[AudioEngine] Support for AE on Windows platform

I'm going to have to go back to Alpha3 as well.

In Alpha4 the audio works for a few seconds but is crackling a lot, and then XBMC becomes unresponsive and the audio is stuck looping.

Here's the log, https://dl.dropbox.com/u/41720073/xbmc.log

(2012-08-13 09:32)ace20022 Wrote:  @davilla

As you suggested, I had a look at the WASAPI. It states that the latency retrieved by GetStreamLatency(...) is expressed in 100-nanosecond units.(GetStreamLatency).

In the current code there is comment that GetCacheTotal() returns a duration in seconds, the conversion is done by

Code:

/** returns buffer duration in seconds */
  return hnsLatency / 10.0;

In my opinion the correct conversion is

Code:

/** returns buffer duration in seconds */
/** hnsLatency is given in 100 ns steps, conversion to seconds:  div by  10000000*/
  return hnsLatency / 10000000.0;

I successfully played two flac files, but had no time to test more.

EDIT: In the meantime I had. The access violation still persists. Now it happens within minutes rather than seconds. However, the above is valid, I think.

ace

@ace - you are mostly correct - the return value is in 100ns units, and the conversion to seconds does require that division. My dev branch includes that fix and one more: the result should be multiplied by 2x as there are actually two buffers of that duration which are filled prior to playback actually starting - this is contrary to Microsofts' descriptions on MSDN, but I have verified it via a somewhat complex tracking of the actual hardware buffer pointers with other development code. Further comments & details on GitHub in the PR mentioned above.

Welcome back DDDamian

DDDamian... great to see you back in rotation! Hope you had a nice break.

Cheers

Hi DDDamian,

I will post a reply in the dev thread, since I moved to it from post #624 on.

ace

Hey folks,
Its been quite a while since i have attmpted to upgrade beta versions for AE support (I need the new codecs to play back). My current version is a June build (6/6/12) or so and around then I tried several other versions with little success. Can you guys point me to a stable build? I honestly only stream mkv and iso blu ray files through xbmc and nothing else...very simple user

Thanks!

(2012-08-15 23:49)bigbwb Wrote:  Hey folks,
Its been quite a while since i have attmpted to upgrade beta versions for AE support (I need the new codecs to play back). My current version is a June build (6/6/12) or so and around then I tried several other versions with little success. Can you guys point me to a stable build? I honestly only stream mkv and iso blu ray files through xbmc and nothing else...very simple user

Thanks!

Frodo Alpha 3 - http://mirrors.xbmc.org/snapshots/win32/...alpha3.exe

[/quote]

Frodo Alpha 3 - http://mirrors.xbmc.org/snapshots/win32/...alpha3.exe
[/quote]

So this link is to a regular non beta release? Sorry I am fairly new to xbmc. All I had found was the AE nightly builds prior, and these are the ones that gave me trouble.

Thanks.

The link is a "snapshot".

Taken from the wiki...

"Monthly builds are semi-stable nightly snapshots of pre-release builds.
XBMC developers have a merge cycle every month for new features and major changes. For one week they add new features, then for three weeks they fix things. The monthly is then taken from a nightly just before they start adding features again."

Thanks^^^^
I'll give it a try!