//--------------------------------------------------------------------------
// Add a section (assume it doesn't already exist) - used for
// adding comment sections and exif sections
//--------------------------------------------------------------------------
Section_t * CreateSection(int SectionType, unsigned char * Data, int Size)
{
Section_t * NewSection;
int a;
int NewIndex;
NewIndex = 2;
if (SectionType == M_EXIF) NewIndex = 0; // Exif alwas goes first!
// Insert it in third position - seems like a safe place to put
// things like comments.
if (SectionsRead < NewIndex){
// ErrFatal("Too few sections!");
ALOGE("Too few sections!");
return FALSE;
}
CheckSectionsAllocated();
for (a=SectionsRead;a>NewIndex;a--){
Sections[a] = Sections[a-1];
}
SectionsRead += 1;
NewSection = Sections+NewIndex;
NewSection->Type = SectionType;
NewSection->Size = Size;
NewSection->Data = Data;
return NewSection;
}
//--------------------------------------------------------------------------
// Discard everything but the exif and comment sections.
//--------------------------------------------------------------------------
void DiscardAllButExif(void)
{
Section_t ExifKeeper;
Section_t CommentKeeper;
Section_t IptcKeeper;
Section_t XmpKeeper;
int a;
memset(&ExifKeeper, 0, sizeof(ExifKeeper));
memset(&CommentKeeper, 0, sizeof(CommentKeeper));
memset(&IptcKeeper, 0, sizeof(IptcKeeper));
memset(&XmpKeeper, 0, sizeof(IptcKeeper));
for (a=0;a<SectionsRead;a++){
if (Sections[a].Type == M_EXIF && ExifKeeper.Type == 0){
ExifKeeper = Sections[a];
}else if (Sections[a].Type == M_XMP && XmpKeeper.Type == 0){
XmpKeeper = Sections[a];
}else if (Sections[a].Type == M_COM && CommentKeeper.Type == 0){
CommentKeeper = Sections[a];
}else if (Sections[a].Type == M_IPTC && IptcKeeper.Type == 0){
IptcKeeper = Sections[a];
}else{
free(Sections[a].Data);
}
}
SectionsRead = 0;
if (ExifKeeper.Type){
CheckSectionsAllocated();
Sections[SectionsRead++] = ExifKeeper;
}
if (CommentKeeper.Type){
CheckSectionsAllocated();
Sections[SectionsRead++] = CommentKeeper;
}
if (IptcKeeper.Type){
CheckSectionsAllocated();
Sections[SectionsRead++] = IptcKeeper;
}
if (XmpKeeper.Type){
CheckSectionsAllocated();
Sections[SectionsRead++] = XmpKeeper;
}
}
//--------------------------------------------------------------------------
// 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;
}
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;
}
