Kerry Martin / RA8875

KSM edits to RA8875

Dependents:   Liz_Test_Code

GraphicsDisplayJPEG.cpp@115:c9862fd0c689, 2016-05-16 (annotated)

Committer:
WiredHome
Date:
Mon May 16 02:05:37 2016 +0000
Revision:
115:c9862fd0c689
Child:
116:43e5bd2d7302
Jpeg rendering - not yet working, just an intermediate check-point.

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