ReactOS  0.4.14-dev-376-gaedba84
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  */
268  post->strip_height = (JDIMENSION) cinfo->max_v_samp_factor;
269  if (need_full_buffer) {
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 }
JDIMENSION output_height
Definition: jpeglib.h:508
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
struct jpeg_d_post_controller * post
Definition: jpeglib.h:681
struct jpeg_common_struct * j_common_ptr
Definition: jpeglib.h:284
boolean quantize_colors
Definition: jpeglib.h:491
JDIMENSION output_width
Definition: jpeglib.h:507
Definition: jpegint.h:180
JDIMENSION strip_height
Definition: jdpostct.c:36
boolean need_full_buffer
Definition: jpegint.h:377
struct jpeg_d_post_controller pub
Definition: jdpostct.c:27
#define SIZEOF(_ar)
Definition: calc.h:97
#define JPOOL_IMAGE
Definition: jpeglib.h:808
jround_up(long a, long b)
Definition: jutils.c:133
smooth NULL
Definition: ftsmooth.c:416
if(!(yy_init))
Definition: macro.lex.yy.c:714
JSAMPARRAY buffer
Definition: jdpostct.c:35
#define long
Definition: qsort.c:33
Definition: jdpostct.c:26
unsigned int JDIMENSION
Definition: jmorecfg.h:229
jvirt_sarray_ptr whole_image
Definition: jdpostct.c:34
my_post_controller * my_post_ptr
Definition: jdpostct.c:42

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
99  case JBUF_SAVE_AND_PASS:
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
#define ERREXIT(msg)
Definition: rdjpgcom.c:72
JDIMENSION strip_height
Definition: jdpostct.c:36
struct jpeg_d_post_controller pub
Definition: jdpostct.c:27
smooth NULL
Definition: ftsmooth.c:416
switch(r->id)
Definition: btrfs.c:2904
JDIMENSION next_row
Definition: jdpostct.c:39
JDIMENSION starting_row
Definition: jdpostct.c:38
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
JSAMPARRAY buffer
Definition: jdpostct.c:35
Definition: jdpostct.c:26
unsigned int JDIMENSION
Definition: jmorecfg.h:229
jvirt_sarray_ptr whole_image
Definition: jdpostct.c:34
my_post_controller * my_post_ptr
Definition: jdpostct.c:42

◆ 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 }
struct jpeg_d_post_controller * post
Definition: jpeglib.h:681
JDIMENSION strip_height
Definition: jdpostct.c:36
struct jpeg_color_quantizer * cquantize
Definition: jpeglib.h:688
if(!(yy_init))
Definition: macro.lex.yy.c:714
int JSAMPARRAY int int num_rows
Definition: jpegint.h:412
struct jpeg_upsampler * upsample
Definition: jpeglib.h:686
JSAMPARRAY buffer
Definition: jdpostct.c:35
Definition: jdpostct.c:26
jpeg_component_info JCOEFPTR JSAMPARRAY output_buf
Definition: jdct.h:238
unsigned int JDIMENSION
Definition: jmorecfg.h:229
my_post_controller * my_post_ptr
Definition: jdpostct.c:42