Libav 0.7.1
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00001 /* 00002 * VorbisComment writer 00003 * Copyright (c) 2009 James Darnley 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * Libav is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with Libav; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include "avformat.h" 00023 #include "metadata.h" 00024 #include "vorbiscomment.h" 00025 #include "libavcodec/bytestream.h" 00026 #include "libavutil/dict.h" 00027 00033 const AVMetadataConv ff_vorbiscomment_metadata_conv[] = { 00034 { "ALBUMARTIST", "album_artist"}, 00035 { "TRACKNUMBER", "track" }, 00036 { "DISCNUMBER", "disc" }, 00037 { 0 } 00038 }; 00039 00040 int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string, 00041 unsigned *count) 00042 { 00043 int len = 8; 00044 len += strlen(vendor_string); 00045 *count = 0; 00046 if (m) { 00047 AVDictionaryEntry *tag = NULL; 00048 while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) { 00049 len += 4 +strlen(tag->key) + 1 + strlen(tag->value); 00050 (*count)++; 00051 } 00052 } 00053 return len; 00054 } 00055 00056 int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m, 00057 const char *vendor_string, const unsigned count) 00058 { 00059 bytestream_put_le32(p, strlen(vendor_string)); 00060 bytestream_put_buffer(p, vendor_string, strlen(vendor_string)); 00061 if (*m) { 00062 AVDictionaryEntry *tag = NULL; 00063 bytestream_put_le32(p, count); 00064 while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) { 00065 unsigned int len1 = strlen(tag->key); 00066 unsigned int len2 = strlen(tag->value); 00067 bytestream_put_le32(p, len1+1+len2); 00068 bytestream_put_buffer(p, tag->key, len1); 00069 bytestream_put_byte(p, '='); 00070 bytestream_put_buffer(p, tag->value, len2); 00071 } 00072 } else 00073 bytestream_put_le32(p, 0); 00074 return 0; 00075 }