122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
/*
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* Copyright 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_AAUDIO_H_
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#define OBOE_STREAM_AAUDIO_H_
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#include <atomic>
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#include <mutex>
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#include <thread>
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#include "oboe/AudioStreamBuilder.h"
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#include "oboe/AudioStream.h"
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#include "oboe/Definitions.h"
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#include "AAudioLoader.h"
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namespace oboe {
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/**
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* Implementation of OboeStream that uses AAudio.
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*
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* Do not create this class directly.
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* Use an OboeStreamBuilder to create one.
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*/
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class AudioStreamAAudio : public AudioStream {
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public:
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AudioStreamAAudio();
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explicit AudioStreamAAudio(const AudioStreamBuilder &builder);
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virtual ~AudioStreamAAudio() = default;
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/**
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*
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* @return true if AAudio is supported on this device.
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*/
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static bool isSupported();
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// These functions override methods in AudioStream.
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// See AudioStream for documentation.
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Result open() override;
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Result close() override;
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Result requestStart() override;
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Result requestPause() override;
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Result requestFlush() override;
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Result requestStop() override;
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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 getBufferSizeInFrames() override;
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int32_t getFramesPerBurst() override;
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ResultWithValue<int32_t> getXRunCount() const override;
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bool isXRunCountSupported() const override { return true; }
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ResultWithValue<double> calculateLatencyMillis() override;
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Result waitForStateChange(StreamState currentState,
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StreamState *nextState,
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int64_t timeoutNanoseconds) override;
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Result getTimestamp(clockid_t clockId,
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int64_t *framePosition,
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int64_t *timeNanoseconds) override;
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ResultWithValue<FrameTimestamp> getTimestamp(clockid_t clockId) override;
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StreamState getState() override;
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AudioApi getAudioApi() const override {
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return AudioApi::AAudio;
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}
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DataCallbackResult callOnAudioReady(AAudioStream *stream,
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void *audioData,
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int32_t numFrames);
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void onErrorInThread(AAudioStream *stream, Result error);
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void *getUnderlyingStream() const override {
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return mAAudioStream.load();
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}
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protected:
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void updateFramesRead() override;
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void updateFramesWritten() override;
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private:
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bool isMMapUsed();
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std::atomic<bool> mCallbackThreadEnabled;
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// pointer to the underlying AAudio stream, valid if open, null if closed
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std::atomic<AAudioStream *> mAAudioStream{nullptr};
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static AAudioLoader *mLibLoader;
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};
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} // namespace oboe
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#endif // OBOE_STREAM_AAUDIO_H_
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