1 /* 2 * Copyright 2011, 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_MEDIA_UTILS_H_ 18 #define _ANDROID_MEDIA_UTILS_H_ 19 20 #include "src/piex_types.h" 21 #include "src/piex.h" 22 23 #include <android_runtime/AndroidRuntime.h> 24 #include <camera3.h> 25 #include <gui/CpuConsumer.h> 26 #include <jni.h> 27 #include <JNIHelp.h> 28 #include <utils/KeyedVector.h> 29 #include <utils/String8.h> 30 #include <SkStream.h> 31 32 namespace android { 33 34 class AssetStream : public piex::StreamInterface { 35 private: 36 SkStream *mStream; 37 size_t mPosition; 38 39 public: 40 AssetStream(SkStream* stream); 41 ~AssetStream(); 42 43 // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer 44 // provided by the caller, guaranteed to be at least "length" bytes long. 45 // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at 46 // 'offset' bytes from the start of the stream. 47 // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not 48 // change the contents of 'data'. 49 piex::Error GetData( 50 const size_t offset, const size_t length, std::uint8_t* data) override; 51 }; 52 53 class BufferedStream : public piex::StreamInterface { 54 private: 55 SkStream *mStream; 56 // Growable memory stream 57 SkDynamicMemoryWStream mStreamBuffer; 58 59 // Minimum size to read on filling the buffer. 60 const size_t kMinSizeToRead = 8192; 61 62 public: 63 BufferedStream(SkStream* stream); 64 ~BufferedStream(); 65 66 // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer 67 // provided by the caller, guaranteed to be at least "length" bytes long. 68 // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at 69 // 'offset' bytes from the start of the stream. 70 // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not 71 // change the contents of 'data'. 72 piex::Error GetData( 73 const size_t offset, const size_t length, std::uint8_t* data) override; 74 }; 75 76 class FileStream : public piex::StreamInterface { 77 private: 78 FILE *mFile; 79 size_t mPosition; 80 81 public: 82 FileStream(const int fd); 83 FileStream(const String8 filename); 84 ~FileStream(); 85 86 // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer 87 // provided by the caller, guaranteed to be at least "length" bytes long. 88 // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at 89 // 'offset' bytes from the start of the stream. 90 // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not 91 // change the contents of 'data'. 92 piex::Error GetData( 93 const size_t offset, const size_t length, std::uint8_t* data) override; 94 bool exists() const; 95 }; 96 97 // Reads EXIF metadata from a given raw image via piex. 98 // And returns true if the operation is successful; otherwise, false. 99 bool GetExifFromRawImage( 100 piex::StreamInterface* stream, const String8& filename, piex::PreviewImageData& image_data); 101 102 // Returns true if the conversion is successful; otherwise, false. 103 bool ConvertKeyValueArraysToKeyedVector( 104 JNIEnv *env, jobjectArray keys, jobjectArray values, 105 KeyedVector<String8, String8>* vector); 106 107 struct AMessage; 108 status_t ConvertMessageToMap( 109 JNIEnv *env, const sp<AMessage> &msg, jobject *map); 110 111 status_t ConvertKeyValueArraysToMessage( 112 JNIEnv *env, jobjectArray keys, jobjectArray values, 113 sp<AMessage> *msg); 114 115 // -----------Utility functions used by ImageReader/Writer JNI----------------- 116 117 typedef CpuConsumer::LockedBuffer LockedImage; 118 119 bool usingRGBAToJpegOverride(int32_t imageFormat, int32_t containerFormat); 120 121 int32_t applyFormatOverrides(int32_t imageFormat, int32_t containerFormat); 122 123 uint32_t Image_getJpegSize(LockedImage* buffer, bool usingRGBAOverride); 124 125 bool isFormatOpaque(int format); 126 127 bool isPossiblyYUV(PixelFormat format); 128 129 status_t getLockedImageInfo(LockedImage* buffer, int idx, int32_t containerFormat, 130 uint8_t **base, uint32_t *size, int *pixelStride, int *rowStride); 131 132 status_t lockImageFromBuffer(sp<GraphicBuffer> buffer, uint32_t inUsage, 133 const Rect& rect, int fenceFd, LockedImage* outputImage); 134 135 status_t lockImageFromBuffer(BufferItem* bufferItem, uint32_t inUsage, 136 int fenceFd, LockedImage* outputImage); 137 138 int getBufferWidth(BufferItem *buffer); 139 140 int getBufferHeight(BufferItem *buffer); 141 142 }; // namespace android 143 144 #endif // _ANDROID_MEDIA_UTILS_H_ 145
