The following assert is being hit in pcm_params.c:
"pcm_params.c:2249: snd1_pcm_hw_params_slave: Assertion `err >= 0'
failed."
This is from a developer using Portaudio in his own application; I have
yet
to ascertain full details, but it is trying successive sample rates to
see
which are valid.
Further info: this occurs with an Intel motherboard/soundcard, attempting
to
open and config the stream at 44100 using front, surround or hdmi pcm,
having
previously opened and tried at a lower, not-supported samplerate, and
closed.
AFAIK other pcms work
call to Pa_IsFormatSupported(NULL, &outputParameters, samprate ); will cause a crasch for a certain samprate. The Linrad log file is like this: TESTING PORTAUDIO DEVICE 10 FOR Rx output
id=10 device=front hostapi=ALSA max_input_chan=0 max_output_chan=6 Testing 0 8000.000000 err=-9997 Invalid sample rate Testing 1 9600.000000 err=-9997 Invalid sample rate Testing 2 11025.000000 err=-9997 Invalid sample rate Testing 3 12000.000000 err=-9997 Invalid sample rate Testing 4 16000.000000 err=-9997 Invalid sample rate Testing 5 22050.000000 err=-9997 Invalid sample rate Testing 6 24000.000000 err=-9997 Invalid sample rate Testing 7 32000.000000 err=-9997 Invalid sample rate Testing 8 44100.000000
This means that the call to Pa_IsFormatSupported did not return when samprate=44100.
The terminal window (stderr) shows this: root <at> Xeon:/home/dsp# ./xlinrad64 ALSA lib confmisc.c:1286:(snd_func_refer) Unable to find definition 'cards.HDA-Intel.pcm.rear.0:CARD=0' ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:4738:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM rear ALSA lib confmisc.c:1286:(snd_func_refer) Unable to find definition 'cards.HDA-Intel.pcm.center_lfe.0:CARD=0' ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:4738:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM center_lfe ALSA lib confmisc.c:1286:(snd_func_refer) Unable to find definition 'cards.HDA-Intel.pcm.side.0:CARD=0' ALSA lib conf.c:4259:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:4738:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2239:(snd_pcm_open_noupdate) Unknown PCM side ALSA lib pcm_route.c:947:(find_matching_chmap) Found no matching channel map ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused
Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started xlinrad64: pcm_params.c:2249: snd1_pcm_hw_params_slave: Assertion `err >= 0' failed. Aborted
Most likely bug in those user defined devices
Do portaudio hardcode "rear" device ?
http://git.alsa-project.org/?p=alsa-lib.git;a=blob;f=src/conf/cards/HDA-Inte...
Not all hda codecs support 44100Hz
Which hda codec?
The assert is hit with all current Debian and Ubuntu distros, for example Debian 8 (jessie) 32 bit: kernel 3.16.0-4-686-pae (Alsa 1.0.28) but is not seen with Fedora 20 or OpenSuse 12.1 (do they have asserts
off?).
Does this point to a flaw in the configuration or possibly a bug in Alsa-lib or can it occur just as a result of misuse of the Alsa API?
I will try to conceive some more tests. How can we debug this further Regards
Output of alsa-info.sh
and those customised devices in asoundrc