/* * Metadata muxer * Copyright (c) 2010 Anton Khirnov * * 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 <inttypes.h> #include "avformat.h" #include "ffmeta.h" #include "libavutil/dict.h" static void write_escape_str(AVIOContext *s, const uint8_t *str) { const uint8_t *p = str; while (*p) { if (*p == '#' || *p == ';' || *p == '=' || *p == '\\' || *p == '\n') avio_w8(s, '\\'); avio_w8(s, *p); p++; } } static void write_tags(AVIOContext *s, AVDictionary *m) { AVDictionaryEntry *t = NULL; while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) { write_escape_str(s, t->key); avio_w8(s, '='); write_escape_str(s, t->value); avio_w8(s, '\n'); } } static int write_header(AVFormatContext *s) { avio_write(s->pb, ID_STRING, sizeof(ID_STRING) - 1); avio_w8(s->pb, '1'); // version avio_w8(s->pb, '\n'); avio_flush(s->pb); return 0; } static int write_trailer(AVFormatContext *s) { int i; write_tags(s->pb, s->metadata); for (i = 0; i < s->nb_streams; i++) { avio_write(s->pb, ID_STREAM, sizeof(ID_STREAM) - 1); avio_w8(s->pb, '\n'); write_tags(s->pb, s->streams[i]->metadata); } for (i = 0; i < s->nb_chapters; i++) { AVChapter *ch = s->chapters[i]; avio_write(s->pb, ID_CHAPTER, sizeof(ID_CHAPTER) - 1); avio_w8(s->pb, '\n'); avio_printf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den); avio_printf(s->pb, "START=%"PRId64"\n", ch->start); avio_printf(s->pb, "END=%"PRId64"\n", ch->end); write_tags(s->pb, ch->metadata); } avio_flush(s->pb); return 0; } static int write_packet(AVFormatContext *s, AVPacket *pkt) { return 0; } AVOutputFormat ff_ffmetadata_muxer = { .name = "ffmetadata", .long_name = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text format"), .extensions = "ffmeta", .write_header = write_header, .write_packet = write_packet, .write_trailer = write_trailer, .flags = AVFMT_NOTIMESTAMPS | AVFMT_NOSTREAMS, };