| /* |
| * 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 <media/hardware/HardwareAPI.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 { |
| // Front camera needs to be horizontally flipped for mirror-like behavior. |
| // 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; |
| break; |
| case 90: |
| flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^ |
| NATIVE_WINDOW_TRANSFORM_ROT_270; |
| break; |
| case 180: |
| flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^ |
| NATIVE_WINDOW_TRANSFORM_ROT_180; |
| break; |
| case 270: |
| flags = NATIVE_WINDOW_TRANSFORM_FLIP_H ^ |
| NATIVE_WINDOW_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 */ |