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authoralwin <alwin>2004-11-01 19:52:25 (UTC)
committer alwin <alwin>2004-11-01 19:52:25 (UTC)
commit2dc92f4bfe9e81edc2b0b24ecacf3bc44b344984 (patch) (side-by-side diff)
treeb1d5661ea64931b6eeb2030ceb22532cef699a75
parent5a41dcd5901badbd2e258b0a916fb012b6351eeb (diff)
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exif class added (taken from opie-eye_slave and more c++ like reworked)
it is used in oimageview while loading jpegs checking BEFORE loading if the image should be scaled loaded. ToDo: documentation of the interface, remove it from opie-eye_slave (it should use of course the library version)
Diffstat (more/less context) (show whitespace changes)
-rw-r--r--libopie2/opiemm/oimagescrollview.cpp6
-rw-r--r--libopie2/opiemm/opieexif.cpp1195
-rw-r--r--libopie2/opiemm/opieexif.h139
-rw-r--r--libopie2/opiemm/opiemm.pro4
4 files changed, 1342 insertions, 2 deletions
diff --git a/libopie2/opiemm/oimagescrollview.cpp b/libopie2/opiemm/oimagescrollview.cpp
index 56be10b..37a1ad5 100644
--- a/libopie2/opiemm/oimagescrollview.cpp
+++ b/libopie2/opiemm/oimagescrollview.cpp
@@ -4,6 +4,7 @@
#include <opie2/odebug.h>
#include <opie2/oapplication.h>
#include <opie2/owait.h>
+#include <opie2/opieexif.h>
#include <qimage.h>
#include <qlayout.h>
@@ -87,6 +88,8 @@ void OImageScrollView::loadJpeg(bool interncall)
bool real_load = false;
if (AutoScale()) {
if (!interncall) {
+ ExifData xf;
+ bool scanned = xf.scan(m_lastName);
int wid, hei;
wid = QApplication::desktop()->width();
hei = QApplication::desktop()->height();
@@ -95,10 +98,13 @@ void OImageScrollView::loadJpeg(bool interncall)
} else {
hei = wid;
}
+ if ( (scanned && (wid<xf.getWidth()||hei<xf.getHeight()))||!scanned ) {
param = QString( "Fast Shrink( 3 ) Scale( %1, %2, ScaleMin)" ).arg( wid ).arg( hei );
odebug << "Load jpeg scaled \"" << param << "\"" << oendl;
iio.setParameters(param.latin1());
setImageScaledLoaded(true);
+ }
+
real_load = true;
}
} else {
diff --git a/libopie2/opiemm/opieexif.cpp b/libopie2/opiemm/opieexif.cpp
new file mode 100644
index 0000000..0860ea8
--- a/dev/null
+++ b/libopie2/opiemm/opieexif.cpp
@@ -0,0 +1,1195 @@
+#include "opieexif.h"
+
+/* OPIE */
+#include <opie2/odebug.h>
+#include <qpe/timestring.h>
+/* QT */
+#include <qobject.h>
+#include <qimage.h>
+
+/**
+ exif.h
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <time.h>
+
+#include <qstring.h>
+#include <qfile.h>
+#include <qimage.h>
+
+//static int HaveAll;
+
+//--------------------------------------------------------------------------
+// Table of Jpeg encoding process names
+
+#define M_SOF0 0xC0 // Start Of Frame N
+#define M_SOF1 0xC1 // N indicates which compression process
+#define M_SOF2 0xC2 // Only SOF0-SOF2 are now in common use
+#define M_SOF3 0xC3
+#define M_SOF5 0xC5 // NB: codes C4 and CC are NOT SOF markers
+#define M_SOF6 0xC6
+#define M_SOF7 0xC7
+#define M_SOF9 0xC9
+#define M_SOF10 0xCA
+#define M_SOF11 0xCB
+#define M_SOF13 0xCD
+#define M_SOF14 0xCE
+#define M_SOF15 0xCF
+#define M_SOI 0xD8 // Start Of Image (beginning of datastream)
+#define M_EOI 0xD9 // End Of Image (end of datastream)
+#define M_SOS 0xDA // Start Of Scan (begins compressed data)
+#define M_JFIF 0xE0 // Jfif marker
+#define M_EXIF 0xE1 // Exif marker
+#define M_COM 0xFE // COMment
+
+
+//--------------------------------------------------------------------------
+// Describes format descriptor
+static int BytesPerFormat[] = {0,1,1,2,4,8,1,1,2,4,8,4,8};
+#define NUM_FORMATS 12
+
+#define FMT_BYTE 1
+#define FMT_STRING 2
+#define FMT_USHORT 3
+#define FMT_ULONG 4
+#define FMT_URATIONAL 5
+#define FMT_SBYTE 6
+#define FMT_UNDEFINED 7
+#define FMT_SSHORT 8
+#define FMT_SLONG 9
+#define FMT_SRATIONAL 10
+#define FMT_SINGLE 11
+#define FMT_DOUBLE 12
+
+//--------------------------------------------------------------------------
+// Describes tag values
+
+#define TAG_EXIF_OFFSET 0x8769
+#define TAG_INTEROP_OFFSET 0xa005
+
+#define TAG_MAKE 0x010F
+#define TAG_MODEL 0x0110
+#define TAG_ORIENTATION 0x0112
+
+#define TAG_EXPOSURETIME 0x829A
+#define TAG_FNUMBER 0x829D
+
+#define TAG_SHUTTERSPEED 0x9201
+#define TAG_APERTURE 0x9202
+#define TAG_MAXAPERTURE 0x9205
+#define TAG_FOCALLENGTH 0x920A
+
+#define TAG_DATETIME_ORIGINAL 0x9003
+#define TAG_USERCOMMENT 0x9286
+
+#define TAG_SUBJECT_DISTANCE 0x9206
+#define TAG_FLASH 0x9209
+
+#define TAG_FOCALPLANEXRES 0xa20E
+#define TAG_FOCALPLANEUNITS 0xa210
+#define TAG_EXIF_IMAGEWIDTH 0xA002
+#define TAG_EXIF_IMAGELENGTH 0xA003
+
+// the following is added 05-jan-2001 vcs
+#define TAG_EXPOSURE_BIAS 0x9204
+#define TAG_WHITEBALANCE 0x9208
+#define TAG_METERING_MODE 0x9207
+#define TAG_EXPOSURE_PROGRAM 0x8822
+#define TAG_ISO_EQUIVALENT 0x8827
+#define TAG_COMPRESSION_LEVEL 0x9102
+
+#define TAG_THUMBNAIL_OFFSET 0x0201
+#define TAG_THUMBNAIL_LENGTH 0x0202
+
+
+
+namespace Opie {
+
+namespace MM {
+
+class FatalError {
+ const char* ex;
+public:
+ FatalError(const char* s) { ex = s; }
+ void debug_print() const { owarn << "exception: " << ex << "" << oendl; }
+};
+
+ExifData::TagTable_t ProcessTable[] = {
+ { M_SOF0, "Baseline"},
+ { M_SOF1, "Extended sequential"},
+ { M_SOF2, "Progressive"},
+ { M_SOF3, "Lossless"},
+ { M_SOF5, "Differential sequential"},
+ { M_SOF6, "Differential progressive"},
+ { M_SOF7, "Differential lossless"},
+ { M_SOF9, "Extended sequential, arithmetic coding"},
+ { M_SOF10, "Progressive, arithmetic coding"},
+ { M_SOF11, "Lossless, arithmetic coding"},
+ { M_SOF13, "Differential sequential, arithmetic coding"},
+ { M_SOF14, "Differential progressive, arithmetic coding"},
+ { M_SOF15, "Differential lossless, arithmetic coding"},
+ { 0, "Unknown"}
+};
+
+//--------------------------------------------------------------------------
+// Parse the marker stream until SOS or EOI is seen;
+//--------------------------------------------------------------------------
+int ExifData::ReadJpegSections (QFile & infile, ReadMode_t ReadMode)
+{
+ int a;
+
+ a = infile.getch();
+
+ if (a != 0xff || infile.getch() != M_SOI) {
+ SectionsRead = 0;
+ return false;
+ }
+ for(SectionsRead = 0; SectionsRead < MAX_SECTIONS-1; ){
+ int marker = 0;
+ int got;
+ unsigned int ll,lh;
+ unsigned int itemlen;
+ uchar * Data;
+
+ for (a=0;a<7;a++){
+ marker = infile.getch();
+ if (marker != 0xff) break;
+
+ if (a >= 6){
+
+ owarn << "too many padding bytes" << oendl;
+ return false;
+
+ }
+ }
+
+ if (marker == 0xff){
+ // 0xff is legal padding, but if we get that many, something's wrong.
+ return false;
+ }
+
+ Sections[SectionsRead].Type = marker;
+
+ // Read the length of the section.
+ lh = (uchar) infile.getch();
+ ll = (uchar) infile.getch();
+
+ itemlen = (lh << 8) | ll;
+
+ if (itemlen < 2) {
+ return false;;
+ }
+
+ Sections[SectionsRead].Size = itemlen;
+
+ Data = (uchar *)malloc(itemlen+1); // Add 1 to allow sticking a 0 at the end.
+ Sections[SectionsRead].Data = Data;
+
+ // Store first two pre-read bytes.
+ Data[0] = (uchar)lh;
+ Data[1] = (uchar)ll;
+
+ got = infile.readBlock((char*)Data+2, itemlen-2); // Read the whole section.
+ if (( unsigned ) got != itemlen-2){
+ return false;
+ }
+ SectionsRead++;
+
+ switch(marker){
+
+ case M_SOS: // stop before hitting compressed data
+ // If reading entire image is requested, read the rest of the data.
+ if (ReadMode & READ_IMAGE){
+ unsigned long size;
+
+ size = QMAX( 0ul, infile.size()-infile.at() );
+ Data = (uchar *)malloc(size);
+ if (Data == NULL){
+ return false;
+ }
+
+ got = infile.readBlock((char*)Data, size);
+ if (( unsigned ) got != size){
+ return false;
+ }
+
+ Sections[SectionsRead].Data = Data;
+ Sections[SectionsRead].Size = size;
+ Sections[SectionsRead].Type = PSEUDO_IMAGE_MARKER;
+ SectionsRead ++;
+ //HaveAll = 1;
+ }
+ return true;
+
+ case M_EOI: // in case it's a tables-only JPEG stream
+ owarn << "No image in jpeg!" << oendl;
+ return false;
+
+ case M_COM: // Comment section
+ // pieczy 2002-02-12
+ // now the User comment goes to UserComment
+ // so we can store a Comment section also in READ_EXIF mode
+ process_COM(Data, itemlen);
+ break;
+
+ case M_JFIF:
+ // Regular jpegs always have this tag, exif images have the exif
+ // marker instead, althogh ACDsee will write images with both markers.
+ // this program will re-create this marker on absence of exif marker.
+ // hence no need to keep the copy from the file.
+ free(Sections[--SectionsRead].Data);
+ break;
+
+ case M_EXIF:
+ // Seen files from some 'U-lead' software with Vivitar scanner
+ // that uses marker 31 for non exif stuff. Thus make sure
+ // it says 'Exif' in the section before treating it as exif.
+ if ((ReadMode & READ_EXIF) && memcmp(Data+2, "Exif", 4) == 0){
+ process_EXIF((uchar *)Data, itemlen);
+ }else{
+ // Discard this section.
+ free(Sections[--SectionsRead].Data);
+ }
+ break;
+
+ case M_SOF0:
+ case M_SOF1:
+ case M_SOF2:
+ case M_SOF3:
+ case M_SOF5:
+ case M_SOF6:
+ case M_SOF7:
+ case M_SOF9:
+ case M_SOF10:
+ case M_SOF11:
+ case M_SOF13:
+ case M_SOF14:
+ case M_SOF15:
+ process_SOFn(Data, marker);
+ default:
+ break;
+ break;
+ }
+ }
+ return true;
+}
+
+
+//--------------------------------------------------------------------------
+// Discard read data.
+//--------------------------------------------------------------------------
+void ExifData::DiscardData(void)
+{
+ for (int a=0; a < SectionsRead; a++)
+ free(Sections[a].Data);
+ SectionsRead = 0;
+}
+
+//--------------------------------------------------------------------------
+// Convert a 16 bit unsigned value from file's native byte order
+//--------------------------------------------------------------------------
+int ExifData::Get16u(void * Short)
+{
+ if (MotorolaOrder){
+ return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1];
+ }else{
+ return (((uchar *)Short)[1] << 8) | ((uchar *)Short)[0];
+ }
+}
+
+//--------------------------------------------------------------------------
+// Convert a 32 bit signed value from file's native byte order
+//--------------------------------------------------------------------------
+int ExifData::Get32s(void * Long)
+{
+ if (MotorolaOrder){
+ return ((( char *)Long)[0] << 24) | (((uchar *)Long)[1] << 16)
+ | (((uchar *)Long)[2] << 8 ) | (((uchar *)Long)[3] << 0 );
+ }else{
+ return ((( char *)Long)[3] << 24) | (((uchar *)Long)[2] << 16)
+ | (((uchar *)Long)[1] << 8 ) | (((uchar *)Long)[0] << 0 );
+ }
+}
+
+//--------------------------------------------------------------------------
+// Convert a 32 bit unsigned value from file's native byte order
+//--------------------------------------------------------------------------
+unsigned ExifData::Get32u(void * Long)
+{
+ return (unsigned)Get32s(Long) & 0xffffffff;
+}
+
+//--------------------------------------------------------------------------
+// Evaluate number, be it int, rational, or float from directory.
+//--------------------------------------------------------------------------
+double ExifData::ConvertAnyFormat(void * ValuePtr, int Format)
+{
+ double Value;
+ Value = 0;
+
+ switch(Format){
+ case FMT_SBYTE: Value = *(signed char *)ValuePtr; break;
+ case FMT_BYTE: Value = *(uchar *)ValuePtr; break;
+
+ case FMT_USHORT: Value = Get16u(ValuePtr); break;
+
+ case FMT_ULONG: Value = Get32u(ValuePtr); break;
+
+ case FMT_URATIONAL:
+ case FMT_SRATIONAL:
+ {
+ int Num,Den;
+ Num = Get32s(ValuePtr);
+ Den = Get32s(4+(char *)ValuePtr);
+ if (Den == 0){
+ Value = 0;
+ }else{
+ Value = (double)Num/Den;
+ }
+ break;
+ }
+
+ case FMT_SSHORT: Value = (signed short)Get16u(ValuePtr); break;
+ case FMT_SLONG: Value = Get32s(ValuePtr); break;
+
+ // Not sure if this is correct (never seen float used in Exif format)
+ case FMT_SINGLE: Value = (double)*(float *)ValuePtr; break;
+ case FMT_DOUBLE: Value = *(double *)ValuePtr; break;
+ }
+ return Value;
+}
+
+//--------------------------------------------------------------------------
+// Process one of the nested EXIF directories.
+//--------------------------------------------------------------------------
+void ExifData::ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, unsigned ExifLength)
+{
+ int de;
+ int a;
+ int NumDirEntries;
+ unsigned ThumbnailOffset = 0;
+ unsigned ThumbnailSize = 0;
+
+ NumDirEntries = Get16u(DirStart);
+ #define DIR_ENTRY_ADDR(Start, Entry) (Start+2+12*(Entry))
+
+ {
+ unsigned char * DirEnd;
+ DirEnd = DIR_ENTRY_ADDR(DirStart, NumDirEntries);
+ if (DirEnd+4 > (OffsetBase+ExifLength)){
+ if (DirEnd+2 == OffsetBase+ExifLength || DirEnd == OffsetBase+ExifLength){
+ // Version 1.3 of jhead would truncate a bit too much.
+ // This also caught later on as well.
+ }else{
+ // Note: Files that had thumbnails trimmed with jhead 1.3 or earlier
+ // might trigger this.
+ return;
+ }
+ }
+ if (DirEnd < LastExifRefd) LastExifRefd = DirEnd;
+ }
+
+ for (de=0;de<NumDirEntries;de++){
+ int Tag, Format, Components;
+ unsigned char * ValuePtr;
+ int ByteCount;
+ char * DirEntry;
+ DirEntry = (char *)DIR_ENTRY_ADDR(DirStart, de);
+
+ Tag = Get16u(DirEntry);
+ Format = Get16u(DirEntry+2);
+ Components = Get32u(DirEntry+4);
+
+ if ((Format-1) >= NUM_FORMATS) {
+ // (-1) catches illegal zero case as unsigned underflows to positive large.
+ return;
+ }
+
+ ByteCount = Components * BytesPerFormat[Format];
+
+ if (ByteCount > 4){
+ unsigned OffsetVal;
+ OffsetVal = Get32u(DirEntry+8);
+ // If its bigger than 4 bytes, the dir entry contains an offset.
+ if (OffsetVal+ByteCount > ExifLength){
+ // Bogus pointer offset and / or bytecount value
+ //printf("Offset %d bytes %d ExifLen %d\n",OffsetVal, ByteCount, ExifLength);
+
+ return;
+ }
+ ValuePtr = OffsetBase+OffsetVal;
+ }else{
+ // 4 bytes or less and value is in the dir entry itself
+ ValuePtr = (unsigned char *)DirEntry+8;
+ }
+
+ if (LastExifRefd < ValuePtr+ByteCount){
+ // Keep track of last byte in the exif header that was actually referenced.
+ // That way, we know where the discardable thumbnail data begins.
+ LastExifRefd = ValuePtr+ByteCount;
+ }
+
+ // Extract useful components of tag
+ switch(Tag){
+
+ case TAG_MAKE:
+ ExifData::CameraMake = QString((char*)ValuePtr);
+ break;
+
+ case TAG_MODEL:
+ ExifData::CameraModel = QString((char*)ValuePtr);
+ break;
+
+ case TAG_ORIENTATION:
+ Orientation = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_DATETIME_ORIGINAL:
+ DateTime = QString((char*)ValuePtr);
+ break;
+
+ case TAG_USERCOMMENT:
+ // Olympus has this padded with trailing spaces. Remove these first.
+ for (a=ByteCount;;){
+ a--;
+ if ((ValuePtr)[a] == ' '){
+ (ValuePtr)[a] = '\0';
+ }else{
+ break;
+ }
+ if (a == 0) break;
+ }
+
+ // Copy the comment
+ if (memcmp(ValuePtr, "ASCII",5) == 0){
+ for (a=5;a<10;a++){
+ int c;
+ c = (ValuePtr)[a];
+ if (c != '\0' && c != ' '){
+ //strncpy(ImageInfo.Comments, (const char*)(a+ValuePtr), 199);
+ UserComment.sprintf("%s", (const char*)(a+ValuePtr));
+ break;
+ }
+ }
+ }else{
+ //strncpy(ImageInfo.Comments, (const char*)ValuePtr, 199);
+ UserComment.sprintf("%s", (const char*)ValuePtr);
+ }
+ break;
+
+ case TAG_FNUMBER:
+ // Simplest way of expressing aperture, so I trust it the most.
+ // (overwrite previously computd value if there is one)
+ ExifData::ApertureFNumber = (float)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_APERTURE:
+ case TAG_MAXAPERTURE:
+ // More relevant info always comes earlier, so only use this field if we don't
+ // have appropriate aperture information yet.
+ if (ExifData::ApertureFNumber == 0){
+ ExifData::ApertureFNumber
+ = (float)exp(ConvertAnyFormat(ValuePtr, Format)*log(2)*0.5);
+ }
+ break;
+
+ case TAG_FOCALLENGTH:
+ // Nice digital cameras actually save the focal length as a function
+ // of how farthey are zoomed in.
+ ExifData::FocalLength = (float)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_SUBJECT_DISTANCE:
+ // Inidcates the distacne the autofocus camera is focused to.
+ // Tends to be less accurate as distance increases.
+ ExifData::Distance = (float)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_EXPOSURETIME:
+ // Simplest way of expressing exposure time, so I trust it most.
+ // (overwrite previously computd value if there is one)
+ ExifData::ExposureTime = (float)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_SHUTTERSPEED:
+ // More complicated way of expressing exposure time, so only use
+ // this value if we don't already have it from somewhere else.
+ if (ExifData::ExposureTime == 0){
+ ExifData::ExposureTime
+ = (float)(1/exp(ConvertAnyFormat(ValuePtr, Format)*log(2)));
+ }
+ break;
+
+ case TAG_FLASH:
+ if (ConvertAnyFormat(ValuePtr, Format)){
+ ExifData::FlashUsed = 1;
+ }
+ break;
+
+ case TAG_EXIF_IMAGELENGTH:
+ ExifImageLength = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_EXIF_IMAGEWIDTH:
+ ExifImageWidth = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_FOCALPLANEXRES:
+ FocalplaneXRes = ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_FOCALPLANEUNITS:
+ switch((int)ConvertAnyFormat(ValuePtr, Format)){
+ case 1: FocalplaneUnits = 25.4; break; // inch
+ case 2:
+ // According to the information I was using, 2 means meters.
+ // But looking at the Cannon powershot's files, inches is the only
+ // sensible value.
+ FocalplaneUnits = 25.4;
+ break;
+
+ case 3: FocalplaneUnits = 10; break; // centimeter
+ case 4: FocalplaneUnits = 1; break; // milimeter
+ case 5: FocalplaneUnits = .001; break; // micrometer
+ }
+ break;
+
+ // Remaining cases contributed by: Volker C. Schoech (schoech@gmx.de)
+
+ case TAG_EXPOSURE_BIAS:
+ ExifData::ExposureBias = (float)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_WHITEBALANCE:
+ ExifData::Whitebalance = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_METERING_MODE:
+ ExifData::MeteringMode = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_EXPOSURE_PROGRAM:
+ ExifData::ExposureProgram = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_ISO_EQUIVALENT:
+ ExifData::ISOequivalent = (int)ConvertAnyFormat(ValuePtr, Format);
+ if ( ExifData::ISOequivalent < 50 ) ExifData::ISOequivalent *= 200;
+ break;
+
+ case TAG_COMPRESSION_LEVEL:
+ ExifData::CompressionLevel = (int)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_THUMBNAIL_OFFSET:
+ ThumbnailOffset = (unsigned)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ case TAG_THUMBNAIL_LENGTH:
+ ThumbnailSize = (unsigned)ConvertAnyFormat(ValuePtr, Format);
+ break;
+
+ }
+
+ if (Tag == TAG_EXIF_OFFSET || Tag == TAG_INTEROP_OFFSET){
+ unsigned char * SubdirStart;
+ SubdirStart = OffsetBase + Get32u(ValuePtr);
+ if (SubdirStart < OffsetBase || SubdirStart > OffsetBase+ExifLength){
+ return;
+ }
+ ProcessExifDir(SubdirStart, OffsetBase, ExifLength);
+ continue;
+ }
+ }
+
+ {
+ // In addition to linking to subdirectories via exif tags,
+ // there's also a potential link to another directory at the end of each
+ // directory. this has got to be the result of a comitee!
+ unsigned char * SubdirStart;
+ unsigned Offset;
+
+ if (DIR_ENTRY_ADDR(DirStart, NumDirEntries) + 4 <= OffsetBase+ExifLength){
+ Offset = Get32u(DIR_ENTRY_ADDR(DirStart, NumDirEntries));
+ // There is at least one jpeg from an HP camera having an Offset of almost MAXUINT.
+ // Adding OffsetBase to it produces an overflow, so compare with ExifLength here.
+ // See http://bugs.kde.org/show_bug.cgi?id=54542
+ if (Offset && Offset < ExifLength){
+ SubdirStart = OffsetBase + Offset;
+ if (SubdirStart > OffsetBase+ExifLength){
+ if (SubdirStart < OffsetBase+ExifLength+20){
+ // Jhead 1.3 or earlier would crop the whole directory!
+ // As Jhead produces this form of format incorrectness,
+ // I'll just let it pass silently
+ owarn << "Thumbnail removed with Jhead 1.3 or earlier" << oendl;
+ }else{
+ return;
+ }
+ }else{
+ if (SubdirStart <= OffsetBase+ExifLength){
+ ProcessExifDir(SubdirStart, OffsetBase, ExifLength);
+ }
+ }
+ }
+ }else{
+ // The exif header ends before the last next directory pointer.
+ }
+ }
+
+ if (ThumbnailSize && ThumbnailOffset){
+ if (ThumbnailSize + ThumbnailOffset <= ExifLength){
+ // The thumbnail pointer appears to be valid. Store it.
+ Thumbnail.loadFromData(OffsetBase + ThumbnailOffset, ThumbnailSize, "JPEG");
+ }
+ }
+}
+
+//--------------------------------------------------------------------------
+// Process a COM marker. We want to leave the bytes unchanged. The
+// progam that displays this text may decide to remove blanks, convert
+// newlines, or otherwise modify the text. In particular we want to be
+// safe for passing utf-8 text.
+//--------------------------------------------------------------------------
+void ExifData::process_COM (const uchar * Data, int length)
+{
+ QChar ch;
+ int a;
+
+ for (a=2;a<length;a++){
+ ch = Data[a];
+ if (ch == '\000') continue; // Remove nulls
+ Comment.append(ch);
+ }
+}
+
+
+//--------------------------------------------------------------------------
+// Process a SOFn marker. This is useful for the image dimensions
+//--------------------------------------------------------------------------
+void ExifData::process_SOFn (const uchar * Data, int marker)
+{
+ int data_precision, num_components;
+
+ data_precision = Data[2];
+ ExifData::Height = Get16m(Data+3);
+ ExifData::Width = Get16m(Data+5);
+ num_components = Data[7];
+
+ if (num_components == 3){
+ ExifData::IsColor = 1;
+ }else{
+ ExifData::IsColor = 0;
+ }
+
+ ExifData::Process = marker;
+
+}
+
+//--------------------------------------------------------------------------
+// Get 16 bits motorola order (always) for jpeg header stuff.
+//--------------------------------------------------------------------------
+int ExifData::Get16m(const void * Short)
+{
+ return (((uchar *)Short)[0] << 8) | ((uchar *)Short)[1];
+}
+
+
+//--------------------------------------------------------------------------
+// Process a EXIF marker
+// Describes all the drivel that most digital cameras include...
+//--------------------------------------------------------------------------
+void ExifData::process_EXIF(unsigned char * CharBuf, unsigned int length)
+{
+ ExifData::FlashUsed = 0; // If it s from a digicam, and it used flash, it says so.
+
+ FocalplaneXRes = 0;
+ FocalplaneUnits = 0;
+ ExifImageWidth = 0;
+ ExifImageLength = 0;
+
+ { // Check the EXIF header component
+ static const uchar ExifHeader[] = "Exif\0\0";
+ if (memcmp(CharBuf+2, ExifHeader,6)){
+ return;
+ }
+ }
+
+ if (memcmp(CharBuf+8,"II",2) == 0){
+ // printf("Exif section in Intel order\n");
+ MotorolaOrder = 0;
+ }else{
+ if (memcmp(CharBuf+8,"MM",2) == 0){
+ // printf("Exif section in Motorola order\n");
+ MotorolaOrder = 1;
+ }else{
+ return;
+ }
+ }
+
+ // Check the next two values for correctness.
+ if (Get16u(CharBuf+10) != 0x2a
+ || Get32u(CharBuf+12) != 0x08){
+ return;
+ }
+
+ LastExifRefd = CharBuf;
+
+ // First directory starts 16 bytes in. Offsets start at 8 bytes in.
+ ProcessExifDir(CharBuf+16, CharBuf+8, length-6);
+
+ // This is how far the interesting (non thumbnail) part of the exif went.
+ ExifSettingsLength = LastExifRefd - CharBuf;
+
+ // Compute the CCD width, in milimeters.
+ if (FocalplaneXRes != 0){
+ ExifData::CCDWidth = (float)(ExifImageWidth * FocalplaneUnits / FocalplaneXRes);
+ }
+}
+
+//--------------------------------------------------------------------------
+// Convert exif time to Unix time structure
+//--------------------------------------------------------------------------
+int ExifData::Exif2tm(struct ::tm * timeptr, char * ExifTime)
+{
+ int a;
+
+ timeptr->tm_wday = -1;
+
+ // Check for format: YYYY:MM:DD HH:MM:SS format.
+ a = sscanf(ExifTime, "%d:%d:%d %d:%d:%d",
+ &timeptr->tm_year, &timeptr->tm_mon, &timeptr->tm_mday,
+ &timeptr->tm_hour, &timeptr->tm_min, &timeptr->tm_sec);
+
+ if (a == 6){
+ timeptr->tm_isdst = -1;
+ timeptr->tm_mon -= 1; // Adjust for unix zero-based months
+ timeptr->tm_year -= 1900; // Adjust for year starting at 1900
+ return true; // worked.
+ }
+
+ return false; // Wasn't in Exif date format.
+}
+
+//--------------------------------------------------------------------------
+// Contructor for initialising
+//--------------------------------------------------------------------------
+ExifData::ExifData()
+{
+ ExifData::Whitebalance = -1;
+ ExifData::MeteringMode = -1;
+ ExifData::FlashUsed = -1;
+ Orientation = 0;
+ Height = 0;
+ Width = 0;
+ IsColor = 0;
+ Process = 0;
+ FocalLength = 0;
+ ExposureTime = 0;
+ ApertureFNumber = 0;
+ Distance = 0;
+ CCDWidth = 0;
+ ExposureBias = 0;
+ ExposureProgram = 0;
+ ISOequivalent = 0;
+ CompressionLevel = 0;
+ MotorolaOrder = 0;
+}
+
+ExifData::~ExifData()
+{
+}
+
+//--------------------------------------------------------------------------
+// process a EXIF jpeg file
+//--------------------------------------------------------------------------
+bool ExifData::scan(const QString & path)
+{
+ int ret;
+
+ QFile f(path);
+ f.open(IO_ReadOnly);
+
+ // Scan the JPEG headers.
+ ret = ReadJpegSections(f, READ_EXIF);
+
+ if (ret == false){
+ owarn << "Not JPEG file!" << oendl;
+ DiscardData();
+ f.close();
+ return false;
+ }
+ f.close();
+ DiscardData();
+
+ //now make the strings clean,
+ // for exmaple my Casio is a "QV-4000 "
+ CameraMake = CameraMake.stripWhiteSpace();
+ CameraModel = CameraModel.stripWhiteSpace();
+ UserComment = UserComment.stripWhiteSpace();
+ Comment = Comment.stripWhiteSpace();
+ return true;
+}
+
+//--------------------------------------------------------------------------
+// Does the embedded thumbnail match the jpeg image?
+//--------------------------------------------------------------------------
+#ifndef JPEG_TOL
+#define JPEG_TOL 0.02
+#endif
+bool ExifData::isThumbnailSane() {
+ if (Thumbnail.isNull()) return false;
+
+ // check whether thumbnail dimensions match the image
+ // not foolproof, but catches some altered images (jpegtran -rotate)
+ if (ExifImageLength != 0 && ExifImageLength != Height) return false;
+ if (ExifImageWidth != 0 && ExifImageWidth != Width) return false;
+ if (Thumbnail.width() == 0 || Thumbnail.height() == 0) return false;
+ if (Height == 0 || Width == 0) return false;
+ double d = (double)Height/Width*Thumbnail.width()/Thumbnail.height();
+ return (1-JPEG_TOL < d) && (d < 1+JPEG_TOL);
+}
+
+
+
+static QImage flip_image( const QImage& img );
+static QImage rotate_90( const QImage& img );
+static QImage rotate_180( const QImage& );
+static QImage rotate_270( const QImage& );
+
+//--------------------------------------------------------------------------
+// return a thumbnail that respects the orientation flag
+// only if it seems sane
+//--------------------------------------------------------------------------
+QImage ExifData::getThumbnail() {
+ if (!isThumbnailSane()) return NULL;
+ if (!Orientation || Orientation == 1) return Thumbnail;
+
+ // now fix orientation
+
+ QImage dest = Thumbnail;
+ switch (Orientation) { // notice intentional fallthroughs
+ case 2: dest = flip_image( dest ); break;
+ case 4: dest = flip_image( dest );
+ case 3: dest =rotate_180( dest ); break;
+ case 5: dest = flip_image( dest );
+ case 6: dest = rotate_90( dest ); break;
+ case 7: dest = flip_image( dest );
+ case 8: dest = rotate_270( dest ); break;
+ default: break; // should never happen
+ }
+ return dest;
+}
+
+
+/*
+ *
+ */
+static QImage flip_image( const QImage& img ) {
+ return img.mirror( TRUE, FALSE );
+}
+
+
+static QImage dest;
+static int x, y;
+static unsigned int *srcData, *destData; // we're not threaded anyway
+static unsigned char *srcData8, *destData8; // 8 bit is char
+static unsigned int *srcTable, *destTable; // destination table
+
+
+static QImage rotate_90_8( const QImage &img ) {
+ dest.create(img.height(), img.width(), img.depth());
+ dest.setNumColors(img.numColors());
+ srcTable = (unsigned int *)img.colorTable();
+ destTable = (unsigned int *)dest.colorTable();
+ for ( x=0; x < img.numColors(); ++x )
+ destTable[x] = srcTable[x];
+ for ( y=0; y < img.height(); ++y ){
+ srcData8 = (unsigned char *)img.scanLine(y);
+ for ( x=0; x < img.width(); ++x ){
+ destData8 = (unsigned char *)dest.scanLine(x);
+ destData8[img.height()-y-1] = srcData8[x];
+ }
+ }
+ return dest;
+}
+
+static QImage rotate_90_all( const QImage& img ) {
+ dest.create(img.height(), img.width(), img.depth());
+ for ( y=0; y < img.height(); ++y ) {
+ srcData = (unsigned int *)img.scanLine(y);
+ for ( x=0; x < img.width(); ++x ) {
+ destData = (unsigned int *)dest.scanLine(x);
+ destData[img.height()-y-1] = srcData[x];
+ }
+ }
+
+ return dest;
+}
+
+
+static QImage rotate_90( const QImage & img ) {
+ if ( img.depth() > 8)
+ return rotate_90_all( img );
+ else
+ return rotate_90_8( img );
+}
+
+static QImage rotate_180_all( const QImage& img ) {
+ dest.create(img.width(), img.height(), img.depth());
+ for ( y=0; y < img.height(); ++y ){
+ srcData = (unsigned int *)img.scanLine(y);
+ destData = (unsigned int *)dest.scanLine(img.height()-y-1);
+ for ( x=0; x < img.width(); ++x )
+ destData[img.width()-x-1] = srcData[x];
+ }
+ return dest;
+}
+
+static QImage rotate_180_8( const QImage& img ) {
+ dest.create(img.width(), img.height(), img.depth());
+ dest.setNumColors(img.numColors());
+ srcTable = (unsigned int *)img.colorTable();
+ destTable = (unsigned int *)dest.colorTable();
+ for ( x=0; x < img.numColors(); ++x )
+ destTable[x] = srcTable[x];
+ for ( y=0; y < img.height(); ++y ){
+ srcData8 = (unsigned char *)img.scanLine(y);
+ destData8 = (unsigned char *)dest.scanLine(img.height()-y-1);
+ for ( x=0; x < img.width(); ++x )
+ destData8[img.width()-x-1] = srcData8[x];
+ }
+ return dest;
+}
+
+static QImage rotate_180( const QImage& img ) {
+ if ( img.depth() > 8 )
+ return rotate_180_all( img );
+ else
+ return rotate_180_8( img );
+}
+
+
+static QImage rotate_270_8( const QImage& img ) {
+ dest.create(img.height(), img.width(), img.depth());
+ dest.setNumColors(img.numColors());
+ srcTable = (unsigned int *)img.colorTable();
+ destTable = (unsigned int *)dest.colorTable();
+ for ( x=0; x < img.numColors(); ++x )
+ destTable[x] = srcTable[x];
+ for ( y=0; y < img.height(); ++y ){
+ srcData8 = (unsigned char *)img.scanLine(y);
+ for ( x=0; x < img.width(); ++x ){
+ destData8 = (unsigned char *)dest.scanLine(img.width()-x-1);
+ destData8[y] = srcData8[x];
+ }
+ }
+
+ return dest;
+}
+
+static QImage rotate_270_all( const QImage& img ) {
+ dest.create(img.height(), img.width(), img.depth());
+ for ( y=0; y < img.height(); ++y ){
+ srcData = (unsigned int *)img.scanLine(y);
+ for ( x=0; x < img.width(); ++x ){
+ destData = (unsigned int *)dest.scanLine(img.width()-x-1);
+ destData[y] = srcData[x];
+ }
+ }
+ return dest;
+}
+
+static QImage rotate_270( const QImage& img ) {
+ if ( img.depth() > 8 )
+ return rotate_270_all( img );
+ else
+ return rotate_270_8( img );
+}
+
+
+static QString color_mode_to_string( bool b ) {
+ return b ? QObject::tr( "Colormode: Color\n" ) : QObject::tr( "Colormode: Black and white\n" );
+}
+
+static QString compression_to_string( int level ) {
+ QString str;
+ switch( level ) {
+ case 1:
+ str = QObject::tr( "Basic" );
+ break;
+ case 2:
+ str = QObject::tr( "Normal" );
+ break;
+ case 4:
+ str = QObject::tr( "Fine" );
+ break;
+ default:
+ str = QObject::tr( "Unknown" );
+
+ }
+ return QObject::tr("Quality: %1\n").arg(str);
+}
+
+
+static QDateTime parseDateTime( const QString& string )
+{
+ QDateTime dt;
+ if ( string.length() != 19 )
+ return dt;
+
+ QString year = string.left( 4 );
+ QString month = string.mid( 5, 2 );
+ QString day = string.mid( 8, 2 );
+ QString hour = string.mid( 11, 2 );
+ QString minute = string.mid( 14, 2 );
+ QString seconds = string.mid( 18, 2 );
+
+ bool ok;
+ bool allOk = true;
+ int y = year.toInt( &ok );
+ allOk &= ok;
+
+ int mo = month.toInt( &ok );
+ allOk &= ok;
+
+ int d = day.toInt( &ok );
+ allOk &= ok;
+
+ int h = hour.toInt( &ok );
+ allOk &= ok;
+
+ int mi = minute.toInt( &ok );
+ allOk &= ok;
+
+ int s = seconds.toInt( &ok );
+ allOk &= ok;
+
+ if ( allOk ) {
+ dt.setDate( QDate( y, mo, d ) );
+ dt.setTime( QTime( h, mi, s ) );
+ }
+
+ return dt;
+}
+
+static QString white_balance_string( int i ) {
+ QString balance;
+ switch ( i ) {
+ case 0:
+ balance = QObject::tr( "Unknown" );
+ break;
+ case 1:
+ balance = QObject::tr( "Daylight" );
+ break;
+ case 2:
+ balance = QObject::tr( "Fluorescent" );
+ break;
+ case 3:
+ balance = QObject::tr( "Tungsten" );
+ break;
+ case 17:
+ balance = QObject::tr( "Standard light A" );
+ break;
+ case 18:
+ balance = QObject::tr( "Standard light B" );
+ break;
+ case 19:
+ balance = QObject::tr( "Standard light C" );
+ break;
+ case 20:
+ balance = QObject::tr( "D55" );
+ break;
+ case 21:
+ balance = QObject::tr( "D65" );
+ break;
+ case 22:
+ balance = QObject::tr( "D75" );
+ break;
+ case 255:
+ balance = QObject::tr( "Other" );
+ break;
+ default:
+ balance = QObject::tr( "Unknown" );
+ }
+ return QObject::tr( "White Balance: %1\n" ).arg( balance );
+
+}
+
+
+static QString metering_mode( int i) {
+ QString meter;
+ switch( i ) {
+ case 0:
+ meter = QObject::tr( "Unknown" );
+ break;
+ case 1:
+ meter = QObject::tr( "Average" );
+ break;
+ case 2:
+ meter = QObject::tr( "Center weighted average" );
+ break;
+ case 3:
+ meter = QObject::tr( "Spot" );
+ break;
+ case 4:
+ meter = QObject::tr( "MultiSpot" );
+ break;
+ case 5:
+ meter = QObject::tr( "Pattern" );
+ break;
+ case 6:
+ meter = QObject::tr( "Partial" );
+ break;
+ case 255:
+ meter = QObject::tr( "Other" );
+ break;
+ default:
+ meter = QObject::tr( "Unknown" );
+ }
+
+ return QObject::tr( "Metering Mode: %1\n" ).arg( meter );
+}
+
+
+static QString exposure_program( int i ) {
+ QString exp;
+ switch( i ) {
+ case 0:
+ exp = QObject::tr( "Not defined" );
+ break;
+ case 1:
+ exp = QObject::tr( "Manual" );
+ break;
+ case 2:
+ exp = QObject::tr( "Normal progam" );
+ break;
+ case 3:
+ exp = QObject::tr( "Aperture priority" );
+ break;
+ case 4:
+ exp = QObject::tr( "Shutter priority" );
+ break;
+ case 5:
+ exp = QObject::tr( "Creative progam\n(biased toward fast shutter speed" );
+ break;
+ case 6:
+ exp = QObject::tr( "Action progam\n(biased toward fast shutter speed)" );
+ break;
+ case 7:
+ exp = QObject::tr( "Portrait mode\n(for closeup photos with the background out of focus)" );
+ break;
+ case 8:
+ exp = QObject::tr( "Landscape mode\n(for landscape photos with the background in focus)" );
+ break;
+ default:
+ exp = QObject::tr( "Unknown" );
+ }
+
+ return QObject::tr( "Exposure Program: %1\n" ).arg( exp );
+}
+
+} // namespace MM
+} // namespace OPIE
diff --git a/libopie2/opiemm/opieexif.h b/libopie2/opiemm/opieexif.h
new file mode 100644
index 0000000..efaed71
--- a/dev/null
+++ b/libopie2/opiemm/opieexif.h
@@ -0,0 +1,139 @@
+#ifndef _OPIE_EXIF_H
+#define _OPIE_EXIF_H
+
+#include <qt.h>
+#include <qstring.h>
+#include <qimage.h>
+#include <qfile.h>
+
+#include <time.h>
+
+namespace Opie { namespace MM {
+
+#ifndef uchar
+typedef unsigned char uchar;
+#endif
+
+//#define MAX_SECTIONS 20
+//#define PSEUDO_IMAGE_MARKER 0x123; // Extra value.
+
+//! Class for reading exif data from images
+/*!
+ * This class is mostly used inside OImageScrollView for testing jpegs headers for a faster
+ * loading and scaling. It is taken from libexif and converted into an C++ structure.
+ *
+ * \see OImageScrollView
+ * \since 1.2
+ */
+class ExifData {
+public:
+ enum ReadMode_t {
+ READ_EXIF = 1,
+ READ_IMAGE = 2,
+ READ_ALL = 3
+ };
+
+ //--------------------------------------------------------------------------
+ // This structure is used to store jpeg file sections in memory.
+ struct Section_t {
+ uchar * Data;
+ int Type;
+ unsigned Size;
+ };
+
+ struct TagTable_t {
+ unsigned short Tag;
+ const char*const Desc;
+ };
+
+private:
+ static const int MAX_SECTIONS=20;
+ static const unsigned int PSEUDO_IMAGE_MARKER=0x123;
+ Section_t Sections[MAX_SECTIONS];
+
+ QString CameraMake;
+ QString CameraModel;
+ QString DateTime;
+ int Orientation;
+ int Height, Width;
+ int ExifImageLength, ExifImageWidth;
+ int IsColor;
+ int Process;
+ int FlashUsed;
+ float FocalLength;
+ float ExposureTime;
+ float ApertureFNumber;
+ float Distance;
+ int Whitebalance;
+ int MeteringMode;
+ float CCDWidth;
+ float ExposureBias;
+ int ExposureProgram;
+ int ISOequivalent;
+ int CompressionLevel;
+ QString UserComment;
+ QString Comment;
+ QImage Thumbnail;
+
+ unsigned char * LastExifRefd;
+ int ExifSettingsLength;
+ double FocalplaneXRes;
+ double FocalplaneUnits;
+ int MotorolaOrder;
+ int SectionsRead;
+
+ int ReadJpegSections (QFile & infile, ReadMode_t ReadMode);
+ void DiscardData(void);
+ int Get16u(void * Short);
+ int Get32s(void * Long);
+ unsigned Get32u(void * Long);
+ double ConvertAnyFormat(void * ValuePtr, int Format);
+ void ProcessExifDir(unsigned char * DirStart, unsigned char * OffsetBase, unsigned ExifLength);
+ void process_COM (const uchar * Data, int length);
+ void process_SOFn (const uchar * Data, int marker);
+ int Get16m(const void * Short);
+ void process_EXIF(unsigned char * CharBuf, unsigned int length);
+ int Exif2tm(struct ::tm * timeptr, char * ExifTime);
+
+public:
+ //! Contructor for initialising
+ ExifData();
+ //! destructor
+ virtual ~ExifData();
+ //! scan a given file
+ /*!
+ * try to scan the EXIF data of a image file
+ * \param aFile the file to scan
+ * \return true if success, otherwise false
+ */
+ bool scan(const QString &aFile);
+ QString getCameraMake() { return CameraMake; }
+ QString getCameraModel() { return CameraModel; }
+ QString getDateTime() { return DateTime; }
+ int getOrientation() { return Orientation; }
+ int getHeight() { return Height; }
+ int getWidth() { return Width; }
+ int getIsColor() { return IsColor; }
+ int getProcess() { return Process; }
+ int getFlashUsed() { return FlashUsed; }
+ float getFocalLength() { return FocalLength; }
+ float getExposureTime() { return ExposureTime; }
+ float getApertureFNumber() { return ApertureFNumber; }
+ float getDistance() { return Distance; }
+ int getWhitebalance() { return Whitebalance; }
+ int getMeteringMode() { return MeteringMode; }
+ float getCCDWidth() { return CCDWidth; }
+ float getExposureBias() { return ExposureBias; }
+ int getExposureProgram() { return ExposureProgram; }
+ int getISOequivalent() { return ISOequivalent; }
+ int getCompressionLevel() { return CompressionLevel; }
+ QString getUserComment() { return UserComment; }
+ QString getComment() { return Comment; }
+ QImage getThumbnail();
+ bool isThumbnailSane();
+ bool isNullThumbnail() { return !isThumbnailSane(); }
+};
+
+}
+}
+#endif
diff --git a/libopie2/opiemm/opiemm.pro b/libopie2/opiemm/opiemm.pro
index 09b5ed4..32580c8 100644
--- a/libopie2/opiemm/opiemm.pro
+++ b/libopie2/opiemm/opiemm.pro
@@ -1,8 +1,8 @@
TEMPLATE = lib
CONFIG += qt warn_on
DESTDIR = $(OPIEDIR)/lib
-HEADERS = osoundsystem.h oimagezoomer.h oimagescrollview.h
-SOURCES = osoundsystem.cpp oimagezoomer.cpp oimagescrollview.cpp
+HEADERS = osoundsystem.h oimagezoomer.h oimagescrollview.h opieexif.h
+SOURCES = osoundsystem.cpp oimagezoomer.cpp oimagescrollview.cpp opieexif.cpp
INTERFACES =
TARGET = opiemm2
VERSION = 1.9.0