fix volume and effect enable delay on offloaded tracks
Volume: add a method to wake up the mediaserver playback
thread when a volume command is received on an offloaded track.
Effects: call effect chain process on offloaded playback threads
asynchronously from writes to allow effect state updates while
waiting for async write callback.
Bug: 10796540.
Change-Id: Id2747ae88783575d1d7ffd6fc86fbd054ab2c739
diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 2d9d485..187adf3 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -2238,12 +2238,21 @@
}
// only process effects if we're going to write
- if (sleepTime == 0) {
+ if (sleepTime == 0 && mType != OFFLOAD) {
for (size_t i = 0; i < effectChains.size(); i ++) {
effectChains[i]->process_l();
}
}
}
+ // Process effect chains for offloaded thread even if no audio
+ // was read from audio track: process only updates effect state
+ // and thus does have to be synchronized with audio writes but may have
+ // to be called while waiting for async write callback
+ if (mType == OFFLOAD) {
+ for (size_t i = 0; i < effectChains.size(); i ++) {
+ effectChains[i]->process_l();
+ }
+ }
// enable changes in effect chain
unlockEffectChains(effectChains);