Hello. On Thu, 2009-10-01 at 08:39, pl bossart wrote: > +/** QOS > + * > + * Defines Audio Quality of Service > + */ > +#define SND_QOS_HIFI 0 > +#define SND_QOS_VOICE 1 > +#define SND_QOS_SYSTEM 2 > > My $0.02 comment is that I don't know what QOS entails. I have no > issue with all the other defines, but this one isn't quite clear. > What exactly is supposed to happen if I set the QOS to voice? A lower > SNR for voice? A lower latency for voice with a lower group delay? A > lower oversampling ratio? An optimized routing for voice? All of the > above? Good point. The key is here that some systems offer lower quality audio which also has a lower power consumption. That would save power when being on a voice call but give you the best quality when listening to your music. > +#define SND_SCN_PHONECALL_HANDSET "phonecall handset" > +#define SND_SCN_PHONECALL_HEADSET "phonecall headset" > +#define SND_SCN_PHONECALL_BLUETOOTH "phonecall bluetooth" > +#define SND_SCN_PHONECALL_IP "phonecall ip" > > Same here, this is ambiguous, you can have an IP call over bluetooth. > Which scenario would you use then? > I guess if you want the scenarios to be used by apps in a portable > way, a clearer definition of each scenario is probably needed? I removed the defines here. We don't use them and should re-think and define them when we actually implement its users. Thanks for your comments. regards Stefan Schmidt _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
