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annotate src/jpeg_parser.h @ 1912:4417578c55f9

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improved mpo parser, consider individual image type code
author Vladimir Nadvornik <nadvornik@suse.cz>
date Sat, 09 Apr 2011 16:07:31 +0200
parents caca32ccd945
children af653599660d 26dfd7a4d130
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1909
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1 /*
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2 * Geeqie
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3 * (C) 2004 John Ellis
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4 * Copyright (C) 2008 - 2010 The Geeqie Team
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5 *
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6 * Author: Vladimir Nadvornik
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7 *
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8 * This software is released under the GNU General Public License (GNU GPL).
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9 * Please read the included file COPYING for more information.
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10 * This software comes with no warranty of any kind, use at your own risk!
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11 */
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12
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13 #ifndef JPEG_PARSER_H
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14 #define JPEG_PARSER_H
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15
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16 #define JPEG_MARKER 0xFF
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17 #define JPEG_MARKER_SOI 0xD8
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18 #define JPEG_MARKER_EOI 0xD9
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19 #define JPEG_MARKER_APP1 0xE1
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20 #define JPEG_MARKER_APP2 0xE2
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21
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22 /* jpeg container format:
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23 all data markers start with 0XFF
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24 2 byte long file start and end markers: 0xFFD8(SOI) and 0XFFD9(EOI)
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25 4 byte long data segment markers in format: 0xFFTTSSSSNNN...
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26 FF: 1 byte standard marker identifier
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27 TT: 1 byte data type
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28 SSSS: 2 bytes in Motorola byte alignment for length of the data.
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29 This value includes these 2 bytes in the count, making actual
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30 length of NN... == SSSS - 2.
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31 NNN.: the data in this segment
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32 */
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33
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34 gboolean jpeg_segment_find(guchar *data, guint size,
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35 guchar app_marker, const gchar *magic, guint magic_len,
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36 guint *seg_offset, guint *seg_length);
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37
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38
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39 typedef struct _MPOData MPOData;
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40 typedef struct _MPOEntry MPOEntry;
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41
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42 struct _MPOEntry {
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43 guint type_code;
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44 gboolean representative;
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45 gboolean dependent_child;
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46 gboolean dependent_parent;
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47 guint offset;
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48 guint length;
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49 guint dep1;
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50 guint dep2;
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51
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52 guint MPFVersion;
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53 guint MPIndividualNum;
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54 guint PanOrientation;
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55 double PanOverlap_H;
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56 double PanOverlap_V;
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57 guint BaseViewpointNum;
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58 double ConvergenceAngle;
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59 double BaselineLength;
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60 double VerticalDivergence;
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61 double AxisDistance_X;
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62 double AxisDistance_Y;
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63 double AxisDistance_Z;
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64 double YawAngle;
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65 double PitchAngle;
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66 double RollAngle;
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67
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68 };
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69
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70
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71 struct _MPOData {
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72 guint mpo_offset;
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73
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74 guint version;
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75 guint num_images;
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76 MPOEntry *images;
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77 };
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78
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79 MPOData* jpeg_get_mpo_data(guchar *data, guint size);
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80 void jpeg_mpo_data_free(MPOData *mpo);
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81
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82 #endif