Jooyung Han | cb1e896 | 2019-02-21 14:18:11 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019, 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_STREAMS_H_ |
| 18 | #define _ANDROID_MEDIA_STREAMS_H_ |
| 19 | |
| 20 | #include "src/piex_types.h" |
| 21 | #include "src/piex.h" |
| 22 | |
| 23 | #include <jni.h> |
| 24 | #include <nativehelper/JNIHelp.h> |
| 25 | #include <utils/KeyedVector.h> |
| 26 | #include <utils/String8.h> |
| 27 | #include <utils/StrongPointer.h> |
| 28 | #include <SkStream.h> |
| 29 | |
| 30 | |
| 31 | namespace android { |
| 32 | |
| 33 | class AssetStream : public piex::StreamInterface { |
| 34 | private: |
| 35 | SkStream *mStream; |
| 36 | size_t mPosition; |
| 37 | |
| 38 | public: |
| 39 | explicit AssetStream(SkStream* stream); |
| 40 | ~AssetStream(); |
| 41 | |
| 42 | // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer |
| 43 | // provided by the caller, guaranteed to be at least "length" bytes long. |
| 44 | // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at |
| 45 | // 'offset' bytes from the start of the stream. |
| 46 | // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not |
| 47 | // change the contents of 'data'. |
| 48 | piex::Error GetData( |
| 49 | const size_t offset, const size_t length, std::uint8_t* data) override; |
| 50 | }; |
| 51 | |
| 52 | class BufferedStream : public piex::StreamInterface { |
| 53 | private: |
| 54 | SkStream *mStream; |
| 55 | // Growable memory stream |
| 56 | SkDynamicMemoryWStream mStreamBuffer; |
| 57 | |
| 58 | // Minimum size to read on filling the buffer. |
| 59 | const size_t kMinSizeToRead = 8192; |
| 60 | |
| 61 | public: |
| 62 | explicit BufferedStream(SkStream* stream); |
| 63 | ~BufferedStream(); |
| 64 | |
| 65 | // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer |
| 66 | // provided by the caller, guaranteed to be at least "length" bytes long. |
| 67 | // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at |
| 68 | // 'offset' bytes from the start of the stream. |
| 69 | // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not |
| 70 | // change the contents of 'data'. |
| 71 | piex::Error GetData( |
| 72 | const size_t offset, const size_t length, std::uint8_t* data) override; |
| 73 | }; |
| 74 | |
| 75 | class FileStream : public piex::StreamInterface { |
| 76 | private: |
| 77 | FILE *mFile; |
| 78 | size_t mPosition; |
| 79 | |
| 80 | public: |
| 81 | explicit FileStream(const int fd); |
| 82 | explicit FileStream(const String8 filename); |
| 83 | ~FileStream(); |
| 84 | |
| 85 | // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer |
| 86 | // provided by the caller, guaranteed to be at least "length" bytes long. |
| 87 | // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at |
| 88 | // 'offset' bytes from the start of the stream. |
| 89 | // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not |
| 90 | // change the contents of 'data'. |
| 91 | piex::Error GetData( |
| 92 | const size_t offset, const size_t length, std::uint8_t* data) override; |
| 93 | bool exists() const; |
| 94 | }; |
| 95 | |
| 96 | // Reads EXIF metadata from a given raw image via piex. |
| 97 | // And returns true if the operation is successful; otherwise, false. |
| 98 | bool GetExifFromRawImage( |
| 99 | piex::StreamInterface* stream, const String8& filename, piex::PreviewImageData& image_data); |
| 100 | |
| 101 | // Returns true if the conversion is successful; otherwise, false. |
| 102 | bool ConvertKeyValueArraysToKeyedVector( |
| 103 | JNIEnv *env, jobjectArray keys, jobjectArray values, |
| 104 | KeyedVector<String8, String8>* vector); |
| 105 | |
| 106 | struct AMessage; |
| 107 | status_t ConvertMessageToMap( |
| 108 | JNIEnv *env, const sp<AMessage> &msg, jobject *map); |
| 109 | |
| 110 | status_t ConvertKeyValueArraysToMessage( |
| 111 | JNIEnv *env, jobjectArray keys, jobjectArray values, |
| 112 | sp<AMessage> *msg); |
| 113 | |
| 114 | }; // namespace android |
| 115 | |
| 116 | #endif // _ANDROID_MEDIA_STREAMS_H_ |