Esempio n. 1
0
	blargg_err_t load_( Data_Reader& in )
	{
		int file_size = in.remain();
		if ( file_size <= h.size )
			return blargg_err_file_type;
		
		RETURN_ERR( in.read( &h, h.size ) );
		if ( !h.valid_tag() )
			return blargg_err_file_type;
		
		int gd3_offset = get_le32( h.gd3_offset ) - 0x2C;
		int remain = file_size - h.size - gd3_offset;
		byte gd3_h [gd3_header_size];
		if ( gd3_offset > 0 && remain >= gd3_header_size )
		{
			RETURN_ERR( in.skip( gd3_offset ) );
			RETURN_ERR( in.read( gd3_h, sizeof gd3_h ) );
			int gd3_size = check_gd3_header( gd3_h, remain );
			if ( gd3_size )
			{
				RETURN_ERR( gd3.resize( gd3_size ) );
				RETURN_ERR( in.read( gd3.begin(), gd3.size() ) );
			}
		}
		return blargg_ok;
	}
Esempio n. 2
0
	blargg_err_t load_( Data_Reader& in )
	{
		int file_size = in.remain();
		if ( file_size <= h.size_min )
			return blargg_err_file_type;
		
		RETURN_ERR( in.read( &h, h.size_min ) );
		if ( !h.valid_tag() )
			return blargg_err_file_type;

		if ( h.size() > h.size_min )
			RETURN_ERR( in.read( &h.rf5c68_rate, h.size() - h.size_min ) );

		h.cleanup();

		int data_offset = get_le32( h.data_offset ) + offsetof( Vgm_Core::header_t, data_offset );
		int data_size = file_size - offsetof( Vgm_Core::header_t, data_offset ) - data_offset;
		int gd3_offset = get_le32( h.gd3_offset );
		if ( gd3_offset > 0 )
			gd3_offset += offsetof( Vgm_Core::header_t, gd3_offset );

		int amount_to_skip = gd3_offset - h.size();

		if ( gd3_offset > 0 && gd3_offset > data_offset )
		{
			data_size = gd3_offset - data_offset;
			amount_to_skip = 0;

			RETURN_ERR( data.resize( data_size ) );
			RETURN_ERR( in.skip( data_offset - h.size() ) );
			RETURN_ERR( in.read( data.begin(), data_size ) );
		}

		int remain = file_size - gd3_offset;
		byte gd3_h [gd3_header_size];
		if ( gd3_offset > 0 && remain >= gd3_header_size )
		{
			RETURN_ERR( in.skip( amount_to_skip ) );
			RETURN_ERR( in.read( gd3_h, sizeof gd3_h ) );
			int gd3_size = check_gd3_header( gd3_h, remain );
			if ( gd3_size )
			{
				RETURN_ERR( gd3.resize( gd3_size ) );
				RETURN_ERR( in.read( gd3.begin(), gd3.size() ) );
			}

			if ( data_offset > gd3_offset )
			{
				RETURN_ERR( data.resize( data_size ) );
				RETURN_ERR( in.skip( data_offset - gd3_offset - sizeof gd3_h - gd3.size() ) );
				RETURN_ERR( in.read( data.begin(), data.end() - data.begin() ) );
			}
		}

		return (blargg_err_t)blargg_ok;
	}