Hi,
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.
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?
http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___h_w___params.
html
Only snd_pcm_hw_params_test_rate() can be call multiple times, Verify if a rate is available inside a configuration space for a PCM.
Those snd_pcm_hw_params_ser_rate* functions restrict the configuration space to one rate and can be called once only
The stream is being opened and closed at each attempt.
Seem Delta 44 does not support 2,4,6 or 8 channels
aplay --dump-hw-params -Dhw:CARD=M44 any.wav
Do both channel min and channel max > 8 ?
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/...
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/tree/sound/pci/...
rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, .rate_min = 4000, .rate_max = 48000,
If the driver really support any rate between 4000Hz and 48000Hz, the list of supported rates has 48000-4000+1 entries