diff options
Diffstat (limited to 'libavformat/apetagenc.c')
-rw-r--r-- | libavformat/apetagenc.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/libavformat/apetagenc.c b/libavformat/apetagenc.c new file mode 100644 index 0000000..42f5836 --- /dev/null +++ b/libavformat/apetagenc.c @@ -0,0 +1,65 @@ +/* + * APE tag writer + * Copyright (c) 2012 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/dict.h" +#include "avio_internal.h" +#include "avformat.h" +#include "apetag.h" + +static int string_is_ascii(const uint8_t *str) +{ + while (*str && *str >= 0x20 && *str <= 0x7e ) str++; + return !*str; +} + +void ff_ape_write(AVFormatContext *s) +{ + int64_t tag_bytes; + AVDictionaryEntry *t = NULL; + AVIOContext *pb = s->pb; + int tags = 0, vlen; + + tag_bytes = avio_tell(s->pb); + while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { + if (!string_is_ascii(t->key)) { + av_log(s, AV_LOG_WARNING, "Non ASCII keys are not allowed\n"); + continue; + } + + vlen = strlen(t->value); + avio_wl32(pb, vlen + 1); + avio_wl32(pb, 0); // flags + avio_put_str(pb, t->key); + avio_put_str(pb, t->value); + tags++; + } + tag_bytes = avio_tell(s->pb) - tag_bytes; + + if (!tags) + return; + + avio_write(pb, APE_TAG_PREAMBLE, 8); + avio_wl32(pb, APE_TAG_VERSION); + avio_wl32(pb, tag_bytes + APE_TAG_FOOTER_BYTES); + avio_wl32(pb, tags); // item count + avio_wl32(pb, 0); // global flags + ffio_fill(pb, 0, 8); // reserved +} |