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author | David Walter Seikel | 2013-01-13 18:54:10 +1000 |
---|---|---|
committer | David Walter Seikel | 2013-01-13 18:54:10 +1000 |
commit | 959831f4ef5a3e797f576c3de08cd65032c997ad (patch) | |
tree | e7351908be5995f0b325b2ebeaa02d5a34b82583 /libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h | |
parent | Add info about changes to Irrlicht. (diff) | |
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Remove damned ancient DOS line endings from Irrlicht. Hopefully I did not go overboard.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h | 786 |
1 files changed, 393 insertions, 393 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h index b1ff912..360dec8 100644 --- a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jdct.h | |||
@@ -1,393 +1,393 @@ | |||
1 | /* | 1 | /* |
2 | * jdct.h | 2 | * jdct.h |
3 | * | 3 | * |
4 | * Copyright (C) 1994-1996, Thomas G. Lane. | 4 | * Copyright (C) 1994-1996, Thomas G. Lane. |
5 | * This file is part of the Independent JPEG Group's software. | 5 | * This file is part of the Independent JPEG Group's software. |
6 | * For conditions of distribution and use, see the accompanying README file. | 6 | * For conditions of distribution and use, see the accompanying README file. |
7 | * | 7 | * |
8 | * This include file contains common declarations for the forward and | 8 | * This include file contains common declarations for the forward and |
9 | * inverse DCT modules. These declarations are private to the DCT managers | 9 | * inverse DCT modules. These declarations are private to the DCT managers |
10 | * (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms. | 10 | * (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms. |
11 | * The individual DCT algorithms are kept in separate files to ease | 11 | * The individual DCT algorithms are kept in separate files to ease |
12 | * machine-dependent tuning (e.g., assembly coding). | 12 | * machine-dependent tuning (e.g., assembly coding). |
13 | */ | 13 | */ |
14 | 14 | ||
15 | 15 | ||
16 | /* | 16 | /* |
17 | * A forward DCT routine is given a pointer to an input sample array and | 17 | * A forward DCT routine is given a pointer to an input sample array and |
18 | * a pointer to a work area of type DCTELEM[]; the DCT is to be performed | 18 | * a pointer to a work area of type DCTELEM[]; the DCT is to be performed |
19 | * in-place in that buffer. Type DCTELEM is int for 8-bit samples, INT32 | 19 | * in-place in that buffer. Type DCTELEM is int for 8-bit samples, INT32 |
20 | * for 12-bit samples. (NOTE: Floating-point DCT implementations use an | 20 | * for 12-bit samples. (NOTE: Floating-point DCT implementations use an |
21 | * array of type FAST_FLOAT, instead.) | 21 | * array of type FAST_FLOAT, instead.) |
22 | * The input data is to be fetched from the sample array starting at a | 22 | * The input data is to be fetched from the sample array starting at a |
23 | * specified column. (Any row offset needed will be applied to the array | 23 | * specified column. (Any row offset needed will be applied to the array |
24 | * pointer before it is passed to the FDCT code.) | 24 | * pointer before it is passed to the FDCT code.) |
25 | * Note that the number of samples fetched by the FDCT routine is | 25 | * Note that the number of samples fetched by the FDCT routine is |
26 | * DCT_h_scaled_size * DCT_v_scaled_size. | 26 | * DCT_h_scaled_size * DCT_v_scaled_size. |
27 | * The DCT outputs are returned scaled up by a factor of 8; they therefore | 27 | * The DCT outputs are returned scaled up by a factor of 8; they therefore |
28 | * have a range of +-8K for 8-bit data, +-128K for 12-bit data. This | 28 | * have a range of +-8K for 8-bit data, +-128K for 12-bit data. This |
29 | * convention improves accuracy in integer implementations and saves some | 29 | * convention improves accuracy in integer implementations and saves some |
30 | * work in floating-point ones. | 30 | * work in floating-point ones. |
31 | * Quantization of the output coefficients is done by jcdctmgr.c. | 31 | * Quantization of the output coefficients is done by jcdctmgr.c. |
32 | */ | 32 | */ |
33 | 33 | ||
34 | #if BITS_IN_JSAMPLE == 8 | 34 | #if BITS_IN_JSAMPLE == 8 |
35 | typedef int DCTELEM; /* 16 or 32 bits is fine */ | 35 | typedef int DCTELEM; /* 16 or 32 bits is fine */ |
36 | #else | 36 | #else |
37 | typedef INT32 DCTELEM; /* must have 32 bits */ | 37 | typedef INT32 DCTELEM; /* must have 32 bits */ |
38 | #endif | 38 | #endif |
39 | 39 | ||
40 | typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data, | 40 | typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data, |
41 | JSAMPARRAY sample_data, | 41 | JSAMPARRAY sample_data, |
42 | JDIMENSION start_col)); | 42 | JDIMENSION start_col)); |
43 | typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data, | 43 | typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data, |
44 | JSAMPARRAY sample_data, | 44 | JSAMPARRAY sample_data, |
45 | JDIMENSION start_col)); | 45 | JDIMENSION start_col)); |
46 | 46 | ||
47 | 47 | ||
48 | /* | 48 | /* |
49 | * An inverse DCT routine is given a pointer to the input JBLOCK and a pointer | 49 | * An inverse DCT routine is given a pointer to the input JBLOCK and a pointer |
50 | * to an output sample array. The routine must dequantize the input data as | 50 | * to an output sample array. The routine must dequantize the input data as |
51 | * well as perform the IDCT; for dequantization, it uses the multiplier table | 51 | * well as perform the IDCT; for dequantization, it uses the multiplier table |
52 | * pointed to by compptr->dct_table. The output data is to be placed into the | 52 | * pointed to by compptr->dct_table. The output data is to be placed into the |
53 | * sample array starting at a specified column. (Any row offset needed will | 53 | * sample array starting at a specified column. (Any row offset needed will |
54 | * be applied to the array pointer before it is passed to the IDCT code.) | 54 | * be applied to the array pointer before it is passed to the IDCT code.) |
55 | * Note that the number of samples emitted by the IDCT routine is | 55 | * Note that the number of samples emitted by the IDCT routine is |
56 | * DCT_h_scaled_size * DCT_v_scaled_size. | 56 | * DCT_h_scaled_size * DCT_v_scaled_size. |
57 | */ | 57 | */ |
58 | 58 | ||
59 | /* typedef inverse_DCT_method_ptr is declared in jpegint.h */ | 59 | /* typedef inverse_DCT_method_ptr is declared in jpegint.h */ |
60 | 60 | ||
61 | /* | 61 | /* |
62 | * Each IDCT routine has its own ideas about the best dct_table element type. | 62 | * Each IDCT routine has its own ideas about the best dct_table element type. |
63 | */ | 63 | */ |
64 | 64 | ||
65 | typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */ | 65 | typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */ |
66 | #if BITS_IN_JSAMPLE == 8 | 66 | #if BITS_IN_JSAMPLE == 8 |
67 | typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */ | 67 | typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */ |
68 | #define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */ | 68 | #define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */ |
69 | #else | 69 | #else |
70 | typedef INT32 IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */ | 70 | typedef INT32 IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */ |
71 | #define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */ | 71 | #define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */ |
72 | #endif | 72 | #endif |
73 | typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */ | 73 | typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */ |
74 | 74 | ||
75 | 75 | ||
76 | /* | 76 | /* |
77 | * Each IDCT routine is responsible for range-limiting its results and | 77 | * Each IDCT routine is responsible for range-limiting its results and |
78 | * converting them to unsigned form (0..MAXJSAMPLE). The raw outputs could | 78 | * converting them to unsigned form (0..MAXJSAMPLE). The raw outputs could |
79 | * be quite far out of range if the input data is corrupt, so a bulletproof | 79 | * be quite far out of range if the input data is corrupt, so a bulletproof |
80 | * range-limiting step is required. We use a mask-and-table-lookup method | 80 | * range-limiting step is required. We use a mask-and-table-lookup method |
81 | * to do the combined operations quickly. See the comments with | 81 | * to do the combined operations quickly. See the comments with |
82 | * prepare_range_limit_table (in jdmaster.c) for more info. | 82 | * prepare_range_limit_table (in jdmaster.c) for more info. |
83 | */ | 83 | */ |
84 | 84 | ||
85 | #define IDCT_range_limit(cinfo) ((cinfo)->sample_range_limit + CENTERJSAMPLE) | 85 | #define IDCT_range_limit(cinfo) ((cinfo)->sample_range_limit + CENTERJSAMPLE) |
86 | 86 | ||
87 | #define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */ | 87 | #define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */ |
88 | 88 | ||
89 | 89 | ||
90 | /* Short forms of external names for systems with brain-damaged linkers. */ | 90 | /* Short forms of external names for systems with brain-damaged linkers. */ |
91 | 91 | ||
92 | #ifdef NEED_SHORT_EXTERNAL_NAMES | 92 | #ifdef NEED_SHORT_EXTERNAL_NAMES |
93 | #define jpeg_fdct_islow jFDislow | 93 | #define jpeg_fdct_islow jFDislow |
94 | #define jpeg_fdct_ifast jFDifast | 94 | #define jpeg_fdct_ifast jFDifast |
95 | #define jpeg_fdct_float jFDfloat | 95 | #define jpeg_fdct_float jFDfloat |
96 | #define jpeg_fdct_7x7 jFD7x7 | 96 | #define jpeg_fdct_7x7 jFD7x7 |
97 | #define jpeg_fdct_6x6 jFD6x6 | 97 | #define jpeg_fdct_6x6 jFD6x6 |
98 | #define jpeg_fdct_5x5 jFD5x5 | 98 | #define jpeg_fdct_5x5 jFD5x5 |
99 | #define jpeg_fdct_4x4 jFD4x4 | 99 | #define jpeg_fdct_4x4 jFD4x4 |
100 | #define jpeg_fdct_3x3 jFD3x3 | 100 | #define jpeg_fdct_3x3 jFD3x3 |
101 | #define jpeg_fdct_2x2 jFD2x2 | 101 | #define jpeg_fdct_2x2 jFD2x2 |
102 | #define jpeg_fdct_1x1 jFD1x1 | 102 | #define jpeg_fdct_1x1 jFD1x1 |
103 | #define jpeg_fdct_9x9 jFD9x9 | 103 | #define jpeg_fdct_9x9 jFD9x9 |
104 | #define jpeg_fdct_10x10 jFD10x10 | 104 | #define jpeg_fdct_10x10 jFD10x10 |
105 | #define jpeg_fdct_11x11 jFD11x11 | 105 | #define jpeg_fdct_11x11 jFD11x11 |
106 | #define jpeg_fdct_12x12 jFD12x12 | 106 | #define jpeg_fdct_12x12 jFD12x12 |
107 | #define jpeg_fdct_13x13 jFD13x13 | 107 | #define jpeg_fdct_13x13 jFD13x13 |
108 | #define jpeg_fdct_14x14 jFD14x14 | 108 | #define jpeg_fdct_14x14 jFD14x14 |
109 | #define jpeg_fdct_15x15 jFD15x15 | 109 | #define jpeg_fdct_15x15 jFD15x15 |
110 | #define jpeg_fdct_16x16 jFD16x16 | 110 | #define jpeg_fdct_16x16 jFD16x16 |
111 | #define jpeg_fdct_16x8 jFD16x8 | 111 | #define jpeg_fdct_16x8 jFD16x8 |
112 | #define jpeg_fdct_14x7 jFD14x7 | 112 | #define jpeg_fdct_14x7 jFD14x7 |
113 | #define jpeg_fdct_12x6 jFD12x6 | 113 | #define jpeg_fdct_12x6 jFD12x6 |
114 | #define jpeg_fdct_10x5 jFD10x5 | 114 | #define jpeg_fdct_10x5 jFD10x5 |
115 | #define jpeg_fdct_8x4 jFD8x4 | 115 | #define jpeg_fdct_8x4 jFD8x4 |
116 | #define jpeg_fdct_6x3 jFD6x3 | 116 | #define jpeg_fdct_6x3 jFD6x3 |
117 | #define jpeg_fdct_4x2 jFD4x2 | 117 | #define jpeg_fdct_4x2 jFD4x2 |
118 | #define jpeg_fdct_2x1 jFD2x1 | 118 | #define jpeg_fdct_2x1 jFD2x1 |
119 | #define jpeg_fdct_8x16 jFD8x16 | 119 | #define jpeg_fdct_8x16 jFD8x16 |
120 | #define jpeg_fdct_7x14 jFD7x14 | 120 | #define jpeg_fdct_7x14 jFD7x14 |
121 | #define jpeg_fdct_6x12 jFD6x12 | 121 | #define jpeg_fdct_6x12 jFD6x12 |
122 | #define jpeg_fdct_5x10 jFD5x10 | 122 | #define jpeg_fdct_5x10 jFD5x10 |
123 | #define jpeg_fdct_4x8 jFD4x8 | 123 | #define jpeg_fdct_4x8 jFD4x8 |
124 | #define jpeg_fdct_3x6 jFD3x6 | 124 | #define jpeg_fdct_3x6 jFD3x6 |
125 | #define jpeg_fdct_2x4 jFD2x4 | 125 | #define jpeg_fdct_2x4 jFD2x4 |
126 | #define jpeg_fdct_1x2 jFD1x2 | 126 | #define jpeg_fdct_1x2 jFD1x2 |
127 | #define jpeg_idct_islow jRDislow | 127 | #define jpeg_idct_islow jRDislow |
128 | #define jpeg_idct_ifast jRDifast | 128 | #define jpeg_idct_ifast jRDifast |
129 | #define jpeg_idct_float jRDfloat | 129 | #define jpeg_idct_float jRDfloat |
130 | #define jpeg_idct_7x7 jRD7x7 | 130 | #define jpeg_idct_7x7 jRD7x7 |
131 | #define jpeg_idct_6x6 jRD6x6 | 131 | #define jpeg_idct_6x6 jRD6x6 |
132 | #define jpeg_idct_5x5 jRD5x5 | 132 | #define jpeg_idct_5x5 jRD5x5 |
133 | #define jpeg_idct_4x4 jRD4x4 | 133 | #define jpeg_idct_4x4 jRD4x4 |
134 | #define jpeg_idct_3x3 jRD3x3 | 134 | #define jpeg_idct_3x3 jRD3x3 |
135 | #define jpeg_idct_2x2 jRD2x2 | 135 | #define jpeg_idct_2x2 jRD2x2 |
136 | #define jpeg_idct_1x1 jRD1x1 | 136 | #define jpeg_idct_1x1 jRD1x1 |
137 | #define jpeg_idct_9x9 jRD9x9 | 137 | #define jpeg_idct_9x9 jRD9x9 |
138 | #define jpeg_idct_10x10 jRD10x10 | 138 | #define jpeg_idct_10x10 jRD10x10 |
139 | #define jpeg_idct_11x11 jRD11x11 | 139 | #define jpeg_idct_11x11 jRD11x11 |
140 | #define jpeg_idct_12x12 jRD12x12 | 140 | #define jpeg_idct_12x12 jRD12x12 |
141 | #define jpeg_idct_13x13 jRD13x13 | 141 | #define jpeg_idct_13x13 jRD13x13 |
142 | #define jpeg_idct_14x14 jRD14x14 | 142 | #define jpeg_idct_14x14 jRD14x14 |
143 | #define jpeg_idct_15x15 jRD15x15 | 143 | #define jpeg_idct_15x15 jRD15x15 |
144 | #define jpeg_idct_16x16 jRD16x16 | 144 | #define jpeg_idct_16x16 jRD16x16 |
145 | #define jpeg_idct_16x8 jRD16x8 | 145 | #define jpeg_idct_16x8 jRD16x8 |
146 | #define jpeg_idct_14x7 jRD14x7 | 146 | #define jpeg_idct_14x7 jRD14x7 |
147 | #define jpeg_idct_12x6 jRD12x6 | 147 | #define jpeg_idct_12x6 jRD12x6 |
148 | #define jpeg_idct_10x5 jRD10x5 | 148 | #define jpeg_idct_10x5 jRD10x5 |
149 | #define jpeg_idct_8x4 jRD8x4 | 149 | #define jpeg_idct_8x4 jRD8x4 |
150 | #define jpeg_idct_6x3 jRD6x3 | 150 | #define jpeg_idct_6x3 jRD6x3 |
151 | #define jpeg_idct_4x2 jRD4x2 | 151 | #define jpeg_idct_4x2 jRD4x2 |
152 | #define jpeg_idct_2x1 jRD2x1 | 152 | #define jpeg_idct_2x1 jRD2x1 |
153 | #define jpeg_idct_8x16 jRD8x16 | 153 | #define jpeg_idct_8x16 jRD8x16 |
154 | #define jpeg_idct_7x14 jRD7x14 | 154 | #define jpeg_idct_7x14 jRD7x14 |
155 | #define jpeg_idct_6x12 jRD6x12 | 155 | #define jpeg_idct_6x12 jRD6x12 |
156 | #define jpeg_idct_5x10 jRD5x10 | 156 | #define jpeg_idct_5x10 jRD5x10 |
157 | #define jpeg_idct_4x8 jRD4x8 | 157 | #define jpeg_idct_4x8 jRD4x8 |
158 | #define jpeg_idct_3x6 jRD3x8 | 158 | #define jpeg_idct_3x6 jRD3x8 |
159 | #define jpeg_idct_2x4 jRD2x4 | 159 | #define jpeg_idct_2x4 jRD2x4 |
160 | #define jpeg_idct_1x2 jRD1x2 | 160 | #define jpeg_idct_1x2 jRD1x2 |
161 | #endif /* NEED_SHORT_EXTERNAL_NAMES */ | 161 | #endif /* NEED_SHORT_EXTERNAL_NAMES */ |
162 | 162 | ||
163 | /* Extern declarations for the forward and inverse DCT routines. */ | 163 | /* Extern declarations for the forward and inverse DCT routines. */ |
164 | 164 | ||
165 | EXTERN(void) jpeg_fdct_islow | 165 | EXTERN(void) jpeg_fdct_islow |
166 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 166 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
167 | EXTERN(void) jpeg_fdct_ifast | 167 | EXTERN(void) jpeg_fdct_ifast |
168 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 168 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
169 | EXTERN(void) jpeg_fdct_float | 169 | EXTERN(void) jpeg_fdct_float |
170 | JPP((FAST_FLOAT * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 170 | JPP((FAST_FLOAT * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
171 | EXTERN(void) jpeg_fdct_7x7 | 171 | EXTERN(void) jpeg_fdct_7x7 |
172 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 172 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
173 | EXTERN(void) jpeg_fdct_6x6 | 173 | EXTERN(void) jpeg_fdct_6x6 |
174 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 174 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
175 | EXTERN(void) jpeg_fdct_5x5 | 175 | EXTERN(void) jpeg_fdct_5x5 |
176 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 176 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
177 | EXTERN(void) jpeg_fdct_4x4 | 177 | EXTERN(void) jpeg_fdct_4x4 |
178 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 178 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
179 | EXTERN(void) jpeg_fdct_3x3 | 179 | EXTERN(void) jpeg_fdct_3x3 |
180 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 180 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
181 | EXTERN(void) jpeg_fdct_2x2 | 181 | EXTERN(void) jpeg_fdct_2x2 |
182 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 182 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
183 | EXTERN(void) jpeg_fdct_1x1 | 183 | EXTERN(void) jpeg_fdct_1x1 |
184 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 184 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
185 | EXTERN(void) jpeg_fdct_9x9 | 185 | EXTERN(void) jpeg_fdct_9x9 |
186 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 186 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
187 | EXTERN(void) jpeg_fdct_10x10 | 187 | EXTERN(void) jpeg_fdct_10x10 |
188 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 188 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
189 | EXTERN(void) jpeg_fdct_11x11 | 189 | EXTERN(void) jpeg_fdct_11x11 |
190 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 190 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
191 | EXTERN(void) jpeg_fdct_12x12 | 191 | EXTERN(void) jpeg_fdct_12x12 |
192 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 192 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
193 | EXTERN(void) jpeg_fdct_13x13 | 193 | EXTERN(void) jpeg_fdct_13x13 |
194 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 194 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
195 | EXTERN(void) jpeg_fdct_14x14 | 195 | EXTERN(void) jpeg_fdct_14x14 |
196 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 196 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
197 | EXTERN(void) jpeg_fdct_15x15 | 197 | EXTERN(void) jpeg_fdct_15x15 |
198 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 198 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
199 | EXTERN(void) jpeg_fdct_16x16 | 199 | EXTERN(void) jpeg_fdct_16x16 |
200 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 200 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
201 | EXTERN(void) jpeg_fdct_16x8 | 201 | EXTERN(void) jpeg_fdct_16x8 |
202 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 202 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
203 | EXTERN(void) jpeg_fdct_14x7 | 203 | EXTERN(void) jpeg_fdct_14x7 |
204 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 204 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
205 | EXTERN(void) jpeg_fdct_12x6 | 205 | EXTERN(void) jpeg_fdct_12x6 |
206 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 206 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
207 | EXTERN(void) jpeg_fdct_10x5 | 207 | EXTERN(void) jpeg_fdct_10x5 |
208 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 208 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
209 | EXTERN(void) jpeg_fdct_8x4 | 209 | EXTERN(void) jpeg_fdct_8x4 |
210 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 210 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
211 | EXTERN(void) jpeg_fdct_6x3 | 211 | EXTERN(void) jpeg_fdct_6x3 |
212 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 212 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
213 | EXTERN(void) jpeg_fdct_4x2 | 213 | EXTERN(void) jpeg_fdct_4x2 |
214 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 214 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
215 | EXTERN(void) jpeg_fdct_2x1 | 215 | EXTERN(void) jpeg_fdct_2x1 |
216 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 216 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
217 | EXTERN(void) jpeg_fdct_8x16 | 217 | EXTERN(void) jpeg_fdct_8x16 |
218 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 218 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
219 | EXTERN(void) jpeg_fdct_7x14 | 219 | EXTERN(void) jpeg_fdct_7x14 |
220 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 220 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
221 | EXTERN(void) jpeg_fdct_6x12 | 221 | EXTERN(void) jpeg_fdct_6x12 |
222 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 222 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
223 | EXTERN(void) jpeg_fdct_5x10 | 223 | EXTERN(void) jpeg_fdct_5x10 |
224 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 224 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
225 | EXTERN(void) jpeg_fdct_4x8 | 225 | EXTERN(void) jpeg_fdct_4x8 |
226 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 226 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
227 | EXTERN(void) jpeg_fdct_3x6 | 227 | EXTERN(void) jpeg_fdct_3x6 |
228 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 228 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
229 | EXTERN(void) jpeg_fdct_2x4 | 229 | EXTERN(void) jpeg_fdct_2x4 |
230 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 230 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
231 | EXTERN(void) jpeg_fdct_1x2 | 231 | EXTERN(void) jpeg_fdct_1x2 |
232 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); | 232 | JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)); |
233 | 233 | ||
234 | EXTERN(void) jpeg_idct_islow | 234 | EXTERN(void) jpeg_idct_islow |
235 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 235 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
236 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 236 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
237 | EXTERN(void) jpeg_idct_ifast | 237 | EXTERN(void) jpeg_idct_ifast |
238 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 238 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
239 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 239 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
240 | EXTERN(void) jpeg_idct_float | 240 | EXTERN(void) jpeg_idct_float |
241 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 241 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
242 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 242 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
243 | EXTERN(void) jpeg_idct_7x7 | 243 | EXTERN(void) jpeg_idct_7x7 |
244 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 244 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
245 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 245 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
246 | EXTERN(void) jpeg_idct_6x6 | 246 | EXTERN(void) jpeg_idct_6x6 |
247 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 247 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
248 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 248 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
249 | EXTERN(void) jpeg_idct_5x5 | 249 | EXTERN(void) jpeg_idct_5x5 |
250 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 250 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
251 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 251 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
252 | EXTERN(void) jpeg_idct_4x4 | 252 | EXTERN(void) jpeg_idct_4x4 |
253 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 253 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
254 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 254 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
255 | EXTERN(void) jpeg_idct_3x3 | 255 | EXTERN(void) jpeg_idct_3x3 |
256 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 256 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
257 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 257 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
258 | EXTERN(void) jpeg_idct_2x2 | 258 | EXTERN(void) jpeg_idct_2x2 |
259 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 259 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
260 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 260 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
261 | EXTERN(void) jpeg_idct_1x1 | 261 | EXTERN(void) jpeg_idct_1x1 |
262 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 262 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
263 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 263 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
264 | EXTERN(void) jpeg_idct_9x9 | 264 | EXTERN(void) jpeg_idct_9x9 |
265 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 265 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
266 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 266 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
267 | EXTERN(void) jpeg_idct_10x10 | 267 | EXTERN(void) jpeg_idct_10x10 |
268 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 268 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
269 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 269 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
270 | EXTERN(void) jpeg_idct_11x11 | 270 | EXTERN(void) jpeg_idct_11x11 |
271 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 271 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
272 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 272 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
273 | EXTERN(void) jpeg_idct_12x12 | 273 | EXTERN(void) jpeg_idct_12x12 |
274 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 274 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
275 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 275 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
276 | EXTERN(void) jpeg_idct_13x13 | 276 | EXTERN(void) jpeg_idct_13x13 |
277 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 277 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
278 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 278 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
279 | EXTERN(void) jpeg_idct_14x14 | 279 | EXTERN(void) jpeg_idct_14x14 |
280 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 280 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
281 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 281 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
282 | EXTERN(void) jpeg_idct_15x15 | 282 | EXTERN(void) jpeg_idct_15x15 |
283 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 283 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
284 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 284 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
285 | EXTERN(void) jpeg_idct_16x16 | 285 | EXTERN(void) jpeg_idct_16x16 |
286 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 286 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
287 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 287 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
288 | EXTERN(void) jpeg_idct_16x8 | 288 | EXTERN(void) jpeg_idct_16x8 |
289 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 289 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
290 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 290 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
291 | EXTERN(void) jpeg_idct_14x7 | 291 | EXTERN(void) jpeg_idct_14x7 |
292 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 292 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
293 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 293 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
294 | EXTERN(void) jpeg_idct_12x6 | 294 | EXTERN(void) jpeg_idct_12x6 |
295 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 295 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
296 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 296 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
297 | EXTERN(void) jpeg_idct_10x5 | 297 | EXTERN(void) jpeg_idct_10x5 |
298 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 298 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
299 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 299 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
300 | EXTERN(void) jpeg_idct_8x4 | 300 | EXTERN(void) jpeg_idct_8x4 |
301 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 301 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
302 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 302 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
303 | EXTERN(void) jpeg_idct_6x3 | 303 | EXTERN(void) jpeg_idct_6x3 |
304 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 304 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
305 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 305 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
306 | EXTERN(void) jpeg_idct_4x2 | 306 | EXTERN(void) jpeg_idct_4x2 |
307 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 307 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
308 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 308 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
309 | EXTERN(void) jpeg_idct_2x1 | 309 | EXTERN(void) jpeg_idct_2x1 |
310 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 310 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
311 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 311 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
312 | EXTERN(void) jpeg_idct_8x16 | 312 | EXTERN(void) jpeg_idct_8x16 |
313 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 313 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
314 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 314 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
315 | EXTERN(void) jpeg_idct_7x14 | 315 | EXTERN(void) jpeg_idct_7x14 |
316 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 316 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
317 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 317 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
318 | EXTERN(void) jpeg_idct_6x12 | 318 | EXTERN(void) jpeg_idct_6x12 |
319 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 319 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
320 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 320 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
321 | EXTERN(void) jpeg_idct_5x10 | 321 | EXTERN(void) jpeg_idct_5x10 |
322 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 322 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
323 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 323 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
324 | EXTERN(void) jpeg_idct_4x8 | 324 | EXTERN(void) jpeg_idct_4x8 |
325 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 325 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
326 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 326 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
327 | EXTERN(void) jpeg_idct_3x6 | 327 | EXTERN(void) jpeg_idct_3x6 |
328 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 328 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
329 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 329 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
330 | EXTERN(void) jpeg_idct_2x4 | 330 | EXTERN(void) jpeg_idct_2x4 |
331 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 331 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
332 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 332 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
333 | EXTERN(void) jpeg_idct_1x2 | 333 | EXTERN(void) jpeg_idct_1x2 |
334 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, | 334 | JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr, |
335 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); | 335 | JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)); |
336 | 336 | ||
337 | 337 | ||
338 | /* | 338 | /* |
339 | * Macros for handling fixed-point arithmetic; these are used by many | 339 | * Macros for handling fixed-point arithmetic; these are used by many |
340 | * but not all of the DCT/IDCT modules. | 340 | * but not all of the DCT/IDCT modules. |
341 | * | 341 | * |
342 | * All values are expected to be of type INT32. | 342 | * All values are expected to be of type INT32. |
343 | * Fractional constants are scaled left by CONST_BITS bits. | 343 | * Fractional constants are scaled left by CONST_BITS bits. |
344 | * CONST_BITS is defined within each module using these macros, | 344 | * CONST_BITS is defined within each module using these macros, |
345 | * and may differ from one module to the next. | 345 | * and may differ from one module to the next. |
346 | */ | 346 | */ |
347 | 347 | ||
348 | #define ONE ((INT32) 1) | 348 | #define ONE ((INT32) 1) |
349 | #define CONST_SCALE (ONE << CONST_BITS) | 349 | #define CONST_SCALE (ONE << CONST_BITS) |
350 | 350 | ||
351 | /* Convert a positive real constant to an integer scaled by CONST_SCALE. | 351 | /* Convert a positive real constant to an integer scaled by CONST_SCALE. |
352 | * Caution: some C compilers fail to reduce "FIX(constant)" at compile time, | 352 | * Caution: some C compilers fail to reduce "FIX(constant)" at compile time, |
353 | * thus causing a lot of useless floating-point operations at run time. | 353 | * thus causing a lot of useless floating-point operations at run time. |
354 | */ | 354 | */ |
355 | 355 | ||
356 | #define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5)) | 356 | #define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5)) |
357 | 357 | ||
358 | /* Descale and correctly round an INT32 value that's scaled by N bits. | 358 | /* Descale and correctly round an INT32 value that's scaled by N bits. |
359 | * We assume RIGHT_SHIFT rounds towards minus infinity, so adding | 359 | * We assume RIGHT_SHIFT rounds towards minus infinity, so adding |
360 | * the fudge factor is correct for either sign of X. | 360 | * the fudge factor is correct for either sign of X. |
361 | */ | 361 | */ |
362 | 362 | ||
363 | #define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n) | 363 | #define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n) |
364 | 364 | ||
365 | /* Multiply an INT32 variable by an INT32 constant to yield an INT32 result. | 365 | /* Multiply an INT32 variable by an INT32 constant to yield an INT32 result. |
366 | * This macro is used only when the two inputs will actually be no more than | 366 | * This macro is used only when the two inputs will actually be no more than |
367 | * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a | 367 | * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a |
368 | * full 32x32 multiply. This provides a useful speedup on many machines. | 368 | * full 32x32 multiply. This provides a useful speedup on many machines. |
369 | * Unfortunately there is no way to specify a 16x16->32 multiply portably | 369 | * Unfortunately there is no way to specify a 16x16->32 multiply portably |
370 | * in C, but some C compilers will do the right thing if you provide the | 370 | * in C, but some C compilers will do the right thing if you provide the |
371 | * correct combination of casts. | 371 | * correct combination of casts. |
372 | */ | 372 | */ |
373 | 373 | ||
374 | #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */ | 374 | #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */ |
375 | #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT16) (const))) | 375 | #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT16) (const))) |
376 | #endif | 376 | #endif |
377 | #ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */ | 377 | #ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */ |
378 | #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT32) (const))) | 378 | #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT32) (const))) |
379 | #endif | 379 | #endif |
380 | 380 | ||
381 | #ifndef MULTIPLY16C16 /* default definition */ | 381 | #ifndef MULTIPLY16C16 /* default definition */ |
382 | #define MULTIPLY16C16(var,const) ((var) * (const)) | 382 | #define MULTIPLY16C16(var,const) ((var) * (const)) |
383 | #endif | 383 | #endif |
384 | 384 | ||
385 | /* Same except both inputs are variables. */ | 385 | /* Same except both inputs are variables. */ |
386 | 386 | ||
387 | #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */ | 387 | #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */ |
388 | #define MULTIPLY16V16(var1,var2) (((INT16) (var1)) * ((INT16) (var2))) | 388 | #define MULTIPLY16V16(var1,var2) (((INT16) (var1)) * ((INT16) (var2))) |
389 | #endif | 389 | #endif |
390 | 390 | ||
391 | #ifndef MULTIPLY16V16 /* default definition */ | 391 | #ifndef MULTIPLY16V16 /* default definition */ |
392 | #define MULTIPLY16V16(var1,var2) ((var1) * (var2)) | 392 | #define MULTIPLY16V16(var1,var2) ((var1) * (var2)) |
393 | #endif | 393 | #endif |