Since midterm I have been working on the jsound port, which provides audio, MIDI input/output and the ability to control mixer volume and other parameters.
After getting my head around some of the media kit concepts the implementation has gone smoothly. I implemented audio output support first, as I guessed this would be the most used component. It works well. Then I implemented MIDI input and output support. This is untested so far because I don’t have any MIDI hardware. In the end I will probably end up constructing some dummy MIDI endpoints in another app for rudimentary testing. Audio input support is awaiting the availability of the SoundConsumer class, which might be included as a private API in libmedia, as the file cannot be included in OpenJDK because of licensing restrictions. Once this is in place I’ll get working on the audio input support.
I began to implement the acpi cpuidle driver so that the power saving feature can benefit all x86 platforms(In theory although). The acpi is more complicated than I thought. The main time is spent on implementing “_CST” evaluation and decoding.
First of all, to evaluate any acpi object/method needs acpi handle. Since haiku doesn’t export AcpiWalkSpace method of acpica, so after system booting, I can get the acpi processor handle. the only solution is using the device manager so that the acpi cpuidle driver can be loaded during boot. This requires cpuidle modification so that generic cpuidle module is loaded by low level idle driver. The modification is not done because it’s simple and I want to get “_CST” evaluation done firstly.
I have continued to make good progress since my midterm report. All the kernel functionality except for user debugging is implemented, and I have ported a basic set of drivers, including PCI, disk drivers, BFS and PS/2 input. For most drivers, porting is just a matter of fixing compiler warnings. For some, there are 64-bit issues which make porting more difficult. For example, the USB stack will require a bit more work as it currently assumes that addr_t is 32-bit everywhere.
I have also made some progress in porting userland to x86_64. I currently have libroot, libbe, bash, and most of the command line utilities ported. I have got an interactive bash shell running on top of consoled (which is usually used to run gdb on if app_server crashes).
Last week Olivier and I had the difficult task of handling the booth at RMLL and showing off Haiku in the land of gruyère, chocolate and banks.
Over the weekend, Google processed the results for the midterm evaluations for Google Summer of Code 2012. I’m pleased to announce that all five students passed their midterm evaluations! As you may have seen, the students have been posting details on their progress and future plans on their blogs. Last month, two students even gained commit access. Alex Smith received it for Haiku’s repository and Hamish Morrison received access to OpenJDK. Congratulations everyone and keep up the great work!
After my quarter term report I worked on various bugs in the AWT port reported by testers, such as keyboard input problems. I also began reading up on the media kit in preparation for the next part of my project: the jsound port. This will bring audio and MIDI functionality to the OpenJDK port. Over the last week I made a start on the implementation for PCM input/output.
A lot of things have happened since the last status update! As far as I
can tell, the kernel part of the file system resizer is mostly complete.
Some details remain, along with a healthy dose of bugs to be fixed. In
addition, I've written a 'resizefs' command for bfs_shell. Let's look at
a typical session with the mighty resizefs!
fssh:/> resizefs 100
File system information:
Bitmap: 1 blocks (was 1)
Log start: block 2 (was 2)
Log length: 512 blocks (was 512)
Block size: 2048 bytes
Error: Not enough space left.
Status: Invalid argument
Hello Haiku world,
Given my lack of updates lately I have decided to give some official update on my work here, and at last leave some overview documentation so any newcomer could have an easier startup.
Note that I have been and I will be: around, open reply questions and offer all support I can this is not a farewell!
Thank you all for this period of life.
Having implemented mandatory hooks by quarter term I had good base for implementing other operations like write, rename, create, etc. Moreover, improvements in file system migration and user ID mapping. Apart from that, file locks required most work, since they are both more complicated than other NFS operations and Haiku VFS originally did not allow the file system to handle them its own way.
With the good preparation in quarter term/bonding period, I have completed the generic cpuidle kernel module, native intel cpuidle module and cpuidle driver(for states/info reporting). By original plan, these tasks will be all completed by the end of 3/4 term…
