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/*
* mp3tools.c
*
* This file is part of libhimd, a library for accessing Sony HiMD devices.
*
* Copyright (C) 2009-2011 Michael Karcher
* Copyright (C) 2011 Mårten Cassel
* Copyright (C) 2011 Thomas Arp
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <id3tag.h>
#include "himd.h"
#include "himd_private.h"
static inline char *dup_id3_first_string(union id3_field const *field)
{
return (char *)id3_ucs4_utf8duplicate(id3_field_getstrings(field, 0));
}
/*
* gets artist, title and album info from an ID3 tag.
* The output strings are to be free()d.
* Returns -1, if id3 informations could be extracted.
*/
int himd_get_songinfo(const char *filepath, char ** artist, char ** title, char **album, struct himderrinfo * status)
{
struct id3_file * file;
struct id3_frame const *frame;
struct id3_tag *tag;
union id3_field const *field;
file = id3_file_open(filepath, ID3_FILE_MODE_READONLY);
tag = id3_file_tag(file);
if(!tag)
{
id3_file_close(file);
set_status_printf(status, HIMD_ERROR_NO_ID3_TAGS_FOUND, "no id3 tags found in file '%s'", filepath);
return -1;
}
frame = id3_tag_findframe (tag, ID3_FRAME_ARTIST, 0);
if(frame && (field = &frame->fields[1]) &&
id3_field_getnstrings(field) > 0)
*artist = dup_id3_first_string(field);
else
*artist = NULL;
frame = id3_tag_findframe (tag, ID3_FRAME_TITLE, 0);
if(frame && (field = &frame->fields[1]) &&
id3_field_getnstrings(field) > 0)
*title = dup_id3_first_string(field);
else
*title = NULL;
frame = id3_tag_findframe (tag, ID3_FRAME_ALBUM, 0);
if(frame && (field = &frame->fields[1]) &&
id3_field_getnstrings(field) > 0)
*album = dup_id3_first_string(field);
else
*album = NULL;
id3_file_close(file);
return 0;
}
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