How do command an SGI Onyx2 to continuously play an audio loop? I see how you read and write marker and loop data to and from an audio file (aiff-c files) through the "af" library calls. What I don't understand is how to actually play a loop with the "al" library calls.
Robert, Not really relevant to this group, but anyway... I assuming that the sound you have is a loopable sound - i.e. there are no discontinuities between the end of the file and the start if looped. Test this using "soundeditor" - it has a loop function. If the file is short, you could just read the whole lot into a buffer. Alternatively just continuously reread the file (just seeking back to the start from the end) and loop until interrupted. For a large file, you could even "adaptively cache" the samples into a memory mapped region with calls to madvise to encourage reclamation as needed (this last one is a slightly over the top, and most likely overengineering). The al calls don't care about file boundaries at all. Tom "Blickensdorf, Robert D" wrote: > How do command an SGI Onyx2 to continuously play an audio loop? I see how > you read and write marker and loop data to and from an audio file (aiff-c > files) through the "af" library calls. What I don't understand is how to > actually play a loop with the "al" library calls.
Dear Sir, We are porting the application from IRIX SGI to WinXP, hence we need to support the AIFF file recording and editing on WinXP. My query is : Is it possible to use the audiofile and port them on windows and use the ported lib on WinXP in proprietary software ? Our requirement : To support the AIFF format recording/editing on WinXP. I will be highly thankful if you can suggest the proper approach. Thanks in advance Thanks & Regards Ketan Mehta
After a long time we're finally retiring Majordomo as mailing list manager for oss.sgi.com and have replaced it with Ecartis. From a user perspective Ecartis is similar to Majordomo, that is subscribing and unsubscribing do work the same way. In addition we now offer new features such as a digest mode. For more information send an email containing the word "help" to Ecartis <at> oss.sgi.com. For a while we'll still have it available under the old majordomo <at> oss.sgi.com address as well. Ralf
Hi:
I am a newbie to audio play .Now I write one file to play some
wave files with libaudio .
First I open the wave file using afOpenFile and get some parameters from
the wave files.
and construct a socket on local computer with esd_play_stream function.
The last thing
I want to do is to read frames from the wave files and write them to
audio device (
in my computer is /dev/dsp) by system call "write(esd,buf,frame_length)"
Oh. It seems working fine. But when I run another program, f.e .
mpg123 , to listen
some music, then run my own program after write the frame into the dsp
device. The
mpg123 stop producing any sound. Only run my own program again, mpg123
can produce
sound too. What happend to my program.
(Note. I modified the original the esd_play_file function. After I
open socket, I don't close it immediately ,on the contrary keep it
open. untill I force it close. )
Thank you for your help and great work.
Sun Zongun
Sorry.. this is not the correct mailing list to post this question.. and I would answer it for you if I could, but I'm unfamiliar with the libesd API. isn't esound a gnome entity? You might check gnome's homepage for a mailing list about libesd sun zongjun wrote: >Hi; > > I use the libesd to play wav file, but when I connect to esd by >calling esd_play_stream. I can't get the proper socket ID. What >is the cause of th question ?? > Thank you for help > > Sun Zongjun > > > > >
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