1 // Copyright 2018 The Chromium Authors 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_ANDROID_ANDROID_IMAGE_READER_COMPAT_H_ 6 #define BASE_ANDROID_ANDROID_IMAGE_READER_COMPAT_H_ 7 8 #include "base/android/android_image_reader_abi.h" 9 #include "base/base_export.h" 10 #include "base/no_destructor.h" 11 12 namespace base { 13 namespace android { 14 15 // This class provides runtime support for working with AImage, AImageReader and 16 // ANativeWindow objects on Android O systems without requiring building for the 17 // Android O NDK level. Don't call GetInstance() unless IsSupported() returns 18 // true. 19 class BASE_EXPORT AndroidImageReader { 20 public: 21 // Thread safe GetInstance. 22 static AndroidImageReader& GetInstance(); 23 24 AndroidImageReader(const AndroidImageReader&) = delete; 25 AndroidImageReader& operator=(const AndroidImageReader&) = delete; 26 27 // Check if the image reader usage is supported. This function returns TRUE 28 // if android version is >=OREO, image reader support is not disabled and all 29 // the required functions are loaded. 30 bool IsSupported(); 31 32 // Naming convention of all the below functions are chosen to exactly match 33 // the function names in the NDK. 34 void AImage_delete(AImage* image); 35 void AImage_deleteAsync(AImage* image, int releaseFenceFd); 36 media_status_t AImage_getHardwareBuffer(const AImage* image, 37 AHardwareBuffer** buffer); 38 media_status_t AImage_getWidth(const AImage* image, int32_t* width); 39 media_status_t AImage_getHeight(const AImage* image, int32_t* height); 40 media_status_t AImage_getCropRect(const AImage* image, AImageCropRect* rect); 41 media_status_t AImageReader_newWithUsage(int32_t width, 42 int32_t height, 43 int32_t format, 44 uint64_t usage, 45 int32_t maxImages, 46 AImageReader** reader); 47 media_status_t AImageReader_setImageListener( 48 AImageReader* reader, 49 AImageReader_ImageListener* listener); 50 void AImageReader_delete(AImageReader* reader); 51 media_status_t AImageReader_getFormat(const AImageReader* reader, 52 int32_t* format); 53 media_status_t AImageReader_getWindow(AImageReader* reader, 54 ANativeWindow** window); 55 media_status_t AImageReader_acquireLatestImageAsync(AImageReader* reader, 56 AImage** image, 57 int* acquireFenceFd); 58 media_status_t AImageReader_acquireNextImageAsync(AImageReader* reader, 59 AImage** image, 60 int* acquireFenceFd); 61 jobject ANativeWindow_toSurface(JNIEnv* env, ANativeWindow* window); 62 63 private: 64 friend class base::NoDestructor<AndroidImageReader>; 65 66 AndroidImageReader(); 67 bool LoadFunctions(); 68 69 const bool is_supported_; 70 pAImage_delete AImage_delete_; 71 pAImage_deleteAsync AImage_deleteAsync_; 72 pAImage_getHardwareBuffer AImage_getHardwareBuffer_; 73 pAImage_getWidth AImage_getWidth_; 74 pAImage_getHeight AImage_getHeight_; 75 pAImage_getCropRect AImage_getCropRect_; 76 pAImageReader_newWithUsage AImageReader_newWithUsage_; 77 pAImageReader_setImageListener AImageReader_setImageListener_; 78 pAImageReader_delete AImageReader_delete_; 79 pAImageReader_getFormat AImageReader_getFormat_; 80 pAImageReader_getWindow AImageReader_getWindow_; 81 pAImageReader_acquireLatestImageAsync AImageReader_acquireLatestImageAsync_; 82 pAImageReader_acquireNextImageAsync AImageReader_acquireNextImageAsync_; 83 pANativeWindow_toSurface ANativeWindow_toSurface_; 84 }; 85 86 } // namespace android 87 } // namespace base 88 89 #endif // BASE_ANDROID_ANDROID_IMAGE_READER_COMPAT_H_ 90