.; + } else + continue; render_priv->state.detect_collisions = 0; - render_priv->state.evt_type = EVENT_POSITIONED; - } - } else if (tag("frx")) { - double val; - if (nargs) { - val = argtod(*args); - val *= M_PI / 180; - render_priv->state.frx = - val * pwr + render_priv->state.frx * (1 - pwr); - } else - render_priv->state.frx = 0.; - } else if (tag("fry")) { - double val; - if (nargs) { - val = argtod(*args); - val *= M_PI / 180; - render_priv->state.fry = - val * pwr + render_priv->state.fry * (1 - pwr); - } else - render_priv->state.fry = 0.; - } else if (tag("frz") || tag("fr")) { - double val; - if (nargs) { - val = argtod(*args); - val *= M_PI / 180; - render_priv->state.frz = - val * pwr + render_priv->state.frz * (1 - pwr); - } else - render_priv->state.frz = - M_PI * render_priv->state.style->Angle / 180.; - } else if (tag("fn")) { - char *family; - char *start = args->start; - end = args->end; - if (nargs && strncmp(start, "0", end - start)) { - skip_spaces(&start); - family = strndup(start, end - start); - } else - family = strdup(render_priv->state.style->FontName); - free(render_priv->state.family); - render_priv->state.family = family; - update_font(render_priv); - } else if (tag("alpha")) { - int i; - if (nargs) { - int32_t a = parse_alpha_tag(args->start); - for (i = 0; i < 4; ++i) - change_alpha(&render_priv->state.c[i], a, pwr); - } else { - change_alpha(&render_priv->state.c[0], - _a(render_priv->state.style->PrimaryColour), 1); - change_alpha(&render_priv->state.c[1], - _a(render_priv->state.style->SecondaryColour), 1); - change_alpha(&render_priv->state.c[2], - _a(render_priv->state.style->OutlineColour), 1); - change_alpha(&render_priv->state.c[3], - _a(render_priv->state.style->BackColour), 1); - } - // FIXME: simplify - } else if (tag("an")) { - int val = argtoi(*args); - if ((render_priv->state.parsed_tags & PARSED_A) == 0) { - if (val >= 1 && val <= 9) - render_priv->state.alignment = numpad2align(val); + if (t2 == 0) + t2 = render_priv->state.event->Duration; + delta_t = t2 - t1; + t = render_priv->time - render_priv->state.event->Start; // FIXME: move to render_context + if (t <= t1) + k = 0.; + else if (t >= t2) + k = 1.; + else { + assert(delta_t != 0.); + k = pow(((double) (t - t1)) / delta_t, accel); + } + p = args[cnt].start; + p = parse_tags(render_priv, p, args[cnt].end, k); // maybe k*pwr ? no, specs forbid nested \t's + } else if (complex_tag("clip")) { + if (nargs == 4) { + int x0, y0, x1, y1; + x0 = argtoi(args[0]); + y0 = argtoi(args[1]); + x1 = argtoi(args[2]); + y1 = argtoi(args[3]); + render_priv->state.clip_x0 = + render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr; + render_priv->state.clip_x1 = + render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr; + render_priv->state.clip_y0 = + render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr; + render_priv->state.clip_y1 = + render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr; + render_priv->state.clip_mode = 0; + } else if (!render_priv->state.clip_drawing) { + if (parse_vector_clip(render_priv, args, nargs)) + render_priv->state.clip_drawing_mode = 0; + } + } else if (tag("c") || tag("1c")) { + if (nargs) { + uint32_t val = parse_color_tag(args->start); + change_color(&render_priv->state.c[0], val, pwr); + } else + change_color(&render_priv->state.c[0], + render_priv->state.style->PrimaryColour, 1); + } else if (tag("2c")) { + if (nargs) { + uint32_t val = parse_color_tag(args->start); + change_color(&render_priv->state.c[1], val, pwr); + } else + change_color(&render_priv->state.c[1], + render_priv->state.style->SecondaryColour, 1); + } else if (tag("3c")) { + if (nargs) { + uint32_t val = parse_color_tag(args->start); + change_color(&render_priv->state.c[2], val, pwr); + } else + change_color(&render_priv->state.c[2], + render_priv->state.style->OutlineColour, 1); + } else if (tag("4c")) { + if (nargs) { + uint32_t val = parse_color_tag(args->start); + change_color(&render_priv->state.c[3], val, pwr); + } else + change_color(&render_priv->state.c[3], + render_priv->state.style->BackColour, 1); + } else if (tag("1a")) { + if (nargs) { + uint32_t val = parse_alpha_tag(args->start); + change_alpha(&render_priv->state.c[0], val, pwr); + } else + change_alpha(&render_priv->state.c[0], + _a(render_priv->state.style->PrimaryColour), 1); + } else if (tag("2a")) { + if (nargs) { + uint32_t val = parse_alpha_tag(args->start); + change_alpha(&render_priv->state.c[1], val, pwr); + } else + change_alpha(&render_priv->state.c[1], + _a(render_priv->state.style->SecondaryColour), 1); + } else if (tag("3a")) { + if (nargs) { + uint32_t val = parse_alpha_tag(args->start); + change_alpha(&render_priv->state.c[2], val, pwr); + } else + change_alpha(&render_priv->state.c[2], + _a(render_priv->state.style->OutlineColour), 1); + } else if (tag("4a")) { + if (nargs) { + uint32_t val = parse_alpha_tag(args->start); + change_alpha(&render_priv->state.c[3], val, pwr); + } else + change_alpha(&render_priv->state.c[3], + _a(render_priv->state.style->BackColour), 1); + } else if (tag("r")) { + if (nargs) { + int len = args->end - args->start; + reset_render_context(render_priv, + lookup_style_strict(render_priv->track, args->start, len)); + } else + reset_render_context(render_priv, NULL); + } else if (tag("be")) { + double dval; + if (nargs) { + int val; + dval = argtod(*args); + // VSFilter always adds +0.5, even if the value is negative + val = (int) (render_priv->state.be * (1 - pwr) + dval * pwr + 0.5); + // Clamp to a safe upper limit, since high values need excessive CPU + val = (val < 0) ? 0 : val; + val = (val > MAX_BE) ? MAX_BE : val; + render_priv->state.be = val; + } else + render_priv->state.be = 0; + } else if (tag("b")) { + int val = argtoi(*args); + if (!nargs || !(val == 0 || val == 1 || val >= 100)) + val = render_priv->state.style->Bold; + render_priv->state.bold = val; + update_font(render_priv); + } else if (tag("i")) { + int val = argtoi(*args); + if (!nargs || !(val == 0 || val == 1)) + val = render_priv->state.style->Italic; + render_priv->state.italic = val; + update_font(render_priv); + } else if (tag("kf") || tag("K")) { + double val = 100; + if (nargs) + val = argtod(*args); + render_priv->state.effect_type = EF_KARAOKE_KF; + if (render_priv->state.effect_timing) + render_priv->state.effect_skip_timing += + render_priv->state.effect_timing; + render_priv->state.effect_timing = val * 10; + } else if (tag("ko")) { + double val = 100; + if (nargs) + val = argtod(*args); + render_priv->state.effect_type = EF_KARAOKE_KO; + if (render_priv->state.effect_timing) + render_priv->state.effect_skip_timing += + render_priv->state.effect_timing; + render_priv->state.effect_timing = val * 10; + } else if (tag("k")) { + double val = 100; + if (nargs) + val = argtod(*args); + render_priv->state.effect_type = EF_KARAOKE; + if (render_priv->state.effect_timing) + render_priv->state.effect_skip_timing += + render_priv->state.effect_timing; + render_priv->state.effect_timing = val * 10; + } else if (tag("shad")) { + double val, xval, yval; + if (nargs) { + val = argtod(*args); + xval = render_priv->state.shadow_x * (1 - pwr) + val * pwr; + yval = render_priv->state.shadow_y * (1 - pwr) + val * pwr; + // VSFilter compatibility: clip for \shad but not for \[xy]shad + xval = (xval < 0) ? 0 : xval; + yval = (yval < 0) ? 0 : yval; + } else + xval = yval = render_priv->state.style->Shadow; + render_priv->state.shadow_x = xval; + render_priv->state.shadow_y = yval; + } else if (tag("s")) { + int val = argtoi(*args); + if (!nargs || !(val == 0 || val == 1)) + val = render_priv->state.style->StrikeOut; + if (val) + render_priv->state.flags |= DECO_STRIKETHROUGH; else - render_priv->state.alignment = - render_priv->state.style->Alignment; - render_priv->state.parsed_tags |= PARSED_A; - } - } else if (tag("a")) { - int val = argtoi(*args); - if ((render_priv->state.parsed_tags & PARSED_A) == 0) { - if (val >= 1 && val <= 11) - // take care of a vsfilter quirk: - // handle illegal \a8 and \a4 like \a5 - render_priv->state.alignment = ((val & 3) == 0) ? 5 : val; + render_priv->state.flags &= ~DECO_STRIKETHROUGH; + } else if (tag("u")) { + int val = argtoi(*args); + if (!nargs || !(val == 0 || val == 1)) + val = render_priv->state.style->Underline; + if (val) + render_priv->state.flags |= DECO_UNDERLINE; else - render_priv->state.alignment = - render_priv->state.style->Alignment; - render_priv->state.parsed_tags |= PARSED_A; - } - } else if (complex_tag("pos")) { - double v1, v2; - if (nargs == 2) { - v1 = argtod(args[0]); - v2 = argtod(args[1]); - } else - return q; - if (render_priv->state.evt_type == EVENT_POSITIONED) { - ass_msg(render_priv->library, MSGL_V, "Subtitle has a new \\pos " - "after \\move or \\pos, ignoring"); - } else { - render_priv->state.evt_type = EVENT_POSITIONED; - render_priv->state.detect_collisions = 0; - render_priv->state.pos_x = v1; - render_priv->state.pos_y = v2; - } - } else if (complex_tag("fade") || complex_tag("fad")) { - int a1, a2, a3; - long long t1, t2, t3, t4; - if (nargs == 2) { - // 2-argument version (\fad, according to specs) - a1 = 0xFF; - a2 = 0; - a3 = 0xFF; - t1 = -1; - t2 = argtoll(args[0]); - t3 = argtoll(args[1]); - t4 = -1; - } else if (nargs == 7) { - // 7-argument version (\fade) - a1 = argtoi(args[0]); - a2 = argtoi(args[1]); - a3 = argtoi(args[2]); - t1 = argtoll(args[3]); - t2 = argtoll(args[4]); - t3 = argtoll(args[5]); - t4 = argtoll(args[6]); - } else - return q; - if (t1 == -1 && t4 == -1) { - t1 = 0; - t4 = render_priv->state.event->Duration; - t3 = t4 - t3; - } - if ((render_priv->state.parsed_tags & PARSED_FADE) == 0) { - render_priv->state.fade = - interpolate_alpha(render_priv->time - - render_priv->state.event->Start, t1, t2, - t3, t4, a1, a2, a3); - render_priv->state.parsed_tags |= PARSED_FADE; - } - } else if (complex_tag("org")) { - double v1, v2; - if (nargs == 2) { - v1 = argtod(args[0]); - v2 = argtod(args[1]); - } else - return q; - if (!render_priv->state.have_origin) { - render_priv->state.org_x = v1; - render_priv->state.org_y = v2; - render_priv->state.have_origin = 1; - render_priv->state.detect_collisions = 0; - } - } else if (complex_tag("t")) { - double accel; - int cnt = nargs - 1; - long long t1, t2, t, delta_t; - double k; - if (cnt == 3) { - t1 = argtoll(args[0]); - t2 = argtoll(args[1]); - accel = argtod(args[2]); - } else if (cnt == 2) { - t1 = argtoll(args[0]); - t2 = argtoll(args[1]); - accel = 1.; - } else if (cnt == 1) { - t1 = 0; - t2 = 0; - accel = argtod(args[0]); - } else if (cnt == 0) { - t1 = 0; - t2 = 0; - accel = 1.; - } else - return q; - render_priv->state.detect_collisions = 0; - if (t2 == 0) - t2 = render_priv->state.event->Duration; - delta_t = t2 - t1; - t = render_priv->time - render_priv->state.event->Start; // FIXME: move to render_context - if (t <= t1) - k = 0.; - else if (t >= t2) - k = 1.; - else { - assert(delta_t != 0.); - k = pow(((double) (t - t1)) / delta_t, accel); - } - p = args[cnt].start; - while (p < args[cnt].end) - p = parse_tag(render_priv, p, args[cnt].end, k); // maybe k*pwr ? no, specs forbid nested \t's - } else if (complex_tag("clip")) { - if (nargs == 4) { - int x0, y0, x1, y1; - x0 = argtoi(args[0]); - y0 = argtoi(args[1]); - x1 = argtoi(args[2]); - y1 = argtoi(args[3]); - render_priv->state.clip_x0 = - render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr; - render_priv->state.clip_x1 = - render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr; - render_priv->state.clip_y0 = - render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr; - render_priv->state.clip_y1 = - render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr; - render_priv->state.clip_mode = 0; - } else if (!render_priv->state.clip_drawing) { - if (parse_vector_clip(render_priv, args, nargs)) - render_priv->state.clip_drawing_mode = 0; - } - } else if (tag("c") || tag("1c")) { - if (nargs) { - uint32_t val = parse_color_tag(args->start); - change_color(&render_priv->state.c[0], val, pwr); - } else - change_color(&render_priv->state.c[0], - render_priv->state.style->PrimaryColour, 1); - } else if (tag("2c")) { - if (nargs) { - uint32_t val = parse_color_tag(args->start); - change_color(&render_priv->state.c[1], val, pwr); - } else - change_color(&render_priv->state.c[1], - render_priv->state.style->SecondaryColour, 1); - } else if (tag("3c")) { - if (nargs) { - uint32_t val = parse_color_tag(args->start); - change_color(&render_priv->state.c[2], val, pwr); - } else - change_color(&render_priv->state.c[2], - render_priv->state.style->OutlineColour, 1); - } else if (tag("4c")) { - if (nargs) { - uint32_t val = parse_color_tag(args->start); - change_color(&render_priv->state.c[3], val, pwr); - } else - change_color(&render_priv->state.c[3], - render_priv->state.style->BackColour, 1); - } else if (tag("1a")) { - if (nargs) { - uint32_t val = parse_alpha_tag(args->start); - change_alpha(&render_priv->state.c[0], val, pwr); - } else - change_alpha(&render_priv->state.c[0], - _a(render_priv->state.style->PrimaryColour), 1); - } else if (tag("2a")) { - if (nargs) { - uint32_t val = parse_alpha_tag(args->start); - change_alpha(&render_priv->state.c[1], val, pwr); - } else - change_alpha(&render_priv->state.c[1], - _a(render_priv->state.style->SecondaryColour), 1); - } else if (tag("3a")) { - if (nargs) { - uint32_t val = parse_alpha_tag(args->start); - change_alpha(&render_priv->state.c[2], val, pwr); - } else - change_alpha(&render_priv->state.c[2], - _a(render_priv->state.style->OutlineColour), 1); - } else if (tag("4a")) { - if (nargs) { - uint32_t val = parse_alpha_tag(args->start); - change_alpha(&render_priv->state.c[3], val, pwr); - } else - change_alpha(&render_priv->state.c[3], - _a(render_priv->state.style->BackColour), 1); - } else if (tag("r")) { - if (nargs) { - int len = args->end - args->start; - reset_render_context(render_priv, - lookup_style_strict(render_priv->track, args->start, len)); - } else - reset_render_context(render_priv, NULL); - } else if (tag("be")) { - double dval; - if (nargs) { - int val; - dval = argtod(*args); - // VSFilter always adds +0.5, even if the value is negative - val = (int) (render_priv->state.be * (1 - pwr) + dval * pwr + 0.5); - // Clamp to a safe upper limit, since high values need excessive CPU + render_priv->state.flags &= ~DECO_UNDERLINE; + } else if (tag("pbo")) { + double val = argtod(*args); + render_priv->state.pbo = val; + } else if (tag("p")) { + int val = argtoi(*args); val = (val < 0) ? 0 : val; - val = (val > MAX_BE) ? MAX_BE : val; - render_priv->state.be = val; - } else - render_priv->state.be = 0; - } else if (tag("b")) { - int val = argtoi(*args); - if (!nargs || !(val == 0 || val == 1 || val >= 100)) - val = render_priv->state.style->Bold; - render_priv->state.bold = val; - update_font(render_priv); - } else if (tag("i")) { - int val = argtoi(*args); - if (!nargs || !(val == 0 || val == 1)) - val = render_priv->state.style->Italic; - render_priv->state.italic = val; - update_font(render_priv); - } else if (tag("kf") || tag("K")) { - double val = 100; - if (nargs) - val = argtod(*args); - render_priv->state.effect_type = EF_KARAOKE_KF; - if (render_priv->state.effect_timing) - render_priv->state.effect_skip_timing += - render_priv->state.effect_timing; - render_priv->state.effect_timing = val * 10; - } else if (tag("ko")) { - double val = 100; - if (nargs) - val = argtod(*args); - render_priv->state.effect_type = EF_KARAOKE_KO; - if (render_priv->state.effect_timing) - render_priv->state.effect_skip_timing += - render_priv->state.effect_timing; - render_priv->state.effect_timing = val * 10; - } else if (tag("k")) { - double val = 100; - if (nargs) - val = argtod(*args); - render_priv->state.effect_type = EF_KARAOKE; - if (render_priv->state.effect_timing) - render_priv->state.effect_skip_timing += - render_priv->state.effect_timing; - render_priv->state.effect_timing = val * 10; - } else if (tag("shad")) { - double val, xval, yval; - if (nargs) { - val = argtod(*args); - xval = render_priv->state.shadow_x * (1 - pwr) + val * pwr; - yval = render_priv->state.shadow_y * (1 - pwr) + val * pwr; - // VSFilter compatibility: clip for \shad but not for \[xy]shad - xval = (xval < 0) ? 0 : xval; - yval = (yval < 0) ? 0 : yval; - } else - xval = yval = render_priv->state.style->Shadow; - render_priv->state.shadow_x = xval; - render_priv->state.shadow_y = yval; - } else if (tag("s")) { - int val = argtoi(*args); - if (!nargs || !(val == 0 || val == 1)) - val = render_priv->state.style->StrikeOut; - if (val) - render_priv->state.flags |= DECO_STRIKETHROUGH; - else - render_priv->state.flags &= ~DECO_STRIKETHROUGH; - } else if (tag("u")) { - int val = argtoi(*args); - if (!nargs || !(val == 0 || val == 1)) - val = render_priv->state.style->Underline; - if (val) - render_priv->state.flags |= DECO_UNDERLINE; - else - render_priv->state.flags &= ~DECO_UNDERLINE; - } else if (tag("pbo")) { - double val = argtod(*args); - render_priv->state.pbo = val; - } else if (tag("p")) { - int val = argtoi(*args); - val = (val < 0) ? 0 : val; - render_priv->state.drawing_scale = val; - } else if (tag("q")) { - int val = argtoi(*args); - if (!nargs || !(val >= 0 && val <= 3)) - val = render_priv->track->WrapStyle; - render_priv->state.wrap_style = val; - } else if (tag("fe")) { - int val; - if (nargs) - val = argtoi(*args); - else - val = render_priv->state.style->Encoding; - render_priv->state.font_encoding = val; + render_priv->state.drawing_scale = val; + } else if (tag("q")) { + int val = argtoi(*args); + if (!nargs || !(val >= 0 && val <= 3)) + val = render_priv->track->WrapStyle; + render_priv->state.wrap_style = val; + } else if (tag("fe")) { + int val; + if (nargs) + val = argtoi(*args); + else + val = render_priv->state.style->Encoding; + render_priv->state.font_encoding = val; + } } - return q; + return p; } void apply_transition_effects(ASS_Renderer *render_priv, ASS_Event *event) diff --git a/libass/ass_parse.h b/libass/ass_parse.h index 947f7ae6..1b1b131a 100644 --- a/libass/ass_parse.h +++ b/libass/ass_parse.h @@ -31,7 +31,7 @@ double ensure_font_size(ASS_Renderer *priv, double size); void apply_transition_effects(ASS_Renderer *render_priv, ASS_Event *event); void process_karaoke_effects(ASS_Renderer *render_priv); unsigned get_next_char(ASS_Renderer *render_priv, char **str); -char *parse_tag(ASS_Renderer *render_priv, char *p, char *end, double pwr); +char *parse_tags(ASS_Renderer *render_priv, char *p, char *end, double pwr); int event_has_hard_overrides(char *str); extern void change_alpha(uint32_t *var, int32_t new, double pwr); extern uint32_t mult_alpha(uint32_t a, uint32_t b); diff --git a/libass/ass_render.c b/libass/ass_render.c index be76f763..d5f881fb 100644 --- a/libass/ass_render.c +++ b/libass/ass_render.c @@ -1712,8 +1712,7 @@ static int parse_events(ASS_Renderer *render_priv, ASS_Event *event) code = 0; while (*p) { if ((*p == '{') && (q = strchr(p, '}'))) { - while (p < q) - p = parse_tag(render_priv, p, q, 1.); + p = parse_tags(render_priv, p, q, 1.); assert(*p == '}'); p++; } else if (render_priv->state.drawing_scale) {
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