| /* |
| * Copyright 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| //#define LOG_NDEBUG 0 |
| #define LOG_TAG "ExifInterface_JNI" |
| #include <utils/Log.h> |
| #include <utils/String8.h> |
| #include <utils/KeyedVector.h> |
| |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include <jni.h> |
| #include <JNIHelp.h> |
| |
| #include <nativehelper/ScopedLocalRef.h> |
| |
| #include "src/piex_types.h" |
| #include "src/piex.h" |
| |
| // ---------------------------------------------------------------------------- |
| |
| using namespace android; |
| |
| class FileStream : public piex::StreamInterface { |
| private: |
| FILE *mFile; |
| size_t mPosition; |
| size_t mSize; |
| |
| public: |
| FileStream(const String8 filename) |
| : mPosition(0), |
| mSize(0) { |
| mFile = fopen(filename.string(), "r"); |
| if (mFile == NULL) { |
| return; |
| } |
| // Get the size. |
| fseek(mFile, 0l, SEEK_END); |
| mSize = ftell(mFile); |
| fseek(mFile, 0l, SEEK_SET); |
| } |
| |
| ~FileStream() { |
| if (mFile != NULL) { |
| fclose(mFile); |
| mFile = NULL; |
| } |
| } |
| |
| // Reads 'length' amount of bytes from 'offset' to 'data'. The 'data' buffer |
| // provided by the caller, guaranteed to be at least "length" bytes long. |
| // On 'kOk' the 'data' pointer contains 'length' valid bytes beginning at |
| // 'offset' bytes from the start of the stream. |
| // Returns 'kFail' if 'offset' + 'length' exceeds the stream and does not |
| // change the contents of 'data'. |
| piex::Error GetData( |
| const size_t offset, const size_t length, std::uint8_t* data) |
| override { |
| if (mFile == NULL) { |
| return piex::Error::kFail; |
| } |
| |
| // Seek first. |
| if (mPosition != offset) { |
| fseek(mFile, offset, SEEK_SET); |
| } |
| |
| // Read bytes. |
| size_t size = fread((void*)data, sizeof(std::uint8_t), length, mFile); |
| mPosition += size; |
| |
| // Handle errors. |
| if (ferror(mFile)) { |
| return piex::Error::kFail; |
| } |
| if (size == 0 && feof(mFile)) { |
| return piex::Error::kFail; |
| } |
| return piex::Error::kOk; |
| } |
| |
| bool exists() { |
| return mFile != NULL; |
| } |
| |
| size_t size() { |
| return mSize; |
| } |
| }; |
| |
| #define FIND_CLASS(var, className) \ |
| var = env->FindClass(className); \ |
| LOG_FATAL_IF(! var, "Unable to find class " className); |
| |
| #define GET_METHOD_ID(var, clazz, fieldName, fieldDescriptor) \ |
| var = env->GetMethodID(clazz, fieldName, fieldDescriptor); \ |
| LOG_FATAL_IF(! var, "Unable to find method " fieldName); |
| |
| struct HashMapFields { |
| jmethodID init; |
| jmethodID put; |
| }; |
| |
| struct fields_t { |
| HashMapFields hashMap; |
| jclass hashMapClassId; |
| }; |
| |
| static fields_t gFields; |
| |
| static jobject KeyedVectorToHashMap(JNIEnv *env, KeyedVector<String8, String8> const &map) { |
| jclass clazz = gFields.hashMapClassId; |
| jobject hashMap = env->NewObject(clazz, gFields.hashMap.init); |
| for (size_t i = 0; i < map.size(); ++i) { |
| jstring jkey = env->NewStringUTF(map.keyAt(i).string()); |
| jstring jvalue = env->NewStringUTF(map.valueAt(i).string()); |
| env->CallObjectMethod(hashMap, gFields.hashMap.put, jkey, jvalue); |
| env->DeleteLocalRef(jkey); |
| env->DeleteLocalRef(jvalue); |
| } |
| return hashMap; |
| } |
| |
| extern "C" { |
| |
| // -------------------------- ExifInterface methods --------------------------- |
| |
| static void ExifInterface_initRaw(JNIEnv *env) { |
| jclass clazz; |
| FIND_CLASS(clazz, "java/util/HashMap"); |
| gFields.hashMapClassId = static_cast<jclass>(env->NewGlobalRef(clazz)); |
| |
| GET_METHOD_ID(gFields.hashMap.init, clazz, "<init>", "()V"); |
| GET_METHOD_ID(gFields.hashMap.put, clazz, "put", |
| "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"); |
| } |
| |
| static jobject ExifInterface_getRawMetadata( |
| JNIEnv* env, jclass /* clazz */, jstring jfilename) { |
| const char* filenameChars = env->GetStringUTFChars(jfilename, NULL); |
| if (filenameChars == NULL) { |
| return NULL; |
| } |
| String8 filename(filenameChars); |
| env->ReleaseStringUTFChars(jfilename, filenameChars); |
| |
| piex::PreviewImageData image_data; |
| memset(&image_data, 0, sizeof(image_data)); |
| std::unique_ptr<FileStream> stream(new FileStream(filename)); |
| |
| if (!stream.get()->exists()) { |
| // File is not exists. |
| ALOGI("File is not exists: %s", filename.string()); |
| return NULL; |
| } |
| |
| if (!piex::IsRaw(stream.get())) { |
| // Format not supported. |
| ALOGI("Format not supported: %s", filename.string()); |
| return NULL; |
| } |
| |
| piex::Error err = piex::GetPreviewImageData(stream.get(), &image_data); |
| if (err != piex::Error::kOk) { |
| // The input data seems to be broken. |
| ALOGI("Raw image not detected: %s (error code: %d)", filename.string(), (int32_t)err); |
| return NULL; |
| } |
| |
| if (image_data.thumbnail_offset + image_data.thumbnail_length > stream.get()->size()) { |
| // Corrupted file. |
| ALOGI("Corrupted file: %s", filename.string()); |
| return NULL; |
| } |
| |
| KeyedVector<String8, String8> map; |
| |
| if (image_data.thumbnail_length > 0) { |
| map.add(String8("hasThumbnail"), String8("true")); |
| map.add(String8("thumbnailOffset"), String8::format("%d", image_data.thumbnail_offset)); |
| map.add(String8("thumbnailLength"), String8::format("%d", image_data.thumbnail_length)); |
| } else { |
| map.add(String8("hasThumbnail"), String8("false")); |
| } |
| |
| map.add( |
| String8("Orientation"), |
| String8::format("%u", image_data.exif_orientation)); |
| map.add( |
| String8("ImageWidth"), |
| String8::format("%u", image_data.full_width)); |
| map.add( |
| String8("ImageLength"), |
| String8::format("%u", image_data.full_height)); |
| |
| // Current PIEX does not have LightSource information while JPEG version of |
| // EXIFInterface always declares the light source field. For the |
| // compatibility, it provides the default value of the light source field. |
| map.add(String8("LightSource"), String8("0")); |
| |
| if (!image_data.maker.empty()) { |
| map.add(String8("Make"), String8(image_data.maker.c_str())); |
| } |
| |
| if (!image_data.model.empty()) { |
| map.add(String8("Model"), String8(image_data.model.c_str())); |
| } |
| |
| if (!image_data.date_time.empty()) { |
| map.add(String8("DateTime"), String8(image_data.date_time.c_str())); |
| } |
| |
| if (image_data.iso) { |
| map.add( |
| String8("ISOSpeedRatings"), |
| String8::format("%u", image_data.iso)); |
| } |
| |
| if (image_data.exposure_time.numerator != 0 |
| && image_data.exposure_time.denominator != 0) { |
| double exposureTime = |
| (double)image_data.exposure_time.numerator |
| / image_data.exposure_time.denominator; |
| |
| const char* format; |
| if (exposureTime < 0.01) { |
| format = "%6.4f"; |
| } else { |
| format = "%5.3f"; |
| } |
| map.add(String8("ExposureTime"), String8::format(format, exposureTime)); |
| } |
| |
| if (image_data.fnumber.numerator != 0 |
| && image_data.fnumber.denominator != 0) { |
| double fnumber = |
| (double)image_data.fnumber.numerator |
| / image_data.fnumber.denominator; |
| map.add(String8("FNumber"), String8::format("%5.3f", fnumber)); |
| } |
| |
| if (image_data.focal_length.numerator != 0 |
| && image_data.focal_length.denominator != 0) { |
| map.add( |
| String8("FocalLength"), |
| String8::format( |
| "%u/%u", |
| image_data.focal_length.numerator, |
| image_data.focal_length.denominator)); |
| } |
| |
| if (image_data.gps.is_valid) { |
| if (image_data.gps.latitude[0].denominator != 0 |
| && image_data.gps.latitude[1].denominator != 0 |
| && image_data.gps.latitude[2].denominator != 0) { |
| map.add( |
| String8("GPSLatitude"), |
| String8::format( |
| "%u/%u,%u/%u,%u/%u", |
| image_data.gps.latitude[0].numerator, |
| image_data.gps.latitude[0].denominator, |
| image_data.gps.latitude[1].numerator, |
| image_data.gps.latitude[1].denominator, |
| image_data.gps.latitude[2].numerator, |
| image_data.gps.latitude[2].denominator)); |
| } |
| |
| if (image_data.gps.latitude_ref) { |
| char str[2]; |
| str[0] = image_data.gps.latitude_ref; |
| str[1] = 0; |
| map.add(String8("GPSLatitudeRef"), String8(str)); |
| } |
| |
| if (image_data.gps.longitude[0].denominator != 0 |
| && image_data.gps.longitude[1].denominator != 0 |
| && image_data.gps.longitude[2].denominator != 0) { |
| map.add( |
| String8("GPSLongitude"), |
| String8::format( |
| "%u/%u,%u/%u,%u/%u", |
| image_data.gps.longitude[0].numerator, |
| image_data.gps.longitude[0].denominator, |
| image_data.gps.longitude[1].numerator, |
| image_data.gps.longitude[1].denominator, |
| image_data.gps.longitude[2].numerator, |
| image_data.gps.longitude[2].denominator)); |
| } |
| |
| if (image_data.gps.longitude_ref) { |
| char str[2]; |
| str[0] = image_data.gps.longitude_ref; |
| str[1] = 0; |
| map.add(String8("GPSLongitudeRef"), String8(str)); |
| } |
| |
| if (image_data.gps.altitude.denominator != 0) { |
| map.add( |
| String8("GPSAltitude"), |
| String8::format("%u/%u", |
| image_data.gps.altitude.numerator, |
| image_data.gps.altitude.denominator)); |
| |
| map.add( |
| String8("GPSAltitudeRef"), |
| String8(image_data.gps.altitude_ref ? "1" : "0")); |
| } |
| |
| if (image_data.gps.time_stamp[0].denominator != 0 |
| && image_data.gps.time_stamp[1].denominator != 0 |
| && image_data.gps.time_stamp[2].denominator != 0) { |
| map.add( |
| String8("GPSTimeStamp"), |
| String8::format( |
| "%2u:%2u:%2u", |
| image_data.gps.time_stamp[0].numerator |
| / image_data.gps.time_stamp[0].denominator, |
| image_data.gps.time_stamp[1].numerator |
| / image_data.gps.time_stamp[1].denominator, |
| image_data.gps.time_stamp[2].numerator |
| / image_data.gps.time_stamp[2].denominator)); |
| } |
| |
| if (!image_data.gps.date_stamp.empty()) { |
| map.add( |
| String8("GPSDateStamp"), |
| String8(image_data.gps.date_stamp.c_str())); |
| } |
| } |
| |
| return KeyedVectorToHashMap(env, map); |
| } |
| |
| } // extern "C" |
| |
| // ---------------------------------------------------------------------------- |
| |
| static JNINativeMethod gMethods[] = { |
| { "initRawNative", "()V", (void *)ExifInterface_initRaw }, |
| { "getRawAttributesNative", "(Ljava/lang/String;)Ljava/util/HashMap;", |
| (void*)ExifInterface_getRawMetadata }, |
| }; |
| |
| int register_android_media_ExifInterface(JNIEnv *env) { |
| return AndroidRuntime::registerNativeMethods( |
| env, |
| "android/media/ExifInterface", |
| gMethods, |
| NELEM(gMethods)); |
| } |