Commit Graph

9 Commits

Author SHA1 Message Date
Bill Somerville
d1fa08ab78
Handle 24hr wrap of QAudioInput::elapsedUSecs() on Linux & Windows 2020-08-22 18:09:51 +01:00
Bill Somerville
4f68dfda40
Only tune audio buffer sizes on Windows 2020-08-11 14:27:46 +01:00
Bill Somerville
0cf14dfcc9
Remove user adjustable audio buffer sizes from Settings
Fixed buffer sizes are  used. Rx use s 3456 x 1st  downsample rate x 5
audio  frames  of  buffer  space.  On Windows  this  means  that  each
chunk (periodSize())  delivered from the  audio stream is  our initial
DSP processing chunk size, thus  matching audio buffer latency exactly
with WSJT-X's  own front  end latency. This  should result  in optimal
resilience to high system loads that might starve the soundcard ADC of
buffers to fill and case dropped audio frames.

For Tx  a buffer sufficient for  1 s of  audio is used at  present, on
Windows  the period  size will  be  set to  1/40 of  that which  gives
reasonably low latency  and plenty of resilience to  high system loads
that might  starve the soundcard DAC  of audio frames to  render. Note
that a 1 s  buffer will make the "Pwr" slider slow  to respond, we may
have to reduce the Tx audio buffer size if this is seen as a problem.
2020-08-11 13:48:01 +01:00
Bill Somerville
ecde374cee
Trying a fixed audio input buffer size 2020-08-10 11:01:38 +01:00
Bill Somerville
2e413713a3
Tidy dropped frame status bar message 2020-08-08 19:40:42 +01:00
Bill Somerville
02e19b687f
Status message to report approximate # of dropped Rx audio frames
This is  a first cut  at this to  evaluate buffer size  adjustments on
supported platforms. A final version might limit status bar reports to
>1000 dropped frames or similar.
2020-08-08 17:12:48 +01:00
Bill Somerville
6ea62d9476
Remove default audio devices from audio configuration
This enforces  an audio input device  in the settings dialog  since we
can't do anything  without an input device. A nil  audio output device
is allowed with a warning.
2020-08-08 16:57:51 +01:00
Bill Somerville
a0ceace5b4
User configurable audio device buffer sizes
Adjusting these may help with  audio drop-outs, particularly on slower
CPU systems or heavily loaded systems. Smaller buffer sizes leave less
margin for  process interruptions,  larger sizes waste  resources that
could impact other processes.
2020-08-08 16:25:14 +01:00
sirhc808
1f57ba5fec improve physical structure 2019-07-02 12:45:05 -05:00