Rockbox

There should be another option on the list of prioritized options for where to place Album Art images and the filenames. There are currently 7:
http://www.rockbox.org/wiki/AlbumArt

My suggested addition would become the new option 2, pushing all others down.
The first option is currently the only option to allow for song-specific artwork to be displayed, but this requires naming the image files *exactly* like the corresponding sound file, which screws up directory sorting.

Therefore the option should be added that if no image file has an identical name to the sound file playing, it then looks for an image file which matches the current song's Title metadata, similarly to how the following option looks for a match to the Album metadata.

This could cause conflicts when two songs have the same name, or when a song shares the album's name, or the song name contains unusable characters, but such conflicts are rare and minimal, and if anyone cares all that much about such things there is already the built-in flexibility to get around such issues. The additional code required should be minimal (and already blueprinted within the other options), and have essentially zero impact on any other functionality.

I may try to write this patch myself (as i did with "shuffle + track skip"), but if anyone beats me to it, it would be appreciated :)

Playing 320K MP3s pauses often in Version 3.15 and daily build 7d00533 also UI becomes unresponsive
Version 3.14 or older does not reproduce the issue in either 44 or 48khz sampling rate and same sound options
Is not reproducible under OF or Version 3.15 running on IPOD 6G
seems to be a cpu usage issue as compiling a version of rockbox with much higher than stock CPU clocks seems to alleviate the issue to an extent but there is still occasional pauses that is not present after reverting to 3.14 and stock 80 mhz clock speed.

On the Sansa C240 V1, to switch on the line level audio output on the dock connector pin 8 needs to go high. So jumping 3V+ from pin 22 will activate the line level audio. This works fine with the Sansa firmware but Rockbox produces no sound through the line level outputs on the C240, with pin 8 jumped or not jumped.

I installed release 3.3 on my Sansa e260. 3.2 worked. On 3.3, volume controls work fine in normal playback mode, but when I switch to FM Radio, they are ignored. If I switch back to normal playback mode, I can set the volume level again, just not while listening to the radio.

What the title says.
At whatever sample rate I use (24k & 48k tested), each sample is duplicated.

This Patch changes the way that ratings work. It’s pretty simple, it reads the rating info from an MP3 files ID3 POPM tag, and converts that to a Rockbox rating value (0 to 10).

You can then use patch  FS#6301  - new tags for WPS and tagcache patch 4 (4_rating.patch) to display the rating on the WPS (tag is %rr). Some Themes use this tag already so I’m not sure if it is in SVN already.

The patch is written for MediaMonkey (alpha 3), but it should work with other version of MediaMonkey, and other programs that put ratings in the ID3 tag (not iTunes).

Tested on iPod nano.

One thing I’m not sure of is what value to return for bufferpos - should this return an int ponting to the next id3 tag position, or is it OK to return it as is? it dosen’t seem to make any difference either way.

Comments are welcome.

Rockbox doesn't speak in the FM mode with voice configured. I tried it in my local language (spanish) and in english with same results. Apparently it is not a problem of the translation, because sometimes (only 2 or 3 times in at about one year that I'm using the player) the player speak some words. This works correctly in release version.
My actual version is 0f89b04, but it happend in all dev versions.

This patch provides a replacement for buffering.c, where there is only minimal buffering (one 32K buffer for audio data and some static buffers for metadata). It is a proof of concept for how this could work on targets with very little RAM.

I would be interested in feedback on the kind of impact this has on runtime, so if you have a flash target please consider giving it a try and reporting your results :)

Note that you will need to disable album art in your build for this to work. I don't even know what would happen if you don't, but it'd probably be bad. To disable it you need to comment or remove the #define HAVE_ALBUMART line in your target's configuration file (firmware/export/config-[TARGET].h).

in version 3.10 chessbox plugin doesn't recognize .pgn files in the file menu and so cannot be used as a .pgn reader anymore.

Daily build: c413591-120705 and earlies.
When I connect powered down my Fuze V1 and disconnect from USB, it hangs displaying USB screen. I must hold power switch for several seconds to power off player. Tested on two different machines with windows7 x64. When I connect powered on player everything works perfectly.

The interface of my Sansa Fuze and the file transfer freeze randomly when transferring large amounts of data. If the player runs in Bootloader USB mode everything is fine.

I guess this could break the vfat file system, making this a nasty bug. Disabling Key and Mouseemulation did not help. As long as this isn't fixed, a solution would be to start the player in Bootloader USB mode by default. I don't know if this is possible though, since I don't know the the technical details of rockbox very well.

Beside that everything works just great, keep up the good word!

PS.: I'm using Debian with different kernels. I couldn't see any differences between different kernel versions regarding this issue. Intels Linux USB drivers and the Linux USB stack in general usually work excellent as far as I know, therefore I would blame it on rockbox (no offense :)).

The version 3.10 is stable and everything works fine, but since I upgraded to the last version 3.11 or the daily build the ipod crashes and I can't mount the device in the computer, the charging doesn't work either.

When I try to build rockbox, I get the following error:

=⇒ make: execvp: /bin/sh: Argument list too long
⇐=

My build path is a fairly long path. Building it at a location with shorter path it works. Details:

Steps to reproduce:

* Create a location where you want to have the sources; use a fairly long path name, e.g.

  mkdir -p /home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/

* Change to that directory:

  cd /home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/

* Download git sources (Tried with version from 2014-09-22, 10:55:11 GMT+1, Commit by "Marcin Bukat marcin.bukat@gmail.com", Change-Id: "Ie3aa9b208e3f4f17d4d02f11f69839e9b381217d") to a long path:

  git clone git://git.rockbox.org/rockbox 

* Make a build directory and change into it:

  mkdir -p /home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/build_FuzeV2
  cd /home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/build_FuzeV2

* Configure the build:

  ../rockbox/tools/configure --target=63 --type=N

prodces the output

==>

Using temporary directory /tmp
Platform set to sansafuzev2
Normal build selected
Using source code root directory: /home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/rockbox
Using arm-elf-eabi-gcc 4.4.4 (404)
Using arm-elf-eabi-ld 2.20.1.20100303
Found and uses ccache (/sbin/ccache)
Automatically selected arch: arm (ver 5)
Created Makefile

<==

* Running "make":

  make

produces the output

==>

Generating dependencies
make: execvp: /bin/sh: Argument list too long
make: *** No rule to make target '/home/myuser/download/mediaplayer_hardware/SanDisk/Sansa_Fuze_v2/rockbox/firmware/source/build_FuzeV2/make.dep', needed by 'all'. Stop.

<==

and returns with exit code 2.

Workaround:

Building it in a directory with shorter path, e.g. doing everything in "/tmp", works.

But that is only a workaround; it should not fail when building in arbitrary locations, and especially not with a message not making it clear _what_ the underlying problem ist. (I had to do a long internet search to get to the idea that the build place can be the problem).

## This was tried out with Sansa Fuzev2 simulator version d392da8-140922, built from git on a 64 bit Linux system ##

I discovered something which seems to be a bug somewhere in the place where WPS get interpreted or rendered.

When I use a scrolling line just after a line containing sublines, the scrolling line stops scrolling as soon as the sublines change the first time.

Below are steps to reproduce it on the UI simulator for the Sansa Fuzev2. I think it also works without using a clear configuration. I haven’t tested with a real device, only with the simulator.

Attached are a .wps-file showing the buggy behaviour (’scrollline_after_sublines_bug.buggy.wps’), and a .wps-file working correctly (’scrollline_after_sublines_bug.workaround.wps’), which are the same files as quoted below.

STEPS TO REPRODUCE:

(0) Use Sansa Fuzev2 simulator version d392da8-140922, build from git on a 64 bit Linux system.

(1) Use a clear configuration, so erase

    .rockbox/.playlist_control
    .rockbox/config.cfg
    .rockbox/nvram.bin
    .rockbox/database.ignore
  in your 'simdisk' directory.

(2) Start the rockbox UI simulator

(3) Change the theme to ‘rockbox_failsafe’, i.e. in the menu, do the following:

• ‘Settings’ → ‘Theme Settings’ → ‘Browse Theme Files’ → ‘rockbox_failsafe.cfg’
• ‘Settings’ → ‘Theme Settings’ → ‘While Playing Screen’ → ‘rockbox_failsafe.wps’
• ‘Settings’ → ‘Theme Settings’ → ‘Radio Screen’ → ‘rockbox_failsafe.fms’
• ‘Settings’ → ‘Theme Settings’ → ‘Base Skin’ → ‘rockbox_failsafe.sbs’

(4) Use the following .wps-file as the “While Playing Screen” skin:

=⇒ # Two sublines:
Text1;Text2
# A long line, scrolling:
%sA very long text which is meant to scroll because it is longer than the screen is wide.
# Another line of just text (Not needed to reproduce the bug, but if it is swapped with the long line above, the long line scrolles correctly):
Textline.
#### Here the following Bug appears:
# When the Line ‘Text1;Text2’ changes the sublines the first time, the subsequent line stops scrolling. It happens when the sublines change; as when you use ‘%t(5)Text1;Text2’, the scrolling stops only after 5 seconds, when the sublines actually change.
⇐=

Workaround:
(4a) Put the scrolling line not directly after a line with sublines. The following .wps as the “While Playing Screen” skin works:

=⇒ # Two sublines:
Text1;Text2
# Another line of just text. Needed to make the long line scrolling correctly:
Textline.
# A long line, scrolling:
%sA very long text which is meant to scroll because it is longer than the screen is wide.
#### Here the bug does not appear, the long line scrolls corretly. But when the long scrolling line is put just below the line with the sublines, it stops scrolling as soon as the sublines change for the first time.
⇐=

This patch changes the frequency range when selecting "Region: Other" for the FM radio:

With this patch, the "full range" from 76 MHz to 108 MHz, in 0.05 MHz steps, is available when selecting the "Other" region.

this is ordinary mp3 file.
I think it was name problem, renamed to simple.
Still not play.
Player Sansa Clip+ (not found in bug report menu)
Rockbox 3.12 (not found in bug report menu)
Standard firmware has no problem with this.
Good luck!

It is 16Mb size so I put it to my dropbox
https://dl.dropbox.com/u/17669498/rockboxbug/08.mp3

This is a reopen of issue #1 of  bug 7354  (http://www.rockbox.org/tracker/task/7354)

SETUP:
HW: sansa clip+
SW: 8687b98-121001

CD's ripped as wav/cue with EAC 1.0b3 then converted to FLAC w/embedded cue with cuetools 2.1.4; used accuraterip to confirm good rip.

EXPECTED BEHAVIOUR:

loading a flac w/embedded cue would display markers within the track and allow forward/back skipping within the track.

ISSUE:
Some tracks I am unable skip to using next/back or rewind to the start of using back.
If I listen to the whole preceeding track then the display updates correctly as it goes.

I've tested this with a handful of CDs, and given the previous bug, this appears to be a general issue with flacs/embedded cuefiles.

Emuriver is an emulator (not simulator) for iriver ifp-7xx series. It’s part of the http://www.rockbox.org/wiki/IriverIfpPort and has until now been hosted at the main author’s (Tomek’s) site http://www.mimuw.edu.pl/~tmal/rockbox/ It includes a tool to create flash images for use with the emulator, and a tool to mount such images and do basic file management on them.

This version is almost identical to the last version from Tomek’s site, but I had to fix a few bugs to make it usable on my system. Changes are as follows:

flashimgtool.c: Outputs usage information on errors. (I didn’t do this; I don’t know where this code came from but it’s useful.)

hardware.c: Bug: Arguments were missing in a function call which would sometimes cause segmentation faults, and (I don’t know why or how) slow down the emulator.

main.c: Changed a default file name from prog_flash.bin to prog_flash.img (I didn’t do this)

main.c: Bug: Added explicit return value to nonvoid function. The implicit return value was sometimes -1 which indicated an error so emuriver aborted.

make_flash_img.c: Optimizations: “if” replaced with “else if”. (I didn’t do this)

uicurses.c: Rename a variable into someting more unique. (I didn’t do this)

The reason I’m submitting this patch is that I think the emulator could be useful as it is for those trying to build the ifp port from SVN, that it could (maybe) be worked on to support other players, and that my bugfixes should be included for those building emuriver.

There are a few issues: The flashimgtool subdir in emuriver duplicates a few (three years old) files from RB, disk.c, fat.c, and some more. You might not like the directory structure. It uses an ancient version of autotools. I haven’t been able to create flash images that actually work with flashimgtool. I haven’t built the RB port for ifp yet, so I don’t know if it will run in emuriver or not.

Yes I have discussed the patch in IRC.

New build target, for iriver E10.

A lot of target-specific functions are missing, so it doesn't compile when it reaches the linker. But I think it's about time to insert the build target into SVN, and #rockbox seems to agree.

Also, building a simulator build works quite well. The simulator BMP and the keymaps needs some work, but it works pretty well, including music playback.

I've done some testing with building for other targets and nothing seems to be broken by this patch. I couldn't figure out how to include the BMP in the patch so i attach it separately.

On my iPod video, when I choose to load the WPS on startup (either in the Settings menu or in the alarm menu), it doesn't work. The player stays on the main (root?) screen.

I had to tweak root_menu.c (which I join) to get the alarm to work with the WPS. This is not a patch, but a quick and dirty workaround that I did just to be waked up on time tomorrow…

The .ape file I join make rockbox produce a horrible noise (like random audio) when seeking inside it. The original file was very large, so I created this one with:
dd if=original.ape of=test.ape bs=512 count=1000
So the produced file may not be correct, but it plays correctly in rockbox, and reproduces the bug, so I join it…

I created the following fonts from DejaVuSans.ttf using ttf2bdf.

I use them as an alternative for unifont, which is fixed-width.

Attached are a screenshot and a tarball with 8 to 12pt versions of the font.
Perhaps they could be included in the official distribution, if others like them.

Rockbox’s file viewer has a global sort setting.

It would be nice to have a default global sort setting, but also persistent per-directory sort settings.

For my use-case, it makes sense for me to sort my podcast directory by date, but I wouldn’t want that to affect my music directories, which should play files sorted by name.
Whenever I wish to play music, I need to go back to the general settings, and change the sort settings. And when I’m done and wish to listen to podcasts, I have to change it again.

Added new menu item under Settings.General.System, to select whether USB cable connection enters charging mode by default, or data transfer mode.

By default, the option is set to "No". Meaning, in order to have RB enter charging mode, a specific button should be pressed by the user.

If the option is set to "Yes", USB connection causes RB to enter charging mode, unless the specified button is pressed, causing RB to switch into data xfer mode.

Settings such as "eq enabled" and "replaygain type" do not apply to a playing track when selected from shortcut menu, although the setting does appear to have changed when checking in the settings menu. The audio remains unchanged when changing the settings. However, when changing the same settings via the settings menu they function correctly (e.g. audio noticeably changes from loud to quiet after a few seconds).

Also, while displaying "debug info" on the wps, I noticed that %rg (replaygain value in dB) DOES change when the replaygain is changed via the shortcut menu, even though the audio doesn't change. (Both %rg and the audio change when the same setting is changed via the settings menu).

NB Some settings DO work, such as bass and treble.

Problem noticed on Sansa Clip Zip (build 2f1da04-120627), UiSimulator of Sansa Clip Zip (build fa17cb9M-120627).

Using r30284

Initialization of the database, from scratch, on the Fuze v2, using a fresh SVN build, fails when committing.

It scans all files, gets to committing 4/9, then hangs at “building database, N files found”.

If I reboot, it tries to commit on reboot, stops at 4/9, then boots into rockbox with no database (ie it asks me to initialize if I try to view it).

Attached are my database* files.

This is a bug in post-3.9 code, as I don’t have the problem with a 3.9 release.

Currently with r24775-100219 on a Gigabeat 20
Checked that it isn’t something to do with the HDD
sometimes after USB transfer or just right after startup, after pressing “Resume playback” it just halts there,showing the album art and sometimes you can change songs/volume but it isn’t playing,then it just freezes and you cannot control anything that needs to be turned off via power switch, and sometimes it requires certain trials before it can normally startup and play.
Additionally, if that happens during startup, it is noticeable that a normal startup produces sort of a background noise,while a buggy startup is simply silent in my headphone.

This may represent other players as well.

I installed a new battery on my iriver, a 2100 mAh that is working perfectly. The problem however, is that when fully charged, the voltage holds up to 4.12 volts, and until it drains to somewhere under 3.9 volts, Rockbox thinks that it is powered via USB, so naturally Rockbox gets stuck in USB mode until the battery is drained enough for Rockbox to realize that it IS a battery. With this problem at hand, I have to charge my iriver to only less than seventy percent of its battery life, or else wait for an hour or so to drain it to that point. I HAVE tested it in its original firmware, like I said, works perfectly. The problem lies with Rockbox thinking that the battery is a USB charger. I am asking for a fix around this. Is there a way that I can modify Rockbox so that it may understand that it is running off of a battery that will get up to 4.12 volts and not mistake that for USB power? I just now thought to turn off the “Charge During USB Connection,” maybe that will solve the problem; I will get back when I find out whether or not that works. However, I would still like to request a work around for this problem. Any help is much appreciated. Thanks.

When you play back a broken flac file (in this case a file that was truncated) it can happen that he decoder outputs constant loud noise instead of just skipping to the next track.

I’m not sure if this is really a bug since you are not supposed to play back broken files.

Attached is a file where this happens.

H300 r18009 (happens in the uisim too).

I’ve seen this bug on 3.9.1 and 3.10 on Sansa Fuze. If I set the language to Russian and connect the device to USB, I see a message consisting of squares with the only word “USB” being readable. Choosing another font in the settings makes no difference.

When the language is set to English, the message reads: “USB Keypad Mode: Multimedia”. However, the size and look of the font does not depend on the font selected in the settings. This is wrong.

If there is a real need in having a special font for the USB keypad mode text (which I doubt), that font should have glyphs for all supported languages.

%px tag does not behave properly with large files. When playback reaches the time 11:55:50, then the %px resets (starting to show 0).
It’s more extensively described here: http://forums.rockbox.org/index.php/topic,42661.0.html

There is different level audio between Radio and Music Playback with the same db value. Level audio on Music Playback is too low.

I’ve been using the latest dev builds everyday for iPod Nano 2G and still encountering “Swapped Channels” on Playback (e.g. Left Channel → Right Headphone / Right Channel → Left Headphone).

Used latest build 5785cfb-120625

Sansa Clip Zip has big problems with Lossless files. BIG.

1) Flacs skips randomly, at every encoding level (5 or 8 it's the same) and it's impossible to reproduce this issue when I want. It skips to the next track randomly
2) Ape files stops to reproducing and makes a really big noise, this after 30 sec. or 3 min… or nothing at all.
3) Wavpack files, sometimes, stucks for 0.5 seconds and then, it continues to play. It happens to Fast encoding, or Normal encoding, it's the same.
4) AAC files make little noises and, sometimes, crash Rockbox.

Flac and APE problems, I'm sure, occurs from ages, I bought Clip Zip months ago and these problem occurred for every build and ofr every Rockbox release.

I don't think that my player's broken. These problems were previously posted by other people.

I think that the testing of builds were made too hastily, there are too many problems with lossless files. I can understand APE that requires an expensive decoding, but FLAC files couldn't have these problems :(

Hi,

There is a compilation problem when the environment variable BLOCK_SIZE is set. It gave me errors about a comma.

This can be set or cleared systematically or on a command by command basis.

Suggestion one; unset BLOCK_SIZE and its relatives high in the build chain, but be prepared for POSIX to bite with 512 byte blocks.

Suggestion two; set LS_BLOCK_SIZE=1 high in the build chain. (And DF_BLOCK_SIZE=1024 and DU_BLOCK_SIZE=1024 ?)

Suggestion three; edit apps/lang/Makefile so that

$(SILENT)echo “#define MAX_LANGUAGE_SIZE `ls -ln $(OBJDIR)/* | awk ‘{print $$5}’ | sort -n | tail -1`” > $(HEADER)

becomes

$(SILENT)echo “#define MAX_LANGUAGE_SIZE `ls -ln –block-size=1 $(OBJDIR)/* | awk ‘{print $$5}’ | sort -n | tail -1`” > $(HEADER)

or

$(SILENT)echo “#define MAX_LANGUAGE_SIZE `LS_BLOCK_SIZE=1 ls -ln $(OBJDIR)/* | awk ‘{print $$5}’ | sort -n | tail -1`” > $(HEADER)

Suggestion four; just tell people that they are not allowed to have commas in their core utilities output (and be prepared to be bitten badly if the default block size ever changes).

BTW I *like* having thousands separators on my command line, so I have

export BLOCK_SIZE=\'1
export DF_BLOCK_SIZE=\'M

in my /etc/bashrc file.

This was reported in the past as part of another bug (FS #6707), and although the other one hasn’t happened anymore, this one still does.

Happens only from time to time. Scenario:

- player is playing song (in WPS), backlight off
- press stop
- only backlight goes on, playback continues

I attach this to H300 series but this may not be player specific

I am reopening  FS#11501  - Sansa Clip v2 FLAC playback skips regularly, which was closed because a sample file was not provided. I didn't think this was necessary because I stated it happened regularly with just about any file.

I am currently on build 30217. It skipped for me last night on this track:
http://www.archive.org/download/johnbutlertrio2011-07-24.lsdII.flac16/johnbutlertrio2011-07-24_lsdII_t07.flac

I cannot attach the track to this ticket because it is larger than 2mb.

Again, it is nothing inherent in that track: a second playthrough did not skip. That 16-bit/44.1khz track was generated with FLAC 1.2.1b using normal procedures.

This problem has occurred for any build I've ever tried on a clip v2 player.

Here is my original problem statement:

Build 27566 (and all previous builds), Sansa Clip v2.

playback of 16-bit/44khz FLAC format regularly will skip ahead to next track.

in a 60 minute playback session, it'll probably happen 2-3 times. this is not due to a defect in the FLAC files. it happens with any FLAC set I attempt.

this does not happen with the Clip v1 on the same build number.

this is my first bug submitted. I searched for duplicate reports but didn't find anything.

thank you!

This small patch adds a “jump to time” function to wps context menu. After clicking on jump 2 time item user, can specify time in mmmss format E.G:
- 130: jump to 1:30 in currently playing track
- 90: jump to 1:30 in currently playing track (shorter version of previous example)
- 1529: jump to 15:29
- 12345: jump to 123:45 (2 hours, 3 mins, 45 seconds)

I use it to easily transfer “last played position” time from computer to rockbox. Can be useful for audio books listeners.

This IS a duplicate of  FS#6904 .

My iaudio x5 hangs when changing directories via short+long direction button presses. It switches to the next directory, but no audio plays, and the WPS shows that it stops at 0:02 of the track.

This patch will correct how thai vowels and tonal makers display.

Patch changes controls for Doom:

Forward: rec/up
Left/Right: scrollwheel (it needs a lot of scrolls for large turns, but hopefully it can be modified to work better in the future)
Back: down
Shoot/Enter (menu): select
Change weapon: left
Open: right
Esc: power

All i know is that this happened on 590mb tta file and after cutting it with cue splitter there was no problems with playback.

SVN:31187

RB does not play AC3 tracks which were extracted from DVD with splitting one-track/one-song (splitting by chapters).

In other words - if you extract single AC3 song RB will not be able to play it back, despite the fact foobar2000 and Winamp with AC3Filter plugin will play it fine.

It is not a problem related to extracting software as the problem occurs for AC3 files saved by DVD Audio Extractor and SmartRipper. (Files saved by them are bit-bit the same as file comparison showed).

Simulator does not display any debugging info when you try to play AC3 file which RB is unable to play.

AC3 playback is not completely broken because RB plays AC3 files if you extracted full AC3 track without splitting it.

Create silence in Audacity program (Generate → Silence). Convert the wav file to ogg vorbis file. Put into the sansa clip+ player wav and Ogg files. Turn on the equalizer and set 32 hz, 64 hz, 125 hz in the 0.5-2.0.
Turn on maximum volume. Listen to the silence of wav file. Absolute silence. Listen Ogg Vorbis file - hear the noise (like the wind). It’s bug with only ogg vorbis. mp3, flac, mp4 is absolute silence.
On a musical files it’s additional noise. Ogg vorbis is economical of disk space. Testing on a sansa clip+ with 2GB.

So, when you compile and run the bootloader on VX767/VX757 or any other buttons-only model, it can only boot to the Rockbox or the OF. It cannot use USB mode or reset RB configuration.

Here is a patch.

So far there's still two problem which have never been fixed on Android:
1.When opening Rockbox, its volume bump to max automatically whatever it was when last quit;
2.On most HTC(and probably other) devices one can't use physical volume keys to adjust. Volume bars in WPS and SBS work well however.

Hopes the fixes!

  Nowadays there're more and more Android devices hit the market with higher and higher definetion. Therefore, we need to compile Rockbox with higher definetion.
  Though we can compile and run Rockbox fluently, it doesn't always work as we expected. Sometimes it can't load background image/WPS/SBS or it'll even stop singing. I did a lot of test and comparison between builds with different version and  definition and find out that it's the lacking of buffer which disturbs Rockbox working normally.
  Big tracks, images and WPSs/SBSs and maybe other can cause the buffer lacking. We have bigger and bigger RAM for apps now but Rockbox always can't get enough buffer to hold the data. Hope fix!

I downloaded this: https://www.youtube.com/watch?v=Lrb0dHKJBR4 using the youtube-dl python program. The file plays and seeks correctly in foobar2000 and MPC-HC. But, on my clip+, whether I seek 10 seconds or 10 minutes into the file, it ends up playing a position of the file previous to the one displayed. For example, if I seek 50 seconds forward from the beginning, it will play the file from the start, while the screen still displays as if it's playing from 50 seconds onwards. Seeking to the end of the file will have it play a section from about 2 minutes earlier than it should be, while the time display and music will continue until 1:14:20, with the file actually being 1:12:46.

I did not hear the files being played slower than they should be, so it seems it's only an issue when seeking.

I've confirmed this happens on every AAC file downloaded by youtube-dl, and that re-encoding the same file to AAC using NERO encoder makes the problem dissapear.

This patch modifies hardware registers for pclk & fclk in one instruction.

I’m currently testing it on Clipv2 to see if it gets rid of crashes

By default logf() will output to the serial port if that is enabled (HAVE_SERIAL). This is kind of distracting if logf() is used to debug serial communication itself.

The attached patch does the following:
- make logf() only output to serial if LOGF_SERIAL is defined (defaults to undef)
- adds an advanced configure option to enable LOGF_SERIAL

The patch is against r30429.