2010/5/25 James Courtier-Dutton <james.dutton@xxxxxxxxx> > > Could this maybe explain why pulseaudio was having such problems with > alsa with regards to gain controls???? > Did you answer PA 's developer 's question in FOMS http://thread.gmane.org/gmane.linux.alsa.devel/50417/focus=50555 what is the answer of this question ? - That snd_pcm_sw_params_set_start_threshold(.. , (snd_pcm_uframes_t) -1)) disables automatic stopping on underrun. snd_pcm_uframes_t is unsigned and in snd_pcm_write_areas() pcm/pcm.c start_threshold seem used as a signed number is this a special case , what is the difference between 1 and -1 ? if (state == SND_PCM_STATE_PREPARED) { snd_pcm_sframes_t hw_avail = pcm->buffer_size - avail; hw_avail += frames; /* some plugins might automatically start the stream */ state = snd_pcm_state(pcm); if (state == SND_PCM_STATE_PREPARED && hw_avail >= (snd_pcm_sframes_t) pcm->start_threshold) { err = snd_pcm_start(pcm); if (err < 0) goto _end; } } _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
