On Fri, Dec 5, 2008 at 12:03 PM, Harsha, Priya <priya.harsha@xxxxxxxxx> wrote: > Hi, > > If my sound card supports hardware mixing, how do I need to code my sound card driver such that I can send multiple streams through ALSA to the sound card driver at the same time? > Check out the emu10k1 driver. You need something like the voice allocator in that driver that assigns a hardware mixing channel or channels when ALSA asks the driver for a new PCM stream. User space would open the same device multiple times (up to the hardware voice limit) and the driver manages the allocations. From userspace POV a hardware mixing device looks just like a single stream device, but it doesn't return -EBUSY when you open it multiple times. Lee _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
