void CL_ZipFileHeader::load(CL_IODevice &input)
{
signature = input.read_int32();
if (signature != 0x02014b50)
{
throw CL_Exception("Incorrect File Header signature");
}
version_made_by = input.read_int16();
version_needed_to_extract = input.read_int16();
general_purpose_bit_flag = input.read_int16();
compression_method = input.read_int16();
last_mod_file_time = input.read_int16();
last_mod_file_date = input.read_int16();
crc32 = input.read_uint32();
compressed_size = input.read_int32();
uncompressed_size = input.read_int32();
file_name_length = input.read_int16();
extra_field_length = input.read_int16();
file_comment_length = input.read_int16();
disk_number_start = input.read_int16();
internal_file_attributes = input.read_int16();
external_file_attributes = input.read_int32();
relative_offset_of_local_header = input.read_int32();
filename.resize(file_name_length);
char *str1 = new char[file_name_length];
char *str2 = new char[extra_field_length];
char *str3 = new char[file_comment_length];
try
{
input.read(str1, file_name_length);
input.read(str2, extra_field_length);
input.read(str3, file_comment_length);
if (general_purpose_bit_flag & CL_ZIP_USE_UTF8)
{
filename = CL_StringHelp::utf8_to_text(CL_StringRef8(str1, file_name_length, false));
file_comment = CL_StringHelp::utf8_to_text(CL_StringRef8(str3, file_comment_length, false));
}
else
{
filename = CL_StringHelp::cp437_to_text(CL_StringRef8(str1, file_name_length, false));
file_comment = CL_StringHelp::cp437_to_text(CL_StringRef8(str3, file_comment_length, false));
}
extra_field = CL_DataBuffer(str2, extra_field_length);
delete[] str1;
delete[] str2;
delete[] str3;
}
catch (...)
{
delete[] str1;
delete[] str2;
delete[] str3;
throw;
}
}
void CL_SoundProvider_Wave_Impl::load(CL_IODevice &source)
{
source.set_little_endian_mode();
char chunk_id[4];
source.read(chunk_id, 4);
if (memcmp(chunk_id, "RIFF", 4))
throw CL_Exception("Expected RIFF header!");
cl_ubyte32 chunk_size = source.read_uint32();
char format_id[4];
source.read(format_id, 4);
if (memcmp(format_id, "WAVE", 4))
throw CL_Exception("Expected WAVE header!");
cl_ubyte32 subchunk_pos = source.get_position();
cl_ubyte32 subchunk1_size = find_subchunk("fmt ", source, subchunk_pos, chunk_size);
cl_ubyte16 audio_format = source.read_uint16();
num_channels = source.read_uint16();
frequency = source.read_uint32();
cl_ubyte32 byte_rate = source.read_uint32();
cl_ubyte16 block_align = source.read_uint16();
cl_ubyte16 bits_per_sample = source.read_uint16();
if (bits_per_sample == 16)
format = sf_16bit_signed;
else if (bits_per_sample == 8)
format = sf_8bit_unsigned;
else
throw CL_Exception("Unsupported wave sample format");
cl_ubyte32 subchunk2_size = find_subchunk("data", source, subchunk_pos, chunk_size);
data = new char[subchunk2_size];
source.read(data, subchunk2_size);
num_samples = subchunk2_size / block_align;
}
unsigned int CL_SoundProvider_Wave_Impl::find_subchunk(const char *chunk, CL_IODevice &source, unsigned int file_offset, unsigned int max_offset )
{
char subchunk1_id[4];
max_offset -= 8; // Each subchunk must contains at least name and size
while(file_offset < max_offset)
{
source.seek(file_offset);
source.read(subchunk1_id, 4);
cl_ubyte32 subchunk1_size = source.read_uint32();
if (!memcmp(subchunk1_id, chunk, 4))
{
// Found chunk
return subchunk1_size;
}
file_offset += subchunk1_size + 8;
}
throw CL_Exception("Block not found!");
}