static int
scan_JPEG_header (int verbose)
{
int marker;
/* Expect SOI at start of file */
if (first_marker() != M_SOI)
ERREXIT("Expected SOI marker first");
/* Scan miscellaneous markers until we reach SOS. */
for (;;) {
marker = next_marker();
switch (marker) {
case M_SOF0: /* Baseline */
case M_SOF1: /* Extended sequential, Huffman */
case M_SOF2: /* Progressive, Huffman */
case M_SOF3: /* Lossless, Huffman */
case M_SOF5: /* Differential sequential, Huffman */
case M_SOF6: /* Differential progressive, Huffman */
case M_SOF7: /* Differential lossless, Huffman */
case M_SOF9: /* Extended sequential, arithmetic */
case M_SOF10: /* Progressive, arithmetic */
case M_SOF11: /* Lossless, arithmetic */
case M_SOF13: /* Differential sequential, arithmetic */
case M_SOF14: /* Differential progressive, arithmetic */
case M_SOF15: /* Differential lossless, arithmetic */
if (verbose)
process_SOFn(marker);
else
skip_variable();
break;
case M_SOS: /* stop before hitting compressed data */
return marker;
case M_EOI: /* in case it's a tables-only JPEG stream */
return marker;
case M_COM:
process_COM();
break;
default: /* Anything else just gets skipped */
skip_variable(); /* we assume it has a parameter count... */
break;
}
} /* end loop */
}
static int
scan_JPEG_header (int verbose)
{
int marker;
/* Expect SOI at start of file */
if (first_marker() != M_SOI)
ERREXIT("Expected SOI marker first");
/* Scan miscellaneous markers until we reach SOS. */
for (;;) {
marker = next_marker();
switch (marker) {
/* Note that marker codes 0xC4, 0xC8, 0xCC are not, and must not be,
* treated as SOFn. C4 in particular is actually DHT.
*/
case M_SOF0: /* Baseline */
case M_SOF1: /* Extended sequential, Huffman */
case M_SOF2: /* Progressive, Huffman */
case M_SOF3: /* Lossless, Huffman */
case M_SOF5: /* Differential sequential, Huffman */
case M_SOF6: /* Differential progressive, Huffman */
case M_SOF7: /* Differential lossless, Huffman */
case M_SOF9: /* Extended sequential, arithmetic */
case M_SOF10: /* Progressive, arithmetic */
case M_SOF11: /* Lossless, arithmetic */
case M_SOF13: /* Differential sequential, arithmetic */
case M_SOF14: /* Differential progressive, arithmetic */
case M_SOF15: /* Differential lossless, arithmetic */
if (verbose)
process_SOFn(marker);
else
skip_variable();
break;
case M_SOS: /* stop before hitting compressed data */
return marker;
case M_EOI: /* in case it's a tables-only JPEG stream */
return marker;
case M_COM:
process_COM();
break;
case M_APP12:
/* Some digital camera makers put useful textual information into
* APP12 markers, so we print those out too when in -verbose mode.
*/
if (verbose) {
printf("APP12 contains:\n");
process_COM();
} else
skip_variable();
break;
default: /* Anything else just gets skipped */
skip_variable(); /* we assume it has a parameter count... */
break;
}
} /* end loop */
}
//--------------------------------------------------------------------------
// Parse the marker stream until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ReadJpegSections (FILE * infile, ReadMode_t ReadMode)
{
int a;
int HaveCom = FALSE;
a = fgetc(infile);
if (a != 0xff || fgetc(infile) != M_SOI){
return FALSE;
}
ImageInfo.JfifHeader.XDensity = ImageInfo.JfifHeader.YDensity = 300;
ImageInfo.JfifHeader.ResolutionUnits = 1;
for(;;){
int itemlen;
int prev;
int marker = 0;
int ll,lh, got;
uchar * Data;
CheckSectionsAllocated();
prev = 0;
for (a=0;;a++){
marker = fgetc(infile);
if (marker != 0xff && prev == 0xff) break;
prev = marker;
}
if (a > 10){
ErrNonfatal("Extraneous %d padding bytes before section %02X",a-1,marker);
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = fgetc(infile);
ll = fgetc(infile);
itemlen = (lh << 8) | ll;
if (itemlen < 2){
ErrFatal("invalid marker");
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL){
ErrFatal("Could not allocate memory");
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
got = fread(Data+2, 1, itemlen-2, infile); // Read the whole section.
if (got != itemlen-2){
ErrFatal("Premature end of file?");
}
SectionsRead += 1;
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){
int cp, ep, size;
// Determine how much file is left.
cp = ftell(infile);
fseek(infile, 0, SEEK_END);
ep = ftell(infile);
fseek(infile, cp, SEEK_SET);
size = ep-cp;
Data = (uchar *)malloc(size);
if (Data == NULL){
ErrFatal("could not allocate data for entire image");
}
got = fread(Data, 1, size, infile);
if (got != size){
ErrFatal("could not read the rest of the image");
}
CheckSectionsAllocated();
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
fprintf(stderr,"No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_METADATA) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
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.
if (memcmp(Data+2, "JFIF\0",5)){
fprintf(stderr,"Header missing JFIF marker\n");
}
if (itemlen < 16){
fprintf(stderr,"Jfif header too short\n");
goto ignore;
}
ImageInfo.JfifHeader.Present = TRUE;
ImageInfo.JfifHeader.ResolutionUnits = Data[9];
ImageInfo.JfifHeader.XDensity = (Data[10]<<8) | Data[11];
ImageInfo.JfifHeader.YDensity = (Data[12]<<8) | Data[13];
if (ShowTags){
printf("JFIF SOI marker: Units: %d ",ImageInfo.JfifHeader.ResolutionUnits);
switch(ImageInfo.JfifHeader.ResolutionUnits){
case 0: printf("(aspect ratio)"); break;
case 1: printf("(dots per inch)"); break;
case 2: printf("(dots per cm)"); break;
default: printf("(unknown)"); break;
}
printf(" X-density=%d Y-density=%d\n",ImageInfo.JfifHeader.XDensity, ImageInfo.JfifHeader.YDensity);
if (Data[14] || Data[15]){
fprintf(stderr,"Ignoring jfif header thumbnail\n");
}
}
ignore:
free(Sections[--SectionsRead].Data);
break;
case M_EXIF:
// There can be different section using the same marker.
if (ReadMode & READ_METADATA){
if (memcmp(Data+2, "Exif", 4) == 0){
process_EXIF(Data, itemlen);
break;
}else if (memcmp(Data+2, "http:", 5) == 0){
Sections[SectionsRead-1].Type = M_XMP; // Change tag for internal purposes.
if (ShowTags){
printf("Image cotains XMP section, %d bytes long\n", itemlen);
if (ShowTags){
ShowXmp(Sections[SectionsRead-1]);
}
}
break;
}
}
// Oterwise, discard this section.
free(Sections[--SectionsRead].Data);
break;
case M_IPTC:
if (ReadMode & READ_METADATA){
if (ShowTags){
printf("Image cotains IPTC section, %d bytes long\n", itemlen);
}
// Note: We just store the IPTC section. Its relatively straightforward
// and we don't act on any part of it, so just display it at parse time.
}else{
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);
break;
default:
// Skip any other sections.
if (ShowTags){
printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
//--------------------------------------------------------------------------
// Parse the marker buffer until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ReadJpegSectionsFromBuffer (unsigned char* buffer, unsigned int buffer_size, ReadMode_t ReadMode)
{
int a;
unsigned int pos = 0;
int HaveCom = FALSE;
if (!buffer) {
return FALSE;
}
if (buffer_size < 1) {
return FALSE;
}
a = (int) buffer[pos++];
if (a != 0xff || buffer[pos++] != M_SOI){
return FALSE;
}
for(;;){
int itemlen;
int marker = 0;
int ll,lh, got;
uchar * Data;
CheckSectionsAllocated();
for (a=0;a<=16;a++){
marker = buffer[pos++];
if (marker != 0xff) break;
if (a >= 16){
fprintf(stderr,"too many padding bytes\n");
return FALSE;
}
}
Sections[SectionsRead].Type = marker;
Sections[SectionsRead].Offset = pos;
// Read the length of the section.
lh = buffer[pos++];
ll = buffer[pos++];
itemlen = (lh << 8) | ll;
if (itemlen < 2) {
ALOGE("invalid marker");
return FALSE;
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL) {
ALOGE("Could not allocate memory");
return 0;
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
if (pos+itemlen-2 > buffer_size) {
ALOGE("Premature end of file?");
return FALSE;
}
memcpy(Data+2, buffer+pos, itemlen-2); // Read the whole section.
pos += itemlen-2;
SectionsRead += 1;
printf("reading marker %d", marker);
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){
int size;
// Determine how much file is left.
size = buffer_size - pos;
if (size < 1) {
ALOGE("could not read the rest of the image");
return FALSE;
}
Data = (uchar *)malloc(size);
if (Data == NULL) {
ALOGE("%d: could not allocate data for entire image size: %d", __LINE__, size);
return FALSE;
}
memcpy(Data, buffer+pos, size);
CheckSectionsAllocated();
Sections[SectionsRead].Data = Data;
Sections[SectionsRead].Offset = pos;
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
ALOGE("No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_METADATA) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
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:
// There can be different section using the same marker.
if (ReadMode & READ_METADATA){
if (memcmp(Data+2, "Exif", 4) == 0){
process_EXIF(Data, itemlen);
break;
}else if (memcmp(Data+2, "http:", 5) == 0){
Sections[SectionsRead-1].Type = M_XMP; // Change tag for internal purposes.
if (ShowTags){
ALOGD("Image cotains XMP section, %d bytes long\n", itemlen);
if (ShowTags){
ShowXmp(Sections[SectionsRead-1]);
}
}
break;
}
}
// Oterwise, discard this section.
free(Sections[--SectionsRead].Data);
break;
case M_IPTC:
if (ReadMode & READ_METADATA){
if (ShowTags){
ALOGD("Image cotains IPTC section, %d bytes long\n", itemlen);
}
// Note: We just store the IPTC section. Its relatively straightforward
// and we don't act on any part of it, so just display it at parse time.
}else{
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);
break;
default:
// Skip any other sections.
if (ShowTags){
ALOGD("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
//--------------------------------------------------------------------------
// Parse the marker stream until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ReadJpegSections (FILE * infile, ReadMode_t ReadMode)
{
int a;
int HaveCom = FALSE;
a = fgetc(infile);
if (a != 0xff || fgetc(infile) != M_SOI){
return FALSE;
}
for(;;){
int itemlen;
int marker = 0;
int ll,lh, got;
uchar * Data;
if (SectionsRead >= MAX_SECTIONS){
ErrFatal("Too many sections in jpg file");
}
for (a=0;a<7;a++){
marker = fgetc(infile);
if (marker != 0xff) break;
if (a >= 6){
printf("too many padding bytes\n");
return FALSE;
}
}
if (marker == 0xff){
// 0xff is legal padding, but if we get that many, something's wrong.
ErrFatal("too many padding bytes!");
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = fgetc(infile);
ll = fgetc(infile);
itemlen = (lh << 8) | ll;
if (itemlen < 2){
ErrFatal("invalid marker");
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL){
ErrFatal("Could not allocate memory");
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
got = fread(Data+2, 1, itemlen-2, infile); // Read the whole section.
if (got != itemlen-2){
ErrFatal("Premature end of file?");
}
SectionsRead += 1;
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){
int cp, ep, size;
// Determine how much file is left.
cp = ftell(infile);
fseek(infile, 0, SEEK_END);
ep = ftell(infile);
fseek(infile, cp, SEEK_SET);
size = ep-cp;
Data = (uchar *)malloc(size);
if (Data == NULL){
ErrFatal("could not allocate data for entire image");
}
got = fread(Data, 1, size, infile);
if (got != size){
ErrFatal("could not read the rest of the image");
}
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
printf("No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_EXIF) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
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(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);
break;
default:
// Skip any other sections.
if (ShowTags){
printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
bool Cexif::DecodeExif(const char *filename, int Thumb)
{
FileWrapper wrapper(filename, "r");
FILE * hFile = wrapper.handle;
if(!hFile) return false;
m_exifinfo = new EXIFINFO;
memset(m_exifinfo,0,sizeof(EXIFINFO));
freeinfo = true;
m_exifinfo->Thumnailstate = Thumb;
m_szLastError[0]='\0';
ExifImageWidth = MotorolaOrder = SectionsRead=0;
memset(&Sections, 0, MAX_SECTIONS * sizeof(Section_t));
int HaveCom = 0;
int a = fgetc(hFile);
strcpy(m_szLastError,"EXIF-Data not found");
if (a != 0xff || fgetc(hFile) != M_SOI) return false;
for(;;)
{
int marker = 0;
int ll,lh, got, itemlen;
unsigned char * Data;
if (SectionsRead >= MAX_SECTIONS)
{
strcpy(m_szLastError,"Too many sections in jpg file"); return false;
}
for (a=0;a<7;a++)
{
marker = fgetc(hFile);
if (marker != 0xff) break;
if (a >= 6)
{
strcpy(m_szLastError,"too many padding unsigned chars\n"); return false;
}
}
if (marker == 0xff)
{
strcpy(m_szLastError,"too many padding unsigned chars!"); return false;
}
Sections[SectionsRead].Type = marker;
lh = fgetc(hFile);
ll = fgetc(hFile);
itemlen = (lh << 8) | ll;
if (itemlen < 2)
{
strcpy(m_szLastError,"invalid marker"); return false;
}
Sections[SectionsRead].Size = itemlen;
Data = (unsigned char *)malloc(itemlen);
if (Data == NULL)
{
strcpy(m_szLastError,"Could not allocate memory"); return false;
}
Sections[SectionsRead].Data = Data;
Data[0] = (unsigned char)lh;
Data[1] = (unsigned char)ll;
got = fread(Data+2, 1, itemlen-2,hFile);
if (got != itemlen-2)
{
strcpy(m_szLastError,"Premature end of file?"); return false;
}
SectionsRead += 1;
switch(marker)
{
case M_SOS:
return true;
case M_EOI:
printf("No image in jpeg!\n");
return false;
case M_COM:
if (HaveCom)
{
free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
}
else
{
process_COM(Data, itemlen);
HaveCom = 1;
}
break;
case M_JFIF:
free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
break;
case M_EXIF:
if (memcmp(Data+2, "Exif", 4) == 0)
{
m_exifinfo->IsExif = process_EXIF((unsigned char *)Data+2, itemlen);
}
else
{
free(Sections[--SectionsRead].Data);
Sections[SectionsRead].Data=0;
}
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);
break;
default:
break;
}
}
return true;
}
//--------------------------------------------------------------------------
// 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) {
kdDebug(7034) << "too many padding bytes\n";
return false;
}
}
if (marker == 0xff) {
// 0xff is legal padding, but if we get that many, something's wrong.
throw FatalError("too many padding bytes!");
}
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) {
throw FatalError("invalid marker");
}
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) {
throw FatalError("reading from file");
}
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 = kMax( 0ul, infile.size()-infile.at() );
Data = (uchar *)malloc(size);
if (Data == NULL) {
throw FatalError("could not allocate data for entire image");
}
got = infile.readBlock((char*)Data, size);
if (( unsigned ) got != size) {
throw FatalError("could not read the rest of the image");
}
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
kdDebug(7034) << "No image in jpeg!\n";
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); // FIXME: This call
// requires Data to be array of at least 8 bytes. Code
// above only checks for itemlen < 2.
} 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); //FIXME: This call requires Data to
// be array of at least 8 bytes. Code above only checks for
// itemlen < 2.
break;
default:
break;
}
}
return true;
}
//--------------------------------------------------------------------------
// Parse the marker stream until SOS or EOI is seen;
//--------------------------------------------------------------------------
int ExifData::ReadJpegSections ( QFile & infile, ReadMode_t ReadMode )
{
int a;
int SectionsRead;
a = getch ( infile );
if ( a != 0xff || getch ( infile ) != M_SOI )
{
SectionsRead = 0;
return false;
}
for ( SectionsRead = 0; SectionsRead < MAX_SECTIONS-1; SectionsRead++ )
{
int marker = 0;
int got;
unsigned int ll,lh;
unsigned int itemlen;
uchar * Data;
for ( a=0;a<7;a++ )
{
marker = getch ( infile );
if ( marker != 0xff )
break;
if ( a >= 6 )
return false;
}
if ( marker == 0xff )
return false;
// Read the length of the section.
lh = ( uchar ) getch ( infile );
ll = ( uchar ) getch ( infile );
itemlen = ( lh << 8 ) | ll;
if ( itemlen < 2 )
return false;
Data = ( uchar * ) malloc ( itemlen+1 ); // Add 1 to allow sticking a 0 at the end.
// Store first two pre-read bytes.
Data[0] = ( uchar ) lh;
Data[1] = ( uchar ) ll;
got = infile.read ( ( char* ) Data+2, itemlen-2 ); // Read the whole section.
if ( ( unsigned ) got != itemlen-2 )
{
free(Data);
return false;
}
switch ( marker )
{
case M_SOS: // stop before hitting compressed data
free(Data);
return true;
case M_EOI: // in case it's a tables-only JPEG stream
free(Data);
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.
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 ); // FIXME: This call
// requires Data to be array of at least 8 bytes. Code
// above only checks for itemlen < 2.
exifDataValid = true;
}
// else
// {
// // Discard this section.
// free ( Sections[--SectionsRead].Data );
// return false;
// }
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 ); //FIXME: This call requires Data to
// be array of at least 8 bytes. Code above only checks for
// itemlen < 2.
break;
default:
break;
}
free(Data);
}
return true;
}
static int ReadJpegStreamSections (ReadMode_t ReadMode, CALLBACK_js_getc js_getc, CALLBACK_js_read js_read)
{
int a;
int HaveCom = FALSE;
a = js_getc();
if (a != 0xff || js_getc() != M_SOI){
ALOGE("a = %d",a);
return FALSE;
}
for(;;){
int itemlen;
int prev;
int marker = 0;
int ll,lh, got;
uchar * Data;
CheckSectionsAllocated();
prev = 0;
for (a=0;;a++){
marker = js_getc();
if (marker != 0xff && prev == 0xff) break;
prev = marker;
if(marker == EOF){
ALOGE("hit file end!!\n");
return FALSE;
}
}
if (a >= 4096){
ALOGD("get marker %x, prv %x, after (%d), L:%d!!\n", marker, prev, a, __LINE__);
}
Sections[SectionsRead].Type = marker;
// Read the length of the section.
lh = js_getc();
ll = js_getc();
itemlen = (lh << 8) | ll;
if (itemlen < 2){
// ErrFatal("invalid marker");
ALOGE("invalid marker");
return FALSE;
}
Sections[SectionsRead].Size = itemlen;
Data = (uchar *)malloc(itemlen);
if (Data == NULL){
// ErrFatal("Could not allocate memory");
ALOGE("Could not allocate memory");
return 0;
}
Sections[SectionsRead].Data = Data;
// Store first two pre-read bytes.
Data[0] = (uchar)lh;
Data[1] = (uchar)ll;
got = js_read(Data+2, 1, itemlen-2); // Read the whole section.
if (got != itemlen-2){
// ErrFatal("Premature end of file?");
ALOGE("Premature end of file?");
return FALSE;
}
SectionsRead += 1;
printf("reading marker %d", marker);
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){
int cp, ep, size;
// Determine how much file is left.
cp = ftell(infile);
fseek(infile, 0, SEEK_END);
ep = ftell(infile);
fseek(infile, cp, SEEK_SET);
size = ep-cp;
Data = (uchar *)malloc(size);
if (Data == NULL){
// ErrFatal("could not allocate data for entire image");
ALOGE("could not allocate data for entire image");
return FALSE;
}
got = fread(Data, 1, size, infile);
if (got != size){
// ErrFatal("could not read the rest of the image");
ALOGE("could not read the rest of the image");
return FALSE;
}
CheckSectionsAllocated();
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
ALOGE("No image in jpeg!\n");
fprintf(stderr,"No image in jpeg!\n");
return FALSE;
case M_COM: // Comment section
if (HaveCom || ((ReadMode & READ_METADATA) == 0)){
// Discard this section.
free(Sections[--SectionsRead].Data);
}else{
process_COM(Data, itemlen);
HaveCom = TRUE;
}
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:
// There can be different section using the same marker.
if (ReadMode & READ_METADATA){
if (memcmp(Data+2, "Exif", 4) == 0){
process_EXIF(Data, itemlen);
break;
}else if (memcmp(Data+2, "http:", 5) == 0){
Sections[SectionsRead-1].Type = M_XMP; // Change tag for internal purposes.
if (ShowTags){
printf("Image cotains XMP section, %d bytes long\n", itemlen);
if (ShowTags){
ShowXmp(Sections[SectionsRead-1]);
}
}
break;
}
}
// Oterwise, discard this section.
free(Sections[--SectionsRead].Data);
break;
case M_IPTC:
if (ReadMode & READ_METADATA){
if (ShowTags){
printf("Image cotains IPTC section, %d bytes long\n", itemlen);
}
// Note: We just store the IPTC section. Its relatively straightforward
// and we don't act on any part of it, so just display it at parse time.
}else{
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);
break;
default:
// Skip any other sections.
if (ShowTags){
printf("Jpeg section marker 0x%02x size %d\n",marker, itemlen);
}
break;
}
}
return TRUE;
}
