Rockbox

Dynamic Play Queue

I have added a dynamic play queue feature to rockbox
and here is how it works:

- If an mp3 file is selected in the dir browser it can be
added to a queue list in RAM by pressing and holding the
PLAY button. On the recorder this can also be done with
the RIGHT button. If the first song is selected this way
the playlist is switched to “queue mode”.

- After queueing a song Rockbox does not go to the wps
screen as usual. Instead the dir and filename of the song
is displayed for two seconds, then the dir browser
continues.

- If a song is currently playing when queue mode starts
it will continue to play and also be added as the first file
in the queue. The file selected in the browser will be
added as the second file.

- More songs can be queued until the current playlist
limit of 400 songs is reached or the buffer for the
filenames is full. In that case the “buffer full” message is
shown.

- The queue can be walked using the PREV/NEXT button
on the wps. If repeat is off playing stops at the end of
the queue. Otherwise the queue will be played again
from the start.

- If playing is stopped from the wps Rockbox goes back
to the browser but queue mode is not cancelled and the
queue list remains also intact. When the next song is
queued it is added to the end of the list and played.

- Queue mode is canceled when the OFF button is press
in the dir browser or when a song is select with a short
press on the PLAY button. This will also delete the queue
list.

- The shuffle mode is deliberately ignored. Songs are
always played in the order they are added to the queue.

What is missing:

- There should be an icon to show when queue mode is
on, but the status bar is full. The easiest way to get
around this is to add the list index (%pp) and the total
number of songs on the list (%pe) to the wps. Try “%s%
pp/%pe %fp” as the first line in your default.wps file
(without the quotes).

- As of this writing Rockbox can not write files to the disk
so there is no way to save the queue list. Consequently
there is no way to resume on power-on.

File list:

Included with this patch are diff files for main_menu.c,
playlist.h, playlist.c and tree.c. They are all located in the
apps dir.

Please note: I am not familiar in any way with linux or
diff files. These diff where made using WinCVS and I
hope there are in the correct format. In case there is a
problem I have also included the .c files so you can
make you own diffs against the current CVS versions.

You may want to give the queue feature a try but don’t
have the time now to apply the diffs. Therefore I have
also included a ajbrec.ajz file based on the CVS version
at 4pm on 2002/10/05.

Regards,
Django

(in real life: Wilhelm Schroeder)