mirror of https://github.com/mpv-player/mpv
314 lines
9.2 KiB
C
314 lines
9.2 KiB
C
/*
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* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 libass; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <inttypes.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <ass/ass.h>
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#include <ass/ass_types.h>
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#include <libavutil/common.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "path.h"
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#include "ass_mp.h"
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#include "subreader.h"
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#include "stream/stream.h"
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#include "options.h"
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#ifdef CONFIG_FONTCONFIG
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extern int font_fontconfig;
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#else
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static int font_fontconfig = -1;
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#endif
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extern char *font_name;
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extern char *sub_font_name;
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extern float text_font_scale_factor;
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extern int subtitle_autoscale;
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#ifdef CONFIG_ICONV
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extern char *sub_cp;
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#else
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static char *sub_cp = 0;
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#endif
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ASS_Track *mp_ass_default_track(ASS_Library *library, struct MPOpts *opts)
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{
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ASS_Track *track = ass_new_track(library);
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track->track_type = TRACK_TYPE_ASS;
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track->Timer = 100.;
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track->PlayResY = 288;
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track->WrapStyle = 0;
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if (opts->ass_styles_file)
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ass_read_styles(track, opts->ass_styles_file, sub_cp);
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if (track->n_styles == 0) {
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track->Kerning = true;
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int sid = ass_alloc_style(track);
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track->default_style = sid;
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ASS_Style *style = track->styles + sid;
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style->Name = strdup("Default");
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style->FontName = (font_fontconfig >= 0
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&& sub_font_name) ? strdup(sub_font_name)
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: (font_fontconfig >= 0
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&& font_name) ? strdup(font_name) : strdup("Sans");
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style->treat_fontname_as_pattern = 1;
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double fs = track->PlayResY * text_font_scale_factor / 100.;
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/* The font size is always proportional to video height only;
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* real -subfont-autoscale behavior is not implemented.
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* Apply a correction that corresponds to about 4:3 aspect ratio
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* video to get a size somewhat closer to what non-libass rendering
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* would produce with the same text_font_scale_factor
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* and subtitle_autoscale.
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*/
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if (subtitle_autoscale == 2)
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fs *= 1.3;
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else if (subtitle_autoscale == 3)
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fs *= 1.7;
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uint32_t c1 = 0xFFFFFF00;
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uint32_t c2 = 0x00000000;
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if (opts->ass_color)
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c1 = strtoll(opts->ass_color, NULL, 16);
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if (opts->ass_border_color)
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c2 = strtoll(opts->ass_border_color, NULL, 16);
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style->FontSize = fs;
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style->PrimaryColour = c1;
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style->SecondaryColour = c1;
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style->OutlineColour = c2;
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style->BackColour = 0x00000000;
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style->BorderStyle = 1;
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style->Alignment = 2;
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style->Outline = fs / 16;
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style->MarginL = 10;
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style->MarginR = 10;
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style->MarginV = 5;
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style->ScaleX = 1.;
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style->ScaleY = 1.;
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}
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ass_process_force_style(track);
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return track;
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}
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static int check_duplicate_plaintext_event(ASS_Track *track)
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{
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int i;
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ASS_Event *evt = track->events + track->n_events - 1;
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for (i = 0; i < track->n_events - 1; ++i) // ignoring last event, it is the one we are comparing with
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if (track->events[i].Start == evt->Start &&
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track->events[i].Duration == evt->Duration &&
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strcmp(track->events[i].Text, evt->Text) == 0)
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return 1;
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return 0;
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}
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/**
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* \brief Convert subtitle to ASS_Events for the given track
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* \param track track
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* \param sub subtitle to convert
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* \return event id
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* note: assumes that subtitle is _not_ fps-based; caller must manually correct
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* Start and Duration in other case.
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**/
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static int ass_process_subtitle(ASS_Track *track, subtitle *sub)
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{
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int eid;
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ASS_Event *event;
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int len = 0, j;
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char *p;
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char *end;
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eid = ass_alloc_event(track);
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event = track->events + eid;
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event->Start = sub->start * 10;
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event->Duration = (sub->end - sub->start) * 10;
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event->Style = track->default_style;
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for (j = 0; j < sub->lines; ++j)
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len += sub->text[j] ? strlen(sub->text[j]) : 0;
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len += 2 * sub->lines; // '\N', including the one after the last line
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len += 6; // {\anX}
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len += 1; // '\0'
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event->Text = malloc(len);
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end = event->Text + len;
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p = event->Text;
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if (sub->alignment)
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p += snprintf(p, end - p, "{\\an%d}", sub->alignment);
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for (j = 0; j < sub->lines; ++j)
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p += snprintf(p, end - p, "%s\\N", sub->text[j]);
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if (sub->lines > 0)
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p -= 2; // remove last "\N"
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*p = 0;
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if (check_duplicate_plaintext_event(track)) {
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ass_free_event(track, eid);
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track->n_events--;
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return -1;
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}
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mp_msg(MSGT_ASS, MSGL_V,
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"plaintext event at %" PRId64 ", +%" PRId64 ": %s \n",
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(int64_t) event->Start, (int64_t) event->Duration, event->Text);
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return eid;
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}
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/**
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* \brief Convert subdata to ASS_Track
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* \param subdata subtitles struct from subreader
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* \param fps video framerate
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* \return newly allocated ASS_Track, filled with subtitles from subdata
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*/
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ASS_Track *mp_ass_read_subdata(ASS_Library *library, struct MPOpts *opts,
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sub_data *subdata, double fps)
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{
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ASS_Track *track;
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int i;
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track = mp_ass_default_track(library, opts);
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track->name = subdata->filename ? strdup(subdata->filename) : 0;
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for (i = 0; i < subdata->sub_num; ++i) {
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int eid = ass_process_subtitle(track, subdata->subtitles + i);
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if (eid < 0)
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continue;
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if (!subdata->sub_uses_time) {
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track->events[eid].Start *= 100. / fps;
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track->events[eid].Duration *= 100. / fps;
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}
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}
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return track;
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}
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ASS_Track *mp_ass_read_stream(ASS_Library *library, const char *fname,
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char *charset)
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{
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ASS_Track *track;
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struct stream *s = open_stream(fname, NULL, NULL);
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if (!s)
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// Stream code should have printed an error already
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return NULL;
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struct bstr content = stream_read_complete(s, NULL, 100000000, 1);
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if (content.start == NULL)
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mp_tmsg(MSGT_ASS, MSGL_ERR, "Refusing to load subtitle file "
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"larger than 100 MB: %s\n", fname);
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free_stream(s);
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if (content.len == 0) {
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talloc_free(content.start);
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return NULL;
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}
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content.start[content.len] = 0;
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track = ass_read_memory(library, content.start, content.len, charset);
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if (track) {
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free(track->name);
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track->name = strdup(fname);
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}
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talloc_free(content.start);
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return track;
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}
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void mp_ass_configure(ASS_Renderer *priv, struct MPOpts *opts, int w, int h,
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bool unscaled)
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{
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int hinting;
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ass_set_frame_size(priv, w, h);
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ass_set_margins(priv, opts->ass_top_margin, opts->ass_bottom_margin, 0, 0);
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mp_ass_reload_options(priv, opts);
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if (!unscaled && (opts->ass_hinting & 4))
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hinting = 0;
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else
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hinting = opts->ass_hinting & 3;
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ass_set_hinting(priv, hinting);
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ass_set_line_spacing(priv, opts->ass_line_spacing);
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}
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void mp_ass_configure_fonts(ASS_Renderer *priv)
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{
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char *dir, *path, *family;
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dir = get_path("fonts");
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if (font_fontconfig < 0 && sub_font_name)
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path = strdup(sub_font_name);
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else if (font_fontconfig < 0 && font_name)
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path = strdup(font_name);
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else
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path = get_path("subfont.ttf");
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if (font_fontconfig >= 0 && sub_font_name)
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family = strdup(sub_font_name);
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else if (font_fontconfig >= 0 && font_name)
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family = strdup(font_name);
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else
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family = 0;
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ass_set_fonts(priv, path, family, font_fontconfig + 1, NULL, 1);
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free(dir);
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free(path);
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free(family);
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}
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static void message_callback(int level, const char *format, va_list va, void *ctx)
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{
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mp_msg(MSGT_ASS, level, "[ass] ");
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mp_msg_va(MSGT_ASS, level, format, va);
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// libass messages lack trailing \n
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mp_msg(MSGT_ASS, level, "\n");
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}
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ASS_Library *mp_ass_init(struct MPOpts *opts)
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{
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ASS_Library *priv;
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char *path = get_path("fonts");
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priv = ass_library_init();
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ass_set_message_cb(priv, message_callback, NULL);
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ass_set_fonts_dir(priv, path);
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ass_set_extract_fonts(priv, opts->use_embedded_fonts);
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free(path);
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return priv;
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}
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void mp_ass_reload_options(ASS_Renderer *priv, struct MPOpts *opts)
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{
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/* This could be needed for vf_ass case if the margins were actually
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* runtime configurable, but would be wrong with EOSD:
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* ass_set_margins(priv, opts->ass_top_margin, opts->ass_bottom_margin,
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* 0, 0);
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*/
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ass_set_use_margins(priv, opts->ass_use_margins);
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ass_set_font_scale(priv, opts->ass_font_scale);
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}
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