yading@11: /*
yading@11:  * VorbisComment writer
yading@11:  * Copyright (c) 2009 James Darnley
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "avformat.h"
yading@11: #include "metadata.h"
yading@11: #include "vorbiscomment.h"
yading@11: #include "libavcodec/bytestream.h"
yading@11: #include "libavutil/dict.h"
yading@11: 
yading@11: /**
yading@11:  * VorbisComment metadata conversion mapping.
yading@11:  * from Ogg Vorbis I format specification: comment field and header specification
yading@11:  * http://xiph.org/vorbis/doc/v-comment.html
yading@11:  */
yading@11: const AVMetadataConv ff_vorbiscomment_metadata_conv[] = {
yading@11:     { "ALBUMARTIST", "album_artist"},
yading@11:     { "TRACKNUMBER", "track"  },
yading@11:     { "DISCNUMBER",  "disc"   },
yading@11:     { 0 }
yading@11: };
yading@11: 
yading@11: int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string,
yading@11:                             unsigned *count)
yading@11: {
yading@11:     int len = 8;
yading@11:     len += strlen(vendor_string);
yading@11:     *count = 0;
yading@11:     if (m) {
yading@11:         AVDictionaryEntry *tag = NULL;
yading@11:         while ((tag = av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
yading@11:             len += 4 +strlen(tag->key) + 1 + strlen(tag->value);
yading@11:             (*count)++;
yading@11:         }
yading@11:     }
yading@11:     return len;
yading@11: }
yading@11: 
yading@11: int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m,
yading@11:                            const char *vendor_string, const unsigned count)
yading@11: {
yading@11:     bytestream_put_le32(p, strlen(vendor_string));
yading@11:     bytestream_put_buffer(p, vendor_string, strlen(vendor_string));
yading@11:     if (*m) {
yading@11:         AVDictionaryEntry *tag = NULL;
yading@11:         bytestream_put_le32(p, count);
yading@11:         while ((tag = av_dict_get(*m, "", tag, AV_DICT_IGNORE_SUFFIX))) {
yading@11:             unsigned int len1 = strlen(tag->key);
yading@11:             unsigned int len2 = strlen(tag->value);
yading@11:             bytestream_put_le32(p, len1+1+len2);
yading@11:             bytestream_put_buffer(p, tag->key, len1);
yading@11:             bytestream_put_byte(p, '=');
yading@11:             bytestream_put_buffer(p, tag->value, len2);
yading@11:         }
yading@11:     } else
yading@11:         bytestream_put_le32(p, 0);
yading@11:     return 0;
yading@11: }