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56 lines
1.6 KiB
56 lines
1.6 KiB
4 months ago
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/*
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* Copyright (C) 2017 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 AAUDIO_AAUDIO_MIXER_H
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#define AAUDIO_AAUDIO_MIXER_H
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#include <stdint.h>
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#include <aaudio/AAudio.h>
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#include <fifo/FifoBuffer.h>
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class AAudioMixer {
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public:
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AAudioMixer() {}
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void allocate(int32_t samplesPerFrame, int32_t framesPerBurst);
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void clear();
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/**
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* Mix from this FIFO
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* @param streamIndex for marking stream variables in systrace
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* @param fifo to read from
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* @param allowUnderflow if true then allow mixer to advance read index past the write index
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* @return frames read from this stream
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*/
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int32_t mix(int streamIndex, std::shared_ptr<android::FifoBuffer> fifo, bool allowUnderflow);
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float *getOutputBuffer();
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int32_t getFramesPerBurst() const { return mFramesPerBurst; }
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private:
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void mixPart(float *destination, float *source, int32_t numFrames);
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std::unique_ptr<float[]> mOutputBuffer;
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int32_t mSamplesPerFrame = 0;
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int32_t mFramesPerBurst = 0;
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int32_t mBufferSizeInBytes = 0;
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};
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#endif //AAUDIO_AAUDIO_MIXER_H
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