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