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https://github.com/hajimehoshi/ebiten.git
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76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
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/*
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* Copyright 2018 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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#ifndef OBOE_STABILIZEDCALLBACK_H
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#define OBOE_STABILIZEDCALLBACK_H
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#include <cstdint>
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#include "oboe_oboe_AudioStream_android.h"
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namespace oboe {
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class StabilizedCallback : public AudioStreamCallback {
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public:
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explicit StabilizedCallback(AudioStreamCallback *callback);
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DataCallbackResult
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onAudioReady(AudioStream *oboeStream, void *audioData, int32_t numFrames) override;
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void onErrorBeforeClose(AudioStream *oboeStream, Result error) override {
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return mCallback->onErrorBeforeClose(oboeStream, error);
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}
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void onErrorAfterClose(AudioStream *oboeStream, Result error) override {
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// Reset all fields now that the stream has been closed
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mFrameCount = 0;
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mEpochTimeNanos = 0;
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mOpsPerNano = 1;
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return mCallback->onErrorAfterClose(oboeStream, error);
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}
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private:
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AudioStreamCallback *mCallback = nullptr;
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int64_t mFrameCount = 0;
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int64_t mEpochTimeNanos = 0;
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double mOpsPerNano = 1;
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void generateLoad(int64_t durationNanos);
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};
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/**
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* cpu_relax is an architecture specific method of telling the CPU that you don't want it to
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* do much work. asm volatile keeps the compiler from optimising these instructions out.
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*/
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#if defined(__i386__) || defined(__x86_64__)
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#define cpu_relax() asm volatile("rep; nop" ::: "memory");
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#elif defined(__arm__) || defined(__mips__)
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#define cpu_relax() asm volatile("":::"memory")
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#elif defined(__aarch64__)
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#define cpu_relax() asm volatile("yield" ::: "memory")
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#else
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#error "cpu_relax is not defined for this architecture"
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#endif
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}
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#endif //OBOE_STABILIZEDCALLBACK_H
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