Bach, Andrea wrote: > how can I change the size that is provided inside the „transfer“- > callback of an external PCM plugin? You cannot. ALSA assumes that there is a ring buffer that has the configured buffer size, and that when N frames are reported as available, any number of frames between 1 and N can be read/written. > I need to write a filter plugin and I have to use for processing > a chunk size of power of two (32, 64, or 128 bytes … that’s because of > the use of FFT). But I get inside the transfer callback a buffer of > length 1000. That would be ok if I could just return let's say > 960 bytes Handling less bytes than requested would imply that an error occured. You could add your own buffer to keep any remaining frames of the 128-frame chunk until the next transfer call. Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
