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98 lines
2.4 KiB
98 lines
2.4 KiB
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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#ifndef CTSAUDIO_AUDIOLOCAL_H
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#define CTSAUDIO_AUDIOLOCAL_H
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#include <utils/StrongPointer.h>
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#include <utils/threads.h>
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#include <Semaphore.h>
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#include "AudioHardware.h"
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class Buffer;
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/**
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* Basic API for playback and record
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*/
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class AudioLocal: public android::Thread, public AudioHardware {
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public:
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virtual bool prepare(AudioHardware::SamplingRate samplingRate, int gain,
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int mode = AudioHardware::EModeVoice);
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virtual bool startPlaybackOrRecord(android::sp<Buffer>& buffer, int numberRepetition = 1);
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virtual bool waitForCompletion();
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virtual void stopPlaybackOrRecord();
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virtual ~AudioLocal();
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protected:
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AudioLocal();
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virtual bool doPrepare(AudioHardware::SamplingRate, int samplesInOneGo) = 0;
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virtual bool doPlaybackOrRecord(android::sp<Buffer>& buffer) = 0;
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virtual void doStop() = 0;
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virtual void releaseHw() {};
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private:
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bool threadLoop();
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enum AudioCommand{
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ECmNone = 0,
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ECmInitialize,
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ECmRun,
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ECmStop,
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ECmThreadStop // terminate the thread
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};
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bool issueCommandAndWaitForCompletion(AudioCommand command);
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protected:
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private:
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// only one command at a time.
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// Thus, all parameters can be stored here.
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AudioHardware::SamplingRate mSamplingRate;
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android::sp<Buffer> mBuffer;
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int mNumberRepetition;
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int mCurrentRepeat;
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enum AudioState{
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EStNone,
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EStCreated,
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EStInitialized,
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EStRunning // playing or recording
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};
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volatile AudioState mState;
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volatile AudioCommand mCurrentCommand;
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static const int COMMAND_WAIT_TIME_MSEC = 4000;
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Semaphore mClientCommandWait;
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Semaphore mClientCompletionWait;
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Semaphore mAudioThreadWait;
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bool mCommandResult;
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bool mCompletionResult;
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};
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#endif // CTSAUDIO_AUDIOLOCAL_H
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