Esempio n. 1
0
//--------------------------------------------------------------------------
// 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;
}
Esempio n. 2
0
//--------------------------------------------------------------------------
// 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;
    }
}    
Esempio n. 3
0
//--------------------------------------------------------------------------
// 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;
}
Esempio n. 4
0
//--------------------------------------------------------------------------
// 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;
}
Esempio n. 5
0
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;

}