At 19 Mar 2003 12:24:30 +0000, Giuliano Pochini wrote: > > > I'm facing another *£%@ problem. When period size is a multiple or > submultiple of PAGE_SIZE, it works fine, but when it isn't, sound > clicks, pops, repeapeapeats, skps :(( And since the period never crosses > physically the page boundary because I split it when it happens, I can't > imagine what's wrong. Perhaps some of you had the same problem. > > .period callback does this:
do you mean pointer callback? > > bufsize=substream->runtime->periods*substream->runtime->period_size; you already have substream->runtime->buffer_size for this. > //addr==number of bytes transferred. > pos=bytes_to_frames(substream->runtime, addr); > return(pos%bufsize); i suppose addr is updated in the interrupt handler, right? > Here is a log of sg list construction: > > AddX=period n > pa=page addr > phy=snd_sgbuf_get_addr(sgbuf, offs) > sz=sub-period size > > aplay -B139319 -F69660 (OK) > pcm_hw_params (bufsize=24576 periods=2 persize=12288) > pcm_hw_params table size=131072 pages=32 > pcm_hw_params Add0 (off=0 pa=f3ff000 phy=f3ff000 sz=4096) > pcm_hw_params Add0 (off=4096 pa=f3fe000 phy=f3fe000 sz=4096) > pcm_hw_params Add0 (off=8192 pa=f3fd000 phy=f3fd000 sz=4096)irq > pcm_hw_params Add1 (off=12288 pa=f3fc000 phy=f3fc000 sz=4096) > pcm_hw_params Add1 (off=16384 pa=f417000 phy=f417000 sz=4096) > pcm_hw_params Add1 (off=20480 pa=f416000 phy=f416000 sz=4096)irq > pcm_hw_params End (off=24576 rest=0) > > aplay -B139319 -F34830 (noise-party) > pcm_hw_params (bufsize=24576 periods=4 persize=6144) > pcm_hw_params table size=131072 pages=32 > pcm_hw_params Add0 (off=0 pa=f3ff000 phy=f3ff000 sz=4096) > pcm_hw_params Add0 (off=4096 pa=f3fe000 phy=f3fe000 sz=2048)irq > pcm_hw_params Add1 (off=6144 pa=f3fe000 phy=f3fe800 sz=2048) > pcm_hw_params Add1 (off=8192 pa=f3fd000 phy=f3fd000 sz=4096)irq > pcm_hw_params Add2 (off=12288 pa=f3fc000 phy=f3fc000 sz=4096) > pcm_hw_params Add2 (off=16384 pa=f417000 phy=f417000 sz=2048)irq > pcm_hw_params Add3 (off=18432 pa=f417000 phy=f417800 sz=2048) > pcm_hw_params Add3 (off=20480 pa=f416000 phy=f416000 sz=4096)irq > pcm_hw_params End (off=24576 rest=0) the logs seem fine. did you set up page callback, too? were the irqs issued correctly with the 1.5 page periods? i mean, at the proper timing? maybe it would be easier to debug if you show the actual code and the hardware spec... Takashi ------------------------------------------------------- This SF.net email is sponsored by: Does your code think in ink? You could win a Tablet PC. Get a free Tablet PC hat just for playing. What are you waiting for? http://ads.sourceforge.net/cgi-bin/redirect.pl?micr5043en _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
