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Aidan MacDonald 5b27e2255a Add perceptual volume adjustment 
The perceived loudness change of a change in volume depends
on the listening volume: at high volumes a 1 dB increment is
noticeable, but at low volumes a larger increment is needed
to get a comparable change in loudness.

Perceptual volume adjustment accounts for this fact, and
divides the hardware volume range into a number of steps.
Each step changes the dB volume by a variable amount, with
most of the steps concentrated at higher volumes. This
makes it possible to sweep over the entire hardware volume
range quickly, without losing the ability to finely adjust
the volume at normal listening levels.

Use "Volume Adjustment Mode" in the system settings menu
to select perceptual volume mode. The number of steps used
is controlled by "Number of Volume Steps". (Number of steps
has no effect in direct adjustment mode.)

It's still possible to set a specific dB volume level from
the sound settings menu when perceptual volume is enabled,
and perceptual volume does not affect the volume displayed
by themes.

Change-Id: I6f91fd3f7c5e2d323a914e47b5653033e92b4b3b
2023-01-22 21:19:57 +00:00
..
bitmaps
gui Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
hosted/android replace strlcpy with strmemccpy 2022-11-14 23:56:16 -05:00
iap Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
keymaps [Feature] xduoo X3 add pitchscreen hotkey to wps 2023-01-13 23:56:10 -05:00
lang Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
menus Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
plugins Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
radio Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
recorder Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
abrepeat.c
abrepeat.h abrepeat add dummy functions and remove some of the ifdefs 2022-12-14 23:37:14 -05:00
action.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
action.h [Feature/Bugfix] keyremap add Context flags 2022-12-31 16:12:18 -05:00
alarm_menu.c
alarm_menu.h
appevents.h
applimits.h
apps.make
audio_path.c
audio_thread.c
audio_thread.h
beep.c
bookmark.c wps.c cleanup gui_show_wps 2022-12-14 22:35:33 -05:00
bookmark.h Fix return to root after selecting items from playlist viewer 2022-11-19 10:01:23 +01:00
buffering.c [BugFix] Buffering.c NULL src for memcpy is UB -- ASAN 2023-01-04 20:20:08 -05:00
buffering.h
codec_thread.c
codec_thread.h
codecs.c
core_asmdefs.c
core_keymap.c Add core_get_data_pinned(), use it where possible 2023-01-15 08:57:45 -05:00
core_keymap.h key remap: simplify and use movable allocations 2022-09-25 11:05:59 +01:00
cuesheet.c cuesheet.c guard against invalid digits causing underflow on field ASAN 2022-11-21 23:24:30 -05:00
cuesheet.h
debug_menu.c [Feature] Add total entries to database info 2023-01-15 22:57:00 -05:00
debug_menu.h
enc_config.c menus remove reserved 'param' parameter 2022-12-17 04:24:37 -05:00
enc_config.h
features.txt Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
filetree.c [Feature] filetree fallback to loading a playlist from disk 2023-01-08 09:52:23 -05:00
filetree.h Don't autoload bookmarks after saving dynamic playlist 2022-10-18 07:23:25 -04:00
filetypes.c buflib_shrink use NULL to signal start isn't changing 2023-01-13 09:50:29 -05:00
filetypes.h [Bug Fix] filetypes.c move voice data out of INIT_ATTR 2022-12-13 22:35:24 -05:00
fracmul.h
keyboard.h
language.c
language.h
logfdisp.c misc.c open_pathfmt caller supplied buffer 2022-11-23 22:09:46 -05:00
logfdisp.h
main.c remove rockboxlogo after boot INIT_ATTR 2022-12-19 18:59:59 -05:00
menu.c settings: Remove setting ID return from find_setting() 2022-12-17 13:36:38 +00:00
menu.h menus remove reserved 'param' parameter 2022-12-17 04:24:37 -05:00
misc.c Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
misc.h Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
onplay.c database: make parent tables work with plugin 2023-01-19 15:56:35 -05:00
onplay.h Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
open_plugin.c Remove browse_context_init() 2022-12-17 13:36:38 +00:00
open_plugin.h open_plugin.c access open_plugin_entry through a function 2022-12-16 09:05:06 -05:00
pcmbuf.c
pcmbuf.h
playback.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
playback.h
playlist.c playlist: pin dircache fileref buffer during background scanning 2023-01-22 13:47:50 +00:00
playlist.h playlist: pin dircache fileref buffer during background scanning 2023-01-22 13:47:50 +00:00
playlist_catalog.c Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
playlist_catalog.h Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
playlist_menu.h
playlist_viewer.c Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
playlist_viewer.h Playlist Catalogue: Restore selection in playlist 2022-11-26 17:20:06 +01:00
plugin.c Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
plugin.h Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
rbcodec_helpers.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
rbcodecconfig.h
rbcodecplatform.h
README
root_menu.c Remove browse_context_init() 2022-12-17 13:36:38 +00:00
root_menu.h
screen_access.c make splash split on control characters 2022-11-12 06:22:16 -05:00
screen_access.h make splash split on control characters 2022-11-12 06:22:16 -05:00
screens.c PictureFlow: Add 'Track Info' for tracks or whole albums 2023-01-10 18:50:12 +01:00
screens.h plugins: Properties: Add 'Last Modified' for audio files 2023-01-06 19:00:24 +01:00
settings.c settings: Remove setting ID return from find_setting() 2022-12-17 13:36:38 +00:00
settings.h Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
settings_list.c Add perceptual volume adjustment 2023-01-22 21:19:57 +00:00
settings_list.h settings: Update doc comment for struct settings_list::cfg_vals 2022-12-01 14:24:51 -05:00
shortcuts.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
shortcuts.h
sound_menu.h
SOURCES
status.c
status.h Add a comment about the ordering of 'enum playmode' 2022-11-23 10:08:49 -05:00
tagcache.c [Feature] Add total entries to database info 2023-01-15 22:57:00 -05:00
tagcache.h [Feature] Add total entries to database info 2023-01-15 22:57:00 -05:00
tagnavi.config
tagtree.c database: make parent tables work with plugin 2023-01-19 15:56:35 -05:00
tagtree.h database: make parent tables work with plugin 2023-01-19 15:56:35 -05:00
talk.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
talk.h talk.c clean up 2022-11-19 02:12:09 -05:00
tree.c Database: Add ability to insert multiple files into playlists 2023-01-14 12:14:28 -05:00
tree.h Remove browse_context_init() 2022-12-17 13:36:38 +00:00
usb_keymaps.c
usb_keymaps.h
voice_thread.c Remove buflib allocation names, part two 2023-01-13 10:32:54 +00:00
voice_thread.h

README 

For general information see: docs/README
For API information see: docs/API