There is no hardware limit. The audio buffer is in main memory. If the driver is properly written you should be able to use ALSA to allocate a larger buffer.
Try emilio's kernel. It has 192/24 working and I believe it should work to allocate arbitrary buffers but I haven't tried. On Thu, Oct 16, 2014 at 5:31 AM, Rob <r.jans...@xs4all.nl> wrote: > I am trying to use the on-board analog sound output on a CubieBoard2 (A20) > with a program that I developed on the PC platform. > > It uses 16bit 48000 samples/s stereo audio output, and tries to set a 16384 > frame > buffer (16 periods of 1024 frames). > > The driver on the CubieBoard2 (from the current version of Cubian) refuses > this > setting and limits the number of periods to 8 and the buffer size to 8192 > frames. > > I can find the 8-period limit in the driver source that I retrieved using > git clone -b sunxi-3.4 --depth 1 > https://github.com/linux-sunxi/linux-sunxi.git > (I'm not completely certain that this is the source of the kernel I am > running). > > Is it a hardware-determined limitation? > However, when I change my program to use 2048-frame periods, it still limits > the buffer to 8192 periods, now 4. > > I wonder if there is some way to get around this, or if this is a hardware > limitation that can not be fixed in the driver (and so I will have to change > my program to work around having the smaller buffer)? > > Rob > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to linux-sunxi+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- Jon Smirl jonsm...@gmail.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
