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/audiopolicy/service/AudioPolicyInterfaceImpl.cpp b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
index 7dd6d70..dc676d0 100644
--- a/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
+++ b/services/audiopolicy/service/AudioPolicyInterfaceImpl.cpp
@@ -362,14 +362,22 @@
}
status_t AudioPolicyService::startInput(audio_io_handle_t input,
- audio_session_t session)
+ audio_session_t session,
+ audio_devices_t device,
+ uid_t uid,
+ bool *silenced)
{
+ // If UID inactive it records silence until becoming active
+ *silenced = !mUidPolicy->isUidActive(uid) && !is_virtual_input_device(device);
+
if (mAudioPolicyManager == NULL) {
return NO_INIT;
}
+
Mutex::Autolock _l(mLock);
- AudioPolicyInterface::concurrency_type__mask_t concurrency;
- status_t status = mAudioPolicyManager->startInput(input, session, &concurrency);
+ AudioPolicyInterface::concurrency_type__mask_t concurrency =
+ AudioPolicyInterface::API_INPUT_CONCURRENCY_NONE;
+ status_t status = mAudioPolicyManager->startInput(input, session, silenced, &concurrency);
if (status == NO_ERROR) {
LOG_ALWAYS_FATAL_IF(concurrency & ~AudioPolicyInterface::API_INPUT_CONCURRENCY_ALL,