For playback I am using the ALSA callback to wake up a thread that then feeds the ALSA ring buffer with a period-worth of samples using snd_pcm_writei(). I've set snd_pcm_sw_params_set_avail_min() to one period. The problem is that most of the time when my thread wakes up and tries to write the data, snd_pcm_writei() fails with -EAGAIN, and I must retry until it works. Presumably this write failure is because there is not enough space in the ring buffer, but then why did the ALSA callback fire in the first place? As it stands my retries are eating needless amounts of CPU. I'm very confused, please help. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
