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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 <stdbool.h>
#include <ass/ass.h>
#include <ass/ass_types.h>
#include <libavutil/common.h>
#include "config.h"
#include "mpvcore/mp_msg.h"
#include "mpvcore/path.h"
#include "ass_mp.h"
#include "sub/sub.h"
#include "stream/stream.h"
#include "mpvcore/options.h"
// res_y should be track->PlayResY
// It determines scaling of font sizes and more.
void mp_ass_set_style(ASS_Style *style, int res_y, struct osd_style_opts *opts)
{
if (opts->font) {
free(style->FontName);
style->FontName = strdup(opts->font);
style->treat_fontname_as_pattern = 1;
}
// 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;
if (opts->back_color.a) {
style->OutlineColour = MP_ASS_COLOR(opts->back_color);
style->BorderStyle = 3; // opaque box
} else {
style->OutlineColour = MP_ASS_COLOR(opts->border_color);
style->BorderStyle = 1; // outline
}
style->BackColour = MP_ASS_COLOR(opts->shadow_color);
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.;
#if LIBASS_VERSION >= 0x01020000
style->Blur = opts->blur;
#endif
}
// Add default styles, if the track does not have any styles yet.
// Apply style overrides if the user provides any.
void mp_ass_add_default_styles(ASS_Track *track, struct MPOpts *opts)
{
if (opts->ass_styles_file && opts->ass_style_override)
ass_read_styles(track, opts->ass_styles_file, opts->sub_cp);
if (track->n_styles == 0) {
if (!track->PlayResY) {
track->PlayResY = MP_ASS_FONT_PLAYRESY;
track->PlayResX = track->PlayResY * 4 / 3;
}
track->Kerning = true;
int sid = ass_alloc_style(track);
track->default_style = sid;
ASS_Style *style = track->styles + sid;
style->Name = strdup("Default");
style->Alignment = 2;
mp_ass_set_style(style, track->PlayResY, opts->sub_text_style);
}
if (opts->ass_style_override)
ass_process_force_style(track);
}
ASS_Track *mp_ass_default_track(ASS_Library *library, struct MPOpts *opts)
{
ASS_Track *track = ass_new_track(library);
track->track_type = TRACK_TYPE_ASS;
track->Timer = 100.;
mp_ass_add_default_styles(track, opts);
return track;
}
void mp_ass_configure(ASS_Renderer *priv, struct MPOpts *opts,
struct mp_osd_res *dim)
{
ass_set_frame_size(priv, dim->w, dim->h);
ass_set_margins(priv, dim->mt, dim->mb, dim->ml, dim->mr);
int set_use_margins = 0;
#if LIBASS_VERSION >= 0x01010000
int set_sub_pos = 0;
#endif
float set_line_spacing = 0;
float set_font_scale = 1;
int set_hinting = 0;
if (opts->ass_style_override) {
set_use_margins = opts->ass_use_margins;
#if LIBASS_VERSION >= 0x01010000
set_sub_pos = 100 - opts->sub_pos;
#endif
set_line_spacing = opts->ass_line_spacing;
set_font_scale = opts->sub_scale;
set_hinting = opts->ass_hinting & 3; // +4 was for no hinting if scaled
}
ass_set_use_margins(priv, set_use_margins);
#if LIBASS_VERSION >= 0x01010000
ass_set_line_position(priv, set_sub_pos);
#endif
ass_set_font_scale(priv, set_font_scale);
ass_set_hinting(priv, set_hinting);
ass_set_line_spacing(priv, set_line_spacing);
}
void mp_ass_configure_fonts(ASS_Renderer *priv, struct osd_style_opts *opts)
{
char *default_font = mp_find_user_config_file("subfont.ttf");
char *config = mp_find_config_file("fonts.conf");
if (default_font && !mp_path_exists(default_font)) {
talloc_free(default_font);
default_font = NULL;
}
mp_msg(MSGT_ASS, MSGL_V, "Setting up fonts...\n");
ass_set_fonts(priv, default_font, opts->font, 1, config, 1);
mp_msg(MSGT_ASS, MSGL_V, "Done.\n");
talloc_free(default_font);
talloc_free(config);
}
void mp_ass_render_frame(ASS_Renderer *renderer, ASS_Track *track, double time,
struct sub_bitmap **parts, struct sub_bitmaps *res)
{
int changed;
ASS_Image *imgs = ass_render_frame(renderer, track, time, &changed);
if (changed == 2)
res->bitmap_id = ++res->bitmap_pos_id;
else if (changed)
res->bitmap_pos_id++;
res->format = SUBBITMAP_LIBASS;
res->parts = *parts;
res->num_parts = 0;
int num_parts_alloc = MP_TALLOC_ELEMS(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 = FFMAX(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++;
}
*parts = res->parts;
}
static int map_ass_level[] = {
MSGL_ERR, // 0 "FATAL errors"
MSGL_WARN,
MSGL_INFO,
MSGL_V,
MSGL_V,
MSGL_V, // 5 application recommended level
MSGL_DBG2,
MSGL_DBG3, // 7 "verbose DEBUG"
};
static void message_callback(int level, const char *format, va_list va, void *ctx)
{
level = map_ass_level[level];
mp_msg_va(MSGT_ASS, level, format, va);
// libass messages lack trailing \n
mp_msg(MSGT_ASS, level, "\n");
}
ASS_Library *mp_ass_init(struct MPOpts *opts)
{
ASS_Library *priv;
char *path = mp_find_user_config_file("fonts");
priv = ass_library_init();
ass_set_message_cb(priv, message_callback, NULL);
if (path)
ass_set_fonts_dir(priv, path);
ass_set_extract_fonts(priv, opts->use_embedded_fonts);
talloc_free(path);
return priv;
}
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