125 lines
4.1 KiB
C++
125 lines
4.1 KiB
C++
/*
|
|
* 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 {
|
|
// 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 */
|