[njbfs-commits] CVS: njbfs/docs towards-a-linux-kernel-audio-track-subsystem.txt,1.1,1.2

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Update of /cvsroot/njbfs/njbfs/docs
In directory usw-pr-cvs1:/tmp/cvs-serv23353/docs

Modified Files:
	towards-a-linux-kernel-audio-track-subsystem.txt 
Log Message:
'sscanf' missing symbol compatibility hack

Index: towards-a-linux-kernel-audio-track-subsystem.txt
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RCS file: /cvsroot/njbfs/njbfs/docs/towards-a-linux-kernel-audio-track-subsystem.txt,v
retrieving revision 1.1
retrieving revision 1.2
diff -C2 -d -r1.1 -r1.2
*** towards-a-linux-kernel-audio-track-subsystem.txt	2001/12/11 11:00:18	1.1
--- towards-a-linux-kernel-audio-track-subsystem.txt	2001/12/14 23:16:23	1.2
***************
*** 59,63 ****
  will always be the loser. This is where Linux starts.

- 
  2. Linux can offer the most effective MP3 portable device support

--- 59,62 ----
***************
*** 99,103 ****
  portable audio track device, this device could have superior
  connectivity and interoperability in comparison to other proprietary
! embedded systems.

  Independent software vendors can also be encouraged to develop software
--- 98,105 ----
  portable audio track device, this device could have superior
  connectivity and interoperability in comparison to other proprietary
! embedded systems. There has been some effort going on in the Embedded
! Linux MP3 Player Project [7] in 1999, where old PCs are used to build
! MP3 player hardware, but it would be a challenge to construct
! a real Linux MP3 portable device ready for mass production.

  Independent software vendors can also be encouraged to develop software
***************
*** 109,115 ****
  the open source audio kernel subsystem.

! 3. The basic design of a Linux kernel audio track subsystem

  In this section, the design of a Linux kernel audio track subsystem
  is being discussed.
--- 111,225 ----
  the open source audio kernel subsystem.

+ 3. Status of MP3 portable device support for Linux today

! In this section, the status of the Linux support for MP3 portable devices
! will be described. A lot of projects started years ago, but there
! has never been a framework as a basis for all the efforts. It would
! be reasonable to pick up the best from all these efforts in order to
! get a state-of-the-art audio track kernel subsystem.
! 
! Diamond Rio [1]

+ One of the first MP3 players, without harddisk.
+ The Diamond Rio 500 has 64 MB built-in flash memory, expandable with
+ SmartMedia cards, over 12 hours of continuous playback on 1 AA alkaline
+ battery, weighs 2.7 ounces, has a USB port connector for downloads,
+ and the functions repeat one track, all tracks, or random a customizable
+ EQ, and playlists.
+ 
+ Cesar Miquel <mi...@df...>, Keith Clayton <kcl...@jp...> and
+ Bruce Tenison <bte...@di...> have developed a set of drivers
+ and tools for the Rio 500.  There is also a Gnome-Rio GUI written by
+ Cesar Miquel and Till Harbaum.
+ 
+ A couple of Rio tools has been developed since 1999. Interestingly,
+ the developers had future plans about file systems, and loadable
+ modules. David Weekly has packaged The Snowblind Alliance's Rio Utilities
+ program which lets people use the Rio as a secure storage device [].
+ 
+ Personal Jukebox [2]
+ 
+ The Personal Jukebox (PJB) is a portable mp3 player with an IBM 6 GB,
+ 2.5 inch hard drive. It can store about 1500 mp3 songs, the equivalent
+ of about 150 cds. The Personal Jukebox was originally designed and
+ developed by the Compaq Computer Corporation's Corporate Research Labs.
+ The original Personal Jukebox came with a 4.8 GB hard drive.
+ 
+ Alexander Mosley (aj...@ne...) is working on a GNOME/Gtk+ GUI
+ Personal Jukebox Manager for Linux. This application has a
+ similar interface and functionality to the Windows 98 application
+ supplied with the Personal Jukebox. The latest release implements
+ all the vital functions. The Personal Jukebox is a USB device and
+ therefore requires USB support. The software runs on a small USB
+ kernel module based on 2.4.x kernels.
+ 
+ Archos JukeBox 6000 [3]
+ 
+ The Archos Jukebox 6000 comes with a USB interface. It has 4 x AA
+ rechargeable NiMH Batteries, the battery range is up to 8 hours.
+ 
+ The harddisk capacity is 6GBand the memory Buffer used is 2 MB.
+ It supports only MP3. Dimensions are 115 x 82 x 34mm (4.5" x 3.2" x 1.3")
+ The weight is 290g (12 oz.)
+ 
+ Since the Archos disk is mountable as a USB mass storage device,
+ there was a need of Linux support of USB storage adapter products.
+ The ISD-200 is a widespread ASIC USB to ATA adapter and part of the Archos.
+ Björn Stenberg (bj...@ha...) developed the Linux driver and it is now
+ part of the official Linux kernel. Because of this, there shoudn't be the
+ need of extra Linux software. The Archos find automatically all MP3 files
+ on the disk. Anyway, this means the audio track subsystem should be able to
+ find audio tracks automatically on connected devices.
+ 
+ Treó 10 [4]
+ 
+ The Treó 10 is a digital music jukebox with the capacity of 10 GB.
+ Made in the USA, the Treó 10 features an aluminum case, a rechargeable
+ lithium-ion battery and an LCD display.
+ 
+ It has a 10 GB embedded hard drive, supports MP3 and Windows Media files,
+ got a fully upgradeable firmware, USB interface,
+ e.Digital's Smart Song Selection,
+ Battery capable of playing for approximately 11 hours with a single charge
+ The capacity can be used to store and/or transfer data files as well as music.
+ 
+ It is unknown if there is special Linux software needed for the Treó.
+ 
+ Creative Nomad Jukebox [5]
+ 
+ The Creative Nomad Jukebox has a 20GB
+ storage space. The original came with 6GB. The weight is 14 ounces,
+ the USB interface enables file transfers, and the dual Stereo Line Out
+ support front and rear speakers. It has Creative's EAX, parametric EQ,
+ adjustable playback speed, and line-in for direct stereo audio recording
+ in WAV format from external devices. It has 2MB memory buffer for up to
+ 5 minutes of shock protection.
+ 
+ The OS is flashable and  extended features such as new DSP algorithms,
+ security features, auto play lists generators are planned, beside
+ SDMI support for accessing future label released SDMI compliant content.
+ 
+ John Mechalas (se...@ar...) implemented a Linux/FreeBSD
+ library for USB/NJB with a documentation of the NJB USB protocol
+ at http://libnjb.sourceforge.net
+ 
+ Neo Jukebox 2200 [6]
+ 
+ The Neo Jukebox has 10, 20+ GB hard disk and supports .mp2; .mp3 file
+ types, and .m3u playlists. The MP3 files can have 8-320 Kbps bitstream
+ rates, and VBR is supported. The connection is USB. The firmware can be
+ flashed. The buffer size is 2 MB, that is 40 seconds of constant play time.
+ It weighs 7.7 oz. / 218g (without battery & HDD)
+ The dimensions are 142.5 x 120.8 x 27mm (5.5" x 4.7" x 1.1").
+ The size of the LCD is 64 x 128 pixels (56 x 32 mm) and is backlit.
+ The rechargeable Lithium-Ion battery specification is 3.6V 1500mA/H,
+ that gives 4 hours.
+ 
+ It seems that the Neo Jukebox is a USB mass storage device, much like
+ the Archos. For this, no extra Linux drivers seem to be required.
+ 
+ 
+ 4. The basic design of a Linux kernel audio track subsystem
+ 
  In this section, the design of a Linux kernel audio track subsystem
  is being discussed.
***************
*** 157,160 ****
--- 267,277 ----
  The audio track subsystem uses a system-wide configuration.

+ Since currently there is a lack of support for flash memory and drivers,
+ the most promising approach to a common audio track system will be
+ the support of MP3 portables with USB equiped with disks that can be
+ configured using standard file systems. If flash memory or other memory
+ systems for portable memory are supported by Linux, there should be
+ no problem to build audio track driver for more MP3 portable devices.
+ 
  The following Linux resources will be very useful for the audio
  track subsystem:
***************
*** 200,202 ****
  device capabilities completely.

! (to be continued)
--- 317,347 ----
  device capabilities completely.

! 
! 
! Resources
! 
! [1] The Linux Rio500 kernel driver: http://rio500.sourceforge.net
! The Snowblind Alliance has closed down their activities due to the DMCA:
! http://www.world.co.uk/sba/rio.html
! Snowstar Tcl&Tk interface for Rio:
! http://www.daft.com/~armadilo/projects/snowstar/snowstar.html
! David Weekly's RPMs for Rio v1.06: http://david.weekly.org/code/
! 
! [2] The Personal Jukebox: http://www.pjbox.com
! Linux driver: http://www.mews.org.uk/pjb
! 
! [3] Archos JukeBox 6000: http://www.archos.com/us/products/product_500096.html
! Linux ISD-200 USB-to-ATA driver: http://bjorn.haxx.se/isd200/
! 
! [4] Treó 10: http://www.treoplayer.com
! 
! [5] Creative Nomad Jukebox: http://www.nomadworld.com
! NJB Library for Linux/FreeBSD: http://libnjb.sourceforge.net
! 
! [6] The Neo Jukebox 2200 (USA): http://www.ssiamerica.com/products/neojukebox/
! IOMagic page: http://www.iomagic.com/products/neo-index.htm
! 
! [7] The Embedded Linux MP3 Player: http://zephyr.unl.edu/~spawn/elmp/
! 
! [8] Yahoo MP3 portables discussion groups:
! http://dir.groups.yahoo.com/dir/Computers___Internet/Hardware/MP3_Players