Rockbox Development > New Ports
RockChip mp3/mp4 players
knob:
This works quite well for me, seems it would only need a proper bootloader to go from "unusable" to
"unstable" on my device.
The audio is quality is very good and I can navigate the menus well with the 4 keys
that work.
I do get choppy audio when I first go into the "Now playing" screen or change tracks there, but if I back out
into the browser again the audio is good, even transistion to the next track is smooth.
Hmm.. Now what is it about that "Now Playing" screen that causes the choppy audio?
wodz:
Thats surprisingly good news!!! Could you describe more precisely the steps to have smooth playback? The reasons which comes to mind is:
1) peak meater
2) sloooow lcd updates
regarding the buttons - you may investigate which port values are changing in System->Debug->View I/O ports screen and than hack button driver in firmware/target/arm/rk27xx/rk27generic/button-*
and key-action mappings in apps/keymaps/keymap-rk27xx-generic.c
And one more thing - what exactly is your player (or is this noname one?)
cheers
wo
saratoga:
--- Quote from: knob on September 29, 2011, 04:47:54 PM ---I do get choppy audio when I first go into the "Now playing" screen or change tracks there, but if I back out
into the browser again the audio is good, even transistion to the next track is smooth.
Hmm.. Now what is it about that "Now Playing" screen that causes the choppy audio?
--- End quote ---
The now playing screen updates a lot more frequently then the menus if I remember correctly.
knob:
My player is a no name like this, http://www.rockbox.org/wiki/pub/Main/Rockchip27xx/mp5_3.jpg
can’t remember now if it’s a Rk2705 or Rk2706, I shall have a look next time I open it up.
Players looking like this are for sale now, but using Rk261X (Rkcrown), which is very similar but using “RKCrownBoot.binâ€, I have one of these too.
The chop in the audio occurs about every 2 seconds.(0.5hz) , it happens in the “Now Playing†screen after I select a new track, if I exit from the “Now Playing†screen into the menu the audio is fine, it is also fine if I go back again into the “Now Playing†option until I skip to the next track.
If I keep out of the “Now Playing†screen and stay in the menus the audio is good always, even moving on to the next track and so on.
Does your device have choppy playback at all times? It could be that my device is close the threshold where this happens (which is lucky for testing purposes).
I have thought about applying a simple theme to disable the “Peak Meter†to see what happens
wodz:
isn't rk261x completely different SoC?
On mine 'noname RM970 clone' playback is always choppy. I think I'll go and implement lcd partial updates - this should at least change 'chop pattern'.
Do you understand by the chance how the whole LCDIF block is working? Running lcd in bypass mode and performing pixel conversion on every write is not the most effective way but I could figure out how to setup the hardware to do this for me.
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