yading@11: /*
yading@11:  * APE tag writer
yading@11:  * Copyright (c) 2012 Paul B Mahol
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 "libavutil/dict.h"
yading@11: #include "avio_internal.h"
yading@11: #include "avformat.h"
yading@11: #include "apetag.h"
yading@11: 
yading@11: static int string_is_ascii(const uint8_t *str)
yading@11: {
yading@11:     while (*str && *str >= 0x20 && *str <= 0x7e ) str++;
yading@11:     return !*str;
yading@11: }
yading@11: 
yading@11: void ff_ape_write(AVFormatContext *s)
yading@11: {
yading@11:     int64_t tag_bytes;
yading@11:     AVDictionaryEntry *t = NULL;
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int tags = 0, vlen;
yading@11: 
yading@11:     tag_bytes = avio_tell(s->pb);
yading@11:     while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
yading@11:         if (!string_is_ascii(t->key)) {
yading@11:             av_log(s, AV_LOG_WARNING, "Non ASCII keys are not allowed\n");
yading@11:             continue;
yading@11:         }
yading@11: 
yading@11:         vlen = strlen(t->value);
yading@11:         avio_wl32(pb, vlen + 1);
yading@11:         avio_wl32(pb, 0); // flags
yading@11:         avio_put_str(pb, t->key);
yading@11:         avio_put_str(pb, t->value);
yading@11:         tags++;
yading@11:     }
yading@11:     tag_bytes = avio_tell(s->pb) - tag_bytes;
yading@11: 
yading@11:     if (!tags)
yading@11:         return;
yading@11: 
yading@11:     avio_write(pb, APE_TAG_PREAMBLE, 8);
yading@11:     avio_wl32(pb, APE_TAG_VERSION);
yading@11:     avio_wl32(pb, tag_bytes + APE_TAG_FOOTER_BYTES);
yading@11:     avio_wl32(pb, tags); // item count
yading@11:     avio_wl32(pb, 0); // global flags
yading@11:     ffio_fill(pb, 0, 8); // reserved
yading@11: }