| /* |
| * 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 |
| } |