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Diffstat (limited to 'include/media/nbaio/AudioStreamInSource.h')
-rw-r--r-- | include/media/nbaio/AudioStreamInSource.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/include/media/nbaio/AudioStreamInSource.h b/include/media/nbaio/AudioStreamInSource.h new file mode 100644 index 0000000..07d8c89 --- /dev/null +++ b/include/media/nbaio/AudioStreamInSource.h @@ -0,0 +1,65 @@ +/* + * 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 >> mBitShift; } + + virtual ssize_t read(void *buffer, size_t count); + + // 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 |