This page hosts a formal specification of EDID (VESA Enhanced Extended Display Identification Data) using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.
The Python runtime library can be installed from PyPI:
python3 -m pip install kaitaistructParse a local file and get structure in memory:
data = Edid.from_file("path/to/local/file.bin")
Or parse structure from a bytes:
from kaitaistruct import KaitaiStream, BytesIO
raw = b"\x00\x01\x02..."
data = Edid(KaitaiStream(BytesIO(raw)))
After that, one can get various attributes from the structure by invoking getter methods like:
data.product_code # => Manufacturer product code
# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
from enum import Enum
import struct
if getattr(kaitaistruct, 'API_VERSION', (0, 9)) < (0, 9):
raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))
class Edid(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.magic = self._io.read_bytes(8)
if not self.magic == b"\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00":
raise kaitaistruct.ValidationNotEqualError(b"\x00\xFF\xFF\xFF\xFF\xFF\xFF\x00", self.magic, self._io, u"/seq/0")
self.mfg_bytes = self._io.read_u2be()
self.product_code = self._io.read_u2le()
self.serial = self._io.read_u4le()
self.mfg_week = self._io.read_u1()
self.mfg_year_mod = self._io.read_u1()
self.edid_version_major = self._io.read_u1()
self.edid_version_minor = self._io.read_u1()
self.input_flags = self._io.read_u1()
self.screen_size_h = self._io.read_u1()
self.screen_size_v = self._io.read_u1()
self.gamma_mod = self._io.read_u1()
self.features_flags = self._io.read_u1()
self.chromacity = Edid.ChromacityInfo(self._io, self, self._root)
self.est_timings = Edid.EstTimingsInfo(self._io, self, self._root)
self._raw_std_timings = []
self.std_timings = []
for i in range(8):
self._raw_std_timings.append(self._io.read_bytes(2))
_io__raw_std_timings = KaitaiStream(BytesIO(self._raw_std_timings[i]))
self.std_timings.append(Edid.StdTiming(_io__raw_std_timings, self, self._root))
class ChromacityInfo(KaitaiStruct):
"""Chromaticity information: colorimetry and white point
coordinates. All coordinates are stored as fixed precision
10-bit numbers, bits are shuffled for compactness.
"""
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.red_x_1_0 = self._io.read_bits_int_be(2)
self.red_y_1_0 = self._io.read_bits_int_be(2)
self.green_x_1_0 = self._io.read_bits_int_be(2)
self.green_y_1_0 = self._io.read_bits_int_be(2)
self.blue_x_1_0 = self._io.read_bits_int_be(2)
self.blue_y_1_0 = self._io.read_bits_int_be(2)
self.white_x_1_0 = self._io.read_bits_int_be(2)
self.white_y_1_0 = self._io.read_bits_int_be(2)
self._io.align_to_byte()
self.red_x_9_2 = self._io.read_u1()
self.red_y_9_2 = self._io.read_u1()
self.green_x_9_2 = self._io.read_u1()
self.green_y_9_2 = self._io.read_u1()
self.blue_x_9_2 = self._io.read_u1()
self.blue_y_9_2 = self._io.read_u1()
self.white_x_9_2 = self._io.read_u1()
self.white_y_9_2 = self._io.read_u1()
@property
def green_x_int(self):
if hasattr(self, '_m_green_x_int'):
return self._m_green_x_int
self._m_green_x_int = ((self.green_x_9_2 << 2) | self.green_x_1_0)
return getattr(self, '_m_green_x_int', None)
@property
def red_y(self):
"""Red Y coordinate."""
if hasattr(self, '_m_red_y'):
return self._m_red_y
self._m_red_y = (self.red_y_int / 1024.0)
return getattr(self, '_m_red_y', None)
@property
def green_y_int(self):
if hasattr(self, '_m_green_y_int'):
return self._m_green_y_int
self._m_green_y_int = ((self.green_y_9_2 << 2) | self.green_y_1_0)
return getattr(self, '_m_green_y_int', None)
@property
def white_y(self):
"""White Y coordinate."""
if hasattr(self, '_m_white_y'):
return self._m_white_y
self._m_white_y = (self.white_y_int / 1024.0)
return getattr(self, '_m_white_y', None)
@property
def red_x(self):
"""Red X coordinate."""
if hasattr(self, '_m_red_x'):
return self._m_red_x
self._m_red_x = (self.red_x_int / 1024.0)
return getattr(self, '_m_red_x', None)
@property
def white_x(self):
"""White X coordinate."""
if hasattr(self, '_m_white_x'):
return self._m_white_x
self._m_white_x = (self.white_x_int / 1024.0)
return getattr(self, '_m_white_x', None)
@property
def blue_x(self):
"""Blue X coordinate."""
if hasattr(self, '_m_blue_x'):
return self._m_blue_x
self._m_blue_x = (self.blue_x_int / 1024.0)
return getattr(self, '_m_blue_x', None)
@property
def white_x_int(self):
if hasattr(self, '_m_white_x_int'):
return self._m_white_x_int
self._m_white_x_int = ((self.white_x_9_2 << 2) | self.white_x_1_0)
return getattr(self, '_m_white_x_int', None)
@property
def white_y_int(self):
if hasattr(self, '_m_white_y_int'):
return self._m_white_y_int
self._m_white_y_int = ((self.white_y_9_2 << 2) | self.white_y_1_0)
return getattr(self, '_m_white_y_int', None)
@property
def green_x(self):
"""Green X coordinate."""
if hasattr(self, '_m_green_x'):
return self._m_green_x
self._m_green_x = (self.green_x_int / 1024.0)
return getattr(self, '_m_green_x', None)
@property
def red_x_int(self):
if hasattr(self, '_m_red_x_int'):
return self._m_red_x_int
self._m_red_x_int = ((self.red_x_9_2 << 2) | self.red_x_1_0)
return getattr(self, '_m_red_x_int', None)
@property
def red_y_int(self):
if hasattr(self, '_m_red_y_int'):
return self._m_red_y_int
self._m_red_y_int = ((self.red_y_9_2 << 2) | self.red_y_1_0)
return getattr(self, '_m_red_y_int', None)
@property
def blue_x_int(self):
if hasattr(self, '_m_blue_x_int'):
return self._m_blue_x_int
self._m_blue_x_int = ((self.blue_x_9_2 << 2) | self.blue_x_1_0)
return getattr(self, '_m_blue_x_int', None)
@property
def blue_y(self):
"""Blue Y coordinate."""
if hasattr(self, '_m_blue_y'):
return self._m_blue_y
self._m_blue_y = (self.blue_y_int / 1024.0)
return getattr(self, '_m_blue_y', None)
@property
def green_y(self):
"""Green Y coordinate."""
if hasattr(self, '_m_green_y'):
return self._m_green_y
self._m_green_y = (self.green_y_int / 1024.0)
return getattr(self, '_m_green_y', None)
@property
def blue_y_int(self):
if hasattr(self, '_m_blue_y_int'):
return self._m_blue_y_int
self._m_blue_y_int = ((self.blue_y_9_2 << 2) | self.blue_y_1_0)
return getattr(self, '_m_blue_y_int', None)
class EstTimingsInfo(KaitaiStruct):
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.can_720x400px_70hz = self._io.read_bits_int_be(1) != 0
self.can_720x400px_88hz = self._io.read_bits_int_be(1) != 0
self.can_640x480px_60hz = self._io.read_bits_int_be(1) != 0
self.can_640x480px_67hz = self._io.read_bits_int_be(1) != 0
self.can_640x480px_72hz = self._io.read_bits_int_be(1) != 0
self.can_640x480px_75hz = self._io.read_bits_int_be(1) != 0
self.can_800x600px_56hz = self._io.read_bits_int_be(1) != 0
self.can_800x600px_60hz = self._io.read_bits_int_be(1) != 0
self.can_800x600px_72hz = self._io.read_bits_int_be(1) != 0
self.can_800x600px_75hz = self._io.read_bits_int_be(1) != 0
self.can_832x624px_75hz = self._io.read_bits_int_be(1) != 0
self.can_1024x768px_87hz_i = self._io.read_bits_int_be(1) != 0
self.can_1024x768px_60hz = self._io.read_bits_int_be(1) != 0
self.can_1024x768px_70hz = self._io.read_bits_int_be(1) != 0
self.can_1024x768px_75hz = self._io.read_bits_int_be(1) != 0
self.can_1280x1024px_75hz = self._io.read_bits_int_be(1) != 0
self.can_1152x870px_75hz = self._io.read_bits_int_be(1) != 0
self.reserved = self._io.read_bits_int_be(7)
class StdTiming(KaitaiStruct):
class AspectRatios(Enum):
ratio_16_10 = 0
ratio_4_3 = 1
ratio_5_4 = 2
ratio_16_9 = 3
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._read()
def _read(self):
self.horiz_active_pixels_mod = self._io.read_u1()
self.aspect_ratio = KaitaiStream.resolve_enum(Edid.StdTiming.AspectRatios, self._io.read_bits_int_be(2))
self.refresh_rate_mod = self._io.read_bits_int_be(6)
@property
def bytes_lookahead(self):
if hasattr(self, '_m_bytes_lookahead'):
return self._m_bytes_lookahead
_pos = self._io.pos()
self._io.seek(0)
self._m_bytes_lookahead = self._io.read_bytes(2)
self._io.seek(_pos)
return getattr(self, '_m_bytes_lookahead', None)
@property
def is_used(self):
if hasattr(self, '_m_is_used'):
return self._m_is_used
self._m_is_used = self.bytes_lookahead != b"\x01\x01"
return getattr(self, '_m_is_used', None)
@property
def horiz_active_pixels(self):
"""Range of horizontal active pixels."""
if hasattr(self, '_m_horiz_active_pixels'):
return self._m_horiz_active_pixels
if self.is_used:
self._m_horiz_active_pixels = ((self.horiz_active_pixels_mod + 31) * 8)
return getattr(self, '_m_horiz_active_pixels', None)
@property
def refresh_rate(self):
"""Vertical refresh rate, Hz."""
if hasattr(self, '_m_refresh_rate'):
return self._m_refresh_rate
if self.is_used:
self._m_refresh_rate = (self.refresh_rate_mod + 60)
return getattr(self, '_m_refresh_rate', None)
@property
def mfg_year(self):
if hasattr(self, '_m_mfg_year'):
return self._m_mfg_year
self._m_mfg_year = (self.mfg_year_mod + 1990)
return getattr(self, '_m_mfg_year', None)
@property
def mfg_id_ch1(self):
if hasattr(self, '_m_mfg_id_ch1'):
return self._m_mfg_id_ch1
self._m_mfg_id_ch1 = ((self.mfg_bytes & 31744) >> 10)
return getattr(self, '_m_mfg_id_ch1', None)
@property
def mfg_id_ch3(self):
if hasattr(self, '_m_mfg_id_ch3'):
return self._m_mfg_id_ch3
self._m_mfg_id_ch3 = (self.mfg_bytes & 31)
return getattr(self, '_m_mfg_id_ch3', None)
@property
def gamma(self):
if hasattr(self, '_m_gamma'):
return self._m_gamma
if self.gamma_mod != 255:
self._m_gamma = ((self.gamma_mod + 100) / 100.0)
return getattr(self, '_m_gamma', None)
@property
def mfg_str(self):
if hasattr(self, '_m_mfg_str'):
return self._m_mfg_str
self._m_mfg_str = (struct.pack('3b', (self.mfg_id_ch1 + 64), (self.mfg_id_ch2 + 64), (self.mfg_id_ch3 + 64))).decode(u"ASCII")
return getattr(self, '_m_mfg_str', None)
@property
def mfg_id_ch2(self):
if hasattr(self, '_m_mfg_id_ch2'):
return self._m_mfg_id_ch2
self._m_mfg_id_ch2 = ((self.mfg_bytes & 992) >> 5)
return getattr(self, '_m_mfg_id_ch2', None)