| /* |
| * 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_OUT_SINK_H |
| #define ANDROID_AUDIO_STREAM_OUT_SINK_H |
| |
| #include <hardware/audio.h> |
| #include "NBAIO.h" |
| |
| namespace android { |
| |
| // not multi-thread safe |
| class AudioStreamOutSink : public NBAIO_Sink { |
| |
| public: |
| AudioStreamOutSink(audio_stream_out *stream); |
| virtual ~AudioStreamOutSink(); |
| |
| // NBAIO_Port interface |
| |
| virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers, |
| NBAIO_Format counterOffers[], size_t& numCounterOffers); |
| //virtual NBAIO_Format format(); |
| |
| // NBAIO_Sink interface |
| |
| //virtual size_t framesWritten() const; |
| //virtual size_t framesUnderrun() const; |
| //virtual size_t underruns() const; |
| |
| // This is an over-estimate, and could dupe the caller into making a blocking write() |
| // FIXME Use an audio HAL API to query the buffer emptying status when it's available. |
| virtual ssize_t availableToWrite() const { return mStreamBufferSizeBytes / mFrameSize; } |
| |
| virtual ssize_t write(const void *buffer, size_t count); |
| |
| virtual status_t getTimestamp(ExtendedTimestamp ×tamp); |
| |
| // NBAIO_Sink end |
| |
| #if 0 // until necessary |
| audio_stream_out *stream() const { return mStream; } |
| #endif |
| |
| private: |
| audio_stream_out * const mStream; |
| size_t mStreamBufferSizeBytes; // as reported by get_buffer_size() |
| }; |
| |
| } // namespace android |
| |
| #endif // ANDROID_AUDIO_STREAM_OUT_SINK_H |