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// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include "mp_msg.h"
#include "ass.h"
#include "ass_utils.h"
#include "ass_mp.h"
// libass-related command line options
int ass_enabled = 0;
float ass_font_scale = 1.;
float ass_line_spacing = 0.;
int ass_top_margin = 0;
int ass_bottom_margin = 0;
int extract_embedded_fonts = 0;
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;
extern int font_fontconfig;
extern char* font_name;
extern float text_font_scale_factor;
extern int subtitle_autoscale;
extern double ass_internal_font_size_coeff;
extern void process_force_style(ass_track_t* track);
ass_track_t* ass_default_track() {
ass_track_t* track = ass_new_track();
track->track_type = TRACK_TYPE_ASS;
track->Timer = 100.;
track->PlayResX = 384;
track->PlayResY = 288;
track->WrapStyle = 0;
if (ass_styles_file)
ass_read_styles(track, ass_styles_file);
if (track->n_styles == 0) {
ass_style_t* 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 && font_name) ? strdup(font_name) : strdup("Sans");
fs = track->PlayResY * text_font_scale_factor / 100. / ass_internal_font_size_coeff;
// 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.;
}
process_force_style(track);
return track;
}
static int check_duplicate_plaintext_event(ass_track_t* track)
{
int i;
ass_event_t* 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_event_t for the given track
* \param ass_track_t 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_t* track, subtitle* sub)
{
int eid;
ass_event_t* 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 ", sub->text[j]);
p--; // remove last ' '
*p = 0;
if (check_duplicate_plaintext_event(track)) {
ass_free_event(track, eid);
track->n_events--;
return -1;
}
mp_msg(MSGT_GLOBAL, 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_t* ass_read_subdata(sub_data* subdata, double fps) {
ass_track_t* track;
int i;
track = ass_default_track();
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;
}
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