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/*
* tag_module.c
* Copyright 2009-2011 Paula Stanciu and John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include <libaudcore/index.h>
#include <libaudcore/runtime.h>
#include <libaudcore/tuple.h>
#include <libaudcore/vfs.h>
#include "audtag.h"
#include "util.h"
#include "tag_module.h"
#include "builtin.h"
namespace audtag {
static APETagModule ape;
static ID3v1TagModule id3v1;
static ID3v22TagModule id3v22;
static ID3v24TagModule id3v24;
static TagModule * const modules[] = {& id3v24, & id3v22, & ape, & id3v1};
TagModule * find_tag_module (VFSFile & fd, TagType new_type)
{
for (TagModule * module : modules)
{
if (fd.fseek (0, VFS_SEEK_SET))
{
AUDDBG("not a seekable file\n");
return nullptr;
}
if (module->can_handle_file (fd))
{
AUDDBG ("Module %s accepted file.\n", module->m_name);
return module;
}
}
/* No existing tag; see if we can create a new one. */
if (new_type != TagType::None)
{
for (TagModule * module : modules)
{
if (module->m_type == new_type)
return module;
}
}
AUDDBG("no module found\n");
return nullptr;
}
/**************************************************************************************************************
* tag module object management *
**************************************************************************************************************/
bool TagModule::can_handle_file (VFSFile & file)
{
AUDDBG("Module %s does not support %s (no probing function implemented).\n", m_name,
file.filename ());
return false;
}
bool TagModule::read_tag (VFSFile & file, Tuple & tuple, Index<char> * image)
{
AUDDBG ("%s: read_tag() not implemented.\n", m_name);
return false;
}
bool TagModule::write_tag (VFSFile & file, Tuple const & tuple)
{
AUDDBG ("%s: write_tag() not implemented.\n", m_name);
return false;
}
}
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