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Bertrik Sikken afc96087f8 New crossfeed algorithm for Rockbox: "Meier" crossfeed 
Emulates the basic "Meier" crossfeed (2 capacitors, 3 resistors)
as discussed in
http://www.meier-audio.homepage.t-online.de/passivefilter.htm

This crossfeed blends a bit of low-pass filtered L signal into
the R signal (and vice versa) while adding about 300 us delay
to the crossfed-signal. A difference with the crossfeed already
present in rockbox, is that this algorithm keeps the total
spectrum flat (the one currently in rockbox accentuates
low-frequency signals, making it sound a bit muffled).

This implementation is quite lightweight, just 3 multiplies per
left-right pair of samples. Has a default C implementation and
optimized assembly versions for ARM and Coldfire.

The crossfeed effect is quite subtle and is noticeable mostly
one albums that have very strong left-right separation (e.g.
one instrument only on the left, another only on the right).

In the user interface, the new crossfeed option appears as
"Meier" and is not configureable. The existing crossfeed is
renamed to "Custom" as it allows itself to be customised.

There is no entry for the user manual yet.

Change-Id: Iaa100616fe0fcd7e16f08cdb9a7f41501973eee1
2012-05-28 11:34:15 +02:00
..
beatbox Revise the PCM callback system after adding multichannel audio. 2012-03-03 07:23:38 +01:00
bitmaps Fix Rockblox plugin display issues on Clip Zip 2012-04-22 12:33:12 +02:00
chessbox hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
clock Make local functions static in clock and chessbox plugin 2011-12-31 20:29:08 +00:00
doom hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
fft hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
fractals hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
frotz Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
goban hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
imageviewer hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
lib load_code/overlay: Don't close plugin handle before calling the plugin. 2012-05-26 22:57:21 +02:00
lua Make lbitlib.c include its own header (for the luaopen_bit prototype) 2012-05-19 01:19:20 +02:00
midi hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
mikmod mikmod plugin: make functions static when possible 2012-04-14 17:31:14 +02:00
mpegplayer New crossfeed algorithm for Rockbox: "Meier" crossfeed 2012-05-28 11:34:15 +02:00
pacbox hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
pdbox Refactor and unify objcopy calls in the build system. Also now properly handles DEBUG builds on hosted targets to keep debug symbols if necessary. 2012-04-04 21:48:19 +02:00
pictureflow Refactor and unify objcopy calls in the build system. Also now properly handles DEBUG builds on hosted targets to keep debug symbols if necessary. 2012-04-04 21:48:19 +02:00
reversi hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
rockboy Don't reinvent ctype.h functions 2012-05-07 18:43:12 +02:00
searchengine
shortcuts plugins: another round of making local functions static 2011-10-15 20:38:08 +00:00
sudoku hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
text_viewer hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
zxbox hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
alarmclock.c Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
alpine_cdc.c plugins: another round of making local things static and adding missing #includes 2011-12-28 11:32:13 +00:00
battery_bench.c Creative Zen x-fi: fix battery bench plugin 2012-05-20 17:06:14 +02:00
bench_mem_jpeg.c
bench_scaler.c
blackjack.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
boomshine.lua Use PLA in boomshine.lua instead of the awkward kbd_input context. This enables it on RaaA. 2012-01-27 09:15:05 +01:00
bounce.c bounce's plugin PLA integration (main code + manual) 2012-02-24 13:11:51 +01:00
brickmania.c brickmania: Disable resuming after game over 2012-04-30 12:06:05 +02:00
bubbles.c Sansa Clip Zip: Bubble now shows a proper background image 2012-03-03 02:54:26 +01:00
BUILD_OVERLAY
calculator.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
calendar.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
CATEGORIES rocklife is much more a demo than a game. 2012-02-06 09:29:39 +01:00
chessbox.c
chessclock.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
chip8.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
chopper.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
clix.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
codebuster.c
credits.c * Rename backlight_force_on to backlight_ignore_timeout to make it clear what the function does. 2011-01-24 12:29:16 +00:00
credits.pl
crypt_firmware.c
cube.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
demystify.c plugins: another round of making local functions static 2011-10-15 20:38:08 +00:00
dice.c Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
dict.c plugins: make local functions static for a subset of plugins 2011-09-17 17:20:27 +00:00
disktidy.c disktidy: don't use "abort" for variable name as it might conflict 2011-12-14 04:42:03 +00:00
disktidy.config Revert r31239 and r31250. Selecting ALL in disktidy used to be generally safe for most people, and these changes change that, making it easy to delete most or all of a user's music. This is a *very* bad idea. 2011-12-26 00:03:28 +00:00
elfdep.pl
euroconverter.c
fire.c Fix warnings 2011-10-15 20:51:12 +00:00
fireworks.c fireworks: ues PLA_EXIT to exit without going through the menu. 2012-02-24 15:06:18 +01:00
firmware_flash.c
flipit.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
goban.c
greyscale.c * Rename backlight_force_on to backlight_ignore_timeout to make it clear what the function does. 2011-01-24 12:29:16 +00:00
helloworld.c
helloworld.lua
invadrox.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
iriver_flash.c Fix warning about using static vars in non static inline functions with gcc 4.5. 2010-12-27 10:46:29 +00:00
iriverify.c Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
jackpot.c plugins: another round of making local things static and adding missing #includes 2011-12-28 11:32:13 +00:00
jewels.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
keybox.c Fix further 'variable set but not used' warnings reported from GCC 4.6.0. 2011-05-01 13:48:28 +00:00
lamp.c Fix reds. No need for #ifdef to save buttons anymore. 2012-02-08 19:01:10 +01:00
logo.c Plugin logo PLA integration (code + manual) 2012-03-03 12:05:58 +01:00
lrcplayer.c Build librbcodec with DSP and metadata. 2012-03-18 12:00:39 +01:00
matrix.c matrix: shorten statement. 2012-03-03 16:45:59 +01:00
maze.c Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
mazezam.c * Rename backlight_force_on to backlight_ignore_timeout to make it clear what the function does. 2011-01-24 12:29:16 +00:00
md5sum.c
metronome.c Tweak paramters of mp3_play_data and callback. 2012-03-04 14:50:47 -05:00
minesweeper.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
mosaique.c Plugin mosaique PLA integration (code + manual) 2012-03-03 16:37:47 +01:00
mp3_encoder.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
nim.c
oscilloscope.c Clean up peak calculating code. 2012-05-02 20:53:07 -04:00
pegbox.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
pictureflow.c
pitch_detector.c Revise the PCM callback system after adding multichannel audio. 2012-03-03 07:23:38 +01:00
plasma.c Fix warnings 2011-10-15 20:51:12 +00:00
plugin.lds M5/X5 (MCF5250): Scoot the core/plugin IRAM boundary forward by 0x800. 2012-04-29 14:35:53 -04:00
plugin_crt0.c Commit to certain names for cache coherency APIs and discard the aliases. 2011-12-17 07:27:24 +00:00
plugins.make Add codecs to librbcodec. 2012-04-25 22:13:20 +02:00
pong.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
properties.c Use two lined display in properties. 2012-04-09 18:56:08 +02:00
random_folder_advance_config.c Option to constrain get_next_dir() to directories below global_settings.start_directory. 2012-03-19 11:49:55 +01:00
remote_control.c
resistor.c Fix FS#11675 : LED resistor calculator does not wait for keypress. Thanks to Michael Chicoine for reporting the bug. 2011-12-02 01:58:07 +00:00
robotfindskitten.c Declaration of 'pause' from robotfindskitten has conflicting types for 'pause' from android-ndk-r5 2011-01-22 18:27:05 +00:00
rockblox.c Fix Rockblox plugin display issues on Clip Zip 2012-04-22 12:33:12 +02:00
rockblox1d.c rockblox1d's plugin PLA integration (main code + manual) 2012-02-18 23:57:22 +01:00
rockbox-fonts.config
rockbox_flash.c Improve rockbox_flash messages 2012-02-05 16:26:09 +01:00
rockboy.c
rocklife.c plugins: another round of making local functions static 2011-10-15 20:38:08 +00:00
rockpaint.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
search.c Changed the FOR_NB_SCREENS macro to always be a for loop that declares its own loop variable. This removes the need to declare this variable in the outer scope. 2011-10-15 19:35:02 +00:00
settings_dumper.c
shopper.c plugins: make local functions static for a subset of plugins 2011-09-17 17:20:27 +00:00
sliding_puzzle.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
snake.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
snake2.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
snake2.levels
snow.c Plugin snow PLA integration (code + manual) 2012-03-03 10:48:22 +01:00
sokoban.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
sokoban.levels
solitaire.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
sort.c plugins: make local functions static for a subset of plugins 2011-09-17 17:20:27 +00:00
SOURCES Oops forgot to remove test_codec from plugin SOURCES. 2012-04-29 04:13:10 -04:00
SOURCES.app_build clix: Add cells for 320x480. Enable for touchscreen RaaA. 2012-01-30 00:51:43 +01:00
spacerocks.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
splitedit.c plugins: another round of making local functions static 2011-10-15 20:38:08 +00:00
star.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
starfield.c Clean up peak calculating code. 2012-05-02 20:53:07 -04:00
stats.c stats's plugin PLA integration (main code + manual) 2012-02-22 09:15:50 +01:00
stopwatch.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
stopwatch.lua stopwatch.lua: Improve button layout. Enable on touchscreen RaaA. 2012-01-29 22:35:49 +01:00
SUBDIRS hm60x: Add support for plugins. 2012-04-19 17:31:13 +04:00
SUBDIRS.app_build reversi: Fix viewport initialization. Improve button layout for portrait. Enable for toucschreen RaaA. 2012-01-30 00:17:47 +01:00
superdom.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
test_boost.c
test_codec.c Fundamentally rewrite much of the audio DSP. 2012-04-29 10:00:56 +02:00
test_core_jpeg.c
test_disk.c revert changes in test_disk.c introduced by accident in r30459 2012-03-22 18:37:55 +01:00
test_fps.c test_X plugins PLA integration 2012-03-03 19:55:51 +01:00
test_gfx.c rbpaths: Add new special dir HOME_DIR for RaaA. 2011-12-25 20:11:18 +00:00
test_grey.c test_X plugins PLA integration 2012-03-03 19:55:51 +01:00
test_greylib_bitmap_scale.c test_X plugins PLA integration 2012-03-03 19:55:51 +01:00
test_mem.c Higher precision for test_mem plugin. 2011-01-01 19:54:01 +00:00
test_mem_jpeg.c
test_resize.c
test_sampr.c Revise the PCM callback system after adding multichannel audio. 2012-03-03 07:23:38 +01:00
test_scanrate.c test_X plugins PLA integration 2012-03-03 19:55:51 +01:00
test_touchscreen.c test_touchscreen.rock: Add keymap for sdl and android. 2012-01-27 09:15:05 +01:00
test_viewports.c
test_viewports.lua
text_editor.c Don't reinvent ctype.h functions 2012-05-07 18:43:12 +02:00
theme_remove.c
vbrfix.c GSoC/Buflib: Replace all direct accesses to audiobuf with buffer API functions. 2011-08-14 15:13:00 +00:00
video.c Tweak paramters of mp3_play_data and callback. 2012-03-04 14:50:47 -05:00
viewers.config rocklife is much more a demo than a game. 2012-02-06 09:29:39 +01:00
vu_meter.c Clean up peak calculating code. 2012-05-02 20:53:07 -04:00
wav2wv.c
wavplay.c Clean up multiple definitions of RAM size. Remove -DMEM (make) and MEM (code), use the already defined MEMORYSIZE instead. 2011-02-02 17:43:32 +00:00
wavrecord.c Fix r29171 red. Forgot to replace a few. 2011-01-30 01:15:23 +00:00
wavview.c plugins: make local functions static for metronome, rockblox1d, wavview 2011-10-04 19:33:52 +00:00
wormlet.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
xobox.c hm801: Add support for plugins. 2012-04-19 17:31:13 +04:00
zxbox.c