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
<snip> > > > > 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.
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
This issue is not on Delta44, but an Intel motherboard. But I would not expect to hit an assert in Alsa-lib whatever we do, surely?
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
9600,12000 are not in Table 56. Defined Sample Rates of HDA specification
http://git.kernel.org/cgit/linux/kernel/git/tiwai/hda-emu.git/tree/codecs/ad...
Most 6 channels audio are at 48000Hz, but some application upmix stereo 44100Hz to 6 channels
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pc...
From the HDA spec it appears that the buffers written to the BDL and
sent to a codec must be 128 byte aligned (section 4.5.1). The alignment was not happening especially when playing 6 channels.
Do you mean the driver still have this alignment when playing 6 channel ? I