115 lines
3.0 KiB
Kotlin
115 lines
3.0 KiB
Kotlin
/*
|
|
* Copyright (C) 2012 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.
|
|
*/
|
|
|
|
package it.sephiroth.android.library.exif2
|
|
|
|
import android.util.Log
|
|
|
|
import java.io.IOException
|
|
import java.io.InputStream
|
|
|
|
/**
|
|
* This class reads the EXIF header of a JPEG file and stores it in
|
|
* [ExifData].
|
|
*/
|
|
internal class ExifReader(private val mInterface : ExifInterface) {
|
|
|
|
/**
|
|
* Parses the inputStream and and returns the EXIF data in an
|
|
* [ExifData].
|
|
*
|
|
* @throws ExifInvalidFormatException
|
|
* @throws java.io.IOException
|
|
*/
|
|
@Throws(ExifInvalidFormatException::class, IOException::class)
|
|
fun read(inputStream : InputStream, options : Int) : ExifData {
|
|
val parser = ExifParser.parse(inputStream, options, mInterface)
|
|
val exifData = ExifData(
|
|
byteOrder = parser.byteOrder,
|
|
sections = parser.sections,
|
|
mUncompressedDataPosition = parser.uncompressedDataPosition,
|
|
qualityGuess = parser.qualityGuess,
|
|
jpegProcess = parser.jpegProcess
|
|
)
|
|
|
|
val w = parser.imageWidth
|
|
val h = parser.imageLength
|
|
|
|
if(w > 0 && h > 0) {
|
|
exifData.setImageSize(w, h)
|
|
}
|
|
|
|
var event = parser.next()
|
|
while(event != ExifParser.EVENT_END) {
|
|
when(event) {
|
|
|
|
ExifParser.EVENT_START_OF_IFD ->
|
|
exifData.addIfdData(IfdData(parser.currentIfd))
|
|
|
|
ExifParser.EVENT_NEW_TAG -> {
|
|
val tag = parser.tag
|
|
when {
|
|
tag == null ->
|
|
Log.w(TAG, "parser.tag is null")
|
|
|
|
! tag.hasValue ->
|
|
parser.registerForTagValue(tag)
|
|
|
|
! parser.isDefinedTag(tag.ifd, tag.tagId) ->
|
|
Log.w(TAG, "skip tag because not registered in the tag table:$tag")
|
|
|
|
else ->
|
|
exifData.getIfdData(tag.ifd)?.setTag(tag)
|
|
}
|
|
|
|
}
|
|
|
|
ExifParser.EVENT_VALUE_OF_REGISTERED_TAG -> {
|
|
val tag = parser.tag !!
|
|
if(tag.dataType == ExifTag.TYPE_UNDEFINED) {
|
|
parser.readFullTagValue(tag)
|
|
}
|
|
exifData.getIfdData(tag.ifd) !!.setTag(tag)
|
|
}
|
|
|
|
ExifParser.EVENT_COMPRESSED_IMAGE -> {
|
|
val buf = ByteArray(parser.compressedImageSize)
|
|
if(buf.size == parser.read(buf)) {
|
|
exifData.compressedThumbnail = buf
|
|
} else {
|
|
Log.w(TAG, "Failed to read the compressed thumbnail")
|
|
}
|
|
}
|
|
|
|
ExifParser.EVENT_UNCOMPRESSED_STRIP -> {
|
|
val buf = ByteArray(parser.stripSize)
|
|
if(buf.size == parser.read(buf)) {
|
|
exifData.setStripBytes(parser.stripIndex, buf)
|
|
} else {
|
|
Log.w(TAG, "Failed to read the strip bytes")
|
|
}
|
|
}
|
|
}
|
|
event = parser.next()
|
|
}
|
|
return exifData
|
|
}
|
|
|
|
companion object {
|
|
private const val TAG = "ExifReader"
|
|
}
|
|
}
|