mirror of https://github.com/mpv-player/mpv
279 lines
8.3 KiB
C
279 lines
8.3 KiB
C
/*
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* This file is part of mplayer2.
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*
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* mplayer2 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mplayer2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mplayer2. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "config.h"
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#include "talloc.h"
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#include "mp_msg.h"
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#include "sub.h"
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#include "libavutil/common.h"
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static const char osd_font_pfb[] =
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#include "sub/osd_font.h"
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;
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#include "sub/ass_mp.h"
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#include "mp_core.h"
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// NOTE: \fs-5 to reduce the size of the symbols in relation to normal text.
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// Done because libass doesn't center characters that are too high.
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#define ASS_USE_OSD_FONT "{\\fnOSD\\fs-5}"
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void osd_init_backend(struct osd_state *osd)
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{
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osd->osd_ass_library = mp_ass_init(osd->opts);
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ass_add_font(osd->osd_ass_library, "OSD", (void *)osd_font_pfb,
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sizeof(osd_font_pfb) - 1);
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osd->osd_render = ass_renderer_init(osd->osd_ass_library);
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mp_ass_configure_fonts(osd->osd_render);
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ass_set_aspect_ratio(osd->osd_render, 1.0, 1.0);
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}
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void osd_destroy_backend(struct osd_state *osd)
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{
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if (osd->osd_render)
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ass_renderer_done(osd->osd_render);
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osd->osd_render = NULL;
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ass_library_done(osd->osd_ass_library);
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osd->osd_ass_library = NULL;
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}
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static void update_font_style(ASS_Track *track, ASS_Style *style, double factor)
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{
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// Set to neutral base direction, as opposed to VSFilter LTR default
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style->Encoding = -1;
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// duplicated from ass_mp.c
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style->FontSize = track->PlayResY * factor / 100.;
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style->Outline = style->FontSize / 16;
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}
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static ASS_Track *create_osd_ass_track(struct osd_state *osd)
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{
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ASS_Track *track = mp_ass_default_track(osd->osd_ass_library, osd->opts);
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ASS_Style *style = track->styles + track->default_style;
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track->PlayResX = track->PlayResY * 1.33333;
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update_font_style(track, style, text_font_scale_factor);
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style->Alignment = 5;
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free(style->FontName);
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style->FontName = strdup(font_name ? font_name : "Sans");
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return track;
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}
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static ASS_Event *get_osd_ass_event(ASS_Track *track)
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{
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ass_flush_events(track);
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ass_alloc_event(track);
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ASS_Event *event = track->events + 0;
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event->Start = 0;
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event->Duration = 100;
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event->Style = track->default_style;
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assert(event->Text == NULL);
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return event;
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}
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static void clear_obj(struct osd_object *obj)
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{
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if (obj->osd_track)
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ass_flush_events(obj->osd_track);
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}
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static char *append_utf8_buffer(char *buffer, uint32_t codepoint)
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{
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char data[8];
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uint8_t tmp;
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char *output = data;
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PUT_UTF8(codepoint, tmp, *output++ = tmp;);
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return talloc_strndup_append_buffer(buffer, data, output - data);
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}
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void osd_get_function_sym(char *buffer, size_t buffer_size, int osd_function)
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{
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// 0xFF is never valid UTF-8, so we can use it to escape OSD symbols.
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snprintf(buffer, buffer_size, "\xFF%c", osd_function);
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}
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static char *mangle_ass(const char *in)
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{
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char *res = talloc_strdup(NULL, "");
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while (*in) {
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// As used by osd_get_function_sym().
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if (in[0] == '\xFF' && in[1]) {
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res = talloc_strdup_append_buffer(res, ASS_USE_OSD_FONT);
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res = append_utf8_buffer(res, OSD_CODEPOINTS + in[1]);
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res = talloc_strdup_append_buffer(res, "{\\r}");
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in += 2;
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continue;
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}
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if (*in == '{')
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res = talloc_strdup_append_buffer(res, "\\");
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res = talloc_strndup_append_buffer(res, in, 1);
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// Break ASS escapes with U+2060 WORD JOINER
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if (*in == '\\')
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res = append_utf8_buffer(res, 0x2060);
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in++;
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}
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return res;
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}
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static void update_osd(struct osd_state *osd, struct osd_object *obj)
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{
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if (!osd->osd_text[0]) {
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clear_obj(obj);
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return;
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}
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if (!obj->osd_track)
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obj->osd_track = create_osd_ass_track(osd);
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ASS_Event *event = get_osd_ass_event(obj->osd_track);
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char *text = mangle_ass(osd->osd_text);
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event->Text = strdup(text);
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talloc_free(text);
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}
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#define OSDBAR_ELEMS 46
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static void update_progbar(struct osd_state *osd, struct osd_object *obj)
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{
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if (osd->progbar_type < 0) {
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clear_obj(obj);
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return;
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}
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if (!obj->osd_track)
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obj->osd_track = create_osd_ass_track(osd);
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ASS_Style *style = obj->osd_track->styles + obj->osd_track->default_style;
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style->Alignment = 10;
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style->MarginL = style->MarginR = style->MarginV = 0;
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// We need a fixed font size with respect to the OSD width.
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// Assume the OSD bar takes 2/3 of the OSD width at PlayResY=288 and
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// FontSize=22 with an OSD aspect ratio of 16:9. Rescale as needed.
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// xxx can fail when unknown fonts are involved
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double asp = (double)obj->vo_res.w / obj->vo_res.h;
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double scale = (asp / 1.77777) * (obj->osd_track->PlayResY / 288.0);
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style->ScaleX = style->ScaleY = scale;
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style->FontSize = 22.0;
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style->Outline = style->FontSize / 16 * scale;
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int active = (osd->progbar_value * OSDBAR_ELEMS + 255) / 256;
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active = FFMIN(OSDBAR_ELEMS, FFMAX(active, 0));
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char *text = talloc_strdup(NULL, "{\\q2}");
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if (osd->progbar_type >= 32) {
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text = append_utf8_buffer(text, osd->progbar_type);
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} else if (osd->progbar_type > 0) {
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text = talloc_strdup_append_buffer(text, ASS_USE_OSD_FONT);
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text = append_utf8_buffer(text, OSD_CODEPOINTS + osd->progbar_type);
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text = talloc_strdup_append_buffer(text, "{\\r}");
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}
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//xxx space in normal font, because OSD font doesn't have a space
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text = talloc_strdup_append_buffer(text, "\\h");
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text = talloc_strdup_append_buffer(text, ASS_USE_OSD_FONT);
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text = append_utf8_buffer(text, OSD_CODEPOINTS + OSD_PB_START);
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for (int n = 0; n < active; n++)
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text = append_utf8_buffer(text, OSD_CODEPOINTS + OSD_PB_0);
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for (int n = 0; n < OSDBAR_ELEMS - active; n++)
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text = append_utf8_buffer(text, OSD_CODEPOINTS + OSD_PB_1);
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text = append_utf8_buffer(text, OSD_CODEPOINTS + OSD_PB_END);
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ASS_Event *event = get_osd_ass_event(obj->osd_track);
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event->Text = strdup(text);
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talloc_free(text);
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}
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static void update_sub(struct osd_state *osd, struct osd_object *obj)
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{
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struct MPOpts *opts = osd->opts;
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if (!(vo_sub && opts->sub_visibility)) {
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clear_obj(obj);
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return;
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}
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if (!obj->osd_track)
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obj->osd_track = mp_ass_default_track(osd->osd_ass_library, osd->opts);
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ASS_Style *style = obj->osd_track->styles + obj->osd_track->default_style;
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update_font_style(obj->osd_track, style, text_font_scale_factor);
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#if LIBASS_VERSION >= 0x01010000
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ass_set_line_position(osd->osd_render, 100 - sub_pos);
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#endif
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char *text = talloc_strdup(NULL, "");
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for (int n = 0; n < vo_sub->lines; n++)
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text = talloc_asprintf_append_buffer(text, "%s\n", vo_sub->text[n]);
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ASS_Event *event = get_osd_ass_event(obj->osd_track);
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char *escaped_text = mangle_ass(text);
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event->Text = strdup(escaped_text);
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talloc_free(escaped_text);
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talloc_free(text);
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}
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static void update_object(struct osd_state *osd, struct osd_object *obj)
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{
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switch (obj->type) {
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case OSDTYPE_OSD:
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update_osd(osd, obj);
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break;
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case OSDTYPE_SUBTITLE:
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update_sub(osd, obj);
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break;
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case OSDTYPE_PROGBAR:
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update_progbar(osd, obj);
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break;
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}
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}
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void osd_object_get_bitmaps(struct osd_state *osd, struct osd_object *obj,
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struct sub_bitmaps *out_imgs)
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{
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if (obj->force_redraw)
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update_object(osd, obj);
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*out_imgs = (struct sub_bitmaps) {0};
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if (!obj->osd_track)
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return;
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ass_set_frame_size(osd->osd_render, obj->vo_res.w, obj->vo_res.h);
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ass_set_aspect_ratio(osd->osd_render, obj->vo_res.display_par, 1.0);
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mp_ass_render_frame(osd->osd_render, obj->osd_track, 0,
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&obj->parts_cache, out_imgs);
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talloc_steal(obj, obj->parts_cache);
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}
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