1 /* 2 * Copyright (C) 2013 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_RS_GRALLOC_CONSUMER_H 18 #define ANDROID_RS_GRALLOC_CONSUMER_H 19 20 #include <gui/ConsumerBase.h> 21 22 #include <ui/GraphicBuffer.h> 23 24 #include <utils/String8.h> 25 #include <utils/Vector.h> 26 #include <utils/threads.h> 27 28 29 // --------------------------------------------------------------------------- 30 namespace android { 31 namespace renderscript { 32 33 class Allocation; 34 35 /** 36 * CpuConsumer is a BufferQueue consumer endpoint that allows direct CPU 37 * access to the underlying gralloc buffers provided by BufferQueue. Multiple 38 * buffers may be acquired by it at once, to be used concurrently by the 39 * CpuConsumer owner. Sets gralloc usage flags to be software-read-only. 40 * This queue is synchronous by default. 41 */ 42 class GrallocConsumer : public ConsumerBase 43 { 44 public: 45 typedef ConsumerBase::FrameAvailableListener FrameAvailableListener; 46 47 GrallocConsumer(Allocation *, const sp<IGraphicBufferConsumer>& bq, int flags); 48 49 virtual ~GrallocConsumer(); 50 status_t lockNextBuffer(); 51 status_t unlockBuffer(); 52 53 private: 54 status_t releaseAcquiredBufferLocked(); 55 Allocation *mAlloc; 56 57 // Tracking for buffers acquired by the user 58 struct AcquiredBuffer { 59 // Need to track the original mSlot index and the buffer itself because 60 // the mSlot entry may be freed/reused before the acquired buffer is 61 // released. 62 int mSlot; 63 sp<GraphicBuffer> mGraphicBuffer; 64 void *mBufferPointer; 65 AcquiredBufferAcquiredBuffer66 AcquiredBuffer() : 67 mSlot(BufferQueue::INVALID_BUFFER_SLOT), 68 mBufferPointer(nullptr) { 69 } 70 }; 71 AcquiredBuffer mAcquiredBuffer; 72 }; 73 74 } // namespace renderscript 75 } // namespace android 76 77 #endif // ANDROID_RS_GRALLOC_CONSUMER_H 78 79