/usr/lib/pd/extra/pdp/introduction/traffic.pd is in pd-pdp 1:0.14.1-3build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 | #N canvas 155 92 978 574 10;
#X msg 362 2 stop;
#X obj 362 27 metro 40;
#X obj 362 53 pdp_v4l;
#X obj 32 524 pdp_glx;
#X obj 847 336 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 0
1;
#X obj 847 388 pdp_control;
#X msg 847 361 thread \$1;
#X obj 434 56 hdl 15 1 1 4 empty empty empty 0 -6 0 8 -262144 -1 -1
2;
#X obj 432 278 pdp_del 25;
#X obj 410 332 pdp_mix;
#X obj 457 305 hsl 128 15 0 1 0 1 empty empty empty -2 -6 0 8 -262144
-1 -1 6500 1;
#X floatatom 497 249 5 0 0;
#X text 457 83 packet router. second inlet sets destination outlet.
creation argument sets number of outlets.;
#X obj 240 333 pdp_snap;
#X obj 240 302 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 249 357 packet snapshot;
#X msg 262 301 snap;
#X obj 410 456 pdp_trigger;
#X text 508 463 before it passes the packet;
#X text 507 450 trigger sends a bang on right outlet;
#X obj 482 487 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 248 389 bang sends out packet;
#X obj 434 146 send packet;
#X text 524 138 pdp packets can be sent over send/receive pairs;
#X text 523 152 (not over netsend/netreceive pairs!);
#X obj 451 382 pdp_pps;
#X floatatom 451 412 5 0 0;
#X text 513 381 packet rate calculator;
#X obj 32 21 receive packet;
#X obj 203 254 pdp_reg;
#X text 68 222 a packet register;
#X text 58 235 (like int and float);
#X obj 32 81 pdp_mix;
#X obj 79 51 hsl 128 15 0 1 0 1 empty empty empty -2 -6 0 8 -262144
-1 -1 10500 1;
#X obj 32 136 pdp_conv;
#X obj 203 227 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 115 70 feedback;
#X obj 362 87 pdp_route 4;
#X text 107 82 is allowed;
#X obj 335 3 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 754 292 enable or disable processing;
#X text 754 307 in separate thread;
#X text 471 342 second inlet 0->1;
#X text 472 328 mix (crossfade) 2 packets.;
#X floatatom 83 111 5 0 0;
#X text 58 253 left: hot packet;
#X text 58 267 right: cold packet;
#X floatatom 847 449 5 0 0;
#X obj 847 420 route pdp_drop;
#X text 801 473 dropped packet counter;
#X text 43 159 convolution: default is blur;
#X text 135 110 number of passes;
#X text 248 373 snap takes snapshot;
#X text 134 118 comment;
#X text 431 185 packet delay line. second inlet sets delay. creation
argument sets total delay line length. WARNING: this uses a lot of
memory. keep the size small to prevent the system to start swapping
to disk.;
#X connect 0 0 1 0;
#X connect 1 0 2 0;
#X connect 2 0 37 0;
#X connect 4 0 6 0;
#X connect 5 0 48 0;
#X connect 6 0 5 0;
#X connect 7 0 37 1;
#X connect 8 0 9 1;
#X connect 9 0 17 0;
#X connect 9 0 25 0;
#X connect 10 0 9 2;
#X connect 11 0 8 1;
#X connect 13 0 3 0;
#X connect 14 0 13 0;
#X connect 16 0 13 0;
#X connect 17 0 3 0;
#X connect 17 1 20 0;
#X connect 25 0 26 0;
#X connect 28 0 32 0;
#X connect 29 0 3 0;
#X connect 32 0 34 0;
#X connect 33 0 32 2;
#X connect 34 0 32 1;
#X connect 34 0 3 0;
#X connect 35 0 29 0;
#X connect 37 0 29 1;
#X connect 37 1 13 1;
#X connect 37 2 8 0;
#X connect 37 2 9 0;
#X connect 37 3 22 0;
#X connect 39 0 1 0;
#X connect 44 0 34 1;
#X connect 48 0 47 0;
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