Hi, I am using the eyes free TTS framework, and am observing a repeatable 1 second lag in the AudioTrack output that I am trying to explain.
The problem occurs after the first or second callback (ttsSynchDoneCB, see: frameworks/base/packages/TtsService/jni/ android_tts_SynthProxy.cpp). The underlying tts engine seems to be producing the callbacks fast enough, but for some reason there is a 1 second pause before playback. I see the following warning message in logcat: W/AudioTrack( 1262): obtainBuffer timed out (is the CPU pegged?) 0x11f650 user=0000894a, server=0000794a That message from AudioTrack is coming right after executing a line that looks like the following: result = cblk->cv.waitRelative(cblk->lock, milliseconds(waitTimeMs)); The value of waitTimeMs is 1 second, which is the delay I am seeing. I do not understand the cause of the delay however; the code calls obtainBuffer, and the message happens only if "framesAvailable" equals 0. I don't understand what framesAvailable means in this context, however, since it is during a call to AudioTrack::write that this is happening, and there is certainly something available to write. Can someone describe why this delay is occurring, and if there is anything I can try to get rid of it? Note that the CPU is certainly not pegged, the only thing going on at the time is the tts. Thanks, -Mark -- 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
