diff --git a/media/libaudiohal/impl/StreamHalAidl.cpp b/media/libaudiohal/impl/StreamHalAidl.cpp
index c4e4ae8..0d65f8c 100644
--- a/media/libaudiohal/impl/StreamHalAidl.cpp
+++ b/media/libaudiohal/impl/StreamHalAidl.cpp
@@ -367,8 +367,12 @@
     if (!mStream) return NO_INIT;
     StreamDescriptor::Reply reply;
     RETURN_STATUS_IF_ERROR(updateCountersIfNeeded(&reply, statePositions));
-    *frames = std::max<int64_t>(0, reply.observable.frames);
-    *timestamp = std::max<int64_t>(0, reply.observable.timeNs);
+    if (reply.observable.frames == StreamDescriptor::Position::UNKNOWN ||
+        reply.observable.timeNs == StreamDescriptor::Position::UNKNOWN) {
+        return INVALID_OPERATION;
+    }
+    *frames = reply.observable.frames;
+    *timestamp = reply.observable.timeNs;
     return OK;
 }
 
@@ -377,8 +381,12 @@
     if (!mStream) return NO_INIT;
     StreamDescriptor::Reply reply;
     RETURN_STATUS_IF_ERROR(updateCountersIfNeeded(&reply));
-    *frames = std::max<int64_t>(0, reply.hardware.frames);
-    *timestamp = std::max<int64_t>(0, reply.hardware.timeNs);
+    if (reply.hardware.frames == StreamDescriptor::Position::UNKNOWN ||
+        reply.hardware.timeNs == StreamDescriptor::Position::UNKNOWN) {
+        return INVALID_OPERATION;
+    }
+    *frames = reply.hardware.frames;
+    *timestamp = reply.hardware.timeNs;
     return OK;
 }
 
@@ -387,7 +395,10 @@
     if (!mStream) return NO_INIT;
     StreamDescriptor::Reply reply;
     RETURN_STATUS_IF_ERROR(updateCountersIfNeeded(&reply));
-    *frames = std::max<int32_t>(0, reply.xrunFrames);
+    if (reply.xrunFrames == StreamDescriptor::Position::UNKNOWN) {
+        return INVALID_OPERATION;
+    }
+    *frames = reply.xrunFrames;
     return OK;
 }
 
@@ -577,7 +588,9 @@
         // For compatibility with HIDL behavior, apply a "soft" position reset
         // after receiving the "drain ready" callback.
         std::lock_guard l(mLock);
-        mStatePositions.framesAtFlushOrDrain = mLastReply.observable.frames;
+        if (mLastReply.observable.frames != StreamDescriptor::Position::UNKNOWN) {
+            mStatePositions.framesAtFlushOrDrain = mLastReply.observable.frames;
+        }
     } else {
         AUGMENT_LOG(W, "unexpected onDrainReady in the state %s", toString(state).c_str());
     }
@@ -670,7 +683,8 @@
             }
             mLastReply = *reply;
             mLastReplyExpirationNs = uptimeNanos() + mLastReplyLifeTimeNs;
-            if (!mIsInput && reply->status == STATUS_OK) {
+            if (!mIsInput && reply->status == STATUS_OK &&
+                    reply->observable.frames != StreamDescriptor::Position::UNKNOWN) {
                 if (command.getTag() == StreamDescriptor::Command::standby &&
                         reply->state == StreamDescriptor::State::STANDBY) {
                     mStatePositions.framesAtStandby = reply->observable.frames;