At Tue, 11 Feb 2003 08:53:59 +0100, Martin Herren wrote: > > Hej, > > i'm new on this list as well as to alsa. > > We need to find out the supported sampling rates (and other parameters) for the pcm >devices of soundcards. > > We used snd_pcm_hw_params_test_rate() for this, which according to the documentation >(http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___h_w___params.html#a53) > should return 1 if the rate is available, 0 otherwise. > The problem is that it always returned an non-null value, for any rate even if we >knew it wasn't supported. > > Then we found out that we need to call snd_pcm_hw_params_any() first, and then >snd_pcm_hw_params_test_rate() returns 0 for supported rates, and a negativ value >(-22) otherwise.
the documentation is wrong. the test functions return zero if supported and a negative value if not supported, as well as the set functions do. Takashi ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
