ReactOS 0.4.15-dev-5664-g3bf4ef6
jdpostct.c File Reference
#include "jinclude.h"
#include "jpeglib.h"
Include dependency graph for jdpostct.c:

Go to the source code of this file.

Classes

struct  my_post_controller
 

Macros

#define JPEG_INTERNALS
 

Typedefs

typedef my_post_controllermy_post_ptr
 

Functions

 METHODDEF (void)
 
 post_process_1pass (j_decompress_ptr cinfo, JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
 
 jinit_d_post_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
 

Macro Definition Documentation

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 19 of file jdpostct.c.

Typedef Documentation

◆ my_post_ptr

Definition at line 42 of file jdpostct.c.

Function Documentation

◆ jinit_d_post_controller()

jinit_d_post_controller ( j_decompress_ptr  cinfo,
boolean  need_full_buffer 
)

Definition at line 250 of file jdpostct.c.

251{
252 my_post_ptr post;
253
254 post = (my_post_ptr)
255 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 cinfo->post = (struct jpeg_d_post_controller *) post;
258 post->pub.start_pass = start_pass_dpost;
259 post->whole_image = NULL; /* flag for no virtual arrays */
260 post->buffer = NULL; /* flag for no strip buffer */
261
262 /* Create the quantization buffer, if needed */
263 if (cinfo->quantize_colors) {
264 /* The buffer strip height is max_v_samp_factor, which is typically
265 * an efficient number of rows for upsampling to return.
266 * (In the presence of output rescaling, we might want to be smarter?)
267 */
270 /* Two-pass color quantization: need full-image storage. */
271 /* We round up the number of rows to a multiple of the strip height. */
272#ifdef QUANT_2PASS_SUPPORTED
273 post->whole_image = (*cinfo->mem->request_virt_sarray)
274 ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
275 cinfo->output_width * cinfo->out_color_components,
276 (JDIMENSION) jround_up((long) cinfo->output_height,
277 (long) post->strip_height),
278 post->strip_height);
279#else
280 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
281#endif /* QUANT_2PASS_SUPPORTED */
282 } else {
283 /* One-pass color quantization: just make a strip buffer. */
284 post->buffer = (*cinfo->mem->alloc_sarray)
285 ((j_common_ptr) cinfo, JPOOL_IMAGE,
286 cinfo->output_width * cinfo->out_color_components,
287 post->strip_height);
288 }
289 }
290}
#define SIZEOF(_ar)
Definition: calc.h:97
#define NULL
Definition: types.h:112
#define FALSE
Definition: types.h:117
my_post_controller * my_post_ptr
Definition: jdpostct.c:42
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
if(dx< 0)
Definition: linetemp.h:194
#define long
Definition: qsort.c:33
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
Definition: jpegint.h:180
JDIMENSION output_height
Definition: jpeglib.h:508
boolean quantize_colors
Definition: jpeglib.h:491
JDIMENSION output_width
Definition: jpeglib.h:507
struct jpeg_d_post_controller * post
Definition: jpeglib.h:681
Definition: jdpostct.c:26
struct jpeg_d_post_controller pub
Definition: jdpostct.c:27
JDIMENSION strip_height
Definition: jdpostct.c:36
JSAMPARRAY buffer
Definition: jdpostct.c:35
jvirt_sarray_ptr whole_image
Definition: jdpostct.c:34

Referenced by master_selection().

◆ METHODDEF()

METHODDEF ( void  )

Definition at line 46 of file jdpostct.c.

74{
75 my_post_ptr post = (my_post_ptr) cinfo->post;
76
77 switch (pass_mode) {
78 case JBUF_PASS_THRU:
79 if (cinfo->quantize_colors) {
80 /* Single-pass processing with color quantization. */
81 post->pub.post_process_data = post_process_1pass;
82 /* We could be doing buffered-image output before starting a 2-pass
83 * color quantization; in that case, jinit_d_post_controller did not
84 * allocate a strip buffer. Use the virtual-array buffer as workspace.
85 */
86 if (post->buffer == NULL) {
87 post->buffer = (*cinfo->mem->access_virt_sarray)
88 ((j_common_ptr) cinfo, post->whole_image,
89 (JDIMENSION) 0, post->strip_height, TRUE);
90 }
91 } else {
92 /* For single-pass processing without color quantization,
93 * I have no work to do; just call the upsampler directly.
94 */
95 post->pub.post_process_data = cinfo->upsample->upsample;
96 }
97 break;
98#ifdef QUANT_2PASS_SUPPORTED
100 /* First pass of 2-pass quantization */
101 if (post->whole_image == NULL)
102 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
103 post->pub.post_process_data = post_process_prepass;
104 break;
105 case JBUF_CRANK_DEST:
106 /* Second pass of 2-pass quantization */
107 if (post->whole_image == NULL)
108 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
109 post->pub.post_process_data = post_process_2pass;
110 break;
111#endif /* QUANT_2PASS_SUPPORTED */
112 default:
113 ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
114 break;
115 }
116 post->starting_row = post->next_row = 0;
117}
#define TRUE
Definition: types.h:120
switch(r->id)
Definition: btrfs.c:3046
post_process_1pass(j_decompress_ptr cinfo, JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr, JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail)
Definition: jdpostct.c:126
@ JBUF_PASS_THRU
Definition: jpegint.h:18
@ JBUF_SAVE_AND_PASS
Definition: jpegint.h:22
@ JBUF_CRANK_DEST
Definition: jpegint.h:21
JDIMENSION starting_row
Definition: jdpostct.c:38
JDIMENSION next_row
Definition: jdpostct.c:39

◆ post_process_1pass()

post_process_1pass ( j_decompress_ptr  cinfo,
JSAMPIMAGE  input_buf,
JDIMENSION in_row_group_ctr,
JDIMENSION  in_row_groups_avail,
JSAMPARRAY  output_buf,
JDIMENSION out_row_ctr,
JDIMENSION  out_rows_avail 
)

Definition at line 126 of file jdpostct.c.

131{
132 my_post_ptr post = (my_post_ptr) cinfo->post;
133 JDIMENSION num_rows, max_rows;
134
135 /* Fill the buffer, but not more than what we can dump out in one go. */
136 /* Note we rely on the upsampler to detect bottom of image. */
137 max_rows = out_rows_avail - *out_row_ctr;
138 if (max_rows > post->strip_height)
139 max_rows = post->strip_height;
140 num_rows = 0;
141 (*cinfo->upsample->upsample) (cinfo,
142 input_buf, in_row_group_ctr, in_row_groups_avail,
143 post->buffer, &num_rows, max_rows);
144 /* Quantize and emit data. */
145 (*cinfo->cquantize->color_quantize) (cinfo,
146 post->buffer, output_buf + *out_row_ctr, (int) num_rows);
147 *out_row_ctr += num_rows;
148}
jpeg_component_info JCOEFPTR JSAMPARRAY output_buf
Definition: jdct.h:239
int JSAMPARRAY int int num_rows
Definition: jpegint.h:421
struct jpeg_upsampler * upsample
Definition: jpeglib.h:686
struct jpeg_color_quantizer * cquantize
Definition: jpeglib.h:688