Guys, I have bad expectations about battery runtime of Hxxx with RockBox.
All of you know, that the runtime is affected by the file type, and for OGG/Vorbis its less than for MP3. I think that iRiver's firmware is using very optimized decoders (and maybe at the prize of lower quality), and it's well known that Vorbis decoding needs more CPU power.
The problem is that i don't know whether the Rockbox team could manage to optimize the existing codecs to run at the CPU speed at which stock firmware runs. I don't think at all that you're not able to do it, but maybe it'll need a nearly _complete_ rewriting of codecs in 68K+EMAC asm, and the last is enormous work...
On the other hand, Rockbox has better hard disk spining/buffer management, which can raise the uptime...
Btw, did anyone have measured the difference in battery runtime of OGG/Vorbis and MP3 at about equal bitrate?
Also, does anyone knows at what speed the stock firmware is decoding Vorbis and MP3 (for particular bitrate)?
@Linus: I know that there are some battery tests (for measuring battery level). However, is there any data of "sumulation" of normal use ( spinning up disk, reading mp3(s) until buffer is filled, spin down, decoding them realtime (@ CPU speed enough to do it with optimized parts from preglow, but not @ 120MHz), till buffer is nearly empty, spinning again etc...)?
And, I don't want to forget to THANK to all Rockbox team for the EXCELLENT work
