src/jpeg_segment.h

   1 /*
   2   +----------------------------------------------------------------------+
   3   | Author: yoya@awm.jp                                                  |
   4   +----------------------------------------------------------------------+
   5 */
   6
   7
   8 #ifndef __JPEG_SEGMENT_H__
   9 #define __JPEG_SEGMENT_H__
  10
  11 typedef struct jpeg_segment_node_ {
  12     int marker;
  13     unsigned char *data_ref; /* do NOT free! */
  14     unsigned long data_len;
  15     struct jpeg_segment_node_ *next;
  16 } jpeg_segment_node_t;
  17
  18 typedef struct jpeg_segment_ {
  19     jpeg_segment_node_t *head, *tail;
  20 } jpeg_segment_t;
  21
  22 extern jpeg_segment_t *jpeg_segment_create(void);
  23
  24 extern void jpeg_segment_append(jpeg_segment_t *jpeg_seg_head,
  25                                 int marker,
  26                                 unsigned char *data,
  27                                 unsigned long data_len);
  28
  29 extern jpeg_segment_t *jpeg_segment_parse(unsigned char *data,
  30                                           unsigned long data_len,
  31                                           int rst_scan);
  32
  33 extern int jpeg_segment_contain(jpeg_segment_t *jpeg_seg, int marker);
  34 extern unsigned char *jpeg_segment_steal_node(jpeg_segment_t *jpeg_seg,
  35                                               int marker,
  36                                               unsigned long *length);
  37 extern int jpeg_segment_delete_node(jpeg_segment_t *jpeg_seg, int marker);
  38 extern int jpeg_segment_peek_marker(jpeg_segment_t *jpeg_seg);
  39
  40 extern void jpeg_segment_print(jpeg_segment_t *jpeg_seg);
  41 extern unsigned char *jpeg_segment_output(jpeg_segment_t *jpeg_seg,
  42                                           unsigned long *length);
  43 extern void jpeg_segment_destroy(jpeg_segment_t *jpeg_seg);
  44
  45 extern char *jpeg_segment_get_marker_name(int marker);
  46
  47 #endif /* __JPEG_SEGMENT_H__ */