camera2: Set orientation flags for hardware composer.
Bug: 15116722
Change-Id: I3fcc9aea38afcbd665f86c511a9929fe9a6a3a8f
diff --git a/camera/CameraUtils.cpp b/camera/CameraUtils.cpp
new file mode 100644
index 0000000..3ff181d
--- /dev/null
+++ b/camera/CameraUtils.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "CameraUtils"
+//#define LOG_NDEBUG 0
+
+#include <camera/CameraUtils.h>
+
+#include <system/window.h>
+#include <system/graphics.h>
+
+#include <utils/Log.h>
+
+namespace android {
+
+status_t CameraUtils::getRotationTransform(const CameraMetadata& staticInfo,
+ /*out*/int32_t* transform) {
+ ALOGV("%s", __FUNCTION__);
+
+ if (transform == NULL) {
+ ALOGW("%s: null transform", __FUNCTION__);
+ return BAD_VALUE;
+ }
+
+ *transform = 0;
+
+ camera_metadata_ro_entry_t entry = staticInfo.find(ANDROID_SENSOR_ORIENTATION);
+ if (entry.count == 0) {
+ ALOGE("%s: Can't find android.sensor.orientation in static metadata!", __FUNCTION__);
+ return INVALID_OPERATION;
+ }
+
+ camera_metadata_ro_entry_t entryFacing = staticInfo.find(ANDROID_LENS_FACING);
+ if (entry.count == 0) {
+ ALOGE("%s: Can't find android.lens.facing in static metadata!", __FUNCTION__);
+ return INVALID_OPERATION;
+ }
+
+ int32_t& flags = *transform;
+
+ bool mirror = (entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT);
+ int orientation = entry.data.i32[0];
+ if (!mirror) {
+ switch (orientation) {
+ case 0:
+ flags = 0;
+ break;
+ case 90:
+ flags = NATIVE_WINDOW_TRANSFORM_ROT_90;
+ break;
+ case 180:
+ flags = NATIVE_WINDOW_TRANSFORM_ROT_180;
+ break;
+ case 270:
+ flags = NATIVE_WINDOW_TRANSFORM_ROT_270;
+ break;
+ default:
+ ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
+ __FUNCTION__, orientation);
+ return INVALID_OPERATION;
+ }
+ } else {
+ switch (orientation) {
+ case 0:
+ flags = HAL_TRANSFORM_FLIP_H;
+ break;
+ case 90:
+ flags = HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90;
+ break;
+ case 180:
+ flags = HAL_TRANSFORM_FLIP_V;
+ break;
+ case 270:
+ flags = HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90;
+ break;
+ default:
+ ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
+ __FUNCTION__, orientation);
+ return INVALID_OPERATION;
+ }
+
+ }
+
+ /**
+ * This magic flag makes surfaceflinger un-rotate the buffers
+ * to counter the extra global device UI rotation whenever the user
+ * physically rotates the device.
+ *
+ * By doing this, the camera buffer always ends up aligned
+ * with the physical camera for a "see through" effect.
+ *
+ * In essence, the buffer only gets rotated during preview use-cases.
+ * The user is still responsible to re-create streams of the proper
+ * aspect ratio, or the preview will end up looking non-uniformly
+ * stretched.
+ */
+ flags |= NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
+
+ ALOGV("%s: final transform = 0x%x", __FUNCTION__, flags);
+
+ return OK;
+}
+
+
+} /* namespace android */