/src/libjpeg-turbo.main/jdmainct.h
Line | Count | Source |
1 | | /* |
2 | | * jdmainct.h |
3 | | * |
4 | | * This file was part of the Independent JPEG Group's software: |
5 | | * Copyright (C) 1994-1996, Thomas G. Lane. |
6 | | * For conditions of distribution and use, see the accompanying README.ijg |
7 | | * file. |
8 | | */ |
9 | | |
10 | | #define JPEG_INTERNALS |
11 | | #include "jpeglib.h" |
12 | | #include "jpegcomp.h" |
13 | | |
14 | | |
15 | | /* Private buffer controller object */ |
16 | | |
17 | | typedef struct { |
18 | | struct jpeg_d_main_controller pub; /* public fields */ |
19 | | |
20 | | /* Pointer to allocated workspace (M or M+2 row groups). */ |
21 | | JSAMPARRAY buffer[MAX_COMPONENTS]; |
22 | | |
23 | | boolean buffer_full; /* Have we gotten an iMCU row from decoder? */ |
24 | | JDIMENSION rowgroup_ctr; /* counts row groups output to postprocessor */ |
25 | | |
26 | | /* Remaining fields are only used in the context case. */ |
27 | | |
28 | | /* These are the master pointers to the funny-order pointer lists. */ |
29 | | JSAMPIMAGE xbuffer[2]; /* pointers to weird pointer lists */ |
30 | | |
31 | | int whichptr; /* indicates which pointer set is now in use */ |
32 | | int context_state; /* process_data state machine status */ |
33 | | JDIMENSION rowgroups_avail; /* row groups available to postprocessor */ |
34 | | JDIMENSION iMCU_row_ctr; /* counts iMCU rows to detect image top/bot */ |
35 | | } my_main_controller; |
36 | | |
37 | | typedef my_main_controller *my_main_ptr; |
38 | | |
39 | | |
40 | | /* context_state values: */ |
41 | 1.10M | #define CTX_PREPARE_FOR_IMCU 0 /* need to prepare for MCU row */ |
42 | 2.66M | #define CTX_PROCESS_IMCU 1 /* feeding iMCU to postprocessor */ |
43 | 1.07M | #define CTX_POSTPONED_ROW 2 /* feeding postponed row group */ |
44 | | |
45 | | |
46 | | LOCAL(void) |
47 | | set_wraparound_pointers(j_decompress_ptr cinfo) |
48 | | /* Set up the "wraparound" pointers at top and bottom of the pointer lists. |
49 | | * This changes the pointer list state from top-of-image to the normal state. |
50 | | */ |
51 | 19.2k | { |
52 | 19.2k | my_main_ptr main_ptr = (my_main_ptr)cinfo->main; |
53 | 19.2k | int ci, i, rgroup; |
54 | 19.2k | int M = cinfo->_min_DCT_scaled_size; |
55 | 19.2k | jpeg_component_info *compptr; |
56 | 19.2k | JSAMPARRAY xbuf0, xbuf1; |
57 | | |
58 | 78.5k | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
59 | 59.2k | ci++, compptr++) { |
60 | 59.2k | rgroup = (compptr->v_samp_factor * compptr->_DCT_scaled_size) / |
61 | 59.2k | cinfo->_min_DCT_scaled_size; /* height of a row group of component */ |
62 | 59.2k | xbuf0 = main_ptr->xbuffer[0][ci]; |
63 | 59.2k | xbuf1 = main_ptr->xbuffer[1][ci]; |
64 | 189k | for (i = 0; i < rgroup; i++) { |
65 | 129k | xbuf0[i - rgroup] = xbuf0[rgroup * (M + 1) + i]; |
66 | 129k | xbuf1[i - rgroup] = xbuf1[rgroup * (M + 1) + i]; |
67 | 129k | xbuf0[rgroup * (M + 2) + i] = xbuf0[i]; |
68 | 129k | xbuf1[rgroup * (M + 2) + i] = xbuf1[i]; |
69 | 129k | } |
70 | 59.2k | } |
71 | 19.2k | } Unexecuted instantiation: jdapistd.c:set_wraparound_pointers jdmainct.c:set_wraparound_pointers Line | Count | Source | 51 | 19.2k | { | 52 | 19.2k | my_main_ptr main_ptr = (my_main_ptr)cinfo->main; | 53 | 19.2k | int ci, i, rgroup; | 54 | 19.2k | int M = cinfo->_min_DCT_scaled_size; | 55 | 19.2k | jpeg_component_info *compptr; | 56 | 19.2k | JSAMPARRAY xbuf0, xbuf1; | 57 | | | 58 | 78.5k | for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | 59 | 59.2k | ci++, compptr++) { | 60 | 59.2k | rgroup = (compptr->v_samp_factor * compptr->_DCT_scaled_size) / | 61 | 59.2k | cinfo->_min_DCT_scaled_size; /* height of a row group of component */ | 62 | 59.2k | xbuf0 = main_ptr->xbuffer[0][ci]; | 63 | 59.2k | xbuf1 = main_ptr->xbuffer[1][ci]; | 64 | 189k | for (i = 0; i < rgroup; i++) { | 65 | 129k | xbuf0[i - rgroup] = xbuf0[rgroup * (M + 1) + i]; | 66 | 129k | xbuf1[i - rgroup] = xbuf1[rgroup * (M + 1) + i]; | 67 | 129k | xbuf0[rgroup * (M + 2) + i] = xbuf0[i]; | 68 | 129k | xbuf1[rgroup * (M + 2) + i] = xbuf1[i]; | 69 | 129k | } | 70 | 59.2k | } | 71 | 19.2k | } |
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