forked from KolibriOS/kolibrios
133 lines
4.5 KiB
C
133 lines
4.5 KiB
C
/*
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* SSA/ASS common functions
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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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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/bprint.h"
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#include "libavutil/common.h"
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int ff_ass_subtitle_header(AVCodecContext *avctx,
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const char *font, int font_size,
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int color, int back_color,
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int bold, int italic, int underline,
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int alignment)
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{
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avctx->subtitle_header = av_asprintf(
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"[Script Info]\r\n"
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"ScriptType: v4.00+\r\n"
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"\r\n"
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"[V4+ Styles]\r\n"
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"Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n"
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"Style: Default,%s,%d,&H%x,&H%x,&H%x,&H%x,%d,%d,%d,1,1,0,%d,10,10,10,0,0\r\n"
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"\r\n"
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"[Events]\r\n"
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"Format: Layer, Start, End, Style, Text\r\n",
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font, font_size, color, color, back_color, back_color,
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-bold, -italic, -underline, alignment);
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if (!avctx->subtitle_header)
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return AVERROR(ENOMEM);
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avctx->subtitle_header_size = strlen(avctx->subtitle_header);
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return 0;
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}
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int ff_ass_subtitle_header_default(AVCodecContext *avctx)
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{
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return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT,
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ASS_DEFAULT_FONT_SIZE,
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ASS_DEFAULT_COLOR,
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ASS_DEFAULT_BACK_COLOR,
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ASS_DEFAULT_BOLD,
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ASS_DEFAULT_ITALIC,
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ASS_DEFAULT_UNDERLINE,
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ASS_DEFAULT_ALIGNMENT);
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}
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static void insert_ts(AVBPrint *buf, int ts)
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{
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if (ts == -1) {
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av_bprintf(buf, "9:59:59.99,");
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} else {
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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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av_bprintf(buf, "%d:%02d:%02d.%02d,", h, m, s, ts);
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}
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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 duration, int raw)
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{
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AVBPrint buf;
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int ret, dlen;
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AVSubtitleRect **rects;
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
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if (!raw || raw == 2) {
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long int layer = 0;
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if (raw == 2) {
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/* skip ReadOrder */
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dialog = strchr(dialog, ',');
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if (!dialog)
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return AVERROR_INVALIDDATA;
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dialog++;
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/* extract Layer or Marked */
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layer = strtol(dialog, (char**)&dialog, 10);
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if (*dialog != ',')
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return AVERROR_INVALIDDATA;
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dialog++;
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}
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av_bprintf(&buf, "Dialogue: %ld,", layer);
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insert_ts(&buf, ts_start);
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insert_ts(&buf, duration == -1 ? -1 : ts_start + duration);
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if (raw != 2)
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av_bprintf(&buf, "Default,");
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}
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dlen = strcspn(dialog, "\n");
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dlen += dialog[dlen] == '\n';
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av_bprintf(&buf, "%.*s", dlen, dialog);
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if (raw == 2)
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av_bprintf(&buf, "\r\n");
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if (!av_bprint_is_complete(&buf))
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return AVERROR(ENOMEM);
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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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ret = av_bprint_finalize(&buf, &rects[sub->num_rects]->ass);
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if (ret < 0)
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return ret;
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sub->num_rects++;
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return dlen;
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}
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