input.conf: duplicate some keybind to keypad siblings

They still can be remapped individually by users, but let's duplicate
them by default.

More generic way of 8c6ad1d and
d06f3d3.

Fixes: mpv-player#15993

Author: kasper93

DOCS/man/mpv.rst

@@ -50,6 +50,11 @@ See also ``--input-test`` for interactive binding details by key, and the
 `stats`_ built-in script for key bindings list (including print to terminal). By
 default, the ? key toggles the display of this list.
 
+By default, keypad keys are bound to their siblings, e.g. ``KP_PGUP`` is
+bound to ``PGUP``, unless they are explicitly bound to another function. This is
+defined in the default input.conf and can be changed by the user. ``KP_*`` bindings
+with modifiers are only duplicated if they have a function bound to them.
+
 Keyboard Control
 ----------------
 
@@ -120,9 +125,6 @@ Q
 / and *
     Decrease/increase volume.
 
-KP_DIVIDE and KP_MULTIPLY
-    Decrease/increase volume.
-
 9 and 0
     Decrease/increase volume.
 
@@ -177,9 +179,6 @@ L
 Ctrl++ and Ctrl+-
     Adjust audio delay (A/V sync) by +/- 0.1 seconds.
 
-Ctrl+KP_ADD and Ctrl+KP_SUBTRACT
-    Adjust audio delay (A/V sync) by +/- 0.1 seconds.
-
 G and F
     Adjust subtitle font size by +/- 10%.
 
@@ -237,9 +236,6 @@ Alt+LEFT, Alt+RIGHT, Alt+UP, Alt+DOWN
 Alt++ and Alt+-
     Change video zoom.
 
-Alt+KP_ADD and Alt+KP_SUBTRACT
-    Change video zoom.
-
 Alt+BACKSPACE
     Reset the pan/zoom settings.
 

etc/input.conf

@@ -67,8 +67,6 @@
 #ZOOMIN    add video-zoom   0.1         # zoom in
 #Alt+-     add video-zoom  -0.1         # zoom out
 #ZOOMOUT   add video-zoom  -0.1         # zoom out
-#Alt+KP_ADD      add video-zoom  0.1    # zoom in
-#Alt+KP_SUBTRACT add video-zoom -0.1    # zoom out
 #Ctrl+WHEEL_UP   script-binding positioning/cursor-centric-zoom  0.1 # zoom in towards the cursor
 #Ctrl+WHEEL_DOWN script-binding positioning/cursor-centric-zoom -0.1 # zoom out towards the cursor
 #Alt+BS set video-zoom 0; no-osd set panscan 0; no-osd set video-pan-x 0; no-osd set video-pan-y 0; no-osd set video-align-x 0; no-osd set video-align-y 0 # reset zoom and pan settings
@@ -110,16 +108,12 @@
 #x add sub-delay +0.1                   # delay subtitles by 100 ms
 #ctrl++ add audio-delay  0.100          # change audio/video sync by delaying the audio
 #ctrl+- add audio-delay -0.100          # change audio/video sync by shifting the audio earlier
-#ctrl+KP_ADD      add audio-delay  0.100 # change audio/video sync by delaying the audio
-#ctrl+KP_SUBTRACT add audio-delay -0.100 # change audio/video sync by shifting the audio earlier
 #G add sub-scale +0.1                   # increase the subtitle font size
 #F add sub-scale -0.1                   # decrease the subtitle font size
 #9 add volume -2
 #/ add volume -2
-#KP_DIVIDE add volume -2
 #0 add volume 2
 #* add volume 2
-#KP_MULTIPLY add volume 2
 #m cycle mute                           # toggle mute
 #1 add contrast -1
 #2 add contrast 1
@@ -232,6 +226,36 @@
 #Ctrl+KP_UP    add video-align-y -0.01                          # align video up
 #Ctrl+KP_PGUP  add video-align-x  0.01; add video-align-y -0.01 # align video right and up
 
+#
+# Aliases for keypad keys
+#
+#KP_ADD keypress +
+#KP_BEGIN keypress BEGIN
+#KP_DEC keypress ,
+#KP_DEL keypress DEL
+#KP_DIVIDE keypress /
+#KP_DOWN keypress DOWN
+#KP_END keypress END
+#KP_ENTER keypress ENTER
+#KP_HOME keypress HOME
+#KP_INS keypress INS
+#KP_LEFT keypress LEFT
+#KP_MULTIPLY keypress *
+#KP_PGDWN keypress PGDWN
+#KP_PGUP keypress PGUP
+#KP_RIGHT keypress RIGHT
+#KP_SUBTRACT keypress -
+#KP_UP keypress UP
+
+#Alt+KP_ADD keypress Alt++
+#Alt+KP_SUBTRACT keypress Alt+-
+#Ctrl+KP_ADD keypress Ctrl++
+#Ctrl+KP_SUBTRACT keypress Ctrl+-
+#Shift+KP_END keypress Shift+END
+#Shift+KP_HOME keypress Shift+HOME
+#Shift+KP_PGDWN keypress Shift+PGDWN
+#Shift+KP_PGUP keypress Shift+PGUP
+
 #
 # Legacy bindings (may or may not be removed in the future)
 #