143 lines
4.7 KiB
C++
143 lines
4.7 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "CameraUtils"
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//#define LOG_NDEBUG 0
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#include <camera/CameraUtils.h>
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#include <camera/camera2/OutputConfiguration.h>
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#include <media/hardware/HardwareAPI.h>
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#include <android-base/properties.h>
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#include <system/window.h>
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#include <system/graphics.h>
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#include <utils/Log.h>
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namespace android {
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const char *kCameraServiceDisabledProperty = "config.disable_cameraservice";
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status_t CameraUtils::getRotationTransform(const CameraMetadata& staticInfo,
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int mirrorMode, /*out*/int32_t* transform) {
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ALOGV("%s", __FUNCTION__);
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if (transform == NULL) {
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ALOGW("%s: null transform", __FUNCTION__);
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return BAD_VALUE;
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}
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*transform = 0;
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camera_metadata_ro_entry_t entry = staticInfo.find(ANDROID_SENSOR_ORIENTATION);
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if (entry.count == 0) {
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ALOGE("%s: Can't find android.sensor.orientation in static metadata!", __FUNCTION__);
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return INVALID_OPERATION;
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}
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camera_metadata_ro_entry_t entryFacing = staticInfo.find(ANDROID_LENS_FACING);
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if (entryFacing.count == 0) {
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ALOGE("%s: Can't find android.lens.facing in static metadata!", __FUNCTION__);
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return INVALID_OPERATION;
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}
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int32_t& flags = *transform;
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int32_t mirror = 0;
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if (mirrorMode == OutputConfiguration::MIRROR_MODE_AUTO &&
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entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT) {
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mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
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} else if (mirrorMode == OutputConfiguration::MIRROR_MODE_H) {
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mirror = NATIVE_WINDOW_TRANSFORM_FLIP_H;
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} else if (mirrorMode == OutputConfiguration::MIRROR_MODE_V) {
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mirror = NATIVE_WINDOW_TRANSFORM_FLIP_V;
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}
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int orientation = entry.data.i32[0];
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if (mirror == 0) {
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switch (orientation) {
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case 0:
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flags = 0;
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break;
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case 90:
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flags = NATIVE_WINDOW_TRANSFORM_ROT_90;
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break;
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case 180:
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flags = NATIVE_WINDOW_TRANSFORM_ROT_180;
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break;
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case 270:
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flags = NATIVE_WINDOW_TRANSFORM_ROT_270;
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break;
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default:
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ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
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__FUNCTION__, orientation);
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return INVALID_OPERATION;
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}
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} else {
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// - Front camera needs to be horizontally flipped for mirror-like behavior.
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// - Application-specified mirroring needs to be applied.
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// Note: Flips are applied before rotates; using XOR here as some of these flags are
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// composed in terms of other flip/rotation flags, and are not bitwise-ORable.
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switch (orientation) {
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case 0:
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flags = mirror;
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break;
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case 90:
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flags = mirror ^
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NATIVE_WINDOW_TRANSFORM_ROT_270;
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break;
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case 180:
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flags = mirror ^
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NATIVE_WINDOW_TRANSFORM_ROT_180;
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break;
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case 270:
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flags = mirror ^
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NATIVE_WINDOW_TRANSFORM_ROT_90;
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break;
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default:
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ALOGE("%s: Invalid HAL android.sensor.orientation value: %d",
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__FUNCTION__, orientation);
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return INVALID_OPERATION;
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}
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}
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/**
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* This magic flag makes surfaceflinger un-rotate the buffers
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* to counter the extra global device UI rotation whenever the user
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* physically rotates the device.
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*
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* By doing this, the camera buffer always ends up aligned
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* with the physical camera for a "see through" effect.
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*
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* In essence, the buffer only gets rotated during preview use-cases.
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* The user is still responsible to re-create streams of the proper
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* aspect ratio, or the preview will end up looking non-uniformly
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* stretched.
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*/
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flags |= NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
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ALOGV("%s: final transform = 0x%x", __FUNCTION__, flags);
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return OK;
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}
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bool CameraUtils::isCameraServiceDisabled() {
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return base::GetBoolProperty(kCameraServiceDisabledProperty, false);
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}
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} /* namespace android */
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