| -rw-r--r-- | libopie2/opiemm/oimagescrollview.cpp | 14 | ||||
| -rw-r--r-- | libopie2/opiemm/opieexif.cpp | 1195 | ||||
| -rw-r--r-- | libopie2/opiemm/opieexif.h | 139 | ||||
| -rw-r--r-- | libopie2/opiemm/opiemm.pro | 4 |
4 files changed, 1346 insertions, 6 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 @@ -6,2 +6,3 @@ #include <opie2/owait.h> +#include <opie2/opieexif.h> @@ -89,2 +90,4 @@ void OImageScrollView::loadJpeg(bool interncall) if (!interncall) { + ExifData xf; + bool scanned = xf.scan(m_lastName); int wid, hei; @@ -97,6 +100,9 @@ void OImageScrollView::loadJpeg(bool interncall) } - 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); + 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; 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 @@ -3,4 +3,4 @@ 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 = |