PipeReader.h revision 010662326b9c43c703725f933e95e0897f8a6bdd
1010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten/* 2010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Copyright (C) 2012 The Android Open Source Project 3010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 4010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * you may not use this file except in compliance with the License. 6010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * You may obtain a copy of the License at 7010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 8010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * 10010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * Unless required by applicable law or agreed to in writing, software 11010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * See the License for the specific language governing permissions and 14010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten * limitations under the License. 15010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten */ 16010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 17010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#ifndef ANDROID_AUDIO_PIPE_READER_H 18010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#define ANDROID_AUDIO_PIPE_READER_H 19010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 20010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#include "Pipe.h" 21010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 22010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastennamespace android { 23010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 24010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten// PipeReader is safe for only a single thread 25010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastenclass PipeReader : public NBAIO_Source { 26010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 27010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastenpublic: 28010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 29010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // Construct a PipeReader and associate it with a Pipe 30010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // FIXME make this constructor a factory method of Pipe. 31010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten PipeReader(Pipe& pipe); 32010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten virtual ~PipeReader(); 33010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 34010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // NBAIO_Port interface 35010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 36010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten //virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers, 37010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // NBAIO_Format counterOffers[], size_t& numCounterOffers); 38010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten //virtual NBAIO_Format format() const; 39010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 40010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // NBAIO_Source interface 41010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 42010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten //virtual size_t framesRead() const; 43010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten virtual size_t framesOverrun() { return mFramesOverrun; } 44010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten virtual size_t overruns() { return mOverruns; } 45010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 46010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten virtual ssize_t availableToRead(); 47010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 48010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten virtual ssize_t read(void *buffer, size_t count); 49010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 50010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten // NBAIO_Source end 51010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 52010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#if 0 // until necessary 53010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten Pipe& pipe() const { return mPipe; } 54010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#endif 55010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 56010662326b9c43c703725f933e95e0897f8a6bddGlenn Kastenprivate: 57010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten Pipe& mPipe; 58010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten int32_t mFront; // follows behind mPipe.mRear 59010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten size_t mFramesOverrun; 60010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten size_t mOverruns; 61010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten}; 62010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 63010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten} // namespace android 64010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten 65010662326b9c43c703725f933e95e0897f8a6bddGlenn Kasten#endif // ANDROID_AUDIO_PIPE_READER_H 66