extrait de son commentaire sur pourquoi OSS4 est mauvais selon lui:
OSS4 does a lot of signal processing (resampling, mixing) in the kernel. That is a big no-no, it's verboten in the Linux world. The kernel is supposed to include drivers, not processing algorithms. In its current form OSS4 would have exactly zero chance to even be considered by the Linux kernel people. If you'd rip out all the mixing, resampling, conversion, remapping then not much would be left of OSS4, except that a slightly updated OSS3 API. Then, the driver support in ALSA these days is actually much better than OSS4 since a lot of hw manufacturers nowadays work with the Linux community to improve the in-kernel drivers. OSS4 doesn't have that advantage. The ALSA people work well together with the rest of the kernel people, the OSS people absolutely don't. Then, the fact that the OSS API is a kernel API is one of the biggest issues, due to its ioctl-caused awkwardness and the impracticability to virtualize. It's also not extensible. Let's say I wanted to add DRC to the mixing code: I'd have to code that in kernel space -- and floating point calculations aren't even allowed in kernel space! It's just the wrong place to do these processing tasks in the kernel. Also on Linux interfacing with FireWire or Bluetooth audio happens in userspace and can thus never be covered by OSS4. And let's not even touch RAOP or UPnP audio devices! And this list goes on and on and on. There are so many fundentamental issues with OSS, it's an endless list. OSS4 is not just the worse system, it's a fundamentally wrong system. (At least on Linux. On niche Unixes different requirements apply)
[^] # Re: OSS4 la solution ?
Posté par Troy McClure (site web personnel) . En réponse au journal [:mmmfff]. Évalué à 10.
http://0pointer.de/blog/projects/guide-to-sound-apis
extrait de son commentaire sur pourquoi OSS4 est mauvais selon lui:
OSS4 does a lot of signal processing (resampling, mixing) in the kernel. That is a big no-no, it's verboten in the Linux world. The kernel is supposed to include drivers, not processing algorithms. In its current form OSS4 would have exactly zero chance to even be considered by the Linux kernel people. If you'd rip out all the mixing, resampling, conversion, remapping then not much would be left of OSS4, except that a slightly updated OSS3 API. Then, the driver support in ALSA these days is actually much better than OSS4 since a lot of hw manufacturers nowadays work with the Linux community to improve the in-kernel drivers. OSS4 doesn't have that advantage. The ALSA people work well together with the rest of the kernel people, the OSS people absolutely don't. Then, the fact that the OSS API is a kernel API is one of the biggest issues, due to its ioctl-caused awkwardness and the impracticability to virtualize. It's also not extensible. Let's say I wanted to add DRC to the mixing code: I'd have to code that in kernel space -- and floating point calculations aren't even allowed in kernel space! It's just the wrong place to do these processing tasks in the kernel. Also on Linux interfacing with FireWire or Bluetooth audio happens in userspace and can thus never be covered by OSS4. And let's not even touch RAOP or UPnP audio devices! And this list goes on and on and on. There are so many fundentamental issues with OSS, it's an endless list. OSS4 is not just the worse system, it's a fundamentally wrong system. (At least on Linux. On niche Unixes different requirements apply)