Dne 26. 03. 20 v 18:59 Pavel Hofman napsal(a): > Dne 26. 03. 20 v 18:44 Jaroslav Kysela napsal(a): >> Dne 26. 03. 20 v 18:19 Pavel Hofman napsal(a): >>> Hi, >>> >>> Please how is the module params pcm_notify supposed to be used, to do >>> what the documentation says: Break capture when PCM format/rate/channels >>> changes? >>> >>> Breaking capture side operation when the playback side changes the >>> params is very useful, but I cannot find a way to use this param >>> properly. When the capture side is open, the playback side cannot use a >>> different parameter than the one currently used by the capture side (the >>> configuration space is limited) >> >> Really? Then it's a bug introduced by the last changes. >> >> If you look to sources: >> >> if (get_notify(dpcm)) >> runtime->hw = loopback_pcm_hardware; >> else >> runtime->hw = cable->hw; >> >> And: >> >> if (!(cable->valid & ~(1 << substream->stream)) || >> (get_setup(dpcm)->notify && >> substream->stream == SNDRV_PCM_STREAM_PLAYBACK)) >> params_change(substream); >> >> So the functionality should be there. > > I am using older kernels (4.15 and 3.16), but this is an old functionality. > > modprobe snd-aloop pcm_substreams=1 pcm_notify=1,1 > Please is there any way to solve this issue? Thanks a lot for your patience. Best regards, Pavel.
