1 /* 2 * Copyright (C) 2020 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 STAGEFRIGHT_CODEC2_ALLOCATION_ION_H_ 18 #define STAGEFRIGHT_CODEC2_ALLOCATION_ION_H_ 19 20 #include <C2Buffer.h> 21 22 namespace android { 23 24 struct C2HandleIon : public C2Handle { 25 // ion handle owns ionFd(!) and bufferFd C2HandleIonC2HandleIon26 C2HandleIon(int bufferFd, size_t size) 27 : C2Handle(cHeader), 28 mFds{ bufferFd }, 29 mInts{ int(size & 0xFFFFFFFF), int((uint64_t(size) >> 32) & 0xFFFFFFFF), kMagic } { } 30 31 static bool isValid(const C2Handle * const o); 32 bufferFdC2HandleIon33 int bufferFd() const { return mFds.mBuffer; } sizeC2HandleIon34 size_t size() const { 35 return size_t(unsigned(mInts.mSizeLo)) 36 | size_t(uint64_t(unsigned(mInts.mSizeHi)) << 32); 37 } 38 39 protected: 40 struct { 41 int mBuffer; // shared ion buffer 42 } mFds; 43 struct { 44 int mSizeLo; // low 32-bits of size 45 int mSizeHi; // high 32-bits of size 46 int mMagic; 47 } mInts; 48 49 private: 50 typedef C2HandleIon _type; 51 enum { 52 kMagic = '\xc2io\x00', 53 numFds = sizeof(mFds) / sizeof(int), 54 numInts = sizeof(mInts) / sizeof(int), 55 version = sizeof(C2Handle) 56 }; 57 //constexpr static C2Handle cHeader = { version, numFds, numInts, {} }; 58 const static C2Handle cHeader; 59 }; 60 } // namespace android 61 62 #endif // STAGEFRIGHT_CODEC2_ALLOCATION_ION_H_ 63