summaryrefslogtreecommitdiffstats
path: root/sub/ass_mp.c
blob: b30b9964de208fccbc64c86a11a26233376ad7e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * 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 <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_bitmap **parts, struct sub_bitmaps *res)
{
    int changed;
    ASS_Image *imgs = ass_render_frame(renderer, track, time, &changed);
    if (changed)
        res->change_id++;
    res->format = SUBBITMAP_LIBASS;

    res->parts = *parts;
    res->num_parts = 0;
    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++;
    }
    *parts = res->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;
}