RingBufferParcelable.h revision f53e613b3dedab3ecada2c93d8846233c442d129
1/* 2 * Copyright 2016 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 BINDING_RINGBUFFER_PARCELABLE_H 18#define BINDING_RINGBUFFER_PARCELABLE_H 19 20#include <stdint.h> 21 22#include <binder/Parcelable.h> 23 24#include "binding/AAudioServiceDefinitions.h" 25#include "binding/SharedRegionParcelable.h" 26 27namespace aaudio { 28 29class RingBufferParcelable : public Parcelable { 30public: 31 RingBufferParcelable(); 32 virtual ~RingBufferParcelable(); 33 34 // TODO This assumes that all three use the same SharedMemoryParcelable 35 void setupMemory(int32_t sharedMemoryIndex, 36 int32_t dataMemoryOffset, 37 int32_t dataSizeInBytes, 38 int32_t readCounterOffset, 39 int32_t writeCounterOffset, 40 int32_t counterSizeBytes); 41 42 void setupMemory(int32_t sharedMemoryIndex, 43 int32_t dataMemoryOffset, 44 int32_t dataSizeInBytes); 45 46 int32_t getBytesPerFrame(); 47 48 void setBytesPerFrame(int32_t bytesPerFrame); 49 50 int32_t getFramesPerBurst(); 51 52 void setFramesPerBurst(int32_t framesPerBurst); 53 54 int32_t getCapacityInFrames(); 55 56 void setCapacityInFrames(int32_t capacityInFrames); 57 58 /** 59 * The read and write must be symmetric. 60 */ 61 virtual status_t writeToParcel(Parcel* parcel) const override; 62 63 virtual status_t readFromParcel(const Parcel* parcel) override; 64 65 aaudio_result_t resolve(SharedMemoryParcelable *memoryParcels, RingBufferDescriptor *descriptor); 66 67 aaudio_result_t validate(); 68 69 void dump(); 70 71private: 72 SharedRegionParcelable mReadCounterParcelable; 73 SharedRegionParcelable mWriteCounterParcelable; 74 SharedRegionParcelable mDataParcelable; 75 int32_t mBytesPerFrame = 0; // index is in frames 76 int32_t mFramesPerBurst = 0; // for ISOCHRONOUS queues 77 int32_t mCapacityInFrames = 0; // zero if unused 78 RingbufferFlags mFlags = RingbufferFlags::NONE; 79}; 80 81} /* namespace aaudio */ 82 83#endif //BINDING_RINGBUFFER_PARCELABLE_H 84