Liam Girdwood wrote: > On Mon, 2007-06-18 at 14:55 -0700, Steve Longerbeam wrote: > >> Hi all, >> >> I'm developing an SoC driver for a sound engine that supports playing up >> to 64 simultaneous substreams, all mixed in h/w to a stereo DAC. But it >> doesn't appear that the SoC framework supports multiple substreams, >> according to soc_new_pcm(). Am I missing something, or is this on the >> asoc development roadmap? >> >> > > It's now on the development roadmap ;) > > https://bugtrack.alsa-project.org/wiki/wikka.php?wakka=ASoCRoadMap > that's cool, thanks. I've got some more questions about multiple substreams. In the sound engine I'm working on, each "voice" (substream) has its own private controls, such as L/R volume, 3D (distance and angle factors), and gain envelopes. All 64 substreams are then mixed in h/w to a single stereo stream, and global controls are then applied, such as master volume. It's looking like the way to implement per-substream controls is to add the controls for all possible substreams, and then somehow determine which substream is being referred to in the get/put callbacks, and then get/put the control for only that substream. Is this the way per-substream controls should be done? Also, with 64 substreams and multiple controls for each, we're talking about adding hundreds of controls, can ALSA handle this? I can imagine alsamixer looking quite crowded :-/ Thanks, Steve _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
