mirror of
https://github.com/FFmpeg/FFmpeg.git
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66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* APE tag writer
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* Copyright (c) 2012 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/dict.h"
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#include "avio_internal.h"
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#include "avformat.h"
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#include "apetag.h"
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static int string_is_ascii(const uint8_t *str)
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{
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while (*str && *str >= 0x20 && *str <= 0x7e ) str++;
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return !*str;
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}
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void ff_ape_write(AVFormatContext *s)
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{
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int64_t tag_bytes;
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AVDictionaryEntry *t = NULL;
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AVIOContext *pb = s->pb;
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int tags = 0, vlen;
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tag_bytes = avio_tell(s->pb);
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while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
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if (!string_is_ascii(t->key)) {
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av_log(s, AV_LOG_WARNING, "Non ASCII keys are not allowed\n");
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continue;
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}
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vlen = strlen(t->value);
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avio_wl32(pb, vlen + 1);
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avio_wl32(pb, 0); // flags
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avio_put_str(pb, t->key);
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avio_put_str(pb, t->value);
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tags++;
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}
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tag_bytes = avio_tell(s->pb) - tag_bytes;
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if (!tags)
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return;
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avio_write(pb, APE_TAG_PREAMBLE, 8);
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avio_wl32(pb, APE_TAG_VERSION);
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avio_wl32(pb, tag_bytes + APE_TAG_FOOTER_BYTES);
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avio_wl32(pb, tags); // item count
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avio_wl32(pb, 0); // global flags
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ffio_fill(pb, 0, 8); // reserved
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}
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