At 06:27 AM 10/20/2006, Takashi Iwai wrote: ><snip...> > > I'm looking if there is a solution (application API) provided by ALSA > to do > > channel-mapping. If there is one, I can just ask ALSA to do the > > "heavy-lifting" of swapping the surround sound channels. If not, I'll > > iterate through the PCM data, mapping the channels to the format expected > > by ALSA. > >Currently, there is no setup API for multi-channel binding. The >channels are statically defined as FL/FR/RL/RR/C/LFE. > >It'd be of course nice to have an API for multi-channel binding. >We can define either a read-only or a read-write API, namely, > >1. The driver provides a channel mapping information for multi-channel > device > >2. Apps can change channel bindings dynamically as they like > >In each case, we can keep the original FL/FR/RL/RR/C/LFE order as a >fallback so that old apps still run without modification. Thanks much for answering all my question. That is very helpful. >If you have any API proposal, please let us know. We don't currently have an API for channel mapping. I think ALSA devs. or the sound card driver devs. would be in a better position to design an API that the application can just use, but I'll keep that in mind, if I see something that is useful for the API. -- Daniel Yek ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
