I'm getting a lot of xruns with some buffer/period sizes and it's perfectly reproducible. It happens when the buffer is divided in two periods and the second period is a bit smaller of the first one. For example:
[EMAIL PROTECTED] Giu]$ aplay -v -B300000 -F150000 something.wav Playing WAVE 'something.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo Plug PCM: Hardware PCM card 0 'Gina24' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 13216 period_size : 6624 period_time : 150204 tick_time : 1000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 6624 xfer_align : 6624 start_threshold : 6624 stop_threshold : 13216 silence_threshold: 0 silence_size : 0 boundary : 1732247552 xrun!!! (at least 0.000 ms long) Status: state : XRUN trigger_time: 1085219431.336894000 tstamp : 1085219431.336894000 delay : 0 avail : 13248 avail_max : 13248 Period 0 is 6624 frames and Period 1 is 6592 frames long (32 frames shorter). I put some debug code and this is the output for a the playback test above: May 22 11:54:22 localhost kernel: pcm_trigger start May 22 11:54:22 localhost kernel: pointer=6656 period=1 May 22 11:54:22 localhost kernel: pcm_trigger stop May 22 11:54:22 localhost kernel: Prepare May 22 11:54:22 localhost kernel: pcm_trigger start May 22 11:54:22 localhost kernel: pointer=6656 period=1 May 22 11:54:22 localhost kernel: pcm_trigger stop May 22 11:54:22 localhost kernel: Prepare May 22 11:54:22 localhost kernel: pcm_trigger start May 22 11:54:22 localhost kernel: pointer=6656 period=1 May 22 11:54:23 localhost kernel: pcm_trigger stop May 22 11:54:23 localhost kernel: Prepare May 22 11:54:23 localhost kernel: pcm_trigger start Note that I get an xrun after every period. Most xruns are 0ms long, sometimes they are 1ms and there are no other values. Only 1 or 0. If the periods have the same size or there are three or more periods it works fine: [EMAIL PROTECTED] Giu]$ aplay -v -B200000 -F100000 something.wav May 22 11:59:38 localhost kernel: pcm_hw_params ok May 22 11:59:38 localhost kernel: Prepare May 22 11:59:38 localhost kernel: pcm_trigger start May 22 11:59:38 localhost kernel: pointer=4448 period=1 May 22 11:59:38 localhost kernel: pointer=32 period=0 May 22 11:59:38 localhost kernel: pointer=4448 period=1 May 22 11:59:38 localhost kernel: pointer=32 period=0 May 22 11:59:38 localhost kernel: pointer=4448 period=1 May 22 11:59:38 localhost kernel: pointer=32 period=0 (alsa-driver 1.0.4) -- Giuliano. ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
