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 <media/NdkImage.h> 21 #include <media/NdkImageReader.h> 22 23 // --------------------------------------------------------------------------- 24 namespace android { 25 namespace renderscript { 26 27 class Allocation; 28 class Context; 29 30 /** 31 * CpuConsumer is a BufferQueue consumer endpoint that allows direct CPU 32 * access to the underlying gralloc buffers provided by BufferQueue. Multiple 33 * buffers may be acquired by it at once, to be used concurrently by the 34 * CpuConsumer owner. Sets gralloc usage flags to be software-read-only. 35 * This queue is synchronous by default. 36 */ 37 class GrallocConsumer 38 { 39 public: 40 GrallocConsumer(const Context *, Allocation *, uint32_t numAlloc); 41 42 virtual ~GrallocConsumer(); 43 ANativeWindow* getNativeWindow(); 44 media_status_t lockNextBuffer(uint32_t idx = 0); 45 media_status_t unlockBuffer(uint32_t idx = 0); 46 uint32_t getNextAvailableIdx(Allocation *a); 47 bool releaseIdx(uint32_t idx); 48 bool isActive(); 49 uint32_t mNumAlloc; 50 51 static void onFrameAvailable(void* obj, AImageReader* reader); 52 53 private: 54 media_status_t releaseAcquiredBufferLocked(uint32_t idx); 55 // Boolean array to check if a position has been occupied or not. 56 bool *isIdxUsed; 57 Allocation **mAlloc; 58 59 const Context *mCtx; 60 AImageReader* mImgReader; 61 ANativeWindow* mNativeWindow; 62 AImageReader_ImageListener mReaderCb; 63 // Tracking for buffers acquired by the user 64 struct AcquiredBuffer { 65 AImage *mImg; 66 uint8_t *mBufferPointer; 67 AcquiredBufferAcquiredBuffer68 AcquiredBuffer() : 69 mImg(nullptr), 70 mBufferPointer(nullptr) { 71 } 72 }; 73 AcquiredBuffer *mAcquiredBuffer; 74 }; 75 76 } // namespace renderscript 77 } // namespace android 78 79 #endif // ANDROID_RS_GRALLOC_CONSUMER_H 80