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#------------------------------------------------------------------------------ |
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# File: M2TS.pm |
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# |
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# Description: Read M2TS (AVCHD) meta information |
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# |
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# Revisions: 2009/07/03 - P. Harvey Created |
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# |
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# References: 1) http://neuron2.net/library/mpeg2/iso13818-1.pdf |
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# 2) http://www.blu-raydisc.com/Assets/Downloadablefile/BD-RE_Part3_V2.1_WhitePaper_080406-15271.pdf |
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# 3) http://www.videohelp.com/forum/archive/reading-avchd-playlist-files-bdmv-playlist-mpl-t358888.html |
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# 4) http://en.wikipedia.org/wiki/MPEG_transport_stream |
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# 5) http://www.dunod.com/documents/9782100493463/49346_DVB.pdf |
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# 6) http://trac.handbrake.fr/browser/trunk/libhb/stream.c |
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# 7) http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=04560141 |
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# 8) http://www.w6rz.net/xport.zip |
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# |
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# Notes: Variable names containing underlines are the same as in ref 1. |
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# |
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# Glossary: PES = Packetized Elementary Stream |
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# PAT = Program Association Table |
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# PMT = Program Map Table |
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# PCR = Program Clock Reference |
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# PID = Packet Identifier |
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# |
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# To Do: - parse PCR to obtain average bitrates? |
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#------------------------------------------------------------------------------ |
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package Image::ExifTool::M2TS; |
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3488
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use strict; |
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use vars qw($VERSION); |
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use Image::ExifTool qw(:DataAccess :Utils); |
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$VERSION = '1.21'; |
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# program map table "stream_type" lookup (ref 6/1) |
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my %streamType = ( |
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0x00 => 'Reserved', |
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0x01 => 'MPEG-1 Video', |
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0x02 => 'MPEG-2 Video', |
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0x03 => 'MPEG-1 Audio', |
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0x04 => 'MPEG-2 Audio', |
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0x05 => 'ISO 13818-1 private sections', |
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0x06 => 'ISO 13818-1 PES private data', |
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0x07 => 'ISO 13522 MHEG', |
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0x08 => 'ISO 13818-1 DSM-CC', |
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0x09 => 'ISO 13818-1 auxiliary', |
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0x0A => 'ISO 13818-6 multi-protocol encap', |
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0x0B => 'ISO 13818-6 DSM-CC U-N msgs', |
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0x0C => 'ISO 13818-6 stream descriptors', |
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0x0D => 'ISO 13818-6 sections', |
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0x0E => 'ISO 13818-1 auxiliary', |
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0x0F => 'MPEG-2 AAC Audio', |
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0x10 => 'MPEG-4 Video', |
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0x11 => 'MPEG-4 LATM AAC Audio', |
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0x12 => 'MPEG-4 generic', |
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0x13 => 'ISO 14496-1 SL-packetized', |
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0x14 => 'ISO 13818-6 Synchronized Download Protocol', |
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# 0x15-0x7F => 'ISO 13818-1 Reserved', |
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0x1b => 'H.264 (AVC) Video', |
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0x24 => 'H.265 (HEVC) Video', #PH |
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0x80 => 'DigiCipher II Video', |
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0x81 => 'A52/AC-3 Audio', |
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0x82 => 'HDMV DTS Audio', |
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0x83 => 'LPCM Audio', |
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0x84 => 'SDDS Audio', |
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0x85 => 'ATSC Program ID', |
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0x86 => 'DTS-HD Audio', |
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0x87 => 'E-AC-3 Audio', |
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0x8a => 'DTS Audio', |
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0x90 => 'PGS Audio', #https://www.avsforum.com/threads/bass-eq-for-filtered-movies.2995212/page-399 |
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0x91 => 'A52b/AC-3 Audio', |
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0x92 => 'DVD_SPU vls Subtitle', |
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0x94 => 'SDDS Audio', |
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0xa0 => 'MSCODEC Video', |
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0xea => 'Private ES (VC-1)', |
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# 0x80-0xFF => 'User Private', |
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); |
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# "table_id" values (ref 5) |
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my %tableID = ( |
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0x00 => 'Program Association', |
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0x01 => 'Conditional Access', |
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0x02 => 'Program Map', |
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0x03 => 'Transport Stream Description', |
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0x40 => 'Actual Network Information', |
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0x41 => 'Other Network Information', |
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0x42 => 'Actual Service Description', |
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0x46 => 'Other Service Description', |
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0x4a => 'Bouquet Association', |
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0x4e => 'Actual Event Information - Present/Following', |
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0x4f => 'Other Event Information - Present/Following', |
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0x50 => 'Actual Event Information - Schedule', #(also 0x51-0x5f) |
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0x60 => 'Other Event Information - Schedule', # (also 0x61-0x6f) |
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0x70 => 'Time/Date', |
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0x71 => 'Running Status', |
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0x72 => 'Stuffing', |
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0x73 => 'Time Offset', |
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0x7e => 'Discontinuity Information', |
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0x7f => 'Selection Information', |
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# 0x80-0xfe => 'User Defined', |
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); |
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104
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# PES stream ID's for which a syntax field does not exist |
105
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my %noSyntax = ( |
106
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0xbc => 1, # program_stream_map |
107
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0xbe => 1, # padding_stream |
108
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0xbf => 1, # private_stream_2 |
109
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0xf0 => 1, # ECM_stream |
110
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0xf1 => 1, # EMM_stream |
111
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0xf2 => 1, # DSMCC_stream |
112
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0xf8 => 1, # ITU-T Rec. H.222.1 type E stream |
113
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0xff => 1, # program_stream_directory |
114
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); |
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116
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my $knotsToKph = 1.852; # knots --> km/h |
117
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118
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# information extracted from the MPEG-2 transport stream |
119
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%Image::ExifTool::M2TS::Main = ( |
120
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GROUPS => { 2 => 'Video' }, |
121
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VARS => { NO_ID => 1 }, |
122
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NOTES => q{ |
123
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The MPEG-2 transport stream is used as a container for many different |
124
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audio/video formats (including AVCHD). This table lists information |
125
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extracted from M2TS files. |
126
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}, |
127
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VideoStreamType => { |
128
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PrintHex => 1, |
129
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PrintConv => \%streamType, |
130
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SeparateTable => 'StreamType', |
131
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}, |
132
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AudioStreamType => { |
133
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PrintHex => 1, |
134
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PrintConv => \%streamType, |
135
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SeparateTable => 'StreamType', |
136
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}, |
137
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Duration => { |
138
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Notes => q{ |
139
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the -fast option may be used to avoid scanning to the end of file to |
140
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calculate the Duration |
141
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}, |
142
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ValueConv => '$val / 27000000', # (clock is 27MHz) |
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PrintConv => 'ConvertDuration($val)', |
144
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}, |
145
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# the following tags are for documentation purposes only |
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_AC3 => { SubDirectory => { TagTable => 'Image::ExifTool::M2TS::AC3' } }, |
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_H264 => { SubDirectory => { TagTable => 'Image::ExifTool::H264::Main' } }, |
148
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); |
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150
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# information extracted from AC-3 audio streams |
151
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%Image::ExifTool::M2TS::AC3 = ( |
152
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GROUPS => { 1 => 'AC3', 2 => 'Audio' }, |
153
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VARS => { NO_ID => 1 }, |
154
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NOTES => 'Tags extracted from AC-3 audio streams.', |
155
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AudioSampleRate => { |
156
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PrintConv => { |
157
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0 => '48000', |
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1 => '44100', |
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2 => '32000', |
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}, |
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}, |
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AudioBitrate => { |
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PrintConvColumns => 2, |
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ValueConv => { |
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0 => 32000, |
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1 => 40000, |
167
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2 => 48000, |
168
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3 => 56000, |
169
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4 => 64000, |
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5 => 80000, |
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6 => 96000, |
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7 => 112000, |
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8 => 128000, |
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9 => 160000, |
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10 => 192000, |
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11 => 224000, |
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12 => 256000, |
178
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13 => 320000, |
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14 => 384000, |
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15 => 448000, |
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16 => 512000, |
182
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17 => 576000, |
183
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18 => 640000, |
184
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32 => '32000 max', |
185
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33 => '40000 max', |
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34 => '48000 max', |
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35 => '56000 max', |
188
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36 => '64000 max', |
189
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37 => '80000 max', |
190
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38 => '96000 max', |
191
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39 => '112000 max', |
192
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40 => '128000 max', |
193
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41 => '160000 max', |
194
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42 => '192000 max', |
195
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43 => '224000 max', |
196
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44 => '256000 max', |
197
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45 => '320000 max', |
198
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46 => '384000 max', |
199
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47 => '448000 max', |
200
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48 => '512000 max', |
201
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49 => '576000 max', |
202
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50 => '640000 max', |
203
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}, |
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PrintConv => 'ConvertBitrate($val)', |
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}, |
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SurroundMode => { |
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PrintConv => { |
208
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0 => 'Not indicated', |
209
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1 => 'Not Dolby surround', |
210
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2 => 'Dolby surround', |
211
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}, |
212
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}, |
213
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AudioChannels => { |
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PrintConvColumns => 2, |
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PrintConv => { |
216
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0 => '1 + 1', |
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1 => 1, |
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2 => 2, |
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3 => 3, |
220
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4 => '2/1', |
221
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5 => '3/1', |
222
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6 => '2/2', |
223
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7 => '3/2', |
224
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8 => 1, |
225
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9 => '2 max', |
226
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10 => '3 max', |
227
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11 => '4 max', |
228
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12 => '5 max', |
229
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13 => '6 max', |
230
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}, |
231
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|
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}, |
232
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|
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); |
233
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|
234
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#------------------------------------------------------------------------------ |
235
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# Extract information from AC-3 audio stream |
236
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# Inputs: 0) ExifTool ref, 1) data ref |
237
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# Reference: http://www.atsc.org/standards/a_52b.pdf |
238
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sub ParseAC3Audio($$) |
239
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|
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|
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{ |
240
|
1
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1
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0
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3
|
my ($et, $dataPt) = @_; |
241
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1
|
50
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|
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|
7
|
if ($$dataPt =~ /\x0b\x77..(.)/sg) { |
242
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1
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3
|
my $sampleRate = ord($1) >> 6; |
243
|
1
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|
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3
|
my $tagTablePtr = GetTagTable('Image::ExifTool::M2TS::AC3'); |
244
|
1
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|
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12
|
$et->HandleTag($tagTablePtr, AudioSampleRate => $sampleRate); |
245
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} |
246
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} |
247
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248
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|
#------------------------------------------------------------------------------ |
249
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# Extract information from AC-3 stream descriptor |
250
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# Inputs: 0) ExifTool ref, 1) data ref |
251
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# Reference: http://www.atsc.org/standards/a_52b.pdf |
252
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|
|
# Note: This information is duplicated in the Audio stream, but it |
253
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|
|
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# is somewhat easier to extract it from the descriptor instead |
254
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|
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sub ParseAC3Descriptor($$) |
255
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|
|
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|
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|
{ |
256
|
1
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|
|
1
|
0
|
3
|
my ($et, $dataPt) = @_; |
257
|
1
|
50
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|
|
|
3
|
return if length $$dataPt < 3; |
258
|
1
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|
|
|
|
3
|
my @v = unpack('C3', $$dataPt); |
259
|
1
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|
|
|
|
3
|
my $tagTablePtr = GetTagTable('Image::ExifTool::M2TS::AC3'); |
260
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|
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|
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|
|
# $et->HandleTag($tagTablePtr, 'AudioSampleRate', $v[0] >> 5); |
261
|
1
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6
|
$et->HandleTag($tagTablePtr, 'AudioBitrate', $v[1] >> 2); |
262
|
1
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|
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4
|
$et->HandleTag($tagTablePtr, 'SurroundMode', $v[1] & 0x03); |
263
|
1
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|
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|
4
|
$et->HandleTag($tagTablePtr, 'AudioChannels', ($v[2] >> 1) & 0x0f); |
264
|
|
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|
|
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|
# don't (yet) decode any more (language codes, etc) |
265
|
|
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|
|
|
} |
266
|
|
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|
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|
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|
267
|
|
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|
|
|
|
#------------------------------------------------------------------------------ |
268
|
|
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|
# Parse PID stream data |
269
|
|
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|
|
# Inputs: 0) ExifTool ref, 1) PID number, 2) PID type, 3) PID name, 4) data ref |
270
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|
# Returns: 0=stream parsed OK, |
271
|
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|
|
# 1=stream parsed but we want to parse more of these, |
272
|
|
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|
|
# -1=can't parse yet because we don't know the type |
273
|
|
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|
|
|
|
sub ParsePID($$$$$) |
274
|
|
|
|
|
|
|
{ |
275
|
2
|
|
|
2
|
0
|
5
|
my ($et, $pid, $type, $pidName, $dataPt) = @_; |
276
|
|
|
|
|
|
|
# can't parse until we know the type (Program Map Table may be later in the stream) |
277
|
2
|
50
|
|
|
|
5
|
return -1 unless defined $type; |
278
|
2
|
|
|
|
|
5
|
my $verbose = $et->Options('Verbose'); |
279
|
2
|
50
|
|
|
|
5
|
if ($verbose > 1) { |
280
|
0
|
|
|
|
|
0
|
my $out = $et->Options('TextOut'); |
281
|
0
|
|
|
|
|
0
|
printf $out "Parsing stream 0x%.4x (%s)\n", $pid, $pidName; |
282
|
0
|
|
|
|
|
0
|
$et->VerboseDump($dataPt); |
283
|
|
|
|
|
|
|
} |
284
|
2
|
|
|
|
|
3
|
my $more = 0; |
285
|
2
|
50
|
33
|
|
|
18
|
if ($type == 0x01 or $type == 0x02) { |
|
|
50
|
33
|
|
|
|
|
|
|
100
|
33
|
|
|
|
|
|
|
50
|
33
|
|
|
|
|
|
|
0
|
|
|
|
|
|
286
|
|
|
|
|
|
|
# MPEG-1/MPEG-2 Video |
287
|
0
|
|
|
|
|
0
|
require Image::ExifTool::MPEG; |
288
|
0
|
|
|
|
|
0
|
Image::ExifTool::MPEG::ParseMPEGAudioVideo($et, $dataPt); |
289
|
|
|
|
|
|
|
} elsif ($type == 0x03 or $type == 0x04) { |
290
|
|
|
|
|
|
|
# MPEG-1/MPEG-2 Audio |
291
|
0
|
|
|
|
|
0
|
require Image::ExifTool::MPEG; |
292
|
0
|
|
|
|
|
0
|
Image::ExifTool::MPEG::ParseMPEGAudio($et, $dataPt); |
293
|
|
|
|
|
|
|
} elsif ($type == 0x1b) { |
294
|
|
|
|
|
|
|
# H.264 Video |
295
|
1
|
|
|
|
|
477
|
require Image::ExifTool::H264; |
296
|
1
|
|
|
|
|
5
|
$more = Image::ExifTool::H264::ParseH264Video($et, $dataPt); |
297
|
|
|
|
|
|
|
# force parsing additional H264 frames with ExtractEmbedded option |
298
|
1
|
50
|
|
|
|
5
|
if ($$et{OPTIONS}{ExtractEmbedded}) { |
|
|
50
|
|
|
|
|
|
299
|
0
|
|
|
|
|
0
|
$more = 1; |
300
|
|
|
|
|
|
|
} elsif (not $$et{OPTIONS}{Validate}) { |
301
|
1
|
|
|
|
|
5
|
$et->WarnOnce('The ExtractEmbedded option may find more tags in the video data',3); |
302
|
|
|
|
|
|
|
} |
303
|
|
|
|
|
|
|
} elsif ($type == 0x81 or $type == 0x87 or $type == 0x91) { |
304
|
|
|
|
|
|
|
# AC-3 audio |
305
|
1
|
|
|
|
|
3
|
ParseAC3Audio($et, $dataPt); |
306
|
|
|
|
|
|
|
} elsif ($type < 0) { |
307
|
0
|
0
|
0
|
|
|
0
|
if ($$dataPt =~ /^(.{164})?(.{24})A[NS][EW]/s) { |
|
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
308
|
|
|
|
|
|
|
# (Blueskysea B4K, Novatek NT96670) |
309
|
|
|
|
|
|
|
# 0000: 01 00 ff 00 30 31 32 33 34 35 37 38 61 62 63 64 [....01234578abcd] |
310
|
|
|
|
|
|
|
# 0010: 65 66 67 0a 00 00 00 00 00 00 00 00 00 00 00 00 [efg.............] |
311
|
|
|
|
|
|
|
# 0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................] |
312
|
|
|
|
|
|
|
# 0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................] |
313
|
|
|
|
|
|
|
# 0040: 00 00 00 00 30 31 32 33 34 35 37 38 71 77 65 72 [....01234578qwer] |
314
|
|
|
|
|
|
|
# 0050: 74 79 75 69 6f 70 0a 00 00 00 00 00 00 00 00 00 [tyuiop..........] |
315
|
|
|
|
|
|
|
# 0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................] |
316
|
|
|
|
|
|
|
# 0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [................] |
317
|
|
|
|
|
|
|
# 0080: 00 00 00 00 63 38 61 61 32 35 63 66 34 35 65 65 [....c8aa25cf45ee] |
318
|
|
|
|
|
|
|
# 0090: 61 39 65 32 34 34 32 66 61 65 62 35 65 30 39 39 [a9e2442faeb5e099] |
319
|
|
|
|
|
|
|
# 00a0: 30 37 64 34 15 00 00 00 10 00 00 00 1b 00 00 00 [07d4............] |
320
|
|
|
|
|
|
|
# 00b0: 15 00 00 00 01 00 00 00 09 00 00 00 41 4e 57 00 [............ANW.] |
321
|
|
|
|
|
|
|
# 00c0: 82 9a 57 45 98 b2 00 46 66 66 e4 41 d7 e3 14 43 [..WE...Fff.A...C] |
322
|
|
|
|
|
|
|
# 00d0: 01 00 02 00 03 00 04 00 05 00 06 00 [............] |
323
|
|
|
|
|
|
|
# (Viofo A119V3) |
324
|
|
|
|
|
|
|
# 0000: 08 00 00 00 07 00 00 00 18 00 00 00 15 00 00 00 [................] |
325
|
|
|
|
|
|
|
# 0010: 03 00 00 00 0b 00 00 00 41 4e 45 00 01 f2 ac 45 [........ANE....E] |
326
|
|
|
|
|
|
|
# 0020: 2d 7f 6e 45 b8 1e 97 41 d7 23 46 43 00 00 00 00 [-.nE...A.#FC....] |
327
|
|
|
|
|
|
|
# pad with dummy header and parse with existing FreeGPS code (minimum 92 bytes) |
328
|
0
|
|
0
|
|
|
0
|
my $dat = ("\0" x 16) . substr($$dataPt, length($1 || '')) . ("\0" x 20); |
329
|
0
|
|
|
|
|
0
|
my $tbl = GetTagTable('Image::ExifTool::QuickTime::Stream'); |
330
|
0
|
|
|
|
|
0
|
Image::ExifTool::QuickTime::ProcessFreeGPS($et, { DataPt => \$dat }, $tbl); |
331
|
0
|
|
|
|
|
0
|
$more = 1; |
332
|
|
|
|
|
|
|
} elsif ($$dataPt =~ /^A([NS])([EW])\0/s) { |
333
|
|
|
|
|
|
|
# INNOVV TS video (same format is INNOVV MP4) |
334
|
0
|
|
|
|
|
0
|
SetByteOrder('II'); |
335
|
0
|
|
|
|
|
0
|
my $tagTbl = GetTagTable('Image::ExifTool::QuickTime::Stream'); |
336
|
0
|
|
|
|
|
0
|
while ($$dataPt =~ /(A[NS][EW]\0.{28})/g) { |
337
|
0
|
|
|
|
|
0
|
my $dat = $1; |
338
|
0
|
|
|
|
|
0
|
my $lat = abs(GetFloat(\$dat, 4)); # (abs just to be safe) |
339
|
0
|
|
|
|
|
0
|
my $lon = abs(GetFloat(\$dat, 8)); # (abs just to be safe) |
340
|
0
|
|
|
|
|
0
|
my $spd = GetFloat(\$dat, 12) * $knotsToKph; |
341
|
0
|
|
|
|
|
0
|
my $trk = GetFloat(\$dat, 16); |
342
|
0
|
|
|
|
|
0
|
my @acc = unpack('x20V3', $dat); |
343
|
0
|
0
|
|
|
|
0
|
map { $_ = $_ - 4294967296 if $_ >= 0x80000000 } @acc; |
|
0
|
|
|
|
|
0
|
|
344
|
0
|
|
|
|
|
0
|
Image::ExifTool::QuickTime::ConvertLatLon($lat, $lon); |
345
|
0
|
|
|
|
|
0
|
$$et{DOC_NUM} = ++$$et{DOC_COUNT}; |
346
|
0
|
0
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLatitude => abs($lat) * (substr($dat,1,1) eq 'S' ? -1 : 1)); |
347
|
0
|
0
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLongitude => abs($lon) * (substr($dat,2,1) eq 'W' ? -1 : 1)); |
348
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeed => $spd); |
349
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeedRef => 'K'); |
350
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrack => $trk); |
351
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrackRef => 'T'); |
352
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, Accelerometer => "@acc"); |
353
|
|
|
|
|
|
|
} |
354
|
0
|
|
|
|
|
0
|
SetByteOrder('MM'); |
355
|
0
|
|
|
|
|
0
|
$more = 1; |
356
|
|
|
|
|
|
|
} elsif ($$dataPt =~ /^\$(GPSINFO|GSNRINFO),/) { |
357
|
|
|
|
|
|
|
# $GPSINFO,0x0004,2021.08.09 13:27:36,2341.54561,12031.70135,8.0,51,153,0,0,\x0d |
358
|
|
|
|
|
|
|
# $GSNRINFO,0.01,0.04,0.25\0 |
359
|
0
|
|
|
|
|
0
|
$$dataPt =~ tr/\x0d/\x0a/; |
360
|
0
|
|
|
|
|
0
|
$$dataPt =~ tr/\0//d; |
361
|
0
|
|
|
|
|
0
|
my $tagTbl = GetTagTable('Image::ExifTool::QuickTime::Stream'); |
362
|
0
|
|
|
|
|
0
|
my @lines = split /\x0a/, $$dataPt; |
363
|
0
|
|
|
|
|
0
|
my ($line, $lastTime); |
364
|
0
|
|
|
|
|
0
|
foreach $line (@lines) { |
365
|
0
|
0
|
|
|
|
0
|
if ($line =~ /^\$GPSINFO/) { |
|
|
0
|
|
|
|
|
|
366
|
0
|
|
|
|
|
0
|
my @a = split /,/, $lines[0]; |
367
|
0
|
0
|
|
|
|
0
|
next unless @a > 7; |
368
|
|
|
|
|
|
|
# ignore duplicate fixes |
369
|
0
|
0
|
0
|
|
|
0
|
next if $lastTime and $a[2] eq $lastTime; |
370
|
0
|
|
|
|
|
0
|
$lastTime = $a[2]; |
371
|
0
|
|
|
|
|
0
|
$$et{DOC_NUM} = ++$$et{DOC_COUNT}; |
372
|
0
|
|
|
|
|
0
|
$a[2] =~ tr/./:/; |
373
|
|
|
|
|
|
|
# (untested, and probably doesn't work for S/W hemispheres) |
374
|
0
|
|
|
|
|
0
|
my ($lat, $lon) = @a[3,4]; |
375
|
0
|
|
|
|
|
0
|
Image::ExifTool::QuickTime::ConvertLatLon($lat, $lon); |
376
|
|
|
|
|
|
|
# $a[0] - flags? values: '0x0001','0x0004','0x0008','0x0010' |
377
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSDateTime => $a[2]); |
378
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLatitude => $lat); |
379
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLongitude => $lon); |
380
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeed => $a[5]); |
381
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeedRef => 'K'); |
382
|
|
|
|
|
|
|
# $a[6] - values: 48-60 |
383
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrack => $a[7]); |
384
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrackRef => 'T'); |
385
|
|
|
|
|
|
|
# #a[8,9] - always 0 |
386
|
|
|
|
|
|
|
} elsif ($line =~ /^\$GSNRINFO/) { |
387
|
0
|
|
|
|
|
0
|
my @a = split /,/, $line; |
388
|
0
|
|
|
|
|
0
|
shift @a; |
389
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, Accelerometer => "@a"); |
390
|
|
|
|
|
|
|
} |
391
|
|
|
|
|
|
|
} |
392
|
0
|
|
|
|
|
0
|
$more = 1; |
393
|
|
|
|
|
|
|
} elsif ($$dataPt =~ /^.{44}A\0{3}.{4}([NS])\0{3}.{4}([EW])\0{3}/s and length($$dataPt) >= 84) { |
394
|
|
|
|
|
|
|
#forum11320 |
395
|
0
|
|
|
|
|
0
|
SetByteOrder('II'); |
396
|
0
|
|
|
|
|
0
|
my $tagTbl = GetTagTable('Image::ExifTool::QuickTime::Stream'); |
397
|
0
|
|
|
|
|
0
|
my $lat = abs(GetFloat($dataPt, 48)); # (abs just to be safe) |
398
|
0
|
|
|
|
|
0
|
my $lon = abs(GetFloat($dataPt, 56)); # (abs just to be safe) |
399
|
0
|
|
|
|
|
0
|
my $spd = GetFloat($dataPt, 64); |
400
|
0
|
|
|
|
|
0
|
my $trk = GetFloat($dataPt, 68); |
401
|
0
|
|
|
|
|
0
|
$et->WarnOnce('GPSLatitude/Longitude encryption is not yet known, so these will be wrong'); |
402
|
0
|
|
|
|
|
0
|
$$et{DOC_NUM} = ++$$et{DOC_COUNT}; |
403
|
0
|
|
|
|
|
0
|
my @date = unpack('x32V3x28V3', $$dataPt); |
404
|
0
|
|
|
|
|
0
|
$date[3] += 2000; |
405
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSDateTime => sprintf('%.4d:%.2d:%.2d %.2d:%.2d:%.2d', @date[3..5,0..2])); |
406
|
0
|
0
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLatitude => abs($lat) * ($1 eq 'S' ? -1 : 1)); |
407
|
0
|
0
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSLongitude => abs($lon) * ($2 eq 'W' ? -1 : 1)); |
408
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeed => $spd); |
409
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSSpeedRef => 'K'); |
410
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrack => $trk); |
411
|
0
|
|
|
|
|
0
|
$et->HandleTag($tagTbl, GPSTrackRef => 'T'); |
412
|
0
|
|
|
|
|
0
|
SetByteOrder('MM'); |
413
|
0
|
|
|
|
|
0
|
$more = 1; |
414
|
|
|
|
|
|
|
} |
415
|
0
|
|
|
|
|
0
|
delete $$et{DOC_NUM}; |
416
|
|
|
|
|
|
|
} |
417
|
2
|
|
|
|
|
4
|
return $more; |
418
|
|
|
|
|
|
|
} |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
#------------------------------------------------------------------------------ |
421
|
|
|
|
|
|
|
# Extract information from a M2TS file |
422
|
|
|
|
|
|
|
# Inputs: 0) ExifTool object reference, 1) DirInfo reference |
423
|
|
|
|
|
|
|
# Returns: 1 on success, 0 if this wasn't a valid M2TS file |
424
|
|
|
|
|
|
|
sub ProcessM2TS($$) |
425
|
|
|
|
|
|
|
{ |
426
|
1
|
|
|
1
|
0
|
3
|
my ($et, $dirInfo) = @_; |
427
|
1
|
|
|
|
|
2
|
my $raf = $$dirInfo{RAF}; |
428
|
1
|
|
|
|
|
5
|
my ($buff, $pLen, $upkPrefix, $j, $fileType, $eof); |
429
|
1
|
|
|
|
|
0
|
my (%pmt, %pidType, %data, %sectLen); |
430
|
1
|
|
|
|
|
0
|
my ($startTime, $endTime, $fwdTime, $backScan, $maxBack); |
431
|
1
|
|
|
|
|
3
|
my $verbose = $et->Options('Verbose'); |
432
|
1
|
|
|
|
|
5
|
my $out = $et->Options('TextOut'); |
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
# read first packet |
435
|
1
|
50
|
|
|
|
4
|
return 0 unless $raf->Read($buff, 8) == 8; |
436
|
|
|
|
|
|
|
# test for magic number (sync byte is the only thing we can safely check) |
437
|
1
|
50
|
|
|
|
7
|
return 0 unless $buff =~ /^(....)?\x47/s; |
438
|
1
|
50
|
|
|
|
5
|
unless ($1) { |
439
|
0
|
|
|
|
|
0
|
$pLen = 188; # no timecode |
440
|
0
|
|
|
|
|
0
|
$fileType = 'M2T'; # (just as a way to tell there is no timecode) |
441
|
0
|
|
|
|
|
0
|
$upkPrefix = 'N'; |
442
|
|
|
|
|
|
|
} else { |
443
|
1
|
|
|
|
|
2
|
$pLen = 192; # 188-byte transport packet + leading 4-byte timecode (ref 4) |
444
|
1
|
|
|
|
|
2
|
$upkPrefix = 'x4N'; |
445
|
|
|
|
|
|
|
} |
446
|
1
|
|
|
|
|
2
|
my $prePos = $pLen - 188; # byte position of packet prefix |
447
|
1
|
|
|
|
|
2
|
my $readSize = 64 * $pLen; # size of our read buffer |
448
|
1
|
|
|
|
|
4
|
$raf->Seek(0,0); # rewind to start |
449
|
1
|
50
|
|
|
|
3
|
$raf->Read($buff, $readSize) >= $pLen * 4 or return 0; # require at least 4 packets |
450
|
|
|
|
|
|
|
# validate the sync byte in the next 3 packets |
451
|
1
|
|
|
|
|
5
|
for ($j=1; $j<4; ++$j) { |
452
|
3
|
50
|
|
|
|
9
|
return 0 unless substr($buff, $prePos + $pLen * $j, 1) eq 'G'; # (0x47) |
453
|
|
|
|
|
|
|
} |
454
|
1
|
|
|
|
|
6
|
$et->SetFileType($fileType); |
455
|
1
|
|
|
|
|
4
|
SetByteOrder('MM'); |
456
|
1
|
|
|
|
|
4
|
my $tagTablePtr = GetTagTable('Image::ExifTool::M2TS::Main'); |
457
|
|
|
|
|
|
|
|
458
|
|
|
|
|
|
|
# PID lookup strings (will add to this with entries from program map table) |
459
|
1
|
|
|
|
|
6
|
my %pidName = ( |
460
|
|
|
|
|
|
|
0 => 'Program Association Table', |
461
|
|
|
|
|
|
|
1 => 'Conditional Access Table', |
462
|
|
|
|
|
|
|
2 => 'Transport Stream Description Table', |
463
|
|
|
|
|
|
|
0x1fff => 'Null Packet', |
464
|
|
|
|
|
|
|
); |
465
|
1
|
|
|
|
|
4
|
my %didPID = ( 1 => 0, 2 => 0, 0x1fff => 0 ); |
466
|
1
|
|
|
|
|
2
|
my %needPID = ( 0 => 1 ); # lookup for stream PID's that we still need to parse |
467
|
|
|
|
|
|
|
# PID's that may contain GPS info |
468
|
1
|
|
|
|
|
3
|
my %gpsPID = ( |
469
|
|
|
|
|
|
|
0x0300 => 1, # Novatek INNOVV |
470
|
|
|
|
|
|
|
0x01e4 => 1, # vsys a6l dashcam |
471
|
|
|
|
|
|
|
); |
472
|
1
|
|
|
|
|
2
|
my $pEnd = 0; |
473
|
|
|
|
|
|
|
|
474
|
|
|
|
|
|
|
# scan entire file for GPS programs if ExtractEmbedded option is 3 or higher |
475
|
|
|
|
|
|
|
# (some dashcams write these programs but don't include it in the PMT) |
476
|
1
|
50
|
50
|
|
|
3
|
if (($et->Options('ExtractEmbedded') || 0) > 2) { |
477
|
0
|
|
|
|
|
0
|
foreach (keys %gpsPID) { |
478
|
0
|
|
|
|
|
0
|
$needPID{$_} = 1; |
479
|
0
|
|
|
|
|
0
|
$pidType{$_} = -1; |
480
|
0
|
|
|
|
|
0
|
$pidName{$_} ='unregistered dashcam GPS'; |
481
|
|
|
|
|
|
|
} |
482
|
|
|
|
|
|
|
} |
483
|
|
|
|
|
|
|
|
484
|
|
|
|
|
|
|
# parse packets from MPEG-2 Transport Stream |
485
|
1
|
|
|
|
|
2
|
for (;;) { |
486
|
|
|
|
|
|
|
|
487
|
8
|
50
|
|
|
|
14
|
unless (%needPID) { |
488
|
0
|
0
|
|
|
|
0
|
last unless defined $startTime; |
489
|
|
|
|
|
|
|
# reconfigure to seek backwards for last PCR |
490
|
0
|
0
|
|
|
|
0
|
unless (defined $backScan) { |
491
|
0
|
|
|
|
|
0
|
my $saveTime = $endTime; |
492
|
0
|
|
|
|
|
0
|
undef $endTime; |
493
|
0
|
0
|
|
|
|
0
|
last if $et->Options('FastScan'); |
494
|
0
|
0
|
|
|
|
0
|
$verbose and print $out "[Starting backscan for last PCR]\n"; |
495
|
|
|
|
|
|
|
# remember how far we got when reading forward through the file |
496
|
0
|
|
|
|
|
0
|
my $fwdPos = $raf->Tell() - length($buff) + $pEnd; |
497
|
|
|
|
|
|
|
# determine the position of the last packet relative to the EOF |
498
|
0
|
0
|
|
|
|
0
|
$raf->Seek(0, 2) or last; |
499
|
0
|
|
|
|
|
0
|
my $fsize = $raf->Tell(); |
500
|
0
|
|
|
|
|
0
|
$backScan = int($fsize / $pLen) * $pLen - $fsize; |
501
|
|
|
|
|
|
|
# set limit on how far back we will go |
502
|
0
|
|
|
|
|
0
|
$maxBack = $fwdPos - $fsize; |
503
|
|
|
|
|
|
|
# scan back a maximum of 512k (have seen last PCR at -276k) |
504
|
0
|
|
|
|
|
0
|
my $nMax = int(512000 / $pLen); # max packets to backscan |
505
|
0
|
0
|
|
|
|
0
|
if ($nMax < int(-$maxBack / $pLen)) { |
506
|
0
|
|
|
|
|
0
|
$maxBack = $backScan - $nMax * $pLen; |
507
|
|
|
|
|
|
|
} else { |
508
|
|
|
|
|
|
|
# use this time if none found in all remaining packets |
509
|
0
|
|
|
|
|
0
|
$fwdTime = $saveTime; |
510
|
|
|
|
|
|
|
} |
511
|
0
|
|
|
|
|
0
|
$pEnd = 0; |
512
|
|
|
|
|
|
|
} |
513
|
|
|
|
|
|
|
} |
514
|
8
|
|
|
|
|
10
|
my $pos; |
515
|
|
|
|
|
|
|
# read more if necessary |
516
|
8
|
50
|
|
|
|
11
|
if (defined $backScan) { |
517
|
0
|
0
|
|
|
|
0
|
last if defined $endTime; |
518
|
0
|
|
|
|
|
0
|
$pos = $pEnd = $pEnd - 2 * $pLen; # step back to previous packet |
519
|
0
|
0
|
|
|
|
0
|
if ($pos < 0) { |
520
|
|
|
|
|
|
|
# read another buffer from end of file |
521
|
0
|
0
|
|
|
|
0
|
last if $backScan <= $maxBack; |
522
|
0
|
|
|
|
|
0
|
my $buffLen = $backScan - $maxBack; |
523
|
0
|
0
|
|
|
|
0
|
$buffLen = $readSize if $buffLen > $readSize; |
524
|
0
|
|
|
|
|
0
|
$backScan -= $buffLen; |
525
|
0
|
0
|
|
|
|
0
|
$raf->Seek($backScan, 2) or last; |
526
|
0
|
0
|
|
|
|
0
|
$raf->Read($buff, $buffLen) == $buffLen or last; |
527
|
0
|
|
|
|
|
0
|
$pos = $pEnd = $buffLen - $pLen; |
528
|
|
|
|
|
|
|
} |
529
|
|
|
|
|
|
|
} else { |
530
|
8
|
|
|
|
|
11
|
$pos = $pEnd; |
531
|
8
|
100
|
|
|
|
15
|
if ($pos + $pLen > length $buff) { |
532
|
1
|
50
|
|
|
|
4
|
$raf->Read($buff, $readSize) >= $pLen or $eof = 1, last; |
533
|
0
|
|
|
|
|
0
|
$pos = $pEnd = 0; |
534
|
|
|
|
|
|
|
} |
535
|
|
|
|
|
|
|
} |
536
|
7
|
|
|
|
|
9
|
$pEnd += $pLen; |
537
|
|
|
|
|
|
|
# decode the packet prefix |
538
|
7
|
|
|
|
|
6
|
$pos += $prePos; |
539
|
7
|
|
|
|
|
16
|
my $prefix = unpack("x${pos}N", $buff); # (use unpack instead of Get32u for speed) |
540
|
|
|
|
|
|
|
# validate sync byte |
541
|
7
|
50
|
|
|
|
16
|
unless (($prefix & 0xff000000) == 0x47000000) { |
542
|
0
|
0
|
|
|
|
0
|
$et->Warn('M2TS synchronization error') unless defined $backScan; |
543
|
0
|
|
|
|
|
0
|
last; |
544
|
|
|
|
|
|
|
} |
545
|
|
|
|
|
|
|
# my $transport_error_indicator = $prefix & 0x00800000; |
546
|
7
|
|
|
|
|
9
|
my $payload_unit_start_indicator = $prefix & 0x00400000; |
547
|
|
|
|
|
|
|
# my $transport_priority = $prefix & 0x00200000; |
548
|
7
|
|
|
|
|
8
|
my $pid =($prefix & 0x001fff00) >> 8; # packet ID |
549
|
|
|
|
|
|
|
# my $transport_scrambling_control = $prefix & 0x000000c0; |
550
|
7
|
|
|
|
|
9
|
my $adaptation_field_exists = $prefix & 0x00000020; |
551
|
7
|
|
|
|
|
8
|
my $payload_data_exists = $prefix & 0x00000010; |
552
|
|
|
|
|
|
|
# my $continuity_counter = $prefix & 0x0000000f; |
553
|
7
|
50
|
|
|
|
13
|
if ($verbose > 1) { |
554
|
0
|
|
|
|
|
0
|
my $i = ($raf->Tell() - length($buff) + $pEnd) / $pLen - 1; |
555
|
0
|
|
|
|
|
0
|
print $out "Transport packet $i:\n"; |
556
|
0
|
|
|
|
|
0
|
$et->VerboseDump(\$buff, Len => $pLen, Addr => $i * $pLen, Start => $pos - $prePos); |
557
|
0
|
0
|
|
|
|
0
|
my $str = $pidName{$pid} ? " ($pidName{$pid})" : ' '; |
558
|
0
|
0
|
|
|
|
0
|
printf $out " Timecode: 0x%.4x\n", Get32u(\$buff, $pos - $prePos) if $pLen == 192; |
559
|
0
|
|
|
|
|
0
|
printf $out " Packet ID: 0x%.4x$str\n", $pid; |
560
|
0
|
0
|
|
|
|
0
|
printf $out " Start Flag: %s\n", $payload_unit_start_indicator ? 'Yes' : 'No'; |
561
|
|
|
|
|
|
|
} |
562
|
|
|
|
|
|
|
|
563
|
7
|
|
|
|
|
10
|
$pos += 4; |
564
|
|
|
|
|
|
|
# handle adaptation field |
565
|
7
|
100
|
|
|
|
10
|
if ($adaptation_field_exists) { |
566
|
1
|
|
|
|
|
3
|
my $len = Get8u(\$buff, $pos++); |
567
|
1
|
50
|
|
|
|
3
|
$pos + $len > $pEnd and $et->Warn('Invalid adaptation field length'), last; |
568
|
|
|
|
|
|
|
# read PCR value for calculation of Duration |
569
|
1
|
50
|
|
|
|
3
|
if ($len > 6) { |
570
|
1
|
|
|
|
|
4
|
my $flags = Get8u(\$buff, $pos); |
571
|
1
|
50
|
|
|
|
3
|
if ($flags & 0x10) { # PCR_flag |
572
|
|
|
|
|
|
|
# combine 33-bit program_clock_reference_base and 9-bit extension |
573
|
1
|
|
|
|
|
5
|
my $pcrBase = Get32u(\$buff, $pos + 1); |
574
|
1
|
|
|
|
|
4
|
my $pcrExt = Get16u(\$buff, $pos + 5); |
575
|
|
|
|
|
|
|
# ignore separate programs (PID's) and store just the |
576
|
|
|
|
|
|
|
# first and last timestamps found in the file (is this OK?) |
577
|
1
|
|
|
|
|
3
|
$endTime = 300 * (2 * $pcrBase + ($pcrExt >> 15)) + ($pcrExt & 0x01ff); |
578
|
1
|
50
|
|
|
|
4
|
$startTime = $endTime unless defined $startTime; |
579
|
|
|
|
|
|
|
} |
580
|
|
|
|
|
|
|
} |
581
|
1
|
|
|
|
|
1
|
$pos += $len; |
582
|
|
|
|
|
|
|
} |
583
|
|
|
|
|
|
|
|
584
|
|
|
|
|
|
|
# all done with this packet unless it carries a payload |
585
|
|
|
|
|
|
|
# or if we are just looking for the last timestamp |
586
|
7
|
100
|
66
|
|
|
25
|
next unless $payload_data_exists and not defined $backScan; |
587
|
|
|
|
|
|
|
|
588
|
|
|
|
|
|
|
# decode payload data |
589
|
6
|
100
|
100
|
|
|
46
|
if ($pid == 0 or # program association table |
|
|
50
|
|
|
|
|
|
590
|
|
|
|
|
|
|
defined $pmt{$pid}) # program map table(s) |
591
|
|
|
|
|
|
|
{ |
592
|
|
|
|
|
|
|
# must interpret pointer field if payload_unit_start_indicator is set |
593
|
3
|
|
|
|
|
15
|
my $buf2; |
594
|
3
|
50
|
|
|
|
6
|
if ($payload_unit_start_indicator) { |
595
|
|
|
|
|
|
|
# skip to start of section |
596
|
3
|
|
|
|
|
9
|
my $pointer_field = Get8u(\$buff, $pos); |
597
|
3
|
|
|
|
|
4
|
$pos += 1 + $pointer_field; |
598
|
3
|
50
|
|
|
|
8
|
$pos >= $pEnd and $et->Warn('Bad pointer field'), last; |
599
|
3
|
|
|
|
|
6
|
$buf2 = substr($buff, $pEnd-$pLen, $pLen); |
600
|
3
|
|
|
|
|
4
|
$pos -= $pEnd - $pLen; |
601
|
|
|
|
|
|
|
} else { |
602
|
|
|
|
|
|
|
# not the start of a section |
603
|
0
|
0
|
|
|
|
0
|
next unless $sectLen{$pid}; |
604
|
0
|
|
|
|
|
0
|
my $more = $sectLen{$pid} - length($data{$pid}); |
605
|
0
|
|
|
|
|
0
|
my $size = $pLen - $pos; |
606
|
0
|
0
|
|
|
|
0
|
$size = $more if $size > $more; |
607
|
0
|
|
|
|
|
0
|
$data{$pid} .= substr($buff, $pos, $size); |
608
|
0
|
0
|
|
|
|
0
|
next unless $size == $more; |
609
|
|
|
|
|
|
|
# we have the complete section now, so put into $buf2 for parsing |
610
|
0
|
|
|
|
|
0
|
$buf2 = $data{$pid}; |
611
|
0
|
|
|
|
|
0
|
$pos = 0; |
612
|
0
|
|
|
|
|
0
|
delete $data{$pid}; |
613
|
0
|
|
|
|
|
0
|
delete $sectLen{$pid}; |
614
|
|
|
|
|
|
|
} |
615
|
3
|
|
|
|
|
4
|
my $slen = length($buf2); # section length |
616
|
3
|
50
|
|
|
|
8
|
$pos + 8 > $slen and $et->Warn('Truncated payload'), last; |
617
|
|
|
|
|
|
|
# validate table ID |
618
|
3
|
|
|
|
|
7
|
my $table_id = Get8u(\$buf2, $pos); |
619
|
3
|
|
33
|
|
|
16
|
my $name = ($tableID{$table_id} || sprintf('Unknown (0x%x)',$table_id)) . ' Table'; |
620
|
3
|
100
|
|
|
|
8
|
my $expectedID = $pid ? 0x02 : 0x00; |
621
|
3
|
100
|
|
|
|
6
|
unless ($table_id == $expectedID) { |
622
|
1
|
50
|
|
|
|
3
|
$verbose > 1 and print $out " (skipping $name)\n"; |
623
|
1
|
|
|
|
|
2
|
delete $needPID{$pid}; |
624
|
1
|
|
|
|
|
2
|
$didPID{$pid} = 1; |
625
|
1
|
|
|
|
|
2
|
next; |
626
|
|
|
|
|
|
|
} |
627
|
|
|
|
|
|
|
# validate section syntax indicator for parsed tables (PAT, PMT) |
628
|
2
|
|
|
|
|
6
|
my $section_syntax_indicator = Get8u(\$buf2, $pos + 1) & 0xc0; |
629
|
2
|
50
|
|
|
|
6
|
$section_syntax_indicator == 0x80 or $et->Warn("Bad $name"), last; |
630
|
2
|
|
|
|
|
5
|
my $section_length = Get16u(\$buf2, $pos + 1) & 0x0fff; |
631
|
2
|
50
|
|
|
|
5
|
$section_length > 1021 and $et->Warn("Invalid $name length"), last; |
632
|
2
|
50
|
|
|
|
7
|
if ($slen < $section_length + 3) { # (3 bytes for table_id + section_length) |
633
|
|
|
|
|
|
|
# must wait until we have the full section |
634
|
0
|
|
|
|
|
0
|
$data{$pid} = substr($buf2, $pos); |
635
|
0
|
|
|
|
|
0
|
$sectLen{$pid} = $section_length + 3; |
636
|
0
|
|
|
|
|
0
|
next; |
637
|
|
|
|
|
|
|
} |
638
|
2
|
|
|
|
|
3
|
my $program_number = Get16u(\$buf2, $pos + 3); |
639
|
2
|
|
|
|
|
6
|
my $section_number = Get8u(\$buf2, $pos + 6); |
640
|
2
|
|
|
|
|
4
|
my $last_section_number = Get8u(\$buf2, $pos + 7); |
641
|
2
|
50
|
|
|
|
7
|
if ($verbose > 1) { |
642
|
0
|
|
|
|
|
0
|
print $out " $name length: $section_length\n"; |
643
|
0
|
0
|
|
|
|
0
|
print $out " Program No: $program_number\n" if $pid; |
644
|
0
|
0
|
|
|
|
0
|
printf $out " Stream ID: 0x%x\n", $program_number if not $pid; |
645
|
0
|
|
|
|
|
0
|
print $out " Section No: $section_number\n"; |
646
|
0
|
|
|
|
|
0
|
print $out " Last Sect.: $last_section_number\n"; |
647
|
|
|
|
|
|
|
} |
648
|
2
|
|
|
|
|
4
|
my $end = $pos + $section_length + 3 - 4; # (don't read 4-byte CRC) |
649
|
2
|
|
|
|
|
3
|
$pos += 8; |
650
|
2
|
100
|
|
|
|
5
|
if ($pid == 0) { |
651
|
|
|
|
|
|
|
# decode PAT (Program Association Table) |
652
|
1
|
|
|
|
|
3
|
while ($pos <= $end - 4) { |
653
|
2
|
|
|
|
|
5
|
my $program_number = Get16u(\$buf2, $pos); |
654
|
2
|
|
|
|
|
3
|
my $program_map_PID = Get16u(\$buf2, $pos + 2) & 0x1fff; |
655
|
2
|
|
|
|
|
5
|
$pmt{$program_map_PID} = $program_number; # save our PMT PID's |
656
|
2
|
|
|
|
|
15
|
my $str = "Program $program_number Map"; |
657
|
2
|
|
|
|
|
3
|
$pidName{$program_map_PID} = $str; |
658
|
2
|
50
|
|
|
|
6
|
$needPID{$program_map_PID} = 1 unless $didPID{$program_map_PID}; |
659
|
2
|
50
|
|
|
|
4
|
$verbose and printf $out " PID(0x%.4x) --> $str\n", $program_map_PID; |
660
|
2
|
|
|
|
|
6
|
$pos += 4; |
661
|
|
|
|
|
|
|
} |
662
|
|
|
|
|
|
|
} else { |
663
|
|
|
|
|
|
|
# decode PMT (Program Map Table) |
664
|
1
|
50
|
|
|
|
3
|
$pos + 4 > $slen and $et->Warn('Truncated PMT'), last; |
665
|
1
|
|
|
|
|
3
|
my $pcr_pid = Get16u(\$buf2, $pos) & 0x1fff; |
666
|
1
|
|
|
|
|
4
|
my $program_info_length = Get16u(\$buf2, $pos + 2) & 0x0fff; |
667
|
1
|
|
|
|
|
3
|
my $str = "Program $program_number Clock Reference"; |
668
|
1
|
|
|
|
|
3
|
$pidName{$pcr_pid} = $str; |
669
|
1
|
50
|
|
|
|
2
|
$verbose and printf $out " PID(0x%.4x) --> $str\n", $pcr_pid; |
670
|
1
|
|
|
|
|
3
|
$pos += 4; |
671
|
1
|
50
|
|
|
|
3
|
$pos + $program_info_length > $slen and $et->Warn('Truncated program info'), last; |
672
|
|
|
|
|
|
|
# dump program information descriptors if verbose |
673
|
1
|
50
|
|
|
|
3
|
if ($verbose > 1) { for ($j=0; $j<$program_info_length-2; ) { |
|
0
|
|
|
|
|
0
|
|
674
|
0
|
|
|
|
|
0
|
my $descriptor_tag = Get8u(\$buf2, $pos + $j); |
675
|
0
|
|
|
|
|
0
|
my $descriptor_length = Get8u(\$buf2, $pos + $j + 1); |
676
|
0
|
|
|
|
|
0
|
$j += 2; |
677
|
0
|
0
|
|
|
|
0
|
last if $j + $descriptor_length > $program_info_length; |
678
|
0
|
|
|
|
|
0
|
my $desc = substr($buf2, $pos+$j, $descriptor_length); |
679
|
0
|
|
|
|
|
0
|
$j += $descriptor_length; |
680
|
0
|
|
|
|
|
0
|
$desc =~ s/([\x00-\x1f\x80-\xff])/sprintf("\\x%.2x",ord $1)/eg; |
|
0
|
|
|
|
|
0
|
|
681
|
0
|
|
|
|
|
0
|
printf $out " Program Descriptor: Type=0x%.2x \"$desc\"\n", $descriptor_tag; |
682
|
|
|
|
|
|
|
}} |
683
|
1
|
|
|
|
|
2
|
$pos += $program_info_length; # skip descriptors (for now) |
684
|
1
|
|
|
|
|
10
|
while ($pos <= $end - 5) { |
685
|
2
|
|
|
|
|
6
|
my $stream_type = Get8u(\$buf2, $pos); |
686
|
2
|
|
|
|
|
5
|
my $elementary_pid = Get16u(\$buf2, $pos + 1) & 0x1fff; |
687
|
2
|
|
|
|
|
7
|
my $es_info_length = Get16u(\$buf2, $pos + 3) & 0x0fff; |
688
|
2
|
|
|
|
|
5
|
my $str = $streamType{$stream_type}; |
689
|
2
|
0
|
|
|
|
11
|
$str or $str = ($stream_type < 0x7f ? 'Reserved' : 'Private'); |
|
|
50
|
|
|
|
|
|
690
|
2
|
|
|
|
|
11
|
$str = sprintf('%s (0x%.2x)', $str, $stream_type); |
691
|
2
|
|
|
|
|
5
|
$str = "Program $program_number $str"; |
692
|
2
|
50
|
|
|
|
5
|
$verbose and printf $out " PID(0x%.4x) --> $str\n", $elementary_pid; |
693
|
2
|
50
|
|
|
|
17
|
if ($str =~ /(Audio|Video)/) { |
694
|
2
|
50
|
|
|
|
12
|
unless ($pidName{$elementary_pid}) { |
695
|
2
|
|
|
|
|
11
|
$et->HandleTag($tagTablePtr, $1 . 'StreamType', $stream_type) |
696
|
|
|
|
|
|
|
} |
697
|
|
|
|
|
|
|
# we want to parse all Audio and Video streams |
698
|
2
|
50
|
|
|
|
5
|
$needPID{$elementary_pid} = 1 unless $didPID{$elementary_pid}; |
699
|
|
|
|
|
|
|
} |
700
|
|
|
|
|
|
|
# save PID type and name string |
701
|
2
|
|
|
|
|
5
|
$pidName{$elementary_pid} = $str; |
702
|
2
|
|
|
|
|
4
|
$pidType{$elementary_pid} = $stream_type; |
703
|
2
|
|
|
|
|
3
|
$pos += 5; |
704
|
2
|
50
|
|
|
|
5
|
$pos + $es_info_length > $slen and $et->Warn('Truncated ES info'), $pos = $end, last; |
705
|
|
|
|
|
|
|
# parse elementary stream descriptors |
706
|
2
|
|
|
|
|
6
|
for ($j=0; $j<$es_info_length-2; ) { |
707
|
3
|
|
|
|
|
8
|
my $descriptor_tag = Get8u(\$buf2, $pos + $j); |
708
|
3
|
|
|
|
|
739
|
my $descriptor_length = Get8u(\$buf2, $pos + $j + 1); |
709
|
3
|
|
|
|
|
5
|
$j += 2; |
710
|
3
|
50
|
|
|
|
7
|
last if $j + $descriptor_length > $es_info_length; |
711
|
3
|
|
|
|
|
7
|
my $desc = substr($buf2, $pos+$j, $descriptor_length); |
712
|
3
|
|
|
|
|
3
|
$j += $descriptor_length; |
713
|
3
|
50
|
|
|
|
6
|
if ($verbose > 1) { |
714
|
0
|
|
|
|
|
0
|
my $dstr = $desc; |
715
|
0
|
|
|
|
|
0
|
$dstr =~ s/([\x00-\x1f\x80-\xff])/sprintf("\\x%.2x",ord $1)/eg; |
|
0
|
|
|
|
|
0
|
|
716
|
0
|
|
|
|
|
0
|
printf $out " ES Descriptor: Type=0x%.2x \"$dstr\"\n", $descriptor_tag; |
717
|
|
|
|
|
|
|
} |
718
|
|
|
|
|
|
|
# parse type-specific descriptor information (once) |
719
|
3
|
50
|
|
|
|
6
|
unless ($didPID{$pid}) { |
720
|
3
|
100
|
|
|
|
8
|
if ($descriptor_tag == 0x81) { # AC-3 |
721
|
1
|
|
|
|
|
4
|
ParseAC3Descriptor($et, \$desc); |
722
|
|
|
|
|
|
|
} |
723
|
|
|
|
|
|
|
} |
724
|
|
|
|
|
|
|
} |
725
|
2
|
|
|
|
|
6
|
$pos += $es_info_length; |
726
|
|
|
|
|
|
|
} |
727
|
|
|
|
|
|
|
} |
728
|
|
|
|
|
|
|
# $pos = $end + 4; # skip CRC |
729
|
|
|
|
|
|
|
|
730
|
|
|
|
|
|
|
} elsif (not defined $didPID{$pid}) { |
731
|
|
|
|
|
|
|
|
732
|
|
|
|
|
|
|
# save data from the start of each elementary stream |
733
|
3
|
100
|
|
|
|
6
|
if ($payload_unit_start_indicator) { |
734
|
2
|
50
|
|
|
|
4
|
if (defined $data{$pid}) { |
735
|
|
|
|
|
|
|
# we must have a whole section, so parse now |
736
|
0
|
|
|
|
|
0
|
my $more = ParsePID($et, $pid, $pidType{$pid}, $pidName{$pid}, \$data{$pid}); |
737
|
|
|
|
|
|
|
# start fresh even if we couldn't process this PID yet |
738
|
0
|
|
|
|
|
0
|
delete $data{$pid}; |
739
|
0
|
0
|
|
|
|
0
|
unless ($more) { |
740
|
0
|
|
|
|
|
0
|
delete $needPID{$pid}; |
741
|
0
|
|
|
|
|
0
|
$didPID{$pid} = 1; |
742
|
0
|
|
|
|
|
0
|
next; |
743
|
|
|
|
|
|
|
} |
744
|
|
|
|
|
|
|
# set flag indicating we found this PID but we still want more |
745
|
0
|
|
|
|
|
0
|
$needPID{$pid} = -1; |
746
|
|
|
|
|
|
|
} |
747
|
|
|
|
|
|
|
# check for a PES header |
748
|
2
|
50
|
|
|
|
5
|
next if $pos + 6 > $pEnd; |
749
|
2
|
|
|
|
|
6
|
my $start_code = Get32u(\$buff, $pos); |
750
|
2
|
50
|
|
|
|
5
|
next unless ($start_code & 0xffffff00) == 0x00000100; |
751
|
2
|
|
|
|
|
3
|
my $stream_id = $start_code & 0xff; |
752
|
2
|
50
|
|
|
|
3
|
if ($verbose > 1) { |
753
|
0
|
|
|
|
|
0
|
my $pes_packet_length = Get16u(\$buff, $pos + 4); |
754
|
0
|
|
|
|
|
0
|
printf $out " Stream ID: 0x%.2x\n", $stream_id; |
755
|
0
|
|
|
|
|
0
|
print $out " Packet Len: $pes_packet_length\n"; |
756
|
|
|
|
|
|
|
} |
757
|
2
|
|
|
|
|
3
|
$pos += 6; |
758
|
2
|
50
|
|
|
|
5
|
unless ($noSyntax{$stream_id}) { |
759
|
2
|
50
|
|
|
|
5
|
next if $pos + 3 > $pEnd; |
760
|
|
|
|
|
|
|
# validate PES syntax |
761
|
2
|
|
|
|
|
4
|
my $syntax = Get8u(\$buff, $pos) & 0xc0; |
762
|
2
|
50
|
|
|
|
4
|
$syntax == 0x80 or $et->Warn('Bad PES syntax'), next; |
763
|
|
|
|
|
|
|
# skip PES header |
764
|
2
|
|
|
|
|
5
|
my $pes_header_data_length = Get8u(\$buff, $pos + 2); |
765
|
2
|
|
|
|
|
3
|
$pos += 3 + $pes_header_data_length; |
766
|
2
|
50
|
|
|
|
5
|
next if $pos >= $pEnd; |
767
|
|
|
|
|
|
|
} |
768
|
2
|
|
|
|
|
7
|
$data{$pid} = substr($buff, $pos, $pEnd-$pos); |
769
|
|
|
|
|
|
|
} else { |
770
|
1
|
50
|
|
|
|
3
|
unless (defined $data{$pid}) { |
771
|
|
|
|
|
|
|
# (vsys a6l dashcam GPS record doesn't have a start indicator) |
772
|
0
|
0
|
|
|
|
0
|
next unless $gpsPID{$pid}; |
773
|
0
|
|
|
|
|
0
|
$data{$pid} = ''; |
774
|
|
|
|
|
|
|
} |
775
|
|
|
|
|
|
|
# accumulate data for each elementary stream |
776
|
1
|
|
|
|
|
4
|
$data{$pid} .= substr($buff, $pos, $pEnd-$pos); |
777
|
|
|
|
|
|
|
} |
778
|
|
|
|
|
|
|
# save only the first 256 bytes of most streams, except for |
779
|
|
|
|
|
|
|
# unknown or H.264 streams where we save 1 kB |
780
|
3
|
100
|
66
|
|
|
11
|
my $saveLen = (not $pidType{$pid} or $pidType{$pid} == 0x1b) ? 1024 : 256; |
781
|
3
|
50
|
|
|
|
7
|
if (length($data{$pid}) >= $saveLen) { |
782
|
0
|
|
|
|
|
0
|
my $more = ParsePID($et, $pid, $pidType{$pid}, $pidName{$pid}, \$data{$pid}); |
783
|
0
|
0
|
|
|
|
0
|
next if $more < 0; # wait for program map table (hopefully not too long) |
784
|
0
|
|
|
|
|
0
|
delete $data{$pid}; |
785
|
0
|
0
|
|
|
|
0
|
$more and $needPID{$pid} = -1, next; # parse more of these |
786
|
0
|
|
|
|
|
0
|
delete $needPID{$pid}; |
787
|
0
|
|
|
|
|
0
|
$didPID{$pid} = 1; |
788
|
|
|
|
|
|
|
} |
789
|
3
|
|
|
|
|
4
|
next; |
790
|
|
|
|
|
|
|
} |
791
|
2
|
50
|
|
|
|
5
|
if ($needPID{$pid}) { |
792
|
|
|
|
|
|
|
# we found and parsed a section with this PID, so |
793
|
|
|
|
|
|
|
# delete from the lookup of PID's we still need to parse |
794
|
2
|
|
|
|
|
4
|
delete $needPID{$pid}; |
795
|
2
|
|
|
|
|
4
|
$didPID{$pid} = 1; |
796
|
|
|
|
|
|
|
} |
797
|
|
|
|
|
|
|
} |
798
|
|
|
|
|
|
|
|
799
|
|
|
|
|
|
|
# calculate Duration if available |
800
|
1
|
50
|
|
|
|
3
|
$endTime = $fwdTime unless defined $endTime; |
801
|
1
|
50
|
33
|
|
|
6
|
if (defined $startTime and defined $endTime) { |
802
|
1
|
50
|
|
|
|
2
|
$endTime += 0x80000000 * 1200 if $startTime > $endTime; # handle 33-bit wrap |
803
|
1
|
|
|
|
|
4
|
$et->HandleTag($tagTablePtr, 'Duration', $endTime - $startTime); |
804
|
|
|
|
|
|
|
} |
805
|
|
|
|
|
|
|
|
806
|
1
|
50
|
|
|
|
5
|
if ($verbose) { |
807
|
0
|
|
|
|
|
0
|
my @need; |
808
|
0
|
|
|
|
|
0
|
foreach (keys %needPID) { |
809
|
0
|
0
|
|
|
|
0
|
push @need, sprintf('0x%.2x',$_) if $needPID{$_} > 0; |
810
|
|
|
|
|
|
|
} |
811
|
0
|
0
|
|
|
|
0
|
if (@need) { |
812
|
0
|
|
|
|
|
0
|
@need = sort @need; |
813
|
0
|
|
|
|
|
0
|
print $out "End of file. Missing PID(s): @need\n"; |
814
|
|
|
|
|
|
|
} else { |
815
|
0
|
0
|
|
|
|
0
|
my $what = $eof ? 'of file' : 'scan'; |
816
|
0
|
|
|
|
|
0
|
print $out "End $what. All PID's parsed.\n"; |
817
|
|
|
|
|
|
|
} |
818
|
|
|
|
|
|
|
} |
819
|
|
|
|
|
|
|
|
820
|
|
|
|
|
|
|
# parse any remaining partial PID streams |
821
|
1
|
|
|
|
|
2
|
my $pid; |
822
|
1
|
|
|
|
|
5
|
foreach $pid (sort keys %data) { |
823
|
2
|
|
|
|
|
8
|
ParsePID($et, $pid, $pidType{$pid}, $pidName{$pid}, \$data{$pid}); |
824
|
2
|
|
|
|
|
6
|
delete $data{$pid}; |
825
|
|
|
|
|
|
|
} |
826
|
1
|
|
|
|
|
7
|
return 1; |
827
|
|
|
|
|
|
|
} |
828
|
|
|
|
|
|
|
|
829
|
|
|
|
|
|
|
1; # end |
830
|
|
|
|
|
|
|
|
831
|
|
|
|
|
|
|
__END__ |