1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_AUDIO_STREAM_IN_SOURCE_H 18 #define ANDROID_AUDIO_STREAM_IN_SOURCE_H 19 20 #include <media/nbaio/NBAIO.h> 21 22 namespace android { 23 24 class StreamInHalInterface; 25 26 // not multi-thread safe 27 class AudioStreamInSource : public NBAIO_Source { 28 29 public: 30 AudioStreamInSource(sp<StreamInHalInterface> stream); 31 virtual ~AudioStreamInSource(); 32 33 // NBAIO_Port interface 34 35 virtual ssize_t negotiate(const NBAIO_Format offers[], size_t numOffers, 36 NBAIO_Format counterOffers[], size_t& numCounterOffers); 37 //virtual NBAIO_Format format() const; 38 39 // NBAIO_Sink interface 40 41 //virtual size_t framesRead() const; 42 virtual int64_t framesOverrun(); 43 virtual int64_t overruns() { (void) framesOverrun(); return mOverruns; } 44 45 // This is an over-estimate, and could dupe the caller into making a blocking read() 46 // FIXME Use an audio HAL API to query the buffer filling status when it's available. 47 virtual ssize_t availableToRead() { return mStreamBufferSizeBytes / mFrameSize; } 48 49 virtual ssize_t read(void *buffer, size_t count); 50 51 // NBAIO_Sink end 52 53 #if 0 // until necessary 54 sp<StreamInHalInterface> stream() const { return mStream; } 55 #endif 56 57 private: 58 sp<StreamInHalInterface> mStream; 59 size_t mStreamBufferSizeBytes; // as reported by get_buffer_size() 60 int64_t mFramesOverrun; 61 int64_t mOverruns; 62 }; 63 64 } // namespace android 65 66 #endif // ANDROID_AUDIO_STREAM_IN_SOURCE_H 67
