| /* |
| * 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 "android_media_Utils.h" |
| |
| #include "src/piex_types.h" |
| #include "src/piex.h" |
| |
| #include <jni.h> |
| #include <JNIHelp.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include <nativehelper/ScopedLocalRef.h> |
| |
| #include <utils/Log.h> |
| #include <utils/String8.h> |
| #include <utils/KeyedVector.h> |
| |
| // ---------------------------------------------------------------------------- |
| |
| using namespace android; |
| |
| #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 */, jobject jfileDescriptor) { |
| int fd = jniGetFDFromFileDescriptor(env, jfileDescriptor); |
| if (fd < 0) { |
| ALOGI("Invalid file descriptor"); |
| return NULL; |
| } |
| |
| piex::PreviewImageData image_data; |
| std::unique_ptr<FileStream> stream(new FileStream(fd)); |
| |
| if (!GetExifFromRawImage(stream.get(), String8("[file descriptor]"), image_data)) { |
| ALOGI("Raw image not detected"); |
| 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( |
| "%02u:%02u:%02u", |
| 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/io/FileDescriptor;)Ljava/util/HashMap;", |
| (void*)ExifInterface_getRawMetadata }, |
| }; |
| |
| int register_android_media_ExifInterface(JNIEnv *env) { |
| return AndroidRuntime::registerNativeMethods( |
| env, |
| "android/media/ExifInterface", |
| gMethods, |
| NELEM(gMethods)); |
| } |