Camera2: Report getMaxNumFocusAreas 0 for fixed focus cameras

Bug: 7298805
Change-Id: I7499b80a9416bf454c8ea80c31ea4fdd3c4ee2d7

2 files changed, 25 insertions, 7 deletions

diff --git a/services/camera/libcameraservice/camera2/Parameters.cpp b/services/camera/libcameraservice/camera2/Parameters.cpp
index 1b15a1c..809768c 100644
--- a/services/camera/libcameraservice/camera2/Parameters.cpp
+++ b/services/camera/libcameraservice/camera2/Parameters.cpp
@@ -635,8 +635,11 @@ status_t Parameters::initialize(const CameraMetadata *info) {
         staticInfo(ANDROID_CONTROL_MAX_REGIONS, 1, 1);
     if (!max3aRegions.count) return NO_INIT;
 
-    params.set(CameraParameters::KEY_MAX_NUM_FOCUS_AREAS,
-            max3aRegions.data.i32[0]);
+    int32_t maxNumFocusAreas = 0;
+    if (focusMode != Parameters::FOCUS_MODE_FIXED) {
+        maxNumFocusAreas = max3aRegions.data.i32[0];
+    }
+    params.set(CameraParameters::KEY_MAX_NUM_FOCUS_AREAS, maxNumFocusAreas);
     params.set(CameraParameters::KEY_FOCUS_AREAS,
             "(0,0,0,0,0)");
     focusingAreas.clear();
@@ -1466,7 +1469,7 @@ status_t Parameters::set(const String8& paramString) {
     size_t max3aRegions =
         (size_t)staticInfo(ANDROID_CONTROL_MAX_REGIONS, 1, 1).data.i32[0];
     if (res == OK) res = validateAreas(validatedParams.focusingAreas,
-            max3aRegions);
+            max3aRegions, AREA_KIND_FOCUS);
     if (res != OK) {
         ALOGE("%s: Requested focus areas are malformed: %s",
                 __FUNCTION__, newParams.get(CameraParameters::KEY_FOCUS_AREAS));
@@ -1499,7 +1502,8 @@ status_t Parameters::set(const String8& paramString) {
     res = parseAreas(newParams.get(CameraParameters::KEY_METERING_AREAS),
             &validatedParams.meteringAreas);
     if (res == OK) {
-        res = validateAreas(validatedParams.meteringAreas, max3aRegions);
+        res = validateAreas(validatedParams.meteringAreas, max3aRegions,
+                            AREA_KIND_METERING);
     }
     if (res != OK) {
         ALOGE("%s: Requested metering areas are malformed: %s",
@@ -2111,7 +2115,8 @@ status_t Parameters::parseAreas(const char *areasCStr,
 }
 
 status_t Parameters::validateAreas(const Vector<Parameters::Area> &areas,
-                                      size_t maxRegions) {
+                                      size_t maxRegions,
+                                      AreaKind areaKind) const {
     // Definition of valid area can be found in
     // include/camera/CameraParameters.h
     if (areas.size() == 0) return BAD_VALUE;
@@ -2125,6 +2130,12 @@ status_t Parameters::validateAreas(const Vector<Parameters::Area> &areas,
             return OK;
         }
     }
+
+    // fixed focus can only set (0,0,0,0,0) focus area
+    if (areaKind == AREA_KIND_FOCUS && focusMode == FOCUS_MODE_FIXED) {
+        return BAD_VALUE;
+    }
+
     if (areas.size() > maxRegions) {
         ALOGE("%s: Too many areas requested: %d",
                 __FUNCTION__, areas.size());
diff --git a/services/camera/libcameraservice/camera2/Parameters.h b/services/camera/libcameraservice/camera2/Parameters.h
index daae7c4..fd02744 100644
--- a/services/camera/libcameraservice/camera2/Parameters.h
+++ b/services/camera/libcameraservice/camera2/Parameters.h
@@ -258,8 +258,15 @@ struct Parameters {
     static const char* focusModeEnumToString(focusMode_t focusMode);
     static status_t parseAreas(const char *areasCStr,
             Vector<Area> *areas);
-    static status_t validateAreas(const Vector<Area> &areas,
-                                  size_t maxRegions);
+
+    enum AreaKind
+    {
+        AREA_KIND_FOCUS,
+        AREA_KIND_METERING
+    };
+    status_t validateAreas(const Vector<Area> &areas,
+                                  size_t maxRegions,
+                                  AreaKind areaKind) const;
     static bool boolFromString(const char *boolStr);
 
     // Map from camera orientation + facing to gralloc transform enum