commit 610d7b80a30065d557c9ad04847eaf098c1fb075
author Shuzhen Wang <shuzhenwang@google.com> Tue Feb 08 14:37:22 2022 -0800
committer Shuzhen Wang <shuzhenwang@google.com> Wed Feb 09 23:47:05 2022 -0800
tree 1e5a71b6ccfaf36e1c90afde731f89f6af7bcc61
parent 0fecd10b5c2408c54a7c14a43f278212def0ce73

Camera: Plumb through stream mirroring mode

The stream mirroring mode is used to override the default flip for front
facing camera.

Test: Camera CTS
Bug: 200309079
Change-Id: I161875ccf33267686d54ba3c1c94b597032bd4e8

camera/CameraUtils.cpp

diff --git a/camera/CameraUtils.cpp b/camera/CameraUtils.cpp
index af3c492..3473780 100644
--- a/camera/CameraUtils.cpp
+++ b/camera/CameraUtils.cpp
@@ -18,6 +18,7 @@
 //#define LOG_NDEBUG 0
 
 #include <camera/CameraUtils.h>
+#include <camera/camera2/OutputConfiguration.h>
 #include <media/hardware/HardwareAPI.h>
 
 #include <android-base/properties.h>
@@ -31,7 +32,7 @@
 const char *kCameraServiceDisabledProperty = "config.disable_cameraservice";
 
 status_t CameraUtils::getRotationTransform(const CameraMetadata& staticInfo,
-                /*out*/int32_t* transform) {
+        int mirrorMode, /*out*/int32_t* transform) {
     ALOGV("%s", __FUNCTION__);
 
     if (transform == NULL) {
@@ -55,9 +56,18 @@
 
     int32_t& flags = *transform;
 
-    bool mirror = (entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT);
+    int32_t mirror = 0;
+    if (mirrorMode == OutputConfiguration::MIRROR_MODE_AUTO &&
+            entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT) {
+        mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
+    } else if (mirrorMode == OutputConfiguration::MIRROR_MODE_H) {
+        mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
+    } else if (mirrorMode == OutputConfiguration::MIRROR_MODE_V) {
+        mirror = NATIVE_WINDOW_TRANSFORM_FLIP_V;
+    }
+
     int orientation = entry.data.i32[0];
-    if (!mirror) {
+    if (mirror == 0) {
         switch (orientation) {
             case 0:
                 flags = 0;
@@ -77,25 +87,25 @@
                 return INVALID_OPERATION;
         }
     } else {
-        // Front camera needs to be horizontally flipped for mirror-like behavior.
+        // - Front camera needs to be horizontally flipped for mirror-like behavior.
+        // - Application-specified mirroring needs to be applied.
         // Note: Flips are applied before rotates; using XOR here as some of these flags are
         // composed in terms of other flip/rotation flags, and are not bitwise-ORable.
         switch (orientation) {
             case 0:
-                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H;
+                flags = mirror;
                 break;
             case 90:
-                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
+                flags = mirror ^
                         NATIVE_WINDOW_TRANSFORM_ROT_270;
                 break;
             case 180:
-                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
+                flags = mirror ^
                         NATIVE_WINDOW_TRANSFORM_ROT_180;
                 break;
             case 270:
-                flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^
+                flags = mirror ^
                         NATIVE_WINDOW_TRANSFORM_ROT_90;
-
                 break;
             default:
                 ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",