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+/*
+ * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
+ *
+ * This file is part of MPlayer.
+ *
+ * MPlayer is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MPlayer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with libass; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <inttypes.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+
+#include <ass/ass.h>
+#include <ass/ass_types.h>
+
+#include "mp_msg.h"
+#include "get_path.h"
+#include "ass_mp.h"
+#include "subreader.h"
+
+#ifdef CONFIG_FONTCONFIG
+#include <fontconfig/fontconfig.h>
+#endif
+
+// libass-related command line options
+ASS_Library *ass_library;
+float ass_font_scale = 1.;
+float ass_line_spacing = 0.;
+int ass_top_margin = 0;
+int ass_bottom_margin = 0;
+int use_embedded_fonts = 1;
+char **ass_force_style_list = NULL;
+int ass_use_margins = 0;
+char *ass_color = NULL;
+char *ass_border_color = NULL;
+char *ass_styles_file = NULL;
+int ass_hinting = ASS_HINTING_LIGHT + 4; // light hinting for unscaled osd
+
+#ifdef CONFIG_FONTCONFIG
+extern int font_fontconfig;
+#else
+static int font_fontconfig = -1;
+#endif
+extern char *font_name;
+extern char *sub_font_name;
+extern float text_font_scale_factor;
+extern int subtitle_autoscale;
+
+#ifdef CONFIG_ICONV
+extern char *sub_cp;
+#else
+static char *sub_cp = 0;
+#endif
+
+void process_force_style(ASS_Track *track);
+
+ASS_Track *ass_default_track(ASS_Library *library)
+{
+ ASS_Track *track = ass_new_track(library);
+
+ track->track_type = TRACK_TYPE_ASS;
+ track->Timer = 100.;
+ track->PlayResY = 288;
+ track->WrapStyle = 0;
+
+ if (ass_styles_file)
+ ass_read_styles(track, ass_styles_file, sub_cp);
+
+ if (track->n_styles == 0) {
+ ASS_Style *style;
+ int sid;
+ double fs;
+ uint32_t c1, c2;
+
+ sid = ass_alloc_style(track);
+ style = track->styles + sid;
+ style->Name = strdup("Default");
+ style->FontName = (font_fontconfig >= 0
+ && sub_font_name) ? strdup(sub_font_name)
+ : (font_fontconfig >= 0
+ && font_name) ? strdup(font_name) : strdup("Sans");
+ style->treat_fontname_as_pattern = 1;
+
+ fs = track->PlayResY * text_font_scale_factor / 100.;
+ // approximate autoscale coefficients
+ if (subtitle_autoscale == 2)
+ fs *= 1.3;
+ else if (subtitle_autoscale == 3)
+ fs *= 1.4;
+ style->FontSize = fs;
+
+ if (ass_color)
+ c1 = strtoll(ass_color, NULL, 16);
+ else
+ c1 = 0xFFFF0000;
+ if (ass_border_color)
+ c2 = strtoll(ass_border_color, NULL, 16);
+ else
+ c2 = 0x00000000;
+
+ style->PrimaryColour = c1;
+ style->SecondaryColour = c1;
+ style->OutlineColour = c2;
+ style->BackColour = 0x00000000;
+ style->BorderStyle = 1;
+ style->Alignment = 2;
+ style->Outline = 2;
+ style->MarginL = 10;
+ style->MarginR = 10;
+ style->MarginV = 5;
+ style->ScaleX = 1.;
+ style->ScaleY = 1.;
+ }
+
+ ass_process_force_style(track);
+ return track;
+}
+
+static int check_duplicate_plaintext_event(ASS_Track *track)
+{
+ int i;
+ ASS_Event *evt = track->events + track->n_events - 1;
+
+ for (i = 0; i < track->n_events - 1; ++i) // ignoring last event, it is the one we are comparing with
+ if (track->events[i].Start == evt->Start &&
+ track->events[i].Duration == evt->Duration &&
+ strcmp(track->events[i].Text, evt->Text) == 0)
+ return 1;
+ return 0;
+}
+
+/**
+ * \brief Convert subtitle to ASS_Events for the given track
+ * \param track track
+ * \param sub subtitle to convert
+ * \return event id
+ * note: assumes that subtitle is _not_ fps-based; caller must manually correct
+ * Start and Duration in other case.
+ **/
+int ass_process_subtitle(ASS_Track *track, subtitle *sub)
+{
+ int eid;
+ ASS_Event *event;
+ int len = 0, j;
+ char *p;
+ char *end;
+
+ eid = ass_alloc_event(track);
+ event = track->events + eid;
+
+ event->Start = sub->start * 10;
+ event->Duration = (sub->end - sub->start) * 10;
+ event->Style = 0;
+
+ for (j = 0; j < sub->lines; ++j)
+ len += sub->text[j] ? strlen(sub->text[j]) : 0;
+
+ len += 2 * sub->lines; // '\N', including the one after the last line
+ len += 6; // {\anX}
+ len += 1; // '\0'
+
+ event->Text = malloc(len);
+ end = event->Text + len;
+ p = event->Text;
+
+ if (sub->alignment)
+ p += snprintf(p, end - p, "{\\an%d}", sub->alignment);
+
+ for (j = 0; j < sub->lines; ++j)
+ p += snprintf(p, end - p, "%s\\N", sub->text[j]);
+
+ if (sub->lines > 0)
+ p -= 2; // remove last "\N"
+ *p = 0;
+
+ if (check_duplicate_plaintext_event(track)) {
+ ass_free_event(track, eid);
+ track->n_events--;
+ return -1;
+ }
+
+ mp_msg(MSGT_ASS, MSGL_V,
+ "plaintext event at %" PRId64 ", +%" PRId64 ": %s \n",
+ (int64_t) event->Start, (int64_t) event->Duration, event->Text);
+
+ return eid;
+}
+
+
+/**
+ * \brief Convert subdata to ASS_Track
+ * \param subdata subtitles struct from subreader
+ * \param fps video framerate
+ * \return newly allocated ASS_Track, filled with subtitles from subdata
+ */
+ASS_Track *ass_read_subdata(ASS_Library *library, sub_data *subdata,
+ double fps)
+{
+ ASS_Track *track;
+ int i;
+
+ track = ass_default_track(library);
+ track->name = subdata->filename ? strdup(subdata->filename) : 0;
+
+ for (i = 0; i < subdata->sub_num; ++i) {
+ int eid = ass_process_subtitle(track, subdata->subtitles + i);
+ if (eid < 0)
+ continue;
+ if (!subdata->sub_uses_time) {
+ track->events[eid].Start *= 100. / fps;
+ track->events[eid].Duration *= 100. / fps;
+ }
+ }
+ return track;
+}
+
+void ass_configure(ASS_Renderer *priv, int w, int h, int unscaled)
+{
+ int hinting;
+ ass_set_frame_size(priv, w, h);
+ ass_set_margins(priv, ass_top_margin, ass_bottom_margin, 0, 0);
+ ass_set_use_margins(priv, ass_use_margins);
+ ass_set_font_scale(priv, ass_font_scale);
+ if (!unscaled && (ass_hinting & 4))
+ hinting = 0;
+ else
+ hinting = ass_hinting & 3;
+ ass_set_hinting(priv, hinting);
+ ass_set_line_spacing(priv, ass_line_spacing);
+}
+
+void ass_configure_fonts(ASS_Renderer *priv)
+{
+ char *dir, *path, *family;
+ dir = get_path("fonts");
+ if (font_fontconfig < 0 && sub_font_name)
+ path = strdup(sub_font_name);
+ else if (font_fontconfig < 0 && font_name)
+ path = strdup(font_name);
+ else
+ path = get_path("subfont.ttf");
+ if (font_fontconfig >= 0 && sub_font_name)
+ family = strdup(sub_font_name);
+ else if (font_fontconfig >= 0 && font_name)
+ family = strdup(font_name);
+ else
+ family = 0;
+
+ ass_set_fonts(priv, path, family, font_fontconfig + 1, NULL, 1);
+
+ free(dir);
+ free(path);
+ free(family);
+}
+
+static void message_callback(int level, const char *format, va_list va, void *ctx)
+{
+ mp_msg(MSGT_ASS, level, "[ass] ");
+ mp_msg_va(MSGT_ASS, level, format, va);
+ // libass messages lack trailing \n
+ mp_msg(MSGT_ASS, level, "\n");
+}
+
+ASS_Library *ass_init(void)
+{
+ ASS_Library *priv;
+ char *path = get_path("fonts");
+ priv = ass_library_init();
+ ass_set_message_cb(priv, message_callback, NULL);
+ ass_set_fonts_dir(priv, path);
+ ass_set_extract_fonts(priv, use_embedded_fonts);
+ ass_set_style_overrides(priv, ass_force_style_list);
+ free(path);
+ return priv;
+}
+
+int ass_force_reload = 0; // flag set if global ass-related settings were changed
+
+ASS_Image *ass_mp_render_frame(ASS_Renderer *priv, ASS_Track *track,
+ long long now, int *detect_change)
+{
+ if (ass_force_reload) {
+ ass_set_margins(priv, ass_top_margin, ass_bottom_margin, 0, 0);
+ ass_set_use_margins(priv, ass_use_margins);
+ ass_set_font_scale(priv, ass_font_scale);
+ ass_force_reload = 0;
+ }
+ return ass_render_frame(priv, track, now, detect_change);
+}
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