1/* 2 * VorbisComment writer 3 * Copyright (c) 2009 James Darnley 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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 * Libav 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 Libav; 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 */ 33const AVMetadataConv ff_vorbiscomment_metadata_conv[] = { 34 { "ALBUMARTIST", "album_artist"}, 35 { "TRACKNUMBER", "track" }, 36 { "DISCNUMBER", "disc" }, 37 { 0 } 38}; 39 40int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string, 41 unsigned *count) 42{ 43 int len = 8; 44 len += strlen(vendor_string); 45 *count = 0; 46 if (m) { 47 AVDictionaryEntry *tag = NULL; 48 while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) { 49 len += 4 +strlen(tag->key) + 1 + strlen(tag->value); 50 (*count)++; 51 } 52 } 53 return len; 54} 55 56int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m, 57 const char *vendor_string, const unsigned count) 58{ 59 bytestream_put_le32(p, strlen(vendor_string)); 60 bytestream_put_buffer(p, vendor_string, strlen(vendor_string)); 61 if (*m) { 62 AVDictionaryEntry *tag = NULL; 63 bytestream_put_le32(p, count); 64 while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) { 65 unsigned int len1 = strlen(tag->key); 66 unsigned int len2 = strlen(tag->value); 67 bytestream_put_le32(p, len1+1+len2); 68 bytestream_put_buffer(p, tag->key, len1); 69 bytestream_put_byte(p, '='); 70 bytestream_put_buffer(p, tag->value, len2); 71 } 72 } else 73 bytestream_put_le32(p, 0); 74 return 0; 75} 76