1 #if !defined(_FX_JPEG_TURBO_)
2 /*
3 * jdmaster.c
4 *
5 * Copyright (C) 1991-1997, Thomas G. Lane.
6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file.
8 *
9 * This file contains master control logic for the JPEG decompressor.
10 * These routines are concerned with selecting the modules to be executed
11 * and with determining the number of passes and the work to be done in each
12 * pass.
13 */
14
15 #define JPEG_INTERNALS
16 #include "jinclude.h"
17 #include "jpeglib.h"
18
19
20 /* Private state */
21
22 typedef struct {
23 struct jpeg_decomp_master pub; /* public fields */
24
25 int pass_number; /* # of passes completed */
26
27 boolean using_merged_upsample; /* TRUE if using merged upsample/cconvert */
28
29 /* Saved references to initialized quantizer modules,
30 * in case we need to switch modes.
31 */
32 struct jpeg_color_quantizer * quantizer_1pass;
33 struct jpeg_color_quantizer * quantizer_2pass;
34 } my_decomp_master;
35
36 typedef my_decomp_master * my_master_ptr;
37
38
39 /*
40 * Determine whether merged upsample/color conversion should be used.
41 * CRUCIAL: this must match the actual capabilities of jdmerge.c!
42 */
43
44 LOCAL(boolean)
use_merged_upsample(j_decompress_ptr cinfo)45 use_merged_upsample (j_decompress_ptr cinfo)
46 {
47 #ifdef UPSAMPLE_MERGING_SUPPORTED
48 /* Merging is the equivalent of plain box-filter upsampling */
49 if (cinfo->do_fancy_upsampling || cinfo->CCIR601_sampling)
50 return FALSE;
51 /* jdmerge.c only supports YCC=>RGB color conversion */
52 if (cinfo->jpeg_color_space != JCS_YCbCr || cinfo->num_components != 3 ||
53 cinfo->out_color_space != JCS_RGB ||
54 cinfo->out_color_components != RGB_PIXELSIZE)
55 return FALSE;
56 /* and it only handles 2h1v or 2h2v sampling ratios */
57 if (cinfo->comp_info[0].h_samp_factor != 2 ||
58 cinfo->comp_info[1].h_samp_factor != 1 ||
59 cinfo->comp_info[2].h_samp_factor != 1 ||
60 cinfo->comp_info[0].v_samp_factor > 2 ||
61 cinfo->comp_info[1].v_samp_factor != 1 ||
62 cinfo->comp_info[2].v_samp_factor != 1)
63 return FALSE;
64 /* furthermore, it doesn't work if we've scaled the IDCTs differently */
65 if (cinfo->comp_info[0].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
66 cinfo->comp_info[1].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
67 cinfo->comp_info[2].DCT_scaled_size != cinfo->min_DCT_scaled_size)
68 return FALSE;
69 /* ??? also need to test for upsample-time rescaling, when & if supported */
70 return TRUE; /* by golly, it'll work... */
71 #else
72 return FALSE;
73 #endif
74 }
75
76
77 /*
78 * Compute output image dimensions and related values.
79 * NOTE: this is exported for possible use by application.
80 * Hence it mustn't do anything that can't be done twice.
81 * Also note that it may be called before the master module is initialized!
82 */
83
84 GLOBAL(void)
jpeg_calc_output_dimensions(j_decompress_ptr cinfo)85 jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
86 /* Do computations that are needed before master selection phase */
87 {
88 #ifdef IDCT_SCALING_SUPPORTED
89 int ci;
90 jpeg_component_info *compptr;
91 #endif
92
93 /* Prevent application from calling me at wrong times */
94 if (cinfo->global_state != DSTATE_READY)
95 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
96
97 #ifdef IDCT_SCALING_SUPPORTED
98
99 /* Compute actual output image dimensions and DCT scaling choices. */
100 if (cinfo->scale_num * 8 <= cinfo->scale_denom) {
101 /* Provide 1/8 scaling */
102 cinfo->output_width = (JDIMENSION)
103 jdiv_round_up((long) cinfo->image_width, 8L);
104 cinfo->output_height = (JDIMENSION)
105 jdiv_round_up((long) cinfo->image_height, 8L);
106 cinfo->min_DCT_scaled_size = 1;
107 } else if (cinfo->scale_num * 4 <= cinfo->scale_denom) {
108 /* Provide 1/4 scaling */
109 cinfo->output_width = (JDIMENSION)
110 jdiv_round_up((long) cinfo->image_width, 4L);
111 cinfo->output_height = (JDIMENSION)
112 jdiv_round_up((long) cinfo->image_height, 4L);
113 cinfo->min_DCT_scaled_size = 2;
114 } else if (cinfo->scale_num * 2 <= cinfo->scale_denom) {
115 /* Provide 1/2 scaling */
116 cinfo->output_width = (JDIMENSION)
117 jdiv_round_up((long) cinfo->image_width, 2L);
118 cinfo->output_height = (JDIMENSION)
119 jdiv_round_up((long) cinfo->image_height, 2L);
120 cinfo->min_DCT_scaled_size = 4;
121 } else {
122 /* Provide 1/1 scaling */
123 cinfo->output_width = cinfo->image_width;
124 cinfo->output_height = cinfo->image_height;
125 cinfo->min_DCT_scaled_size = DCTSIZE;
126 }
127 /* In selecting the actual DCT scaling for each component, we try to
128 * scale up the chroma components via IDCT scaling rather than upsampling.
129 * This saves time if the upsampler gets to use 1:1 scaling.
130 * Note this code assumes that the supported DCT scalings are powers of 2.
131 */
132 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
133 ci++, compptr++) {
134 int ssize = cinfo->min_DCT_scaled_size;
135 while (ssize < DCTSIZE &&
136 (compptr->h_samp_factor * ssize * 2 <=
137 cinfo->max_h_samp_factor * cinfo->min_DCT_scaled_size) &&
138 (compptr->v_samp_factor * ssize * 2 <=
139 cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size)) {
140 ssize = ssize * 2;
141 }
142 compptr->DCT_scaled_size = ssize;
143 }
144
145 /* Recompute downsampled dimensions of components;
146 * application needs to know these if using raw downsampled data.
147 */
148 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
149 ci++, compptr++) {
150 /* Size in samples, after IDCT scaling */
151 compptr->downsampled_width = (JDIMENSION)
152 jdiv_round_up((long) cinfo->image_width *
153 (long) (compptr->h_samp_factor * compptr->DCT_scaled_size),
154 (long) (cinfo->max_h_samp_factor * DCTSIZE));
155 compptr->downsampled_height = (JDIMENSION)
156 jdiv_round_up((long) cinfo->image_height *
157 (long) (compptr->v_samp_factor * compptr->DCT_scaled_size),
158 (long) (cinfo->max_v_samp_factor * DCTSIZE));
159 }
160
161 #else /* !IDCT_SCALING_SUPPORTED */
162
163 /* Hardwire it to "no scaling" */
164 cinfo->output_width = cinfo->image_width;
165 cinfo->output_height = cinfo->image_height;
166 /* jdinput.c has already initialized DCT_scaled_size to DCTSIZE,
167 * and has computed unscaled downsampled_width and downsampled_height.
168 */
169
170 #endif /* IDCT_SCALING_SUPPORTED */
171
172 /* Report number of components in selected colorspace. */
173 /* Probably this should be in the color conversion module... */
174 switch (cinfo->out_color_space) {
175 case JCS_GRAYSCALE:
176 cinfo->out_color_components = 1;
177 break;
178 case JCS_RGB:
179 #if RGB_PIXELSIZE != 3
180 cinfo->out_color_components = RGB_PIXELSIZE;
181 break;
182 #endif /* else share code with YCbCr */
183 case JCS_YCbCr:
184 cinfo->out_color_components = 3;
185 break;
186 case JCS_CMYK:
187 case JCS_YCCK:
188 cinfo->out_color_components = 4;
189 break;
190 default: /* else must be same colorspace as in file */
191 cinfo->out_color_components = cinfo->num_components;
192 break;
193 }
194 cinfo->output_components = (cinfo->quantize_colors ? 1 :
195 cinfo->out_color_components);
196
197 /* See if upsampler will want to emit more than one row at a time */
198 if (use_merged_upsample(cinfo))
199 cinfo->rec_outbuf_height = cinfo->max_v_samp_factor;
200 else
201 cinfo->rec_outbuf_height = 1;
202 }
203
204
205 /*
206 * Several decompression processes need to range-limit values to the range
207 * 0..MAXJSAMPLE; the input value may fall somewhat outside this range
208 * due to noise introduced by quantization, roundoff error, etc. These
209 * processes are inner loops and need to be as fast as possible. On most
210 * machines, particularly CPUs with pipelines or instruction prefetch,
211 * a (subscript-check-less) C table lookup
212 * x = sample_range_limit[x];
213 * is faster than explicit tests
214 * if (x < 0) x = 0;
215 * else if (x > MAXJSAMPLE) x = MAXJSAMPLE;
216 * These processes all use a common table prepared by the routine below.
217 *
218 * For most steps we can mathematically guarantee that the initial value
219 * of x is within MAXJSAMPLE+1 of the legal range, so a table running from
220 * -(MAXJSAMPLE+1) to 2*MAXJSAMPLE+1 is sufficient. But for the initial
221 * limiting step (just after the IDCT), a wildly out-of-range value is
222 * possible if the input data is corrupt. To avoid any chance of indexing
223 * off the end of memory and getting a bad-pointer trap, we perform the
224 * post-IDCT limiting thus:
225 * x = range_limit[x & MASK];
226 * where MASK is 2 bits wider than legal sample data, ie 10 bits for 8-bit
227 * samples. Under normal circumstances this is more than enough range and
228 * a correct output will be generated; with bogus input data the mask will
229 * cause wraparound, and we will safely generate a bogus-but-in-range output.
230 * For the post-IDCT step, we want to convert the data from signed to unsigned
231 * representation by adding CENTERJSAMPLE at the same time that we limit it.
232 * So the post-IDCT limiting table ends up looking like this:
233 * CENTERJSAMPLE,CENTERJSAMPLE+1,...,MAXJSAMPLE,
234 * MAXJSAMPLE (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
235 * 0 (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
236 * 0,1,...,CENTERJSAMPLE-1
237 * Negative inputs select values from the upper half of the table after
238 * masking.
239 *
240 * We can save some space by overlapping the start of the post-IDCT table
241 * with the simpler range limiting table. The post-IDCT table begins at
242 * sample_range_limit + CENTERJSAMPLE.
243 *
244 * Note that the table is allocated in near data space on PCs; it's small
245 * enough and used often enough to justify this.
246 */
247
248 LOCAL(void)
prepare_range_limit_table(j_decompress_ptr cinfo)249 prepare_range_limit_table (j_decompress_ptr cinfo)
250 /* Allocate and fill in the sample_range_limit table */
251 {
252 JSAMPLE * table;
253 int i;
254
255 table = (JSAMPLE *)
256 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
257 (5 * (MAXJSAMPLE+1) + CENTERJSAMPLE) * SIZEOF(JSAMPLE));
258 table += (MAXJSAMPLE+1); /* allow negative subscripts of simple table */
259 cinfo->sample_range_limit = table;
260 /* First segment of "simple" table: limit[x] = 0 for x < 0 */
261 MEMZERO(table - (MAXJSAMPLE+1), (MAXJSAMPLE+1) * SIZEOF(JSAMPLE));
262 /* Main part of "simple" table: limit[x] = x */
263 for (i = 0; i <= MAXJSAMPLE; i++)
264 table[i] = (JSAMPLE) i;
265 table += CENTERJSAMPLE; /* Point to where post-IDCT table starts */
266 /* End of simple table, rest of first half of post-IDCT table */
267 for (i = CENTERJSAMPLE; i < 2*(MAXJSAMPLE+1); i++)
268 table[i] = MAXJSAMPLE;
269 /* Second half of post-IDCT table */
270 MEMZERO(table + (2 * (MAXJSAMPLE+1)),
271 (2 * (MAXJSAMPLE+1) - CENTERJSAMPLE) * SIZEOF(JSAMPLE));
272 MEMCOPY(table + (4 * (MAXJSAMPLE+1) - CENTERJSAMPLE),
273 cinfo->sample_range_limit, CENTERJSAMPLE * SIZEOF(JSAMPLE));
274 }
275
276
277 /*
278 * Master selection of decompression modules.
279 * This is done once at jpeg_start_decompress time. We determine
280 * which modules will be used and give them appropriate initialization calls.
281 * We also initialize the decompressor input side to begin consuming data.
282 *
283 * Since jpeg_read_header has finished, we know what is in the SOF
284 * and (first) SOS markers. We also have all the application parameter
285 * settings.
286 */
287
288 LOCAL(void)
master_selection(j_decompress_ptr cinfo)289 master_selection (j_decompress_ptr cinfo)
290 {
291 my_master_ptr master = (my_master_ptr) cinfo->master;
292 boolean use_c_buffer;
293 long samplesperrow;
294 JDIMENSION jd_samplesperrow;
295
296 /* Initialize dimensions and other stuff */
297 jpeg_calc_output_dimensions(cinfo);
298 prepare_range_limit_table(cinfo);
299
300 /* Width of an output scanline must be representable as JDIMENSION. */
301 samplesperrow = (long) cinfo->output_width * (long) cinfo->out_color_components;
302 jd_samplesperrow = (JDIMENSION) samplesperrow;
303 if ((long) jd_samplesperrow != samplesperrow)
304 ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
305
306 /* Initialize my private state */
307 master->pass_number = 0;
308 master->using_merged_upsample = use_merged_upsample(cinfo);
309
310 /* Color quantizer selection */
311 master->quantizer_1pass = NULL;
312 master->quantizer_2pass = NULL;
313 /* No mode changes if not using buffered-image mode. */
314 if (! cinfo->quantize_colors || ! cinfo->buffered_image) {
315 cinfo->enable_1pass_quant = FALSE;
316 cinfo->enable_external_quant = FALSE;
317 cinfo->enable_2pass_quant = FALSE;
318 }
319 if (cinfo->quantize_colors) {
320 if (cinfo->raw_data_out)
321 ERREXIT(cinfo, JERR_NOTIMPL);
322 /* 2-pass quantizer only works in 3-component color space. */
323 if (cinfo->out_color_components != 3) {
324 cinfo->enable_1pass_quant = TRUE;
325 cinfo->enable_external_quant = FALSE;
326 cinfo->enable_2pass_quant = FALSE;
327 cinfo->colormap = NULL;
328 } else if (cinfo->colormap != NULL) {
329 cinfo->enable_external_quant = TRUE;
330 } else if (cinfo->two_pass_quantize) {
331 cinfo->enable_2pass_quant = TRUE;
332 } else {
333 cinfo->enable_1pass_quant = TRUE;
334 }
335
336 if (cinfo->enable_1pass_quant) {
337 #ifdef QUANT_1PASS_SUPPORTED
338 jinit_1pass_quantizer(cinfo);
339 master->quantizer_1pass = cinfo->cquantize;
340 #else
341 ERREXIT(cinfo, JERR_NOT_COMPILED);
342 #endif
343 }
344
345 /* We use the 2-pass code to map to external colormaps. */
346 if (cinfo->enable_2pass_quant || cinfo->enable_external_quant) {
347 #ifdef QUANT_2PASS_SUPPORTED
348 jinit_2pass_quantizer(cinfo);
349 master->quantizer_2pass = cinfo->cquantize;
350 #else
351 ERREXIT(cinfo, JERR_NOT_COMPILED);
352 #endif
353 }
354 /* If both quantizers are initialized, the 2-pass one is left active;
355 * this is necessary for starting with quantization to an external map.
356 */
357 }
358
359 /* Post-processing: in particular, color conversion first */
360 if (! cinfo->raw_data_out) {
361 if (master->using_merged_upsample) {
362 #ifdef UPSAMPLE_MERGING_SUPPORTED
363 jinit_merged_upsampler(cinfo); /* does color conversion too */
364 #else
365 ERREXIT(cinfo, JERR_NOT_COMPILED);
366 #endif
367 } else {
368 jinit_color_deconverter(cinfo);
369 jinit_upsampler(cinfo);
370 }
371 jinit_d_post_controller(cinfo, cinfo->enable_2pass_quant);
372 }
373 /* Inverse DCT */
374 jinit_inverse_dct(cinfo);
375 /* Entropy decoding: either Huffman or arithmetic coding. */
376 if (cinfo->arith_code) {
377 ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
378 } else {
379 if (cinfo->progressive_mode) {
380 #ifdef D_PROGRESSIVE_SUPPORTED
381 jinit_phuff_decoder(cinfo);
382 #else
383 ERREXIT(cinfo, JERR_NOT_COMPILED);
384 #endif
385 } else
386 jinit_huff_decoder(cinfo);
387 }
388
389 /* Initialize principal buffer controllers. */
390 use_c_buffer = cinfo->inputctl->has_multiple_scans || cinfo->buffered_image;
391 jinit_d_coef_controller(cinfo, use_c_buffer);
392
393 if (! cinfo->raw_data_out)
394 jinit_d_main_controller(cinfo, FALSE /* never need full buffer here */);
395
396 /* We can now tell the memory manager to allocate virtual arrays. */
397 (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
398
399 /* Initialize input side of decompressor to consume first scan. */
400 (*cinfo->inputctl->start_input_pass) (cinfo);
401
402 #ifdef D_MULTISCAN_FILES_SUPPORTED
403 /* If jpeg_start_decompress will read the whole file, initialize
404 * progress monitoring appropriately. The input step is counted
405 * as one pass.
406 */
407 if (cinfo->progress != NULL && ! cinfo->buffered_image &&
408 cinfo->inputctl->has_multiple_scans) {
409 int nscans;
410 /* Estimate number of scans to set pass_limit. */
411 if (cinfo->progressive_mode) {
412 /* Arbitrarily estimate 2 interleaved DC scans + 3 AC scans/component. */
413 nscans = 2 + 3 * cinfo->num_components;
414 } else {
415 /* For a nonprogressive multiscan file, estimate 1 scan per component. */
416 nscans = cinfo->num_components;
417 }
418 cinfo->progress->pass_counter = 0L;
419 cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows * nscans;
420 cinfo->progress->completed_passes = 0;
421 cinfo->progress->total_passes = (cinfo->enable_2pass_quant ? 3 : 2);
422 /* Count the input pass as done */
423 master->pass_number++;
424 }
425 #endif /* D_MULTISCAN_FILES_SUPPORTED */
426 }
427
428
429 /*
430 * Per-pass setup.
431 * This is called at the beginning of each output pass. We determine which
432 * modules will be active during this pass and give them appropriate
433 * start_pass calls. We also set is_dummy_pass to indicate whether this
434 * is a "real" output pass or a dummy pass for color quantization.
435 * (In the latter case, jdapistd.c will crank the pass to completion.)
436 */
437
438 METHODDEF(void)
prepare_for_output_pass(j_decompress_ptr cinfo)439 prepare_for_output_pass (j_decompress_ptr cinfo)
440 {
441 my_master_ptr master = (my_master_ptr) cinfo->master;
442
443 if (master->pub.is_dummy_pass) {
444 #ifdef QUANT_2PASS_SUPPORTED
445 /* Final pass of 2-pass quantization */
446 master->pub.is_dummy_pass = FALSE;
447 (*cinfo->cquantize->start_pass) (cinfo, FALSE);
448 (*cinfo->post->start_pass) (cinfo, JBUF_CRANK_DEST);
449 (*cinfo->main->start_pass) (cinfo, JBUF_CRANK_DEST);
450 #else
451 ERREXIT(cinfo, JERR_NOT_COMPILED);
452 #endif /* QUANT_2PASS_SUPPORTED */
453 } else {
454 if (cinfo->quantize_colors && cinfo->colormap == NULL) {
455 /* Select new quantization method */
456 if (cinfo->two_pass_quantize && cinfo->enable_2pass_quant) {
457 cinfo->cquantize = master->quantizer_2pass;
458 master->pub.is_dummy_pass = TRUE;
459 } else if (cinfo->enable_1pass_quant) {
460 cinfo->cquantize = master->quantizer_1pass;
461 } else {
462 ERREXIT(cinfo, JERR_MODE_CHANGE);
463 }
464 }
465 (*cinfo->idct->start_pass) (cinfo);
466 (*cinfo->coef->start_output_pass) (cinfo);
467 if (! cinfo->raw_data_out) {
468 if (! master->using_merged_upsample)
469 (*cinfo->cconvert->start_pass) (cinfo);
470 (*cinfo->upsample->start_pass) (cinfo);
471 if (cinfo->quantize_colors)
472 (*cinfo->cquantize->start_pass) (cinfo, master->pub.is_dummy_pass);
473 (*cinfo->post->start_pass) (cinfo,
474 (master->pub.is_dummy_pass ? JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
475 (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
476 }
477 }
478
479 /* Set up progress monitor's pass info if present */
480 if (cinfo->progress != NULL) {
481 cinfo->progress->completed_passes = master->pass_number;
482 cinfo->progress->total_passes = master->pass_number +
483 (master->pub.is_dummy_pass ? 2 : 1);
484 /* In buffered-image mode, we assume one more output pass if EOI not
485 * yet reached, but no more passes if EOI has been reached.
486 */
487 if (cinfo->buffered_image && ! cinfo->inputctl->eoi_reached) {
488 cinfo->progress->total_passes += (cinfo->enable_2pass_quant ? 2 : 1);
489 }
490 }
491 }
492
493
494 /*
495 * Finish up at end of an output pass.
496 */
497
498 METHODDEF(void)
finish_output_pass(j_decompress_ptr cinfo)499 finish_output_pass (j_decompress_ptr cinfo)
500 {
501 my_master_ptr master = (my_master_ptr) cinfo->master;
502
503 if (cinfo->quantize_colors)
504 (*cinfo->cquantize->finish_pass) (cinfo);
505 master->pass_number++;
506 }
507
508
509 #ifdef D_MULTISCAN_FILES_SUPPORTED
510
511 /*
512 * Switch to a new external colormap between output passes.
513 */
514
515 GLOBAL(void)
jpeg_new_colormap(j_decompress_ptr cinfo)516 jpeg_new_colormap (j_decompress_ptr cinfo)
517 {
518 my_master_ptr master = (my_master_ptr) cinfo->master;
519
520 /* Prevent application from calling me at wrong times */
521 if (cinfo->global_state != DSTATE_BUFIMAGE)
522 ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
523
524 if (cinfo->quantize_colors && cinfo->enable_external_quant &&
525 cinfo->colormap != NULL) {
526 /* Select 2-pass quantizer for external colormap use */
527 cinfo->cquantize = master->quantizer_2pass;
528 /* Notify quantizer of colormap change */
529 (*cinfo->cquantize->new_color_map) (cinfo);
530 master->pub.is_dummy_pass = FALSE; /* just in case */
531 } else
532 ERREXIT(cinfo, JERR_MODE_CHANGE);
533 }
534
535 #endif /* D_MULTISCAN_FILES_SUPPORTED */
536
537
538 /*
539 * Initialize master decompression control and select active modules.
540 * This is performed at the start of jpeg_start_decompress.
541 */
542
543 GLOBAL(void)
jinit_master_decompress(j_decompress_ptr cinfo)544 jinit_master_decompress (j_decompress_ptr cinfo)
545 {
546 my_master_ptr master;
547
548 master = (my_master_ptr)
549 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
550 SIZEOF(my_decomp_master));
551 cinfo->master = (struct jpeg_decomp_master *) master;
552 master->pub.prepare_for_output_pass = prepare_for_output_pass;
553 master->pub.finish_output_pass = finish_output_pass;
554
555 master->pub.is_dummy_pass = FALSE;
556
557 master_selection(cinfo);
558 }
559
560 #endif //_FX_JPEG_TURBO_
561