Hello,

Program terminated with signal 11, Segmentation fault. #0 0x00534502 in snd_pcm_hw_refine (pcm=0x94b36f0, params=0x94b36f0) at pcm_params.c:2291 2291 res = pcm->ops->hw_refine(pcm->op_arg, params); (gdb) bt #0 0x00534502 in snd_pcm_hw_refine (pcm=0x94b36f0, params=0x94b36f0) at pcm_params.c:2291 #1 0x0052a1e2 in snd_pcm_hw_params_any (pcm=0x94b36f0, params=0x94b36f0) at pcm.c:3178 #2 0x080497a7 in print_pcm_hw_params (pcm=0x94b36f0) at list.c:109 #3 0x080499ef in print_pcm_devices (handle=0x94af638) at list.c:147 #4 0x08049362 in main (argc=1, argv=0xbfcf66b4) at list.c:227 (gdb) print pcm->ops $1 = (const snd_pcm_ops_t *) 0x0

Source code at http://pastebin.com/rqBCDza7

Sound card is opened, PCM device is opened, hw params were just allocated, and now I'm calling snd_pcm_hw_params_any(). Trying to populate the empty params struct so as to interrogate it and find out the card's capabilities.

I'm sure I'm mis-using alsa-lib, but also shouldn't this have an assert() on pcm->ops ? What's the right call sequence to get capabilities of this PCM channel (sample rates, bit depths, etc)?

Thanks for any help!

--BO