mirror of
https://github.com/hajimehoshi/ebiten.git
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97 lines
2.7 KiB
C++
Vendored
97 lines
2.7 KiB
C++
Vendored
/*
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* Copyright (C) 2016 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_STREAM_BUFFERED_H
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#define OBOE_STREAM_BUFFERED_H
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#include <cstring>
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#include <cassert>
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#include "oboe_common_OboeDebug_android.h"
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#include "oboe_oboe_AudioStream_android.h"
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#include "oboe_oboe_AudioStreamCallback_android.h"
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#include "oboe_fifo_FifoBuffer_android.h"
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namespace oboe {
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// A stream that contains a FIFO buffer.
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// This is used to implement blocking reads and writes.
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class AudioStreamBuffered : public AudioStream {
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public:
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AudioStreamBuffered();
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explicit AudioStreamBuffered(const AudioStreamBuilder &builder);
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void allocateFifo();
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ResultWithValue<int32_t> write(const void *buffer,
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int32_t numFrames,
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int64_t timeoutNanoseconds) override;
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ResultWithValue<int32_t> read(void *buffer,
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int32_t numFrames,
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int64_t timeoutNanoseconds) override;
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ResultWithValue<int32_t> setBufferSizeInFrames(int32_t requestedFrames) override;
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int32_t getBufferCapacityInFrames() const override;
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ResultWithValue<int32_t> getXRunCount() override {
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return ResultWithValue<int32_t>(mXRunCount);
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}
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bool isXRunCountSupported() const override;
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protected:
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DataCallbackResult onDefaultCallback(void *audioData, int numFrames) override;
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// If there is no callback then we need a FIFO between the App and OpenSL ES.
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bool usingFIFO() const { return !isDataCallbackSpecified(); }
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virtual Result updateServiceFrameCounter() = 0;
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void updateFramesRead() override;
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void updateFramesWritten() override;
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private:
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int64_t predictNextCallbackTime();
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void markCallbackTime(int32_t numFrames);
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// Read or write to the FIFO.
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// Only pass one pointer and set the other to nullptr.
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ResultWithValue<int32_t> transfer(void *readBuffer,
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const void *writeBuffer,
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int32_t numFrames,
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int64_t timeoutNanoseconds);
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void incrementXRunCount() {
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++mXRunCount;
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}
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std::unique_ptr<FifoBuffer> mFifoBuffer{};
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int64_t mBackgroundRanAtNanoseconds = 0;
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int32_t mLastBackgroundSize = 0;
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int32_t mXRunCount = 0;
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};
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} // namespace oboe
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#endif //OBOE_STREAM_BUFFERED_H
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