/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     snd_SequenceSoundFileReader.cpp
  
  Copyright (C)2009-2011 Nintendo/HAL Laboratory, Inc.  All rights reserved.
  
  These coded instructions, statements, and computer programs contain proprietary
  information of Nintendo and/or its licensed developers and are protected by
  national and international copyright laws. They may not be disclosed to third
  parties or copied or duplicated in any form, in whole or in part, without the
  prior written consent of Nintendo.
  
  The content herein is highly confidential and should be handled accordingly.
  
  $Revision: 31311 $
 *---------------------------------------------------------------------------*/

#include "precompiled.h"

#include <nw/snd/snd_SequenceSoundFileReader.h>

namespace nw {
namespace snd {
namespace internal {

namespace
{

const u32 SIGNATURE_DATA_BLOCK  = NW_UT_MAKE_SIGWORD( 'D', 'A', 'T', 'A' );
const u32 SIGNATURE_LABEL_BLOCK = NW_UT_MAKE_SIGWORD( 'L', 'A', 'B', 'L' );

const u32 SUPPORTED_FILE_VERSION = 0x01000000;
const u32 CURRENT_FILE_VERSION   = 0x01000000;

bool IsValidFileHeader( const void* sequenceFile )
{
    const ut::BinaryFileHeader* header =
        reinterpret_cast<const ut::BinaryFileHeader*>( sequenceFile );

    // シグニチャ確認
    NW_ASSERTMSG( header->signature == SequenceSoundFileReader::SIGNATURE_FILE,
            "invalid file signature. sequence file is not available." );
    if ( header->signature != SequenceSoundFileReader::SIGNATURE_FILE )
    {
        return false;
    }

    // バージョン確認
    NW_ASSERTMSG( header->version >= SUPPORTED_FILE_VERSION,
            "sequence file is not supported version.\n"
            "please reconvert file using new version tools.\n"
            "(SUPPORTED_FILE_VERSION:0x%08x >= your version:0x%08x)\n",
            SUPPORTED_FILE_VERSION, header->version 
    );
    if ( header->version < SUPPORTED_FILE_VERSION ) return false;

    NW_ASSERTMSG( header->version <= CURRENT_FILE_VERSION,
            "sequence file is not supported version.\n"
            "please reconvert file using new version tools.\n"
            "(CURRENT_FILE_VERSION:0x%08x >= your version:0x%08x)\n",
            CURRENT_FILE_VERSION, header->version 
    );
    if ( header->version > CURRENT_FILE_VERSION ) return false;

    return true;
}

} // anonymous namespace


SequenceSoundFileReader::SequenceSoundFileReader( const void* sequenceFile )
: m_pHeader( NULL ),
  m_pDataBlockBody( NULL ),
  m_pLabelBlockBody( NULL )
{
    NW_NULL_ASSERT( sequenceFile );

    if ( ! IsValidFileHeader( sequenceFile ) ) return;

    m_pHeader = reinterpret_cast<const SequenceSoundFile::FileHeader*>( sequenceFile );

    const SequenceSoundFile::DataBlock* dataBlock = m_pHeader->GetDataBlock();
    NW_NULL_ASSERT( dataBlock );
    NW_ASSERT( dataBlock->header.kind == SIGNATURE_DATA_BLOCK );
    m_pDataBlockBody = &dataBlock->body;

    const SequenceSoundFile::LabelBlock* labelBlock = m_pHeader->GetLabelBlock();
    NW_NULL_ASSERT( labelBlock );
    NW_ASSERT( labelBlock->header.kind == SIGNATURE_LABEL_BLOCK );
    m_pLabelBlockBody = &labelBlock->body;
}

const void* SequenceSoundFileReader::GetSequenceData() const
{
    NW_NULL_ASSERT( m_pDataBlockBody );
    return m_pDataBlockBody->GetSequenceData();
}

bool SequenceSoundFileReader::GetOffsetByLabel( const char* label, u32* offsetPtr ) const
{
    NW_NULL_ASSERT( m_pLabelBlockBody );
    return m_pLabelBlockBody->GetOffsetByLabel( label, offsetPtr );
}

const char* SequenceSoundFileReader::GetLabelByOffset( u32 offset ) const
{
    NW_NULL_ASSERT( m_pLabelBlockBody );
    return m_pLabelBlockBody->GetLabelByOffset( offset );
}

} // namespace nw::snd::internal
} // namespace nw::snd
} // namespace nw