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Diffstat (limited to 'lib/Parse/EDID.pm')
| -rwxr-xr-x | lib/Parse/EDID.pm | 699 |
1 files changed, 699 insertions, 0 deletions
diff --git a/lib/Parse/EDID.pm b/lib/Parse/EDID.pm new file mode 100755 index 0000000..fb57416 --- /dev/null +++ b/lib/Parse/EDID.pm @@ -0,0 +1,699 @@ +# Copyright (C) 2005-2010 by Mandriva SA +# Pascal Rigaux +# Anssi Hannula +# +# 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, 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 <http://www.gnu.org/licenses/>. + +package Parse::EDID; + +use strict; +use warnings; + +my @CVT_ratios = qw(5/4 4/3 3/2 16/10 15/9 16/9); +my @known_ratios = @CVT_ratios; + +my @edid_info = group_by2( + a8 => '_header', + a2 => 'manufacturer_name', + + v => 'product_code', + V => 'serial_number', + C => 'week', + C => 'year', + C => 'edid_version', + C => 'edid_revision', + a => 'video_input_definition', + + C => 'max_size_horizontal', # in cm, 0 on projectors + C => 'max_size_vertical', # in cm, 0 on projectors + C => 'gamma', + a => 'feature_support', + a10 => '_color_characteristics', + a3 => 'established_timings', + a16 => 'standard_timings', + a72 => 'monitor_details', + + C => 'extension_flag', + C => 'checksum', +); + +my %subfields = ( + manufacturer_name => [ group_by2( + 1 => '', + 5 => '1', + 5 => '2', + 5 => '3', + ) ], + + video_input_definition => [ group_by2( + 1 => 'digital', + 1 => 'separate_sync', + 1 => 'composite_sync', + 1 => 'sync_on_green', + 2 => '', + 2 => 'voltage_level', + ) ], + + feature_support => [ group_by2( + 1 => 'DPMS_standby', + 1 => 'DPMS_suspend', + 1 => 'DPMS_active_off', + 1 => 'rgb', + + 1 => '', + 1 => 'sRGB_compliance', + 1 => 'has_preferred_timing', + 1 => 'GTF_compliance', + ) ], + + established_timings => [ group_by2( + 1 => '720x400_70', + 1 => '720x400_88', + 1 => '640x480_60', + 1 => '640x480_67', + 1 => '640x480_72', + 1 => '640x480_75', + 1 => '800x600_56', + 1 => '800x600_60', + 1 => '800x600_72', + 1 => '800x600_75', + 1 => '832x624_75', + 1 => '1024x768_87i', + 1 => '1024x768_60', + 1 => '1024x768_70', + 1 => '1024x768_75', + 1 => '1280x1024_75', + ) ], + + detailed_timing => [ group_by2( + 8 => 'horizontal_active', + 8 => 'horizontal_blanking', + 4 => 'horizontal_active_hi', + 4 => 'horizontal_blanking_hi', + 8 => 'vertical_active', + 8 => 'vertical_blanking', + 4 => 'vertical_active_hi', + 4 => 'vertical_blanking_hi', + 8 => 'horizontal_sync_offset', + 8 => 'horizontal_sync_pulse_width', + 4 => 'vertical_sync_offset', + 4 => 'vertical_sync_pulse_width', + 2 => 'horizontal_sync_offset_hi', + 2 => 'horizontal_sync_pulse_width_hi', + 2 => 'vertical_sync_offset_hi', + 2 => 'vertical_sync_pulse_width_hi', + 8 => 'horizontal_image_size', # in mm + 8 => 'vertical_image_size', # in mm + 4 => 'horizontal_image_size_hi', + 4 => 'vertical_image_size_hi', + 8 => 'horizontal_border', + 8 => 'vertical_border', + + 1 => 'interlaced', + 2 => 'stereo', + 2 => 'digital_composite', + 1 => 'horizontal_sync_positive', + 1 => 'vertical_sync_positive', + 1 => '', + ) ], + + standard_timing => [ group_by2( + 8 => 'X', + 2 => 'aspect', + 6 => 'vfreq', + ) ], + monitor_range => [ group_by2( + 8 => 'vertical_min', + 8 => 'vertical_max', + 8 => 'horizontal_min', + 8 => 'horizontal_max', + 8 => 'pixel_clock_max', + ) ], + + manufacturer_specified_range_timing => [ group_by2( + # http://www.spwg.org/salisbury_march_19_2002.pdf + # for the glossary: http://www.vesa.org/Public/PSWG/PSWG15v1.pdf + 8 => 'horizontal_sync_pulse_width_min', # HSPW (Horizontal Sync Pulse Width) + 8 => 'horizontal_sync_pulse_width_max', + 8 => 'horizontal_back_porch_min', # t_hbp + 8 => 'horizontal_back_porch_max', + 8 => 'vertical_sync_pulse_width_min', # VSPW (Vertical Sync Pulse Width) + 8 => 'vertical_sync_pulse_width_max', + 8 => 'vertical_back_porch_min', # t_vbp (Vertical Back Porch) + 8 => 'vertical_back_porch_max', + 8 => 'horizontal_blanking_min', # t_hp (Horizontal Period) + 8 => 'horizontal_blanking_max', + 8 => 'vertical_blanking_min', # t_vp + 8 => 'vertical_blanking_max', + 8 => 'module_revision', + ) ], + + cea_data_block_collection => [ group_by2( + 3 => 'type', + 5 => 'size', + ) ], + + cea_video_data_block => [ group_by2( + 1 => 'native', + 7 => 'mode', + ) ], +); + +my @cea_video_mode_to_detailed_timing = ('pixel_clock', 'horizontal_active', 'vertical_active', 'aspect', + 'horizontal_blanking', 'horizontal_sync_offset', 'horizontal_sync_pulse_width', + 'vertical_blanking', 'vertical_sync_offset', 'vertical_sync_pulse_width', + 'horizontal_sync_positive', 'vertical_sync_positive', 'interlaced'); + +my @cea_video_modes = ( +# [0] pixel clock, [1] X, [2] Y, [3] aspect, [4] Hblank, [5] Hsync_offset, [6] Hsync_pulse_width, +# [7] Vblank, [8] Vsync_offset, [9] Vsync_pulse_width, [10] Hsync+, [11] Vsync+, [12] interlaced +# 59.94/29.97 and similar modes also have a 60.00/30.00 counterpart by raising the pixel clock + [ 25.175, 640, 480, "4/3", 160, 16, 96, 45, 10, 2, 0, 0, 0 ], # 1: 640x 480@59.94 + [ 27.000, 720, 480, "4/3", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 2: 720x 480@59.94 + [ 27.000, 720, 480, "16/9", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 3: 720x 480@59.94 + [ 74.250, 1280, 720, "16/9", 370, 110, 40, 30, 5, 5, 1, 1, 0 ], # 4: 1280x 720@60.00 + [ 74.250, 1920, 1080, "16/9", 280, 88, 44, 45, 4, 10, 1, 1, 1 ], # 5: 1920x1080@30.00 + [ 27.000, 1440, 480, "4/3", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 6: 1440x 480@29.97 + [ 27.000, 1440, 480, "16/9", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 7: 1440x 480@29.97 + [ 27.000, 1440, 240, "4/3", 276, 38, 124, 22, 4, 3, 0, 0, 0 ], # 8: 1440x 240@60.05 + [ 27.000, 1440, 240, "16/9", 276, 38, 124, 22, 4, 3, 0, 0, 0 ], # 9: 1440x 240@60.05 + [ 54.000, 2880, 480, "4/3", 552, 76, 248, 45, 8, 6, 0, 0, 1 ], # 10: 2880x 480@29.97 + [ 54.000, 2880, 480, "16/9", 552, 76, 248, 45, 8, 6, 0, 0, 1 ], # 11: 2880x 480@29.97 + [ 54.000, 2880, 240, "4/3", 552, 76, 248, 22, 4, 3, 0, 0, 0 ], # 12: 2880x 240@60.05 + [ 54.000, 2880, 240, "16/9", 552, 76, 248, 22, 4, 3, 0, 0, 0 ], # 13: 2880x 240@60.05 + [ 54.000, 1440, 480, "4/3", 276, 32, 124, 45, 9, 6, 0, 0, 0 ], # 14: 1440x 480@59.94 + [ 54.000, 1440, 480, "16/9", 276, 32, 124, 45, 9, 6, 0, 0, 0 ], # 15: 1440x 480@59.94 + [ 148.500, 1920, 1080, "16/9", 280, 88, 44, 45, 4, 5, 1, 1, 0 ], # 16: 1920x1080@60.00 + [ 27.000, 720, 576, "4/3", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 17: 720x 576@50.00 + [ 27.000, 720, 576, "16/9", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 18: 720x 576@50.00 + [ 74.250, 1280, 720, "16/9", 700, 440, 40, 30, 5, 5, 1, 1, 0 ], # 19: 1280x 720@50.00 + [ 74.250, 1920, 1080, "16/9", 720, 528, 44, 45, 4, 10, 1, 1, 1 ], # 20: 1920x1080@25.00 + [ 27.000, 1440, 576, "4/3", 288, 24, 126, 49, 4, 6, 0, 0, 1 ], # 21: 1440x 576@25.00 + [ 27.000, 1440, 576, "16/9", 288, 24, 126, 49, 4, 6, 0, 0, 1 ], # 22: 1440x 576@25.00 + [ 27.000, 1440, 288, "4/3", 288, 24, 126, 24, 2, 3, 0, 0, 0 ], # 23: 1440x 288@50.08 + [ 27.000, 1440, 288, "16/9", 288, 24, 126, 24, 2, 3, 0, 0, 0 ], # 24: 1440x 288@50.08 + [ 54.000, 2880, 576, "4/3", 576, 48, 252, 49, 4, 6, 0, 0, 1 ], # 25: 2880x 576@25.00 + [ 54.000, 2880, 576, "16/9", 576, 48, 252, 49, 4, 6, 0, 0, 1 ], # 26: 2880x 576@25.00 + [ 54.000, 2880, 288, "4/3", 576, 48, 252, 24, 2, 3, 0, 0, 0 ], # 27: 2880x 288@50.08 + [ 54.000, 2880, 288, "16/9", 576, 48, 252, 24, 2, 3, 0, 0, 0 ], # 28: 2880x 288@50.08 + [ 54.000, 1440, 576, "4/3", 288, 24, 128, 49, 5, 5, 0, 0, 0 ], # 29: 1440x 576@50.00 + [ 54.000, 1440, 576, "16/9", 288, 24, 128, 49, 5, 5, 0, 0, 0 ], # 30: 1440x 576@50.00 + [ 148.500, 1920, 1080, "16/9", 720, 528, 44, 45, 4, 5, 1, 1, 0 ], # 31: 1920x1080@50.00 + [ 74.250, 1920, 1080, "16/9", 830, 638, 44, 45, 4, 5, 1, 1, 0 ], # 32: 1920x1080@24.00 + [ 74.250, 1920, 1080, "16/9", 720, 528, 44, 45, 4, 5, 1, 1, 0 ], # 33: 1920x1080@25.00 + [ 74.250, 1920, 1080, "16/9", 280, 88, 44, 45, 4, 5, 1, 1, 0 ], # 34: 1920x1080@30.00 + [ 108.000, 2880, 480, "4/3", 552, 64, 248, 45, 9, 6, 0, 0, 0 ], # 35: 2880x 480@59.94 + [ 108.000, 2880, 480, "16/9", 552, 64, 248, 45, 9, 6, 0, 0, 0 ], # 36: 2880x 480@59.94 + [ 108.000, 2880, 576, "4/3", 576, 48, 256, 49, 5, 5, 0, 0, 0 ], # 37: 2880x 576@50.00 + [ 108.000, 2880, 576, "16/9", 576, 48, 256, 49, 5, 5, 0, 0, 0 ], # 38: 2880x 576@50.00 + [ 72.000, 1920, 1080, "16/9", 384, 32, 168, 170, 46, 10, 1, 0, 1 ], # 39: 1920x1080@25.00 + [ 148.500, 1920, 1080, "16/9", 720, 528, 44, 45, 4, 10, 1, 1, 1 ], # 40: 1920x1080@50.00 + [ 148.500, 1280, 720, "16/9", 700, 440, 40, 30, 5, 5, 1, 1, 0 ], # 41: 1280x 720@100.00 + [ 54.000, 720, 576, "4/3", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 42: 720x 576@100.00 + [ 54.000, 720, 576, "16/9", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 43: 720x 576@100.00 + [ 54.000, 1440, 576, "4/3", 288, 24, 126, 49, 4, 6, 0, 0, 0 ], # 44: 1440x 576@50.00 + [ 54.000, 1440, 576, "16/9", 288, 24, 126, 49, 4, 6, 0, 0, 0 ], # 45: 1440x 576@50.00 + [ 148.500, 1920, 1080, "16/9", 280, 88, 44, 45, 4, 10, 1, 1, 1 ], # 46: 1920x1080@60.00 + [ 148.500, 1280, 720, "16/9", 370, 110, 40, 30, 5, 5, 1, 1, 0 ], # 47: 1280x 720@120.00 + [ 54.000, 720, 480, "4/3", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 48: 720x 480@119.88 + [ 54.000, 720, 480, "16/9", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 49: 720x 480@119.88 + [ 54.000, 1440, 480, "4/3", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 50: 1440x 480@59.94 + [ 54.000, 1440, 480, "16/9", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 51: 1440x 480@59.94 + [ 108.000, 720, 576, "4/3", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 52: 720x 576@200.00 + [ 108.000, 720, 576, "16/9", 144, 12, 64, 49, 5, 5, 0, 0, 0 ], # 53: 720x 576@200.00 + [ 108.000, 1440, 576, "4/3", 288, 24, 126, 49, 4, 6, 0, 0, 1 ], # 54: 1440x 576@100.00 + [ 108.000, 1440, 576, "16/9", 288, 24, 126, 49, 4, 6, 0, 0, 1 ], # 55: 1440x 576@100.00 + [ 108.000, 720, 480, "4/3", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 56: 720x 480@239.76 + [ 108.000, 720, 480, "16/9", 138, 16, 62, 45, 9, 6, 0, 0, 0 ], # 57: 720x 480@239.76 + [ 108.000, 1440, 480, "4/3", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 58: 1440x 480@119.88 + [ 108.000, 1440, 480, "16/9", 276, 38, 124, 45, 8, 6, 0, 0, 1 ], # 59: 1440x 480@119.88 + [ 59.400, 1280, 720, "16/9", 2020, 1760, 40, 30, 5, 5, 1, 1, 0 ], # 60: 1280x 720@24.00 + [ 74.250, 1280, 720, "16/9", 2680, 2420, 40, 30, 5, 5, 1, 1, 0 ], # 61: 1280x 720@25.00 + [ 74.250, 1280, 720, "16/9", 2020, 1760, 40, 30, 5, 5, 1, 1, 0 ], # 62: 1280x 720@30.00 + [ 297.000, 1920, 1080, "16/9", 280, 88, 44, 45, 4, 5, 1, 1, 0 ], # 63: 1920x1080@120.00 + [ 297.000, 1920, 1080, "16/9", 720, 528, 44, 45, 4, 10, 1, 1, 0 ], # 64: 1920x1080@100.00 +); + +sub within_limit { + my ($value, $type, $limit) = @_; + $type eq 'min' ? $value >= $limit : $value <= $limit; +} + +sub get_many_bits { + my ($s, $field_name) = @_; + my @bits = split('', unpack('B*', $s)); + my %h; + foreach (@{$subfields{$field_name}}) { + my ($size, $field) = @$_; + my @l = ('0' x (8 - $size), splice(@bits, 0, $size)); + $h{$field} = unpack("C", pack('B*', join('', @l))) if $field && $field !~ /^_/; + } + \%h; +} + +sub check_parsed_edid { + my ($edid) = @_; + + $edid->{edid_version} >= 1 && $edid->{edid_version} <= 2 or return 'bad edid_version'; + $edid->{edid_revision} != 0xff or return 'bad edid_revision'; + + if ($edid->{monitor_range}) { + $edid->{monitor_range}{horizontal_min} && + $edid->{monitor_range}{horizontal_min} <= $edid->{monitor_range}{horizontal_max} + or return 'bad HorizSync'; + $edid->{monitor_range}{vertical_min} && + $edid->{monitor_range}{vertical_min} <= $edid->{monitor_range}{vertical_max} + or return 'bad VertRefresh'; + } + + ''; +} + +sub build_detailed_timing { + my ($pixel_clock, $vv) = @_; + + my $h = get_many_bits($vv, 'detailed_timing'); + $h->{pixel_clock} = $pixel_clock / 100; # to have it in MHz + my %detailed_timing_field_size = map { $_->[1], $_->[0] } @{$subfields{detailed_timing}}; + foreach my $field (keys %detailed_timing_field_size) { + $field =~ s/_hi$// or next; + my $hi = delete($h->{$field . '_hi'}); + $h->{$field} += $hi << $detailed_timing_field_size{$field}; + } + $h; +} + +sub add_standard_timing_modes { + my ($edid, $v) = @_; + + my @aspect2ratio = ( + $edid->{edid_version} > 1 || $edid->{edid_revision} > 2 ? '16/10' : '1/1', + '4/3', '5/4', '16/9', + ); + $v = [ map { + my $h = get_many_bits($_, 'standard_timing'); + $h->{X} = ($h->{X} + 31) * 8; + if ($_ ne "\x20\x20" && $h->{X} > 256) { # cf VALID_TIMING in Xorg edid.h + $h->{vfreq} += 60; + if ($h->{ratio} = $aspect2ratio[$h->{aspect}]) { + delete $h->{aspect}; + $h->{Y} = $h->{X} / eval($h->{ratio}); + } + $h; + } else { () } + } unpack('a2' x (length($v) / 2), $v) ]; + $v; +} + +sub parse_edid { + my ($raw_edid, $verbose) = @_; + + my %edid; + my ($main_edid, @eedid_blocks) = unpack("a128" x (length($raw_edid) / 128), $raw_edid); + my @vals = unpack(join('', map { $_->[0] } @edid_info), $main_edid); + my $i; + foreach (@edid_info) { + my ($field, $v) = ($_->[1], $vals[$i++]); + + if ($field eq 'year') { + $v += 1990; + } elsif ($field eq 'manufacturer_name') { + my $h = get_many_bits($v, 'manufacturer_name'); + $v = join('', map { chr(ord('A') + $h->{$_} - 1) } 1 .. 3); + $v = "" if $v eq "@@@"; + } elsif ($field eq 'video_input_definition') { + $v = get_many_bits($v, 'video_input_definition'); + } elsif ($field eq 'feature_support') { + $v = get_many_bits($v, 'feature_support'); + } elsif ($field eq 'established_timings') { + my $h = get_many_bits($v, 'established_timings'); + $v = [ + sort { $a->{X} <=> $b->{X} || $a->{vfreq} <=> $b->{vfreq} } + map { /(\d+)x(\d+)_(\d+)(i?)/ ? { X => $1, Y => $2, vfreq => $3, $4 ? (interlace => 1) : () } : () } + grep { $h->{$_} } keys %$h ]; + } elsif ($field eq 'standard_timings') { + $v = add_standard_timing_modes(\%edid, $v); + } elsif ($field eq 'monitor_details') { + while ($v) { + (my $pixel_clock, my $vv, $v) = unpack("v a16 a*", $v); + + if ($pixel_clock) { + # detailed timing + my $h = build_detailed_timing($pixel_clock, $vv); + push @{$edid{detailed_timings}}, $h + if $h->{horizontal_active} > 1 && $h->{vertical_active} > 1; + } else { + (my $flag, $vv) = unpack("n x a*", $vv); + + if ($flag == 0xfd) { + # range + $edid{monitor_range} = get_many_bits($vv, 'monitor_range'); + if ($edid{monitor_range}{pixel_clock_max} == 0xff) { + delete $edid{monitor_range}{pixel_clock_max}; + } else { + $edid{monitor_range}{pixel_clock_max} *= 10; #- to have it in MHz + } + } elsif ($flag == 0xf) { + my $range = get_many_bits($vv, 'manufacturer_specified_range_timing'); + + my $e = $edid{detailed_timings}[0]; + my $valid = 1; + foreach my $m ('min', 'max') { + my %total; + foreach my $dir ('horizontal', 'vertical') { + $range->{$dir . '_sync_pulse_width_' . $m} *= 2; + $range->{$dir . '_back_porch_' . $m} *= 2; + $range->{$dir . '_blanking_' . $m} *= 2; + if ($e && $e->{$dir . '_active'} + && within_limit($e->{$dir . '_blanking'}, $m, $range->{$dir . '_blanking_' . $m}) + && within_limit($e->{$dir . '_sync_pulse_width'}, $m, $range->{$dir . '_sync_pulse_width_' . $m}) + && within_limit($e->{$dir . '_blanking'} - $e->{$dir . '_sync_offset'} - $e->{$dir . '_sync_pulse_width'}, + $m, $range->{$dir . '_back_porch_' . $m})) { + $total{$dir} = $e->{$dir . '_active'} + $range->{$dir . '_blanking_' . $m}; + } + } + if ($total{horizontal} && $total{vertical}) { + my $hfreq = $e->{pixel_clock} * 1000 / $total{horizontal}; + my $vfreq = $hfreq * 1000 / $total{vertical}; + $range->{'horizontal_' . ($m eq 'min' ? 'max' : 'min')} = round($hfreq); + $range->{'vertical_' . ($m eq 'min' ? 'max' : 'min')} = round($vfreq); + } else { + $valid = 0; + } + } + $edid{$valid ? 'monitor_range' : 'manufacturer_specified_range_timing'} = $range; + + } elsif ($flag == 0xfa) { + push @{$edid{standard_timings}}, add_standard_timing_modes(\%edid, unpack('a12', $vv)); + } elsif ($flag == 0xfc) { + my $prev = $edid{monitor_name}; + $edid{monitor_name} = ($prev ? "$prev " : '') . unpack('A13', $vv); + } elsif ($flag == 0xfe) { + push @{$edid{monitor_text}}, unpack('A13', $vv); + } elsif ($flag == 0xff) { + push @{$edid{serial_number2}}, unpack('A13', $vv); + } else { + $verbose && $vv ne "\0" x 13 && $vv ne " " x 13 and + warn "parse_edid: unknown flag $flag\n"; + } + } + } + } + + $edid{$field} = $v if $field && $field !~ /^_/; + } + + foreach (@eedid_blocks) { + my ($tag, $v) = unpack("C a*", $_); + + if ($tag == 0x02) { # CEA EDID + my $dtd_offset; + ($dtd_offset, $v) = unpack("x C x a*", $v); + + next if $dtd_offset < 4; + $dtd_offset -= 4; + + while ($dtd_offset > 0) { + my $h = get_many_bits($v, 'cea_data_block_collection'); + $dtd_offset -= $h->{size} + 1; + + my $vv; + ($vv, $v) = unpack("x a$h->{size} a*", $v); + if ($h->{type} == 0x02) { # Video Data Block + my @vmodes = unpack("a" x $h->{size}, $vv); + foreach my $vmode (@vmodes) { + $h = get_many_bits($vmode, 'cea_video_data_block'); + my $cea_mode = $cea_video_modes[$h->{mode} - 1]; + if (!$cea_mode) { + warn "parse_edid: unhandled CEA mode $h->{mode}\n" if $verbose; + next; + } + my %det_mode = (source => 'cea_vdb'); + @det_mode{@cea_video_mode_to_detailed_timing} = @$cea_mode; + push @{$edid{detailed_timings}}, \%det_mode; + } + } + } + + while (length($v) >= 18) { + (my $pixel_clock, my $vv, $v) = unpack("v a16 a*", $v); + last if !$pixel_clock; + my $h = build_detailed_timing($pixel_clock, $vv); + push @{$edid{detailed_timings}}, $h + if $h->{horizontal_active} > 1 && $h->{vertical_active} > 1; + } + } else { + $verbose && warn "parse_edid: unknown tag $tag\n"; + } + } + + $edid{max_size_precision} = 'cm'; + $edid{EISA_ID} = $edid{manufacturer_name} . sprintf('%04x', $edid{product_code}) if $edid{product_code} && $edid{manufacturer_name}; + + if ($edid{monitor_range}) { + $edid{HorizSync} = $edid{monitor_range}{horizontal_min} . '-' . $edid{monitor_range}{horizontal_max}; + $edid{VertRefresh} = $edid{monitor_range}{vertical_min} . '-' . $edid{monitor_range}{vertical_max}; + } + + if ($edid{max_size_vertical}) { + $edid{ratio} = $edid{max_size_horizontal} / $edid{max_size_vertical}; + $edid{ratio_name} = ratio_name($edid{max_size_horizontal}, $edid{max_size_vertical}, 'cm'); + $edid{ratio_precision} = 'cm'; + } + + if ($edid{feature_support}{has_preferred_timing} && $edid{detailed_timings}[0]) { + $edid{detailed_timings}[0]{preferred} = 1; + } + + foreach my $h (@{$edid{detailed_timings}}) { + + # EDID standard is ambiguous on how interlaced modes should be + # specified; workaround clearly broken modes: + if ($h->{interlaced}) { + foreach ("720x480", "1440x480", "2880x480", "720x576", "1440x576", "2880x576", "1920x1080") { + if ($_ eq $h->{horizontal_active} . 'x' . $h->{vertical_active} * 2) { + $h->{vertical_active} *= 2; + $h->{vertical_blanking} *= 2; + $h->{vertical_sync_offset} *= 2; + $h->{vertical_sync_pulse_width} *= 2; + $h->{vertical_blanking} |= 1; + } + } + } + + # if the mm size given in the detailed_timing is not far from the cm size + # put it as a more precise cm size + my %in_cm = map { $_ => $h->{$_ . '_image_size'} / 10 } ('horizontal', 'vertical'); + my ($error) = sort { $b <=> $a } map { abs($edid{'max_size_' . $_} - $in_cm{$_}) } keys %in_cm; + if ($error <= 0.5) { + $edid{'max_size_' . $_} = $in_cm{$_} foreach keys %in_cm; + $edid{max_size_precision} = 'mm'; + } + if ($error < 1 && $in_cm{vertical}) { + # using it for the ratio + $edid{ratio} = $in_cm{horizontal} / $in_cm{vertical}; + $edid{ratio_name} = ratio_name($in_cm{horizontal}, $in_cm{vertical}, 'mm'); + $edid{ratio_precision} = 'mm'; + } + + $h->{bad_ratio} = 1 if abs($edid{ratio} - $h->{horizontal_active} / $h->{vertical_active}) > ($edid{ratio_precision} eq 'mm' ? 0.02 : 0.2); + + if ($edid{max_size_vertical}) { + $h->{vertical_dpi} = $h->{vertical_active} / $edid{max_size_vertical} * 2.54; + } + if ($edid{max_size_horizontal}) { + $h->{horizontal_dpi} = $h->{horizontal_active} / $edid{max_size_horizontal} * 2.54; + } + my $dpi_string = ''; + if ($h->{vertical_dpi} && $h->{horizontal_dpi}) { + $dpi_string = + abs($h->{vertical_dpi} / $h->{horizontal_dpi} - 1) < 0.05 ? + sprintf("%d dpi", $h->{horizontal_dpi}) : + sprintf("%dx%d dpi", $h->{horizontal_dpi}, $h->{vertical_dpi}); + } + + my $horizontal_total = $h->{horizontal_active} + $h->{horizontal_blanking}; + my $vertical_total = $h->{vertical_active} + $h->{vertical_blanking}; + + $h->{ModeLine_comment} = sprintf qq(# Monitor %s%s modeline (%.1f Hz vsync, %.1f kHz hsync, %sratio %s%s)), + $h->{preferred} ? "preferred" : "supported", + $h->{source} eq 'cea_vdb' ? " CEA" : '', + $h->{pixel_clock} / $horizontal_total / $vertical_total * 1000 * 1000 * ($h->{interlaced} ? 2 : 1), + $h->{pixel_clock} / $horizontal_total * 1000, + $h->{interlaced} ? "interlaced, " : '', + nearest_ratio($h->{horizontal_active} / $h->{vertical_active}, 0.01) || sprintf("%.2f", $h->{horizontal_active} / $h->{vertical_active}), + $dpi_string ? ", $dpi_string" : ''; + + $h->{ModeLine} = sprintf qq("%dx%d" $h->{pixel_clock} %d %d %d %d %d %d %d %d %shsync %svsync%s), + $h->{horizontal_active}, $h->{vertical_active}, + + $h->{horizontal_active}, + $h->{horizontal_active} + $h->{horizontal_sync_offset}, + $h->{horizontal_active} + $h->{horizontal_sync_offset} + $h->{horizontal_sync_pulse_width}, + $horizontal_total, + + $h->{vertical_active}, + $h->{vertical_active} + $h->{vertical_sync_offset}, + $h->{vertical_active} + $h->{vertical_sync_offset} + $h->{vertical_sync_pulse_width}, + $vertical_total, + + $h->{horizontal_sync_positive} ? '+' : '-', + $h->{vertical_sync_positive} ? '+' : '-', + $h->{interlaced} ? ' Interlace' : ''; + } + + $edid{diagonal_size} = sqrt(sqr($edid{max_size_horizontal}) + + sqr($edid{max_size_vertical})) / 2.54; + + \%edid; +} + +sub nearest_ratio { + my ($ratio, $max_error) = @_; + my @sorted = + sort { $a->[1] <=> $b->[1] } + map { + my $error = abs($ratio - eval($_)); + $error > $max_error ? () : [ $_, $error ]; + } @known_ratios; + $sorted[0][0]; +} + +sub ratio_name { + my ($horizontal, $vertical, $precision) = @_; + + if ($precision eq 'mm') { + nearest_ratio($horizontal / $vertical, 0.1); + } else { + my $error = 0.5; + my $ratio1 = nearest_ratio(($horizontal + $error) / ($vertical - $error), 0.2); + my $ratio2 = nearest_ratio(($horizontal - $error) / ($vertical + $error), 0.2); + $ratio1 && $ratio2 or return; + if ($ratio1 eq $ratio2) { + $ratio1; + } else { + my $ratio = nearest_ratio($horizontal / $vertical, 0.2); + join(' or ', $ratio, $ratio eq $ratio1 ? $ratio2 : $ratio1); + } + } +} + +sub to_MonitorsDB { + my ($edid) = @_; + + if (!$edid->{monitor_range}) { + print STDERR "No monitor range data in EDID.\n"; + return; + } + if (!$edid->{EISA_ID}) { + print STDERR "No monitor EISA_ID in EDID.\n"; + return; + } + + my $detailed_timings = $edid->{detailed_timings} || []; + my @preferred_resolutions = map { + join('x', $_->{horizontal_active}, $_->{vertical_active}); + } grep { !$_->{bad_ratio} } @$detailed_timings; + + (my $monitor_name = $edid->{monitor_name}) =~ s/;/,/g; + my ($raw_vendor, $raw_model) = $edid->{EISA_ID} =~ /(...)(.*)/; + my ($VendorName, $only_Model) = + $monitor_name =~ /(\S+)\s(.*)/ ? + ($1, $2) : + ($raw_vendor, $monitor_name || $raw_model); + + join('; ', + $VendorName, "$VendorName $only_Model", $edid->{EISA_ID}, + sprintf("%u-%u", $edid->{monitor_range}{horizontal_min}, $edid->{monitor_range}{horizontal_max}), + sprintf("%u-%u", $edid->{monitor_range}{vertical_min}, $edid->{monitor_range}{vertical_max}), + @$detailed_timings == 1 ? @preferred_resolutions : (), + ); +} + +sub print_edid { + my ($edid, $verbose) = @_; + + print "Name: $edid->{monitor_name}\n" if $edid->{monitor_name}; + print "EISA ID: $edid->{EISA_ID}\n" if $edid->{EISA_ID}; + print "EDID version: $edid->{edid_version}.$edid->{edid_revision}\n"; + # this is a number, despite the official name containing "flag": + print "EDID extension blocks: $edid->{extension_flag}\n"; + printf "Screen size: %.1f cm x %.1f cm (%3.2f inches%s)\n", + $edid->{max_size_horizontal}, + $edid->{max_size_vertical}, + $edid->{diagonal_size}, + $edid->{ratio_name} ? sprintf(", aspect ratio %s = %.2f", $edid->{ratio_name}, $edid->{ratio}) : + $edid->{ratio} ? sprintf(", aspect ratio %.2f", $edid->{ratio}) : ''; + + print "Gamma: ", $edid->{gamma} / 100 + 1, "\n"; + printf "%s signal\n", $edid->{video_input_definition}{digital} ? 'Digital' : 'Analog'; + + if ($verbose) { + foreach (@{$edid->{established_timings} || []}) { + print "Standard resolution: $_->{X}x$_->{Y} @ $_->{vfreq} Hz (established timing)\n" if !$_->{interlace}; + } + foreach (@{$edid->{standard_timings} || []}) { + print "Standard resolution: $_->{X}x$_->{Y} @ $_->{vfreq} Hz, ratio $_->{ratio}", + $edid->{ratio_name} && index($edid->{ratio_name}, $_->{ratio}) == -1 ? ' (!)' : '', + "\n"; + } + } + + if ($edid->{monitor_range}) { + printf "Max video bandwidth: %u MHz\n", $edid->{monitor_range}{pixel_clock_max} if $edid->{monitor_range}{pixel_clock_max}; + print "\n"; + printf "\tHorizSync %u-%u\n", $edid->{monitor_range}{horizontal_min}, $edid->{monitor_range}{horizontal_max}; + printf "\tVertRefresh %u-%u\n", $edid->{monitor_range}{vertical_min}, $edid->{monitor_range}{vertical_max}; + } + + foreach my $h (@{$edid->{detailed_timings}}) { + print "\n"; + print "\t", $h->{ModeLine_comment}, $h->{bad_ratio} ? ' (bad ratio)' : '', "\n"; + print "\tModeLine ", $h->{ModeLine}, "\n"; + } +} + +sub edid_from_lines { + my (@l) = @_; + my $edid_str = join('', map { /\s+([0-9a-f]{32})$/ && $1 } @l); + if (length($edid_str) % (2 * 128) != 0 || length($edid_str) == 0) { + return (); + } + pack("C*", map { hex($_) } $edid_str =~ /(..)/g); +} + +sub find_edid_in_string { + my ($input) = @_; + + my @edids; + while ($input =~ /(?:EDID_DATA|: EDID \(in hex\)):\n((.*\n){8})/g) { + push @edids, edid_from_lines(split '\n', $1); + } + if (!@edids) { + @edids = edid_from_lines(split '\n', $input); + } + @edids; +} + +sub sqr { $_[0] * $_[0] } +sub round { int($_[0] + 0.5) } +sub group_by2 { + my @l; + for (my $i = 0; $i < @_; $i += 2) { + push @l, [ $_[$i], $_[$i+1] ]; + } + @l; +} + +1; |