[alsa-devel] Playback - Overwrite buffer with silence

[Nilhcraiv]

Raymind wrote:
> Pulseaudio is a sound server which mix several playback streams, 
> silence size may has no effect since the alsa sink may use different 
> period size/buffer size or disable period wakeup when using timer 
> scheduling 
Then, How I can avoid under-run? I mean, If I attempt to write data in a 
buffer and the under-run occurs, It takes a long time to recover the pcm 
and the data must be lost. ¿how I can put silence in buffer instead of 
lost data?

I have set the snd_pcm_sw_params_set_stop_threshold() to the boundary 
value also, but the under-run occurs

My Playback PCM now:

INFO: Using "default" device.
ALSA <-> PulseAudio PCM I/O Plugin
Its setup is:
   stream       : PLAYBACK
   access       : RW_INTERLEAVED
   format       : S16_LE
   subformat    : STD
   channels     : 2
   rate         : 48000
   exact rate   : 48000 (48000/1)
   msbits       : 16
   buffer_size  : 720
   period_size  : 240
   period_time  : 5000
   tstamp_mode  : NONE
   period_step  : 1
   avail_min    : 240
   period_event : 0
   start_threshold  : 720
   stop_threshold   : 6485183463413514240
   silence_threshold: 0
   silence_size : 6485183463413514240
   boundary     : 6485183463413514240


Regards,