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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
from enum import Enum
import collections
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class CreativeVoiceFile(KaitaiStruct):
"""Creative Voice File is a container file format for digital audio
wave data. Initial revisions were able to support only unsigned
8-bit PCM and ADPCM data, later versions were revised to add support
for 16-bit PCM and a-law / u-law formats.
This format was actively used in 1990s, around the advent of
Creative's sound cards (Sound Blaster family). It was a popular
choice for a digital sound container in lots of games and multimedia
software due to simplicity and availability of Creative's recording
/ editing tools.
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice
"""
class BlockTypes(Enum):
terminator = 0
sound_data = 1
sound_data_cont = 2
silence = 3
marker = 4
text = 5
repeat_start = 6
repeat_end = 7
extra_info = 8
sound_data_new = 9
class Codecs(Enum):
pcm_8bit_unsigned = 0
adpcm_4bit = 1
adpcm_2_6bit = 2
adpcm_2_bit = 3
pcm_16bit_signed = 4
alaw = 6
ulaw = 7
adpcm_4_to_16bit = 512
SEQ_FIELDS = ["magic", "header_size", "version", "checksum", "blocks"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic']['start'] = self._io.pos()
self.magic = self._io.ensure_fixed_contents(b"\x43\x72\x65\x61\x74\x69\x76\x65\x20\x56\x6F\x69\x63\x65\x20\x46\x69\x6C\x65\x1A")
self._debug['magic']['end'] = self._io.pos()
self._debug['header_size']['start'] = self._io.pos()
self.header_size = self._io.read_u2le()
self._debug['header_size']['end'] = self._io.pos()
self._debug['version']['start'] = self._io.pos()
self.version = self._io.read_u2le()
self._debug['version']['end'] = self._io.pos()
self._debug['checksum']['start'] = self._io.pos()
self.checksum = self._io.read_u2le()
self._debug['checksum']['end'] = self._io.pos()
self._debug['blocks']['start'] = self._io.pos()
self.blocks = []
i = 0
while not self._io.is_eof():
if not 'arr' in self._debug['blocks']:
self._debug['blocks']['arr'] = []
self._debug['blocks']['arr'].append({'start': self._io.pos()})
_t_blocks = self._root.Block(self._io, self, self._root)
_t_blocks._read()
self.blocks.append(_t_blocks)
self._debug['blocks']['arr'][len(self.blocks) - 1]['end'] = self._io.pos()
i += 1
self._debug['blocks']['end'] = self._io.pos()
class BlockMarker(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x04:_Marker
"""
SEQ_FIELDS = ["marker_id"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['marker_id']['start'] = self._io.pos()
self.marker_id = self._io.read_u2le()
self._debug['marker_id']['end'] = self._io.pos()
class BlockSilence(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x03:_Silence
"""
SEQ_FIELDS = ["duration_samples", "freq_div"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['duration_samples']['start'] = self._io.pos()
self.duration_samples = self._io.read_u2le()
self._debug['duration_samples']['end'] = self._io.pos()
self._debug['freq_div']['start'] = self._io.pos()
self.freq_div = self._io.read_u1()
self._debug['freq_div']['end'] = self._io.pos()
@property
def sample_rate(self):
if hasattr(self, '_m_sample_rate'):
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
self._m_sample_rate = (1000000.0 / (256 - self.freq_div))
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
@property
def duration_sec(self):
"""Duration of silence, in seconds."""
if hasattr(self, '_m_duration_sec'):
return self._m_duration_sec if hasattr(self, '_m_duration_sec') else None
self._m_duration_sec = (self.duration_samples / self.sample_rate)
return self._m_duration_sec if hasattr(self, '_m_duration_sec') else None
class BlockSoundDataNew(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x09:_Sound_data_.28New_format.29
"""
SEQ_FIELDS = ["sample_rate", "bits_per_sample", "num_channels", "codec", "reserved", "wave"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['sample_rate']['start'] = self._io.pos()
self.sample_rate = self._io.read_u4le()
self._debug['sample_rate']['end'] = self._io.pos()
self._debug['bits_per_sample']['start'] = self._io.pos()
self.bits_per_sample = self._io.read_u1()
self._debug['bits_per_sample']['end'] = self._io.pos()
self._debug['num_channels']['start'] = self._io.pos()
self.num_channels = self._io.read_u1()
self._debug['num_channels']['end'] = self._io.pos()
self._debug['codec']['start'] = self._io.pos()
self.codec = KaitaiStream.resolve_enum(self._root.Codecs, self._io.read_u2le())
self._debug['codec']['end'] = self._io.pos()
self._debug['reserved']['start'] = self._io.pos()
self.reserved = self._io.read_bytes(4)
self._debug['reserved']['end'] = self._io.pos()
self._debug['wave']['start'] = self._io.pos()
self.wave = self._io.read_bytes_full()
self._debug['wave']['end'] = self._io.pos()
class Block(KaitaiStruct):
SEQ_FIELDS = ["block_type", "body_size1", "body_size2", "body"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['block_type']['start'] = self._io.pos()
self.block_type = KaitaiStream.resolve_enum(self._root.BlockTypes, self._io.read_u1())
self._debug['block_type']['end'] = self._io.pos()
if self.block_type != self._root.BlockTypes.terminator:
self._debug['body_size1']['start'] = self._io.pos()
self.body_size1 = self._io.read_u2le()
self._debug['body_size1']['end'] = self._io.pos()
if self.block_type != self._root.BlockTypes.terminator:
self._debug['body_size2']['start'] = self._io.pos()
self.body_size2 = self._io.read_u1()
self._debug['body_size2']['end'] = self._io.pos()
if self.block_type != self._root.BlockTypes.terminator:
self._debug['body']['start'] = self._io.pos()
_on = self.block_type
if _on == self._root.BlockTypes.sound_data_new:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockSoundDataNew(io, self, self._root)
self.body._read()
elif _on == self._root.BlockTypes.repeat_start:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockRepeatStart(io, self, self._root)
self.body._read()
elif _on == self._root.BlockTypes.marker:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockMarker(io, self, self._root)
self.body._read()
elif _on == self._root.BlockTypes.sound_data:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockSoundData(io, self, self._root)
self.body._read()
elif _on == self._root.BlockTypes.extra_info:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockExtraInfo(io, self, self._root)
self.body._read()
elif _on == self._root.BlockTypes.silence:
self._raw_body = self._io.read_bytes(self.body_size)
io = KaitaiStream(BytesIO(self._raw_body))
self.body = self._root.BlockSilence(io, self, self._root)
self.body._read()
else:
self.body = self._io.read_bytes(self.body_size)
self._debug['body']['end'] = self._io.pos()
@property
def body_size(self):
"""body_size is a 24-bit little-endian integer, so we're
emulating that by adding two standard-sized integers
(body_size1 and body_size2).
"""
if hasattr(self, '_m_body_size'):
return self._m_body_size if hasattr(self, '_m_body_size') else None
if self.block_type != self._root.BlockTypes.terminator:
self._m_body_size = (self.body_size1 + (self.body_size2 << 16))
return self._m_body_size if hasattr(self, '_m_body_size') else None
class BlockRepeatStart(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x06:_Repeat_start
"""
SEQ_FIELDS = ["repeat_count_1"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['repeat_count_1']['start'] = self._io.pos()
self.repeat_count_1 = self._io.read_u2le()
self._debug['repeat_count_1']['end'] = self._io.pos()
class BlockSoundData(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x01:_Sound_data
"""
SEQ_FIELDS = ["freq_div", "codec", "wave"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['freq_div']['start'] = self._io.pos()
self.freq_div = self._io.read_u1()
self._debug['freq_div']['end'] = self._io.pos()
self._debug['codec']['start'] = self._io.pos()
self.codec = KaitaiStream.resolve_enum(self._root.Codecs, self._io.read_u1())
self._debug['codec']['end'] = self._io.pos()
self._debug['wave']['start'] = self._io.pos()
self.wave = self._io.read_bytes_full()
self._debug['wave']['end'] = self._io.pos()
@property
def sample_rate(self):
if hasattr(self, '_m_sample_rate'):
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
self._m_sample_rate = (1000000.0 / (256 - self.freq_div))
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
class BlockExtraInfo(KaitaiStruct):
"""
.. seealso::
Source - https://wiki.multimedia.cx/index.php?title=Creative_Voice#Block_type_0x08:_Extra_info
"""
SEQ_FIELDS = ["freq_div", "codec", "num_channels_1"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['freq_div']['start'] = self._io.pos()
self.freq_div = self._io.read_u2le()
self._debug['freq_div']['end'] = self._io.pos()
self._debug['codec']['start'] = self._io.pos()
self.codec = KaitaiStream.resolve_enum(self._root.Codecs, self._io.read_u1())
self._debug['codec']['end'] = self._io.pos()
self._debug['num_channels_1']['start'] = self._io.pos()
self.num_channels_1 = self._io.read_u1()
self._debug['num_channels_1']['end'] = self._io.pos()
@property
def num_channels(self):
"""Number of channels (1 = mono, 2 = stereo)."""
if hasattr(self, '_m_num_channels'):
return self._m_num_channels if hasattr(self, '_m_num_channels') else None
self._m_num_channels = (self.num_channels_1 + 1)
return self._m_num_channels if hasattr(self, '_m_num_channels') else None
@property
def sample_rate(self):
if hasattr(self, '_m_sample_rate'):
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
self._m_sample_rate = (256000000.0 / (self.num_channels * (65536 - self.freq_div)))
return self._m_sample_rate if hasattr(self, '_m_sample_rate') else None
|
