[Openal] Problems with streaming

[Jeremy Henry]

Dan,
I am using 32768 buffers so I am definately 4 byte aligned.


From: Daniel PEACOCK <dpeacock at creativelabs.com>
To: openal at opensource.creative.com
Subject: Re: [Openal] Problems with streaming
Date: Mon, 19 Jun 2006 09:27:39 -0700





Hi Jeremy,

Thanks for the additional information.   The alBufferData function will set
an AL_INVALID_VALUE error condition if you do not pass in a block-aligned
amount of data ... e.g if you are playing stereo 16 bit audio, you need to
pass in a multiple of 4 bytes.   Can you verify that you are doing this ?

Thanks,

Dan

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              "Jeremy Henry"
              <jeremy_h at hotmail
              .com>                                                      To
              Sent by:                  openal at opensource.creative.com
              openal-bounces at op                                          cc
              ensource.creative
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                                        Re: [Openal] Problems with
                                        streaming
              06/19/2006 07:39
              AM







Thanks for reply Dan,
I've been out of touch all weekend just moved and until tonight no
internet.
   By getting stuck I mean it will play through all the buffers I would
create and then get caught on playing only the last buffer playing the same

data over and over.  I am running this in Windows XP and I am just using
the
basic OpenAL SDK so no 'device' if thats what you mean.  How would I check
for buffer starvation too?  I have been analyzing the problem and I get
back
the error code a003 (AL_INVALID_VALUE) when I try to add a new buffer to
the
stream.  Now I know that the size parameter and data are not null so the
buffer must still be thought to be in use.  Shouldn't the
alSourceUnqueueBuffers function release that buffer from the source?  As
you
see in the update function I immediately try to fill the buffer I unqueue
but I will get the error message.  I did a little bit of a hack to only
queue up all the buffers once as I do in the playback function with a
'static bool bOnce' hack and in that case it will play through the entire
track but it is very skippy still getting the a003 message until all the
buffers have played then it fills each one.  Hopefully all this makes some
sense but I will try to clarify anything if I can.


From: Daniel PEACOCK <dpeacock at creativelabs.com>
o: openal at opensource.creative.com
Subject: Re: [Openal] Problems with streaming
Date: Fri, 16 Jun 2006 14:37:46 -0700





Hi Jeremy,

I didn't see any obvious problems in the code ... except that you are not
checking for buffer starvation (i.e you are assuming the Source always has
enough data queued on it).

What OS are you using ?  And if appropriate, what OpenAL device ?

I'm not sure what you mean by "gets stuck on playing the second buffer" ...
do you mean that you don't hear the 2nd buffer, or the 2nd buffer is never
processed, or something different ?

Thanks,

Dan

Notice
The information in this message is confidential and may be legally
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unlawful.  If you have received this message in error,  please delete it
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              "Jeremy Henry"
               <jeremy_h at hotmail
               .com>                                                      To
               Sent by:                  openal at opensource.creative.com
               openal-bounces at op                                          cc
               ensource.creative
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                                         [Openal] Problems with streaming

               06/16/2006 10:32
               AM







I have the code compiling and running without crash the music even sort of
plays.  The problem is that the first buffer that is loaded plays and then
it gets stuck on playing the second buffer.  Here is a link to a post a
made
for easier viewing of the code.  Also is there a channel in irc that I
could
go for real-time help?
Thanks,
Jeremy

http://www.devmaster.net/forums/showpost.php?p=34918&postcount=74


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