mirror of
https://github.com/FFmpeg/FFmpeg.git
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70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/*
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* SSA/ASS common funtions
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "ass.h"
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void ff_ass_init(AVSubtitle *sub)
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{
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memset(sub, 0, sizeof(*sub));
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}
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static int ts_to_string(char *str, int strlen, int ts)
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{
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int h, m, s;
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h = ts/360000; ts -= 360000*h;
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m = ts/ 6000; ts -= 6000*m;
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s = ts/ 100; ts -= 100*s;
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return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts);
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}
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int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
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int ts_start, int ts_end, int raw)
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{
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int len = 0, dlen, duration = ts_end - ts_start;
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char s_start[16], s_end[16], header[48] = {0};
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AVSubtitleRect **rects;
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if (!raw) {
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ts_to_string(s_start, sizeof(s_start), ts_start);
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ts_to_string(s_end, sizeof(s_end), ts_end );
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len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,",
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s_start, s_end);
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}
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dlen = strcspn(dialog, "\n");
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dlen += dialog[dlen] == '\n';
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rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
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if (!rects)
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return AVERROR(ENOMEM);
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sub->rects = rects;
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sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
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rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
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rects[sub->num_rects]->type = SUBTITLE_ASS;
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rects[sub->num_rects]->ass = av_malloc(len + dlen + 1);
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strcpy (rects[sub->num_rects]->ass , header);
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strncpy(rects[sub->num_rects]->ass + len, dialog, dlen);
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rects[sub->num_rects]->ass[len+dlen] = 0;
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sub->num_rects++;
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return dlen;
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}
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