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Side by Side Diff: jpegint.h

Issue 1953443002: Update to libjpeg_turbo 1.4.90 (Closed) Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master
Patch Set: Created 4 years, 7 months ago
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1 /* 1 /*
2 * jpegint.h 2 * jpegint.h
3 * 3 *
4 * This file was part of the Independent JPEG Group's software:
4 * Copyright (C) 1991-1997, Thomas G. Lane. 5 * Copyright (C) 1991-1997, Thomas G. Lane.
5 * Modified 1997-2009 by Guido Vollbeding. 6 * Modified 1997-2009 by Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software. 7 * libjpeg-turbo Modifications:
7 * For conditions of distribution and use, see the accompanying README file. 8 * Copyright (C) 2015-2016, D. R. Commander
9 * Copyright (C) 2015, Google, Inc.
10 * For conditions of distribution and use, see the accompanying README.ijg
11 * file.
8 * 12 *
9 * This file provides common declarations for the various JPEG modules. 13 * This file provides common declarations for the various JPEG modules.
10 * These declarations are considered internal to the JPEG library; most 14 * These declarations are considered internal to the JPEG library; most
11 * applications using the library shouldn't need to include this file. 15 * applications using the library shouldn't need to include this file.
12 */ 16 */
13 17
14 18
15 /* Declarations for both compression & decompression */ 19 /* Declarations for both compression & decompression */
16 20
17 typedef enum {» » » /* Operating modes for buffer controllers */ 21 typedef enum { /* Operating modes for buffer controllers */
18 » JBUF_PASS_THRU,»» /* Plain stripwise operation */ 22 JBUF_PASS_THRU, /* Plain stripwise operation */
19 » /* Remaining modes require a full-image buffer to have been created */ 23 /* Remaining modes require a full-image buffer to have been created */
20 » JBUF_SAVE_SOURCE,» /* Run source subobject only, save output */ 24 JBUF_SAVE_SOURCE, /* Run source subobject only, save output */
21 » JBUF_CRANK_DEST,» /* Run dest subobject only, using saved data */ 25 JBUF_CRANK_DEST, /* Run dest subobject only, using saved data */
22 » JBUF_SAVE_AND_PASS» /* Run both subobjects, save output */ 26 JBUF_SAVE_AND_PASS /* Run both subobjects, save output */
23 } J_BUF_MODE; 27 } J_BUF_MODE;
24 28
25 /* Values of global_state field (jdapi.c has some dependencies on ordering!) */ 29 /* Values of global_state field (jdapi.c has some dependencies on ordering!) */
26 #define CSTATE_START» 100» /* after create_compress */ 30 #define CSTATE_START 100 /* after create_compress */
27 #define CSTATE_SCANNING»101» /* start_compress done, write_scanlines OK */ 31 #define CSTATE_SCANNING 101 /* start_compress done, write_scanlines OK */
28 #define CSTATE_RAW_OK» 102» /* start_compress done, write_raw_data OK */ 32 #define CSTATE_RAW_OK 102 /* start_compress done, write_raw_data OK */
29 #define CSTATE_WRCOEFS» 103» /* jpeg_write_coefficients done */ 33 #define CSTATE_WRCOEFS 103 /* jpeg_write_coefficients done */
30 #define DSTATE_START» 200» /* after create_decompress */ 34 #define DSTATE_START 200 /* after create_decompress */
31 #define DSTATE_INHEADER»201» /* reading header markers, no SOS yet */ 35 #define DSTATE_INHEADER 201 /* reading header markers, no SOS yet */
32 #define DSTATE_READY» 202» /* found SOS, ready for start_decompress */ 36 #define DSTATE_READY 202 /* found SOS, ready for start_decompress */
33 #define DSTATE_PRELOAD» 203» /* reading multiscan file in start_decompress*/ 37 #define DSTATE_PRELOAD 203 /* reading multiscan file in start_decompress*/
34 #define DSTATE_PRESCAN» 204» /* performing dummy pass for 2-pass quant */ 38 #define DSTATE_PRESCAN 204 /* performing dummy pass for 2-pass quant */
35 #define DSTATE_SCANNING»205» /* start_decompress done, read_scanlines OK */ 39 #define DSTATE_SCANNING 205 /* start_decompress done, read_scanlines OK */
36 #define DSTATE_RAW_OK» 206» /* start_decompress done, read_raw_data OK */ 40 #define DSTATE_RAW_OK 206 /* start_decompress done, read_raw_data OK */
37 #define DSTATE_BUFIMAGE»207» /* expecting jpeg_start_output */ 41 #define DSTATE_BUFIMAGE 207 /* expecting jpeg_start_output */
38 #define DSTATE_BUFPOST» 208» /* looking for SOS/EOI in jpeg_finish_output */ 42 #define DSTATE_BUFPOST 208 /* looking for SOS/EOI in jpeg_finish_output */
39 #define DSTATE_RDCOEFS» 209» /* reading file in jpeg_read_coefficients */ 43 #define DSTATE_RDCOEFS 209 /* reading file in jpeg_read_coefficients */
40 #define DSTATE_STOPPING»210» /* looking for EOI in jpeg_finish_decompress */ 44 #define DSTATE_STOPPING 210 /* looking for EOI in jpeg_finish_decompress */
45
46
47 /* JLONG must hold at least signed 32-bit values. */
48 typedef long JLONG;
49
50
51 /*
52 * Left shift macro that handles a negative operand without causing any
53 * sanitizer warnings
54 */
55
56 #define LEFT_SHIFT(a, b) ((JLONG)((unsigned long)(a) << (b)))
41 57
42 58
43 /* Declarations for compression modules */ 59 /* Declarations for compression modules */
44 60
45 /* Master control module */ 61 /* Master control module */
46 struct jpeg_comp_master { 62 struct jpeg_comp_master {
47 JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo)); 63 void (*prepare_for_pass) (j_compress_ptr cinfo);
48 JMETHOD(void, pass_startup, (j_compress_ptr cinfo)); 64 void (*pass_startup) (j_compress_ptr cinfo);
49 JMETHOD(void, finish_pass, (j_compress_ptr cinfo)); 65 void (*finish_pass) (j_compress_ptr cinfo);
50 66
51 /* State variables made visible to other modules */ 67 /* State variables made visible to other modules */
52 boolean call_pass_startup;» /* True if pass_startup must be called */ 68 boolean call_pass_startup; /* True if pass_startup must be called */
53 boolean is_last_pass;»» /* True during last pass */ 69 boolean is_last_pass; /* True during last pass */
54 }; 70 };
55 71
56 /* Main buffer control (downsampled-data buffer) */ 72 /* Main buffer control (downsampled-data buffer) */
57 struct jpeg_c_main_controller { 73 struct jpeg_c_main_controller {
58 JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode)); 74 void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
59 JMETHOD(void, process_data, (j_compress_ptr cinfo, 75 void (*process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
60 » » » JSAMPARRAY input_buf, JDIMENSION *in_row_ctr, 76 JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail);
61 » » » JDIMENSION in_rows_avail));
62 }; 77 };
63 78
64 /* Compression preprocessing (downsampling input buffer control) */ 79 /* Compression preprocessing (downsampling input buffer control) */
65 struct jpeg_c_prep_controller { 80 struct jpeg_c_prep_controller {
66 JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode)); 81 void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
67 JMETHOD(void, pre_process_data, (j_compress_ptr cinfo, 82 void (*pre_process_data) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
68 » » » » JSAMPARRAY input_buf, 83 JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail,
69 » » » » JDIMENSION *in_row_ctr, 84 JSAMPIMAGE output_buf,
70 » » » » JDIMENSION in_rows_avail, 85 JDIMENSION *out_row_group_ctr,
71 » » » » JSAMPIMAGE output_buf, 86 JDIMENSION out_row_groups_avail);
72 » » » » JDIMENSION *out_row_group_ctr,
73 » » » » JDIMENSION out_row_groups_avail));
74 }; 87 };
75 88
76 /* Coefficient buffer control */ 89 /* Coefficient buffer control */
77 struct jpeg_c_coef_controller { 90 struct jpeg_c_coef_controller {
78 JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode)); 91 void (*start_pass) (j_compress_ptr cinfo, J_BUF_MODE pass_mode);
79 JMETHOD(boolean, compress_data, (j_compress_ptr cinfo, 92 boolean (*compress_data) (j_compress_ptr cinfo, JSAMPIMAGE input_buf);
80 » » » » JSAMPIMAGE input_buf));
81 }; 93 };
82 94
83 /* Colorspace conversion */ 95 /* Colorspace conversion */
84 struct jpeg_color_converter { 96 struct jpeg_color_converter {
85 JMETHOD(void, start_pass, (j_compress_ptr cinfo)); 97 void (*start_pass) (j_compress_ptr cinfo);
86 JMETHOD(void, color_convert, (j_compress_ptr cinfo, 98 void (*color_convert) (j_compress_ptr cinfo, JSAMPARRAY input_buf,
87 » » » » JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 99 JSAMPIMAGE output_buf, JDIMENSION output_row,
88 » » » » JDIMENSION output_row, int num_rows)); 100 int num_rows);
89 }; 101 };
90 102
91 /* Downsampling */ 103 /* Downsampling */
92 struct jpeg_downsampler { 104 struct jpeg_downsampler {
93 JMETHOD(void, start_pass, (j_compress_ptr cinfo)); 105 void (*start_pass) (j_compress_ptr cinfo);
94 JMETHOD(void, downsample, (j_compress_ptr cinfo, 106 void (*downsample) (j_compress_ptr cinfo, JSAMPIMAGE input_buf,
95 » » » JSAMPIMAGE input_buf, JDIMENSION in_row_index, 107 JDIMENSION in_row_index, JSAMPIMAGE output_buf,
96 » » » JSAMPIMAGE output_buf, 108 JDIMENSION out_row_group_index);
97 » » » JDIMENSION out_row_group_index));
98 109
99 boolean need_context_rows;» /* TRUE if need rows above & below */ 110 boolean need_context_rows; /* TRUE if need rows above & below */
100 }; 111 };
101 112
102 /* Forward DCT (also controls coefficient quantization) */ 113 /* Forward DCT (also controls coefficient quantization) */
103 struct jpeg_forward_dct { 114 struct jpeg_forward_dct {
104 JMETHOD(void, start_pass, (j_compress_ptr cinfo)); 115 void (*start_pass) (j_compress_ptr cinfo);
105 /* perhaps this should be an array??? */ 116 /* perhaps this should be an array??? */
106 JMETHOD(void, forward_DCT, (j_compress_ptr cinfo, 117 void (*forward_DCT) (j_compress_ptr cinfo, jpeg_component_info *compptr,
107 » » » jpeg_component_info * compptr, 118 JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
108 » » » JSAMPARRAY sample_data, JBLOCKROW coef_blocks, 119 JDIMENSION start_row, JDIMENSION start_col,
109 » » » JDIMENSION start_row, JDIMENSION start_col, 120 JDIMENSION num_blocks);
110 » » » JDIMENSION num_blocks));
111 }; 121 };
112 122
113 /* Entropy encoding */ 123 /* Entropy encoding */
114 struct jpeg_entropy_encoder { 124 struct jpeg_entropy_encoder {
115 JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics)); 125 void (*start_pass) (j_compress_ptr cinfo, boolean gather_statistics);
116 JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data)); 126 boolean (*encode_mcu) (j_compress_ptr cinfo, JBLOCKROW *MCU_data);
117 JMETHOD(void, finish_pass, (j_compress_ptr cinfo)); 127 void (*finish_pass) (j_compress_ptr cinfo);
118 }; 128 };
119 129
120 /* Marker writing */ 130 /* Marker writing */
121 struct jpeg_marker_writer { 131 struct jpeg_marker_writer {
122 JMETHOD(void, write_file_header, (j_compress_ptr cinfo)); 132 void (*write_file_header) (j_compress_ptr cinfo);
123 JMETHOD(void, write_frame_header, (j_compress_ptr cinfo)); 133 void (*write_frame_header) (j_compress_ptr cinfo);
124 JMETHOD(void, write_scan_header, (j_compress_ptr cinfo)); 134 void (*write_scan_header) (j_compress_ptr cinfo);
125 JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo)); 135 void (*write_file_trailer) (j_compress_ptr cinfo);
126 JMETHOD(void, write_tables_only, (j_compress_ptr cinfo)); 136 void (*write_tables_only) (j_compress_ptr cinfo);
127 /* These routines are exported to allow insertion of extra markers */ 137 /* These routines are exported to allow insertion of extra markers */
128 /* Probably only COM and APPn markers should be written this way */ 138 /* Probably only COM and APPn markers should be written this way */
129 JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker, 139 void (*write_marker_header) (j_compress_ptr cinfo, int marker,
130 » » » » unsigned int datalen)); 140 unsigned int datalen);
131 JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val)); 141 void (*write_marker_byte) (j_compress_ptr cinfo, int val);
132 }; 142 };
133 143
134 144
135 /* Declarations for decompression modules */ 145 /* Declarations for decompression modules */
136 146
137 /* Master control module */ 147 /* Master control module */
138 struct jpeg_decomp_master { 148 struct jpeg_decomp_master {
139 JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo)); 149 void (*prepare_for_output_pass) (j_decompress_ptr cinfo);
140 JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo)); 150 void (*finish_output_pass) (j_decompress_ptr cinfo);
141 151
142 /* State variables made visible to other modules */ 152 /* State variables made visible to other modules */
143 boolean is_dummy_pass;» /* True during 1st pass for 2-pass quant */ 153 boolean is_dummy_pass; /* True during 1st pass for 2-pass quant */
154
155 /* Partial decompression variables */
156 JDIMENSION first_iMCU_col;
157 JDIMENSION last_iMCU_col;
158 JDIMENSION first_MCU_col[MAX_COMPS_IN_SCAN];
159 JDIMENSION last_MCU_col[MAX_COMPS_IN_SCAN];
160 boolean jinit_upsampler_no_alloc;
144 }; 161 };
145 162
146 /* Input control module */ 163 /* Input control module */
147 struct jpeg_input_controller { 164 struct jpeg_input_controller {
148 JMETHOD(int, consume_input, (j_decompress_ptr cinfo)); 165 int (*consume_input) (j_decompress_ptr cinfo);
149 JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo)); 166 void (*reset_input_controller) (j_decompress_ptr cinfo);
150 JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo)); 167 void (*start_input_pass) (j_decompress_ptr cinfo);
151 JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo)); 168 void (*finish_input_pass) (j_decompress_ptr cinfo);
152 169
153 /* State variables made visible to other modules */ 170 /* State variables made visible to other modules */
154 boolean has_multiple_scans;» /* True if file has multiple scans */ 171 boolean has_multiple_scans; /* True if file has multiple scans */
155 boolean eoi_reached;» » /* True when EOI has been consumed */ 172 boolean eoi_reached; /* True when EOI has been consumed */
156 }; 173 };
157 174
158 /* Main buffer control (downsampled-data buffer) */ 175 /* Main buffer control (downsampled-data buffer) */
159 struct jpeg_d_main_controller { 176 struct jpeg_d_main_controller {
160 JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)); 177 void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
161 JMETHOD(void, process_data, (j_decompress_ptr cinfo, 178 void (*process_data) (j_decompress_ptr cinfo, JSAMPARRAY output_buf,
162 » » » JSAMPARRAY output_buf, JDIMENSION *out_row_ctr, 179 JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
163 » » » JDIMENSION out_rows_avail));
164 }; 180 };
165 181
166 /* Coefficient buffer control */ 182 /* Coefficient buffer control */
167 struct jpeg_d_coef_controller { 183 struct jpeg_d_coef_controller {
168 JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo)); 184 void (*start_input_pass) (j_decompress_ptr cinfo);
169 JMETHOD(int, consume_data, (j_decompress_ptr cinfo)); 185 int (*consume_data) (j_decompress_ptr cinfo);
170 JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo)); 186 void (*start_output_pass) (j_decompress_ptr cinfo);
171 JMETHOD(int, decompress_data, (j_decompress_ptr cinfo, 187 int (*decompress_data) (j_decompress_ptr cinfo, JSAMPIMAGE output_buf);
172 » » » » JSAMPIMAGE output_buf));
173 /* Pointer to array of coefficient virtual arrays, or NULL if none */ 188 /* Pointer to array of coefficient virtual arrays, or NULL if none */
174 jvirt_barray_ptr *coef_arrays; 189 jvirt_barray_ptr *coef_arrays;
175 }; 190 };
176 191
177 /* Decompression postprocessing (color quantization buffer control) */ 192 /* Decompression postprocessing (color quantization buffer control) */
178 struct jpeg_d_post_controller { 193 struct jpeg_d_post_controller {
179 JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)); 194 void (*start_pass) (j_decompress_ptr cinfo, J_BUF_MODE pass_mode);
180 JMETHOD(void, post_process_data, (j_decompress_ptr cinfo, 195 void (*post_process_data) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
181 » » » » JSAMPIMAGE input_buf, 196 JDIMENSION *in_row_group_ctr,
182 » » » » JDIMENSION *in_row_group_ctr, 197 JDIMENSION in_row_groups_avail,
183 » » » » JDIMENSION in_row_groups_avail, 198 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
184 » » » » JSAMPARRAY output_buf, 199 JDIMENSION out_rows_avail);
185 » » » » JDIMENSION *out_row_ctr,
186 » » » » JDIMENSION out_rows_avail));
187 }; 200 };
188 201
189 /* Marker reading & parsing */ 202 /* Marker reading & parsing */
190 struct jpeg_marker_reader { 203 struct jpeg_marker_reader {
191 JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo)); 204 void (*reset_marker_reader) (j_decompress_ptr cinfo);
192 /* Read markers until SOS or EOI. 205 /* Read markers until SOS or EOI.
193 * Returns same codes as are defined for jpeg_consume_input: 206 * Returns same codes as are defined for jpeg_consume_input:
194 * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI. 207 * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
195 */ 208 */
196 JMETHOD(int, read_markers, (j_decompress_ptr cinfo)); 209 int (*read_markers) (j_decompress_ptr cinfo);
197 /* Read a restart marker --- exported for use by entropy decoder only */ 210 /* Read a restart marker --- exported for use by entropy decoder only */
198 jpeg_marker_parser_method read_restart_marker; 211 jpeg_marker_parser_method read_restart_marker;
199 212
200 /* State of marker reader --- nominally internal, but applications 213 /* State of marker reader --- nominally internal, but applications
201 * supplying COM or APPn handlers might like to know the state. 214 * supplying COM or APPn handlers might like to know the state.
202 */ 215 */
203 boolean saw_SOI;» » /* found SOI? */ 216 boolean saw_SOI; /* found SOI? */
204 boolean saw_SOF;» » /* found SOF? */ 217 boolean saw_SOF; /* found SOF? */
205 int next_restart_num;»» /* next restart number expected (0-7) */ 218 int next_restart_num; /* next restart number expected (0-7) */
206 unsigned int discarded_bytes;»/* # of bytes skipped looking for a marker */ 219 unsigned int discarded_bytes; /* # of bytes skipped looking for a marker */
207 }; 220 };
208 221
209 /* Entropy decoding */ 222 /* Entropy decoding */
210 struct jpeg_entropy_decoder { 223 struct jpeg_entropy_decoder {
211 JMETHOD(void, start_pass, (j_decompress_ptr cinfo)); 224 void (*start_pass) (j_decompress_ptr cinfo);
212 JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo, 225 boolean (*decode_mcu) (j_decompress_ptr cinfo, JBLOCKROW *MCU_data);
213 » » » » JBLOCKROW *MCU_data));
214 226
215 /* This is here to share code between baseline and progressive decoders; */ 227 /* This is here to share code between baseline and progressive decoders; */
216 /* other modules probably should not use it */ 228 /* other modules probably should not use it */
217 boolean insufficient_data;» /* set TRUE after emitting warning */ 229 boolean insufficient_data; /* set TRUE after emitting warning */
218 }; 230 };
219 231
220 /* Inverse DCT (also performs dequantization) */ 232 /* Inverse DCT (also performs dequantization) */
221 typedef JMETHOD(void, inverse_DCT_method_ptr, 233 typedef void (*inverse_DCT_method_ptr) (j_decompress_ptr cinfo,
222 » » (j_decompress_ptr cinfo, jpeg_component_info * compptr, 234 jpeg_component_info *compptr,
223 » » JCOEFPTR coef_block, 235 JCOEFPTR coef_block,
224 » » JSAMPARRAY output_buf, JDIMENSION output_col)); 236 JSAMPARRAY output_buf,
237 JDIMENSION output_col);
225 238
226 struct jpeg_inverse_dct { 239 struct jpeg_inverse_dct {
227 JMETHOD(void, start_pass, (j_decompress_ptr cinfo)); 240 void (*start_pass) (j_decompress_ptr cinfo);
228 /* It is useful to allow each component to have a separate IDCT method. */ 241 /* It is useful to allow each component to have a separate IDCT method. */
229 inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS]; 242 inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
230 }; 243 };
231 244
232 /* Upsampling (note that upsampler must also call color converter) */ 245 /* Upsampling (note that upsampler must also call color converter) */
233 struct jpeg_upsampler { 246 struct jpeg_upsampler {
234 JMETHOD(void, start_pass, (j_decompress_ptr cinfo)); 247 void (*start_pass) (j_decompress_ptr cinfo);
235 JMETHOD(void, upsample, (j_decompress_ptr cinfo, 248 void (*upsample) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
236 » » » JSAMPIMAGE input_buf, 249 JDIMENSION *in_row_group_ctr,
237 » » » JDIMENSION *in_row_group_ctr, 250 JDIMENSION in_row_groups_avail, JSAMPARRAY output_buf,
238 » » » JDIMENSION in_row_groups_avail, 251 JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail);
239 » » » JSAMPARRAY output_buf,
240 » » » JDIMENSION *out_row_ctr,
241 » » » JDIMENSION out_rows_avail));
242 252
243 boolean need_context_rows;» /* TRUE if need rows above & below */ 253 boolean need_context_rows; /* TRUE if need rows above & below */
244 }; 254 };
245 255
246 /* Colorspace conversion */ 256 /* Colorspace conversion */
247 struct jpeg_color_deconverter { 257 struct jpeg_color_deconverter {
248 JMETHOD(void, start_pass, (j_decompress_ptr cinfo)); 258 void (*start_pass) (j_decompress_ptr cinfo);
249 JMETHOD(void, color_convert, (j_decompress_ptr cinfo, 259 void (*color_convert) (j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
250 » » » » JSAMPIMAGE input_buf, JDIMENSION input_row, 260 JDIMENSION input_row, JSAMPARRAY output_buf,
251 » » » » JSAMPARRAY output_buf, int num_rows)); 261 int num_rows);
252 }; 262 };
253 263
254 /* Color quantization or color precision reduction */ 264 /* Color quantization or color precision reduction */
255 struct jpeg_color_quantizer { 265 struct jpeg_color_quantizer {
256 JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan)); 266 void (*start_pass) (j_decompress_ptr cinfo, boolean is_pre_scan);
257 JMETHOD(void, color_quantize, (j_decompress_ptr cinfo, 267 void (*color_quantize) (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
258 » » » » JSAMPARRAY input_buf, JSAMPARRAY output_buf, 268 JSAMPARRAY output_buf, int num_rows);
259 » » » » int num_rows)); 269 void (*finish_pass) (j_decompress_ptr cinfo);
260 JMETHOD(void, finish_pass, (j_decompress_ptr cinfo)); 270 void (*new_color_map) (j_decompress_ptr cinfo);
261 JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));
262 }; 271 };
263 272
264 273
265 /* Miscellaneous useful macros */ 274 /* Miscellaneous useful macros */
266 275
267 #undef MAX 276 #undef MAX
268 #define MAX(a,b)» ((a) > (b) ? (a) : (b)) 277 #define MAX(a,b) ((a) > (b) ? (a) : (b))
269 #undef MIN 278 #undef MIN
270 #define MIN(a,b)» ((a) < (b) ? (a) : (b)) 279 #define MIN(a,b) ((a) < (b) ? (a) : (b))
271 280
272 281
273 /* We assume that right shift corresponds to signed division by 2 with 282 /* We assume that right shift corresponds to signed division by 2 with
274 * rounding towards minus infinity. This is correct for typical "arithmetic 283 * rounding towards minus infinity. This is correct for typical "arithmetic
275 * shift" instructions that shift in copies of the sign bit. But some 284 * shift" instructions that shift in copies of the sign bit. But some
276 * C compilers implement >> with an unsigned shift. For these machines you 285 * C compilers implement >> with an unsigned shift. For these machines you
277 * must define RIGHT_SHIFT_IS_UNSIGNED. 286 * must define RIGHT_SHIFT_IS_UNSIGNED.
278 * RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity. 287 * RIGHT_SHIFT provides a proper signed right shift of a JLONG quantity.
279 * It is only applied with constant shift counts. SHIFT_TEMPS must be 288 * It is only applied with constant shift counts. SHIFT_TEMPS must be
280 * included in the variables of any routine using RIGHT_SHIFT. 289 * included in the variables of any routine using RIGHT_SHIFT.
281 */ 290 */
282 291
283 #ifdef RIGHT_SHIFT_IS_UNSIGNED 292 #ifdef RIGHT_SHIFT_IS_UNSIGNED
284 #define SHIFT_TEMPS» INT32 shift_temp; 293 #define SHIFT_TEMPS JLONG shift_temp;
285 #define RIGHT_SHIFT(x,shft) \ 294 #define RIGHT_SHIFT(x,shft) \
286 » ((shift_temp = (x)) < 0 ? \ 295 ((shift_temp = (x)) < 0 ? \
287 » (shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \ 296 (shift_temp >> (shft)) | ((~((JLONG) 0)) << (32-(shft))) : \
288 » (shift_temp >> (shft))) 297 (shift_temp >> (shft)))
289 #else 298 #else
290 #define SHIFT_TEMPS 299 #define SHIFT_TEMPS
291 #define RIGHT_SHIFT(x,shft)» ((x) >> (shft)) 300 #define RIGHT_SHIFT(x,shft) ((x) >> (shft))
292 #endif 301 #endif
293 302
294 303
295 /* Short forms of external names for systems with brain-damaged linkers. */
296
297 #ifdef NEED_SHORT_EXTERNAL_NAMES
298 #define jinit_compress_master jICompress
299 #define jinit_c_master_control jICMaster
300 #define jinit_c_main_controller jICMainC
301 #define jinit_c_prep_controller jICPrepC
302 #define jinit_c_coef_controller jICCoefC
303 #define jinit_color_converter jICColor
304 #define jinit_downsampler jIDownsampler
305 #define jinit_forward_dct jIFDCT
306 #define jinit_huff_encoder jIHEncoder
307 #define jinit_phuff_encoder jIPHEncoder
308 #define jinit_arith_encoder jIAEncoder
309 #define jinit_marker_writer jIMWriter
310 #define jinit_master_decompress jIDMaster
311 #define jinit_d_main_controller jIDMainC
312 #define jinit_d_coef_controller jIDCoefC
313 #define jinit_d_post_controller jIDPostC
314 #define jinit_input_controller jIInCtlr
315 #define jinit_marker_reader jIMReader
316 #define jinit_huff_decoder jIHDecoder
317 #define jinit_phuff_decoder jIPHDecoder
318 #define jinit_arith_decoder jIADecoder
319 #define jinit_inverse_dct jIIDCT
320 #define jinit_upsampler jIUpsampler
321 #define jinit_color_deconverter jIDColor
322 #define jinit_1pass_quantizer jI1Quant
323 #define jinit_2pass_quantizer jI2Quant
324 #define jinit_merged_upsampler jIMUpsampler
325 #define jinit_memory_mgr jIMemMgr
326 #define jdiv_round_up jDivRound
327 #define jround_up jRound
328 #define jcopy_sample_rows jCopySamples
329 #define jcopy_block_row jCopyBlocks
330 #define jzero_far jZeroFar
331 #define jpeg_zigzag_order jZIGTable
332 #define jpeg_natural_order jZAGTable
333 #define jpeg_aritab jAriTab
334 #endif /* NEED_SHORT_EXTERNAL_NAMES */
335
336
337 /* Compression module initialization routines */ 304 /* Compression module initialization routines */
338 EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo)); 305 EXTERN(void) jinit_compress_master (j_compress_ptr cinfo);
339 EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo, 306 EXTERN(void) jinit_c_master_control (j_compress_ptr cinfo,
340 » » » » » boolean transcode_only)); 307 boolean transcode_only);
341 EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo, 308 EXTERN(void) jinit_c_main_controller (j_compress_ptr cinfo,
342 » » » » » boolean need_full_buffer)); 309 boolean need_full_buffer);
343 EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo, 310 EXTERN(void) jinit_c_prep_controller (j_compress_ptr cinfo,
344 » » » » » boolean need_full_buffer)); 311 boolean need_full_buffer);
345 EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo, 312 EXTERN(void) jinit_c_coef_controller (j_compress_ptr cinfo,
346 » » » » » boolean need_full_buffer)); 313 boolean need_full_buffer);
347 EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo)); 314 EXTERN(void) jinit_color_converter (j_compress_ptr cinfo);
348 EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo)); 315 EXTERN(void) jinit_downsampler (j_compress_ptr cinfo);
349 EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo)); 316 EXTERN(void) jinit_forward_dct (j_compress_ptr cinfo);
350 EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo)); 317 EXTERN(void) jinit_huff_encoder (j_compress_ptr cinfo);
351 EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo)); 318 EXTERN(void) jinit_phuff_encoder (j_compress_ptr cinfo);
352 EXTERN(void) jinit_arith_encoder JPP((j_compress_ptr cinfo)); 319 EXTERN(void) jinit_arith_encoder (j_compress_ptr cinfo);
353 EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo)); 320 EXTERN(void) jinit_marker_writer (j_compress_ptr cinfo);
354 /* Decompression module initialization routines */ 321 /* Decompression module initialization routines */
355 EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo)); 322 EXTERN(void) jinit_master_decompress (j_decompress_ptr cinfo);
356 EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo, 323 EXTERN(void) jinit_d_main_controller (j_decompress_ptr cinfo,
357 » » » » » boolean need_full_buffer)); 324 boolean need_full_buffer);
358 EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo, 325 EXTERN(void) jinit_d_coef_controller (j_decompress_ptr cinfo,
359 » » » » » boolean need_full_buffer)); 326 boolean need_full_buffer);
360 EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo, 327 EXTERN(void) jinit_d_post_controller (j_decompress_ptr cinfo,
361 » » » » » boolean need_full_buffer)); 328 boolean need_full_buffer);
362 EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo)); 329 EXTERN(void) jinit_input_controller (j_decompress_ptr cinfo);
363 EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo)); 330 EXTERN(void) jinit_marker_reader (j_decompress_ptr cinfo);
364 EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo)); 331 EXTERN(void) jinit_huff_decoder (j_decompress_ptr cinfo);
365 EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo)); 332 EXTERN(void) jinit_phuff_decoder (j_decompress_ptr cinfo);
366 EXTERN(void) jinit_arith_decoder JPP((j_decompress_ptr cinfo)); 333 EXTERN(void) jinit_arith_decoder (j_decompress_ptr cinfo);
367 EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo)); 334 EXTERN(void) jinit_inverse_dct (j_decompress_ptr cinfo);
368 EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo)); 335 EXTERN(void) jinit_upsampler (j_decompress_ptr cinfo);
369 EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo)); 336 EXTERN(void) jinit_color_deconverter (j_decompress_ptr cinfo);
370 EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo)); 337 EXTERN(void) jinit_1pass_quantizer (j_decompress_ptr cinfo);
371 EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo)); 338 EXTERN(void) jinit_2pass_quantizer (j_decompress_ptr cinfo);
372 EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo)); 339 EXTERN(void) jinit_merged_upsampler (j_decompress_ptr cinfo);
373 /* Memory manager initialization */ 340 /* Memory manager initialization */
374 EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo)); 341 EXTERN(void) jinit_memory_mgr (j_common_ptr cinfo);
375 342
376 /* Utility routines in jutils.c */ 343 /* Utility routines in jutils.c */
377 EXTERN(long) jdiv_round_up JPP((long a, long b)); 344 EXTERN(long) jdiv_round_up (long a, long b);
378 EXTERN(long) jround_up JPP((long a, long b)); 345 EXTERN(long) jround_up (long a, long b);
379 EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row, 346 EXTERN(void) jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
380 » » » » JSAMPARRAY output_array, int dest_row, 347 JSAMPARRAY output_array, int dest_row,
381 » » » » int num_rows, JDIMENSION num_cols)); 348 int num_rows, JDIMENSION num_cols);
382 EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row, 349 EXTERN(void) jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
383 » » » » JDIMENSION num_blocks)); 350 JDIMENSION num_blocks);
384 EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero)); 351 EXTERN(void) jzero_far (void *target, size_t bytestozero);
385 /* Constant tables in jutils.c */ 352 /* Constant tables in jutils.c */
386 #if 0» » » » /* This table is not actually needed in v6a */ 353 #if 0 /* This table is not actually needed in v6a */
387 extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */ 354 extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
388 #endif 355 #endif
389 extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */ 356 extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
390 357
391 /* Arithmetic coding probability estimation tables in jaricom.c */ 358 /* Arithmetic coding probability estimation tables in jaricom.c */
392 extern const INT32 jpeg_aritab[]; 359 extern const JLONG jpeg_aritab[];
393 360
394 /* Suppress undefined-structure complaints if necessary. */ 361 /* Suppress undefined-structure complaints if necessary. */
395 362
396 #ifdef INCOMPLETE_TYPES_BROKEN 363 #ifdef INCOMPLETE_TYPES_BROKEN
397 #ifndef AM_MEMORY_MANAGER» /* only jmemmgr.c defines these */ 364 #ifndef AM_MEMORY_MANAGER /* only jmemmgr.c defines these */
398 struct jvirt_sarray_control { long dummy; }; 365 struct jvirt_sarray_control { long dummy; };
399 struct jvirt_barray_control { long dummy; }; 366 struct jvirt_barray_control { long dummy; };
400 #endif 367 #endif
401 #endif /* INCOMPLETE_TYPES_BROKEN */ 368 #endif /* INCOMPLETE_TYPES_BROKEN */
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