| /* |
| * 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 "android/graphics/CreateJavaOutputStreamAdaptor.h" |
| #include "src/piex_types.h" |
| #include "src/piex.h" |
| |
| #include <jni.h> |
| #include <JNIHelp.h> |
| #include <androidfw/Asset.h> |
| #include <android_runtime/AndroidRuntime.h> |
| #include <android/graphics/Utils.h> |
| #include <nativehelper/ScopedLocalRef.h> |
| |
| #include <utils/Log.h> |
| #include <utils/String8.h> |
| #include <utils/KeyedVector.h> |
| |
| // ---------------------------------------------------------------------------- |
| |
| using namespace android; |
| |
| static const char kJpegSignatureChars[] = {(char)0xff, (char)0xd8, (char)0xff}; |
| static const int kJpegSignatureSize = 3; |
| |
| #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 bool is_asset_stream(const SkStream& stream) { |
| return stream.hasLength() && stream.hasPosition(); |
| } |
| |
| static jobject ExifInterface_getThumbnailFromAsset( |
| JNIEnv* env, jclass /* clazz */, jlong jasset, jint jthumbnailOffset, |
| jint jthumbnailLength) { |
| Asset* asset = reinterpret_cast<Asset*>(jasset); |
| std::unique_ptr<AssetStreamAdaptor> stream(new AssetStreamAdaptor(asset)); |
| |
| std::unique_ptr<jbyte[]> thumbnailData(new jbyte[(int)jthumbnailLength]); |
| if (thumbnailData.get() == NULL) { |
| ALOGI("No memory to get thumbnail"); |
| return NULL; |
| } |
| |
| // Do not know the current offset. So rewind it. |
| stream->rewind(); |
| |
| // Read thumbnail. |
| stream->skip((int)jthumbnailOffset); |
| stream->read((void*)thumbnailData.get(), (int)jthumbnailLength); |
| |
| // Copy to the byte array. |
| jbyteArray byteArray = env->NewByteArray(jthumbnailLength); |
| env->SetByteArrayRegion(byteArray, 0, jthumbnailLength, thumbnailData.get()); |
| return byteArray; |
| } |
| |
| static jobject getRawAttributes(JNIEnv* env, SkStream* stream, bool returnThumbnail) { |
| std::unique_ptr<SkStream> streamDeleter(stream); |
| |
| std::unique_ptr<::piex::StreamInterface> piexStream; |
| if (is_asset_stream(*stream)) { |
| piexStream.reset(new AssetStream(streamDeleter.release())); |
| } else { |
| piexStream.reset(new BufferedStream(streamDeleter.release())); |
| } |
| |
| piex::PreviewImageData image_data; |
| |
| if (!GetExifFromRawImage(piexStream.get(), String8("[piex stream]"), image_data)) { |
| ALOGI("Raw image not detected"); |
| return NULL; |
| } |
| |
| KeyedVector<String8, String8> map; |
| |
| if (image_data.thumbnail.length > 0 |
| && image_data.thumbnail.format == ::piex::Image::kJpegCompressed) { |
| 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())); |
| } |
| } |
| |
| jobject hashMap = KeyedVectorToHashMap(env, map); |
| |
| if (returnThumbnail) { |
| std::unique_ptr<jbyte[]> thumbnailData(new jbyte[image_data.thumbnail.length]); |
| if (thumbnailData.get() == NULL) { |
| ALOGE("No memory to parse a thumbnail"); |
| return NULL; |
| } |
| jbyteArray jthumbnailByteArray = env->NewByteArray(image_data.thumbnail.length); |
| if (jthumbnailByteArray == NULL) { |
| ALOGE("No memory to parse a thumbnail"); |
| return NULL; |
| } |
| piexStream.get()->GetData(image_data.thumbnail.offset, image_data.thumbnail.length, |
| (uint8_t*)thumbnailData.get()); |
| env->SetByteArrayRegion( |
| jthumbnailByteArray, 0, image_data.thumbnail.length, thumbnailData.get()); |
| jstring jkey = env->NewStringUTF(String8("thumbnailData")); |
| env->CallObjectMethod(hashMap, gFields.hashMap.put, jkey, jthumbnailByteArray); |
| env->DeleteLocalRef(jkey); |
| env->DeleteLocalRef(jthumbnailByteArray); |
| } |
| return hashMap; |
| } |
| |
| static jobject ExifInterface_getRawAttributesFromAsset( |
| JNIEnv* env, jclass /* clazz */, jlong jasset) { |
| std::unique_ptr<char[]> jpegSignature(new char[kJpegSignatureSize]); |
| if (jpegSignature.get() == NULL) { |
| ALOGE("No enough memory to parse"); |
| return NULL; |
| } |
| |
| Asset* asset = reinterpret_cast<Asset*>(jasset); |
| std::unique_ptr<AssetStreamAdaptor> stream(new AssetStreamAdaptor(asset)); |
| |
| if (stream.get()->read(jpegSignature.get(), kJpegSignatureSize) != kJpegSignatureSize) { |
| // Rewind the stream. |
| stream.get()->rewind(); |
| |
| ALOGI("Corrupted image."); |
| return NULL; |
| } |
| |
| // Rewind the stream. |
| stream.get()->rewind(); |
| |
| if (memcmp(jpegSignature.get(), kJpegSignatureChars, kJpegSignatureSize) == 0) { |
| ALOGI("Should be a JPEG stream."); |
| return NULL; |
| } |
| |
| // Try to parse from the given stream. |
| jobject result = getRawAttributes(env, stream.get(), false); |
| |
| // Rewind the stream for the chance to read JPEG. |
| if (result == NULL) { |
| stream.get()->rewind(); |
| } |
| return result; |
| } |
| |
| static jobject ExifInterface_getRawAttributesFromFileDescriptor( |
| JNIEnv* env, jclass /* clazz */, jobject jfileDescriptor) { |
| std::unique_ptr<char[]> jpegSignature(new char[kJpegSignatureSize]); |
| if (jpegSignature.get() == NULL) { |
| ALOGE("No enough memory to parse"); |
| return NULL; |
| } |
| |
| int fd = jniGetFDFromFileDescriptor(env, jfileDescriptor); |
| if (fd < 0) { |
| ALOGI("Invalid file descriptor"); |
| return NULL; |
| } |
| |
| // Restore the file descriptor's offset on exiting this function. |
| AutoFDSeek autoRestore(fd); |
| |
| int dupFd = dup(fd); |
| |
| FILE* file = fdopen(dupFd, "r"); |
| if (file == NULL) { |
| ALOGI("Failed to open the file descriptor"); |
| return NULL; |
| } |
| |
| if (fgets(jpegSignature.get(), kJpegSignatureSize, file) == NULL) { |
| ALOGI("Corrupted image."); |
| return NULL; |
| } |
| |
| if (memcmp(jpegSignature.get(), kJpegSignatureChars, kJpegSignatureSize) == 0) { |
| ALOGI("Should be a JPEG stream."); |
| return NULL; |
| } |
| |
| // Rewind the file descriptor. |
| fseek(file, 0L, SEEK_SET); |
| |
| std::unique_ptr<SkFILEStream> fileStream(new SkFILEStream(file, |
| SkFILEStream::kCallerPasses_Ownership)); |
| return getRawAttributes(env, fileStream.get(), false); |
| } |
| |
| static jobject ExifInterface_getRawAttributesFromInputStream( |
| JNIEnv* env, jclass /* clazz */, jobject jinputStream) { |
| jbyteArray byteArray = env->NewByteArray(8*1024); |
| ScopedLocalRef<jbyteArray> scoper(env, byteArray); |
| std::unique_ptr<SkStream> stream(CreateJavaInputStreamAdaptor(env, jinputStream, scoper.get())); |
| return getRawAttributes(env, stream.get(), true); |
| } |
| |
| } // extern "C" |
| |
| // ---------------------------------------------------------------------------- |
| |
| static JNINativeMethod gMethods[] = { |
| { "nativeInitRaw", "()V", (void *)ExifInterface_initRaw }, |
| { "nativeGetThumbnailFromAsset", "(JII)[B", (void *)ExifInterface_getThumbnailFromAsset }, |
| { "nativeGetRawAttributesFromAsset", "(J)Ljava/util/HashMap;", |
| (void*)ExifInterface_getRawAttributesFromAsset }, |
| { "nativeGetRawAttributesFromFileDescriptor", "(Ljava/io/FileDescriptor;)Ljava/util/HashMap;", |
| (void*)ExifInterface_getRawAttributesFromFileDescriptor }, |
| { "nativeGetRawAttributesFromInputStream", "(Ljava/io/InputStream;)Ljava/util/HashMap;", |
| (void*)ExifInterface_getRawAttributesFromInputStream }, |
| }; |
| |
| int register_android_media_ExifInterface(JNIEnv *env) { |
| return AndroidRuntime::registerNativeMethods( |
| env, |
| "android/media/ExifInterface", |
| gMethods, |
| NELEM(gMethods)); |
| } |