| 1 | /* |
| 2 | * VorbisComment writer |
| 3 | * Copyright (c) 2009 James Darnley |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #include "avformat.h" |
| 23 | #include "metadata.h" |
| 24 | #include "vorbiscomment.h" |
| 25 | #include "libavcodec/bytestream.h" |
| 26 | #include "libavutil/dict.h" |
| 27 | |
| 28 | /** |
| 29 | * VorbisComment metadata conversion mapping. |
| 30 | * from Ogg Vorbis I format specification: comment field and header specification |
| 31 | * http://xiph.org/vorbis/doc/v-comment.html |
| 32 | */ |
| 33 | const AVMetadataConv ff_vorbiscomment_metadata_conv[] = { |
| 34 | { "ALBUMARTIST", "album_artist"}, |
| 35 | { "TRACKNUMBER", "track" }, |
| 36 | { "DISCNUMBER", "disc" }, |
| 37 | { "DESCRIPTION", "comment" }, |
| 38 | { 0 } |
| 39 | }; |
| 40 | |
| 41 | int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string) |
| 42 | { |
| 43 | int len = 8; |
| 44 | len += strlen(vendor_string); |
| 45 | if (m) { |
| 46 | AVDictionaryEntry *tag = NULL; |
| 47 | while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) { |
| 48 | len += 4 +strlen(tag->key) + 1 + strlen(tag->value); |
| 49 | } |
| 50 | } |
| 51 | return len; |
| 52 | } |
| 53 | |
| 54 | int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m, |
| 55 | const char *vendor_string) |
| 56 | { |
| 57 | bytestream_put_le32(p, strlen(vendor_string)); |
| 58 | bytestream_put_buffer(p, vendor_string, strlen(vendor_string)); |
| 59 | if (*m) { |
| 60 | int count = av_dict_count(*m); |
| 61 | AVDictionaryEntry *tag = NULL; |
| 62 | bytestream_put_le32(p, count); |
| 63 | while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) { |
| 64 | unsigned int len1 = strlen(tag->key); |
| 65 | unsigned int len2 = strlen(tag->value); |
| 66 | bytestream_put_le32(p, len1+1+len2); |
| 67 | bytestream_put_buffer(p, tag->key, len1); |
| 68 | bytestream_put_byte(p, '='); |
| 69 | bytestream_put_buffer(p, tag->value, len2); |
| 70 | } |
| 71 | } else |
| 72 | bytestream_put_le32(p, 0); |
| 73 | return 0; |
| 74 | } |