On Thu, Oct 2, 2014, at 14:43, Raymond Yau wrote: > > What do mean when you say default-fragments * > default-fragment-size-msec? > I suppose PulseAudio uses a ring of `default-fragments` buffers, with a length of `default-fragment-size-msec` each. For example, for 4 fragments of 25 ms, I get "snd_pcm_delay() returned a value that is exceptionally large: -88204 bytes (-500 ms).", with 500 ms = -5 * 4 * 25. > Seem pulseaudio using 200ms buffer and 100ms period > > it is strange that hwptr is zero when app_ptr is 8820 > > http://cgit.freedesktop.org/pulseaudio/pulseaudio/plain/src/tests/alsa-time-test.c > > Do alsa-time-test run with fillrate 441 with 10ms Interval ? > Not sure I'm running it properly, but.. $ src/alsa-time-test default 2>&1 | wgetpaste -s gists Your paste can be seen here: https://gist.github.com/1c21953104271873047a As you can see, it crashes with "alsa-time-test: tests/alsa-time-test.c:244: main: Assertion `(unsigned) avail <= buffer_size' failed." If I run "src/alsa-time-test default 0 441", it works just fine -- as long as I don't touch it: --- snip --- 179 1711866 1711860 1693990 78939 177 4234 0 0 3 60 1711926 1711860 1693990^Z [1]+ Stopped src/alsa-time-test default 0 441 $ fg src/alsa-time-test default 0 441 78939 221 4234 0 0 3 1480593 3192519 3192476 3173990 79380 65489 -61034 4 441 3 alsa-time-test: tests/alsa-time-test.c:244: main: Assertion `(unsigned) avail <= buffer_size' failed. Is this unexpected? Regards, Laurentiu > alsa-sink-USB Audio] alsa-sink.c: Underrun! > > E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_delay() returned a value > that > is exceptionally large: -176572 bytes (-1000 ms). > > E: [alsa-sink-USB Audio] alsa-util.c: Most likely this is a bug in the > ALSA > driver 'snd_usb_audio'. Please report this issue to the ALSA developers. > > E: [alsa-sink-USB Audio] alsa-util.c: snd_pcm_dump(): > > E: [alsa-sink-USB Audio] alsa-util.c: Hardware PCM card 0 'USB Audio > CODEC' > device 0 subdevice 0 > > E: [alsa-sink-USB Audio] alsa-util.c: Its setup is: > > E: [alsa-sink-USB Audio] alsa-util.c: stream : PLAYBACK > > E: [alsa-sink-USB Audio] alsa-util.c: access : MMAP_INTERLEAVED > > E: [alsa-sink-USB Audio] alsa-util.c: format : S16_LE > > E: [alsa-sink-USB Audio] alsa-util.c: subformat : STD > > E: [alsa-sink-USB Audio] alsa-util.c: channels : 2 > > E: [alsa-sink-USB Audio] alsa-util.c: rate : 44100 > > E: [alsa-sink-USB Audio] alsa-util.c: exact rate : 44100 (44100/1) > > E: [alsa-sink-USB Audio] alsa-util.c: msbits : 16 > > E: [alsa-sink-USB Audio] alsa-util.c: buffer_size : 8820 > > E: [alsa-sink-USB Audio] alsa-util.c: period_size : 4410 > > E: [alsa-sink-USB Audio] alsa-util.c: period_time : 100000 > > E: [alsa-sink-USB Audio] alsa-util.c: tstamp_mode : ENABLE > > E: [alsa-sink-USB Audio] alsa-util.c: period_step : 1 > > E: [alsa-sink-USB Audio] alsa-util.c: avail_min : 4410 > > E: [alsa-sink-USB Audio] alsa-util.c: period_event : 1 > > E: [alsa-sink-USB Audio] alsa-util.c: start_threshold : -1 > > E: [alsa-sink-USB Audio] alsa-util.c: stop_threshold : 1156055040 > > E: [alsa-sink-USB Audio] alsa-util.c: silence_threshold: 0 > > E: [alsa-sink-USB Audio] alsa-util.c: silence_size : 0 > > E: [alsa-sink-USB Audio] alsa-util.c: boundary : 1156055040 > > E: [alsa-sink-USB Audio] alsa-util.c: appl_ptr : 8820 > > E: [alsa-sink-USB Audio] alsa-util.c: hw_ptr : 0 > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
