Don't record audio if UID is idle - media framework
To protect user's privacy if a UID is in an idle state we allow
recording but report silence (all zeros in the byte array) and once
the process goes in an active state we report the real mic data.
This avoids the race between the app being notified aboout its
lifecycle and the audio system being notified about the state
of a UID.
Test: Added - AudioRecordTest#testRecordNoDataForIdleUids
Passing - cts-tradefed run cts-dev -m CtsMediaTestCases
-t android.media.cts.AudioRecordTest
bug:63938985
Change-Id: I1442a9dda1553e9ea7a4a654c50555ac1ec06aa0
diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 4d5e094..bbdd89c 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -987,6 +987,21 @@
return mute;
}
+void AudioFlinger::setRecordSilenced(uid_t uid, bool silenced)
+{
+ ALOGV("AudioFlinger::setRecordSilenced(uid:%d, silenced:%d)", uid, silenced);
+
+ // TODO: Notify MmapThreads
+
+ AutoMutex lock(mLock);
+ for (size_t i = 0; i < mRecordThreads.size(); i++) {
+ sp<RecordThread> thread = mRecordThreads.valueAt(i);
+ if (thread != 0) {
+ thread->setRecordSilenced(uid, silenced);
+ }
+ }
+}
+
status_t AudioFlinger::setMasterMute(bool muted)
{
status_t ret = initCheck();