mirror of
https://github.com/DreamSourceLab/DSView.git
synced 2025-01-13 13:32:53 +08:00
669 lines
28 KiB
Python
Executable File
669 lines
28 KiB
Python
Executable File
##
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## This file is part of the libsigrokdecode project.
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##
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## Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, see <http://www.gnu.org/licenses/>.
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##
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# TODO:
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# - EDID < 1.3
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# - add short annotations
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# - Signal level standard field in basic display parameters block
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# - Additional color point descriptors
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# - Additional standard timing descriptors
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# - Extensions
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import sigrokdecode as srd
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import os
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EDID_HEADER = [0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00]
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OFF_VENDOR = 8
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OFF_VERSION = 18
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OFF_BASIC = 20
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OFF_CHROM = 25
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OFF_EST_TIMING = 35
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OFF_STD_TIMING = 38
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OFF_DET_TIMING = 54
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OFF_NUM_EXT = 126
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OFF_CHECKSUM = 127
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# Pre-EDID established timing modes
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est_modes = [
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'720x400@70Hz',
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'720x400@88Hz',
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'640x480@60Hz',
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'640x480@67Hz',
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'640x480@72Hz',
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'640x480@75Hz',
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'800x600@56Hz',
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'800x600@60Hz',
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'800x600@72Hz',
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'800x600@75Hz',
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'832x624@75Hz',
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'1024x768@87Hz(i)',
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'1024x768@60Hz',
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'1024x768@70Hz',
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'1024x768@75Hz',
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'1280x1024@75Hz',
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'1152x870@75Hz',
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]
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# X:Y display aspect ratios, as used in standard timing modes
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xy_ratio = [
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(16, 10),
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(4, 3),
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(5, 4),
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(16, 9),
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]
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# Annotation classes
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ANN_FIELDS = 0
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ANN_SECTIONS = 1
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class Decoder(srd.Decoder):
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api_version = 3
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id = 'edid'
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name = 'EDID'
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longname = 'Extended Display Identification Data'
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desc = 'Data structure describing display device capabilities.'
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license = 'gplv3+'
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inputs = ['i2c']
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outputs = []
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tags = ['Display', 'Memory', 'PC']
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annotations = (
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('fields', 'EDID structure fields'),
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('sections', 'EDID structure sections'),
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)
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annotation_rows = (
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('sections', 'Sections', (1,)),
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('fields', 'Fields', (0,)),
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)
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def __init__(self):
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self.reset()
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def reset(self):
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self.state = None
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# Received data items, used as an index into samplenum/data
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self.cnt = 0
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# Start/end sample numbers per data item
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self.sn = []
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# Received data
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self.cache = []
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# Random read offset
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self.offset = 0
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# Extensions
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self.extension = 0
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self.ext_sn = [[]]
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self.ext_cache = [[]]
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def start(self):
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self.out_ann = self.register(srd.OUTPUT_ANN)
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def decode(self, ss, es, data):
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cmd, data = data
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if cmd == 'ADDRESS WRITE' and data == 0x50:
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self.state = 'offset'
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self.ss = ss
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return
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if cmd == 'ADDRESS READ' and data == 0x50:
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if self.extension > 0:
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self.state = 'extensions'
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s = str(self.extension)
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t = ["Extension: " + s, "X: " + s, s]
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else:
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self.state = 'header'
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t = ["EDID"]
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self.put(ss, es, self.out_ann, [ANN_SECTIONS, t])
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return
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if cmd == 'DATA WRITE' and self.state == 'offset':
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self.offset = data
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self.extension = self.offset // 128
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self.cnt = self.offset % 128
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if self.extension > 0:
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ext = self.extension - 1
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l = len(self.ext_sn[ext])
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# Truncate or extend to self.cnt.
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self.sn = self.ext_sn[ext][0:self.cnt] + [0] * max(0, self.cnt - l)
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self.cache = self.ext_cache[ext][0:self.cnt] + [0] * max(0, self.cnt - l)
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else:
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l = len(self.sn)
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self.sn = self.sn[0:self.cnt] + [0] * max(0, self.cnt - l)
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self.cache = self.cache[0:self.cnt] + [0] * max(0, self.cnt - l)
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ss = self.ss if self.ss else ss
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s = str(data)
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t = ["Offset: " + s, "O: " + s, s]
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self.put(ss, es, self.out_ann, [ANN_SECTIONS, t])
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return
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# We only care about actual data bytes that are read (for now).
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if cmd != 'DATA READ':
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return
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self.cnt += 1
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if self.extension > 0:
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self.ext_sn[self.extension - 1].append([ss, es])
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self.ext_cache[self.extension - 1].append(data)
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else:
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self.sn.append([ss, es])
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self.cache.append(data)
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if self.state is None or self.state == 'header':
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# Wait for the EDID header
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if self.cnt >= OFF_VENDOR:
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if self.cache[-8:] == EDID_HEADER:
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# Throw away any garbage before the header
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self.sn = self.sn[-8:]
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self.cache = self.cache[-8:]
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self.cnt = 8
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self.state = 'edid'
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self.put(self.sn[0][0], es, self.out_ann,
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[ANN_SECTIONS, ['Header']])
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self.put(self.sn[0][0], es, self.out_ann,
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[ANN_FIELDS, ['Header pattern']])
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elif self.state == 'edid':
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if self.cnt == OFF_VERSION:
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self.decode_vid(-10)
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self.decode_pid(-8)
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self.decode_serial(-6)
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self.decode_mfrdate(-2)
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self.put(self.sn[OFF_VENDOR][0], es, self.out_ann,
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[ANN_SECTIONS, ['Vendor/product']])
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elif self.cnt == OFF_BASIC:
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self.put(self.sn[OFF_VERSION][0], es, self.out_ann,
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[ANN_SECTIONS, ['EDID Version']])
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self.put(self.sn[OFF_VERSION][0], self.sn[OFF_VERSION][1],
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self.out_ann, [ANN_FIELDS,
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['Version %d' % self.cache[-2]]])
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self.put(self.sn[OFF_VERSION+1][0], self.sn[OFF_VERSION+1][1],
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self.out_ann, [ANN_FIELDS,
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['Revision %d' % self.cache[-1]]])
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elif self.cnt == OFF_CHROM:
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self.put(self.sn[OFF_BASIC][0], es, self.out_ann,
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[ANN_SECTIONS, ['Basic display']])
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self.decode_basicdisplay(-5)
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elif self.cnt == OFF_EST_TIMING:
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self.put(self.sn[OFF_CHROM][0], es, self.out_ann,
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[ANN_SECTIONS, ['Color characteristics']])
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self.decode_chromaticity(-10)
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elif self.cnt == OFF_STD_TIMING:
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self.put(self.sn[OFF_EST_TIMING][0], es, self.out_ann,
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[ANN_SECTIONS, ['Established timings']])
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self.decode_est_timing(-3)
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elif self.cnt == OFF_DET_TIMING:
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self.put(self.sn[OFF_STD_TIMING][0], es, self.out_ann,
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[ANN_SECTIONS, ['Standard timings']])
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self.decode_std_timing(self.cnt - 16)
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elif self.cnt == OFF_NUM_EXT:
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self.decode_descriptors(-72)
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elif self.cnt == OFF_CHECKSUM:
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self.put(ss, es, self.out_ann,
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[0, ['Extensions present: %d' % self.cache[self.cnt-1]]])
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elif self.cnt == OFF_CHECKSUM+1:
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checksum = 0
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for i in range(128):
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checksum += self.cache[i]
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if checksum % 256 == 0:
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csstr = 'OK'
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else:
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csstr = 'WRONG!'
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self.put(ss, es, self.out_ann, [0, ['Checksum: %d (%s)' % (
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self.cache[self.cnt-1], csstr)]])
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self.state = 'extensions'
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elif self.state == 'extensions':
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cache = self.ext_cache[self.extension - 1]
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sn = self.ext_sn[self.extension - 1]
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v = cache[self.cnt - 1]
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if self.cnt == 1:
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if v == 2:
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self.put(ss, es, self.out_ann, [1, ['Extensions Tag', 'Tag']])
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else:
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self.put(ss, es, self.out_ann, [1, ['Bad Tag']])
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elif self.cnt == 2:
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self.put(ss, es, self.out_ann, [1, ['Version']])
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self.put(ss, es, self.out_ann, [0, [str(v)]])
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elif self.cnt == 3:
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self.put(ss, es, self.out_ann, [1, ['DTD offset']])
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self.put(ss, es, self.out_ann, [0, [str(v)]])
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elif self.cnt == 4:
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self.put(ss, es, self.out_ann, [1, ['Format support | DTD count']])
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support = "Underscan: {0}, {1} Audio, YCbCr: {2}".format(
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"yes" if v & 0x80 else "no",
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"Basic" if v & 0x40 else "No",
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["None", "422", "444", "422+444"][(v & 0x30) >> 4])
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self.put(ss, es, self.out_ann, [0, ['{0}, DTDs: {1}'.format(support, v & 0xf)]])
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elif self.cnt <= cache[2]:
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if self.cnt == cache[2]:
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self.put(sn[4][0], es, self.out_ann, [1, ['Data block collection']])
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self.decode_data_block_collection(cache[4:], sn[4:])
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elif (self.cnt - cache[2]) % 18 == 0:
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n = (self.cnt - cache[2]) / 18
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if n <= cache[3] & 0xf:
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self.put(sn[self.cnt - 18][0], es, self.out_ann, [1, ['DTD']])
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self.decode_descriptors(-18)
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elif self.cnt == 127:
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dtd_last = cache[2] + (cache[3] & 0xf) * 18
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self.put(sn[dtd_last][0], es, self.out_ann, [1, ['Padding']])
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elif self.cnt == 128:
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checksum = sum(cache) % 256
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self.put(ss, es, self.out_ann, [0, ['Checksum: %d (%s)' % (
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cache[self.cnt-1], 'Wrong' if checksum else 'OK')]])
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def ann_field(self, start, end, annotation):
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annotation = annotation if isinstance(annotation, list) else [annotation]
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sn = self.ext_sn[self.extension - 1] if self.extension else self.sn
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self.put(sn[start][0], sn[end][1],
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self.out_ann, [ANN_FIELDS, annotation])
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def lookup_pnpid(self, pnpid):
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pnpid_file = os.path.join(os.path.dirname(__file__), 'pnpids.txt')
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if os.path.exists(pnpid_file):
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for line in open(pnpid_file).readlines():
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if line.find(pnpid + ';') == 0:
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return line[4:].strip()
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return ''
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def decode_vid(self, offset):
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pnpid = chr(64 + ((self.cache[offset] & 0x7c) >> 2))
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pnpid += chr(64 + (((self.cache[offset] & 0x03) << 3)
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| ((self.cache[offset+1] & 0xe0) >> 5)))
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pnpid += chr(64 + (self.cache[offset+1] & 0x1f))
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vendor = self.lookup_pnpid(pnpid)
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if vendor:
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pnpid += ' (%s)' % vendor
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self.ann_field(offset, offset+1, pnpid)
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def decode_pid(self, offset):
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pidstr = 'Product 0x%.2x%.2x' % (self.cache[offset+1], self.cache[offset])
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self.ann_field(offset, offset+1, pidstr)
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def decode_serial(self, offset):
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serialnum = (self.cache[offset+3] << 24) \
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+ (self.cache[offset+2] << 16) \
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+ (self.cache[offset+1] << 8) \
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+ self.cache[offset]
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serialstr = ''
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is_alnum = True
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for i in range(4):
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if not chr(self.cache[offset+3-i]).isalnum():
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is_alnum = False
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break
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serialstr += chr(self.cache[offset+3-i])
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serial = serialstr if is_alnum else str(serialnum)
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self.ann_field(offset, offset+3, 'Serial ' + serial)
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def decode_mfrdate(self, offset):
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datestr = ''
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if self.cache[offset]:
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datestr += 'week %d, ' % self.cache[offset]
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datestr += str(1990 + self.cache[offset+1])
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if datestr:
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self.ann_field(offset, offset+1, ['Manufactured ' + datestr, datestr])
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def decode_basicdisplay(self, offset):
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# Video input definition
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vid = self.cache[offset]
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if vid & 0x80:
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# Digital
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self.ann_field(offset, offset, 'Video input: VESA DFP 1.')
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else:
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# Analog
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sls = (vid & 60) >> 5
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self.ann_field(offset, offset, 'Signal level standard: %.2x' % sls)
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if vid & 0x10:
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self.ann_field(offset, offset, 'Blank-to-black setup expected')
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syncs = ''
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if vid & 0x08:
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syncs += 'separate syncs, '
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if vid & 0x04:
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syncs += 'composite syncs, '
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if vid & 0x02:
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syncs += 'sync on green, '
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if vid & 0x01:
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syncs += 'Vsync serration required, '
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if syncs:
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self.ann_field(offset, offset, 'Supported syncs: %s' % syncs[:-2])
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# Max horizontal/vertical image size
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if self.cache[offset+1] != 0 and self.cache[offset+2] != 0:
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# Projectors have this set to 0
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sizestr = '%dx%dcm' % (self.cache[offset+1], self.cache[offset+2])
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self.ann_field(offset+1, offset+2, 'Physical size: ' + sizestr)
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# Display transfer characteristic (gamma)
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if self.cache[offset+3] != 0xff:
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gamma = (self.cache[offset+3] + 100) / 100
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self.ann_field(offset+3, offset+3, 'Gamma: %1.2f' % gamma)
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# Feature support
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fs = self.cache[offset+4]
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dpms = ''
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if fs & 0x80:
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dpms += 'standby, '
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if fs & 0x40:
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dpms += 'suspend, '
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if fs & 0x20:
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dpms += 'active off, '
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if dpms:
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self.ann_field(offset+4, offset+4, 'DPMS support: %s' % dpms[:-2])
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dt = (fs & 0x18) >> 3
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dtstr = ''
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if dt == 0:
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dtstr = 'Monochrome'
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elif dt == 1:
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dtstr = 'RGB color'
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elif dt == 2:
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dtstr = 'non-RGB multicolor'
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if dtstr:
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self.ann_field(offset+4, offset+4, 'Display type: %s' % dtstr)
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if fs & 0x04:
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self.ann_field(offset+4, offset+4, 'Color space: standard sRGB')
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# Save this for when we decode the first detailed timing descriptor
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self.have_preferred_timing = (fs & 0x02) == 0x02
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if fs & 0x01:
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gft = ''
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else:
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gft = 'not '
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self.ann_field(offset+4, offset+4,
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'Generalized timing formula: %ssupported' % gft)
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def convert_color(self, value):
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# Convert from 10-bit packet format to float
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outval = 0.0
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for i in range(10):
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if value & 0x01:
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outval += 2 ** -(10-i)
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value >>= 1
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return outval
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def decode_chromaticity(self, offset):
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redx = (self.cache[offset+2] << 2) + ((self.cache[offset] & 0xc0) >> 6)
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redy = (self.cache[offset+3] << 2) + ((self.cache[offset] & 0x30) >> 4)
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self.ann_field(offset, offset+9, 'Chromacity red: X %1.3f, Y %1.3f' % (
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self.convert_color(redx), self.convert_color(redy)))
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greenx = (self.cache[offset+4] << 2) + ((self.cache[offset] & 0x0c) >> 6)
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greeny = (self.cache[offset+5] << 2) + ((self.cache[offset] & 0x03) >> 4)
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self.ann_field(offset, offset+9, 'Chromacity green: X %1.3f, Y %1.3f' % (
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self.convert_color(greenx), self.convert_color(greeny)))
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bluex = (self.cache[offset+6] << 2) + ((self.cache[offset+1] & 0xc0) >> 6)
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bluey = (self.cache[offset+7] << 2) + ((self.cache[offset+1] & 0x30) >> 4)
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self.ann_field(offset, offset+9, 'Chromacity blue: X %1.3f, Y %1.3f' % (
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self.convert_color(bluex), self.convert_color(bluey)))
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whitex = (self.cache[offset+8] << 2) + ((self.cache[offset+1] & 0x0c) >> 6)
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whitey = (self.cache[offset+9] << 2) + ((self.cache[offset+1] & 0x03) >> 4)
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self.ann_field(offset, offset+9, 'Chromacity white: X %1.3f, Y %1.3f' % (
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self.convert_color(whitex), self.convert_color(whitey)))
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def decode_est_timing(self, offset):
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# Pre-EDID modes
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bitmap = (self.cache[offset] << 9) \
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+ (self.cache[offset+1] << 1) \
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+ ((self.cache[offset+2] & 0x80) >> 7)
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modestr = ''
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for i in range(17):
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if bitmap & (1 << (16-i)):
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modestr += est_modes[i] + ', '
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if modestr:
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self.ann_field(offset, offset+2,
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'Supported established modes: %s' % modestr[:-2])
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def decode_std_timing(self, offset):
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modestr = ''
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for i in range(0, 16, 2):
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if self.cache[offset+i] == 0x01 and self.cache[offset+i+1] == 0x01:
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# Unused field
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continue
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x = (self.cache[offset+i] + 31) * 8
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ratio = (self.cache[offset+i+1] & 0xc0) >> 6
|
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ratio_x, ratio_y = xy_ratio[ratio]
|
|
y = x / ratio_x * ratio_y
|
|
refresh = (self.cache[offset+i+1] & 0x3f) + 60
|
|
modestr += '%dx%d@%dHz, ' % (x, y, refresh)
|
|
if modestr:
|
|
self.ann_field(offset, offset + 15,
|
|
'Supported standard modes: %s' % modestr[:-2])
|
|
|
|
def decode_detailed_timing(self, cache, sn, offset, is_first):
|
|
if is_first and self.have_preferred_timing:
|
|
# Only on first detailed timing descriptor
|
|
section = 'Preferred'
|
|
else:
|
|
section = 'Detailed'
|
|
section += ' timing descriptor'
|
|
|
|
self.put(sn[0][0], sn[17][1],
|
|
self.out_ann, [ANN_SECTIONS, [section]])
|
|
|
|
pixclock = float((cache[1] << 8) + cache[0]) / 100
|
|
self.ann_field(offset, offset+1, 'Pixel clock: %.2f MHz' % pixclock)
|
|
|
|
horiz_active = ((cache[4] & 0xf0) << 4) + cache[2]
|
|
horiz_blank = ((cache[4] & 0x0f) << 8) + cache[3]
|
|
self.ann_field(offset+2, offset+4, 'Horizontal active: %d, blanking: %d' % (horiz_active, horiz_blank))
|
|
|
|
vert_active = ((cache[7] & 0xf0) << 4) + cache[5]
|
|
vert_blank = ((cache[7] & 0x0f) << 8) + cache[6]
|
|
self.ann_field(offset+5, offset+7, 'Vertical active: %d, blanking: %d' % (vert_active, vert_blank))
|
|
|
|
horiz_sync_off = ((cache[11] & 0xc0) << 2) + cache[8]
|
|
horiz_sync_pw = ((cache[11] & 0x30) << 4) + cache[9]
|
|
vert_sync_off = ((cache[11] & 0x0c) << 2) + ((cache[10] & 0xf0) >> 4)
|
|
vert_sync_pw = ((cache[11] & 0x03) << 4) + (cache[10] & 0x0f)
|
|
|
|
syncs = (horiz_sync_off, horiz_sync_pw, vert_sync_off, vert_sync_pw)
|
|
self.ann_field(offset+8, offset+11, [
|
|
'Horizontal sync offset: %d, pulse width: %d, Vertical sync offset: %d, pulse width: %d' % syncs,
|
|
'HSync off: %d, pw: %d, VSync off: %d, pw: %d' % syncs])
|
|
|
|
horiz_size = ((cache[14] & 0xf0) << 4) + cache[12]
|
|
vert_size = ((cache[14] & 0x0f) << 8) + cache[13]
|
|
self.ann_field(offset+12, offset+14, 'Physical size: %dx%dmm' % (horiz_size, vert_size))
|
|
|
|
horiz_border = cache[15]
|
|
self.ann_field(offset+15, offset+15, 'Horizontal border: %d pixels' % horiz_border)
|
|
vert_border = cache[16]
|
|
self.ann_field(offset+16, offset+16, 'Vertical border: %d lines' % vert_border)
|
|
|
|
features = 'Flags: '
|
|
if cache[17] & 0x80:
|
|
features += 'interlaced, '
|
|
stereo = (cache[17] & 0x60) >> 5
|
|
if stereo:
|
|
if cache[17] & 0x01:
|
|
features += '2-way interleaved stereo ('
|
|
features += ['right image on even lines',
|
|
'left image on even lines',
|
|
'side-by-side'][stereo-1]
|
|
features += '), '
|
|
else:
|
|
features += 'field sequential stereo ('
|
|
features += ['right image on sync=1', 'left image on sync=1',
|
|
'4-way interleaved'][stereo-1]
|
|
features += '), '
|
|
sync = (cache[17] & 0x18) >> 3
|
|
sync2 = (cache[17] & 0x06) >> 1
|
|
posneg = ['negative', 'positive']
|
|
features += 'sync type '
|
|
if sync == 0x00:
|
|
features += 'analog composite (serrate on RGB)'
|
|
elif sync == 0x01:
|
|
features += 'bipolar analog composite (serrate on RGB)'
|
|
elif sync == 0x02:
|
|
features += 'digital composite (serrate on composite polarity ' \
|
|
+ (posneg[sync2 & 0x01]) + ')'
|
|
elif sync == 0x03:
|
|
features += 'digital separate ('
|
|
features += 'Vsync polarity ' + (posneg[(sync2 & 0x02) >> 1])
|
|
features += ', Hsync polarity ' + (posneg[sync2 & 0x01])
|
|
features += ')'
|
|
features += ', '
|
|
self.ann_field(offset+17, offset+17, features[:-2])
|
|
|
|
def decode_descriptor(self, cache, offset):
|
|
tag = cache[3]
|
|
self.ann_field(offset, offset+1, "Flag")
|
|
self.ann_field(offset+2, offset+2, "Flag (reserved)")
|
|
self.ann_field(offset+3, offset+3, "Tag: {0:X}".format(tag))
|
|
self.ann_field(offset+4, offset+4, "Flag")
|
|
|
|
sn = self.ext_sn[self.extension - 1] if self.extension else self.sn
|
|
|
|
if tag == 0xff:
|
|
# Monitor serial number
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Serial number']])
|
|
text = bytes(cache[5:][:13]).decode(encoding='cp437', errors='replace')
|
|
self.ann_field(offset+5, offset+17, text.strip())
|
|
elif tag == 0xfe:
|
|
# Text
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Text']])
|
|
text = bytes(cache[5:][:13]).decode(encoding='cp437', errors='replace')
|
|
self.ann_field(offset+5, offset+17, text.strip())
|
|
elif tag == 0xfc:
|
|
# Monitor name
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Monitor name']])
|
|
text = bytes(cache[5:][:13]).decode(encoding='cp437', errors='replace')
|
|
self.ann_field(offset+5, offset+17, text.strip())
|
|
elif tag == 0xfd:
|
|
# Monitor range limits
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Monitor range limits']])
|
|
self.ann_field(offset+5, offset+5, [
|
|
'Minimum vertical rate: {0}Hz'.format(cache[5]),
|
|
'VSync >= {0}Hz'.format(cache[5])])
|
|
self.ann_field(offset+6, offset+6, [
|
|
'Maximum vertical rate: {0}Hz'.format(cache[6]),
|
|
'VSync <= {0}Hz'.format(cache[6])])
|
|
self.ann_field(offset+7, offset+7, [
|
|
'Minimum horizontal rate: {0}kHz'.format(cache[7]),
|
|
'HSync >= {0}kHz'.format(cache[7])])
|
|
self.ann_field(offset+8, offset+8, [
|
|
'Maximum horizontal rate: {0}kHz'.format(cache[8]),
|
|
'HSync <= {0}kHz'.format(cache[8])])
|
|
self.ann_field(offset+9, offset+9, [
|
|
'Maximum pixel clock: {0}MHz'.format(cache[9] * 10),
|
|
'PixClk <= {0}MHz'.format(cache[9] * 10)])
|
|
if cache[10] == 0x02:
|
|
self.ann_field(offset+10, offset+10, ['Secondary timing formula supported', '2nd GTF: yes'])
|
|
self.ann_field(offset+11, offset+17, ['GTF'])
|
|
else:
|
|
self.ann_field(offset+10, offset+10, ['Secondary timing formula unsupported', '2nd GTF: no'])
|
|
self.ann_field(offset+11, offset+17, ['Padding'])
|
|
elif tag == 0xfb:
|
|
# Additional color point data
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Additional color point data']])
|
|
elif tag == 0xfa:
|
|
# Additional standard timing definitions
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Additional standard timing definitions']])
|
|
else:
|
|
self.put(sn[offset][0], sn[offset+17][1], self.out_ann,
|
|
[ANN_SECTIONS, ['Unknown descriptor']])
|
|
|
|
def decode_descriptors(self, offset):
|
|
# 4 consecutive 18-byte descriptor blocks
|
|
cache = self.ext_cache[self.extension - 1] if self.extension else self.cache
|
|
sn = self.ext_sn[self.extension - 1] if self.extension else self.sn
|
|
|
|
for i in range(offset, 0, 18):
|
|
if cache[i] != 0 or cache[i+1] != 0:
|
|
self.decode_detailed_timing(cache[i:], sn[i:], i, i == offset)
|
|
else:
|
|
if cache[i+2] == 0 or cache[i+4] == 0:
|
|
self.decode_descriptor(cache[i:], i)
|
|
|
|
def decode_data_block(self, tag, cache, sn):
|
|
codes = { 0: ['0: Reserved'],
|
|
1: ['1: Audio Data Block', 'Audio'],
|
|
2: ['2: Video Data Block', 'Video'],
|
|
3: ['3: Vendor Specific Data Block', 'VSDB'],
|
|
4: ['4: Speacker Allocation Data Block', 'SADB'],
|
|
5: ['5: VESA DTC Data Block', 'DTC'],
|
|
6: ['6: Reserved'],
|
|
7: ['7: Extended', 'Ext'] }
|
|
ext_codes = { 0: [ '0: Video Capability Data Block', 'VCDB'],
|
|
1: [ '1: Vendor Specific Video Data Block', 'VSVDB'],
|
|
17: ['17: Vendor Specific Audio Data Block', 'VSADB'], }
|
|
if tag < 7:
|
|
code = codes[tag]
|
|
ext_len = 0
|
|
if tag == 1:
|
|
aformats = { 1: '1 (LPCM)' }
|
|
rates = [ '192', '176', '96', '88', '48', '44', '32' ]
|
|
|
|
aformat = cache[1] >> 3
|
|
sup_rates = [ i for i in range(0, 8) if (1 << i) & cache[2] ]
|
|
|
|
data = "Format: {0} Channels: {1}".format(
|
|
aformats.get(aformat, aformat), (cache[1] & 0x7) + 1)
|
|
data += " Rates: " + " ".join(rates[6 - i] for i in sup_rates)
|
|
data += " Extra: [{0:02X}]".format(cache[3])
|
|
|
|
elif tag ==2:
|
|
data = "VIC: "
|
|
data += ", ".join("{0}{1}".format(v & 0x7f,
|
|
['', ' (Native)'][v >> 7])
|
|
for v in cache[1:])
|
|
|
|
elif tag ==3:
|
|
ouis = { b'\x00\x0c\x03': 'HDMI Licensing, LLC' }
|
|
oui = bytes(cache[3:0:-1])
|
|
ouis = ouis.get(oui, None)
|
|
data = "OUI: " + " ".join('{0:02X}'.format(x) for x in oui)
|
|
data += " ({0})".format(ouis) if ouis else ""
|
|
data += ", PhyAddr: {0}.{1}.{2}.{3}".format(
|
|
cache[4] >> 4, cache[4] & 0xf, cache[5] >> 4, cache[5] & 0xf)
|
|
data += ", [" + " ".join('{0:02X}'.format(x) for x in cache[6:]) + "]"
|
|
|
|
elif tag ==4:
|
|
speakers = [ 'FL/FR', 'LFE', 'FC', 'RL/RR',
|
|
'RC', 'FLC/FRC', 'RLC/RRC', 'FLW/FRW',
|
|
'FLH/FRH', 'TC', 'FCH' ]
|
|
sup_speakers = cache[1] + (cache[2] << 8)
|
|
sup_speakers = [ i for i in range(0, 8) if (1 << i) & sup_speakers ]
|
|
data = "Speakers: " + " ".join(speakers[i] for i in sup_speakers)
|
|
|
|
else:
|
|
data = " ".join('{0:02X}'.format(x) for x in cache[1:])
|
|
|
|
else:
|
|
# Extended tags
|
|
ext_len = 1
|
|
ext_code = ext_codes.get(cache[1], ['Unknown', '?'])
|
|
code = zip(codes[7], [", ", ": "], ext_code)
|
|
code = [ "".join(x) for x in code ]
|
|
data = " ".join('{0:02X}'.format(x) for x in cache[2:])
|
|
|
|
self.put(sn[0][0], sn[0 + ext_len][1], self.out_ann,
|
|
[ANN_FIELDS, code])
|
|
self.put(sn[1 + ext_len][0], sn[len(cache) - 1][1], self.out_ann,
|
|
[ANN_FIELDS, [data]])
|
|
|
|
def decode_data_block_collection(self, cache, sn):
|
|
offset = 0
|
|
while offset < len(cache):
|
|
length = 1 + cache[offset] & 0x1f
|
|
tag = cache[offset] >> 5
|
|
self.decode_data_block(tag, cache[offset:offset + length], sn[offset:])
|
|
offset += length
|