OpenAL - add native sound support - files attached needs review (03/04/2011)

[michaelvoliveira]

The latest version of OpenAL builds ok on Haiku

but lacks of a media kit backend

adek336 has said that is necessary construct a BSoundPlayer instance and pass an appropriate function as the PlayBuffer? argument. Later check for success with InitCheck?; later use Start to start SetHasData?(true) to signal readiness.
Your PlayBuffer? function will have to pass buffers of audio to the media kit and it will have to get the buffer from OpenAL.

Maybe sndfile-play-beos.cpp created by marcus overhagen ages ago may serve as example

[michaelvoliveira]

updated example.. actually it play sound!

[michaelvoliveira]

Getting the following output

BMediaEventLooper: SchedulingLatency is 750
BMediaRoster::Connect connection established!
BMediaRoster::GetParameterWebFor Unflattening 2946 bytes, 0x01030506, 0x00000001, 0x00000002, 0x00000003
BMediaRoster::ReleaseNode, trying to release reference counting disabled timesource, node 2, port 458902, team 39277
OpenAL backend info:
  Vendor: OpenAL Community
  Renderer: OpenAL Soft
  Version: 1.1 ALSOFT 1.12.854
  Available sources: 256
  Available buffers: 1024 or more
  Dynamic Sources: requested: 235, created: 235
  #static sources: 21
  #dyn sources   : 235

[michaelvoliveira]

Sources for David

[michaelvoliveira]

Patch file to enable g++ buildings with gmake. Introduced new Haiku Audio Functions. Adapted something from Solaris code. Being Mentored by David McPaul?.

[michaelvoliveira]

By the way, is not working yet

But already detects Haiku, and builds & runs fine

output sound is the way

[michaelvoliveira]

patch to allow builds with gcc4. Correct lib name

[michaelvoliveira]

patch to allow builds with gcc4. Correct lib name

[scottmc]

initial patch applied in r1039.

[scottmc]

Added a .bep file to build from git in r1040. Once you get a patch that gives working sound for Haiku using the git version let me know.

[scottmc]

patch from GCI student yeputons, to add native Haiku playback support

[michaelvoliveira]

AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

IT WOOOORRKSSS flawlessly.

THANK YOU YEPUTONS!!! Now we have native OpenAL support

Unfortunately, I took so much time to check this

And now only a version released at january is supported

it means that this patch don't play any sound into the current git repository (almost 4 months later)

But, we can live with it until somebody comes and update it

Many thanks!

[michaelvoliveira]

Some commentaries from OpenAL communith

KittyCat
* the probe function isn't setting anything and consequently, the open function is only accepting a NULL name
* and the ResetPlayback method needs to modify the ALCdevice with the parameters the player
* also, only the _init, _deinit, and _probe methods need to be global. all the rest can be static and don't need to be extern "C"
* alcGetString(NULL, ALC_DEVICE_SPECIFIER); returns a null-separated list of available devices
* it's usually used to display a selection to the user, and an app may assume only the devices returned by that are selectable

Well, but it's working :P

[michaelvoliveira]

More comments by KittyCat?:

Into HaikuResetPlayback:
* how it takes dev->UpdateSize, divides it by frameSize (with rounding up), then squaring it
* is fmt.buffer_size the total size of the buffer, or the size of each buffer update?
* try tracing, and see whatHaikuPlayBufferCb keeps getting called with for buf_sz

[michaelvoliveira]

.bep file for the final 1.13 version. Please note that current git versions aren't supported yet

[michaelvoliveira]

patch to enable native sound support for Haiku. Added David McPaul??? code to correct some deficiences from yeputons code, as appointed by KittyCat? from OpenAL community

[scottmc]

applied in r1651. Thanks.