On Fri, 24.04.09 17:31, Baek Chang (baeksan at ccrma.stanford.edu) wrote: > When calling pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result), > is there a way to specify the minimum requested length for the chunk? The > length that is passed in, is the maximum request for the thread, but I don't > see that there is a minimum requested length. Is this set up by configuring > the minimum requested latency when the sink is created? > > In my module, I request 4096 bytes, and sometimes I get back 628. When I > request say 8192, I still get 628 sometimes. Is there a relation to the max > requested length of the memchunk and what is actually returned? No, there is no lower limit that you could configure. This wouldn't really fit into the zero-copy logic of PA because enforcing a minimal block size like this would require merging multiple smaller blocks by copying them together. If you have device with fixed block sizes you can use pa_sink_render_into() instead of pa_sink_render(). That will mix exactly the requested amount of data into the buffer you pass to it. Lennart -- Lennart Poettering Red Hat, Inc. lennart [at] poettering [dot] net ICQ# 11060553 http://0pointer.net/lennart/ GnuPG 0x1A015CC4
