67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
/*
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* Copyright 2015 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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#include "FifoControllerBase.h"
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#include <cassert>
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#include <sys/types.h>
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#include "FifoControllerBase.h"
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#include "common/OboeDebug.h"
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namespace oboe {
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FifoControllerBase::FifoControllerBase(uint32_t totalFrames, uint32_t threshold)
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: mTotalFrames(totalFrames)
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, mThreshold(threshold)
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{
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}
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FifoControllerBase::~FifoControllerBase() {
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}
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int32_t FifoControllerBase::getFullFramesAvailable() {
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return static_cast<int32_t>(getWriteCounter() - getReadCounter());
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}
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uint32_t FifoControllerBase::getReadIndex() {
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return static_cast<uint32_t>(getReadCounter() % mTotalFrames);
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}
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void FifoControllerBase::advanceReadIndex(int numFrames) {
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setReadCounter(getReadCounter() + numFrames);
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}
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int32_t FifoControllerBase::getEmptyFramesAvailable() {
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int32_t fullFramesAvailable = getFullFramesAvailable();
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int32_t available = static_cast<int32_t>(mThreshold - fullFramesAvailable);
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return available;
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}
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uint32_t FifoControllerBase::getWriteIndex() {
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return static_cast<uint32_t>(getWriteCounter() % mTotalFrames); // % works with non-power of two sizes
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}
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void FifoControllerBase::advanceWriteIndex(uint32_t numFrames) {
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setWriteCounter(getWriteCounter() + numFrames);
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}
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void FifoControllerBase::setThreshold(uint32_t threshold) {
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mThreshold = threshold;
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}
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} // namespace oboe
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