Difference: IpodStatus (r62 vs. r61)
Revision r62 - 23 Nov 2007 - 02:24 - HarrisonTu
Rockbox Status for Ipod Models
Overview of iPod ports
The following table summarizes the status of Rockbox on the various iPods.
| 1st and 2nd Gen. || Rockbox works nicely, but more work is needed on these ports. No official bootloader yet due to missing suspend implementation. |
| 3rd Gen. || Rockbox works including audio playback, but some of the audio codecs are too slow to decode in realtime - causing skips during playback. Thanks to the recent inclusion in SVN of the following patch: FS#6705 - - Small ARM optimizations to MPA codec, mp3 playback is now real time. Work is still being done to optimize Rockbox for the 3G iPod and bring it up to speed with the other versions. Keep checking back to see its progress. |
| 4th Gen. Grayscale || Most (but not all) Rockbox features and plugins are working, but there are still a small number of important features unimplemented. |
| 4th Gen. Photo/Color || Most (but not all) Rockbox features and plugins are working, but there are still a small number of important features unimplemented. |
| Mini 1st Gen. || Rockbox works with audio playback, but some more optimization is still needed. |
| Mini 2nd Gen. || Port is being actively optimized - Rockbox works quite nicely and plays audio. |
| Nano 1st Gen. || Previously stable, current builds (builds after SVN version 14003) have problems on some players see [[http://www.rockbox.org/tracker/task/7510?histring=nano[ FS#7510]] for more details. |
| Nano 2nd Gen. || Not Supported - the 2nd Gen Nano has completely different hardware to the other iPods (requiring a brand new port) |
| Nano 3rd Gen. || See above. |
| 5th Gen. (Video) || Very stable. |
| 5.5th Gen. 30 GB (Late 2006 Video) || Works as well as any other, so long as the new installation guide is used. |
| 5.5th Gen. 80 GB (Late 2006 Video) || Works as of 23 May 2007. More work on optimising the disk writing code is needed. |
| 6th Gen Classic || Not supported. The 6th Gen Classic has completely different hardware compared to the other "classic" iPods, requiring a new port. |
Known issues (1G-3G models)
%W% USER FEEDBACK NEEDED : Rockbox works with audio playback on the 3G iPod, but is still far behind the other iPod versions - please post your experiences here.
3G Ipod, 15GB -- MichaelMoore? - 15 Sep 2007
- Ogg is playing fine. Haven't played with mp3s yet.
- Using Banshee under Ubuntu Gutsy Linux allows me to use USB Mass Storage mode
3G Ipod, 20GB
- FLAC: All good (cpu at 30MHZ mostly), compression level 8
- MP3 (192kbit/s) : Occasional buffer underrun (a few times per song), cpu at 75MHZ
- OGG (500kbit/s): Constant buffer underrun (every 10 or so seconds), cpu at 75MHZ
- SCROLL: sometimes unresponsive, most of the time sluggish when playing. Not sluggish when stopped (I believe this probably due to to the CPU usage.
- SHUTDOWN: Doesn't work, will lockup with "shutting down" message
- USB: Not detected, will not go into "disk mode" as other ipod (tried 5th gen) do. Only way to transfer files is to boot into apple firmware and connect it to computer then.
- LOCKUP: Will lockup randomly, This has been experienced with FLAC playback so far.
3G iPod, 40GB (-- PhilippeBoineau - 07 Mar 2007)
- FLAC : ok (FLAC 1.1.4, compression level 8)
- Shutdown problem (since daily build 20070222)
- LOCKUP : iPod 3G randomly lockup during FLAC playback.
Known issues (4G models and higher)
The following table lists the known bugs and unimplemented features of the iPod port. Please do not add generic Rockbox bugs here.
|Description of bug||Affected iPods||Comments|
| Battery life is significantly less than the Apple firmware || All but 1st...3rd Gen || The power consumption problem has not been fixed on other models. See IpodRuntime|
| I hear skipping when playing some audio files || All || This is due to the CPU not decoding the audio track fast enough. The solution is to optimise these codecs to decode more efficiently and/or start using the iPod's second CPU for some tasks. See Audio Codecs Current status|
| The UI sometimes becomes sluggish || All || CPU intensive tasks such as audio decoding, running plugins and using the software EQ can cause the UI to become sluggish. Ways to minimise the effect of this are being investigated. |
| Remote Control doesn't work || All || The iPod serial interface has not been ported from iPodLinux yet. The platform-specific serial communication protocol, Apple Accessories Protocol, is now well documented. |
| Click Wheel not fully implemented || All || No click sound played when click wheel is used. |
| Occasional Freezes || Photo,4g,mini || System needs rebooting every once in a while. This occasionally happens with the 5G/5.5G video as well. |
The following table lists the outstanding tasks remaining before the ipod port of Rockbox can be considered complete. The "Assigned to" column indicates the names of developers who have expressed an interest in working on this feature.
|RoLo|| Buggy ||RoLo does not currently restart the coprocessor properly. Separately to this, RoLoing the original firmware does not work ||DanielAnkers / DaveChapman|
| Recording || In progress || Basic recording functionality (line-in and mic on the 4g and Color/Photo, line-in only on the 5g) is working and is in CVS but is missing important features such as gain control and selection of different samplerates. The current code also breaks playback after a recording is made. || |
| COP Usage || Codec Implemented on COP || Currently playback has not been helped as much as would have been hoped by COP usage |
| Battery Life || Not started || When running Rockbox, the iPods have a greatly reduced runtime (see IpodRuntime) compared to the original firmware. This can partially be solved by further optimisation of the Rockbox code (meaning that Rockbox can spend more time with the CPU running at a lower speed), but there are probably parts of the hardware which could be put to sleep to further save power. || |
| Accessory Support || Not started || A low-level serial port driver is in the IPL source, but this is known not to work. This driver needs to be fixed before the high-level Apple Accessory Protocol can be implemented. || |
| DMA || Not started || The PP502x contains DMA hardware, but it is not known how this works. || |
| USB Disk Mode || Not started || Rockbox currently reboots into Apple's "emergency disk mode" when a USB connection is detected. Ideally this should be replaced by a native disk mode in Rockbox. Some very early work has been done on using the USB || |
| Firewire support || Not started || All iPods apart from the Nano and 5g can act as external firewire hard drives, and all ipods can charge via firewire. Currently Rockbox doesn't have any specific support for firewire connections, but the hardware charges via firewire automatically. || |
| Better wheel support || In progress || Rockbox currently only has a very basic driver for the scroll/click-wheel. An improved driver with support for wheel acceleration is available in the patch tracker see FS#7738 - Scrollwheel acceleration for iPOD (ported from Sansa)(this patch has been committed to svn) for more details. || |
| Flash support || Not started || All iPods have a 1MB flash ROM containing the Apple bootloader, the emergency disk mode application, and the diagnostics mode application. Replacing this code would allow far faster booting time into Rockbox, and the option to the run RomBox (Rockbox running directly from flash). However, doing so would require Rockbox to fully initialise the hardware on boot (it currently relies on some initialisations performed by Apple's bootloader) and failed flashing attempts would result in a bricked ipod. See IpodFlash. || |
| Greyscale library || In progress || On the non-iPod targets with mono or greyscale LCDs, Rockbox has a "greyscale library" capable of displaying more than the native number of shades of grey on the LCD. Porting of this library is required in order for the JPEG viewer, some demo plugins and Doom to run on those iPods. || |
| TV-Out (Photo/Color) || Not started || The Photo/Color iPods have a TV-Out capability (a third ring in the headphone socket). It is unknown how to control this hardware, but the ipodlinux wiki states that these iPods contain an Analog Devices ADV7179 NTSC/PAL Video Encoder. || |
| TV-Out (5g) || Not started || The 5g also has a TV-Out capability, but this is likely to be different to the Photo/Color and connected directly to the Broadcom chip to allow video playback. || |
| 5g Broadcom chip || Not started || The 5g iPod has a Broadcom BCM2722 video decoder/processor which is used for video playback. Rockbox currently makes no use of this chip. || |
| 3g USB || Not Started || The 3G ought to have the same USB behaviour as later generations (i.e. reboots into disk mode on USB insert.) || |
Revision r61 - 20 Oct 2007 - 16:18 - DouglasValentine
Copyright © by the contributing authors.