ReactOS 0.4.15-dev-7659-ga55345b
jcmainct.c File Reference
#include "jinclude.h"
#include "jpeglib.h"
Include dependency graph for jcmainct.c:

Go to the source code of this file.

Classes

struct  my_main_controller
 

Macros

#define JPEG_INTERNALS
 

Typedefs

typedef my_main_controllermy_main_ptr
 

Functions

 METHODDEF (void)
 
 process_data_simple_main (j_compress_ptr cinfo, JSAMPARRAY input_buf, JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail)
 
 jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
 

Macro Definition Documentation

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 14 of file jcmainct.c.

Typedef Documentation

◆ my_main_ptr

Definition at line 51 of file jcmainct.c.

Function Documentation

◆ jinit_c_main_controller()

jinit_c_main_controller ( j_compress_ptr  cinfo,
boolean  need_full_buffer 
)

Definition at line 248 of file jcmainct.c.

249{
250 my_main_ptr mainp;
251 int ci;
253
254 mainp = (my_main_ptr)
255 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 cinfo->main = &mainp->pub;
258 mainp->pub.start_pass = start_pass_main;
259
260 /* We don't need to create a buffer in raw-data mode. */
261 if (cinfo->raw_data_in)
262 return;
263
264 /* Create the buffer. It holds downsampled data, so each component
265 * may be of a different size.
266 */
267 if (need_full_buffer) {
268#ifdef FULL_MAIN_BUFFER_SUPPORTED
269 /* Allocate a full-image virtual array for each component */
270 /* Note we pad the bottom to a multiple of the iMCU height */
271 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
272 ci++, compptr++) {
273 mainp->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
274 ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
280 }
281#else
282 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
283#endif
284 } else {
285#ifdef FULL_MAIN_BUFFER_SUPPORTED
286 mainp->whole_image[0] = NULL; /* flag for no virtual arrays */
287#endif
288 /* Allocate a strip buffer for each component */
289 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
290 ci++, compptr++) {
291 mainp->buffer[ci] = (*cinfo->mem->alloc_sarray)
292 ((j_common_ptr) cinfo, JPOOL_IMAGE,
295 }
296 }
297}
#define SIZEOF(_ar)
Definition: calc.h:97
#define NULL
Definition: types.h:112
#define FALSE
Definition: types.h:117
my_main_controller * my_main_ptr
Definition: jcmainct.c:51
jpeg_component_info * compptr
Definition: jdct.h:238
start_pass_main(j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
Definition: jdmainct.c:309
unsigned int JDIMENSION
Definition: jmorecfg.h:229
boolean need_full_buffer
Definition: jpegint.h:384
struct jpeg_common_struct * j_common_ptr
Definition: jpeglib.h:284
#define JPOOL_IMAGE
Definition: jpeglib.h:808
jround_up(long a, long b)
Definition: jutils.c:133
#define long
Definition: qsort.c:33
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
JDIMENSION width_in_blocks
Definition: jpeglib.h:148
JDIMENSION height_in_blocks
Definition: jpeglib.h:149
jpeg_component_info * comp_info
Definition: jpeglib.h:333
boolean raw_data_in
Definition: jpeglib.h:357
struct jpeg_c_main_controller * main
Definition: jpeglib.h:444
JSAMPARRAY buffer[MAX_COMPONENTS]
Definition: jcmainct.c:41
struct jpeg_c_main_controller pub
Definition: jcmainct.c:30

Referenced by jinit_compress_master().

◆ METHODDEF()

METHODDEF ( void  )

Definition at line 55 of file jcmainct.c.

71{
72 my_main_ptr mainp = (my_main_ptr) cinfo->main;
73
74 /* Do nothing in raw-data mode. */
75 if (cinfo->raw_data_in)
76 return;
77
78 mainp->cur_iMCU_row = 0; /* initialize counters */
79 mainp->rowgroup_ctr = 0;
80 mainp->suspended = FALSE;
81 mainp->pass_mode = pass_mode; /* save mode for use by process_data */
82
83 switch (pass_mode) {
84 case JBUF_PASS_THRU:
85#ifdef FULL_MAIN_BUFFER_SUPPORTED
86 if (mainp->whole_image[0] != NULL)
87 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
88#endif
89 mainp->pub.process_data = process_data_simple_main;
90 break;
91#ifdef FULL_MAIN_BUFFER_SUPPORTED
93 case JBUF_CRANK_DEST:
95 if (mainp->whole_image[0] == NULL)
96 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
97 mainp->pub.process_data = process_data_buffer_main;
98 break;
99#endif
100 default:
101 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
102 break;
103 }
104}
process_data_simple_main(j_compress_ptr cinfo, JSAMPARRAY input_buf, JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail)
Definition: jcmainct.c:114
@ JBUF_SAVE_SOURCE
Definition: jpegint.h:20
@ JBUF_PASS_THRU
Definition: jpegint.h:18
@ JBUF_SAVE_AND_PASS
Definition: jpegint.h:22
@ JBUF_CRANK_DEST
Definition: jpegint.h:21
if(dx< 0)
Definition: linetemp.h:194
JDIMENSION cur_iMCU_row
Definition: jcmainct.c:32
J_BUF_MODE pass_mode
Definition: jcmainct.c:35
JDIMENSION rowgroup_ctr
Definition: jcmainct.c:33
boolean suspended
Definition: jcmainct.c:34

◆ process_data_simple_main()

process_data_simple_main ( j_compress_ptr  cinfo,
JSAMPARRAY  input_buf,
JDIMENSION in_row_ctr,
JDIMENSION  in_rows_avail 
)

Definition at line 114 of file jcmainct.c.

117{
118 my_main_ptr mainp = (my_main_ptr) cinfo->main;
119
120 while (mainp->cur_iMCU_row < cinfo->total_iMCU_rows) {
121 /* Read input data if we haven't filled the main buffer yet */
122 if (mainp->rowgroup_ctr < (JDIMENSION) cinfo->min_DCT_v_scaled_size)
123 (*cinfo->prep->pre_process_data) (cinfo,
124 input_buf, in_row_ctr, in_rows_avail,
125 mainp->buffer, &mainp->rowgroup_ctr,
127
128 /* If we don't have a full iMCU row buffered, return to application for
129 * more data. Note that preprocessor will always pad to fill the iMCU row
130 * at the bottom of the image.
131 */
132 if (mainp->rowgroup_ctr != (JDIMENSION) cinfo->min_DCT_v_scaled_size)
133 return;
134
135 /* Send the completed row to the compressor */
136 if (! (*cinfo->coef->compress_data) (cinfo, mainp->buffer)) {
137 /* If compressor did not consume the whole row, then we must need to
138 * suspend processing and return to the application. In this situation
139 * we pretend we didn't yet consume the last input row; otherwise, if
140 * it happened to be the last row of the image, the application would
141 * think we were done.
142 */
143 if (! mainp->suspended) {
144 (*in_row_ctr)--;
145 mainp->suspended = TRUE;
146 }
147 return;
148 }
149 /* We did finish the row. Undo our little suspension hack if a previous
150 * call suspended; then mark the main buffer empty.
151 */
152 if (mainp->suspended) {
153 (*in_row_ctr)++;
154 mainp->suspended = FALSE;
155 }
156 mainp->rowgroup_ctr = 0;
157 mainp->cur_iMCU_row++;
158 }
159}
while(CdLookupNextInitialFileDirent(IrpContext, Fcb, FileContext))
#define TRUE
Definition: types.h:120
struct jpeg_c_prep_controller * prep
Definition: jpeglib.h:445
struct jpeg_c_coef_controller * coef
Definition: jpeglib.h:446
JDIMENSION total_iMCU_rows
Definition: jpeglib.h:411