mpv/sub/ass_mp.c

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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 <ass/ass.h>
#include <ass/ass_types.h>
#include "common/common.h"
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#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.
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void mp_ass_set_style(ASS_Style *style, double res_y,
const struct osd_style_opts *opts)
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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{
if (!style)
return;
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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if (opts->font) {
if (!style->FontName || strcmp(style->FontName, opts->font) != 0) {
free(style->FontName);
style->FontName = strdup(opts->font);
}
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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}
// libass_font_size = FontSize * (window_height / res_y)
// scale translates parameters from PlayResY=720 to res_y
double scale = res_y / 720.0;
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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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
}
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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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;
osd: make the OSD and sub font more customizable Make more aspects of the OSD font customizable. This also affects the font used for unstyled subtitles (such as SRT), or when using the --no-ass option. This adds back some customizability that was lost with commit 74e7a1 (osd: use libass for OSD rendering). Removed options: --ass-border-color --ass-color --font --subfont --subfont-text-scale Added options: --osd-color --osd-border --osd-back-color --osd-shadow-color --osd-font --osd-font-size --osd-border-size --osd-margin-x --osd-margin-y --osd-shadow-offset --osd-spacing --sub-scale The font size is now specified in pixels as it would be rendered on a window with a height of 720 pixels. OSD and subtitles are always scaled with the window height, so specifying or expecting an absolute font size doesn't make sense. Such scaled pixel units are used to specify font border etc. as well. (Note: the font size is directly passed to libass. How the fonts are actually rasterized is outside of our control, but in theory ASS font sizes map to "script" pixels and then are scaled to screen size.) The default settings should be about the same, with slight difference due to rounding to the new scales. The OSD and subtitle fonts are not separately configurable. It has limited use and would double the number of newly added options, which would be more confusing than helpful. It could be easily added later, should the need arise. Other small details that change: - ASS_Style.Encoding is not set to -1 for subs anymore (assuming subs use VSFilter direction in -no-ass mode too) - use a different WrapStyle for OSD - ASS forced styles are not applied to OSD
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}
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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)
{
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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");
}
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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();
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ass_set_message_cb(priv, message_callback, log);
if (path)
ass_set_fonts_dir(priv, path);
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ass_set_extract_fonts(priv, global->opts->use_embedded_fonts);
talloc_free(path);
return priv;
}