Any integer lossless encoder to fit "iRockbox"?

Any integer lossless encoder to fit "iRockbox"?, A suitable lossless encoder for Rockbox?

Tang View Member Profile	Feb 12 2005, 20:44 Post #1
Group: Members (Donating) Posts: 158 Joined: 27-January 04 Member No.: 11536	Hello, As some may know the Rockbox iRiverport for iHP1xx is on his way thanks to LinusM releasing his precious "bootloader"... Actually the team is concentrating his work on the AUDIO part... The great priority of course is decoding (especially MP3 even if a lot of audio codecs are in the TODOlist!) Anyway the team have made some searchs for encoding part and they complaining they don't find much things that seems suitable for the iRiverport since they need INTEGER encoders that won't overdrive the iHP processor... So i've asked on the HA "rockbox iRiverport" thread for LOSSY integer encoder with Open-source license of course (check HERE)... As there is a lossless section i make this thread to ask the same thing but for an interger lossless open source encoder! I will be very kind of you to put all information you know about such an encoder! Thanks, Tanguy This post has been edited by Tang: Feb 12 2005, 20:48

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Twinsen View Member Profile	Apr 12 2005, 14:35 Post #2
Group: Members Posts: 1 Joined: 11-April 05 Member No.: 21382	Hi! Actually there is a really fast free (non-commercial) mp3 encoder. I tested it on Intel XScale PXA255 @400MHz, 100MHz 32bit SDRAM. This processor is quite common in PDA's, and has no floating point unit! It took 40sec to compress 60sec audio, so it works real time. Input: 44100Hz 16bit stereo Output: 128kbps 44.1KHz mp3 The encoder is the sample mp3 encoder for the Intel Performance Primitives (IPP) library. It can be freely downloaded from intel's website!

rjamorim View Member Profile	Apr 12 2005, 16:22 Post #3
Rarewares admin Group: Members Posts: 7515 Joined: 30-September 01 From: Brazil Member No.: 81	QUOTE (Twinsen @ Apr 12 2005, 10:35 AM) The encoder is the sample mp3 encoder for the Intel Performance Primitives (IPP) library. It can be freely downloaded from intel's website! I'm afraid that encoder is incompatible with the GPL, therefore it would conflict with the rest of the RockBox code. Also, I would suspect it's not optimized at all for M68K. This post has been edited by rjamorim: Apr 12 2005, 16:24 -------------------- Get up-to-date binaries of Lame, AAC, Vorbis and much more at RareWares: http://www.rarewares.org

Tang View Member Profile	Apr 12 2005, 16:30 Post #4
Group: Members (Donating) Posts: 158 Joined: 27-January 04 Member No.: 11536	QUOTE (rjamorim @ Apr 12 2005, 07:22 AM) QUOTE (Twinsen @ Apr 12 2005, 10:35 AM) The encoder is the sample mp3 encoder for the Intel Performance Primitives (IPP) library. It can be freely downloaded from intel's website! I'm afraid that encoder is incompatible with the GPL, therefore it would conflict with the rest of the RockBox code. Also, I would suspect it's not optimized at all for M68K. MMM indeed if it isn't GPL compatible it's a fatal issue.. The non optimisation should not be a real matter since there is no mp3 integer encoder optimized for M68k... Cheers Roberto

rjamorim View Member Profile	Apr 12 2005, 16:36 Post #5
Rarewares admin Group: Members Posts: 7515 Joined: 30-September 01 From: Brazil Member No.: 81	QUOTE (Tang @ Apr 12 2005, 12:30 PM) MMM indeed if it isn't GPL compatible it's a fatal issue.. Intel is delightfully vague on that subject http://www.intel.com/software/products/noncom/faq.htm QUOTE Q. If I use the non-commercial product to build my product, can I open source it? A. The FAQ for GNU GPL has information related to this question. Please refer to the GNU website "Frequently Asked Questions about the GNU GPL" at: http://www.gnu.org/licenses/gpl-faq.html For further clarification, please contact the Free Software Foundation at: [...] -------------------- Get up-to-date binaries of Lame, AAC, Vorbis and much more at RareWares: http://www.rarewares.org

Posts in this topic

Tang Any integer lossless encoder to fit "iRockbox"? Feb 12 2005, 20:44

rjamorim All lossless encoders use integer math only. They ... Feb 12 2005, 23:01

Tang QUOTE (rjamorim @ Feb 12 2005, 02:01 PM)All l... Feb 12 2005, 23:14

HotshotGG QUOTE (rjamorim @ Feb 12 2005, 02:01 PM)No ot... Feb 13 2005, 01:00

rjamorim QUOTE (HotshotGG @ Feb 12 2005, 10:00 PM)What... Feb 13 2005, 01:02

HotshotGG QUOTE We are talking about encoders, sire Ahh.. O... Feb 13 2005, 01:04

Tang QUOTE (HotshotGG @ Feb 12 2005, 04:04 PM)QUOT... Feb 13 2005, 01:09

emtee It'd also be nice to point the rockbox team to... Feb 13 2005, 03:24

jcoalson (minor correction, lossless encoders can use float... Feb 13 2005, 10:38

Tang QUOTE (jcoalson @ Feb 13 2005, 01:38 AM)(mino... Feb 13 2005, 17:43

rjamorim Oops. I stand corrected. Feb 13 2005, 12:58

Twinsen Hi! Actually there is a really fast free (non-... Apr 12 2005, 14:35

Tang QUOTE (Twinsen @ Apr 12 2005, 05:35 AM)Hi... Apr 12 2005, 16:11

rjamorim QUOTE (Twinsen @ Apr 12 2005, 10:35 AM)The en... Apr 12 2005, 16:22

Tang QUOTE (rjamorim @ Apr 12 2005, 07:22 AM)QUOTE... Apr 12 2005, 16:30

rjamorim QUOTE (Tang @ Apr 12 2005, 12:30 PM)MMM indee... Apr 12 2005, 16:36

handy_man_dan QUOTE (Twinsen @ Apr 12 2005, 07:35 AM)Hi... Jun 22 2005, 05:29

Tang Eh eh very sympathetic as a perfect "langue-d... Apr 12 2005, 16:40

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