jpeg.h

Go to the documentation of this file.

 
#ifndef LIBGPHOTO2_JPEG_H
#define LIBGPHOTO2_JPEG_H
 
#include <gphoto2/gphoto2-file.h>
 
typedef enum {
        JPEG_START=0xD8,        JPEG_COMMENT=0xFE,      JPEG_APPO=0xE0,
        JPEG_QUANTIZATION=0xDB, JPEG_HUFFMAN=0xC4,      JPEG_SOFC0=0xC0,
        JPEG_SSSEAHAL=0xDA,     JPEG_EOI=0xD9
} jpegmarker;
 
typedef struct chunk{
        int size;
        unsigned char *data;
} chunk;
 
typedef char jpeg_quantization_table[64];
 
typedef struct jpeg {
        int count;
        struct chunk *marker[20]; /* I think this should be big enough */
}jpeg;
 
chunk *gpi_jpeg_chunk_new(int length);
chunk *gpi_jpeg_chunk_new_filled(int length, char *data);
void gpi_jpeg_chunk_destroy(chunk *mychunk);
void gpi_jpeg_chunk_print(chunk *mychunk);
 
char  gpi_jpeg_findff(int *location, chunk *picture);
char  gpi_jpeg_findactivemarker(char *id, int *location, chunk *picture);
char *gpi_jpeg_markername(unsigned int c);
 
jpeg *gpi_jpeg_new        (void);
void  gpi_jpeg_destroy    (jpeg *myjpeg);
void  gpi_jpeg_add_marker (jpeg *myjpeg, chunk *picture, int start, int end);
void  gpi_jpeg_add_chunk  (jpeg *myjpeg, chunk *source);
void  gpi_jpeg_parse      (jpeg *myjpeg, chunk *picture);
void  gpi_jpeg_print      (jpeg *myjpeg);
 
chunk *gpi_jpeg_make_start   (void);
chunk *gpi_jpeg_make_SOFC    (int width, int height,
                             char vh1, char vh2, char vh3,
                             char q1, char q2, char q3);
chunk *gpi_jpeg_makeSsSeAhAl (int huffset1, int huffset2, int huffset3);
 
void gpi_jpeg_print_quantization_table(jpeg_quantization_table *table);
chunk *gpi_jpeg_make_quantization(const jpeg_quantization_table * table, char number);
jpeg_quantization_table *gpi_jpeg_quantization2table(chunk *qmarker);
 
jpeg *gpi_jpeg_header(int width, int height,
        char vh1, char vh2, char vh3,
        char q1, char q2, char q3,
        const jpeg_quantization_table *quant1, const jpeg_quantization_table *quant2,
        char huffset1, char huffset2, char huffset3,
        chunk *huff1, chunk *huff2, chunk *huff3, chunk *huff4);
 
char gpi_jpeg_write(CameraFile *file, const char *name, jpeg *myjpeg);
 
#endif /* !defined(LIBGPHOTO2_JPEG_H) */