1 /* 2 * Copyright (C) 2021 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_LIBAUDIOPROCESSING_FUZZ_UTILS_H 18 #define ANDROID_LIBAUDIOPROCESSING_FUZZ_UTILS_H 19 20 #include <media/AudioBufferProvider.h> 21 #include <system/audio.h> 22 23 namespace android { 24 25 class Provider : public AudioBufferProvider { 26 const void* mAddr; // base address 27 const size_t mNumFrames; // total frames 28 const size_t mFrameSize; // size of each frame in bytes 29 size_t mNextFrame; // index of next frame to provide 30 size_t mUnrel; // number of frames not yet released 31 public: Provider(const void * addr,size_t frames,size_t frameSize)32 Provider(const void* addr, size_t frames, size_t frameSize) 33 : mAddr(addr), 34 mNumFrames(frames), 35 mFrameSize(frameSize), 36 mNextFrame(0), 37 mUnrel(0) {} getNextBuffer(Buffer * buffer)38 status_t getNextBuffer(Buffer* buffer) override { 39 if (buffer->frameCount > mNumFrames - mNextFrame) { 40 buffer->frameCount = mNumFrames - mNextFrame; 41 } 42 mUnrel = buffer->frameCount; 43 if (buffer->frameCount > 0) { 44 buffer->raw = (char*)mAddr + mFrameSize * mNextFrame; 45 return NO_ERROR; 46 } else { 47 buffer->raw = nullptr; 48 return NOT_ENOUGH_DATA; 49 } 50 } releaseBuffer(Buffer * buffer)51 void releaseBuffer(Buffer* buffer) override { 52 if (buffer->frameCount > mUnrel) { 53 mNextFrame += mUnrel; 54 mUnrel = 0; 55 } else { 56 mNextFrame += buffer->frameCount; 57 mUnrel -= buffer->frameCount; 58 } 59 buffer->frameCount = 0; 60 buffer->raw = nullptr; 61 } reset()62 void reset() { mNextFrame = 0; } 63 }; 64 65 } // namespace android 66 67 #endif // ANDROID_LIBAUDIOPROCESSING_FUZZ_UTILS_H 68