This file is indexed.

/usr/lib/pd/extra/pdp/reference.txt is in pd-pdp 1:0.14.1-3+b1.

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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
This is a list of all pdp objects and abstractions with a minimal description.
Take a look at the patches in the doc/ directory for more info. 
(Messy doc & test patches can be found in the test/ directory.)

general purpose pdp modules:

pdp_del		a packet delay line
pdp_reg		a packet register
pdp_snap	takes a snapshot of a packet stream
pdp_trigger	similar to pd's trigger object
pdp_route	routes a packet to a specific outlet
pdp_loop	a packet loop sampler (packet array)
pdp_description	output a symbol describing the packet type
pdp_convert	convert between packet types
pdp_metro~	audio/video sync object

image inputs/outputs:

pdp_xv		displays images using the xvideo extension
pdp_glx		displays images using opengl
pdp_v4l		reads images from a video4linux device
pdp_qt		reads quicktime movies
pdp_rawin	read packets from pipe or file
pdp_rawout	write packets to pipe or file
pdp_rawout~	write audio to pipe or file

image processors:

pdp_abs		absolute value
pdp_add		adds two images
pdp_and		bitwize and
pdp_array2grey	convert pd array to greyscale image
pdp_grey2array	convert greyscale image to pd array
pdp_bitdepth	set bit depth
pdp_bitmask	apply a bit mask
pdp_bq		spatial biquad filter
pdp_bqt		temporal biquad filter
pdp_cog		gaussian blob estimator
pdp_constant	fills an image with a constant
pdp_conv	horizontal/vertical seperable convolution filter
pdp_cheby	chebyshev color shaper
pdp_chrot	rotates the chroma components
pdp_flip_lr	flip left <-> right
pdp_flip_tb	flip top <-> bottom
pdp_grey	converts an image to greyscale
pdp_grey2mask	converts a greyscale image to an image mask
pdp_hthresh	hard thresholding
pdp_mul		multiplies two images
pdp_mix		crossfade between 2 images
pdp_mix2	mixes 2 images after applying a gain to each of them
pdp_noise	a noise generator
pdp_not		bitwize not
pdp_or		bitwize or
pdp_plasma	plasma generator
pdp_pointcloud	convert an image to a point cloud
pdp_positive	sign function that creates a bitmask
pdp_randmix	crossfades 2 images by taking random pixels
pdp_rotate	tiled rotate
pdp_scale	rescale an image
pdp_sign	sign function
pdp_sthresh	soft thresholding
pdp_zoom	tiled zoom
pdp_zrot	tiled zoom + rotate
pdp_zthresh	zero threshold (x<0 -> 0)
pdp_xor		bitwize xor

dsp objects

pdp_scope~	a very simple oscilloscope
pdp_scan~	phase input scanned synthesis oscillator
pdp_scanxy~	x,y coordinate input scanned synthesis oscillator


utility abstractions

pdp_pps			computes the packet rate in packets/sec

image abstractions

pdp_affine		scale (gain) + offset
pdp_agc			automatic gain control (intensity maximizer)
pdp_alledge		an all edge detector
pdp_blur		blurs an image
pdp_blur_hor		horizontal blur
pdp_blur_ver		vertical blur
pdp_contrast		contrast enhancement
pdp_conv_alledge	edge detector
pdp_conv_emboss		emboss effect
pdp_conv_smooth		smoothing
pdp_conv_sobel_hor	horizontal sobel edge detector
pdp_conv_sobel_ver	vertical sobel edge detector
pdp_conv_sobel_edge	sum of squares of hor and ver edge detector
pdp_dither		a dither effect
pdp_gain3		independent channel gains
pdp_gradient		grayscale to colour gradient conversion
pdp_grey		convert image to greyscale
pdp_invert		invert video
pdp_motion_blur		blurs motion
pdp_motion_fade		motion triggered fade out
pdp_motion_phase	phase shifts motion
pdp_offset		add an offset to an image
pdp_phase		applies an allpass filter to an image
pdp_phase_hor		horizontal allpass
pdp_phase_ver		vertical allpass
pdp_png_to		convert a png file (on disk) to a certain packet type
pdp_qt_control		movie file controller (different play modes)
pdp_qtloop~		varispeed (interpolated) looper
pdp_qtloop2~		same, but depends on tabreadmix~ from creb
pdp_saturation		change colour saturation
pdp_save_png_sequence	save png sequence in /tmp dir
pdp_sub			subtract 2 images
pdp_invert		inverse video
pdp_tag			tag a packet (to use it with route)
pdp_xv_keycursor	a keyboard/mouse controller using pdp_xv


matrix processors

pdp_m_mv		matrix vector multiply
pdp_m_mm		matrix matrix multiply
pdp_m_+=mm		matrix matrix multiply add
pdp_m_LU		compute LU decomposition
pdp_m_LU_inverse	compute matrix inverse from LU decomp
pdp_m_LU_solve		solve a linear system using LU decomp

matrix abstractions

pdp_m_inverse		compute matrix inverse




SEPARATE LIBRARIES:

cellular automata
(pdp_scaf)

pdp_ca			computes a cellular automaton (as a generator or a filter)
pdp_ca2image		convert a CA packet to a greyscale image (obsolete: use pdp_convert)
pdp_image2ca		convert an image to a CA packet (black and white) (obsolete: use pdp_convert)


3d drawing objects
(pdp_opengl)

3dp_windowcontext	a drawable window
3dp_draw		draw objects (cube, sphere, ...)
3dp_view		viewing transforms (rotate, translate, ...)
3dp_light		light source
3dp_push		push a matrix (modelview, texture, ...)
3dp_dlist		compile a display list
3dp_snap		copies the drawing buffer to a texture packet
3dp_mode		set the current matrix mode
3dp_toggle		set some opengl state variables


3d drawing abstractions (pdp_opengl)

3dp_mouserotate		connect to 3dp_windowcontext to rotate the scene
3dp_blend		turn on accumulative blending mode