105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
/*
|
|
* Copyright (C) 2023 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.
|
|
*/
|
|
|
|
#include <log/log.h>
|
|
|
|
#include "AFStateMachine.h"
|
|
|
|
namespace android {
|
|
namespace hardware {
|
|
namespace camera {
|
|
namespace provider {
|
|
namespace implementation {
|
|
namespace hw {
|
|
|
|
constexpr char kClass[] = "AFStateMachine";
|
|
|
|
using namespace std::chrono_literals;
|
|
|
|
AFStateMachine::AFStateMachine(int afDurationMs, float focused, float unfocused)
|
|
: afDuration(1ms * afDurationMs)
|
|
, focusedDistance(focused)
|
|
, unfocusedDistance(unfocused)
|
|
{}
|
|
|
|
std::pair<camera_metadata_enum_android_control_af_state_t, float>
|
|
AFStateMachine::operator()(const camera_metadata_enum_android_control_af_mode_t mode,
|
|
const camera_metadata_enum_android_control_af_trigger_t trigger) {
|
|
switch (mode) {
|
|
default:
|
|
ALOGW("%s:%s:%d unexpected mode=%d", kClass, __func__, __LINE__, mode);
|
|
[[fallthrough]];
|
|
|
|
case ANDROID_CONTROL_AF_MODE_OFF:
|
|
state = ANDROID_CONTROL_AF_STATE_INACTIVE;
|
|
return {ANDROID_CONTROL_AF_STATE_INACTIVE, unfocusedDistance};
|
|
|
|
case ANDROID_CONTROL_AF_MODE_AUTO:
|
|
switch (trigger) {
|
|
default:
|
|
ALOGW("%s:%s:%d unexpected trigger=%d", kClass, __func__, __LINE__, trigger);
|
|
[[fallthrough]];
|
|
|
|
case ANDROID_CONTROL_AF_TRIGGER_IDLE:
|
|
return doAF();
|
|
|
|
case ANDROID_CONTROL_AF_TRIGGER_START:
|
|
state = ANDROID_CONTROL_AF_STATE_ACTIVE_SCAN;
|
|
afLockedT = std::chrono::steady_clock::now() + afDuration;
|
|
return {ANDROID_CONTROL_AF_STATE_ACTIVE_SCAN, unfocusedDistance};
|
|
|
|
case ANDROID_CONTROL_AF_TRIGGER_CANCEL:
|
|
state = ANDROID_CONTROL_AF_STATE_INACTIVE;
|
|
return {ANDROID_CONTROL_AF_STATE_INACTIVE, unfocusedDistance};
|
|
}
|
|
}
|
|
}
|
|
|
|
std::pair<camera_metadata_enum_android_control_af_state_t, float>
|
|
AFStateMachine::operator()() {
|
|
return doAF();
|
|
}
|
|
|
|
std::pair<camera_metadata_enum_android_control_af_state_t, float>
|
|
AFStateMachine::doAF() {
|
|
switch (state) {
|
|
default:
|
|
ALOGW("%s:%s:%d unexpected state=%d", kClass, __func__, __LINE__, state);
|
|
[[fallthrough]];
|
|
|
|
case ANDROID_CONTROL_AF_STATE_INACTIVE:
|
|
return {ANDROID_CONTROL_AF_STATE_INACTIVE, unfocusedDistance};
|
|
|
|
case ANDROID_CONTROL_AF_STATE_ACTIVE_SCAN:
|
|
if (std::chrono::steady_clock::now() >= afLockedT) {
|
|
state = ANDROID_CONTROL_AF_STATE_FOCUSED_LOCKED;
|
|
return {ANDROID_CONTROL_AF_STATE_FOCUSED_LOCKED, focusedDistance};
|
|
} else {
|
|
return {ANDROID_CONTROL_AF_STATE_ACTIVE_SCAN, unfocusedDistance};
|
|
}
|
|
|
|
case ANDROID_CONTROL_AF_STATE_FOCUSED_LOCKED:
|
|
return {ANDROID_CONTROL_AF_STATE_FOCUSED_LOCKED, focusedDistance};
|
|
}
|
|
}
|
|
|
|
} // namespace hw
|
|
} // namespace implementation
|
|
} // namespace provider
|
|
} // namespace camera
|
|
} // namespace hardware
|
|
} // namespace android
|