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-rw-r--r--libass/ass_parse.c926
1 files changed, 926 insertions, 0 deletions
diff --git a/libass/ass_parse.c b/libass/ass_parse.c
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+++ b/libass/ass_parse.c
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+/*
+ * Copyright (C) 2009 Grigori Goronzy <greg@geekmind.org>
+ *
+ * This file is part of libass.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#include "ass_render.h"
+#include "ass_parse.h"
+
+#define MAX_BE 127
+#define NBSP 0xa0 // unicode non-breaking space character
+
+#define skip_to(x) while ((*p != (x)) && (*p != '}') && (*p != 0)) { ++p;}
+#define skip(x) if (*p == (x)) ++p; else { return p; }
+#define skipopt(x) if (*p == (x)) { ++p; }
+
+/**
+ * \brief Check if starting part of (*p) matches sample.
+ * If true, shift p to the first symbol after the matching part.
+ */
+static inline int mystrcmp(char **p, const char *sample)
+{
+ int len = strlen(sample);
+ if (strncmp(*p, sample, len) == 0) {
+ (*p) += len;
+ return 1;
+ } else
+ return 0;
+}
+
+static void change_font_size(ASS_Renderer *render_priv, double sz)
+{
+ double size = sz * render_priv->font_scale;
+
+ if (size < 1)
+ size = 1;
+ else if (size > render_priv->height * 2)
+ size = render_priv->height * 2;
+
+ ass_font_set_size(render_priv->state.font, size);
+
+ render_priv->state.font_size = sz;
+}
+
+/**
+ * \brief Change current font, using setting from render_priv->state.
+ */
+void update_font(ASS_Renderer *render_priv)
+{
+ unsigned val;
+ ASS_FontDesc desc;
+ desc.family = strdup(render_priv->state.family);
+ desc.treat_family_as_pattern =
+ render_priv->state.treat_family_as_pattern;
+
+ val = render_priv->state.bold;
+ // 0 = normal, 1 = bold, >1 = exact weight
+ if (val == 1 || val == -1)
+ val = 200; // bold
+ else if (val <= 0)
+ val = 80; // normal
+ desc.bold = val;
+
+ val = render_priv->state.italic;
+ if (val == 1 || val == -1)
+ val = 110; // italic
+ else if (val <= 0)
+ val = 0; // normal
+ desc.italic = val;
+
+ render_priv->state.font =
+ ass_font_new(render_priv->cache.font_cache, render_priv->library,
+ render_priv->ftlibrary, render_priv->fontconfig_priv,
+ &desc);
+ free(desc.family);
+
+ if (render_priv->state.font)
+ change_font_size(render_priv, render_priv->state.font_size);
+}
+
+/**
+ * \brief Change border width
+ * negative value resets border to style value
+ */
+void change_border(ASS_Renderer *render_priv, double border_x,
+ double border_y)
+{
+ int bord;
+ if (!render_priv->state.font)
+ return;
+
+ if (border_x < 0 && border_y < 0) {
+ if (render_priv->state.style->BorderStyle == 1 ||
+ render_priv->state.style->BorderStyle == 3)
+ border_x = border_y = render_priv->state.style->Outline;
+ else
+ border_x = border_y = 1.;
+ }
+
+ render_priv->state.border_x = border_x;
+ render_priv->state.border_y = border_y;
+
+ bord = 64 * border_x * render_priv->border_scale;
+ if (bord > 0 && border_x == border_y) {
+ if (!render_priv->state.stroker) {
+ int error;
+ error =
+ FT_Stroker_New(render_priv->ftlibrary,
+ &render_priv->state.stroker);
+ if (error) {
+ ass_msg(render_priv->library, MSGL_V,
+ "failed to get stroker");
+ render_priv->state.stroker = 0;
+ }
+ }
+ if (render_priv->state.stroker)
+ FT_Stroker_Set(render_priv->state.stroker, bord,
+ FT_STROKER_LINECAP_ROUND,
+ FT_STROKER_LINEJOIN_ROUND, 0);
+ } else {
+ FT_Stroker_Done(render_priv->state.stroker);
+ render_priv->state.stroker = 0;
+ }
+}
+
+/**
+ * \brief Calculate a weighted average of two colors
+ * calculates c1*(1-a) + c2*a, but separately for each component except alpha
+ */
+static void change_color(uint32_t *var, uint32_t new, double pwr)
+{
+ (*var) = ((uint32_t) (_r(*var) * (1 - pwr) + _r(new) * pwr) << 24) +
+ ((uint32_t) (_g(*var) * (1 - pwr) + _g(new) * pwr) << 16) +
+ ((uint32_t) (_b(*var) * (1 - pwr) + _b(new) * pwr) << 8) + _a(*var);
+}
+
+// like change_color, but for alpha component only
+inline void change_alpha(uint32_t *var, uint32_t new, double pwr)
+{
+ *var =
+ (_r(*var) << 24) + (_g(*var) << 16) + (_b(*var) << 8) +
+ (uint32_t) (_a(*var) * (1 - pwr) + _a(new) * pwr);
+}
+
+/**
+ * \brief Multiply two alpha values
+ * \param a first value
+ * \param b second value
+ * \return result of multiplication
+ * Parameters and result are limited by 0xFF.
+ */
+inline uint32_t mult_alpha(uint32_t a, uint32_t b)
+{
+ return 0xFF - (0xFF - a) * (0xFF - b) / 0xFF;
+}
+
+/**
+ * \brief Calculate alpha value by piecewise linear function
+ * Used for \fad, \fade implementation.
+ */
+static unsigned
+interpolate_alpha(long long now, long long t1, long long t2, long long t3,
+ long long t4, unsigned a1, unsigned a2, unsigned a3)
+{
+ unsigned a;
+ double cf;
+ if (now <= t1) {
+ a = a1;
+ } else if (now >= t4) {
+ a = a3;
+ } else if (now < t2) { // and > t1
+ cf = ((double) (now - t1)) / (t2 - t1);
+ a = a1 * (1 - cf) + a2 * cf;
+ } else if (now > t3) {
+ cf = ((double) (now - t3)) / (t4 - t3);
+ a = a2 * (1 - cf) + a3 * cf;
+ } else { // t2 <= now <= t3
+ a = a2;
+ }
+
+ return a;
+}
+
+/**
+ * Parse a vector clip into an outline, using the proper scaling
+ * parameters. Translate it to correct for screen borders, if needed.
+ */
+static char *parse_vector_clip(ASS_Renderer *render_priv, char *p)
+{
+ int scale = 1;
+ int res = 0;
+ ASS_Drawing *drawing;
+
+ render_priv->state.clip_drawing = ass_drawing_new(
+ render_priv->fontconfig_priv,
+ render_priv->state.font,
+ render_priv->settings.hinting,
+ render_priv->ftlibrary);
+ drawing = render_priv->state.clip_drawing;
+ skipopt('(');
+ res = mystrtoi(&p, &scale);
+ skipopt(',')
+ if (!res)
+ scale = 1;
+ drawing->scale = scale;
+ drawing->scale_x = render_priv->font_scale_x * render_priv->font_scale;
+ drawing->scale_y = render_priv->font_scale;
+ while (*p != ')' && *p != '}' && p != 0)
+ ass_drawing_add_char(drawing, *p++);
+ skipopt(')');
+ if (ass_drawing_parse(drawing, 1)) {
+ // We need to translate the clip according to screen borders
+ if (render_priv->settings.left_margin != 0 ||
+ render_priv->settings.top_margin != 0) {
+ FT_Vector trans = {
+ .x = int_to_d6(render_priv->settings.left_margin),
+ .y = -int_to_d6(render_priv->settings.top_margin),
+ };
+ FT_Outline_Translate(&drawing->glyph->outline, trans.x, trans.y);
+ }
+ ass_msg(render_priv->library, MSGL_DBG2,
+ "Parsed vector clip: scale %d, scales (%f, %f) string [%s]\n",
+ scale, drawing->scale_x, drawing->scale_y, drawing->text);
+ }
+
+ return p;
+}
+
+/**
+ * \brief Parse style override tag.
+ * \param p string to parse
+ * \param pwr multiplier for some tag effects (comes from \t tags)
+ */
+static char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
+{
+ skip_to('\\');
+ skip('\\');
+ if ((*p == '}') || (*p == 0))
+ return p;
+
+ // New tags introduced in vsfilter 2.39
+ if (mystrcmp(&p, "xbord")) {
+ double val;
+ if (mystrtod(&p, &val))
+ val = render_priv->state.border_x * (1 - pwr) + val * pwr;
+ else
+ val = -1.;
+ change_border(render_priv, val, render_priv->state.border_y);
+ } else if (mystrcmp(&p, "ybord")) {
+ double val;
+ if (mystrtod(&p, &val))
+ val = render_priv->state.border_y * (1 - pwr) + val * pwr;
+ else
+ val = -1.;
+ change_border(render_priv, render_priv->state.border_x, val);
+ } else if (mystrcmp(&p, "xshad")) {
+ double val;
+ if (mystrtod(&p, &val))
+ val = render_priv->state.shadow_x * (1 - pwr) + val * pwr;
+ else
+ val = 0.;
+ render_priv->state.shadow_x = val;
+ } else if (mystrcmp(&p, "yshad")) {
+ double val;
+ if (mystrtod(&p, &val))
+ val = render_priv->state.shadow_y * (1 - pwr) + val * pwr;
+ else
+ val = 0.;
+ render_priv->state.shadow_y = val;
+ } else if (mystrcmp(&p, "fax")) {
+ double val;
+ if (mystrtod(&p, &val))
+ render_priv->state.fax =
+ val * pwr + render_priv->state.fax * (1 - pwr);
+ else
+ render_priv->state.fax = 0.;
+ } else if (mystrcmp(&p, "fay")) {
+ double val;
+ if (mystrtod(&p, &val))
+ render_priv->state.fay =
+ val * pwr + render_priv->state.fay * (1 - pwr);
+ else
+ render_priv->state.fay = 0.;
+ } else if (mystrcmp(&p, "iclip")) {
+ int x0, y0, x1, y1;
+ int res = 1;
+ char *start = p;
+ skipopt('(');
+ res &= mystrtoi(&p, &x0);
+ skipopt(',');
+ res &= mystrtoi(&p, &y0);
+ skipopt(',');
+ res &= mystrtoi(&p, &x1);
+ skipopt(',');
+ res &= mystrtoi(&p, &y1);
+ skipopt(')');
+ if (res) {
+ 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) {
+ p = parse_vector_clip(render_priv, start);
+ render_priv->state.clip_drawing_mode = 1;
+ } else
+ render_priv->state.clip_mode = 0;
+ } else if (mystrcmp(&p, "blur")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ 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 (mystrcmp(&p, "fsc")) {
+ char tp = *p++;
+ double val;
+ if (tp == 'x') {
+ if (mystrtod(&p, &val)) {
+ val /= 100;
+ render_priv->state.scale_x =
+ render_priv->state.scale_x * (1 - pwr) + val * pwr;
+ } else
+ render_priv->state.scale_x =
+ render_priv->state.style->ScaleX;
+ } else if (tp == 'y') {
+ if (mystrtod(&p, &val)) {
+ val /= 100;
+ render_priv->state.scale_y =
+ render_priv->state.scale_y * (1 - pwr) + val * pwr;
+ } else
+ render_priv->state.scale_y =
+ render_priv->state.style->ScaleY;
+ }
+ } else if (mystrcmp(&p, "fsp")) {
+ double val;
+ if (mystrtod(&p, &val))
+ render_priv->state.hspacing =
+ render_priv->state.hspacing * (1 - pwr) + val * pwr;
+ else
+ render_priv->state.hspacing = render_priv->state.style->Spacing;
+ } else if (mystrcmp(&p, "fs")) {
+ double val;
+ if (mystrtod(&p, &val))
+ val = render_priv->state.font_size * (1 - pwr) + val * pwr;
+ else
+ val = render_priv->state.style->FontSize;
+ if (render_priv->state.font)
+ change_font_size(render_priv, val);
+ } else if (mystrcmp(&p, "bord")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ if (render_priv->state.border_x == render_priv->state.border_y)
+ val = render_priv->state.border_x * (1 - pwr) + val * pwr;
+ } else
+ val = -1.; // reset to default
+ change_border(render_priv, val, val);
+ } else if (mystrcmp(&p, "move")) {
+ double x1, x2, y1, y2;
+ long long t1, t2, delta_t, t;
+ double x, y;
+ double k;
+ skip('(');
+ mystrtod(&p, &x1);
+ skip(',');
+ mystrtod(&p, &y1);
+ skip(',');
+ mystrtod(&p, &x2);
+ skip(',');
+ mystrtod(&p, &y2);
+ if (*p == ',') {
+ skip(',');
+ mystrtoll(&p, &t1);
+ skip(',');
+ mystrtoll(&p, &t2);
+ ass_msg(render_priv->library, MSGL_DBG2,
+ "movement6: (%f, %f) -> (%f, %f), (%" PRId64 " .. %"
+ PRId64 ")\n", x1, y1, x2, y2, (int64_t) t1,
+ (int64_t) t2);
+ } else {
+ t1 = 0;
+ t2 = render_priv->state.event->Duration;
+ ass_msg(render_priv->library, MSGL_DBG2,
+ "movement: (%f, %f) -> (%f, %f)", x1, y1, x2, y2);
+ }
+ skip(')');
+ 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 (mystrcmp(&p, "frx")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ val *= M_PI / 180;
+ render_priv->state.frx =
+ val * pwr + render_priv->state.frx * (1 - pwr);
+ } else
+ render_priv->state.frx = 0.;
+ } else if (mystrcmp(&p, "fry")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ val *= M_PI / 180;
+ render_priv->state.fry =
+ val * pwr + render_priv->state.fry * (1 - pwr);
+ } else
+ render_priv->state.fry = 0.;
+ } else if (mystrcmp(&p, "frz") || mystrcmp(&p, "fr")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ 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 (mystrcmp(&p, "fn")) {
+ char *start = p;
+ char *family;
+ skip_to('\\');
+ if (p > start) {
+ family = malloc(p - start + 1);
+ strncpy(family, start, p - start);
+ family[p - start] = '\0';
+ } else
+ family = strdup(render_priv->state.style->FontName);
+ if (render_priv->state.family)
+ free(render_priv->state.family);
+ render_priv->state.family = family;
+ update_font(render_priv);
+ } else if (mystrcmp(&p, "alpha")) {
+ uint32_t val;
+ int i;
+ int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
+ if (strtocolor(render_priv->library, &p, &val, hex)) {
+ unsigned char a = val >> 24;
+ for (i = 0; i < 4; ++i)
+ change_alpha(&render_priv->state.c[i], a, pwr);
+ } else {
+ change_alpha(&render_priv->state.c[0],
+ render_priv->state.style->PrimaryColour, pwr);
+ change_alpha(&render_priv->state.c[1],
+ render_priv->state.style->SecondaryColour, pwr);
+ change_alpha(&render_priv->state.c[2],
+ render_priv->state.style->OutlineColour, pwr);
+ change_alpha(&render_priv->state.c[3],
+ render_priv->state.style->BackColour, pwr);
+ }
+ // FIXME: simplify
+ } else if (mystrcmp(&p, "an")) {
+ int val;
+ if (mystrtoi(&p, &val) && val) {
+ int v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment
+ ass_msg(render_priv->library, MSGL_DBG2, "an %d", val);
+ if (v != 0)
+ v = 3 - v;
+ val = ((val - 1) % 3) + 1; // horizontal alignment
+ val += v * 4;
+ ass_msg(render_priv->library, MSGL_DBG2, "align %d", val);
+ render_priv->state.alignment = val;
+ } else
+ render_priv->state.alignment =
+ render_priv->state.style->Alignment;
+ } else if (mystrcmp(&p, "a")) {
+ int val;
+ if (mystrtoi(&p, &val) && val)
+ // take care of a vsfilter quirk: handle illegal \a8 like \a5
+ render_priv->state.alignment = (val == 8) ? 5 : val;
+ else
+ render_priv->state.alignment =
+ render_priv->state.style->Alignment;
+ } else if (mystrcmp(&p, "pos")) {
+ double v1, v2;
+ skip('(');
+ mystrtod(&p, &v1);
+ skip(',');
+ mystrtod(&p, &v2);
+ skip(')');
+ ass_msg(render_priv->library, MSGL_DBG2, "pos(%f, %f)", v1, v2);
+ 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 (mystrcmp(&p, "fad")) {
+ int a1, a2, a3;
+ long long t1, t2, t3, t4;
+ if (*p == 'e')
+ ++p; // either \fad or \fade
+ skip('(');
+ mystrtoi(&p, &a1);
+ skip(',');
+ mystrtoi(&p, &a2);
+ if (*p == ')') {
+ // 2-argument version (\fad, according to specs)
+ // a1 and a2 are fade-in and fade-out durations
+ t1 = 0;
+ t4 = render_priv->state.event->Duration;
+ t2 = a1;
+ t3 = t4 - a2;
+ a1 = 0xFF;
+ a2 = 0;
+ a3 = 0xFF;
+ } else {
+ // 6-argument version (\fade)
+ // a1 and a2 (and a3) are opacity values
+ skip(',');
+ mystrtoi(&p, &a3);
+ skip(',');
+ mystrtoll(&p, &t1);
+ skip(',');
+ mystrtoll(&p, &t2);
+ skip(',');
+ mystrtoll(&p, &t3);
+ skip(',');
+ mystrtoll(&p, &t4);
+ }
+ skip(')');
+ render_priv->state.fade =
+ interpolate_alpha(render_priv->time -
+ render_priv->state.event->Start, t1, t2,
+ t3, t4, a1, a2, a3);
+ } else if (mystrcmp(&p, "org")) {
+ int v1, v2;
+ skip('(');
+ mystrtoi(&p, &v1);
+ skip(',');
+ mystrtoi(&p, &v2);
+ skip(')');
+ ass_msg(render_priv->library, MSGL_DBG2, "org(%d, %d)", v1, v2);
+ 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 (mystrcmp(&p, "t")) {
+ double v[3];
+ int v1, v2;
+ double v3;
+ int cnt;
+ long long t1, t2, t, delta_t;
+ double k;
+ skip('(');
+ for (cnt = 0; cnt < 3; ++cnt) {
+ if (*p == '\\')
+ break;
+ v[cnt] = strtod(p, &p);
+ skip(',');
+ }
+ if (cnt == 3) {
+ v1 = v[0];
+ v2 = (v[1] < v1) ? render_priv->state.event->Duration : v[1];
+ v3 = v[2];
+ } else if (cnt == 2) {
+ v1 = v[0];
+ v2 = (v[1] < v1) ? render_priv->state.event->Duration : v[1];
+ v3 = 1.;
+ } else if (cnt == 1) {
+ v1 = 0;
+ v2 = render_priv->state.event->Duration;
+ v3 = v[0];
+ } else { // cnt == 0
+ v1 = 0;
+ v2 = render_priv->state.event->Duration;
+ v3 = 1.;
+ }
+ render_priv->state.detect_collisions = 0;
+ t1 = v1;
+ t2 = v2;
+ delta_t = v2 - v1;
+ if (v3 < 0.)
+ v3 = 0.;
+ 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, v3);
+ }
+ while (*p == '\\')
+ p = parse_tag(render_priv, p, k); // maybe k*pwr ? no, specs forbid nested \t's
+ skip_to(')'); // in case there is some unknown tag or a comment
+ skip(')');
+ } else if (mystrcmp(&p, "clip")) {
+ char *start = p;
+ int x0, y0, x1, y1;
+ int res = 1;
+ skipopt('(');
+ res &= mystrtoi(&p, &x0);
+ skipopt(',');
+ res &= mystrtoi(&p, &y0);
+ skipopt(',');
+ res &= mystrtoi(&p, &x1);
+ skipopt(',');
+ res &= mystrtoi(&p, &y1);
+ skipopt(')');
+ if (res) {
+ 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;
+ // Might be a vector clip
+ } else if (!render_priv->state.clip_drawing) {
+ p = parse_vector_clip(render_priv, start);
+ render_priv->state.clip_drawing_mode = 0;
+ } else {
+ render_priv->state.clip_x0 = 0;
+ render_priv->state.clip_y0 = 0;
+ render_priv->state.clip_x1 = render_priv->track->PlayResX;
+ render_priv->state.clip_y1 = render_priv->track->PlayResY;
+ }
+ } else if (mystrcmp(&p, "c")) {
+ uint32_t val;
+ int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
+ if (!strtocolor(render_priv->library, &p, &val, hex))
+ val = render_priv->state.style->PrimaryColour;
+ ass_msg(render_priv->library, MSGL_DBG2, "color: %X", val);
+ change_color(&render_priv->state.c[0], val, pwr);
+ } else if ((*p >= '1') && (*p <= '4') && (++p)
+ && (mystrcmp(&p, "c") || mystrcmp(&p, "a"))) {
+ char n = *(p - 2);
+ int cidx = n - '1';
+ char cmd = *(p - 1);
+ uint32_t val;
+ int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
+ assert((n >= '1') && (n <= '4'));
+ if (!strtocolor(render_priv->library, &p, &val, hex))
+ switch (n) {
+ case '1':
+ val = render_priv->state.style->PrimaryColour;
+ break;
+ case '2':
+ val = render_priv->state.style->SecondaryColour;
+ break;
+ case '3':
+ val = render_priv->state.style->OutlineColour;
+ break;
+ case '4':
+ val = render_priv->state.style->BackColour;
+ break;
+ default:
+ val = 0;
+ break; // impossible due to assert; avoid compilation warning
+ }
+ switch (cmd) {
+ case 'c':
+ change_color(render_priv->state.c + cidx, val, pwr);
+ break;
+ case 'a':
+ change_alpha(render_priv->state.c + cidx, val >> 24, pwr);
+ break;
+ default:
+ ass_msg(render_priv->library, MSGL_WARN, "Bad command: %c%c",
+ n, cmd);
+ break;
+ }
+ ass_msg(render_priv->library, MSGL_DBG2, "single c/a at %f: %c%c = %X",
+ pwr, n, cmd, render_priv->state.c[cidx]);
+ } else if (mystrcmp(&p, "r")) {
+ reset_render_context(render_priv);
+ } else if (mystrcmp(&p, "be")) {
+ int val;
+ if (mystrtoi(&p, &val)) {
+ // 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 (mystrcmp(&p, "b")) {
+ int b;
+ if (mystrtoi(&p, &b)) {
+ if (pwr >= .5)
+ render_priv->state.bold = b;
+ } else
+ render_priv->state.bold = render_priv->state.style->Bold;
+ update_font(render_priv);
+ } else if (mystrcmp(&p, "i")) {
+ int i;
+ if (mystrtoi(&p, &i)) {
+ if (pwr >= .5)
+ render_priv->state.italic = i;
+ } else
+ render_priv->state.italic = render_priv->state.style->Italic;
+ update_font(render_priv);
+ } else if (mystrcmp(&p, "kf") || mystrcmp(&p, "K")) {
+ int val = 0;
+ mystrtoi(&p, &val);
+ 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 (mystrcmp(&p, "ko")) {
+ int val = 0;
+ mystrtoi(&p, &val);
+ 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 (mystrcmp(&p, "k")) {
+ int val = 0;
+ mystrtoi(&p, &val);
+ 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 (mystrcmp(&p, "shad")) {
+ double val;
+ if (mystrtod(&p, &val)) {
+ if (render_priv->state.shadow_x == render_priv->state.shadow_y)
+ val = render_priv->state.shadow_x * (1 - pwr) + val * pwr;
+ } else
+ val = 0.;
+ render_priv->state.shadow_x = render_priv->state.shadow_y = val;
+ } else if (mystrcmp(&p, "s")) {
+ int val;
+ if (mystrtoi(&p, &val) && val)
+ render_priv->state.flags |= DECO_STRIKETHROUGH;
+ else
+ render_priv->state.flags &= ~DECO_STRIKETHROUGH;
+ } else if (mystrcmp(&p, "u")) {
+ int val;
+ if (mystrtoi(&p, &val) && val)
+ render_priv->state.flags |= DECO_UNDERLINE;
+ else
+ render_priv->state.flags &= ~DECO_UNDERLINE;
+ } else if (mystrcmp(&p, "pbo")) {
+ double val = 0;
+ if (mystrtod(&p, &val))
+ render_priv->state.drawing->pbo = val;
+ } else if (mystrcmp(&p, "p")) {
+ int val;
+ if (!mystrtoi(&p, &val))
+ val = 0;
+ if (val)
+ render_priv->state.drawing->scale = val;
+ render_priv->state.drawing_mode = !!val;
+ } else if (mystrcmp(&p, "q")) {
+ int val;
+ if (!mystrtoi(&p, &val))
+ val = render_priv->track->WrapStyle;
+ render_priv->state.wrap_style = val;
+ }
+
+ return p;
+}
+
+void apply_transition_effects(ASS_Renderer *render_priv, ASS_Event *event)
+{
+ int v[4];
+ int cnt;
+ char *p = event->Effect;
+
+ if (!p || !*p)
+ return;
+
+ cnt = 0;
+ while (cnt < 4 && (p = strchr(p, ';'))) {
+ v[cnt++] = atoi(++p);
+ }
+
+ if (strncmp(event->Effect, "Banner;", 7) == 0) {
+ int delay;
+ if (cnt < 1) {
+ ass_msg(render_priv->library, MSGL_V,
+ "Error parsing effect: '%s'", event->Effect);
+ return;
+ }
+ if (cnt >= 2 && v[1] == 0) // right-to-left
+ render_priv->state.scroll_direction = SCROLL_RL;
+ else // left-to-right
+ render_priv->state.scroll_direction = SCROLL_LR;
+
+ delay = v[0];
+ if (delay == 0)
+ delay = 1; // ?
+ render_priv->state.scroll_shift =
+ (render_priv->time - render_priv->state.event->Start) / delay;
+ render_priv->state.evt_type = EVENT_HSCROLL;
+ return;
+ }
+
+ if (strncmp(event->Effect, "Scroll up;", 10) == 0) {
+ render_priv->state.scroll_direction = SCROLL_BT;
+ } else if (strncmp(event->Effect, "Scroll down;", 12) == 0) {
+ render_priv->state.scroll_direction = SCROLL_TB;
+ } else {
+ ass_msg(render_priv->library, MSGL_V,
+ "Unknown transition effect: '%s'", event->Effect);
+ return;
+ }
+ // parse scroll up/down parameters
+ {
+ int delay;
+ int y0, y1;
+ if (cnt < 3) {
+ ass_msg(render_priv->library, MSGL_V,
+ "Error parsing effect: '%s'", event->Effect);
+ return;
+ }
+ delay = v[2];
+ if (delay == 0)
+ delay = 1; // ?
+ render_priv->state.scroll_shift =
+ (render_priv->time - render_priv->state.event->Start) / delay;
+ if (v[0] < v[1]) {
+ y0 = v[0];
+ y1 = v[1];
+ } else {
+ y0 = v[1];
+ y1 = v[0];
+ }
+ if (y1 == 0)
+ y1 = render_priv->track->PlayResY; // y0=y1=0 means fullscreen scrolling
+ render_priv->state.clip_y0 = y0;
+ render_priv->state.clip_y1 = y1;
+ render_priv->state.evt_type = EVENT_VSCROLL;
+ render_priv->state.detect_collisions = 0;
+ }
+
+}
+
+/**
+ * \brief Get next ucs4 char from string, parsing and executing style overrides
+ * \param str string pointer
+ * \return ucs4 code of the next char
+ * On return str points to the unparsed part of the string
+ */
+unsigned get_next_char(ASS_Renderer *render_priv, char **str)
+{
+ char *p = *str;
+ unsigned chr;
+ if (*p == '{') { // '\0' goes here
+ p++;
+ while (1) {
+ p = parse_tag(render_priv, p, 1.);
+ if (*p == '}') { // end of tag
+ p++;
+ if (*p == '{') {
+ p++;
+ continue;
+ } else
+ break;
+ } else if (*p != '\\')
+ ass_msg(render_priv->library, MSGL_V,
+ "Unable to parse: '%s'", p);
+ if (*p == 0)
+ break;
+ }
+ }
+ if (*p == '\t') {
+ ++p;
+ *str = p;
+ return ' ';
+ }
+ if (*p == '\\') {
+ if ((p[1] == 'N') || ((p[1] == 'n') &&
+ (render_priv->state.wrap_style == 2))) {
+ p += 2;
+ *str = p;
+ return '\n';
+ } else if (p[1] == 'n') {
+ p += 2;
+ *str = p;
+ return ' ';
+ } else if (p[1] == 'h') {
+ p += 2;
+ *str = p;
+ return NBSP;
+ }
+ }
+ chr = ass_utf8_get_char((char **) &p);
+ *str = p;
+ return chr;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 11:34:59 +0000