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/*
* 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_STREAM_IN_SOURCE_H
#define ANDROID_AUDIO_STREAM_IN_SOURCE_H
#include <hardware/audio.h>
#include "NBAIO.h"
namespace android {
// not multi-thread safe
class AudioStreamInSource : public NBAIO_Source {
public:
AudioStreamInSource(audio_stream_in *stream);
virtual ~AudioStreamInSource();
// 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_Sink interface
//virtual size_t framesRead() const;
virtual size_t framesOverrun();
virtual size_t overruns() { (void) framesOverrun(); return mOverruns; }
// This is an over-estimate, and could dupe the caller into making a blocking read()
// FIXME Use an audio HAL API to query the buffer filling status when it's available.
virtual ssize_t availableToRead() { return mStreamBufferSizeBytes / mFrameSize; }
virtual ssize_t read(void *buffer, size_t count, int64_t readPTS);
// NBAIO_Sink end
#if 0 // until necessary
audio_stream_in *stream() const { return mStream; }
#endif
private:
audio_stream_in * const mStream;
size_t mStreamBufferSizeBytes; // as reported by get_buffer_size()
size_t mFramesOverrun;
size_t mOverruns;
};
} // namespace android
#endif // ANDROID_AUDIO_STREAM_IN_SOURCE_H
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