Kerry Martin / RA8875

KSM edits to RA8875

Dependents:   Liz_Test_Code

GraphicsDisplayJPEG.cpp@120:be2aaa3adf72, 2016-05-16 (annotated)

Committer:
WiredHome
Date:
Mon May 16 22:31:13 2016 +0000
Revision:
120:be2aaa3adf72
Parent:
119:d129b798f82f
Child:
121:6bc4911f5e55
not working - added instrumentation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 115:c9862fd0c689 1 /*----------------------------------------------------------------------------/
WiredHome 115:c9862fd0c689 2 / TJpgDec - Tiny JPEG Decompressor R0.01b (C)ChaN, 2012
WiredHome 115:c9862fd0c689 3 /-----------------------------------------------------------------------------/
WiredHome 115:c9862fd0c689 4 / The TJpgDec is a generic JPEG decompressor module for tiny embedded systems.
WiredHome 115:c9862fd0c689 5 / This is a free software that opened for education, research and commercial
WiredHome 115:c9862fd0c689 6 / developments under license policy of following terms.
WiredHome 115:c9862fd0c689 7 /
WiredHome 115:c9862fd0c689 8 / Copyright (C) 2012, ChaN, all right reserved.
WiredHome 115:c9862fd0c689 9 /
WiredHome 115:c9862fd0c689 10 / * The TJpgDec module is a free software and there is NO WARRANTY.
WiredHome 115:c9862fd0c689 11 / * No restriction on use. You can use, modify and redistribute it for
WiredHome 115:c9862fd0c689 12 / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
WiredHome 115:c9862fd0c689 13 / * Redistributions of source code must retain the above copyright notice.
WiredHome 115:c9862fd0c689 14 /
WiredHome 115:c9862fd0c689 15 /-----------------------------------------------------------------------------/
WiredHome 115:c9862fd0c689 16 / Oct 04,'11 R0.01 First release.
WiredHome 115:c9862fd0c689 17 / Feb 19,'12 R0.01a Fixed decompression fails when scan starts with an escape seq.
WiredHome 115:c9862fd0c689 18 / Sep 03,'12 R0.01b Added JD_TBLCLIP option.
WiredHome 115:c9862fd0c689 19 /----------------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 20
WiredHome 115:c9862fd0c689 21 #include "mbed.h"
WiredHome 115:c9862fd0c689 22
WiredHome 115:c9862fd0c689 23 #include "GraphicsDisplay.h"
WiredHome 115:c9862fd0c689 24
WiredHome 115:c9862fd0c689 25 #define DEBUG "JPEG"
WiredHome 115:c9862fd0c689 26 // ...
WiredHome 115:c9862fd0c689 27 // INFO("Stuff to show %d", var); // new-line is automatically appended
WiredHome 115:c9862fd0c689 28 //
WiredHome 115:c9862fd0c689 29 #if (defined(DEBUG) && !defined(TARGET_LPC11U24))
WiredHome 115:c9862fd0c689 30 #define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 115:c9862fd0c689 31 #define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 115:c9862fd0c689 32 #define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 115:c9862fd0c689 33 static void HexDump(const char * title, const uint8_t * p, int count)
WiredHome 115:c9862fd0c689 34 {
WiredHome 115:c9862fd0c689 35 int i;
WiredHome 115:c9862fd0c689 36 char buf[100] = "0000: ";
WiredHome 115:c9862fd0c689 37
WiredHome 115:c9862fd0c689 38 if (*title)
WiredHome 115:c9862fd0c689 39 INFO("%s", title);
WiredHome 115:c9862fd0c689 40 for (i=0; i<count; ) {
WiredHome 115:c9862fd0c689 41 sprintf(buf + strlen(buf), "%02X ", *(p+i));
WiredHome 115:c9862fd0c689 42 if ((++i & 0x0F) == 0x00) {
WiredHome 115:c9862fd0c689 43 INFO("%s", buf);
WiredHome 115:c9862fd0c689 44 if (i < count)
WiredHome 115:c9862fd0c689 45 sprintf(buf, "%04X: ", i);
WiredHome 115:c9862fd0c689 46 else
WiredHome 115:c9862fd0c689 47 buf[0] = '\0';
WiredHome 115:c9862fd0c689 48 }
WiredHome 115:c9862fd0c689 49 }
WiredHome 115:c9862fd0c689 50 if (strlen(buf))
WiredHome 115:c9862fd0c689 51 INFO("%s", buf);
WiredHome 115:c9862fd0c689 52 }
WiredHome 115:c9862fd0c689 53 #else
WiredHome 115:c9862fd0c689 54 #define INFO(x, ...)
WiredHome 115:c9862fd0c689 55 #define WARN(x, ...)
WiredHome 115:c9862fd0c689 56 #define ERR(x, ...)
WiredHome 115:c9862fd0c689 57 #define HexDump(a, b, c)
WiredHome 115:c9862fd0c689 58 #endif
WiredHome 115:c9862fd0c689 59
WiredHome 115:c9862fd0c689 60
WiredHome 115:c9862fd0c689 61 /*-----------------------------------------------*/
WiredHome 115:c9862fd0c689 62 /* Zigzag-order to raster-order conversion table */
WiredHome 115:c9862fd0c689 63 /*-----------------------------------------------*/
WiredHome 115:c9862fd0c689 64
WiredHome 115:c9862fd0c689 65 #define ZIG(n) Zig[n]
WiredHome 115:c9862fd0c689 66
WiredHome 115:c9862fd0c689 67 static
WiredHome 115:c9862fd0c689 68 const uint8_t Zig[64] = { /* Zigzag-order to raster-order conversion table */
WiredHome 115:c9862fd0c689 69 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5,
WiredHome 115:c9862fd0c689 70 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28,
WiredHome 115:c9862fd0c689 71 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51,
WiredHome 115:c9862fd0c689 72 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63
WiredHome 115:c9862fd0c689 73 };
WiredHome 115:c9862fd0c689 74
WiredHome 115:c9862fd0c689 75
WiredHome 115:c9862fd0c689 76
WiredHome 115:c9862fd0c689 77 /*-------------------------------------------------*/
WiredHome 115:c9862fd0c689 78 /* Input scale factor of Arai algorithm */
WiredHome 115:c9862fd0c689 79 /* (scaled up 16 bits for fixed point operations) */
WiredHome 115:c9862fd0c689 80 /*-------------------------------------------------*/
WiredHome 115:c9862fd0c689 81
WiredHome 115:c9862fd0c689 82 #define IPSF(n) Ipsf[n]
WiredHome 115:c9862fd0c689 83
WiredHome 115:c9862fd0c689 84 static
WiredHome 115:c9862fd0c689 85 const uint16_t Ipsf[64] = { /* See also aa_idct.png */
WiredHome 115:c9862fd0c689 86 (uint16_t)(1.00000*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.17588*8192), (uint16_t)(1.00000*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.27590*8192),
WiredHome 115:c9862fd0c689 87 (uint16_t)(1.38704*8192), (uint16_t)(1.92388*8192), (uint16_t)(1.81226*8192), (uint16_t)(1.63099*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.08979*8192), (uint16_t)(0.75066*8192), (uint16_t)(0.38268*8192),
WiredHome 115:c9862fd0c689 88 (uint16_t)(1.30656*8192), (uint16_t)(1.81226*8192), (uint16_t)(1.70711*8192), (uint16_t)(1.53636*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.02656*8192), (uint16_t)(0.70711*8192), (uint16_t)(0.36048*8192),
WiredHome 115:c9862fd0c689 89 (uint16_t)(1.17588*8192), (uint16_t)(1.63099*8192), (uint16_t)(1.53636*8192), (uint16_t)(1.38268*8192), (uint16_t)(1.17588*8192), (uint16_t)(0.92388*8192), (uint16_t)(0.63638*8192), (uint16_t)(0.32442*8192),
WiredHome 115:c9862fd0c689 90 (uint16_t)(1.00000*8192), (uint16_t)(1.38704*8192), (uint16_t)(1.30656*8192), (uint16_t)(1.17588*8192), (uint16_t)(1.00000*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.27590*8192),
WiredHome 115:c9862fd0c689 91 (uint16_t)(0.78570*8192), (uint16_t)(1.08979*8192), (uint16_t)(1.02656*8192), (uint16_t)(0.92388*8192), (uint16_t)(0.78570*8192), (uint16_t)(0.61732*8192), (uint16_t)(0.42522*8192), (uint16_t)(0.21677*8192),
WiredHome 115:c9862fd0c689 92 (uint16_t)(0.54120*8192), (uint16_t)(0.75066*8192), (uint16_t)(0.70711*8192), (uint16_t)(0.63638*8192), (uint16_t)(0.54120*8192), (uint16_t)(0.42522*8192), (uint16_t)(0.29290*8192), (uint16_t)(0.14932*8192),
WiredHome 115:c9862fd0c689 93 (uint16_t)(0.27590*8192), (uint16_t)(0.38268*8192), (uint16_t)(0.36048*8192), (uint16_t)(0.32442*8192), (uint16_t)(0.27590*8192), (uint16_t)(0.21678*8192), (uint16_t)(0.14932*8192), (uint16_t)(0.07612*8192)
WiredHome 115:c9862fd0c689 94 };
WiredHome 115:c9862fd0c689 95
WiredHome 115:c9862fd0c689 96
WiredHome 115:c9862fd0c689 97
WiredHome 115:c9862fd0c689 98 /*---------------------------------------------*/
WiredHome 115:c9862fd0c689 99 /* Conversion table for fast clipping process */
WiredHome 115:c9862fd0c689 100 /*---------------------------------------------*/
WiredHome 115:c9862fd0c689 101
WiredHome 115:c9862fd0c689 102 #if JD_TBLCLIP
WiredHome 115:c9862fd0c689 103
WiredHome 115:c9862fd0c689 104 #define BYTECLIP(v) Clip8[(uint16_t)(v) & 0x3FF]
WiredHome 115:c9862fd0c689 105
WiredHome 115:c9862fd0c689 106 static
WiredHome 115:c9862fd0c689 107 const uint8_t Clip8[1024] = {
WiredHome 115:c9862fd0c689 108 /* 0..255 */
WiredHome 115:c9862fd0c689 109 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
WiredHome 115:c9862fd0c689 110 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
WiredHome 115:c9862fd0c689 111 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
WiredHome 115:c9862fd0c689 112 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
WiredHome 115:c9862fd0c689 113 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
WiredHome 115:c9862fd0c689 114 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
WiredHome 115:c9862fd0c689 115 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
WiredHome 115:c9862fd0c689 116 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255,
WiredHome 115:c9862fd0c689 117 /* 256..511 */
WiredHome 115:c9862fd0c689 118 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 119 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 120 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 121 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 122 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 123 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 124 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 125 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
WiredHome 115:c9862fd0c689 126 /* -512..-257 */
WiredHome 115:c9862fd0c689 127 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 128 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 130 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 131 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 132 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 133 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 134 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 135 /* -256..-1 */
WiredHome 115:c9862fd0c689 136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
WiredHome 115:c9862fd0c689 143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
WiredHome 115:c9862fd0c689 144 };
WiredHome 115:c9862fd0c689 145
WiredHome 115:c9862fd0c689 146 #else /* JD_TBLCLIP */
WiredHome 115:c9862fd0c689 147
WiredHome 115:c9862fd0c689 148 inline
WiredHome 115:c9862fd0c689 149 uint8_t BYTECLIP (
WiredHome 115:c9862fd0c689 150 int16_t val
WiredHome 115:c9862fd0c689 151 )
WiredHome 115:c9862fd0c689 152 {
WiredHome 115:c9862fd0c689 153 if (val < 0) val = 0;
WiredHome 115:c9862fd0c689 154 if (val > 255) val = 255;
WiredHome 115:c9862fd0c689 155
WiredHome 115:c9862fd0c689 156 return (uint8_t)val;
WiredHome 115:c9862fd0c689 157 }
WiredHome 115:c9862fd0c689 158
WiredHome 115:c9862fd0c689 159 #endif
WiredHome 115:c9862fd0c689 160
WiredHome 115:c9862fd0c689 161
WiredHome 115:c9862fd0c689 162
WiredHome 115:c9862fd0c689 163 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 164 /* Allocate a memory block from memory pool */
WiredHome 115:c9862fd0c689 165 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 166
WiredHome 115:c9862fd0c689 167 static
WiredHome 115:c9862fd0c689 168 void* alloc_pool ( /* Pointer to allocated memory block (NULL:no memory available) */
WiredHome 115:c9862fd0c689 169 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 170 uint16_t nd /* Number of bytes to allocate */
WiredHome 115:c9862fd0c689 171 )
WiredHome 115:c9862fd0c689 172 {
WiredHome 115:c9862fd0c689 173 char *rp = 0;
WiredHome 115:c9862fd0c689 174
WiredHome 115:c9862fd0c689 175 INFO("alloc_pool(%p,%d) %p:%d", jd, nd, jd->pool, jd->sz_pool);
WiredHome 115:c9862fd0c689 176 nd = (nd + 3) & ~3; /* Align block size to the word boundary */
WiredHome 115:c9862fd0c689 177
WiredHome 115:c9862fd0c689 178 if (jd->sz_pool >= nd) {
WiredHome 115:c9862fd0c689 179 jd->sz_pool -= nd;
WiredHome 115:c9862fd0c689 180 rp = (char*)jd->pool; /* Get start of available memory pool */
WiredHome 115:c9862fd0c689 181 jd->pool = (void*)(rp + nd); /* Allocate requierd bytes */
WiredHome 120:be2aaa3adf72 182 //INFO("jd->pool %p", jd->pool);
WiredHome 115:c9862fd0c689 183 }
WiredHome 115:c9862fd0c689 184 INFO("rp %p", rp);
WiredHome 115:c9862fd0c689 185 return (void*)rp; /* Return allocated memory block (NULL:no memory to allocate) */
WiredHome 115:c9862fd0c689 186 }
WiredHome 115:c9862fd0c689 187
WiredHome 115:c9862fd0c689 188
WiredHome 115:c9862fd0c689 189
WiredHome 115:c9862fd0c689 190
WiredHome 115:c9862fd0c689 191 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 192 /* Create de-quantization and prescaling tables with a DQT segment */
WiredHome 115:c9862fd0c689 193 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 194
WiredHome 115:c9862fd0c689 195 static
WiredHome 115:c9862fd0c689 196 uint16_t create_qt_tbl ( /* 0:OK, !0:Failed */
WiredHome 115:c9862fd0c689 197 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 198 const uint8_t * data, /* Pointer to the quantizer tables */
WiredHome 115:c9862fd0c689 199 uint16_t ndata /* Size of input data */
WiredHome 115:c9862fd0c689 200 )
WiredHome 115:c9862fd0c689 201 {
WiredHome 115:c9862fd0c689 202 uint16_t i;
WiredHome 115:c9862fd0c689 203 uint8_t d, z;
WiredHome 115:c9862fd0c689 204 int32_t *pb;
WiredHome 115:c9862fd0c689 205
WiredHome 120:be2aaa3adf72 206 INFO("create qt table (%p,%p,%d)", jd, data, ndata);
WiredHome 120:be2aaa3adf72 207 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 115:c9862fd0c689 208 while (ndata) { /* Process all tables in the segment */
WiredHome 115:c9862fd0c689 209 if (ndata < 65) return JDR_FMT1; /* Err: table size is unaligned */
WiredHome 115:c9862fd0c689 210 ndata -= 65;
WiredHome 115:c9862fd0c689 211 d = *data++; /* Get table property */
WiredHome 115:c9862fd0c689 212 if (d & 0xF0) return JDR_FMT1; /* Err: not 8-bit resolution */
WiredHome 115:c9862fd0c689 213 i = d & 3; /* Get table ID */
WiredHome 115:c9862fd0c689 214 pb = (int32_t *)alloc_pool(jd, 64 * sizeof (int32_t));/* Allocate a memory block for the table */
WiredHome 115:c9862fd0c689 215 if (!pb) return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 216 jd->qttbl[i] = pb; /* Register the table */
WiredHome 115:c9862fd0c689 217 for (i = 0; i < 64; i++) { /* Load the table */
WiredHome 115:c9862fd0c689 218 z = ZIG(i); /* Zigzag-order to raster-order conversion */
WiredHome 115:c9862fd0c689 219 pb[z] = (int32_t)((uint32_t)*data++ * IPSF(z)); /* Apply scale factor of Arai algorithm to the de-quantizers */
WiredHome 115:c9862fd0c689 220 }
WiredHome 115:c9862fd0c689 221 }
WiredHome 115:c9862fd0c689 222
WiredHome 115:c9862fd0c689 223 return JDR_OK;
WiredHome 115:c9862fd0c689 224 }
WiredHome 115:c9862fd0c689 225
WiredHome 115:c9862fd0c689 226
WiredHome 115:c9862fd0c689 227
WiredHome 115:c9862fd0c689 228
WiredHome 115:c9862fd0c689 229 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 230 /* Create huffman code tables with a DHT segment */
WiredHome 115:c9862fd0c689 231 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 232
WiredHome 115:c9862fd0c689 233 static
WiredHome 115:c9862fd0c689 234 uint16_t create_huffman_tbl ( /* 0:OK, !0:Failed */
WiredHome 115:c9862fd0c689 235 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 236 const uint8_t * data, /* Pointer to the packed huffman tables */
WiredHome 115:c9862fd0c689 237 uint16_t ndata /* Size of input data */
WiredHome 115:c9862fd0c689 238 )
WiredHome 115:c9862fd0c689 239 {
WiredHome 115:c9862fd0c689 240 uint16_t i, j, b, np, cls, num;
WiredHome 115:c9862fd0c689 241 uint8_t d, *pb, *pd;
WiredHome 115:c9862fd0c689 242 uint16_t hc, *ph;
WiredHome 115:c9862fd0c689 243
WiredHome 117:6710b8e196f0 244 INFO("create_huffman_tbl(%p,%p,%d)", jd, data, ndata);
WiredHome 117:6710b8e196f0 245 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 115:c9862fd0c689 246 while (ndata) { /* Process all tables in the segment */
WiredHome 115:c9862fd0c689 247 if (ndata < 17) return JDR_FMT1; /* Err: wrong data size */
WiredHome 115:c9862fd0c689 248 ndata -= 17;
WiredHome 115:c9862fd0c689 249 d = *data++; /* Get table number and class */
WiredHome 115:c9862fd0c689 250 cls = (d >> 4); num = d & 0x0F; /* class = dc(0)/ac(1), table number = 0/1 */
WiredHome 115:c9862fd0c689 251 if (d & 0xEE) return JDR_FMT1; /* Err: invalid class/number */
WiredHome 115:c9862fd0c689 252 pb = (uint8_t *)alloc_pool(jd, 16); /* Allocate a memory block for the bit distribution table */
WiredHome 115:c9862fd0c689 253 if (!pb) {
WiredHome 115:c9862fd0c689 254 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 255 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 256 }
WiredHome 115:c9862fd0c689 257 jd->huffbits[num][cls] = pb;
WiredHome 115:c9862fd0c689 258 for (np = i = 0; i < 16; i++) { /* Load number of patterns for 1 to 16-bit code */
WiredHome 115:c9862fd0c689 259 pb[i] = b = *data++;
WiredHome 115:c9862fd0c689 260 np += b; /* Get sum of code words for each code */
WiredHome 115:c9862fd0c689 261 }
WiredHome 115:c9862fd0c689 262
WiredHome 115:c9862fd0c689 263 ph = (uint16_t *)alloc_pool(jd, np * sizeof (uint16_t));/* Allocate a memory block for the code word table */
WiredHome 115:c9862fd0c689 264 if (!ph) {
WiredHome 115:c9862fd0c689 265 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 266 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 267 }
WiredHome 118:34eb0b64fc61 268 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 269 jd->huffcode[num][cls] = ph;
WiredHome 118:34eb0b64fc61 270 //INFO("jd->pool: %p, %p", jd->pool, ph);
WiredHome 115:c9862fd0c689 271 hc = 0;
WiredHome 115:c9862fd0c689 272 for (j = i = 0; i < 16; i++) { /* Re-build huffman code word table */
WiredHome 115:c9862fd0c689 273 b = pb[i];
WiredHome 115:c9862fd0c689 274 while (b--) ph[j++] = hc++;
WiredHome 115:c9862fd0c689 275 hc <<= 1;
WiredHome 115:c9862fd0c689 276 INFO("jd->pool: %d: %p, %p", i, jd->pool, ph);
WiredHome 115:c9862fd0c689 277 }
WiredHome 118:34eb0b64fc61 278 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 279
WiredHome 115:c9862fd0c689 280 if (ndata < np) return JDR_FMT1; /* Err: wrong data size */
WiredHome 115:c9862fd0c689 281 ndata -= np;
WiredHome 118:34eb0b64fc61 282 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 283 pd = (uint8_t *)alloc_pool(jd, np); /* Allocate a memory block for the decoded data */
WiredHome 118:34eb0b64fc61 284 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 285 if (!pd) {
WiredHome 115:c9862fd0c689 286 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 287 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 288 }
WiredHome 115:c9862fd0c689 289 jd->huffdata[num][cls] = pd;
WiredHome 115:c9862fd0c689 290 for (i = 0; i < np; i++) { /* Load decoded data corresponds to each code ward */
WiredHome 115:c9862fd0c689 291 d = *data++;
WiredHome 115:c9862fd0c689 292 if (!cls && d > 11) return JDR_FMT1;
WiredHome 115:c9862fd0c689 293 *pd++ = d;
WiredHome 115:c9862fd0c689 294 }
WiredHome 115:c9862fd0c689 295 }
WiredHome 115:c9862fd0c689 296
WiredHome 115:c9862fd0c689 297 return JDR_OK;
WiredHome 115:c9862fd0c689 298 }
WiredHome 115:c9862fd0c689 299
WiredHome 115:c9862fd0c689 300
WiredHome 115:c9862fd0c689 301
WiredHome 115:c9862fd0c689 302
WiredHome 115:c9862fd0c689 303 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 304 /* Extract N bits from input stream */
WiredHome 115:c9862fd0c689 305 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 306
WiredHome 115:c9862fd0c689 307 int16_t GraphicsDisplay::bitext ( /* >=0: extracted data, <0: error code */
WiredHome 115:c9862fd0c689 308 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 309 uint16_t nbit /* Number of bits to extract (1 to 11) */
WiredHome 115:c9862fd0c689 310 )
WiredHome 115:c9862fd0c689 311 {
WiredHome 115:c9862fd0c689 312 uint8_t msk, s, *dp;
WiredHome 115:c9862fd0c689 313 uint16_t dc, v, f;
WiredHome 115:c9862fd0c689 314
WiredHome 115:c9862fd0c689 315
WiredHome 115:c9862fd0c689 316 msk = jd->dmsk; dc = jd->dctr; dp = jd->dptr; /* Bit mask, number of data available, read ptr */
WiredHome 115:c9862fd0c689 317 s = *dp; v = f = 0;
WiredHome 115:c9862fd0c689 318 do {
WiredHome 115:c9862fd0c689 319 if (!msk) { /* Next byte? */
WiredHome 115:c9862fd0c689 320 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 321 dp = jd->inbuf; /* Top of input buffer */
WiredHome 115:c9862fd0c689 322 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 323 if (!dc) return 0 - (int16_t)JDR_INP; /* Err: read error or wrong stream termination */
WiredHome 115:c9862fd0c689 324 } else {
WiredHome 115:c9862fd0c689 325 dp++; /* Next data ptr */
WiredHome 115:c9862fd0c689 326 }
WiredHome 115:c9862fd0c689 327 dc--; /* Decrement number of available bytes */
WiredHome 115:c9862fd0c689 328 if (f) { /* In flag sequence? */
WiredHome 115:c9862fd0c689 329 f = 0; /* Exit flag sequence */
WiredHome 115:c9862fd0c689 330 if (*dp != 0) return 0 - (int16_t)JDR_FMT1; /* Err: unexpected flag is detected (may be collapted data) */
WiredHome 115:c9862fd0c689 331 *dp = s = 0xFF; /* The flag is a data 0xFF */
WiredHome 115:c9862fd0c689 332 } else {
WiredHome 115:c9862fd0c689 333 s = *dp; /* Get next data byte */
WiredHome 115:c9862fd0c689 334 if (s == 0xFF) { /* Is start of flag sequence? */
WiredHome 115:c9862fd0c689 335 f = 1; continue; /* Enter flag sequence */
WiredHome 115:c9862fd0c689 336 }
WiredHome 115:c9862fd0c689 337 }
WiredHome 115:c9862fd0c689 338 msk = 0x80; /* Read from MSB */
WiredHome 115:c9862fd0c689 339 }
WiredHome 115:c9862fd0c689 340 v <<= 1; /* Get a bit */
WiredHome 115:c9862fd0c689 341 if (s & msk) v++;
WiredHome 115:c9862fd0c689 342 msk >>= 1;
WiredHome 115:c9862fd0c689 343 nbit--;
WiredHome 115:c9862fd0c689 344 } while (nbit);
WiredHome 115:c9862fd0c689 345 jd->dmsk = msk; jd->dctr = dc; jd->dptr = dp;
WiredHome 115:c9862fd0c689 346
WiredHome 115:c9862fd0c689 347 return (int16_t)v;
WiredHome 115:c9862fd0c689 348 }
WiredHome 115:c9862fd0c689 349
WiredHome 115:c9862fd0c689 350
WiredHome 115:c9862fd0c689 351
WiredHome 115:c9862fd0c689 352
WiredHome 115:c9862fd0c689 353 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 354 /* Extract a huffman decoded data from input stream */
WiredHome 115:c9862fd0c689 355 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 356
WiredHome 115:c9862fd0c689 357 int16_t GraphicsDisplay::huffext ( /* >=0: decoded data, <0: error code */
WiredHome 115:c9862fd0c689 358 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 359 const uint8_t * hbits, /* Pointer to the bit distribution table */
WiredHome 115:c9862fd0c689 360 const uint16_t * hcode, /* Pointer to the code word table */
WiredHome 115:c9862fd0c689 361 const uint8_t * hdata /* Pointer to the data table */
WiredHome 115:c9862fd0c689 362 )
WiredHome 115:c9862fd0c689 363 {
WiredHome 115:c9862fd0c689 364 uint8_t msk, s, *dp;
WiredHome 115:c9862fd0c689 365 uint16_t dc, v, f, bl, nd;
WiredHome 115:c9862fd0c689 366
WiredHome 115:c9862fd0c689 367
WiredHome 115:c9862fd0c689 368 msk = jd->dmsk; dc = jd->dctr; dp = jd->dptr; /* Bit mask, number of data available, read ptr */
WiredHome 115:c9862fd0c689 369 s = *dp; v = f = 0;
WiredHome 115:c9862fd0c689 370 bl = 16; /* Max code length */
WiredHome 115:c9862fd0c689 371 do {
WiredHome 115:c9862fd0c689 372 if (!msk) { /* Next byte? */
WiredHome 115:c9862fd0c689 373 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 374 dp = jd->inbuf; /* Top of input buffer */
WiredHome 115:c9862fd0c689 375 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 376 if (!dc) return 0 - (int16_t)JDR_INP; /* Err: read error or wrong stream termination */
WiredHome 115:c9862fd0c689 377 } else {
WiredHome 115:c9862fd0c689 378 dp++; /* Next data ptr */
WiredHome 115:c9862fd0c689 379 }
WiredHome 115:c9862fd0c689 380 dc--; /* Decrement number of available bytes */
WiredHome 115:c9862fd0c689 381 if (f) { /* In flag sequence? */
WiredHome 115:c9862fd0c689 382 f = 0; /* Exit flag sequence */
WiredHome 115:c9862fd0c689 383 if (*dp != 0)
WiredHome 115:c9862fd0c689 384 return 0 - (int16_t)JDR_FMT1; /* Err: unexpected flag is detected (may be collapted data) */
WiredHome 115:c9862fd0c689 385 *dp = s = 0xFF; /* The flag is a data 0xFF */
WiredHome 115:c9862fd0c689 386 } else {
WiredHome 115:c9862fd0c689 387 s = *dp; /* Get next data byte */
WiredHome 115:c9862fd0c689 388 if (s == 0xFF) { /* Is start of flag sequence? */
WiredHome 115:c9862fd0c689 389 f = 1; continue; /* Enter flag sequence, get trailing byte */
WiredHome 115:c9862fd0c689 390 }
WiredHome 115:c9862fd0c689 391 }
WiredHome 115:c9862fd0c689 392 msk = 0x80; /* Read from MSB */
WiredHome 115:c9862fd0c689 393 }
WiredHome 115:c9862fd0c689 394 v <<= 1; /* Get a bit */
WiredHome 115:c9862fd0c689 395 if (s & msk) v++;
WiredHome 115:c9862fd0c689 396 msk >>= 1;
WiredHome 115:c9862fd0c689 397
WiredHome 115:c9862fd0c689 398 for (nd = *hbits++; nd; nd--) { /* Search the code word in this bit length */
WiredHome 115:c9862fd0c689 399 if (v == *hcode++) { /* Matched? */
WiredHome 115:c9862fd0c689 400 jd->dmsk = msk; jd->dctr = dc; jd->dptr = dp;
WiredHome 115:c9862fd0c689 401 return *hdata; /* Return the decoded data */
WiredHome 115:c9862fd0c689 402 }
WiredHome 115:c9862fd0c689 403 hdata++;
WiredHome 115:c9862fd0c689 404 }
WiredHome 115:c9862fd0c689 405 bl--;
WiredHome 115:c9862fd0c689 406 } while (bl);
WiredHome 115:c9862fd0c689 407
WiredHome 115:c9862fd0c689 408 return 0 - (int16_t)JDR_FMT1; /* Err: code not found (may be collapted data) */
WiredHome 115:c9862fd0c689 409 }
WiredHome 115:c9862fd0c689 410
WiredHome 115:c9862fd0c689 411
WiredHome 115:c9862fd0c689 412
WiredHome 115:c9862fd0c689 413
WiredHome 115:c9862fd0c689 414 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 415 /* Apply Inverse-DCT in Arai Algorithm (see also aa_idct.png) */
WiredHome 115:c9862fd0c689 416 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 417
WiredHome 115:c9862fd0c689 418 static
WiredHome 115:c9862fd0c689 419 void block_idct (
WiredHome 115:c9862fd0c689 420 int32_t * src, /* Input block data (de-quantized and pre-scaled for Arai Algorithm) */
WiredHome 115:c9862fd0c689 421 uint8_t * dst /* Pointer to the destination to store the block as byte array */
WiredHome 115:c9862fd0c689 422 )
WiredHome 115:c9862fd0c689 423 {
WiredHome 115:c9862fd0c689 424 const int32_t M13 = (int32_t)(1.41421*4096), M2 = (int32_t)(1.08239*4096), M4 = (int32_t)(2.61313*4096), M5 = (int32_t)(1.84776*4096);
WiredHome 115:c9862fd0c689 425 int32_t v0, v1, v2, v3, v4, v5, v6, v7;
WiredHome 115:c9862fd0c689 426 int32_t t10, t11, t12, t13;
WiredHome 115:c9862fd0c689 427 uint16_t i;
WiredHome 115:c9862fd0c689 428
WiredHome 115:c9862fd0c689 429 /* Process columns */
WiredHome 115:c9862fd0c689 430 for (i = 0; i < 8; i++) {
WiredHome 115:c9862fd0c689 431 v0 = src[8 * 0]; /* Get even elements */
WiredHome 115:c9862fd0c689 432 v1 = src[8 * 2];
WiredHome 115:c9862fd0c689 433 v2 = src[8 * 4];
WiredHome 115:c9862fd0c689 434 v3 = src[8 * 6];
WiredHome 115:c9862fd0c689 435
WiredHome 115:c9862fd0c689 436 t10 = v0 + v2; /* Process the even elements */
WiredHome 115:c9862fd0c689 437 t12 = v0 - v2;
WiredHome 115:c9862fd0c689 438 t11 = (v1 - v3) * M13 >> 12;
WiredHome 115:c9862fd0c689 439 v3 += v1;
WiredHome 115:c9862fd0c689 440 t11 -= v3;
WiredHome 115:c9862fd0c689 441 v0 = t10 + v3;
WiredHome 115:c9862fd0c689 442 v3 = t10 - v3;
WiredHome 115:c9862fd0c689 443 v1 = t11 + t12;
WiredHome 115:c9862fd0c689 444 v2 = t12 - t11;
WiredHome 115:c9862fd0c689 445
WiredHome 115:c9862fd0c689 446 v4 = src[8 * 7]; /* Get odd elements */
WiredHome 115:c9862fd0c689 447 v5 = src[8 * 1];
WiredHome 115:c9862fd0c689 448 v6 = src[8 * 5];
WiredHome 115:c9862fd0c689 449 v7 = src[8 * 3];
WiredHome 115:c9862fd0c689 450
WiredHome 115:c9862fd0c689 451 t10 = v5 - v4; /* Process the odd elements */
WiredHome 115:c9862fd0c689 452 t11 = v5 + v4;
WiredHome 115:c9862fd0c689 453 t12 = v6 - v7;
WiredHome 115:c9862fd0c689 454 v7 += v6;
WiredHome 115:c9862fd0c689 455 v5 = (t11 - v7) * M13 >> 12;
WiredHome 115:c9862fd0c689 456 v7 += t11;
WiredHome 115:c9862fd0c689 457 t13 = (t10 + t12) * M5 >> 12;
WiredHome 115:c9862fd0c689 458 v4 = t13 - (t10 * M2 >> 12);
WiredHome 115:c9862fd0c689 459 v6 = t13 - (t12 * M4 >> 12) - v7;
WiredHome 115:c9862fd0c689 460 v5 -= v6;
WiredHome 115:c9862fd0c689 461 v4 -= v5;
WiredHome 115:c9862fd0c689 462
WiredHome 115:c9862fd0c689 463 src[8 * 0] = v0 + v7; /* Write-back transformed values */
WiredHome 115:c9862fd0c689 464 src[8 * 7] = v0 - v7;
WiredHome 115:c9862fd0c689 465 src[8 * 1] = v1 + v6;
WiredHome 115:c9862fd0c689 466 src[8 * 6] = v1 - v6;
WiredHome 115:c9862fd0c689 467 src[8 * 2] = v2 + v5;
WiredHome 115:c9862fd0c689 468 src[8 * 5] = v2 - v5;
WiredHome 115:c9862fd0c689 469 src[8 * 3] = v3 + v4;
WiredHome 115:c9862fd0c689 470 src[8 * 4] = v3 - v4;
WiredHome 115:c9862fd0c689 471
WiredHome 115:c9862fd0c689 472 src++; /* Next column */
WiredHome 115:c9862fd0c689 473 }
WiredHome 115:c9862fd0c689 474
WiredHome 115:c9862fd0c689 475 /* Process rows */
WiredHome 115:c9862fd0c689 476 src -= 8;
WiredHome 115:c9862fd0c689 477 for (i = 0; i < 8; i++) {
WiredHome 115:c9862fd0c689 478 v0 = src[0] + (128L << 8); /* Get even elements (remove DC offset (-128) here) */
WiredHome 115:c9862fd0c689 479 v1 = src[2];
WiredHome 115:c9862fd0c689 480 v2 = src[4];
WiredHome 115:c9862fd0c689 481 v3 = src[6];
WiredHome 115:c9862fd0c689 482
WiredHome 115:c9862fd0c689 483 t10 = v0 + v2; /* Process the even elements */
WiredHome 115:c9862fd0c689 484 t12 = v0 - v2;
WiredHome 115:c9862fd0c689 485 t11 = (v1 - v3) * M13 >> 12;
WiredHome 115:c9862fd0c689 486 v3 += v1;
WiredHome 115:c9862fd0c689 487 t11 -= v3;
WiredHome 115:c9862fd0c689 488 v0 = t10 + v3;
WiredHome 115:c9862fd0c689 489 v3 = t10 - v3;
WiredHome 115:c9862fd0c689 490 v1 = t11 + t12;
WiredHome 115:c9862fd0c689 491 v2 = t12 - t11;
WiredHome 115:c9862fd0c689 492
WiredHome 115:c9862fd0c689 493 v4 = src[7]; /* Get odd elements */
WiredHome 115:c9862fd0c689 494 v5 = src[1];
WiredHome 115:c9862fd0c689 495 v6 = src[5];
WiredHome 115:c9862fd0c689 496 v7 = src[3];
WiredHome 115:c9862fd0c689 497
WiredHome 115:c9862fd0c689 498 t10 = v5 - v4; /* Process the odd elements */
WiredHome 115:c9862fd0c689 499 t11 = v5 + v4;
WiredHome 115:c9862fd0c689 500 t12 = v6 - v7;
WiredHome 115:c9862fd0c689 501 v7 += v6;
WiredHome 115:c9862fd0c689 502 v5 = (t11 - v7) * M13 >> 12;
WiredHome 115:c9862fd0c689 503 v7 += t11;
WiredHome 115:c9862fd0c689 504 t13 = (t10 + t12) * M5 >> 12;
WiredHome 115:c9862fd0c689 505 v4 = t13 - (t10 * M2 >> 12);
WiredHome 115:c9862fd0c689 506 v6 = t13 - (t12 * M4 >> 12) - v7;
WiredHome 115:c9862fd0c689 507 v5 -= v6;
WiredHome 115:c9862fd0c689 508 v4 -= v5;
WiredHome 115:c9862fd0c689 509
WiredHome 115:c9862fd0c689 510 dst[0] = BYTECLIP((v0 + v7) >> 8); /* Descale the transformed values 8 bits and output */
WiredHome 115:c9862fd0c689 511 dst[7] = BYTECLIP((v0 - v7) >> 8);
WiredHome 115:c9862fd0c689 512 dst[1] = BYTECLIP((v1 + v6) >> 8);
WiredHome 115:c9862fd0c689 513 dst[6] = BYTECLIP((v1 - v6) >> 8);
WiredHome 115:c9862fd0c689 514 dst[2] = BYTECLIP((v2 + v5) >> 8);
WiredHome 115:c9862fd0c689 515 dst[5] = BYTECLIP((v2 - v5) >> 8);
WiredHome 115:c9862fd0c689 516 dst[3] = BYTECLIP((v3 + v4) >> 8);
WiredHome 115:c9862fd0c689 517 dst[4] = BYTECLIP((v3 - v4) >> 8);
WiredHome 115:c9862fd0c689 518 dst += 8;
WiredHome 115:c9862fd0c689 519
WiredHome 115:c9862fd0c689 520 src += 8; /* Next row */
WiredHome 115:c9862fd0c689 521 }
WiredHome 115:c9862fd0c689 522 }
WiredHome 115:c9862fd0c689 523
WiredHome 115:c9862fd0c689 524
WiredHome 115:c9862fd0c689 525
WiredHome 115:c9862fd0c689 526
WiredHome 115:c9862fd0c689 527 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 528 /* Load all blocks in the MCU into working buffer */
WiredHome 115:c9862fd0c689 529 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 530
WiredHome 115:c9862fd0c689 531 JRESULT GraphicsDisplay::mcu_load (
WiredHome 115:c9862fd0c689 532 JDEC * jd /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 533 )
WiredHome 115:c9862fd0c689 534 {
WiredHome 115:c9862fd0c689 535 int32_t *tmp = (int32_t *)jd->workbuf; /* Block working buffer for de-quantize and IDCT */
WiredHome 115:c9862fd0c689 536 uint16_t blk, nby, nbc, i, z, id, cmp;
WiredHome 115:c9862fd0c689 537 int16_t b, d, e;
WiredHome 115:c9862fd0c689 538 uint8_t *bp;
WiredHome 115:c9862fd0c689 539 const uint8_t *hb, *hd;
WiredHome 115:c9862fd0c689 540 const uint16_t *hc;
WiredHome 115:c9862fd0c689 541 const int32_t *dqf;
WiredHome 115:c9862fd0c689 542
WiredHome 118:34eb0b64fc61 543 INFO("mcu_load");
WiredHome 118:34eb0b64fc61 544 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 545
WiredHome 115:c9862fd0c689 546 nby = jd->msx * jd->msy; /* Number of Y blocks (1, 2 or 4) */
WiredHome 115:c9862fd0c689 547 nbc = 2; /* Number of C blocks (2) */
WiredHome 115:c9862fd0c689 548 bp = jd->mcubuf; /* Pointer to the first block */
WiredHome 115:c9862fd0c689 549
WiredHome 115:c9862fd0c689 550 for (blk = 0; blk < nby + nbc; blk++) {
WiredHome 115:c9862fd0c689 551 cmp = (blk < nby) ? 0 : blk - nby + 1; /* Component number 0:Y, 1:Cb, 2:Cr */
WiredHome 115:c9862fd0c689 552 id = cmp ? 1 : 0; /* Huffman table ID of the component */
WiredHome 115:c9862fd0c689 553
WiredHome 115:c9862fd0c689 554 /* Extract a DC element from input stream */
WiredHome 115:c9862fd0c689 555 hb = jd->huffbits[id][0]; /* Huffman table for the DC element */
WiredHome 115:c9862fd0c689 556 hc = jd->huffcode[id][0];
WiredHome 115:c9862fd0c689 557 hd = jd->huffdata[id][0];
WiredHome 115:c9862fd0c689 558 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded data (bit length) */
WiredHome 115:c9862fd0c689 559 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input */
WiredHome 115:c9862fd0c689 560 d = jd->dcv[cmp]; /* DC value of previous block */
WiredHome 115:c9862fd0c689 561 if (b) { /* If there is any difference from previous block */
WiredHome 115:c9862fd0c689 562 e = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 563 if (e < 0) return (JRESULT)(0 - e); /* Err: input */
WiredHome 115:c9862fd0c689 564 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 565 if (!(e & b)) e -= (b << 1) - 1; /* Restore sign if needed */
WiredHome 115:c9862fd0c689 566 d += e; /* Get current value */
WiredHome 115:c9862fd0c689 567 jd->dcv[cmp] = (int16_t)d; /* Save current DC value for next block */
WiredHome 115:c9862fd0c689 568 }
WiredHome 115:c9862fd0c689 569 dqf = jd->qttbl[jd->qtid[cmp]]; /* De-quantizer table ID for this component */
WiredHome 115:c9862fd0c689 570 tmp[0] = d * dqf[0] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 571
WiredHome 115:c9862fd0c689 572 /* Extract following 63 AC elements from input stream */
WiredHome 115:c9862fd0c689 573 for (i = 1; i < 64; i++) tmp[i] = 0; /* Clear rest of elements */
WiredHome 115:c9862fd0c689 574 hb = jd->huffbits[id][1]; /* Huffman table for the AC elements */
WiredHome 115:c9862fd0c689 575 hc = jd->huffcode[id][1];
WiredHome 115:c9862fd0c689 576 hd = jd->huffdata[id][1];
WiredHome 115:c9862fd0c689 577 i = 1; /* Top of the AC elements */
WiredHome 115:c9862fd0c689 578 do {
WiredHome 115:c9862fd0c689 579 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded value (zero runs and bit length) */
WiredHome 115:c9862fd0c689 580 if (b == 0) break; /* EOB? */
WiredHome 115:c9862fd0c689 581 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input error */
WiredHome 115:c9862fd0c689 582 z = (uint16_t)b >> 4; /* Number of leading zero elements */
WiredHome 115:c9862fd0c689 583 if (z) {
WiredHome 115:c9862fd0c689 584 i += z; /* Skip zero elements */
WiredHome 115:c9862fd0c689 585 if (i >= 64) return JDR_FMT1; /* Too long zero run */
WiredHome 115:c9862fd0c689 586 }
WiredHome 115:c9862fd0c689 587 if (b &= 0x0F) { /* Bit length */
WiredHome 115:c9862fd0c689 588 d = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 589 if (d < 0) return (JRESULT)(0 - d); /* Err: input device */
WiredHome 115:c9862fd0c689 590 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 591 if (!(d & b)) d -= (b << 1) - 1;/* Restore negative value if needed */
WiredHome 115:c9862fd0c689 592 z = ZIG(i); /* Zigzag-order to raster-order converted index */
WiredHome 115:c9862fd0c689 593 tmp[z] = d * dqf[z] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 594 }
WiredHome 115:c9862fd0c689 595 } while (++i < 64); /* Next AC element */
WiredHome 115:c9862fd0c689 596
WiredHome 115:c9862fd0c689 597 if (JD_USE_SCALE && jd->scale == 3)
WiredHome 115:c9862fd0c689 598 *bp = (*tmp / 256) + 128; /* If scale ratio is 1/8, IDCT can be ommited and only DC element is used */
WiredHome 115:c9862fd0c689 599 else
WiredHome 115:c9862fd0c689 600 block_idct(tmp, bp); /* Apply IDCT and store the block to the MCU buffer */
WiredHome 115:c9862fd0c689 601
WiredHome 115:c9862fd0c689 602 bp += 64; /* Next block */
WiredHome 115:c9862fd0c689 603 }
WiredHome 115:c9862fd0c689 604
WiredHome 115:c9862fd0c689 605 return JDR_OK; /* All blocks have been loaded successfully */
WiredHome 115:c9862fd0c689 606 }
WiredHome 115:c9862fd0c689 607
WiredHome 115:c9862fd0c689 608
WiredHome 115:c9862fd0c689 609
WiredHome 115:c9862fd0c689 610
WiredHome 115:c9862fd0c689 611 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 612 /* Output an MCU: Convert YCrCb to RGB and output it in RGB form */
WiredHome 115:c9862fd0c689 613 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 614
WiredHome 115:c9862fd0c689 615 JRESULT GraphicsDisplay::mcu_output (
WiredHome 115:c9862fd0c689 616 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 617 uint16_t (* outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 618 uint16_t x, /* MCU position in the image (left of the MCU) */
WiredHome 115:c9862fd0c689 619 uint16_t y /* MCU position in the image (top of the MCU) */
WiredHome 115:c9862fd0c689 620 )
WiredHome 115:c9862fd0c689 621 {
WiredHome 115:c9862fd0c689 622 const int16_t CVACC = (sizeof (int16_t) > 2) ? 1024 : 128;
WiredHome 115:c9862fd0c689 623 uint16_t ix, iy, mx, my, rx, ry;
WiredHome 115:c9862fd0c689 624 int16_t yy, cb, cr;
WiredHome 115:c9862fd0c689 625 uint8_t *py, *pc, *rgb24;
WiredHome 115:c9862fd0c689 626 JRECT rect;
WiredHome 115:c9862fd0c689 627
WiredHome 118:34eb0b64fc61 628 INFO("mcu_output(%p,%p,%d,%d)", jd, outfunc, x, y);
WiredHome 118:34eb0b64fc61 629 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 630
WiredHome 115:c9862fd0c689 631 mx = jd->msx * 8; my = jd->msy * 8; /* MCU size (pixel) */
WiredHome 115:c9862fd0c689 632 rx = (x + mx <= jd->width) ? mx : jd->width - x; /* Output rectangular size (it may be clipped at right/bottom end) */
WiredHome 115:c9862fd0c689 633 ry = (y + my <= jd->height) ? my : jd->height - y;
WiredHome 115:c9862fd0c689 634 if (JD_USE_SCALE) {
WiredHome 115:c9862fd0c689 635 rx >>= jd->scale; ry >>= jd->scale;
WiredHome 115:c9862fd0c689 636 if (!rx || !ry) return JDR_OK; /* Skip this MCU if all pixel is to be rounded off */
WiredHome 115:c9862fd0c689 637 x >>= jd->scale; y >>= jd->scale;
WiredHome 115:c9862fd0c689 638 }
WiredHome 115:c9862fd0c689 639 rect.left = x; rect.right = x + rx - 1; /* Rectangular area in the frame buffer */
WiredHome 115:c9862fd0c689 640 rect.top = y; rect.bottom = y + ry - 1;
WiredHome 115:c9862fd0c689 641
WiredHome 115:c9862fd0c689 642
WiredHome 115:c9862fd0c689 643 if (!JD_USE_SCALE || jd->scale != 3) { /* Not for 1/8 scaling */
WiredHome 115:c9862fd0c689 644
WiredHome 115:c9862fd0c689 645 /* Build an RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 646 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 647 for (iy = 0; iy < my; iy++) {
WiredHome 115:c9862fd0c689 648 pc = jd->mcubuf;
WiredHome 115:c9862fd0c689 649 py = pc + iy * 8;
WiredHome 115:c9862fd0c689 650 if (my == 16) { /* Double block height? */
WiredHome 115:c9862fd0c689 651 pc += 64 * 4 + (iy >> 1) * 8;
WiredHome 115:c9862fd0c689 652 if (iy >= 8) py += 64;
WiredHome 115:c9862fd0c689 653 } else { /* Single block height */
WiredHome 115:c9862fd0c689 654 pc += mx * 8 + iy * 8;
WiredHome 115:c9862fd0c689 655 }
WiredHome 115:c9862fd0c689 656 for (ix = 0; ix < mx; ix++) {
WiredHome 115:c9862fd0c689 657 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 658 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 659 if (mx == 16) { /* Double block width? */
WiredHome 115:c9862fd0c689 660 if (ix == 8) py += 64 - 8; /* Jump to next block if double block heigt */
WiredHome 115:c9862fd0c689 661 pc += ix & 1; /* Increase chroma pointer every two pixels */
WiredHome 115:c9862fd0c689 662 } else { /* Single block width */
WiredHome 115:c9862fd0c689 663 pc++; /* Increase chroma pointer every pixel */
WiredHome 115:c9862fd0c689 664 }
WiredHome 115:c9862fd0c689 665 yy = *py++; /* Get Y component */
WiredHome 115:c9862fd0c689 666
WiredHome 115:c9862fd0c689 667 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 668 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 669 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 670 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb) / CVACC);
WiredHome 115:c9862fd0c689 671 }
WiredHome 115:c9862fd0c689 672 }
WiredHome 115:c9862fd0c689 673
WiredHome 115:c9862fd0c689 674 /* Descale the MCU rectangular if needed */
WiredHome 115:c9862fd0c689 675 if (JD_USE_SCALE && jd->scale) {
WiredHome 115:c9862fd0c689 676 uint16_t x, y, r, g, b, s, w, a;
WiredHome 115:c9862fd0c689 677 uint8_t *op;
WiredHome 115:c9862fd0c689 678
WiredHome 115:c9862fd0c689 679 /* Get averaged RGB value of each square correcponds to a pixel */
WiredHome 115:c9862fd0c689 680 s = jd->scale * 2; /* Bumber of shifts for averaging */
WiredHome 115:c9862fd0c689 681 w = 1 << jd->scale; /* Width of square */
WiredHome 115:c9862fd0c689 682 a = (mx - w) * 3; /* Bytes to skip for next line in the square */
WiredHome 115:c9862fd0c689 683 op = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 684 for (iy = 0; iy < my; iy += w) {
WiredHome 115:c9862fd0c689 685 for (ix = 0; ix < mx; ix += w) {
WiredHome 115:c9862fd0c689 686 rgb24 = (uint8_t *)jd->workbuf + (iy * mx + ix) * 3;
WiredHome 115:c9862fd0c689 687 r = g = b = 0;
WiredHome 115:c9862fd0c689 688 for (y = 0; y < w; y++) { /* Accumulate RGB value in the square */
WiredHome 115:c9862fd0c689 689 for (x = 0; x < w; x++) {
WiredHome 115:c9862fd0c689 690 r += *rgb24++;
WiredHome 115:c9862fd0c689 691 g += *rgb24++;
WiredHome 115:c9862fd0c689 692 b += *rgb24++;
WiredHome 115:c9862fd0c689 693 }
WiredHome 115:c9862fd0c689 694 rgb24 += a;
WiredHome 115:c9862fd0c689 695 } /* Put the averaged RGB value as a pixel */
WiredHome 115:c9862fd0c689 696 *op++ = (uint8_t)(r >> s);
WiredHome 115:c9862fd0c689 697 *op++ = (uint8_t)(g >> s);
WiredHome 115:c9862fd0c689 698 *op++ = (uint8_t)(b >> s);
WiredHome 115:c9862fd0c689 699 }
WiredHome 115:c9862fd0c689 700 }
WiredHome 115:c9862fd0c689 701 }
WiredHome 115:c9862fd0c689 702
WiredHome 115:c9862fd0c689 703 } else { /* For only 1/8 scaling (left-top pixel in each block are the DC value of the block) */
WiredHome 115:c9862fd0c689 704
WiredHome 115:c9862fd0c689 705 /* Build a 1/8 descaled RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 706 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 707 pc = jd->mcubuf + mx * my;
WiredHome 115:c9862fd0c689 708 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 709 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 710 for (iy = 0; iy < my; iy += 8) {
WiredHome 115:c9862fd0c689 711 py = jd->mcubuf;
WiredHome 115:c9862fd0c689 712 if (iy == 8) py += 64 * 2;
WiredHome 115:c9862fd0c689 713 for (ix = 0; ix < mx; ix += 8) {
WiredHome 115:c9862fd0c689 714 yy = *py; /* Get Y component */
WiredHome 115:c9862fd0c689 715 py += 64;
WiredHome 115:c9862fd0c689 716
WiredHome 115:c9862fd0c689 717 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 718 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr / CVACC));
WiredHome 115:c9862fd0c689 719 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 720 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb / CVACC));
WiredHome 115:c9862fd0c689 721 }
WiredHome 115:c9862fd0c689 722 }
WiredHome 115:c9862fd0c689 723 }
WiredHome 115:c9862fd0c689 724
WiredHome 115:c9862fd0c689 725 /* Squeeze up pixel table if a part of MCU is to be truncated */
WiredHome 115:c9862fd0c689 726 mx >>= jd->scale;
WiredHome 115:c9862fd0c689 727 if (rx < mx) {
WiredHome 115:c9862fd0c689 728 uint8_t *s, *d;
WiredHome 115:c9862fd0c689 729 uint16_t x, y;
WiredHome 115:c9862fd0c689 730
WiredHome 115:c9862fd0c689 731 s = d = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 732 for (y = 0; y < ry; y++) {
WiredHome 115:c9862fd0c689 733 for (x = 0; x < rx; x++) { /* Copy effective pixels */
WiredHome 115:c9862fd0c689 734 *d++ = *s++;
WiredHome 115:c9862fd0c689 735 *d++ = *s++;
WiredHome 115:c9862fd0c689 736 *d++ = *s++;
WiredHome 115:c9862fd0c689 737 }
WiredHome 115:c9862fd0c689 738 s += (mx - rx) * 3; /* Skip truncated pixels */
WiredHome 115:c9862fd0c689 739 }
WiredHome 115:c9862fd0c689 740 }
WiredHome 115:c9862fd0c689 741
WiredHome 115:c9862fd0c689 742 /* Convert RGB888 to RGB565 if needed */
WiredHome 115:c9862fd0c689 743 if (JD_FORMAT == 1) {
WiredHome 115:c9862fd0c689 744 uint8_t *s = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 745 uint16_t w, *d = (uint16_t *)s;
WiredHome 115:c9862fd0c689 746 uint16_t n = rx * ry;
WiredHome 115:c9862fd0c689 747
WiredHome 115:c9862fd0c689 748 do {
WiredHome 115:c9862fd0c689 749 w = (*s++ & 0xF8) << 8; /* RRRRR----------- */
WiredHome 115:c9862fd0c689 750 w |= (*s++ & 0xFC) << 3; /* -----GGGGGG----- */
WiredHome 115:c9862fd0c689 751 w |= *s++ >> 3; /* -----------BBBBB */
WiredHome 115:c9862fd0c689 752 *d++ = w;
WiredHome 115:c9862fd0c689 753 } while (--n);
WiredHome 115:c9862fd0c689 754 }
WiredHome 115:c9862fd0c689 755
WiredHome 115:c9862fd0c689 756 /* Output the RGB rectangular */
WiredHome 119:d129b798f82f 757 INFO("call outfunc");
WiredHome 115:c9862fd0c689 758 if (outfunc)
WiredHome 115:c9862fd0c689 759 return outfunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 760 else
WiredHome 115:c9862fd0c689 761 return privOutFunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 762 }
WiredHome 115:c9862fd0c689 763
WiredHome 115:c9862fd0c689 764
WiredHome 115:c9862fd0c689 765
WiredHome 115:c9862fd0c689 766
WiredHome 115:c9862fd0c689 767 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 768 /* Process restart interval */
WiredHome 115:c9862fd0c689 769 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 770
WiredHome 115:c9862fd0c689 771 JRESULT GraphicsDisplay::restart (
WiredHome 115:c9862fd0c689 772 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 773 uint16_t rstn /* Expected restert sequense number */
WiredHome 115:c9862fd0c689 774 )
WiredHome 115:c9862fd0c689 775 {
WiredHome 115:c9862fd0c689 776 uint16_t i, dc;
WiredHome 115:c9862fd0c689 777 uint16_t d;
WiredHome 115:c9862fd0c689 778 uint8_t *dp;
WiredHome 118:34eb0b64fc61 779
WiredHome 116:43e5bd2d7302 780 INFO("restart(%p,%d)", jd, rstn);
WiredHome 115:c9862fd0c689 781
WiredHome 115:c9862fd0c689 782 /* Discard padding bits and get two bytes from the input stream */
WiredHome 115:c9862fd0c689 783 dp = jd->dptr; dc = jd->dctr;
WiredHome 115:c9862fd0c689 784 d = 0;
WiredHome 115:c9862fd0c689 785 for (i = 0; i < 2; i++) {
WiredHome 115:c9862fd0c689 786 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 787 dp = jd->inbuf;
WiredHome 115:c9862fd0c689 788 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 789 if (!dc) return JDR_INP;
WiredHome 115:c9862fd0c689 790 } else {
WiredHome 115:c9862fd0c689 791 dp++;
WiredHome 115:c9862fd0c689 792 }
WiredHome 115:c9862fd0c689 793 dc--;
WiredHome 115:c9862fd0c689 794 d = (d << 8) | *dp; /* Get a byte */
WiredHome 115:c9862fd0c689 795 }
WiredHome 115:c9862fd0c689 796 jd->dptr = dp; jd->dctr = dc; jd->dmsk = 0;
WiredHome 115:c9862fd0c689 797
WiredHome 115:c9862fd0c689 798 /* Check the marker */
WiredHome 115:c9862fd0c689 799 if ((d & 0xFFD8) != 0xFFD0 || (d & 7) != (rstn & 7))
WiredHome 115:c9862fd0c689 800 return JDR_FMT1; /* Err: expected RSTn marker is not detected (may be collapted data) */
WiredHome 115:c9862fd0c689 801
WiredHome 115:c9862fd0c689 802 /* Reset DC offset */
WiredHome 115:c9862fd0c689 803 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0;
WiredHome 115:c9862fd0c689 804
WiredHome 115:c9862fd0c689 805 return JDR_OK;
WiredHome 115:c9862fd0c689 806 }
WiredHome 115:c9862fd0c689 807
WiredHome 115:c9862fd0c689 808
WiredHome 115:c9862fd0c689 809
WiredHome 115:c9862fd0c689 810
WiredHome 115:c9862fd0c689 811 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 812 /* Analyze the JPEG image and Initialize decompressor object */
WiredHome 115:c9862fd0c689 813 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 814
WiredHome 115:c9862fd0c689 815 #define LDB_WORD(ptr) (uint16_t)(((uint16_t)*((uint8_t *)(ptr))<<8)|(uint16_t)*(uint8_t *)((ptr)+1))
WiredHome 115:c9862fd0c689 816
WiredHome 115:c9862fd0c689 817 uint16_t GraphicsDisplay::privInFunc(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 818 {
WiredHome 120:be2aaa3adf72 819 //INFO("Read in %p count %d", buff, ndata);
WiredHome 115:c9862fd0c689 820 if (buff) {
WiredHome 115:c9862fd0c689 821 size_t n = fread(buff, 1, ndata, (FILE *)jd->device);
WiredHome 115:c9862fd0c689 822 INFO("fread returned %d of %d", n, ndata);
WiredHome 115:c9862fd0c689 823 HexDump("buf", buff, (ndata > 32) ? 32 : ndata);
WiredHome 115:c9862fd0c689 824 return n == (size_t)-1 ? 0 : n;
WiredHome 115:c9862fd0c689 825 } else {
WiredHome 115:c9862fd0c689 826 off_t t = fseek((FILE *)jd->device, ndata, SEEK_CUR);
WiredHome 115:c9862fd0c689 827 INFO("Seek returned %d", t);
WiredHome 115:c9862fd0c689 828 return t == (off_t)-1 ? 0 : ndata;
WiredHome 115:c9862fd0c689 829 }
WiredHome 115:c9862fd0c689 830 }
WiredHome 115:c9862fd0c689 831
WiredHome 115:c9862fd0c689 832 uint16_t GraphicsDisplay::getJpegData(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 833 {
WiredHome 120:be2aaa3adf72 834 //INFO("getJpegData(%p, %p, %d)", jd, buff, ndata);
WiredHome 115:c9862fd0c689 835 if (jd->infunc)
WiredHome 115:c9862fd0c689 836 return jd->infunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 837 else
WiredHome 115:c9862fd0c689 838 return privInFunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 839 }
WiredHome 115:c9862fd0c689 840
WiredHome 115:c9862fd0c689 841
WiredHome 115:c9862fd0c689 842 uint16_t GraphicsDisplay::privOutFunc(JDEC * jd, void * bitmap, JRECT * rect)
WiredHome 115:c9862fd0c689 843 {
WiredHome 115:c9862fd0c689 844 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 845 uint16_t *src = (uint16_t *)bitmap;
WiredHome 115:c9862fd0c689 846 #else
WiredHome 115:c9862fd0c689 847 uint8_t *src = (uint8_t *)bitmap;
WiredHome 115:c9862fd0c689 848 #endif
WiredHome 115:c9862fd0c689 849 int x0 = rect->left;
WiredHome 115:c9862fd0c689 850 int x1 = rect->right;
WiredHome 115:c9862fd0c689 851 int y0 = rect->top;
WiredHome 115:c9862fd0c689 852 int y1 = rect->bottom;
WiredHome 115:c9862fd0c689 853
WiredHome 115:c9862fd0c689 854 INFO("privOutFunc: (%d,%d)-(%d,%d) : (%d,%d)", x0,y0, x1,y1, width(), height());
WiredHome 115:c9862fd0c689 855 if (y0 >= height() || x0 >= width())
WiredHome 115:c9862fd0c689 856 return 1;
WiredHome 115:c9862fd0c689 857
WiredHome 115:c9862fd0c689 858 if (x1 > width()-1) x1 = width() - 1;
WiredHome 115:c9862fd0c689 859 if (y1 > height()-1) y1 = height() - 1;
WiredHome 115:c9862fd0c689 860
WiredHome 115:c9862fd0c689 861 INFO("checkpoint");
WiredHome 115:c9862fd0c689 862 int w = x1 - x0 + 1;
WiredHome 115:c9862fd0c689 863 for (int y= y0; y <= y1; y++) {
WiredHome 115:c9862fd0c689 864 SetGraphicsCursor(x0, y);
WiredHome 115:c9862fd0c689 865 _StartGraphicsStream();
WiredHome 115:c9862fd0c689 866 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 867 uint16_t *p = src + w * (y - y0);
WiredHome 115:c9862fd0c689 868 #else
WiredHome 115:c9862fd0c689 869 uint8_t *p = src + 3 * (w * (y - y0));
WiredHome 115:c9862fd0c689 870 #endif
WiredHome 115:c9862fd0c689 871 for (int x=x0; x <= x1; x++) {
WiredHome 115:c9862fd0c689 872 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 873 _putp(*p++);
WiredHome 115:c9862fd0c689 874 #else
WiredHome 115:c9862fd0c689 875 _putp(RGB(*p, *(p+1), *(p+2)));
WiredHome 115:c9862fd0c689 876 p += 3;
WiredHome 115:c9862fd0c689 877 #endif
WiredHome 115:c9862fd0c689 878 }
WiredHome 115:c9862fd0c689 879 _EndGraphicsStream();
WiredHome 115:c9862fd0c689 880 }
WiredHome 115:c9862fd0c689 881 return 1;
WiredHome 115:c9862fd0c689 882 }
WiredHome 115:c9862fd0c689 883
WiredHome 115:c9862fd0c689 884 JRESULT GraphicsDisplay::jd_prepare (
WiredHome 115:c9862fd0c689 885 JDEC * jd, /* Blank decompressor object */
WiredHome 115:c9862fd0c689 886 uint16_t (*infunc)(JDEC *, uint8_t *, uint16_t), /* JPEG strem input function */
WiredHome 115:c9862fd0c689 887 void* pool, /* Working buffer for the decompression session */
WiredHome 115:c9862fd0c689 888 uint16_t sz_pool, /* Size of working buffer */
WiredHome 115:c9862fd0c689 889 void* dev /* I/O device identifier for the session */
WiredHome 115:c9862fd0c689 890 )
WiredHome 115:c9862fd0c689 891 {
WiredHome 115:c9862fd0c689 892 uint8_t *seg, b;
WiredHome 115:c9862fd0c689 893 uint16_t marker;
WiredHome 115:c9862fd0c689 894 uint32_t ofs;
WiredHome 115:c9862fd0c689 895 uint16_t n, i, j, len;
WiredHome 115:c9862fd0c689 896 JRESULT rc;
WiredHome 115:c9862fd0c689 897
WiredHome 120:be2aaa3adf72 898 INFO("jd_prepare(%p,%p,%p,%d,%p)", jd, infunc, pool, sz_pool, dev);
WiredHome 118:34eb0b64fc61 899 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 900
WiredHome 115:c9862fd0c689 901 if (!pool) {
WiredHome 115:c9862fd0c689 902 ERR("JDR_PAR");
WiredHome 115:c9862fd0c689 903 return JDR_PAR;
WiredHome 115:c9862fd0c689 904 }
WiredHome 115:c9862fd0c689 905
WiredHome 120:be2aaa3adf72 906 //INFO("pool is at %p", pool);
WiredHome 115:c9862fd0c689 907 jd->pool = pool; /* Work memroy */
WiredHome 115:c9862fd0c689 908 jd->sz_pool = sz_pool; /* Size of given work memory */
WiredHome 115:c9862fd0c689 909 jd->infunc = infunc; /* Stream input function */
WiredHome 115:c9862fd0c689 910 jd->device = dev; /* I/O device identifier */
WiredHome 115:c9862fd0c689 911 jd->nrst = 0; /* No restart interval (default) */
WiredHome 115:c9862fd0c689 912
WiredHome 115:c9862fd0c689 913 for (i = 0; i < 2; i++) { /* Nulls pointers */
WiredHome 115:c9862fd0c689 914 for (j = 0; j < 2; j++) {
WiredHome 115:c9862fd0c689 915 jd->huffbits[i][j] = 0;
WiredHome 115:c9862fd0c689 916 jd->huffcode[i][j] = 0;
WiredHome 115:c9862fd0c689 917 jd->huffdata[i][j] = 0;
WiredHome 115:c9862fd0c689 918 }
WiredHome 115:c9862fd0c689 919 }
WiredHome 115:c9862fd0c689 920 for (i = 0; i < 4; i++) jd->qttbl[i] = 0;
WiredHome 115:c9862fd0c689 921
WiredHome 115:c9862fd0c689 922 jd->inbuf = seg = (uint8_t *)alloc_pool(jd, JD_SZBUF); /* Allocate stream input buffer */
WiredHome 115:c9862fd0c689 923 if (!seg) {
WiredHome 115:c9862fd0c689 924 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 925 return JDR_MEM1;
WiredHome 115:c9862fd0c689 926 }
WiredHome 115:c9862fd0c689 927
WiredHome 115:c9862fd0c689 928 if (getJpegData(jd, seg, 2) != 2) {
WiredHome 115:c9862fd0c689 929 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 930 return JDR_INP;/* Check SOI marker */
WiredHome 115:c9862fd0c689 931 }
WiredHome 120:be2aaa3adf72 932 INFO("Checkpoint");
WiredHome 115:c9862fd0c689 933 HexDump("SOI marker", seg, 2);
WiredHome 115:c9862fd0c689 934 if (LDB_WORD(seg) != 0xFFD8) {
WiredHome 115:c9862fd0c689 935 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 936 return JDR_FMT1; /* Err: SOI is not detected */
WiredHome 115:c9862fd0c689 937 }
WiredHome 115:c9862fd0c689 938 ofs = 2;
WiredHome 115:c9862fd0c689 939
WiredHome 115:c9862fd0c689 940 for (;;) {
WiredHome 115:c9862fd0c689 941 /* Get a JPEG marker */
WiredHome 115:c9862fd0c689 942 if (getJpegData(jd, seg, 4) != 4) {
WiredHome 115:c9862fd0c689 943 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 944 return JDR_INP;
WiredHome 115:c9862fd0c689 945 }
WiredHome 115:c9862fd0c689 946 marker = LDB_WORD(seg); /* Marker */
WiredHome 115:c9862fd0c689 947 len = LDB_WORD(seg + 2); /* Length field */
WiredHome 115:c9862fd0c689 948 if (len <= 2 || (marker >> 8) != 0xFF) {
WiredHome 115:c9862fd0c689 949 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 950 return JDR_FMT1;
WiredHome 115:c9862fd0c689 951 }
WiredHome 115:c9862fd0c689 952 len -= 2; /* Content size excluding length field */
WiredHome 115:c9862fd0c689 953 ofs += 4 + len; /* Number of bytes loaded */
WiredHome 115:c9862fd0c689 954
WiredHome 115:c9862fd0c689 955 switch (marker & 0xFF) {
WiredHome 115:c9862fd0c689 956 case 0xC0: /* SOF0 (baseline JPEG) */
WiredHome 115:c9862fd0c689 957 /* Load segment data */
WiredHome 115:c9862fd0c689 958 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 959 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 960 return JDR_MEM2;
WiredHome 115:c9862fd0c689 961 }
WiredHome 115:c9862fd0c689 962 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 963 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 964 return JDR_INP;
WiredHome 115:c9862fd0c689 965 }
WiredHome 115:c9862fd0c689 966
WiredHome 115:c9862fd0c689 967 jd->width = LDB_WORD(seg+3); /* Image width in unit of pixel */
WiredHome 115:c9862fd0c689 968 jd->height = LDB_WORD(seg+1); /* Image height in unit of pixel */
WiredHome 115:c9862fd0c689 969 INFO("Image size(%d,%d)", jd->width, jd->height);
WiredHome 115:c9862fd0c689 970
WiredHome 115:c9862fd0c689 971 if (seg[5] != 3) {
WiredHome 115:c9862fd0c689 972 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 973 return JDR_FMT3; /* Err: Supports only Y/Cb/Cr format */
WiredHome 115:c9862fd0c689 974 }
WiredHome 115:c9862fd0c689 975
WiredHome 115:c9862fd0c689 976 /* Check three image components */
WiredHome 115:c9862fd0c689 977 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 978 b = seg[7 + 3 * i]; /* Get sampling factor */
WiredHome 115:c9862fd0c689 979 if (!i) { /* Y component */
WiredHome 115:c9862fd0c689 980 if (b != 0x11 && b != 0x22 && b != 0x21) {/* Check sampling factor */
WiredHome 115:c9862fd0c689 981 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 982 return JDR_FMT3; /* Err: Supports only 4:4:4, 4:2:0 or 4:2:2 */
WiredHome 115:c9862fd0c689 983 }
WiredHome 115:c9862fd0c689 984 jd->msx = b >> 4; jd->msy = b & 15; /* Size of MCU [blocks] */
WiredHome 115:c9862fd0c689 985 } else { /* Cb/Cr component */
WiredHome 115:c9862fd0c689 986 if (b != 0x11) {
WiredHome 115:c9862fd0c689 987 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 988 return JDR_FMT3; /* Err: Sampling factor of Cr/Cb must be 1 */
WiredHome 115:c9862fd0c689 989 }
WiredHome 115:c9862fd0c689 990 }
WiredHome 115:c9862fd0c689 991 b = seg[8 + 3 * i]; /* Get dequantizer table ID for this component */
WiredHome 115:c9862fd0c689 992 if (b > 3) {
WiredHome 115:c9862fd0c689 993 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 994 return JDR_FMT3; /* Err: Invalid ID */
WiredHome 115:c9862fd0c689 995 }
WiredHome 115:c9862fd0c689 996 jd->qtid[i] = b;
WiredHome 115:c9862fd0c689 997 }
WiredHome 115:c9862fd0c689 998 break;
WiredHome 115:c9862fd0c689 999
WiredHome 115:c9862fd0c689 1000 case 0xDD: /* DRI */
WiredHome 115:c9862fd0c689 1001 /* Load segment data */
WiredHome 115:c9862fd0c689 1002 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1003 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1004 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1005 }
WiredHome 115:c9862fd0c689 1006 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1007 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1008 return JDR_INP;
WiredHome 115:c9862fd0c689 1009 }
WiredHome 115:c9862fd0c689 1010
WiredHome 115:c9862fd0c689 1011 /* Get restart interval (MCUs) */
WiredHome 115:c9862fd0c689 1012 jd->nrst = LDB_WORD(seg);
WiredHome 115:c9862fd0c689 1013 break;
WiredHome 115:c9862fd0c689 1014
WiredHome 115:c9862fd0c689 1015 case 0xC4: /* DHT */
WiredHome 115:c9862fd0c689 1016 /* Load segment data */
WiredHome 115:c9862fd0c689 1017 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1018 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1019 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1020 }
WiredHome 115:c9862fd0c689 1021 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1022 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1023 return JDR_INP;
WiredHome 115:c9862fd0c689 1024 }
WiredHome 115:c9862fd0c689 1025
WiredHome 115:c9862fd0c689 1026 /* Create huffman tables */
WiredHome 115:c9862fd0c689 1027 INFO("next - create_huffman_tbl()");
WiredHome 115:c9862fd0c689 1028 rc = (JRESULT)create_huffman_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1029 if (rc) {
WiredHome 115:c9862fd0c689 1030 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1031 return rc;
WiredHome 115:c9862fd0c689 1032 }
WiredHome 115:c9862fd0c689 1033 break;
WiredHome 115:c9862fd0c689 1034
WiredHome 115:c9862fd0c689 1035 case 0xDB: /* DQT */
WiredHome 115:c9862fd0c689 1036 /* Load segment data */
WiredHome 115:c9862fd0c689 1037 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1038 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1039 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1040 }
WiredHome 115:c9862fd0c689 1041 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1042 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1043 return JDR_INP;
WiredHome 115:c9862fd0c689 1044 }
WiredHome 115:c9862fd0c689 1045
WiredHome 115:c9862fd0c689 1046 /* Create de-quantizer tables */
WiredHome 115:c9862fd0c689 1047 rc = (JRESULT)create_qt_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1048 if (rc) {
WiredHome 115:c9862fd0c689 1049 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1050 return rc;
WiredHome 115:c9862fd0c689 1051 }
WiredHome 115:c9862fd0c689 1052 break;
WiredHome 115:c9862fd0c689 1053
WiredHome 115:c9862fd0c689 1054 case 0xDA: /* SOS */
WiredHome 115:c9862fd0c689 1055 /* Load segment data */
WiredHome 115:c9862fd0c689 1056 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1057 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1058 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1059 }
WiredHome 115:c9862fd0c689 1060 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1061 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1062 return JDR_INP;
WiredHome 115:c9862fd0c689 1063 }
WiredHome 115:c9862fd0c689 1064
WiredHome 115:c9862fd0c689 1065 if (!jd->width || !jd->height) {
WiredHome 115:c9862fd0c689 1066 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1067 return JDR_FMT1; /* Err: Invalid image size */
WiredHome 115:c9862fd0c689 1068 }
WiredHome 115:c9862fd0c689 1069
WiredHome 115:c9862fd0c689 1070 if (seg[0] != 3) {
WiredHome 115:c9862fd0c689 1071 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1072 return JDR_FMT3; /* Err: Supports only three color components format */
WiredHome 115:c9862fd0c689 1073 }
WiredHome 115:c9862fd0c689 1074
WiredHome 115:c9862fd0c689 1075 /* Check if all tables corresponding to each components have been loaded */
WiredHome 115:c9862fd0c689 1076 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 1077 b = seg[2 + 2 * i]; /* Get huffman table ID */
WiredHome 115:c9862fd0c689 1078 if (b != 0x00 && b != 0x11) {
WiredHome 115:c9862fd0c689 1079 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1080 return JDR_FMT3; /* Err: Different table number for DC/AC element */
WiredHome 115:c9862fd0c689 1081 }
WiredHome 115:c9862fd0c689 1082 b = i ? 1 : 0;
WiredHome 115:c9862fd0c689 1083 if (!jd->huffbits[b][0] || !jd->huffbits[b][1]) { /* Check huffman table for this component */
WiredHome 115:c9862fd0c689 1084 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1085 return JDR_FMT1; /* Err: Huffman table not loaded */
WiredHome 115:c9862fd0c689 1086 }
WiredHome 115:c9862fd0c689 1087 if (!jd->qttbl[jd->qtid[i]]) {
WiredHome 115:c9862fd0c689 1088 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1089 return JDR_FMT1; /* Err: Dequantizer table not loaded */
WiredHome 115:c9862fd0c689 1090 }
WiredHome 115:c9862fd0c689 1091 }
WiredHome 115:c9862fd0c689 1092
WiredHome 115:c9862fd0c689 1093 /* Allocate working buffer for MCU and RGB */
WiredHome 115:c9862fd0c689 1094 n = jd->msy * jd->msx; /* Number of Y blocks in the MCU */
WiredHome 115:c9862fd0c689 1095 if (!n) {
WiredHome 115:c9862fd0c689 1096 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1097 return JDR_FMT1; /* Err: SOF0 has not been loaded */
WiredHome 115:c9862fd0c689 1098 }
WiredHome 115:c9862fd0c689 1099 len = n * 64 * 2 + 64; /* Allocate buffer for IDCT and RGB output */
WiredHome 115:c9862fd0c689 1100 if (len < 256) len = 256; /* but at least 256 byte is required for IDCT */
WiredHome 115:c9862fd0c689 1101 jd->workbuf = alloc_pool(jd, len); /* and it may occupy a part of following MCU working buffer for RGB output */
WiredHome 115:c9862fd0c689 1102 if (!jd->workbuf) {
WiredHome 115:c9862fd0c689 1103 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1104 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1105 }
WiredHome 115:c9862fd0c689 1106 jd->mcubuf = (uint8_t *)alloc_pool(jd, (n + 2) * 64); /* Allocate MCU working buffer */
WiredHome 115:c9862fd0c689 1107 if (!jd->mcubuf) {
WiredHome 115:c9862fd0c689 1108 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1109 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1110 }
WiredHome 115:c9862fd0c689 1111
WiredHome 115:c9862fd0c689 1112 /* Pre-load the JPEG data to extract it from the bit stream */
WiredHome 115:c9862fd0c689 1113 jd->dptr = seg; jd->dctr = 0; jd->dmsk = 0; /* Prepare to read bit stream */
WiredHome 115:c9862fd0c689 1114 if (ofs %= JD_SZBUF) { /* Align read offset to JD_SZBUF */
WiredHome 115:c9862fd0c689 1115 jd->dctr = getJpegData(jd, seg + ofs, JD_SZBUF - (uint16_t)ofs);
WiredHome 115:c9862fd0c689 1116 jd->dptr = seg + ofs - 1;
WiredHome 115:c9862fd0c689 1117 }
WiredHome 115:c9862fd0c689 1118
WiredHome 115:c9862fd0c689 1119 return JDR_OK; /* Initialization succeeded. Ready to decompress the JPEG image. */
WiredHome 115:c9862fd0c689 1120
WiredHome 115:c9862fd0c689 1121 case 0xC1: /* SOF1 */
WiredHome 115:c9862fd0c689 1122 case 0xC2: /* SOF2 */
WiredHome 115:c9862fd0c689 1123 case 0xC3: /* SOF3 */
WiredHome 115:c9862fd0c689 1124 case 0xC5: /* SOF5 */
WiredHome 115:c9862fd0c689 1125 case 0xC6: /* SOF6 */
WiredHome 115:c9862fd0c689 1126 case 0xC7: /* SOF7 */
WiredHome 115:c9862fd0c689 1127 case 0xC9: /* SOF9 */
WiredHome 115:c9862fd0c689 1128 case 0xCA: /* SOF10 */
WiredHome 115:c9862fd0c689 1129 case 0xCB: /* SOF11 */
WiredHome 115:c9862fd0c689 1130 case 0xCD: /* SOF13 */
WiredHome 115:c9862fd0c689 1131 case 0xCE: /* SOF14 */
WiredHome 115:c9862fd0c689 1132 case 0xCF: /* SOF15 */
WiredHome 115:c9862fd0c689 1133 case 0xD9: /* EOI */
WiredHome 115:c9862fd0c689 1134 return JDR_FMT3; /* Unsuppoted JPEG standard (may be progressive JPEG) */
WiredHome 115:c9862fd0c689 1135
WiredHome 115:c9862fd0c689 1136 default: /* Unknown segment (comment, exif or etc..) */
WiredHome 115:c9862fd0c689 1137 /* Skip segment data */
WiredHome 115:c9862fd0c689 1138 if (getJpegData(jd, 0, len) != len) { /* Null pointer specifies to skip bytes of stream */
WiredHome 115:c9862fd0c689 1139 INFO("Unknown segment");
WiredHome 115:c9862fd0c689 1140 return JDR_INP;
WiredHome 115:c9862fd0c689 1141 }
WiredHome 115:c9862fd0c689 1142 }
WiredHome 115:c9862fd0c689 1143 }
WiredHome 115:c9862fd0c689 1144 }
WiredHome 115:c9862fd0c689 1145
WiredHome 115:c9862fd0c689 1146
WiredHome 115:c9862fd0c689 1147
WiredHome 115:c9862fd0c689 1148
WiredHome 115:c9862fd0c689 1149 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 1150 /* Start to decompress the JPEG picture */
WiredHome 115:c9862fd0c689 1151 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 1152
WiredHome 115:c9862fd0c689 1153 JRESULT GraphicsDisplay::jd_decomp (
WiredHome 115:c9862fd0c689 1154 JDEC * jd, /* Initialized decompression object */
WiredHome 115:c9862fd0c689 1155 uint16_t (*outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 1156 uint8_t scale /* Output de-scaling factor (0 to 3) */
WiredHome 115:c9862fd0c689 1157 )
WiredHome 115:c9862fd0c689 1158 {
WiredHome 115:c9862fd0c689 1159 uint16_t x, y, mx, my;
WiredHome 115:c9862fd0c689 1160 uint16_t rst, rsc;
WiredHome 115:c9862fd0c689 1161 JRESULT rc;
WiredHome 115:c9862fd0c689 1162
WiredHome 118:34eb0b64fc61 1163 INFO("jd_decomp(%p,%p,%d)", jd, outfunc, scale);
WiredHome 118:34eb0b64fc61 1164 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 1165
WiredHome 115:c9862fd0c689 1166 if (scale > (JD_USE_SCALE ? 3 : 0)) return JDR_PAR;
WiredHome 115:c9862fd0c689 1167 jd->scale = scale;
WiredHome 115:c9862fd0c689 1168
WiredHome 115:c9862fd0c689 1169 mx = jd->msx * 8; my = jd->msy * 8; /* Size of the MCU (pixel) */
WiredHome 115:c9862fd0c689 1170
WiredHome 115:c9862fd0c689 1171 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0; /* Initialize DC values */
WiredHome 115:c9862fd0c689 1172 rst = rsc = 0;
WiredHome 115:c9862fd0c689 1173
WiredHome 115:c9862fd0c689 1174 rc = JDR_OK;
WiredHome 115:c9862fd0c689 1175 for (y = 0; y < jd->height; y += my) { /* Vertical loop of MCUs */
WiredHome 115:c9862fd0c689 1176 for (x = 0; x < jd->width; x += mx) { /* Horizontal loop of MCUs */
WiredHome 115:c9862fd0c689 1177 if (jd->nrst && rst++ == jd->nrst) { /* Process restart interval if enabled */
WiredHome 115:c9862fd0c689 1178 rc = restart(jd, rsc++);
WiredHome 115:c9862fd0c689 1179 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1180 rst = 1;
WiredHome 115:c9862fd0c689 1181 }
WiredHome 115:c9862fd0c689 1182 rc = mcu_load(jd); /* Load an MCU (decompress huffman coded stream and apply IDCT) */
WiredHome 115:c9862fd0c689 1183 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1184 rc = mcu_output(jd, outfunc, x, y); /* Output the MCU (color space conversion, scaling and output) */
WiredHome 115:c9862fd0c689 1185 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1186 }
WiredHome 115:c9862fd0c689 1187 }
WiredHome 115:c9862fd0c689 1188
WiredHome 115:c9862fd0c689 1189 return rc;
WiredHome 115:c9862fd0c689 1190 }