James Courtier-Dutton wrote: > Jaroslav Kysela wrote: >> On Fri, 13 Jun 2008, Takashi Iwai wrote: >> >> >>> - Add some new API functions, >>> >> I would prefer to extend the current API than to change meaning of hw_ptr >> to handle extra latencies. >> >> > I would prefer the definition of snd_pcm_delay() to be: > Before the next sample is written to the buffer, snd_pcm_delay() returns > the expect time delay, in frames, indicating the time the next sample > will reach the speakers. > This is what snd_pcm_delay() was introduced into the ALSA api for. I > remember, because it was added as a result of me requesting it. > > > Then implement a totally different api call to help with under run timings. Big +1 You also have to think of the use cases currently out there. * World + Dog uses it as James (and Lennart) states. * Wine uses it sans latency. So lots of apps having to change to cope verses one (known) app changing. I think even the wine folk would agree this is more sensible! Also by changing the definition, would you not have to change the usb-audio driver works? In general I'd say it's a whole lot less work to leave snd_pcm_delay() as it is, update the docs and add a new api function for under run stuff. Col _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
