/* * Copyright (c) 2012 Clément Bœsch * * This file is part of FFmpeg. * * FFmpeg 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. * * FFmpeg 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 FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * RealText subtitle decoder * @see http://service.real.com/help/library/guides/ProductionGuide/prodguide/htmfiles/realtext.htm */ #include "avcodec.h" #include "ass.h" #include "libavutil/avstring.h" #include "libavutil/bprint.h" static int rt_event_to_ass(AVBPrint *buf, const char *p) { int prev_chr_is_space = 1; while (*p) { if (*p != '<') { if (!isspace(*p)) av_bprint_chars(buf, *p, 1); else if (!prev_chr_is_space) av_bprint_chars(buf, ' ', 1); prev_chr_is_space = isspace(*p); } else { const char *end = strchr(p, '>'); if (!end) break; if (!av_strncasecmp(p, "<br/>", 5) || !av_strncasecmp(p, "<br>", 4)) { av_bprintf(buf, "\\N"); } p = end; } p++; } av_bprintf(buf, "\r\n"); return 0; } static int realtext_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr, AVPacket *avpkt) { AVSubtitle *sub = data; const char *ptr = avpkt->data; AVBPrint buf; av_bprint_init(&buf, 0, 4096); // note: no need to rescale pts & duration since they are in the same // timebase as ASS (1/100) if (ptr && avpkt->size > 0 && !rt_event_to_ass(&buf, ptr)) ff_ass_add_rect(sub, buf.str, avpkt->pts, avpkt->duration, 0); *got_sub_ptr = sub->num_rects > 0; av_bprint_finalize(&buf, NULL); return avpkt->size; } AVCodec ff_realtext_decoder = { .name = "realtext", .long_name = NULL_IF_CONFIG_SMALL("RealText subtitle"), .type = AVMEDIA_TYPE_SUBTITLE, .id = AV_CODEC_ID_REALTEXT, .decode = realtext_decode_frame, .init = ff_ass_subtitle_header_default, };