I were to utilize a ramping function to process a block of audio in a sink-input, where should this be called? I tried using inserting a ramping routine on a sink-input within pa_sink_input_peek(), in sink-input.c This seems to give me strange results. Any suggestions on where I could process the audio data of individual sink-inputs before it gets mixed down into a single sink? Thanks in advance Baek On Thu, Dec 11, 2008 at 10:04 AM, Lennart Poettering <lennart at poettering.net > wrote: > On Thu, 11.12.08 09:56, Baek Chang (baeksan at ccrma.stanford.edu) wrote: > > > What is the proper way to do volume ramping in pulse audio to avoid > clicking > > when changed the volume? I wrote a module to callback and change the > volume > > in small incremental steps, but it seems that pulse seems to apply the > > volume changes on the audio buffer as a whole. Does pulseaudio take a > > volume command, and then process the one audio buffer with that set > volume? > > I'm using a buffer size of 4096 at 44100Hz, so it is about 10mS. So how > > would I go about ramping the volume, in say about 15 mS? > > Volumes are applied block-by-block. The Block size is variable and > depends on the sound device and the application used. > > I wrote some code to implement volume "envelopes" for this. The code > is there, it's even included in the tarball. But it's not hooked > up. And until I finish that I fear, no: we cannot do volume ramping. > > Sorry, > > Lennart > > -- > Lennart Poettering Red Hat, Inc. > lennart [at] poettering [dot] net ICQ# 11060553 > http://0pointer.net/lennart/ GnuPG 0x1A015CC4 > _______________________________________________ > pulseaudio-discuss mailing list > pulseaudio-discuss at mail.0pointer.de > https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss > -- Baek Chang baeksan at ccrma.stanford.edu 407-267-6701 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20081215/55ccf63f/attachment.htm>
