Hi Niko, Do you just process Audio buffers in the NDK, you dont actually access any low level audio classes or streams?
On Thu, Apr 15, 2010 at 4:51 PM, niko20 <[email protected]> wrote: > Also was going to mention that in Android foreground apps always get > priority in scheduling regardless of thread priority. Read that in > these forums somewhere. > > -niko > > On Apr 15, 10:50 am, niko20 <[email protected]> wrote: > > This is why I've moved any new projects that generate audio in the NDK > > to create the audio data and pass the buffers back to me. I've seen an > > increase in speed in buffer creation (44Khz stereo sound) from 400ms > > down to 10ms or so to mix a buffer, over 100x speed increase. > > > > It's best to put any audio processing in the NDK to get max speed > > possible. > > > > -niko > > > > On Apr 15, 3:35 am, Jesper Hansen <[email protected]> wrote: > > > > > > > > > On my N1, my player spends around 15-30% of its time generating the > audio > > > data. The my player app has focus everything sounds fine, but when I > start > > > another app that also requires a lot of cpu time the sounds start to > stutter > > > badly. > > > > > Using top and ps on the N1, I can see that the applications that causes > my > > > sounds to stutter, have a nice value of 0 (THREAD_PRIORITY_DEFAULT). > > > It puzzles me why these applications get more attention from the > > > scheduler,than my thread, which runs at nice level -16 > > > (THREAD_PRIORITY_AUDIO). > > > > > On Thu, Apr 15, 2010 at 04:01, ani <[email protected]> > wrote: > > > > So what you are trying to say is in-between(time it takes to play the > > > > audio) the audio writes you are doing some > > > > cpu intensive operations which is causing this stuttering ??? > > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "Android Developers" group. > > > > To post to this group, send email to > [email protected] > > > > To unsubscribe from this group, send email to > > > > [email protected]<android-developers%[email protected]><android-developers%2Bunsubs > [email protected]> > > > > For more options, visit this group at > > > >http://groups.google.com/group/android-developers?hl=en > > > > > > To unsubscribe, reply using "remove me" as the subject. > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
