Shoaib Ahmed / Mbed 2 deprecated uzairkhan

Final 350 project

Dependencies:   uzair Camera_LS_Y201 F7_Ethernet LCD_DISCO_F746NG NetworkAPI SDFileSystem mbed

includes/jdct.h@0:791a779d6220, 2017-07-31 (annotated)

Committer:
shoaib_ahmed
Date:
Mon Jul 31 09:16:35 2017 +0000
Revision:
0:791a779d6220
final project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shoaib_ahmed 0:791a779d6220 1 /*
shoaib_ahmed 0:791a779d6220 2 * jdct.h
shoaib_ahmed 0:791a779d6220 3 *
shoaib_ahmed 0:791a779d6220 4 * Copyright (C) 1994-1996, Thomas G. Lane.
shoaib_ahmed 0:791a779d6220 5 * Modified 2002-2015 by Guido Vollbeding.
shoaib_ahmed 0:791a779d6220 6 * This file is part of the Independent JPEG Group's software.
shoaib_ahmed 0:791a779d6220 7 * For conditions of distribution and use, see the accompanying README file.
shoaib_ahmed 0:791a779d6220 8 *
shoaib_ahmed 0:791a779d6220 9 * This include file contains common declarations for the forward and
shoaib_ahmed 0:791a779d6220 10 * inverse DCT modules. These declarations are private to the DCT managers
shoaib_ahmed 0:791a779d6220 11 * (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms.
shoaib_ahmed 0:791a779d6220 12 * The individual DCT algorithms are kept in separate files to ease
shoaib_ahmed 0:791a779d6220 13 * machine-dependent tuning (e.g., assembly coding).
shoaib_ahmed 0:791a779d6220 14 */
shoaib_ahmed 0:791a779d6220 15
shoaib_ahmed 0:791a779d6220 16
shoaib_ahmed 0:791a779d6220 17 /*
shoaib_ahmed 0:791a779d6220 18 * A forward DCT routine is given a pointer to an input sample array and
shoaib_ahmed 0:791a779d6220 19 * a pointer to a work area of type DCTELEM[]; the DCT is to be performed
shoaib_ahmed 0:791a779d6220 20 * in-place in that buffer. Type DCTELEM is int for 8-bit samples, INT32
shoaib_ahmed 0:791a779d6220 21 * for 12-bit samples. (NOTE: Floating-point DCT implementations use an
shoaib_ahmed 0:791a779d6220 22 * array of type FAST_FLOAT, instead.)
shoaib_ahmed 0:791a779d6220 23 * The input data is to be fetched from the sample array starting at a
shoaib_ahmed 0:791a779d6220 24 * specified column. (Any row offset needed will be applied to the array
shoaib_ahmed 0:791a779d6220 25 * pointer before it is passed to the FDCT code.)
shoaib_ahmed 0:791a779d6220 26 * Note that the number of samples fetched by the FDCT routine is
shoaib_ahmed 0:791a779d6220 27 * DCT_h_scaled_size * DCT_v_scaled_size.
shoaib_ahmed 0:791a779d6220 28 * The DCT outputs are returned scaled up by a factor of 8; they therefore
shoaib_ahmed 0:791a779d6220 29 * have a range of +-8K for 8-bit data, +-128K for 12-bit data. This
shoaib_ahmed 0:791a779d6220 30 * convention improves accuracy in integer implementations and saves some
shoaib_ahmed 0:791a779d6220 31 * work in floating-point ones.
shoaib_ahmed 0:791a779d6220 32 * Quantization of the output coefficients is done by jcdctmgr.c.
shoaib_ahmed 0:791a779d6220 33 */
shoaib_ahmed 0:791a779d6220 34
shoaib_ahmed 0:791a779d6220 35 #if BITS_IN_JSAMPLE == 8
shoaib_ahmed 0:791a779d6220 36 typedef int DCTELEM; /* 16 or 32 bits is fine */
shoaib_ahmed 0:791a779d6220 37 #else
shoaib_ahmed 0:791a779d6220 38 typedef INT32 DCTELEM; /* must have 32 bits */
shoaib_ahmed 0:791a779d6220 39 #endif
shoaib_ahmed 0:791a779d6220 40
shoaib_ahmed 0:791a779d6220 41 typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data,
shoaib_ahmed 0:791a779d6220 42 JSAMPARRAY sample_data,
shoaib_ahmed 0:791a779d6220 43 JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 44 typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data,
shoaib_ahmed 0:791a779d6220 45 JSAMPARRAY sample_data,
shoaib_ahmed 0:791a779d6220 46 JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 47
shoaib_ahmed 0:791a779d6220 48
shoaib_ahmed 0:791a779d6220 49 /*
shoaib_ahmed 0:791a779d6220 50 * An inverse DCT routine is given a pointer to the input JBLOCK and a pointer
shoaib_ahmed 0:791a779d6220 51 * to an output sample array. The routine must dequantize the input data as
shoaib_ahmed 0:791a779d6220 52 * well as perform the IDCT; for dequantization, it uses the multiplier table
shoaib_ahmed 0:791a779d6220 53 * pointed to by compptr->dct_table. The output data is to be placed into the
shoaib_ahmed 0:791a779d6220 54 * sample array starting at a specified column. (Any row offset needed will
shoaib_ahmed 0:791a779d6220 55 * be applied to the array pointer before it is passed to the IDCT code.)
shoaib_ahmed 0:791a779d6220 56 * Note that the number of samples emitted by the IDCT routine is
shoaib_ahmed 0:791a779d6220 57 * DCT_h_scaled_size * DCT_v_scaled_size.
shoaib_ahmed 0:791a779d6220 58 */
shoaib_ahmed 0:791a779d6220 59
shoaib_ahmed 0:791a779d6220 60 /* typedef inverse_DCT_method_ptr is declared in jpegint.h */
shoaib_ahmed 0:791a779d6220 61
shoaib_ahmed 0:791a779d6220 62 /*
shoaib_ahmed 0:791a779d6220 63 * Each IDCT routine has its own ideas about the best dct_table element type.
shoaib_ahmed 0:791a779d6220 64 */
shoaib_ahmed 0:791a779d6220 65
shoaib_ahmed 0:791a779d6220 66 typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */
shoaib_ahmed 0:791a779d6220 67 #if BITS_IN_JSAMPLE == 8
shoaib_ahmed 0:791a779d6220 68 typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */
shoaib_ahmed 0:791a779d6220 69 #define IFAST_SCALE_BITS 2 /* fractional bits in scale factors */
shoaib_ahmed 0:791a779d6220 70 #else
shoaib_ahmed 0:791a779d6220 71 typedef INT32 IFAST_MULT_TYPE; /* need 32 bits for scaled quantizers */
shoaib_ahmed 0:791a779d6220 72 #define IFAST_SCALE_BITS 13 /* fractional bits in scale factors */
shoaib_ahmed 0:791a779d6220 73 #endif
shoaib_ahmed 0:791a779d6220 74 typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
shoaib_ahmed 0:791a779d6220 75
shoaib_ahmed 0:791a779d6220 76
shoaib_ahmed 0:791a779d6220 77 /*
shoaib_ahmed 0:791a779d6220 78 * Each IDCT routine is responsible for range-limiting its results and
shoaib_ahmed 0:791a779d6220 79 * converting them to unsigned form (0..MAXJSAMPLE). The raw outputs could
shoaib_ahmed 0:791a779d6220 80 * be quite far out of range if the input data is corrupt, so a bulletproof
shoaib_ahmed 0:791a779d6220 81 * range-limiting step is required. We use a mask-and-table-lookup method
shoaib_ahmed 0:791a779d6220 82 * to do the combined operations quickly, assuming that MAXJSAMPLE+1
shoaib_ahmed 0:791a779d6220 83 * is a power of 2. See the comments with prepare_range_limit_table
shoaib_ahmed 0:791a779d6220 84 * (in jdmaster.c) for more info.
shoaib_ahmed 0:791a779d6220 85 */
shoaib_ahmed 0:791a779d6220 86
shoaib_ahmed 0:791a779d6220 87 #define RANGE_MASK (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
shoaib_ahmed 0:791a779d6220 88 #define RANGE_CENTER (MAXJSAMPLE * 2 + 2)
shoaib_ahmed 0:791a779d6220 89 #define RANGE_SUBSET (RANGE_CENTER - CENTERJSAMPLE)
shoaib_ahmed 0:791a779d6220 90
shoaib_ahmed 0:791a779d6220 91 #define IDCT_range_limit(cinfo) ((cinfo)->sample_range_limit - RANGE_SUBSET)
shoaib_ahmed 0:791a779d6220 92
shoaib_ahmed 0:791a779d6220 93
shoaib_ahmed 0:791a779d6220 94 /* Short forms of external names for systems with brain-damaged linkers. */
shoaib_ahmed 0:791a779d6220 95
shoaib_ahmed 0:791a779d6220 96 #ifdef NEED_SHORT_EXTERNAL_NAMES
shoaib_ahmed 0:791a779d6220 97 #define jpeg_fdct_islow jFDislow
shoaib_ahmed 0:791a779d6220 98 #define jpeg_fdct_ifast jFDifast
shoaib_ahmed 0:791a779d6220 99 #define jpeg_fdct_float jFDfloat
shoaib_ahmed 0:791a779d6220 100 #define jpeg_fdct_7x7 jFD7x7
shoaib_ahmed 0:791a779d6220 101 #define jpeg_fdct_6x6 jFD6x6
shoaib_ahmed 0:791a779d6220 102 #define jpeg_fdct_5x5 jFD5x5
shoaib_ahmed 0:791a779d6220 103 #define jpeg_fdct_4x4 jFD4x4
shoaib_ahmed 0:791a779d6220 104 #define jpeg_fdct_3x3 jFD3x3
shoaib_ahmed 0:791a779d6220 105 #define jpeg_fdct_2x2 jFD2x2
shoaib_ahmed 0:791a779d6220 106 #define jpeg_fdct_1x1 jFD1x1
shoaib_ahmed 0:791a779d6220 107 #define jpeg_fdct_9x9 jFD9x9
shoaib_ahmed 0:791a779d6220 108 #define jpeg_fdct_10x10 jFD10x10
shoaib_ahmed 0:791a779d6220 109 #define jpeg_fdct_11x11 jFD11x11
shoaib_ahmed 0:791a779d6220 110 #define jpeg_fdct_12x12 jFD12x12
shoaib_ahmed 0:791a779d6220 111 #define jpeg_fdct_13x13 jFD13x13
shoaib_ahmed 0:791a779d6220 112 #define jpeg_fdct_14x14 jFD14x14
shoaib_ahmed 0:791a779d6220 113 #define jpeg_fdct_15x15 jFD15x15
shoaib_ahmed 0:791a779d6220 114 #define jpeg_fdct_16x16 jFD16x16
shoaib_ahmed 0:791a779d6220 115 #define jpeg_fdct_16x8 jFD16x8
shoaib_ahmed 0:791a779d6220 116 #define jpeg_fdct_14x7 jFD14x7
shoaib_ahmed 0:791a779d6220 117 #define jpeg_fdct_12x6 jFD12x6
shoaib_ahmed 0:791a779d6220 118 #define jpeg_fdct_10x5 jFD10x5
shoaib_ahmed 0:791a779d6220 119 #define jpeg_fdct_8x4 jFD8x4
shoaib_ahmed 0:791a779d6220 120 #define jpeg_fdct_6x3 jFD6x3
shoaib_ahmed 0:791a779d6220 121 #define jpeg_fdct_4x2 jFD4x2
shoaib_ahmed 0:791a779d6220 122 #define jpeg_fdct_2x1 jFD2x1
shoaib_ahmed 0:791a779d6220 123 #define jpeg_fdct_8x16 jFD8x16
shoaib_ahmed 0:791a779d6220 124 #define jpeg_fdct_7x14 jFD7x14
shoaib_ahmed 0:791a779d6220 125 #define jpeg_fdct_6x12 jFD6x12
shoaib_ahmed 0:791a779d6220 126 #define jpeg_fdct_5x10 jFD5x10
shoaib_ahmed 0:791a779d6220 127 #define jpeg_fdct_4x8 jFD4x8
shoaib_ahmed 0:791a779d6220 128 #define jpeg_fdct_3x6 jFD3x6
shoaib_ahmed 0:791a779d6220 129 #define jpeg_fdct_2x4 jFD2x4
shoaib_ahmed 0:791a779d6220 130 #define jpeg_fdct_1x2 jFD1x2
shoaib_ahmed 0:791a779d6220 131 #define jpeg_idct_islow jRDislow
shoaib_ahmed 0:791a779d6220 132 #define jpeg_idct_ifast jRDifast
shoaib_ahmed 0:791a779d6220 133 #define jpeg_idct_float jRDfloat
shoaib_ahmed 0:791a779d6220 134 #define jpeg_idct_7x7 jRD7x7
shoaib_ahmed 0:791a779d6220 135 #define jpeg_idct_6x6 jRD6x6
shoaib_ahmed 0:791a779d6220 136 #define jpeg_idct_5x5 jRD5x5
shoaib_ahmed 0:791a779d6220 137 #define jpeg_idct_4x4 jRD4x4
shoaib_ahmed 0:791a779d6220 138 #define jpeg_idct_3x3 jRD3x3
shoaib_ahmed 0:791a779d6220 139 #define jpeg_idct_2x2 jRD2x2
shoaib_ahmed 0:791a779d6220 140 #define jpeg_idct_1x1 jRD1x1
shoaib_ahmed 0:791a779d6220 141 #define jpeg_idct_9x9 jRD9x9
shoaib_ahmed 0:791a779d6220 142 #define jpeg_idct_10x10 jRD10x10
shoaib_ahmed 0:791a779d6220 143 #define jpeg_idct_11x11 jRD11x11
shoaib_ahmed 0:791a779d6220 144 #define jpeg_idct_12x12 jRD12x12
shoaib_ahmed 0:791a779d6220 145 #define jpeg_idct_13x13 jRD13x13
shoaib_ahmed 0:791a779d6220 146 #define jpeg_idct_14x14 jRD14x14
shoaib_ahmed 0:791a779d6220 147 #define jpeg_idct_15x15 jRD15x15
shoaib_ahmed 0:791a779d6220 148 #define jpeg_idct_16x16 jRD16x16
shoaib_ahmed 0:791a779d6220 149 #define jpeg_idct_16x8 jRD16x8
shoaib_ahmed 0:791a779d6220 150 #define jpeg_idct_14x7 jRD14x7
shoaib_ahmed 0:791a779d6220 151 #define jpeg_idct_12x6 jRD12x6
shoaib_ahmed 0:791a779d6220 152 #define jpeg_idct_10x5 jRD10x5
shoaib_ahmed 0:791a779d6220 153 #define jpeg_idct_8x4 jRD8x4
shoaib_ahmed 0:791a779d6220 154 #define jpeg_idct_6x3 jRD6x3
shoaib_ahmed 0:791a779d6220 155 #define jpeg_idct_4x2 jRD4x2
shoaib_ahmed 0:791a779d6220 156 #define jpeg_idct_2x1 jRD2x1
shoaib_ahmed 0:791a779d6220 157 #define jpeg_idct_8x16 jRD8x16
shoaib_ahmed 0:791a779d6220 158 #define jpeg_idct_7x14 jRD7x14
shoaib_ahmed 0:791a779d6220 159 #define jpeg_idct_6x12 jRD6x12
shoaib_ahmed 0:791a779d6220 160 #define jpeg_idct_5x10 jRD5x10
shoaib_ahmed 0:791a779d6220 161 #define jpeg_idct_4x8 jRD4x8
shoaib_ahmed 0:791a779d6220 162 #define jpeg_idct_3x6 jRD3x8
shoaib_ahmed 0:791a779d6220 163 #define jpeg_idct_2x4 jRD2x4
shoaib_ahmed 0:791a779d6220 164 #define jpeg_idct_1x2 jRD1x2
shoaib_ahmed 0:791a779d6220 165 #endif /* NEED_SHORT_EXTERNAL_NAMES */
shoaib_ahmed 0:791a779d6220 166
shoaib_ahmed 0:791a779d6220 167 /* Extern declarations for the forward and inverse DCT routines. */
shoaib_ahmed 0:791a779d6220 168
shoaib_ahmed 0:791a779d6220 169 EXTERN(void) jpeg_fdct_islow
shoaib_ahmed 0:791a779d6220 170 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 171 EXTERN(void) jpeg_fdct_ifast
shoaib_ahmed 0:791a779d6220 172 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 173 EXTERN(void) jpeg_fdct_float
shoaib_ahmed 0:791a779d6220 174 JPP((FAST_FLOAT * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 175 EXTERN(void) jpeg_fdct_7x7
shoaib_ahmed 0:791a779d6220 176 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 177 EXTERN(void) jpeg_fdct_6x6
shoaib_ahmed 0:791a779d6220 178 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 179 EXTERN(void) jpeg_fdct_5x5
shoaib_ahmed 0:791a779d6220 180 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 181 EXTERN(void) jpeg_fdct_4x4
shoaib_ahmed 0:791a779d6220 182 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 183 EXTERN(void) jpeg_fdct_3x3
shoaib_ahmed 0:791a779d6220 184 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 185 EXTERN(void) jpeg_fdct_2x2
shoaib_ahmed 0:791a779d6220 186 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 187 EXTERN(void) jpeg_fdct_1x1
shoaib_ahmed 0:791a779d6220 188 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 189 EXTERN(void) jpeg_fdct_9x9
shoaib_ahmed 0:791a779d6220 190 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 191 EXTERN(void) jpeg_fdct_10x10
shoaib_ahmed 0:791a779d6220 192 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 193 EXTERN(void) jpeg_fdct_11x11
shoaib_ahmed 0:791a779d6220 194 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 195 EXTERN(void) jpeg_fdct_12x12
shoaib_ahmed 0:791a779d6220 196 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 197 EXTERN(void) jpeg_fdct_13x13
shoaib_ahmed 0:791a779d6220 198 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 199 EXTERN(void) jpeg_fdct_14x14
shoaib_ahmed 0:791a779d6220 200 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 201 EXTERN(void) jpeg_fdct_15x15
shoaib_ahmed 0:791a779d6220 202 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 203 EXTERN(void) jpeg_fdct_16x16
shoaib_ahmed 0:791a779d6220 204 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 205 EXTERN(void) jpeg_fdct_16x8
shoaib_ahmed 0:791a779d6220 206 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 207 EXTERN(void) jpeg_fdct_14x7
shoaib_ahmed 0:791a779d6220 208 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 209 EXTERN(void) jpeg_fdct_12x6
shoaib_ahmed 0:791a779d6220 210 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 211 EXTERN(void) jpeg_fdct_10x5
shoaib_ahmed 0:791a779d6220 212 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 213 EXTERN(void) jpeg_fdct_8x4
shoaib_ahmed 0:791a779d6220 214 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 215 EXTERN(void) jpeg_fdct_6x3
shoaib_ahmed 0:791a779d6220 216 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 217 EXTERN(void) jpeg_fdct_4x2
shoaib_ahmed 0:791a779d6220 218 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 219 EXTERN(void) jpeg_fdct_2x1
shoaib_ahmed 0:791a779d6220 220 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 221 EXTERN(void) jpeg_fdct_8x16
shoaib_ahmed 0:791a779d6220 222 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 223 EXTERN(void) jpeg_fdct_7x14
shoaib_ahmed 0:791a779d6220 224 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 225 EXTERN(void) jpeg_fdct_6x12
shoaib_ahmed 0:791a779d6220 226 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 227 EXTERN(void) jpeg_fdct_5x10
shoaib_ahmed 0:791a779d6220 228 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 229 EXTERN(void) jpeg_fdct_4x8
shoaib_ahmed 0:791a779d6220 230 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 231 EXTERN(void) jpeg_fdct_3x6
shoaib_ahmed 0:791a779d6220 232 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 233 EXTERN(void) jpeg_fdct_2x4
shoaib_ahmed 0:791a779d6220 234 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 235 EXTERN(void) jpeg_fdct_1x2
shoaib_ahmed 0:791a779d6220 236 JPP((DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col));
shoaib_ahmed 0:791a779d6220 237
shoaib_ahmed 0:791a779d6220 238 EXTERN(void) jpeg_idct_islow
shoaib_ahmed 0:791a779d6220 239 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 240 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 241 EXTERN(void) jpeg_idct_ifast
shoaib_ahmed 0:791a779d6220 242 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 243 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 244 EXTERN(void) jpeg_idct_float
shoaib_ahmed 0:791a779d6220 245 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 246 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 247 EXTERN(void) jpeg_idct_7x7
shoaib_ahmed 0:791a779d6220 248 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 249 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 250 EXTERN(void) jpeg_idct_6x6
shoaib_ahmed 0:791a779d6220 251 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 252 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 253 EXTERN(void) jpeg_idct_5x5
shoaib_ahmed 0:791a779d6220 254 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 255 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 256 EXTERN(void) jpeg_idct_4x4
shoaib_ahmed 0:791a779d6220 257 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 258 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 259 EXTERN(void) jpeg_idct_3x3
shoaib_ahmed 0:791a779d6220 260 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 261 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 262 EXTERN(void) jpeg_idct_2x2
shoaib_ahmed 0:791a779d6220 263 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 264 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 265 EXTERN(void) jpeg_idct_1x1
shoaib_ahmed 0:791a779d6220 266 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 267 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 268 EXTERN(void) jpeg_idct_9x9
shoaib_ahmed 0:791a779d6220 269 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 270 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 271 EXTERN(void) jpeg_idct_10x10
shoaib_ahmed 0:791a779d6220 272 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 273 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 274 EXTERN(void) jpeg_idct_11x11
shoaib_ahmed 0:791a779d6220 275 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 276 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 277 EXTERN(void) jpeg_idct_12x12
shoaib_ahmed 0:791a779d6220 278 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 279 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 280 EXTERN(void) jpeg_idct_13x13
shoaib_ahmed 0:791a779d6220 281 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 282 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 283 EXTERN(void) jpeg_idct_14x14
shoaib_ahmed 0:791a779d6220 284 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 285 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 286 EXTERN(void) jpeg_idct_15x15
shoaib_ahmed 0:791a779d6220 287 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 288 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 289 EXTERN(void) jpeg_idct_16x16
shoaib_ahmed 0:791a779d6220 290 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 291 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 292 EXTERN(void) jpeg_idct_16x8
shoaib_ahmed 0:791a779d6220 293 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 294 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 295 EXTERN(void) jpeg_idct_14x7
shoaib_ahmed 0:791a779d6220 296 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 297 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 298 EXTERN(void) jpeg_idct_12x6
shoaib_ahmed 0:791a779d6220 299 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 300 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 301 EXTERN(void) jpeg_idct_10x5
shoaib_ahmed 0:791a779d6220 302 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 303 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 304 EXTERN(void) jpeg_idct_8x4
shoaib_ahmed 0:791a779d6220 305 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 306 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 307 EXTERN(void) jpeg_idct_6x3
shoaib_ahmed 0:791a779d6220 308 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 309 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 310 EXTERN(void) jpeg_idct_4x2
shoaib_ahmed 0:791a779d6220 311 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 312 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 313 EXTERN(void) jpeg_idct_2x1
shoaib_ahmed 0:791a779d6220 314 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 315 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 316 EXTERN(void) jpeg_idct_8x16
shoaib_ahmed 0:791a779d6220 317 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 318 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 319 EXTERN(void) jpeg_idct_7x14
shoaib_ahmed 0:791a779d6220 320 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 321 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 322 EXTERN(void) jpeg_idct_6x12
shoaib_ahmed 0:791a779d6220 323 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 324 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 325 EXTERN(void) jpeg_idct_5x10
shoaib_ahmed 0:791a779d6220 326 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 327 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 328 EXTERN(void) jpeg_idct_4x8
shoaib_ahmed 0:791a779d6220 329 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 330 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 331 EXTERN(void) jpeg_idct_3x6
shoaib_ahmed 0:791a779d6220 332 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 333 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 334 EXTERN(void) jpeg_idct_2x4
shoaib_ahmed 0:791a779d6220 335 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 336 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 337 EXTERN(void) jpeg_idct_1x2
shoaib_ahmed 0:791a779d6220 338 JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
shoaib_ahmed 0:791a779d6220 339 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
shoaib_ahmed 0:791a779d6220 340
shoaib_ahmed 0:791a779d6220 341
shoaib_ahmed 0:791a779d6220 342 /*
shoaib_ahmed 0:791a779d6220 343 * Macros for handling fixed-point arithmetic; these are used by many
shoaib_ahmed 0:791a779d6220 344 * but not all of the DCT/IDCT modules.
shoaib_ahmed 0:791a779d6220 345 *
shoaib_ahmed 0:791a779d6220 346 * All values are expected to be of type INT32.
shoaib_ahmed 0:791a779d6220 347 * Fractional constants are scaled left by CONST_BITS bits.
shoaib_ahmed 0:791a779d6220 348 * CONST_BITS is defined within each module using these macros,
shoaib_ahmed 0:791a779d6220 349 * and may differ from one module to the next.
shoaib_ahmed 0:791a779d6220 350 */
shoaib_ahmed 0:791a779d6220 351
shoaib_ahmed 0:791a779d6220 352 #define ONE ((INT32) 1)
shoaib_ahmed 0:791a779d6220 353 #define CONST_SCALE (ONE << CONST_BITS)
shoaib_ahmed 0:791a779d6220 354
shoaib_ahmed 0:791a779d6220 355 /* Convert a positive real constant to an integer scaled by CONST_SCALE.
shoaib_ahmed 0:791a779d6220 356 * Caution: some C compilers fail to reduce "FIX(constant)" at compile time,
shoaib_ahmed 0:791a779d6220 357 * thus causing a lot of useless floating-point operations at run time.
shoaib_ahmed 0:791a779d6220 358 */
shoaib_ahmed 0:791a779d6220 359
shoaib_ahmed 0:791a779d6220 360 #define FIX(x) ((INT32) ((x) * CONST_SCALE + 0.5))
shoaib_ahmed 0:791a779d6220 361
shoaib_ahmed 0:791a779d6220 362 /* Descale and correctly round an INT32 value that's scaled by N bits.
shoaib_ahmed 0:791a779d6220 363 * We assume RIGHT_SHIFT rounds towards minus infinity, so adding
shoaib_ahmed 0:791a779d6220 364 * the fudge factor is correct for either sign of X.
shoaib_ahmed 0:791a779d6220 365 */
shoaib_ahmed 0:791a779d6220 366
shoaib_ahmed 0:791a779d6220 367 #define DESCALE(x,n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
shoaib_ahmed 0:791a779d6220 368
shoaib_ahmed 0:791a779d6220 369 /* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
shoaib_ahmed 0:791a779d6220 370 * This macro is used only when the two inputs will actually be no more than
shoaib_ahmed 0:791a779d6220 371 * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
shoaib_ahmed 0:791a779d6220 372 * full 32x32 multiply. This provides a useful speedup on many machines.
shoaib_ahmed 0:791a779d6220 373 * Unfortunately there is no way to specify a 16x16->32 multiply portably
shoaib_ahmed 0:791a779d6220 374 * in C, but some C compilers will do the right thing if you provide the
shoaib_ahmed 0:791a779d6220 375 * correct combination of casts.
shoaib_ahmed 0:791a779d6220 376 */
shoaib_ahmed 0:791a779d6220 377
shoaib_ahmed 0:791a779d6220 378 #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
shoaib_ahmed 0:791a779d6220 379 #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT16) (const)))
shoaib_ahmed 0:791a779d6220 380 #endif
shoaib_ahmed 0:791a779d6220 381 #ifdef SHORTxLCONST_32 /* known to work with Microsoft C 6.0 */
shoaib_ahmed 0:791a779d6220 382 #define MULTIPLY16C16(var,const) (((INT16) (var)) * ((INT32) (const)))
shoaib_ahmed 0:791a779d6220 383 #endif
shoaib_ahmed 0:791a779d6220 384
shoaib_ahmed 0:791a779d6220 385 #ifndef MULTIPLY16C16 /* default definition */
shoaib_ahmed 0:791a779d6220 386 #define MULTIPLY16C16(var,const) ((var) * (const))
shoaib_ahmed 0:791a779d6220 387 #endif
shoaib_ahmed 0:791a779d6220 388
shoaib_ahmed 0:791a779d6220 389 /* Same except both inputs are variables. */
shoaib_ahmed 0:791a779d6220 390
shoaib_ahmed 0:791a779d6220 391 #ifdef SHORTxSHORT_32 /* may work if 'int' is 32 bits */
shoaib_ahmed 0:791a779d6220 392 #define MULTIPLY16V16(var1,var2) (((INT16) (var1)) * ((INT16) (var2)))
shoaib_ahmed 0:791a779d6220 393 #endif
shoaib_ahmed 0:791a779d6220 394
shoaib_ahmed 0:791a779d6220 395 #ifndef MULTIPLY16V16 /* default definition */
shoaib_ahmed 0:791a779d6220 396 #define MULTIPLY16V16(var1,var2) ((var1) * (var2))
shoaib_ahmed 0:791a779d6220 397 #endif
shoaib_ahmed 0:791a779d6220 398
shoaib_ahmed 0:791a779d6220 399 /* Like RIGHT_SHIFT, but applies to a DCTELEM.
shoaib_ahmed 0:791a779d6220 400 * We assume that int right shift is unsigned if INT32 right shift is.
shoaib_ahmed 0:791a779d6220 401 */
shoaib_ahmed 0:791a779d6220 402
shoaib_ahmed 0:791a779d6220 403 #ifdef RIGHT_SHIFT_IS_UNSIGNED
shoaib_ahmed 0:791a779d6220 404 #define ISHIFT_TEMPS DCTELEM ishift_temp;
shoaib_ahmed 0:791a779d6220 405 #if BITS_IN_JSAMPLE == 8
shoaib_ahmed 0:791a779d6220 406 #define DCTELEMBITS 16 /* DCTELEM may be 16 or 32 bits */
shoaib_ahmed 0:791a779d6220 407 #else
shoaib_ahmed 0:791a779d6220 408 #define DCTELEMBITS 32 /* DCTELEM must be 32 bits */
shoaib_ahmed 0:791a779d6220 409 #endif
shoaib_ahmed 0:791a779d6220 410 #define IRIGHT_SHIFT(x,shft) \
shoaib_ahmed 0:791a779d6220 411 ((ishift_temp = (x)) < 0 ? \
shoaib_ahmed 0:791a779d6220 412 (ishift_temp >> (shft)) | ((~((DCTELEM) 0)) << (DCTELEMBITS-(shft))) : \
shoaib_ahmed 0:791a779d6220 413 (ishift_temp >> (shft)))
shoaib_ahmed 0:791a779d6220 414 #else
shoaib_ahmed 0:791a779d6220 415 #define ISHIFT_TEMPS
shoaib_ahmed 0:791a779d6220 416 #define IRIGHT_SHIFT(x,shft) ((x) >> (shft))
shoaib_ahmed 0:791a779d6220 417 #endif