## ## This file is part of the libsigrokdecode project. ## ## Copyright (C) 2012 Bert Vermeulen ## ## This program is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or ## (at your option) any later version. ## ## This program is distributed in the hope that it will be useful, ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this program; if not, see . ## # TODO: # - EDID < 1.3 # - add short annotations # - Signal level standard field in basic display parameters block # - Additional color point descriptors # - Additional standard timing descriptors # - Extensions import sigrokdecode as srd import os EDID_HEADER = [0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00] OFF_VENDOR = 8 OFF_VERSION = 18 OFF_BASIC = 20 OFF_CHROM = 25 OFF_EST_TIMING = 35 OFF_STD_TIMING = 38 OFF_DET_TIMING = 54 OFF_NUM_EXT = 126 OFF_CHECKSUM = 127 # Pre-EDID established timing modes est_modes = [ '720x400@70Hz', '720x400@88Hz', '640x480@60Hz', '640x480@67Hz', '640x480@72Hz', '640x480@75Hz', '800x600@56Hz', '800x600@60Hz', '800x600@72Hz', '800x600@75Hz', '832x624@75Hz', '1024x768@87Hz(i)', '1024x768@60Hz', '1024x768@70Hz', '1024x768@75Hz', '1280x1024@75Hz', '1152x870@75Hz', ] # X:Y display aspect ratios, as used in standard timing modes xy_ratio = [ (16, 10), (4, 3), (5, 4), (16, 9), ] # Annotation classes ANN_FIELDS = 0 ANN_SECTIONS = 1 class Decoder(srd.Decoder): api_version = 3 id = 'edid' name = 'EDID' longname = 'Extended Display Identification Data' desc = 'Data structure describing display device capabilities.' license = 'gplv3+' inputs = ['i2c'] outputs = ['edid'] annotations = ( ('fields', 'EDID structure fields'), ('sections', 'EDID structure sections'), ) annotation_rows = ( ('sections', 'Sections', (1,)), ('fields', 'Fields', (0,)), ) def __init__(self): self.reset() def reset(self): self.state = None # Received data items, used as an index into samplenum/data self.cnt = 0 # Start/end sample numbers per data item self.sn = [] # Received data self.cache = [] # Random read offset self.offset = 0 # Extensions self.extension = 0 self.ext_sn = [[]] self.ext_cache = [[]] def start(self): self.out_ann = self.register(srd.OUTPUT_ANN) def decode(self, ss, es, data): cmd, data = data if cmd == 'ADDRESS WRITE' and data == 0x50: self.state = 'offset' self.ss = ss return if cmd == 'ADDRESS READ' and data == 0x50: if self.extension > 0: self.state = 'extensions' s = str(self.extension) t = ["Extension: " + s, "X: " + s, s] else: self.state = 'header' t = ["EDID"] self.put(ss, es, self.out_ann, [ANN_SECTIONS, t]) return if cmd == 'DATA WRITE' and self.state == 'offset': self.offset = data self.extension = self.offset // 128 self.cnt = self.offset % 128 if self.extension > 0: ext = self.extension - 1 l = len(self.ext_sn[ext]) # Truncate or extend to self.cnt. self.sn = self.ext_sn[ext][0:self.cnt] + [0] * max(0, self.cnt - l) self.cache = self.ext_cache[ext][0:self.cnt] + [0] * max(0, self.cnt - l) else: l = len(self.sn) self.sn = self.sn[0:self.cnt] + [0] * max(0, self.cnt - l) self.cache = self.cache[0:self.cnt] + [0] * max(0, self.cnt - l) ss = self.ss if self.ss else ss s = str(data) t = ["Offset: " + s, "O: " + s, s] self.put(ss, es, self.out_ann, [ANN_SECTIONS, t]) return # We only care about actual data bytes that are read (for now). if cmd != 'DATA READ': return self.cnt += 1 if self.extension > 0: self.ext_sn[self.extension - 1].append([ss, es]) self.ext_cache[self.extension - 1].append(data) else: self.sn.append([ss, es]) self.cache.append(data) if self.state is None or self.state == 'header': # Wait for the EDID header if self.cnt >= OFF_VENDOR: if self.cache[-8:] == EDID_HEADER: # Throw away any garbage before the header self.sn = self.sn[-8:] self.cache = self.cache[-8:] self.cnt = 8 self.state = 'edid' self.put(self.sn[0][0], es, self.out_ann, [ANN_SECTIONS, ['Header']]) self.put(self.sn[0][0], es, self.out_ann, [ANN_FIELDS, ['Header pattern']]) elif self.state == 'edid': if self.cnt == OFF_VERSION: self.decode_vid(-10) self.decode_pid(-8) self.decode_serial(-6) self.decode_mfrdate(-2) self.put(self.sn[OFF_VENDOR][0], es, self.out_ann, [ANN_SECTIONS, ['Vendor/product']]) elif self.cnt == OFF_BASIC: self.put(self.sn[OFF_VERSION][0], es, self.out_ann, [ANN_SECTIONS, ['EDID Version']]) self.put(self.sn[OFF_VERSION][0], self.sn[OFF_VERSION][1], self.out_ann, [ANN_FIELDS, ['Version %d' % self.cache[-2]]]) self.put(self.sn[OFF_VERSION+1][0], self.sn[OFF_VERSION+1][1], self.out_ann, [ANN_FIELDS, ['Revision %d' % self.cache[-1]]]) elif self.cnt == OFF_CHROM: self.put(self.sn[OFF_BASIC][0], es, self.out_ann, [ANN_SECTIONS, ['Basic display']]) self.decode_basicdisplay(-5) elif self.cnt == OFF_EST_TIMING: self.put(self.sn[OFF_CHROM][0], es, self.out_ann, [ANN_SECTIONS, ['Color characteristics']]) self.decode_chromaticity(-10) elif self.cnt == OFF_STD_TIMING: self.put(self.sn[OFF_EST_TIMING][0], es, self.out_ann, [ANN_SECTIONS, ['Established timings']]) self.decode_est_timing(-3) elif self.cnt == OFF_DET_TIMING: self.put(self.sn[OFF_STD_TIMING][0], es, self.out_ann, [ANN_SECTIONS, ['Standard timings']]) self.decode_std_timing(self.cnt - 16) elif self.cnt == OFF_NUM_EXT: self.decode_descriptors(-72) elif self.cnt == OFF_CHECKSUM: self.put(ss, es, self.out_ann, [0, ['Extensions present: %d' % self.cache[self.cnt-1]]]) elif self.cnt == OFF_CHECKSUM+1: checksum = 0 for i in range(128): checksum += self.cache[i] if checksum % 256 == 0: csstr = 'OK' else: csstr = 'WRONG!' self.put(ss, es, self.out_ann, [0, ['Checksum: %d (%s)' % ( self.cache[self.cnt-1], csstr)]]) self.state = 'extensions' elif self.state == 'extensions': cache = self.ext_cache[self.extension - 1] sn = self.ext_sn[self.extension - 1] v = cache[self.cnt - 1] if self.cnt == 1: if v == 2: self.put(ss, es, self.out_ann, [1, ['Extensions Tag', 'Tag']]) else: self.put(ss, es, self.out_ann, [1, ['Bad Tag']]) elif self.cnt == 2: self.put(ss, es, self.out_ann, [1, ['Version']]) self.put(ss, es, self.out_ann, [0, [str(v)]]) elif self.cnt == 3: self.put(ss, es, self.out_ann, [1, ['DTD offset']]) self.put(ss, es, self.out_ann, [0, [str(v)]]) elif self.cnt == 4: self.put(ss, es, self.out_ann, [1, ['Format support | DTD count']]) support = "Underscan: {0}, {1} Audio, YCbCr: {2}".format( "yes" if v & 0x80 else "no", "Basic" if v & 0x40 else "No", ["None", "422", "444", "422+444"][(v & 0x30) >> 4]) self.put(ss, es, self.out_ann, [0, ['{0}, DTDs: {1}'.format(support, v & 0xf)]]) elif self.cnt <= cache[2]: if self.cnt == cache[2]: self.put(sn[4][0], es, self.out_ann, [1, ['Data block collection']]) self.decode_data_block_collection(cache[4:], sn[4:]) elif (self.cnt - cache[2]) % 18 == 0: n = (self.cnt - cache[2]) / 18 if n <= cache[3] & 0xf: self.put(sn[self.cnt - 18][0], es, self.out_ann, [1, ['DTD']]) self.decode_descriptors(-18) elif self.cnt == 127: dtd_last = cache[2] + (cache[3] & 0xf) * 18 self.put(sn[dtd_last][0], es, self.out_ann, [1, ['Padding']]) elif self.cnt == 128: checksum = sum(cache) % 256 self.put(ss, es, self.out_ann, [0, ['Checksum: %d (%s)' % ( cache[self.cnt-1], 'Wrong' if checksum else 'OK')]]) def ann_field(self, start, end, annotation): annotation = annotation if isinstance(annotation, list) else [annotation] if self.extension: sn = self.ext_sn[self.extension - 1] else: sn = self.sn self.put(sn[start][0], sn[end][1], self.out_ann, [ANN_FIELDS, annotation]) def lookup_pnpid(self, pnpid): pnpid_file = os.path.join(os.path.dirname(__file__), 'pnpids.txt') if os.path.exists(pnpid_file): for line in open(pnpid_file).readlines(): if line.find(pnpid + ';') == 0: return line[4:].strip() return '' def decode_vid(self, offset): pnpid = chr(64 + ((self.cache[offset] & 0x7c) >> 2)) pnpid += chr(64 + (((self.cache[offset] & 0x03) << 3) | ((self.cache[offset+1] & 0xe0) >> 5))) pnpid += chr(64 + (self.cache[offset+1] & 0x1f)) vendor = self.lookup_pnpid(pnpid) if vendor: pnpid += ' (%s)' % vendor self.ann_field(offset, offset+1, pnpid) def decode_pid(self, offset): pidstr = 'Product 0x%.2x%.2x' % (self.cache[offset+1], self.cache[offset]) self.ann_field(offset, offset+1, pidstr) def decode_serial(self, offset): serialnum = (self.cache[offset+3] << 24) \ + (self.cache[offset+2] << 16) \ + (self.cache[offset+1] << 8) \ + self.cache[offset] serialstr = '' is_alnum = True for i in range(4): if not chr(self.cache[offset+3-i]).isalnum(): is_alnum = False break serialstr += chr(self.cache[offset+3-i]) serial = serialstr if is_alnum else str(serialnum) self.ann_field(offset, offset+3, 'Serial ' + serial) def decode_mfrdate(self, offset): datestr = '' if self.cache[offset]: datestr += 'week %d, ' % self.cache[offset] datestr += str(1990 + self.cache[offset+1]) if datestr: self.ann_field(offset, offset+1, ['Manufactured ' + datestr, datestr]) def decode_basicdisplay(self, offset): # Video input definition vid = self.cache[offset] if vid & 0x80: # Digital self.ann_field(offset, offset, 'Video input: VESA DFP 1.') else: # Analog sls = (vid & 60) >> 5 self.ann_field(offset, offset, 'Signal level standard: %.2x' % sls) if vid & 0x10: self.ann_field(offset, offset, 'Blank-to-black setup expected') syncs = '' if vid & 0x08: syncs += 'separate syncs, ' if vid & 0x04: syncs += 'composite syncs, ' if vid & 0x02: syncs += 'sync on green, ' if vid & 0x01: syncs += 'Vsync serration required, ' if syncs: self.ann_field(offset, offset, 'Supported syncs: %s' % syncs[:-2]) # Max horizontal/vertical image size if self.cache[offset+1] != 0 and self.cache[offset+2] != 0: # Projectors have this set to 0 sizestr = '%dx%dcm' % (self.cache[offset+1], self.cache[offset+2]) self.ann_field(offset+1, offset+2, 'Physical size: ' + sizestr) # Display transfer characteristic (gamma) if self.cache[offset+3] != 0xff: gamma = (self.cache[offset+3] + 100) / 100 self.ann_field(offset+3, offset+3, 'Gamma: %1.2f' % gamma) # Feature support fs = self.cache[offset+4] dpms = '' if fs & 0x80: dpms += 'standby, ' if fs & 0x40: dpms += 'suspend, ' if fs & 0x20: dpms += 'active off, ' if dpms: self.ann_field(offset+4, offset+4, 'DPMS support: %s' % dpms[:-2]) dt = (fs & 0x18) >> 3 dtstr = '' if dt == 0: dtstr = 'Monochrome' elif dt == 1: dtstr = 'RGB color' elif dt == 2: dtstr = 'non-RGB multicolor' if dtstr: self.ann_field(offset+4, offset+4, 'Display type: %s' % dtstr) if fs & 0x04: self.ann_field(offset+4, offset+4, 'Color space: standard sRGB') # Save this for when we decode the first detailed timing descriptor self.have_preferred_timing = (fs & 0x02) == 0x02 if fs & 0x01: gft = '' else: gft = 'not ' self.ann_field(offset+4, offset+4, 'Generalized timing formula: %ssupported' % gft) def convert_color(self, value): # Convert from 10-bit packet format to float outval = 0.0 for i in range(10): if value & 0x01: outval += 2 ** -(10-i) value >>= 1 return outval def decode_chromaticity(self, offset): redx = (self.cache[offset+2] << 2) + ((self.cache[offset] & 0xc0) >> 6) redy = (self.cache[offset+3] << 2) + ((self.cache[offset] & 0x30) >> 4) self.ann_field(offset, offset+9, 'Chromacity red: X %1.3f, Y %1.3f' % ( self.convert_color(redx), self.convert_color(redy))) greenx = (self.cache[offset+4] << 2) + ((self.cache[offset] & 0x0c) >> 6) greeny = (self.cache[offset+5] << 2) + ((self.cache[offset] & 0x03) >> 4) self.ann_field(offset, offset+9, 'Chromacity green: X %1.3f, Y %1.3f' % ( self.convert_color(greenx), self.convert_color(greeny))) bluex = (self.cache[offset+6] << 2) + ((self.cache[offset+1] & 0xc0) >> 6) bluey = (self.cache[offset+7] << 2) + ((self.cache[offset+1] & 0x30) >> 4) self.ann_field(offset, offset+9, 'Chromacity blue: X %1.3f, Y %1.3f' % ( self.convert_color(bluex), self.convert_color(bluey))) whitex = (self.cache[offset+8] << 2) + ((self.cache[offset+1] & 0x0c) >> 6) whitey = (self.cache[offset+9] << 2) + ((self.cache[offset+1] & 0x03) >> 4) self.ann_field(offset, offset+9, 'Chromacity white: X %1.3f, Y %1.3f' % ( self.convert_color(whitex), self.convert_color(whitey))) def decode_est_timing(self, offset): # Pre-EDID modes bitmap = (self.cache[offset] << 9) \ + (self.cache[offset+1] << 1) \ + ((self.cache[offset+2] & 0x80) >> 7) modestr = '' for i in range(17): if bitmap & (1 << (16-i)): modestr += est_modes[i] + ', ' if modestr: self.ann_field(offset, offset+2, 'Supported established modes: %s' % modestr[:-2]) def decode_std_timing(self, offset): modestr = '' for i in range(0, 16, 2): if self.cache[offset+i] == 0x01 and self.cache[offset+i+1] == 0x01: # Unused field continue x = (self.cache[offset+i] + 31) * 8 ratio = (self.cache[offset+i+1] & 0xc0) >> 6 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") if self.extension: sn = self.ext_sn[extension - 1] else: sn = 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