services/audioflinger/MonoPipeReader.h

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_AUDIO_MONO_PIPE_READER_H
#define ANDROID_AUDIO_MONO_PIPE_READER_H

#include "MonoPipe.h"

namespace android {

// MonoPipeReader is safe for only a single reader thread
class MonoPipeReader : public NBAIO_Source {

public:

    // Construct a MonoPipeReader and associate it with a MonoPipe;
    // any data already in the pipe is visible to this PipeReader.
    // There can be only a single MonoPipeReader per MonoPipe.
    // FIXME make this constructor a factory method of MonoPipe.
    MonoPipeReader(MonoPipe* pipe);
    virtual ~MonoPipeReader();

    // NBAIO_Port interface

    //virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers,
    //                          NBAIO_Format counterOffers[], size_t& numCounterOffers);
    //virtual NBAIO_Format format() const;

    // NBAIO_Source interface

    //virtual size_t framesRead() const;
    //virtual size_t framesOverrun();
    //virtual size_t overruns();

    virtual ssize_t availableToRead();

    virtual ssize_t read(void *buffer, size_t count);

    // NBAIO_Source end

#if 0   // until necessary
    MonoPipe* pipe() const { return mPipe; }
#endif

private:
    MonoPipe * const mPipe;
};

}   // namespace android

#endif  // ANDROID_AUDIO_MONO_PIPE_READER_H