/* * SSA/ASS common funtions * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avcodec.h" #include "ass.h" #include "libavutil/avstring.h" /** * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS. * * @param avctx pointer to the AVCodecContext * @param font name of the default font face to use * @param font_size default font size to use * @param color default text color to use (ABGR) * @param back_color default background color to use (ABGR) * @param bold 1 for bold text, 0 for normal text * @param italic 1 for italic text, 0 for normal text * @param underline 1 for underline text, 0 for normal text * @param alignment position of the text (left, center, top...), defined after * the layout of the numpad (1-3 sub, 4-6 mid, 7-9 top) * @return >= 0 on success otherwise an error code <0 */ static int ff_ass_subtitle_header(AVCodecContext *avctx, const char *font, int font_size, int color, int back_color, int bold, int italic, int underline, int alignment) { char header[512]; snprintf(header, sizeof(header), "[Script Info]\r\n" "ScriptType: v4.00+\r\n" "\r\n" "[V4+ Styles]\r\n" "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding\r\n" "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" "\r\n" "[Events]\r\n" "Format: Layer, Start, End, Text\r\n", font, font_size, color, color, back_color, back_color, -bold, -italic, -underline, alignment); avctx->subtitle_header = av_strdup(header); if (!avctx->subtitle_header) return AVERROR(ENOMEM); avctx->subtitle_header_size = strlen(avctx->subtitle_header); return 0; } int ff_ass_subtitle_header_default(AVCodecContext *avctx) { return ff_ass_subtitle_header(avctx, ASS_DEFAULT_FONT, ASS_DEFAULT_FONT_SIZE, ASS_DEFAULT_COLOR, ASS_DEFAULT_BACK_COLOR, ASS_DEFAULT_BOLD, ASS_DEFAULT_ITALIC, ASS_DEFAULT_UNDERLINE, ASS_DEFAULT_ALIGNMENT); } void ff_ass_init(AVSubtitle *sub) { memset(sub, 0, sizeof(*sub)); } static int ts_to_string(char *str, int strlen, int ts) { int h, m, s; h = ts/360000; ts -= 360000*h; m = ts/ 6000; ts -= 6000*m; s = ts/ 100; ts -= 100*s; return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts); } int ff_ass_add_rect(AVSubtitle *sub, const char *dialog, int ts_start, int ts_end, int raw) { int len = 0, dlen, duration = ts_end - ts_start; char s_start[16], s_end[16], header[48] = {0}; AVSubtitleRect **rects; if (!raw) { ts_to_string(s_start, sizeof(s_start), ts_start); ts_to_string(s_end, sizeof(s_end), ts_end ); len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,", s_start, s_end); } dlen = strcspn(dialog, "\n"); dlen += dialog[dlen] == '\n'; rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects)); if (!rects) return AVERROR(ENOMEM); sub->rects = rects; sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration); rects[sub->num_rects] = av_mallocz(sizeof(*rects[0])); rects[sub->num_rects]->type = SUBTITLE_ASS; rects[sub->num_rects]->ass = av_malloc(len + dlen + 1); strcpy (rects[sub->num_rects]->ass , header); av_strlcpy(rects[sub->num_rects]->ass + len, dialog, dlen + 1); sub->num_rects++; return dlen; }