Libav
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00001 /* 00002 * VorbisComment writer 00003 * Copyright (c) 2009 James Darnley 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 00032 const AVMetadataConv ff_vorbiscomment_metadata_conv[] = { 00033 { "ALBUMARTIST", "album_artist"}, 00034 { "TRACKNUMBER", "track" }, 00035 { 0 } 00036 }; 00037 00038 int ff_vorbiscomment_length(AVMetadata *m, const char *vendor_string, 00039 unsigned *count) 00040 { 00041 int len = 8; 00042 len += strlen(vendor_string); 00043 *count = 0; 00044 if (m) { 00045 AVMetadataTag *tag = NULL; 00046 while ( (tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX) ) ) { 00047 len += 4 +strlen(tag->key) + 1 + strlen(tag->value); 00048 (*count)++; 00049 } 00050 } 00051 return len; 00052 } 00053 00054 int ff_vorbiscomment_write(uint8_t **p, AVMetadata *m, 00055 const char *vendor_string, const unsigned count) 00056 { 00057 bytestream_put_le32(p, strlen(vendor_string)); 00058 bytestream_put_buffer(p, vendor_string, strlen(vendor_string)); 00059 if (m) { 00060 AVMetadataTag *tag = NULL; 00061 bytestream_put_le32(p, count); 00062 while ( (tag = av_metadata_get(m, "", tag, AV_METADATA_IGNORE_SUFFIX) ) ) { 00063 unsigned int len1 = strlen(tag->key); 00064 unsigned int len2 = strlen(tag->value); 00065 bytestream_put_le32(p, len1+1+len2); 00066 bytestream_put_buffer(p, tag->key, len1); 00067 bytestream_put_byte(p, '='); 00068 bytestream_put_buffer(p, tag->value, len2); 00069 } 00070 } else 00071 bytestream_put_le32(p, 0); 00072 return 0; 00073 }