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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <assert.h>
#include <ass/ass.h>
#include <ass/ass_types.h>
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "options/path.h"
#include "ass_mp.h"
#include "osd.h"
#include "stream/stream.h"
#include "options/options.h"
// res_y should be track->PlayResY
// It determines scaling of font sizes and more.
void mp_ass_set_style(ASS_Style *style, double res_y,
const struct osd_style_opts *opts)
{
if (!style)
return;
if (opts->font) {
if (!style->FontName || strcmp(style->FontName, opts->font) != 0) {
free(style->FontName);
style->FontName = strdup(opts->font);
}
}
// libass_font_size = FontSize * (window_height / res_y)
// scale translates parameters from PlayResY=720 to res_y
double scale = res_y / 720.0;
style->FontSize = opts->font_size * scale;
style->PrimaryColour = MP_ASS_COLOR(opts->color);
style->SecondaryColour = style->PrimaryColour;
style->OutlineColour = MP_ASS_COLOR(opts->border_color);
if (opts->back_color.a) {
style->BackColour = MP_ASS_COLOR(opts->back_color);
style->BorderStyle = 4; // opaque box
} else {
style->BackColour = MP_ASS_COLOR(opts->shadow_color);
style->BorderStyle = 1; // outline
}
style->Outline = opts->border_size * scale;
style->Shadow = opts->shadow_offset * scale;
style->Spacing = opts->spacing * scale;
style->MarginL = opts->margin_x * scale;
style->MarginR = style->MarginL;
style->MarginV = opts->margin_y * scale;
style->ScaleX = 1.;
style->ScaleY = 1.;
style->Alignment = 1 + (opts->align_x + 1) + (opts->align_y + 2) % 3 * 4;
style->Blur = opts->blur;
style->Bold = opts->bold;
}
void mp_ass_configure_fonts(ASS_Renderer *priv, struct osd_style_opts *opts,
struct mpv_global *global, struct mp_log *log)
{
void *tmp = talloc_new(NULL);
char *default_font = mp_find_config_file(tmp, global, "subfont.ttf");
char *config = mp_find_config_file(tmp, global, "fonts.conf");
if (default_font && !mp_path_exists(default_font))
default_font = NULL;
mp_verbose(log, "Setting up fonts...\n");
ass_set_fonts(priv, default_font, opts->font, 1, config, 1);
mp_verbose(log, "Done.\n");
talloc_free(tmp);
}
void mp_ass_render_frame(ASS_Renderer *renderer, ASS_Track *track, double time,
struct sub_bitmaps *res)
{
int changed;
ASS_Image *imgs = ass_render_frame(renderer, track, time, &changed);
if (changed)
res->change_id++;
assert(res->format == 0 || res->format == SUBBITMAP_LIBASS);
res->format = SUBBITMAP_LIBASS;
int num_parts_alloc = MP_TALLOC_AVAIL(res->parts);
for (struct ass_image *img = imgs; img; img = img->next) {
if (img->w == 0 || img->h == 0)
continue;
if (res->num_parts >= num_parts_alloc) {
num_parts_alloc = MPMAX(num_parts_alloc * 2, 32);
res->parts = talloc_realloc(NULL, res->parts, struct sub_bitmap,
num_parts_alloc);
}
struct sub_bitmap *p = &res->parts[res->num_parts];
p->bitmap = img->bitmap;
p->stride = img->stride;
p->libass.color = img->color;
p->dw = p->w = img->w;
p->dh = p->h = img->h;
p->x = img->dst_x;
p->y = img->dst_y;
res->num_parts++;
}
}
static const int map_ass_level[] = {
MSGL_ERR, // 0 "FATAL errors"
MSGL_WARN,
MSGL_INFO,
MSGL_V,
MSGL_V,
MSGL_V, // 5 application recommended level
MSGL_DEBUG,
MSGL_TRACE, // 7 "verbose DEBUG"
};
static void message_callback(int level, const char *format, va_list va, void *ctx)
{
struct mp_log *log = ctx;
if (!log)
return;
level = map_ass_level[level];
mp_msg_va(log, level, format, va);
// libass messages lack trailing \n
mp_msg(log, level, "\n");
}
ASS_Library *mp_ass_init(struct mpv_global *global, struct mp_log *log)
{
char *path = mp_find_config_file(NULL, global, "fonts");
ASS_Library *priv = ass_library_init();
if (!priv)
abort();
ass_set_message_cb(priv, message_callback, log);
if (path)
ass_set_fonts_dir(priv, path);
ass_set_extract_fonts(priv, global->opts->use_embedded_fonts);
talloc_free(path);
return priv;
}
void mp_ass_flush_old_events(ASS_Track *track, long long ts)
{
int n = 0;
for (; n < track->n_events; n++) {
if ((track->events[n].Start + track->events[n].Duration) >= ts)
break;
ass_free_event(track, n);
track->n_events--;
}
for (int i = 0; n > 0 && i < track->n_events; i++) {
track->events[i] = track->events[i+n];
}
}
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