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1 /* | 1 /* |
2 * jcmaster.c | 2 * jcmaster.c |
3 * | 3 * |
4 * Copyright (C) 1991-1997, Thomas G. Lane. | 4 * Copyright (C) 1991-1997, Thomas G. Lane. |
| 5 * Modified 2003-2010 by Guido Vollbeding. |
| 6 * Copyright (C) 2010, D. R. Commander. |
5 * This file is part of the Independent JPEG Group's software. | 7 * This file is part of the Independent JPEG Group's software. |
6 * For conditions of distribution and use, see the accompanying README file. | 8 * For conditions of distribution and use, see the accompanying README file. |
7 * | 9 * |
8 * This file contains master control logic for the JPEG compressor. | 10 * This file contains master control logic for the JPEG compressor. |
9 * These routines are concerned with parameter validation, initial setup, | 11 * These routines are concerned with parameter validation, initial setup, |
10 * and inter-pass control (determining the number of passes and the work | 12 * and inter-pass control (determining the number of passes and the work |
11 * to be done in each pass). | 13 * to be done in each pass). |
12 */ | 14 */ |
13 | 15 |
14 #define JPEG_INTERNALS | 16 #define JPEG_INTERNALS |
15 #include "jinclude.h" | 17 #include "jinclude.h" |
16 #include "jpeglib.h" | 18 #include "jpeglib.h" |
| 19 #include "jpegcomp.h" |
17 | 20 |
18 | 21 |
19 /* Private state */ | 22 /* Private state */ |
20 | 23 |
21 typedef enum { | 24 typedef enum { |
22 main_pass, /* input data, also do first output step */ | 25 main_pass, /* input data, also do first output step */ |
23 huff_opt_pass, /* Huffman code optimization pass */ | 26 huff_opt_pass, /* Huffman code optimization pass */ |
24 output_pass /* data output pass */ | 27 output_pass /* data output pass */ |
25 } c_pass_type; | 28 } c_pass_type; |
26 | 29 |
27 typedef struct { | 30 typedef struct { |
28 struct jpeg_comp_master pub; /* public fields */ | 31 struct jpeg_comp_master pub; /* public fields */ |
29 | 32 |
30 c_pass_type pass_type; /* the type of the current pass */ | 33 c_pass_type pass_type; /* the type of the current pass */ |
31 | 34 |
32 int pass_number; /* # of passes completed */ | 35 int pass_number; /* # of passes completed */ |
33 int total_passes; /* total # of passes needed */ | 36 int total_passes; /* total # of passes needed */ |
34 | 37 |
35 int scan_number; /* current index in scan_info[] */ | 38 int scan_number; /* current index in scan_info[] */ |
36 } my_comp_master; | 39 } my_comp_master; |
37 | 40 |
38 typedef my_comp_master * my_master_ptr; | 41 typedef my_comp_master * my_master_ptr; |
39 | 42 |
40 | 43 |
41 /* | 44 /* |
42 * Support routines that do various essential calculations. | 45 * Support routines that do various essential calculations. |
43 */ | 46 */ |
44 | 47 |
| 48 #if JPEG_LIB_VERSION >= 70 |
| 49 /* |
| 50 * Compute JPEG image dimensions and related values. |
| 51 * NOTE: this is exported for possible use by application. |
| 52 * Hence it mustn't do anything that can't be done twice. |
| 53 */ |
| 54 |
| 55 GLOBAL(void) |
| 56 jpeg_calc_jpeg_dimensions (j_compress_ptr cinfo) |
| 57 /* Do computations that are needed before master selection phase */ |
| 58 { |
| 59 /* Hardwire it to "no scaling" */ |
| 60 cinfo->jpeg_width = cinfo->image_width; |
| 61 cinfo->jpeg_height = cinfo->image_height; |
| 62 cinfo->min_DCT_h_scaled_size = DCTSIZE; |
| 63 cinfo->min_DCT_v_scaled_size = DCTSIZE; |
| 64 } |
| 65 #endif |
| 66 |
| 67 |
45 LOCAL(void) | 68 LOCAL(void) |
46 initial_setup (j_compress_ptr cinfo) | 69 initial_setup (j_compress_ptr cinfo, boolean transcode_only) |
47 /* Do computations that are needed before master selection phase */ | 70 /* Do computations that are needed before master selection phase */ |
48 { | 71 { |
49 int ci; | 72 int ci; |
50 jpeg_component_info *compptr; | 73 jpeg_component_info *compptr; |
51 long samplesperrow; | 74 long samplesperrow; |
52 JDIMENSION jd_samplesperrow; | 75 JDIMENSION jd_samplesperrow; |
53 | 76 |
| 77 #if JPEG_LIB_VERSION >= 70 |
| 78 #if JPEG_LIB_VERSION >= 80 |
| 79 if (!transcode_only) |
| 80 #endif |
| 81 jpeg_calc_jpeg_dimensions(cinfo); |
| 82 #endif |
| 83 |
54 /* Sanity check on image dimensions */ | 84 /* Sanity check on image dimensions */ |
55 if (cinfo->image_height <= 0 || cinfo->image_width <= 0 | 85 if (cinfo->_jpeg_height <= 0 || cinfo->_jpeg_width <= 0 |
56 || cinfo->num_components <= 0 || cinfo->input_components <= 0) | 86 || cinfo->num_components <= 0 || cinfo->input_components <= 0) |
57 ERREXIT(cinfo, JERR_EMPTY_IMAGE); | 87 ERREXIT(cinfo, JERR_EMPTY_IMAGE); |
58 | 88 |
59 /* Make sure image isn't bigger than I can handle */ | 89 /* Make sure image isn't bigger than I can handle */ |
60 if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION || | 90 if ((long) cinfo->_jpeg_height > (long) JPEG_MAX_DIMENSION || |
61 (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION) | 91 (long) cinfo->_jpeg_width > (long) JPEG_MAX_DIMENSION) |
62 ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); | 92 ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION); |
63 | 93 |
64 /* Width of an input scanline must be representable as JDIMENSION. */ | 94 /* Width of an input scanline must be representable as JDIMENSION. */ |
65 samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components; | 95 samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components; |
66 jd_samplesperrow = (JDIMENSION) samplesperrow; | 96 jd_samplesperrow = (JDIMENSION) samplesperrow; |
67 if ((long) jd_samplesperrow != samplesperrow) | 97 if ((long) jd_samplesperrow != samplesperrow) |
68 ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); | 98 ERREXIT(cinfo, JERR_WIDTH_OVERFLOW); |
69 | 99 |
70 /* For now, precision must match compiled-in value... */ | 100 /* For now, precision must match compiled-in value... */ |
71 if (cinfo->data_precision != BITS_IN_JSAMPLE) | 101 if (cinfo->data_precision != BITS_IN_JSAMPLE) |
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89 cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, | 119 cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, |
90 compptr->v_samp_factor); | 120 compptr->v_samp_factor); |
91 } | 121 } |
92 | 122 |
93 /* Compute dimensions of components */ | 123 /* Compute dimensions of components */ |
94 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; | 124 for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
95 ci++, compptr++) { | 125 ci++, compptr++) { |
96 /* Fill in the correct component_index value; don't rely on application */ | 126 /* Fill in the correct component_index value; don't rely on application */ |
97 compptr->component_index = ci; | 127 compptr->component_index = ci; |
98 /* For compression, we never do DCT scaling. */ | 128 /* For compression, we never do DCT scaling. */ |
| 129 #if JPEG_LIB_VERSION >= 70 |
| 130 compptr->DCT_h_scaled_size = compptr->DCT_v_scaled_size = DCTSIZE; |
| 131 #else |
99 compptr->DCT_scaled_size = DCTSIZE; | 132 compptr->DCT_scaled_size = DCTSIZE; |
| 133 #endif |
100 /* Size in DCT blocks */ | 134 /* Size in DCT blocks */ |
101 compptr->width_in_blocks = (JDIMENSION) | 135 compptr->width_in_blocks = (JDIMENSION) |
102 jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, | 136 jdiv_round_up((long) cinfo->_jpeg_width * (long) compptr->h_samp_factor, |
103 (long) (cinfo->max_h_samp_factor * DCTSIZE)); | 137 (long) (cinfo->max_h_samp_factor * DCTSIZE)); |
104 compptr->height_in_blocks = (JDIMENSION) | 138 compptr->height_in_blocks = (JDIMENSION) |
105 jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, | 139 jdiv_round_up((long) cinfo->_jpeg_height * (long) compptr->v_samp_factor, |
106 (long) (cinfo->max_v_samp_factor * DCTSIZE)); | 140 (long) (cinfo->max_v_samp_factor * DCTSIZE)); |
107 /* Size in samples */ | 141 /* Size in samples */ |
108 compptr->downsampled_width = (JDIMENSION) | 142 compptr->downsampled_width = (JDIMENSION) |
109 jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, | 143 jdiv_round_up((long) cinfo->_jpeg_width * (long) compptr->h_samp_factor, |
110 (long) cinfo->max_h_samp_factor); | 144 (long) cinfo->max_h_samp_factor); |
111 compptr->downsampled_height = (JDIMENSION) | 145 compptr->downsampled_height = (JDIMENSION) |
112 jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, | 146 jdiv_round_up((long) cinfo->_jpeg_height * (long) compptr->v_samp_factor, |
113 (long) cinfo->max_v_samp_factor); | 147 (long) cinfo->max_v_samp_factor); |
114 /* Mark component needed (this flag isn't actually used for compression) */ | 148 /* Mark component needed (this flag isn't actually used for compression) */ |
115 compptr->component_needed = TRUE; | 149 compptr->component_needed = TRUE; |
116 } | 150 } |
117 | 151 |
118 /* Compute number of fully interleaved MCU rows (number of times that | 152 /* Compute number of fully interleaved MCU rows (number of times that |
119 * main controller will call coefficient controller). | 153 * main controller will call coefficient controller). |
120 */ | 154 */ |
121 cinfo->total_iMCU_rows = (JDIMENSION) | 155 cinfo->total_iMCU_rows = (JDIMENSION) |
122 jdiv_round_up((long) cinfo->image_height, | 156 jdiv_round_up((long) cinfo->_jpeg_height, |
123 (long) (cinfo->max_v_samp_factor*DCTSIZE)); | 157 (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
124 } | 158 } |
125 | 159 |
126 | 160 |
127 #ifdef C_MULTISCAN_FILES_SUPPORTED | 161 #ifdef C_MULTISCAN_FILES_SUPPORTED |
128 | 162 |
129 LOCAL(void) | 163 LOCAL(void) |
130 validate_script (j_compress_ptr cinfo) | 164 validate_script (j_compress_ptr cinfo) |
131 /* Verify that the scan script in cinfo->scan_info[] is valid; also | 165 /* Verify that the scan script in cinfo->scan_info[] is valid; also |
132 * determine whether it uses progressive JPEG, and set cinfo->progressive_mode. | 166 * determine whether it uses progressive JPEG, and set cinfo->progressive_mode. |
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340 | 374 |
341 } else { | 375 } else { |
342 | 376 |
343 /* Interleaved (multi-component) scan */ | 377 /* Interleaved (multi-component) scan */ |
344 if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) | 378 if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) |
345 ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, | 379 ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, |
346 MAX_COMPS_IN_SCAN); | 380 MAX_COMPS_IN_SCAN); |
347 | 381 |
348 /* Overall image size in MCUs */ | 382 /* Overall image size in MCUs */ |
349 cinfo->MCUs_per_row = (JDIMENSION) | 383 cinfo->MCUs_per_row = (JDIMENSION) |
350 jdiv_round_up((long) cinfo->image_width, | 384 jdiv_round_up((long) cinfo->_jpeg_width, |
351 (long) (cinfo->max_h_samp_factor*DCTSIZE)); | 385 (long) (cinfo->max_h_samp_factor*DCTSIZE)); |
352 cinfo->MCU_rows_in_scan = (JDIMENSION) | 386 cinfo->MCU_rows_in_scan = (JDIMENSION) |
353 jdiv_round_up((long) cinfo->image_height, | 387 jdiv_round_up((long) cinfo->_jpeg_height, |
354 (long) (cinfo->max_v_samp_factor*DCTSIZE)); | 388 (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
355 | 389 |
356 cinfo->blocks_in_MCU = 0; | 390 cinfo->blocks_in_MCU = 0; |
357 | 391 |
358 for (ci = 0; ci < cinfo->comps_in_scan; ci++) { | 392 for (ci = 0; ci < cinfo->comps_in_scan; ci++) { |
359 compptr = cinfo->cur_comp_info[ci]; | 393 compptr = cinfo->cur_comp_info[ci]; |
360 /* Sampling factors give # of blocks of component in each MCU */ | 394 /* Sampling factors give # of blocks of component in each MCU */ |
361 compptr->MCU_width = compptr->h_samp_factor; | 395 compptr->MCU_width = compptr->h_samp_factor; |
362 compptr->MCU_height = compptr->v_samp_factor; | 396 compptr->MCU_height = compptr->v_samp_factor; |
363 compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; | 397 compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height; |
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547 master = (my_master_ptr) | 581 master = (my_master_ptr) |
548 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, | 582 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
549 SIZEOF(my_comp_master)); | 583 SIZEOF(my_comp_master)); |
550 cinfo->master = (struct jpeg_comp_master *) master; | 584 cinfo->master = (struct jpeg_comp_master *) master; |
551 master->pub.prepare_for_pass = prepare_for_pass; | 585 master->pub.prepare_for_pass = prepare_for_pass; |
552 master->pub.pass_startup = pass_startup; | 586 master->pub.pass_startup = pass_startup; |
553 master->pub.finish_pass = finish_pass_master; | 587 master->pub.finish_pass = finish_pass_master; |
554 master->pub.is_last_pass = FALSE; | 588 master->pub.is_last_pass = FALSE; |
555 | 589 |
556 /* Validate parameters, determine derived values */ | 590 /* Validate parameters, determine derived values */ |
557 initial_setup(cinfo); | 591 initial_setup(cinfo, transcode_only); |
558 | 592 |
559 if (cinfo->scan_info != NULL) { | 593 if (cinfo->scan_info != NULL) { |
560 #ifdef C_MULTISCAN_FILES_SUPPORTED | 594 #ifdef C_MULTISCAN_FILES_SUPPORTED |
561 validate_script(cinfo); | 595 validate_script(cinfo); |
562 #else | 596 #else |
563 ERREXIT(cinfo, JERR_NOT_COMPILED); | 597 ERREXIT(cinfo, JERR_NOT_COMPILED); |
564 #endif | 598 #endif |
565 } else { | 599 } else { |
566 cinfo->progressive_mode = FALSE; | 600 cinfo->progressive_mode = FALSE; |
567 cinfo->num_scans = 1; | 601 cinfo->num_scans = 1; |
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581 /* for normal compression, first pass is always this type: */ | 615 /* for normal compression, first pass is always this type: */ |
582 master->pass_type = main_pass; | 616 master->pass_type = main_pass; |
583 } | 617 } |
584 master->scan_number = 0; | 618 master->scan_number = 0; |
585 master->pass_number = 0; | 619 master->pass_number = 0; |
586 if (cinfo->optimize_coding) | 620 if (cinfo->optimize_coding) |
587 master->total_passes = cinfo->num_scans * 2; | 621 master->total_passes = cinfo->num_scans * 2; |
588 else | 622 else |
589 master->total_passes = cinfo->num_scans; | 623 master->total_passes = cinfo->num_scans; |
590 } | 624 } |
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