61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
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// Copyright (C) 2021 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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#pragma once
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#include "BusOutputStream.h"
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#include <time.h>
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namespace audio_proxy::service {
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// Impl of BusOutputStream which has a small buffer and consumes the audio data
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// in real time.
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class DummyBusOutputStream : public BusOutputStream {
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public:
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DummyBusOutputStream(const std::string& address,
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const AidlAudioConfig& config, int32_t flags);
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~DummyBusOutputStream() override;
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bool standby() override;
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bool pause() override;
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bool resume() override;
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bool drain(AidlAudioDrain drain) override;
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bool flush() override;
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bool close() override;
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bool setVolume(float left, float right) override;
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size_t availableToWrite() override;
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AidlWriteStatus writeRingBuffer(const uint8_t* firstMem, size_t firstLength,
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const uint8_t* secondMem,
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size_t secondLength) override;
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protected:
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bool prepareForWritingImpl(uint32_t frameSize, uint32_t frameCount) override;
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private:
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// Buffer capacity.
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int64_t mMaxBufferUs = 0;
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// Timestamp for the first played frame. Underrun will reset it.
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timespec mStartTime = {0, 0};
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// Total written buffer size in us after `mStartTime` reset.
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int64_t mInputUsSinceStart = 0;
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// Total played buffer size in us before underrun.
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int64_t mPlayedUsBeforeUnderrun = 0;
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};
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} // namespace audio_proxy::service
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