Camera2: Improve quirks focusing behavior.

- When scene mode is set and the AF quirk is in use, don't change AF
mode and then cancel when AF cancel is received. Just change mode
since that also implies a cancel.

- Only trigger quirks switch when a focusing area is set.

Bug: 7318812
Change-Id: I28d8755553bd78052e774701210cb94d84ee2046

2 files changed, 9 insertions, 2 deletions

diff --git a/services/camera/libcameraservice/Camera2Client.cpp b/services/camera/libcameraservice/Camera2Client.cpp
index c5ea3ed..98332f9 100644
--- a/services/camera/libcameraservice/Camera2Client.cpp
+++ b/services/camera/libcameraservice/Camera2Client.cpp
@@ -1007,7 +1007,8 @@ status_t Camera2Client::autoFocus() {
          */
         if (l.mParameters.quirks.triggerAfWithAuto &&
                 l.mParameters.sceneMode != ANDROID_CONTROL_SCENE_MODE_UNSUPPORTED &&
-                l.mParameters.focusMode != Parameters::FOCUS_MODE_AUTO) {
+                l.mParameters.focusMode != Parameters::FOCUS_MODE_AUTO &&
+                !l.mParameters.focusingAreas[0].isEmpty()) {
             ALOGV("%s: Quirk: Switching from focusMode %d to AUTO",
                     __FUNCTION__, l.mParameters.focusMode);
             l.mParameters.shadowFocusMode = l.mParameters.focusMode;
@@ -1038,13 +1039,16 @@ status_t Camera2Client::cancelAutoFocus() {
         triggerId = ++l.mParameters.afTriggerCounter;
 
         // When using triggerAfWithAuto quirk, may need to reset focus mode to
-        // the real state at this point.
+        // the real state at this point. No need to cancel explicitly if
+        // changing the AF mode.
         if (l.mParameters.shadowFocusMode != Parameters::FOCUS_MODE_INVALID) {
             ALOGV("%s: Quirk: Restoring focus mode to %d", __FUNCTION__,
                     l.mParameters.shadowFocusMode);
             l.mParameters.focusMode = l.mParameters.shadowFocusMode;
             l.mParameters.shadowFocusMode = Parameters::FOCUS_MODE_INVALID;
             updateRequests(l.mParameters);
+
+            return OK;
         }
     }
     syncWithDevice();
diff --git a/services/camera/libcameraservice/camera2/Parameters.h b/services/camera/libcameraservice/camera2/Parameters.h
index 8a8645e..54b1e8c 100644
--- a/services/camera/libcameraservice/camera2/Parameters.h
+++ b/services/camera/libcameraservice/camera2/Parameters.h
@@ -100,6 +100,9 @@ struct Parameters {
         Area(int left, int top, int right, int bottom, int weight):
                 left(left), top(top), right(right), bottom(bottom),
                 weight(weight) {}
+        bool isEmpty() const {
+            return (left == 0) && (top == 0) && (right == 0) && (bottom == 0);
+        }
     };
     Vector<Area> focusingAreas;