1/* 2 * MicroDVD subtitle muxer 3 * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include <inttypes.h> 23#include "avformat.h" 24#include "internal.h" 25 26static int microdvd_write_header(struct AVFormatContext *s) 27{ 28 AVCodecContext *avctx = s->streams[0]->codec; 29 AVRational tb = avctx->time_base; 30 31 if (s->nb_streams != 1 || avctx->codec_id != AV_CODEC_ID_MICRODVD) { 32 av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n"); 33 return -1; 34 } 35 36 if (avctx->extradata && avctx->extradata_size > 0) { 37 avio_write(s->pb, "{DEFAULT}{}", 11); 38 avio_write(s->pb, avctx->extradata, avctx->extradata_size); 39 avio_flush(s->pb); 40 } 41 42 avpriv_set_pts_info(s->streams[0], 64, tb.num, tb.den); 43 return 0; 44} 45 46static int microdvd_write_packet(AVFormatContext *avf, AVPacket *pkt) 47{ 48 avio_printf(avf->pb, "{%"PRId64"}", pkt->pts); 49 if (pkt->duration < 0) 50 avio_write(avf->pb, "{}", 2); 51 else 52 avio_printf(avf->pb, "{%"PRId64"}", pkt->pts + pkt->duration); 53 avio_write(avf->pb, pkt->data, pkt->size); 54 avio_write(avf->pb, "\n", 1); 55 return 0; 56} 57 58AVOutputFormat ff_microdvd_muxer = { 59 .name = "microdvd", 60 .long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"), 61 .mime_type = "text/x-microdvd", 62 .extensions = "sub", 63 .write_header = microdvd_write_header, 64 .write_packet = microdvd_write_packet, 65 .flags = AVFMT_NOTIMESTAMPS, 66 .subtitle_codec = AV_CODEC_ID_MICRODVD, 67}; 68