Camera: Pass system health metrics to ServiceProxy

- Measure session statistics:
  - Camera open, close, and session creation latency
  - Session information such as camera id, is_ndk, operating mode,
    and reconfiguration count.
- Measure stream statistics:
  - width, height, format, dataspace, usage
  - max buffer count
  - buffer loss count
  - startup latency.

Test: ./out/host/linux-x86/bin/statsd_testdrive 227
Test: Camera CTS, VNDK test
Bug: 154159000
Change-Id: I082ef26a312bddbfd4abcc2148728a4b7bf8a9f6
diff --git a/services/camera/libcameraservice/device3/Camera3Device.cpp b/services/camera/libcameraservice/device3/Camera3Device.cpp
index d27f11f..50ef953 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.cpp
+++ b/services/camera/libcameraservice/device3/Camera3Device.cpp
@@ -61,6 +61,7 @@
 #include "CameraService.h"
 #include "utils/CameraThreadState.h"
 #include "utils/TraceHFR.h"
+#include "utils/CameraServiceProxyWrapper.h"
 
 #include <algorithm>
 #include <tuple>
@@ -867,7 +868,7 @@
 status_t Camera3Device::convertMetadataListToRequestListLocked(
         const List<const PhysicalCameraSettingsList> &metadataList,
         const std::list<const SurfaceMap> &surfaceMaps,
-        bool repeating,
+        bool repeating, nsecs_t requestTimeNs,
         RequestList *requestList) {
     if (requestList == NULL) {
         CLOGE("requestList cannot be NULL.");
@@ -886,6 +887,7 @@
         }
 
         newRequest->mRepeating = repeating;
+        newRequest->mRequestTimeNs = requestTimeNs;
 
         // Setup burst Id and request Id
         newRequest->mResultExtras.burstId = burstId++;
@@ -953,6 +955,8 @@
         /*out*/
         int64_t *lastFrameNumber) {
     ATRACE_CALL();
+    nsecs_t requestTimeNs = systemTime();
+
     Mutex::Autolock il(mInterfaceLock);
     Mutex::Autolock l(mLock);
 
@@ -965,7 +969,7 @@
     RequestList requestList;
 
     res = convertMetadataListToRequestListLocked(requests, surfaceMaps,
-            repeating, /*out*/&requestList);
+            repeating, requestTimeNs, /*out*/&requestList);
     if (res != OK) {
         // error logged by previous call
         return res;
@@ -997,7 +1001,7 @@
         const hardware::hidl_vec<hardware::camera::device::V3_5::BufferRequest>& bufReqs,
         requestStreamBuffers_cb _hidl_cb) {
     RequestBufferStates states {
-        mId, mRequestBufferInterfaceLock, mUseHalBufManager, mOutputStreams,
+        mId, mRequestBufferInterfaceLock, mUseHalBufManager, mOutputStreams, mSessionStatsBuilder,
         *this, *mInterface, *this};
     camera3::requestStreamBuffers(states, bufReqs, _hidl_cb);
     return hardware::Void();
@@ -1006,7 +1010,7 @@
 hardware::Return<void> Camera3Device::returnStreamBuffers(
         const hardware::hidl_vec<hardware::camera::device::V3_2::StreamBuffer>& buffers) {
     ReturnBufferStates states {
-        mId, mUseHalBufManager, mOutputStreams, *mInterface};
+        mId, mUseHalBufManager, mOutputStreams, mSessionStatsBuilder, *mInterface};
     camera3::returnStreamBuffers(states, buffers);
     return hardware::Void();
 }
@@ -1054,7 +1058,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, *mInterface
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        *mInterface
     };
 
     for (const auto& result : results) {
@@ -1112,7 +1117,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, *mInterface
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        *mInterface
     };
 
     for (const auto& result : results) {
@@ -1152,7 +1158,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, *mInterface
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        *mInterface
     };
     for (const auto& msg : msgs) {
         camera3::notify(states, msg);
@@ -1455,6 +1462,8 @@
         return res;
     }
 
+    mSessionStatsBuilder.addStream(mNextStreamId);
+
     *id = mNextStreamId++;
     mNeedConfig = true;
 
@@ -1578,6 +1587,7 @@
             CLOGE("Stream %d does not exist", id);
             return BAD_VALUE;
         }
+        mSessionStatsBuilder.removeStream(id);
     }
 
     // Delete output stream or the output part of a bi-directional stream.
@@ -2010,6 +2020,9 @@
         }
 
         mRequestThread->clear(/*out*/frameNumber);
+
+        // Stop session and stream counter
+        mSessionStatsBuilder.stopCounter();
     }
 
     return mRequestThread->flush();
@@ -2087,6 +2100,9 @@
 
 void Camera3Device::notifyStatus(bool idle) {
     ATRACE_CALL();
+    std::vector<int> streamIds;
+    std::vector<hardware::CameraStreamStats> streamStats;
+
     {
         // Need mLock to safely update state and synchronize to current
         // state of methods in flight.
@@ -2104,6 +2120,24 @@
         // Skip notifying listener if we're doing some user-transparent
         // state changes
         if (mPauseStateNotify) return;
+
+        // Populate stream statistics in case of Idle
+        if (idle) {
+            for (size_t i = 0; i < mOutputStreams.size(); i++) {
+                auto stream = mOutputStreams[i];
+                if (stream.get() == nullptr) continue;
+                streamIds.push_back(stream->getId());
+                Camera3Stream* camera3Stream = Camera3Stream::cast(stream->asHalStream());
+                int64_t usage = 0LL;
+                if (camera3Stream != nullptr) {
+                    usage = camera3Stream->getUsage();
+                }
+                streamStats.emplace_back(stream->getWidth(), stream->getHeight(),
+                    stream->getFormat(), stream->getDataSpace(), usage,
+                    stream->getMaxHalBuffers(),
+                    stream->getMaxTotalBuffers() - stream->getMaxHalBuffers());
+            }
+        }
     }
 
     sp<NotificationListener> listener;
@@ -2112,7 +2146,22 @@
         listener = mListener.promote();
     }
     if (idle && listener != NULL) {
-        listener->notifyIdle();
+        // Get session stats from the builder, and notify the listener.
+        int64_t requestCount, resultErrorCount;
+        bool deviceError;
+        std::map<int, StreamStats> streamStatsMap;
+        mSessionStatsBuilder.buildAndReset(&requestCount, &resultErrorCount,
+                &deviceError, &streamStatsMap);
+        for (size_t i = 0; i < streamIds.size(); i++) {
+            int streamId = streamIds[i];
+            auto stats = streamStatsMap.find(streamId);
+            if (stats != streamStatsMap.end()) {
+                streamStats[i].mRequestCount = stats->second.mRequestedFrameCount;
+                streamStats[i].mErrorCount = stats->second.mDroppedFrameCount;
+                streamStats[i].mStartLatencyMs = stats->second.mStartLatencyMs;
+            }
+        }
+        listener->notifyIdle(requestCount, resultErrorCount, deviceError, streamStats);
     }
 }
 
@@ -2222,6 +2271,12 @@
         ALOGE("%s: Stream %d is not found.", __FUNCTION__, streamId);
         return BAD_VALUE;
     }
+
+    if (dropping) {
+        mSessionStatsBuilder.stopCounter(streamId);
+    } else {
+        mSessionStatsBuilder.startCounter(streamId);
+    }
     return stream->dropBuffers(dropping);
 }
 
@@ -2376,6 +2431,8 @@
     ATRACE_CALL();
     bool ret = false;
 
+    nsecs_t startTime = systemTime();
+
     Mutex::Autolock il(mInterfaceLock);
     nsecs_t maxExpectedDuration = getExpectedInFlightDuration();
 
@@ -2423,6 +2480,9 @@
         ALOGE("%s: Failed to pause streaming: %d", __FUNCTION__, rc);
     }
 
+    CameraServiceProxyWrapper::logStreamConfigured(mId, mOperatingMode, true /*internalReconfig*/,
+        ns2ms(systemTime() - startTime));
+
     if (markClientActive) {
         mStatusTracker->markComponentActive(clientStatusId);
     }
@@ -2776,6 +2836,7 @@
     if (listener != NULL) {
         listener->notifyError(hardware::camera2::ICameraDeviceCallbacks::ERROR_CAMERA_DEVICE,
                 CaptureResultExtras());
+        mSessionStatsBuilder.onDeviceError();
     }
 
     // Save stack trace. View by dumping it later.
@@ -2792,14 +2853,14 @@
         bool hasAppCallback, nsecs_t maxExpectedDuration,
         std::set<String8>& physicalCameraIds, bool isStillCapture,
         bool isZslCapture, bool rotateAndCropAuto, const std::set<std::string>& cameraIdsWithZoom,
-        const SurfaceMap& outputSurfaces) {
+        const SurfaceMap& outputSurfaces, nsecs_t requestTimeNs) {
     ATRACE_CALL();
     std::lock_guard<std::mutex> l(mInFlightLock);
 
     ssize_t res;
     res = mInFlightMap.add(frameNumber, InFlightRequest(numBuffers, resultExtras, hasInput,
             hasAppCallback, maxExpectedDuration, physicalCameraIds, isStillCapture, isZslCapture,
-            rotateAndCropAuto, cameraIdsWithZoom, outputSurfaces));
+            rotateAndCropAuto, cameraIdsWithZoom, requestTimeNs, outputSurfaces));
     if (res < 0) return res;
 
     if (mInFlightMap.size() == 1) {
@@ -2869,7 +2930,7 @@
 
     FlushInflightReqStates states {
         mId, mInFlightLock, mInFlightMap, mUseHalBufManager,
-        listener, *this, *mInterface, *this};
+        listener, *this, *mInterface, *this, mSessionStatsBuilder};
 
     camera3::flushInflightRequests(states);
 }
@@ -3778,6 +3839,7 @@
         mInterface(interface),
         mListener(nullptr),
         mId(getId(parent)),
+        mFirstRepeating(false),
         mReconfigured(false),
         mDoPause(false),
         mPaused(true),
@@ -3908,6 +3970,7 @@
         *lastFrameNumber = mRepeatingLastFrameNumber;
     }
     mRepeatingRequests.clear();
+    mFirstRepeating = true;
     mRepeatingRequests.insert(mRepeatingRequests.begin(),
             requests.begin(), requests.end());
 
@@ -4697,7 +4760,7 @@
                 requestedPhysicalCameras, isStillCapture, isZslCapture,
                 captureRequest->mRotateAndCropAuto, mPrevCameraIdsWithZoom,
                 (mUseHalBufManager) ? uniqueSurfaceIdMap :
-                                      SurfaceMap{});
+                                      SurfaceMap{}, captureRequest->mRequestTimeNs);
         ALOGVV("%s: registered in flight requestId = %" PRId32 ", frameNumber = %" PRId64
                ", burstId = %" PRId32 ".",
                 __FUNCTION__,
@@ -5019,6 +5082,17 @@
             // list. Guarantees a complete in-sequence set of captures to
             // application.
             const RequestList &requests = mRepeatingRequests;
+            if (mFirstRepeating) {
+                mFirstRepeating = false;
+            } else {
+                for (auto& request : requests) {
+                    // For repeating requests, override timestamp request using
+                    // the time a request is inserted into the request queue,
+                    // because the original repeating request will have an old
+                    // fixed timestamp.
+                    request->mRequestTimeNs = systemTime();
+                }
+            }
             RequestList::const_iterator firstRequest =
                     requests.begin();
             nextRequest = *firstRequest;
diff --git a/services/camera/libcameraservice/device3/Camera3Device.h b/services/camera/libcameraservice/device3/Camera3Device.h
index c579071..de7df81 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.h
+++ b/services/camera/libcameraservice/device3/Camera3Device.h
@@ -471,6 +471,8 @@
 
     camera3::StreamSet         mOutputStreams;
     sp<camera3::Camera3Stream> mInputStream;
+    SessionStatsBuilder        mSessionStatsBuilder;
+
     int                        mNextStreamId;
     bool                       mNeedConfig;
 
@@ -520,6 +522,8 @@
         // Whether this capture request has its zoom ratio set to 1.0x before
         // the framework overrides it for camera HAL consumption.
         bool                                mZoomRatioIs1x;
+        // The systemTime timestamp when the request is created.
+        nsecs_t                             mRequestTimeNs;
 
 
         // Whether this capture request's distortion correction update has
@@ -538,7 +542,7 @@
     status_t convertMetadataListToRequestListLocked(
             const List<const PhysicalCameraSettingsList> &metadataList,
             const std::list<const SurfaceMap> &surfaceMaps,
-            bool repeating,
+            bool repeating, nsecs_t requestTimeNs,
             /*out*/
             RequestList *requestList);
 
@@ -961,6 +965,7 @@
         Condition          mRequestSubmittedSignal;
         RequestList        mRequestQueue;
         RequestList        mRepeatingRequests;
+        bool               mFirstRepeating;
         // The next batch of requests being prepped for submission to the HAL, no longer
         // on the request queue. Read-only even with mRequestLock held, outside
         // of threadLoop
@@ -1035,7 +1040,8 @@
             int32_t numBuffers, CaptureResultExtras resultExtras, bool hasInput,
             bool callback, nsecs_t maxExpectedDuration, std::set<String8>& physicalCameraIds,
             bool isStillCapture, bool isZslCapture, bool rotateAndCropAuto,
-            const std::set<std::string>& cameraIdsWithZoom, const SurfaceMap& outputSurfaces);
+            const std::set<std::string>& cameraIdsWithZoom, const SurfaceMap& outputSurfaces,
+            nsecs_t requestTimeNs);
 
     /**
      * Tracking for idle detection
diff --git a/services/camera/libcameraservice/device3/Camera3IOStreamBase.h b/services/camera/libcameraservice/device3/Camera3IOStreamBase.h
index 448379c..ca62239 100644
--- a/services/camera/libcameraservice/device3/Camera3IOStreamBase.h
+++ b/services/camera/libcameraservice/device3/Camera3IOStreamBase.h
@@ -48,6 +48,7 @@
 
     virtual void     dump(int fd, const Vector<String16> &args) const;
 
+    int              getMaxTotalBuffers() const { return mTotalBufferCount; }
   protected:
     size_t            mTotalBufferCount;
     // sum of input and output buffers that are currently acquired by HAL
diff --git a/services/camera/libcameraservice/device3/Camera3OfflineSession.cpp b/services/camera/libcameraservice/device3/Camera3OfflineSession.cpp
index 95f9633..a7e64ce 100644
--- a/services/camera/libcameraservice/device3/Camera3OfflineSession.cpp
+++ b/services/camera/libcameraservice/device3/Camera3OfflineSession.cpp
@@ -176,7 +176,7 @@
 
     FlushInflightReqStates states {
         mId, mOfflineReqsLock, mOfflineReqs, mUseHalBufManager,
-        listener, *this, mBufferRecords, *this};
+        listener, *this, mBufferRecords, *this, mSessionStatsBuilder};
 
     camera3::flushInflightRequests(states);
 
@@ -260,7 +260,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, mBufferRecords
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        mBufferRecords
     };
 
     std::lock_guard<std::mutex> lock(mProcessCaptureResultLock);
@@ -299,7 +300,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, mBufferRecords
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        mBufferRecords
     };
 
     std::lock_guard<std::mutex> lock(mProcessCaptureResultLock);
@@ -333,7 +335,8 @@
         mUseHalBufManager, mUsePartialResult, mNeedFixupMonochromeTags,
         mNumPartialResults, mVendorTagId, mDeviceInfo, mPhysicalDeviceInfoMap,
         mResultMetadataQueue, mDistortionMappers, mZoomRatioMappers, mRotateAndCropMappers,
-        mTagMonitor, mInputStream, mOutputStreams, listener, *this, *this, mBufferRecords
+        mTagMonitor, mInputStream, mOutputStreams, mSessionStatsBuilder, listener, *this, *this,
+        mBufferRecords
     };
     for (const auto& msg : msgs) {
         camera3::notify(states, msg);
@@ -353,7 +356,7 @@
     }
 
     RequestBufferStates states {
-        mId, mRequestBufferInterfaceLock, mUseHalBufManager, mOutputStreams,
+        mId, mRequestBufferInterfaceLock, mUseHalBufManager, mOutputStreams, mSessionStatsBuilder,
         *this, mBufferRecords, *this};
     camera3::requestStreamBuffers(states, bufReqs, _hidl_cb);
     return hardware::Void();
@@ -370,7 +373,7 @@
     }
 
     ReturnBufferStates states {
-        mId, mUseHalBufManager, mOutputStreams, mBufferRecords};
+        mId, mUseHalBufManager, mOutputStreams, mSessionStatsBuilder, mBufferRecords};
     camera3::returnStreamBuffers(states, buffers);
     return hardware::Void();
 }
diff --git a/services/camera/libcameraservice/device3/Camera3OfflineSession.h b/services/camera/libcameraservice/device3/Camera3OfflineSession.h
index ee9ed25..5581964 100644
--- a/services/camera/libcameraservice/device3/Camera3OfflineSession.h
+++ b/services/camera/libcameraservice/device3/Camera3OfflineSession.h
@@ -208,6 +208,7 @@
     sp<camera3::Camera3Stream> mInputStream;
     camera3::StreamSet mOutputStreams;
     camera3::BufferRecords mBufferRecords;
+    SessionStatsBuilder mSessionStatsBuilder;
 
     std::mutex mOfflineReqsLock;
     camera3::InFlightRequestMap mOfflineReqs;
diff --git a/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp b/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
index 90f6216..f88b062 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
+++ b/services/camera/libcameraservice/device3/Camera3OutputUtils.cpp
@@ -423,6 +423,7 @@
     InFlightRequestMap& inflightMap = states.inflightMap;
     const InFlightRequest &request = inflightMap.valueAt(idx);
     const uint32_t frameNumber = inflightMap.keyAt(idx);
+    SessionStatsBuilder& sessionStatsBuilder = states.sessionStatsBuilder;
 
     nsecs_t sensorTimestamp = request.sensorTimestamp;
     nsecs_t shutterTimestamp = request.shutterTimestamp;
@@ -459,7 +460,9 @@
         returnOutputBuffers(
             states.useHalBufManager, states.listener,
             request.pendingOutputBuffers.array(),
-            request.pendingOutputBuffers.size(), 0, /*timestampIncreasing*/true,
+            request.pendingOutputBuffers.size(), 0,
+            /*requested*/true, request.requestTimeNs, states.sessionStatsBuilder,
+            /*timestampIncreasing*/true,
             request.outputSurfaces, request.resultExtras,
             request.errorBufStrategy);
 
@@ -472,6 +475,8 @@
             states.lastCompletedRegularFrameNumber = frameNumber;
         }
 
+        sessionStatsBuilder.incResultCounter(request.skipResultMetadata);
+
         removeInFlightMapEntryLocked(states, idx);
         ALOGVV("%s: removed frame %d from InFlightMap", __FUNCTION__, frameNumber);
     }
@@ -628,7 +633,7 @@
         if (shutterTimestamp != 0) {
             returnAndRemovePendingOutputBuffers(
                 states.useHalBufManager, states.listener,
-                request);
+                request, states.sessionStatsBuilder);
         }
 
         if (result->result != NULL && !isPartialResult) {
@@ -825,7 +830,8 @@
         bool useHalBufManager,
         sp<NotificationListener> listener,
         const camera3_stream_buffer_t *outputBuffers, size_t numBuffers,
-        nsecs_t timestamp, bool timestampIncreasing,
+        nsecs_t timestamp, bool requested, nsecs_t requestTimeNs,
+        SessionStatsBuilder& sessionStatsBuilder, bool timestampIncreasing,
         const SurfaceMap& outputSurfaces,
         const CaptureResultExtras &inResultExtras,
         ERROR_BUF_STRATEGY errorBufStrategy) {
@@ -853,6 +859,10 @@
                 // has not got a output buffer handle filled yet. This is though illegal if HAL
                 // buffer management API is not being used.
                 ALOGE("%s: cannot return a null buffer!", __FUNCTION__);
+            } else {
+                if (requested) {
+                    sessionStatsBuilder.incCounter(streamId, /*dropped*/true, 0);
+                }
             }
             continue;
         }
@@ -876,10 +886,22 @@
         }
         // Note: stream may be deallocated at this point, if this buffer was
         // the last reference to it.
+        bool dropped = false;
         if (res == NO_INIT || res == DEAD_OBJECT) {
             ALOGV("Can't return buffer to its stream: %s (%d)", strerror(-res), res);
+            sessionStatsBuilder.stopCounter(streamId);
         } else if (res != OK) {
             ALOGE("Can't return buffer to its stream: %s (%d)", strerror(-res), res);
+            dropped = true;
+        } else {
+            if (outputBuffers[i].status == CAMERA3_BUFFER_STATUS_ERROR || timestamp == 0) {
+                dropped = true;
+            }
+        }
+        if (requested) {
+            nsecs_t bufferTimeNs = systemTime();
+            int32_t captureLatencyMs = ns2ms(bufferTimeNs - requestTimeNs);
+            sessionStatsBuilder.incCounter(streamId, dropped, captureLatencyMs);
         }
 
         // Long processing consumers can cause returnBuffer timeout for shared stream
@@ -889,7 +911,8 @@
             // cancel the buffer
             camera3_stream_buffer_t sb = outputBuffers[i];
             sb.status = CAMERA3_BUFFER_STATUS_ERROR;
-            stream->returnBuffer(sb, /*timestamp*/0, timestampIncreasing, std::vector<size_t> (),
+            stream->returnBuffer(sb, /*timestamp*/0,
+                    timestampIncreasing, std::vector<size_t> (),
                     inResultExtras.frameNumber);
 
             if (listener != nullptr) {
@@ -904,12 +927,14 @@
 }
 
 void returnAndRemovePendingOutputBuffers(bool useHalBufManager,
-        sp<NotificationListener> listener, InFlightRequest& request) {
+        sp<NotificationListener> listener, InFlightRequest& request,
+        SessionStatsBuilder& sessionStatsBuilder) {
     bool timestampIncreasing = !(request.zslCapture || request.hasInputBuffer);
     returnOutputBuffers(useHalBufManager, listener,
             request.pendingOutputBuffers.array(),
             request.pendingOutputBuffers.size(),
-            request.shutterTimestamp, timestampIncreasing,
+            request.shutterTimestamp, /*requested*/true,
+            request.requestTimeNs, sessionStatsBuilder, timestampIncreasing,
             request.outputSurfaces, request.resultExtras,
             request.errorBufStrategy);
 
@@ -992,7 +1017,7 @@
                     r.rotateAndCropAuto, r.cameraIdsWithZoom, r.physicalMetadatas);
             }
             returnAndRemovePendingOutputBuffers(
-                    states.useHalBufManager, states.listener, r);
+                    states.useHalBufManager, states.listener, r, states.sessionStatsBuilder);
 
             removeInFlightRequestIfReadyLocked(states, idx);
         }
@@ -1281,6 +1306,7 @@
                     ALOGV("%s: Can't get output buffer for stream %d: %s (%d)",
                             __FUNCTION__, streamId, strerror(-res), res);
                     bufRet.val.error(StreamBufferRequestError::STREAM_DISCONNECTED);
+                    states.sessionStatsBuilder.stopCounter(streamId);
                 } else {
                     ALOGE("%s: Can't get output buffer for stream %d: %s (%d)",
                             __FUNCTION__, streamId, strerror(-res), res);
@@ -1346,7 +1372,8 @@
                 sb.status = CAMERA3_BUFFER_STATUS_ERROR;
             }
             returnOutputBuffers(states.useHalBufManager, /*listener*/nullptr,
-                    streamBuffers.data(), numAllocatedBuffers, 0);
+                    streamBuffers.data(), numAllocatedBuffers, 0, /*requested*/false,
+                    /*requestTimeNs*/0, states.sessionStatsBuilder);
         }
     }
 
@@ -1403,22 +1430,23 @@
         }
         streamBuffer.stream = stream->asHalStream();
         returnOutputBuffers(states.useHalBufManager, /*listener*/nullptr,
-                &streamBuffer, /*size*/1, /*timestamp*/ 0);
+                &streamBuffer, /*size*/1, /*timestamp*/ 0, /*requested*/false,
+                /*requestTimeNs*/0, states.sessionStatsBuilder);
     }
 }
 
 void flushInflightRequests(FlushInflightReqStates& states) {
     ATRACE_CALL();
-    { // First return buffers cached in mInFlightMap
+    { // First return buffers cached in inFlightMap
         std::lock_guard<std::mutex> l(states.inflightLock);
         for (size_t idx = 0; idx < states.inflightMap.size(); idx++) {
             const InFlightRequest &request = states.inflightMap.valueAt(idx);
             returnOutputBuffers(
                 states.useHalBufManager, states.listener,
                 request.pendingOutputBuffers.array(),
-                request.pendingOutputBuffers.size(), 0,
-                /*timestampIncreasing*/true, request.outputSurfaces,
-                request.resultExtras, request.errorBufStrategy);
+                request.pendingOutputBuffers.size(), 0, /*requested*/true,
+                request.requestTimeNs, states.sessionStatsBuilder, /*timestampIncreasing*/true,
+                request.outputSurfaces, request.resultExtras, request.errorBufStrategy);
             ALOGW("%s: Frame %d |  Timestamp: %" PRId64 ", metadata"
                     " arrived: %s, buffers left: %d.\n", __FUNCTION__,
                     states.inflightMap.keyAt(idx), request.shutterTimestamp,
@@ -1490,7 +1518,8 @@
                 switch (halStream->stream_type) {
                     case CAMERA3_STREAM_OUTPUT:
                         res = stream->returnBuffer(streamBuffer, /*timestamp*/ 0,
-                                /*timestampIncreasing*/true, std::vector<size_t> (), frameNumber);
+                                /*timestampIncreasing*/true,
+                                std::vector<size_t> (), frameNumber);
                         if (res != OK) {
                             ALOGE("%s: Can't return output buffer for frame %d to"
                                   " stream %d: %s (%d)",  __FUNCTION__,
diff --git a/services/camera/libcameraservice/device3/Camera3OutputUtils.h b/services/camera/libcameraservice/device3/Camera3OutputUtils.h
index 3ebbc17..45c8a43 100644
--- a/services/camera/libcameraservice/device3/Camera3OutputUtils.h
+++ b/services/camera/libcameraservice/device3/Camera3OutputUtils.h
@@ -33,6 +33,7 @@
 #include "device3/InFlightRequest.h"
 #include "device3/Camera3Stream.h"
 #include "device3/Camera3OutputStreamInterface.h"
+#include "utils/SessionStatsBuilder.h"
 #include "utils/TagMonitor.h"
 
 namespace android {
@@ -51,7 +52,8 @@
             bool useHalBufManager,
             sp<NotificationListener> listener, // Only needed when outputSurfaces is not empty
             const camera3_stream_buffer_t *outputBuffers,
-            size_t numBuffers, nsecs_t timestamp, bool timestampIncreasing = true,
+            size_t numBuffers, nsecs_t timestamp, bool requested, nsecs_t requestTimeNs,
+            SessionStatsBuilder& sessionStatsBuilder, bool timestampIncreasing = true,
             // The following arguments are only meant for surface sharing use case
             const SurfaceMap& outputSurfaces = SurfaceMap{},
             // Used to send buffer error callback when failing to return buffer
@@ -64,7 +66,7 @@
     void returnAndRemovePendingOutputBuffers(
             bool useHalBufManager,
             sp<NotificationListener> listener, // Only needed when outputSurfaces is not empty
-            InFlightRequest& request);
+            InFlightRequest& request, SessionStatsBuilder& sessionStatsBuilder);
 
     // Camera3Device/Camera3OfflineSession internal states used in notify/processCaptureResult
     // callbacks
@@ -98,6 +100,7 @@
         TagMonitor& tagMonitor;
         sp<Camera3Stream> inputStream;
         StreamSet& outputStreams;
+        SessionStatsBuilder& sessionStatsBuilder;
         sp<NotificationListener> listener;
         SetErrorInterface& setErrIntf;
         InflightRequestUpdateInterface& inflightIntf;
@@ -121,6 +124,7 @@
         std::mutex& reqBufferLock; // lock to serialize request buffer calls
         const bool useHalBufManager;
         StreamSet& outputStreams;
+        SessionStatsBuilder& sessionStatsBuilder;
         SetErrorInterface& setErrIntf;
         BufferRecordsInterface& bufferRecordsIntf;
         RequestBufferInterface& reqBufferIntf;
@@ -134,6 +138,7 @@
         const String8& cameraId;
         const bool useHalBufManager;
         StreamSet& outputStreams;
+        SessionStatsBuilder& sessionStatsBuilder;
         BufferRecordsInterface& bufferRecordsIntf;
     };
 
@@ -149,6 +154,7 @@
         InflightRequestUpdateInterface& inflightIntf;
         BufferRecordsInterface& bufferRecordsIntf;
         FlushBufferInterface& flushBufferIntf;
+        SessionStatsBuilder& sessionStatsBuilder;
     };
 
     void flushInflightRequests(FlushInflightReqStates& states);
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.cpp b/services/camera/libcameraservice/device3/Camera3Stream.cpp
index f208561..9a8f6fe 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.cpp
+++ b/services/camera/libcameraservice/device3/Camera3Stream.cpp
@@ -152,6 +152,10 @@
     return mPhysicalCameraId;
 }
 
+int Camera3Stream::getMaxHalBuffers() const {
+    return camera3_stream::max_buffers;
+}
+
 void Camera3Stream::setOfflineProcessingSupport(bool support) {
     mSupportOfflineProcessing = support;
 }
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.h b/services/camera/libcameraservice/device3/Camera3Stream.h
index d768d3d..3654f89 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.h
+++ b/services/camera/libcameraservice/device3/Camera3Stream.h
@@ -165,6 +165,7 @@
     void              setDataSpaceOverride(bool dataSpaceOverriden);
     bool              isDataSpaceOverridden() const;
     android_dataspace getOriginalDataSpace() const;
+    int               getMaxHalBuffers() const;
     const String8&    physicalCameraId() const;
 
     void              setOfflineProcessingSupport(bool) override;
diff --git a/services/camera/libcameraservice/device3/Camera3StreamInterface.h b/services/camera/libcameraservice/device3/Camera3StreamInterface.h
index 667e3bb..a053262 100644
--- a/services/camera/libcameraservice/device3/Camera3StreamInterface.h
+++ b/services/camera/libcameraservice/device3/Camera3StreamInterface.h
@@ -99,6 +99,8 @@
     virtual void setDataSpaceOverride(bool dataSpaceOverriden) = 0;
     virtual bool isDataSpaceOverridden() const = 0;
     virtual android_dataspace getOriginalDataSpace() const = 0;
+    virtual int getMaxHalBuffers() const = 0;
+    virtual int getMaxTotalBuffers() const = 0;
 
     /**
      * Offline processing
diff --git a/services/camera/libcameraservice/device3/InFlightRequest.h b/services/camera/libcameraservice/device3/InFlightRequest.h
index da4f228..c7b7475 100644
--- a/services/camera/libcameraservice/device3/InFlightRequest.h
+++ b/services/camera/libcameraservice/device3/InFlightRequest.h
@@ -115,6 +115,9 @@
     // Requested camera ids (both logical and physical) with zoomRatio != 1.0f
     std::set<std::string> cameraIdsWithZoom;
 
+    // Time of capture request (from systemTime) in Ns
+    nsecs_t requestTimeNs;
+
     // What shared surfaces an output should go to
     SurfaceMap outputSurfaces;
 
@@ -135,14 +138,15 @@
             errorBufStrategy(ERROR_BUF_CACHE),
             stillCapture(false),
             zslCapture(false),
-            rotateAndCropAuto(false) {
+            rotateAndCropAuto(false),
+            requestTimeNs(0) {
     }
 
     InFlightRequest(int numBuffers, CaptureResultExtras extras, bool hasInput,
             bool hasAppCallback, nsecs_t maxDuration,
             const std::set<String8>& physicalCameraIdSet, bool isStillCapture,
             bool isZslCapture, bool rotateAndCropAuto, const std::set<std::string>& idsWithZoom,
-            const SurfaceMap& outSurfaces = SurfaceMap{}) :
+            nsecs_t requestNs, const SurfaceMap& outSurfaces = SurfaceMap{}) :
             shutterTimestamp(0),
             sensorTimestamp(0),
             requestStatus(OK),
@@ -159,6 +163,7 @@
             zslCapture(isZslCapture),
             rotateAndCropAuto(rotateAndCropAuto),
             cameraIdsWithZoom(idsWithZoom),
+            requestTimeNs(requestNs),
             outputSurfaces(outSurfaces) {
     }
 };