9158825f9c
Refactored the directory structure so that services can be optionally excluded. This is step 1. Will be followed by another change that makes it possible to remove services from the build. Change-Id: Ideacedfd34b5e213217ad3ff4ebb21c4a8e73f85
151 lines
3.9 KiB
C++
151 lines
3.9 KiB
C++
/*
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* Copyright (C) 2012 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 __STDC_LIMIT_MACROS
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#define LOG_TAG "common_time"
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#include <utils/Log.h>
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#include <stdint.h>
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#include <utils/Errors.h>
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#include <utils/LinearTransform.h>
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#include "common_clock.h"
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namespace android {
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CommonClock::CommonClock() {
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cur_slew_ = 0;
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cur_trans_valid_ = false;
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cur_trans_.a_zero = 0;
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cur_trans_.b_zero = 0;
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cur_trans_.a_to_b_numer = local_to_common_freq_numer_ = 1;
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cur_trans_.a_to_b_denom = local_to_common_freq_denom_ = 1;
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duration_trans_ = cur_trans_;
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}
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bool CommonClock::init(uint64_t local_freq) {
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Mutex::Autolock lock(&lock_);
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if (!local_freq)
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return false;
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uint64_t numer = kCommonFreq;
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uint64_t denom = local_freq;
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LinearTransform::reduce(&numer, &denom);
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if ((numer > UINT32_MAX) || (denom > UINT32_MAX)) {
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ALOGE("Overflow in CommonClock::init while trying to reduce %lld/%lld",
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kCommonFreq, local_freq);
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return false;
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}
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cur_trans_.a_to_b_numer = local_to_common_freq_numer_ =
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static_cast<uint32_t>(numer);
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cur_trans_.a_to_b_denom = local_to_common_freq_denom_ =
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static_cast<uint32_t>(denom);
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duration_trans_ = cur_trans_;
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return true;
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}
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status_t CommonClock::localToCommon(int64_t local, int64_t *common_out) const {
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Mutex::Autolock lock(&lock_);
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if (!cur_trans_valid_)
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return INVALID_OPERATION;
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if (!cur_trans_.doForwardTransform(local, common_out))
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return INVALID_OPERATION;
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return OK;
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}
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status_t CommonClock::commonToLocal(int64_t common, int64_t *local_out) const {
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Mutex::Autolock lock(&lock_);
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if (!cur_trans_valid_)
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return INVALID_OPERATION;
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if (!cur_trans_.doReverseTransform(common, local_out))
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return INVALID_OPERATION;
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return OK;
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}
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int64_t CommonClock::localDurationToCommonDuration(int64_t localDur) const {
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int64_t ret;
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duration_trans_.doForwardTransform(localDur, &ret);
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return ret;
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}
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void CommonClock::setBasis(int64_t local, int64_t common) {
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Mutex::Autolock lock(&lock_);
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cur_trans_.a_zero = local;
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cur_trans_.b_zero = common;
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cur_trans_valid_ = true;
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}
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void CommonClock::resetBasis() {
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Mutex::Autolock lock(&lock_);
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cur_trans_.a_zero = 0;
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cur_trans_.b_zero = 0;
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cur_trans_valid_ = false;
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}
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status_t CommonClock::setSlew(int64_t change_time, int32_t ppm) {
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Mutex::Autolock lock(&lock_);
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int64_t new_local_basis;
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int64_t new_common_basis;
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if (cur_trans_valid_) {
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new_local_basis = change_time;
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if (!cur_trans_.doForwardTransform(change_time, &new_common_basis)) {
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ALOGE("Overflow when attempting to set slew rate to %d", ppm);
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return INVALID_OPERATION;
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}
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} else {
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new_local_basis = 0;
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new_common_basis = 0;
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}
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cur_slew_ = ppm;
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uint32_t n1 = local_to_common_freq_numer_;
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uint32_t n2 = 1000000 + cur_slew_;
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uint32_t d1 = local_to_common_freq_denom_;
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uint32_t d2 = 1000000;
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// n1/d1 has already been reduced, no need to do so here.
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LinearTransform::reduce(&n1, &d2);
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LinearTransform::reduce(&n2, &d1);
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LinearTransform::reduce(&n2, &d2);
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cur_trans_.a_zero = new_local_basis;
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cur_trans_.b_zero = new_common_basis;
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cur_trans_.a_to_b_numer = n1 * n2;
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cur_trans_.a_to_b_denom = d1 * d2;
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return OK;
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}
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} // namespace android
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