yading@11: /*
yading@11:  * Metadata muxer
yading@11:  * Copyright (c) 2010 Anton Khirnov
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include <inttypes.h>
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "ffmeta.h"
yading@11: #include "libavutil/dict.h"
yading@11: 
yading@11: 
yading@11: static void write_escape_str(AVIOContext *s, const uint8_t *str)
yading@11: {
yading@11:     const uint8_t *p = str;
yading@11: 
yading@11:     while (*p) {
yading@11:         if (*p == '#' || *p == ';' || *p == '=' || *p == '\\' || *p == '\n')
yading@11:             avio_w8(s, '\\');
yading@11:         avio_w8(s, *p);
yading@11:         p++;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static void write_tags(AVIOContext *s, AVDictionary *m)
yading@11: {
yading@11:     AVDictionaryEntry *t = NULL;
yading@11:     while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) {
yading@11:         write_escape_str(s, t->key);
yading@11:         avio_w8(s, '=');
yading@11:         write_escape_str(s, t->value);
yading@11:         avio_w8(s, '\n');
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int write_header(AVFormatContext *s)
yading@11: {
yading@11:     avio_write(s->pb, ID_STRING, sizeof(ID_STRING) - 1);
yading@11:     avio_w8(s->pb, '1');          // version
yading@11:     avio_w8(s->pb, '\n');
yading@11:     avio_flush(s->pb);
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int write_trailer(AVFormatContext *s)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     write_tags(s->pb, s->metadata);
yading@11: 
yading@11:     for (i = 0; i < s->nb_streams; i++) {
yading@11:         avio_write(s->pb, ID_STREAM, sizeof(ID_STREAM) - 1);
yading@11:         avio_w8(s->pb, '\n');
yading@11:         write_tags(s->pb, s->streams[i]->metadata);
yading@11:     }
yading@11: 
yading@11:     for (i = 0; i < s->nb_chapters; i++) {
yading@11:         AVChapter *ch = s->chapters[i];
yading@11:         avio_write(s->pb, ID_CHAPTER, sizeof(ID_CHAPTER) - 1);
yading@11:         avio_w8(s->pb, '\n');
yading@11:         avio_printf(s->pb, "TIMEBASE=%d/%d\n", ch->time_base.num, ch->time_base.den);
yading@11:         avio_printf(s->pb, "START=%"PRId64"\n", ch->start);
yading@11:         avio_printf(s->pb, "END=%"PRId64"\n",   ch->end);
yading@11:         write_tags(s->pb, ch->metadata);
yading@11:     }
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int write_packet(AVFormatContext *s, AVPacket *pkt)
yading@11: {
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVOutputFormat ff_ffmetadata_muxer = {
yading@11:     .name          = "ffmetadata",
yading@11:     .long_name     = NULL_IF_CONFIG_SMALL("FFmpeg metadata in text"),
yading@11:     .extensions    = "ffmeta",
yading@11:     .write_header  = write_header,
yading@11:     .write_packet  = write_packet,
yading@11:     .write_trailer = write_trailer,
yading@11:     .flags         = AVFMT_NOTIMESTAMPS | AVFMT_NOSTREAMS,
yading@11: };