Expand nuplayer mutex for mediametrics management
refactor some mutex for how nuplayer sets up mediametrics data.
expanded locking to eliminate a couple race conditions.
Bug: 151644303
Bug: 151643722
Test: poc attached to bugs
Merged-In: I75f29a6254c5eab5d4f524ee7a7ef59f93a0b405
Merged-In: Ia2e68ef616e249a6e8746b9068f22bd208a0ffc8
Change-Id: I1e9bbcd67a1510f70fad66e8ef77f529008e248a
(cherry picked from commit 86b46a20b2730790759aefcfa4c5d0cb3589c61b)
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.cpp
index 3e5bdd6..fc8d2ca 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.cpp
@@ -115,6 +115,7 @@
updateMetrics("destructor");
logMetrics("destructor");
+ Mutex::Autolock autoLock(mMetricsLock);
if (mAnalyticsItem != NULL) {
delete mAnalyticsItem;
mAnalyticsItem = NULL;
@@ -128,6 +129,8 @@
status_t NuPlayerDriver::setUID(uid_t uid) {
mPlayer->setUID(uid);
mClientUid = uid;
+
+ Mutex::Autolock autoLock(mMetricsLock);
if (mAnalyticsItem) {
mAnalyticsItem->setUid(mClientUid);
}
@@ -541,10 +544,47 @@
}
ALOGV("updateMetrics(%p) from %s at state %d", this, where, mState);
- // gather the final stats for this record
+ // gather the final track statistics for this record
Vector<sp<AMessage>> trackStats;
mPlayer->getStats(&trackStats);
+ // getDuration() uses mLock
+ int duration_ms = -1;
+ getDuration(&duration_ms);
+
+ mPlayer->updateInternalTimers();
+
+ int64_t playingTimeUs;
+ int64_t rebufferingTimeUs;
+ int32_t rebufferingEvents;
+ bool rebufferingAtExit;
+ {
+ Mutex::Autolock autoLock(mLock);
+
+ playingTimeUs = mPlayingTimeUs;
+ rebufferingTimeUs = mRebufferingTimeUs;
+ rebufferingEvents = mRebufferingEvents;
+ rebufferingAtExit = mRebufferingAtExit;
+ }
+
+ // finish the rest of the gathering holding mLock;
+ // some of the fields we read are updated under mLock.
+ // we also avoid any races within mMetricsItem machinery
+ Mutex::Autolock autoLock(mMetricsLock);
+
+ mAnalyticsItem->setInt64(kPlayerDuration, duration_ms);
+
+ // these update under mLock, we'll read them under mLock
+ mAnalyticsItem->setInt64(kPlayerPlaying, (playingTimeUs+500)/1000 );
+
+ if (rebufferingEvents != 0) {
+ mAnalyticsItem->setInt64(kPlayerRebuffering, (rebufferingTimeUs+500)/1000 );
+ mAnalyticsItem->setInt32(kPlayerRebufferingCount, rebufferingEvents);
+ mAnalyticsItem->setInt32(kPlayerRebufferingAtExit, rebufferingAtExit);
+ }
+
+ mAnalyticsItem->setCString(kPlayerDataSourceType, mPlayer->getDataSourceType());
+
if (trackStats.size() > 0) {
for (size_t i = 0; i < trackStats.size(); ++i) {
const sp<AMessage> &stats = trackStats.itemAt(i);
@@ -586,24 +626,6 @@
}
}
- // always provide duration and playing time, even if they have 0/unknown values.
-
- // getDuration() uses mLock for mutex -- careful where we use it.
- int duration_ms = -1;
- getDuration(&duration_ms);
- mAnalyticsItem->setInt64(kPlayerDuration, duration_ms);
-
- mPlayer->updateInternalTimers();
-
- mAnalyticsItem->setInt64(kPlayerPlaying, (mPlayingTimeUs+500)/1000 );
-
- if (mRebufferingEvents != 0) {
- mAnalyticsItem->setInt64(kPlayerRebuffering, (mRebufferingTimeUs+500)/1000 );
- mAnalyticsItem->setInt32(kPlayerRebufferingCount, mRebufferingEvents);
- mAnalyticsItem->setInt32(kPlayerRebufferingAtExit, mRebufferingAtExit);
- }
-
- mAnalyticsItem->setCString(kPlayerDataSourceType, mPlayer->getDataSourceType());
}
@@ -613,6 +635,9 @@
}
ALOGV("logMetrics(%p) from %s at state %d", this, where, mState);
+ // make sure that the stats are stable while we're writing them.
+ Mutex::Autolock autoLock(mMetricsLock);
+
if (mAnalyticsItem == NULL || mAnalyticsItem->isEnabled() == false) {
return;
}
@@ -775,6 +800,9 @@
// mtrX -- a play on 'metrics' (not matrix)
// gather current info all together, parcel it, and send it back
updateMetrics("api");
+
+ // make sure that the stats are static while we're writing to the parcel
+ Mutex::Autolock autoLock(mMetricsLock);
mAnalyticsItem->writeToParcel(reply);
return OK;
}
@@ -1000,11 +1028,14 @@
// ext1 is our primary 'error type' value. Only add ext2 when non-zero.
// [test against msg is due to fall through from previous switch value]
if (msg == MEDIA_ERROR) {
- mAnalyticsItem->setInt32(kPlayerError, ext1);
- if (ext2 != 0) {
- mAnalyticsItem->setInt32(kPlayerErrorCode, ext2);
+ Mutex::Autolock autoLock(mMetricsLock);
+ if (mAnalyticsItem != NULL) {
+ mAnalyticsItem->setInt32(kPlayerError, ext1);
+ if (ext2 != 0) {
+ mAnalyticsItem->setInt32(kPlayerErrorCode, ext2);
+ }
+ mAnalyticsItem->setCString(kPlayerErrorState, stateString(mState).c_str());
}
- mAnalyticsItem->setCString(kPlayerErrorState, stateString(mState).c_str());
}
mAtEOS = true;
break;
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
index ad878f8..37c53b0 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
@@ -142,6 +142,7 @@
uint32_t mPlayerFlags;
MediaAnalyticsItem *mAnalyticsItem;
+ mutable Mutex mMetricsLock;
uid_t mClientUid;
bool mAtEOS;
