Kerry Martin / RA8875

KSM edits to RA8875

Dependents:   Liz_Test_Code

GraphicsDisplayJPEG.cpp@119:d129b798f82f, 2016-05-16 (annotated)

Committer:
WiredHome
Date:
Mon May 16 21:30:35 2016 +0000
Revision:
119:d129b798f82f
Parent:
118:34eb0b64fc61
Child:
120:be2aaa3adf72
Not working - add 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 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 117:6710b8e196f0 243 INFO("create_huffman_tbl(%p,%p,%d)", jd, data, ndata);
WiredHome 117:6710b8e196f0 244 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 115:c9862fd0c689 245 while (ndata) { /* Process all tables in the segment */
WiredHome 115:c9862fd0c689 246 if (ndata < 17) return JDR_FMT1; /* Err: wrong data size */
WiredHome 115:c9862fd0c689 247 ndata -= 17;
WiredHome 115:c9862fd0c689 248 d = *data++; /* Get table number and class */
WiredHome 115:c9862fd0c689 249 cls = (d >> 4); num = d & 0x0F; /* class = dc(0)/ac(1), table number = 0/1 */
WiredHome 115:c9862fd0c689 250 if (d & 0xEE) return JDR_FMT1; /* Err: invalid class/number */
WiredHome 115:c9862fd0c689 251 pb = (uint8_t *)alloc_pool(jd, 16); /* Allocate a memory block for the bit distribution table */
WiredHome 115:c9862fd0c689 252 if (!pb) {
WiredHome 115:c9862fd0c689 253 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 254 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 255 }
WiredHome 115:c9862fd0c689 256 jd->huffbits[num][cls] = pb;
WiredHome 115:c9862fd0c689 257 for (np = i = 0; i < 16; i++) { /* Load number of patterns for 1 to 16-bit code */
WiredHome 115:c9862fd0c689 258 pb[i] = b = *data++;
WiredHome 115:c9862fd0c689 259 np += b; /* Get sum of code words for each code */
WiredHome 115:c9862fd0c689 260 }
WiredHome 115:c9862fd0c689 261
WiredHome 115:c9862fd0c689 262 ph = (uint16_t *)alloc_pool(jd, np * sizeof (uint16_t));/* Allocate a memory block for the code word table */
WiredHome 115:c9862fd0c689 263 if (!ph) {
WiredHome 115:c9862fd0c689 264 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 265 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 266 }
WiredHome 118:34eb0b64fc61 267 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 268 jd->huffcode[num][cls] = ph;
WiredHome 118:34eb0b64fc61 269 //INFO("jd->pool: %p, %p", jd->pool, ph);
WiredHome 115:c9862fd0c689 270 hc = 0;
WiredHome 115:c9862fd0c689 271 for (j = i = 0; i < 16; i++) { /* Re-build huffman code word table */
WiredHome 115:c9862fd0c689 272 b = pb[i];
WiredHome 115:c9862fd0c689 273 while (b--) ph[j++] = hc++;
WiredHome 115:c9862fd0c689 274 hc <<= 1;
WiredHome 115:c9862fd0c689 275 INFO("jd->pool: %d: %p, %p", i, jd->pool, ph);
WiredHome 115:c9862fd0c689 276 }
WiredHome 118:34eb0b64fc61 277 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 278
WiredHome 115:c9862fd0c689 279 if (ndata < np) return JDR_FMT1; /* Err: wrong data size */
WiredHome 115:c9862fd0c689 280 ndata -= np;
WiredHome 118:34eb0b64fc61 281 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 282 pd = (uint8_t *)alloc_pool(jd, np); /* Allocate a memory block for the decoded data */
WiredHome 118:34eb0b64fc61 283 //INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 284 if (!pd) {
WiredHome 115:c9862fd0c689 285 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 286 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 287 }
WiredHome 115:c9862fd0c689 288 jd->huffdata[num][cls] = pd;
WiredHome 115:c9862fd0c689 289 for (i = 0; i < np; i++) { /* Load decoded data corresponds to each code ward */
WiredHome 115:c9862fd0c689 290 d = *data++;
WiredHome 115:c9862fd0c689 291 if (!cls && d > 11) return JDR_FMT1;
WiredHome 115:c9862fd0c689 292 *pd++ = d;
WiredHome 115:c9862fd0c689 293 }
WiredHome 115:c9862fd0c689 294 }
WiredHome 115:c9862fd0c689 295
WiredHome 115:c9862fd0c689 296 return JDR_OK;
WiredHome 115:c9862fd0c689 297 }
WiredHome 115:c9862fd0c689 298
WiredHome 115:c9862fd0c689 299
WiredHome 115:c9862fd0c689 300
WiredHome 115:c9862fd0c689 301
WiredHome 115:c9862fd0c689 302 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 303 /* Extract N bits from input stream */
WiredHome 115:c9862fd0c689 304 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 305
WiredHome 115:c9862fd0c689 306 int16_t GraphicsDisplay::bitext ( /* >=0: extracted data, <0: error code */
WiredHome 115:c9862fd0c689 307 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 308 uint16_t nbit /* Number of bits to extract (1 to 11) */
WiredHome 115:c9862fd0c689 309 )
WiredHome 115:c9862fd0c689 310 {
WiredHome 115:c9862fd0c689 311 uint8_t msk, s, *dp;
WiredHome 115:c9862fd0c689 312 uint16_t dc, v, f;
WiredHome 115:c9862fd0c689 313
WiredHome 115:c9862fd0c689 314
WiredHome 115:c9862fd0c689 315 msk = jd->dmsk; dc = jd->dctr; dp = jd->dptr; /* Bit mask, number of data available, read ptr */
WiredHome 115:c9862fd0c689 316 s = *dp; v = f = 0;
WiredHome 115:c9862fd0c689 317 do {
WiredHome 115:c9862fd0c689 318 if (!msk) { /* Next byte? */
WiredHome 115:c9862fd0c689 319 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 320 dp = jd->inbuf; /* Top of input buffer */
WiredHome 115:c9862fd0c689 321 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 322 if (!dc) return 0 - (int16_t)JDR_INP; /* Err: read error or wrong stream termination */
WiredHome 115:c9862fd0c689 323 } else {
WiredHome 115:c9862fd0c689 324 dp++; /* Next data ptr */
WiredHome 115:c9862fd0c689 325 }
WiredHome 115:c9862fd0c689 326 dc--; /* Decrement number of available bytes */
WiredHome 115:c9862fd0c689 327 if (f) { /* In flag sequence? */
WiredHome 115:c9862fd0c689 328 f = 0; /* Exit flag sequence */
WiredHome 115:c9862fd0c689 329 if (*dp != 0) return 0 - (int16_t)JDR_FMT1; /* Err: unexpected flag is detected (may be collapted data) */
WiredHome 115:c9862fd0c689 330 *dp = s = 0xFF; /* The flag is a data 0xFF */
WiredHome 115:c9862fd0c689 331 } else {
WiredHome 115:c9862fd0c689 332 s = *dp; /* Get next data byte */
WiredHome 115:c9862fd0c689 333 if (s == 0xFF) { /* Is start of flag sequence? */
WiredHome 115:c9862fd0c689 334 f = 1; continue; /* Enter flag sequence */
WiredHome 115:c9862fd0c689 335 }
WiredHome 115:c9862fd0c689 336 }
WiredHome 115:c9862fd0c689 337 msk = 0x80; /* Read from MSB */
WiredHome 115:c9862fd0c689 338 }
WiredHome 115:c9862fd0c689 339 v <<= 1; /* Get a bit */
WiredHome 115:c9862fd0c689 340 if (s & msk) v++;
WiredHome 115:c9862fd0c689 341 msk >>= 1;
WiredHome 115:c9862fd0c689 342 nbit--;
WiredHome 115:c9862fd0c689 343 } while (nbit);
WiredHome 115:c9862fd0c689 344 jd->dmsk = msk; jd->dctr = dc; jd->dptr = dp;
WiredHome 115:c9862fd0c689 345
WiredHome 115:c9862fd0c689 346 return (int16_t)v;
WiredHome 115:c9862fd0c689 347 }
WiredHome 115:c9862fd0c689 348
WiredHome 115:c9862fd0c689 349
WiredHome 115:c9862fd0c689 350
WiredHome 115:c9862fd0c689 351
WiredHome 115:c9862fd0c689 352 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 353 /* Extract a huffman decoded data from input stream */
WiredHome 115:c9862fd0c689 354 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 355
WiredHome 115:c9862fd0c689 356 int16_t GraphicsDisplay::huffext ( /* >=0: decoded data, <0: error code */
WiredHome 115:c9862fd0c689 357 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 358 const uint8_t * hbits, /* Pointer to the bit distribution table */
WiredHome 115:c9862fd0c689 359 const uint16_t * hcode, /* Pointer to the code word table */
WiredHome 115:c9862fd0c689 360 const uint8_t * hdata /* Pointer to the data table */
WiredHome 115:c9862fd0c689 361 )
WiredHome 115:c9862fd0c689 362 {
WiredHome 115:c9862fd0c689 363 uint8_t msk, s, *dp;
WiredHome 115:c9862fd0c689 364 uint16_t dc, v, f, bl, nd;
WiredHome 115:c9862fd0c689 365
WiredHome 115:c9862fd0c689 366
WiredHome 115:c9862fd0c689 367 msk = jd->dmsk; dc = jd->dctr; dp = jd->dptr; /* Bit mask, number of data available, read ptr */
WiredHome 115:c9862fd0c689 368 s = *dp; v = f = 0;
WiredHome 115:c9862fd0c689 369 bl = 16; /* Max code length */
WiredHome 115:c9862fd0c689 370 do {
WiredHome 115:c9862fd0c689 371 if (!msk) { /* Next byte? */
WiredHome 115:c9862fd0c689 372 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 373 dp = jd->inbuf; /* Top of input buffer */
WiredHome 115:c9862fd0c689 374 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 375 if (!dc) return 0 - (int16_t)JDR_INP; /* Err: read error or wrong stream termination */
WiredHome 115:c9862fd0c689 376 } else {
WiredHome 115:c9862fd0c689 377 dp++; /* Next data ptr */
WiredHome 115:c9862fd0c689 378 }
WiredHome 115:c9862fd0c689 379 dc--; /* Decrement number of available bytes */
WiredHome 115:c9862fd0c689 380 if (f) { /* In flag sequence? */
WiredHome 115:c9862fd0c689 381 f = 0; /* Exit flag sequence */
WiredHome 115:c9862fd0c689 382 if (*dp != 0)
WiredHome 115:c9862fd0c689 383 return 0 - (int16_t)JDR_FMT1; /* Err: unexpected flag is detected (may be collapted data) */
WiredHome 115:c9862fd0c689 384 *dp = s = 0xFF; /* The flag is a data 0xFF */
WiredHome 115:c9862fd0c689 385 } else {
WiredHome 115:c9862fd0c689 386 s = *dp; /* Get next data byte */
WiredHome 115:c9862fd0c689 387 if (s == 0xFF) { /* Is start of flag sequence? */
WiredHome 115:c9862fd0c689 388 f = 1; continue; /* Enter flag sequence, get trailing byte */
WiredHome 115:c9862fd0c689 389 }
WiredHome 115:c9862fd0c689 390 }
WiredHome 115:c9862fd0c689 391 msk = 0x80; /* Read from MSB */
WiredHome 115:c9862fd0c689 392 }
WiredHome 115:c9862fd0c689 393 v <<= 1; /* Get a bit */
WiredHome 115:c9862fd0c689 394 if (s & msk) v++;
WiredHome 115:c9862fd0c689 395 msk >>= 1;
WiredHome 115:c9862fd0c689 396
WiredHome 115:c9862fd0c689 397 for (nd = *hbits++; nd; nd--) { /* Search the code word in this bit length */
WiredHome 115:c9862fd0c689 398 if (v == *hcode++) { /* Matched? */
WiredHome 115:c9862fd0c689 399 jd->dmsk = msk; jd->dctr = dc; jd->dptr = dp;
WiredHome 115:c9862fd0c689 400 return *hdata; /* Return the decoded data */
WiredHome 115:c9862fd0c689 401 }
WiredHome 115:c9862fd0c689 402 hdata++;
WiredHome 115:c9862fd0c689 403 }
WiredHome 115:c9862fd0c689 404 bl--;
WiredHome 115:c9862fd0c689 405 } while (bl);
WiredHome 115:c9862fd0c689 406
WiredHome 115:c9862fd0c689 407 return 0 - (int16_t)JDR_FMT1; /* Err: code not found (may be collapted data) */
WiredHome 115:c9862fd0c689 408 }
WiredHome 115:c9862fd0c689 409
WiredHome 115:c9862fd0c689 410
WiredHome 115:c9862fd0c689 411
WiredHome 115:c9862fd0c689 412
WiredHome 115:c9862fd0c689 413 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 414 /* Apply Inverse-DCT in Arai Algorithm (see also aa_idct.png) */
WiredHome 115:c9862fd0c689 415 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 416
WiredHome 115:c9862fd0c689 417 static
WiredHome 115:c9862fd0c689 418 void block_idct (
WiredHome 115:c9862fd0c689 419 int32_t * src, /* Input block data (de-quantized and pre-scaled for Arai Algorithm) */
WiredHome 115:c9862fd0c689 420 uint8_t * dst /* Pointer to the destination to store the block as byte array */
WiredHome 115:c9862fd0c689 421 )
WiredHome 115:c9862fd0c689 422 {
WiredHome 115:c9862fd0c689 423 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 424 int32_t v0, v1, v2, v3, v4, v5, v6, v7;
WiredHome 115:c9862fd0c689 425 int32_t t10, t11, t12, t13;
WiredHome 115:c9862fd0c689 426 uint16_t i;
WiredHome 115:c9862fd0c689 427
WiredHome 115:c9862fd0c689 428 /* Process columns */
WiredHome 115:c9862fd0c689 429 for (i = 0; i < 8; i++) {
WiredHome 115:c9862fd0c689 430 v0 = src[8 * 0]; /* Get even elements */
WiredHome 115:c9862fd0c689 431 v1 = src[8 * 2];
WiredHome 115:c9862fd0c689 432 v2 = src[8 * 4];
WiredHome 115:c9862fd0c689 433 v3 = src[8 * 6];
WiredHome 115:c9862fd0c689 434
WiredHome 115:c9862fd0c689 435 t10 = v0 + v2; /* Process the even elements */
WiredHome 115:c9862fd0c689 436 t12 = v0 - v2;
WiredHome 115:c9862fd0c689 437 t11 = (v1 - v3) * M13 >> 12;
WiredHome 115:c9862fd0c689 438 v3 += v1;
WiredHome 115:c9862fd0c689 439 t11 -= v3;
WiredHome 115:c9862fd0c689 440 v0 = t10 + v3;
WiredHome 115:c9862fd0c689 441 v3 = t10 - v3;
WiredHome 115:c9862fd0c689 442 v1 = t11 + t12;
WiredHome 115:c9862fd0c689 443 v2 = t12 - t11;
WiredHome 115:c9862fd0c689 444
WiredHome 115:c9862fd0c689 445 v4 = src[8 * 7]; /* Get odd elements */
WiredHome 115:c9862fd0c689 446 v5 = src[8 * 1];
WiredHome 115:c9862fd0c689 447 v6 = src[8 * 5];
WiredHome 115:c9862fd0c689 448 v7 = src[8 * 3];
WiredHome 115:c9862fd0c689 449
WiredHome 115:c9862fd0c689 450 t10 = v5 - v4; /* Process the odd elements */
WiredHome 115:c9862fd0c689 451 t11 = v5 + v4;
WiredHome 115:c9862fd0c689 452 t12 = v6 - v7;
WiredHome 115:c9862fd0c689 453 v7 += v6;
WiredHome 115:c9862fd0c689 454 v5 = (t11 - v7) * M13 >> 12;
WiredHome 115:c9862fd0c689 455 v7 += t11;
WiredHome 115:c9862fd0c689 456 t13 = (t10 + t12) * M5 >> 12;
WiredHome 115:c9862fd0c689 457 v4 = t13 - (t10 * M2 >> 12);
WiredHome 115:c9862fd0c689 458 v6 = t13 - (t12 * M4 >> 12) - v7;
WiredHome 115:c9862fd0c689 459 v5 -= v6;
WiredHome 115:c9862fd0c689 460 v4 -= v5;
WiredHome 115:c9862fd0c689 461
WiredHome 115:c9862fd0c689 462 src[8 * 0] = v0 + v7; /* Write-back transformed values */
WiredHome 115:c9862fd0c689 463 src[8 * 7] = v0 - v7;
WiredHome 115:c9862fd0c689 464 src[8 * 1] = v1 + v6;
WiredHome 115:c9862fd0c689 465 src[8 * 6] = v1 - v6;
WiredHome 115:c9862fd0c689 466 src[8 * 2] = v2 + v5;
WiredHome 115:c9862fd0c689 467 src[8 * 5] = v2 - v5;
WiredHome 115:c9862fd0c689 468 src[8 * 3] = v3 + v4;
WiredHome 115:c9862fd0c689 469 src[8 * 4] = v3 - v4;
WiredHome 115:c9862fd0c689 470
WiredHome 115:c9862fd0c689 471 src++; /* Next column */
WiredHome 115:c9862fd0c689 472 }
WiredHome 115:c9862fd0c689 473
WiredHome 115:c9862fd0c689 474 /* Process rows */
WiredHome 115:c9862fd0c689 475 src -= 8;
WiredHome 115:c9862fd0c689 476 for (i = 0; i < 8; i++) {
WiredHome 115:c9862fd0c689 477 v0 = src[0] + (128L << 8); /* Get even elements (remove DC offset (-128) here) */
WiredHome 115:c9862fd0c689 478 v1 = src[2];
WiredHome 115:c9862fd0c689 479 v2 = src[4];
WiredHome 115:c9862fd0c689 480 v3 = src[6];
WiredHome 115:c9862fd0c689 481
WiredHome 115:c9862fd0c689 482 t10 = v0 + v2; /* Process the even elements */
WiredHome 115:c9862fd0c689 483 t12 = v0 - v2;
WiredHome 115:c9862fd0c689 484 t11 = (v1 - v3) * M13 >> 12;
WiredHome 115:c9862fd0c689 485 v3 += v1;
WiredHome 115:c9862fd0c689 486 t11 -= v3;
WiredHome 115:c9862fd0c689 487 v0 = t10 + v3;
WiredHome 115:c9862fd0c689 488 v3 = t10 - v3;
WiredHome 115:c9862fd0c689 489 v1 = t11 + t12;
WiredHome 115:c9862fd0c689 490 v2 = t12 - t11;
WiredHome 115:c9862fd0c689 491
WiredHome 115:c9862fd0c689 492 v4 = src[7]; /* Get odd elements */
WiredHome 115:c9862fd0c689 493 v5 = src[1];
WiredHome 115:c9862fd0c689 494 v6 = src[5];
WiredHome 115:c9862fd0c689 495 v7 = src[3];
WiredHome 115:c9862fd0c689 496
WiredHome 115:c9862fd0c689 497 t10 = v5 - v4; /* Process the odd elements */
WiredHome 115:c9862fd0c689 498 t11 = v5 + v4;
WiredHome 115:c9862fd0c689 499 t12 = v6 - v7;
WiredHome 115:c9862fd0c689 500 v7 += v6;
WiredHome 115:c9862fd0c689 501 v5 = (t11 - v7) * M13 >> 12;
WiredHome 115:c9862fd0c689 502 v7 += t11;
WiredHome 115:c9862fd0c689 503 t13 = (t10 + t12) * M5 >> 12;
WiredHome 115:c9862fd0c689 504 v4 = t13 - (t10 * M2 >> 12);
WiredHome 115:c9862fd0c689 505 v6 = t13 - (t12 * M4 >> 12) - v7;
WiredHome 115:c9862fd0c689 506 v5 -= v6;
WiredHome 115:c9862fd0c689 507 v4 -= v5;
WiredHome 115:c9862fd0c689 508
WiredHome 115:c9862fd0c689 509 dst[0] = BYTECLIP((v0 + v7) >> 8); /* Descale the transformed values 8 bits and output */
WiredHome 115:c9862fd0c689 510 dst[7] = BYTECLIP((v0 - v7) >> 8);
WiredHome 115:c9862fd0c689 511 dst[1] = BYTECLIP((v1 + v6) >> 8);
WiredHome 115:c9862fd0c689 512 dst[6] = BYTECLIP((v1 - v6) >> 8);
WiredHome 115:c9862fd0c689 513 dst[2] = BYTECLIP((v2 + v5) >> 8);
WiredHome 115:c9862fd0c689 514 dst[5] = BYTECLIP((v2 - v5) >> 8);
WiredHome 115:c9862fd0c689 515 dst[3] = BYTECLIP((v3 + v4) >> 8);
WiredHome 115:c9862fd0c689 516 dst[4] = BYTECLIP((v3 - v4) >> 8);
WiredHome 115:c9862fd0c689 517 dst += 8;
WiredHome 115:c9862fd0c689 518
WiredHome 115:c9862fd0c689 519 src += 8; /* Next row */
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 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 527 /* Load all blocks in the MCU into working buffer */
WiredHome 115:c9862fd0c689 528 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 529
WiredHome 115:c9862fd0c689 530 JRESULT GraphicsDisplay::mcu_load (
WiredHome 115:c9862fd0c689 531 JDEC * jd /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 532 )
WiredHome 115:c9862fd0c689 533 {
WiredHome 115:c9862fd0c689 534 int32_t *tmp = (int32_t *)jd->workbuf; /* Block working buffer for de-quantize and IDCT */
WiredHome 115:c9862fd0c689 535 uint16_t blk, nby, nbc, i, z, id, cmp;
WiredHome 115:c9862fd0c689 536 int16_t b, d, e;
WiredHome 115:c9862fd0c689 537 uint8_t *bp;
WiredHome 115:c9862fd0c689 538 const uint8_t *hb, *hd;
WiredHome 115:c9862fd0c689 539 const uint16_t *hc;
WiredHome 115:c9862fd0c689 540 const int32_t *dqf;
WiredHome 115:c9862fd0c689 541
WiredHome 118:34eb0b64fc61 542 INFO("mcu_load");
WiredHome 118:34eb0b64fc61 543 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 544
WiredHome 115:c9862fd0c689 545 nby = jd->msx * jd->msy; /* Number of Y blocks (1, 2 or 4) */
WiredHome 115:c9862fd0c689 546 nbc = 2; /* Number of C blocks (2) */
WiredHome 115:c9862fd0c689 547 bp = jd->mcubuf; /* Pointer to the first block */
WiredHome 115:c9862fd0c689 548
WiredHome 115:c9862fd0c689 549 for (blk = 0; blk < nby + nbc; blk++) {
WiredHome 115:c9862fd0c689 550 cmp = (blk < nby) ? 0 : blk - nby + 1; /* Component number 0:Y, 1:Cb, 2:Cr */
WiredHome 115:c9862fd0c689 551 id = cmp ? 1 : 0; /* Huffman table ID of the component */
WiredHome 115:c9862fd0c689 552
WiredHome 115:c9862fd0c689 553 /* Extract a DC element from input stream */
WiredHome 115:c9862fd0c689 554 hb = jd->huffbits[id][0]; /* Huffman table for the DC element */
WiredHome 115:c9862fd0c689 555 hc = jd->huffcode[id][0];
WiredHome 115:c9862fd0c689 556 hd = jd->huffdata[id][0];
WiredHome 115:c9862fd0c689 557 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded data (bit length) */
WiredHome 115:c9862fd0c689 558 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input */
WiredHome 115:c9862fd0c689 559 d = jd->dcv[cmp]; /* DC value of previous block */
WiredHome 115:c9862fd0c689 560 if (b) { /* If there is any difference from previous block */
WiredHome 115:c9862fd0c689 561 e = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 562 if (e < 0) return (JRESULT)(0 - e); /* Err: input */
WiredHome 115:c9862fd0c689 563 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 564 if (!(e & b)) e -= (b << 1) - 1; /* Restore sign if needed */
WiredHome 115:c9862fd0c689 565 d += e; /* Get current value */
WiredHome 115:c9862fd0c689 566 jd->dcv[cmp] = (int16_t)d; /* Save current DC value for next block */
WiredHome 115:c9862fd0c689 567 }
WiredHome 115:c9862fd0c689 568 dqf = jd->qttbl[jd->qtid[cmp]]; /* De-quantizer table ID for this component */
WiredHome 115:c9862fd0c689 569 tmp[0] = d * dqf[0] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 570
WiredHome 115:c9862fd0c689 571 /* Extract following 63 AC elements from input stream */
WiredHome 115:c9862fd0c689 572 for (i = 1; i < 64; i++) tmp[i] = 0; /* Clear rest of elements */
WiredHome 115:c9862fd0c689 573 hb = jd->huffbits[id][1]; /* Huffman table for the AC elements */
WiredHome 115:c9862fd0c689 574 hc = jd->huffcode[id][1];
WiredHome 115:c9862fd0c689 575 hd = jd->huffdata[id][1];
WiredHome 115:c9862fd0c689 576 i = 1; /* Top of the AC elements */
WiredHome 115:c9862fd0c689 577 do {
WiredHome 115:c9862fd0c689 578 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded value (zero runs and bit length) */
WiredHome 115:c9862fd0c689 579 if (b == 0) break; /* EOB? */
WiredHome 115:c9862fd0c689 580 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input error */
WiredHome 115:c9862fd0c689 581 z = (uint16_t)b >> 4; /* Number of leading zero elements */
WiredHome 115:c9862fd0c689 582 if (z) {
WiredHome 115:c9862fd0c689 583 i += z; /* Skip zero elements */
WiredHome 115:c9862fd0c689 584 if (i >= 64) return JDR_FMT1; /* Too long zero run */
WiredHome 115:c9862fd0c689 585 }
WiredHome 115:c9862fd0c689 586 if (b &= 0x0F) { /* Bit length */
WiredHome 115:c9862fd0c689 587 d = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 588 if (d < 0) return (JRESULT)(0 - d); /* Err: input device */
WiredHome 115:c9862fd0c689 589 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 590 if (!(d & b)) d -= (b << 1) - 1;/* Restore negative value if needed */
WiredHome 115:c9862fd0c689 591 z = ZIG(i); /* Zigzag-order to raster-order converted index */
WiredHome 115:c9862fd0c689 592 tmp[z] = d * dqf[z] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 593 }
WiredHome 115:c9862fd0c689 594 } while (++i < 64); /* Next AC element */
WiredHome 115:c9862fd0c689 595
WiredHome 115:c9862fd0c689 596 if (JD_USE_SCALE && jd->scale == 3)
WiredHome 115:c9862fd0c689 597 *bp = (*tmp / 256) + 128; /* If scale ratio is 1/8, IDCT can be ommited and only DC element is used */
WiredHome 115:c9862fd0c689 598 else
WiredHome 115:c9862fd0c689 599 block_idct(tmp, bp); /* Apply IDCT and store the block to the MCU buffer */
WiredHome 115:c9862fd0c689 600
WiredHome 115:c9862fd0c689 601 bp += 64; /* Next block */
WiredHome 115:c9862fd0c689 602 }
WiredHome 115:c9862fd0c689 603
WiredHome 115:c9862fd0c689 604 return JDR_OK; /* All blocks have been loaded successfully */
WiredHome 115:c9862fd0c689 605 }
WiredHome 115:c9862fd0c689 606
WiredHome 115:c9862fd0c689 607
WiredHome 115:c9862fd0c689 608
WiredHome 115:c9862fd0c689 609
WiredHome 115:c9862fd0c689 610 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 611 /* Output an MCU: Convert YCrCb to RGB and output it in RGB form */
WiredHome 115:c9862fd0c689 612 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 613
WiredHome 115:c9862fd0c689 614 JRESULT GraphicsDisplay::mcu_output (
WiredHome 115:c9862fd0c689 615 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 616 uint16_t (* outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 617 uint16_t x, /* MCU position in the image (left of the MCU) */
WiredHome 115:c9862fd0c689 618 uint16_t y /* MCU position in the image (top of the MCU) */
WiredHome 115:c9862fd0c689 619 )
WiredHome 115:c9862fd0c689 620 {
WiredHome 115:c9862fd0c689 621 const int16_t CVACC = (sizeof (int16_t) > 2) ? 1024 : 128;
WiredHome 115:c9862fd0c689 622 uint16_t ix, iy, mx, my, rx, ry;
WiredHome 115:c9862fd0c689 623 int16_t yy, cb, cr;
WiredHome 115:c9862fd0c689 624 uint8_t *py, *pc, *rgb24;
WiredHome 115:c9862fd0c689 625 JRECT rect;
WiredHome 115:c9862fd0c689 626
WiredHome 118:34eb0b64fc61 627 INFO("mcu_output(%p,%p,%d,%d)", jd, outfunc, x, y);
WiredHome 118:34eb0b64fc61 628 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 629
WiredHome 115:c9862fd0c689 630 mx = jd->msx * 8; my = jd->msy * 8; /* MCU size (pixel) */
WiredHome 115:c9862fd0c689 631 rx = (x + mx <= jd->width) ? mx : jd->width - x; /* Output rectangular size (it may be clipped at right/bottom end) */
WiredHome 115:c9862fd0c689 632 ry = (y + my <= jd->height) ? my : jd->height - y;
WiredHome 115:c9862fd0c689 633 if (JD_USE_SCALE) {
WiredHome 115:c9862fd0c689 634 rx >>= jd->scale; ry >>= jd->scale;
WiredHome 115:c9862fd0c689 635 if (!rx || !ry) return JDR_OK; /* Skip this MCU if all pixel is to be rounded off */
WiredHome 115:c9862fd0c689 636 x >>= jd->scale; y >>= jd->scale;
WiredHome 115:c9862fd0c689 637 }
WiredHome 115:c9862fd0c689 638 rect.left = x; rect.right = x + rx - 1; /* Rectangular area in the frame buffer */
WiredHome 115:c9862fd0c689 639 rect.top = y; rect.bottom = y + ry - 1;
WiredHome 115:c9862fd0c689 640
WiredHome 115:c9862fd0c689 641
WiredHome 115:c9862fd0c689 642 if (!JD_USE_SCALE || jd->scale != 3) { /* Not for 1/8 scaling */
WiredHome 115:c9862fd0c689 643
WiredHome 115:c9862fd0c689 644 /* Build an RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 645 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 646 for (iy = 0; iy < my; iy++) {
WiredHome 115:c9862fd0c689 647 pc = jd->mcubuf;
WiredHome 115:c9862fd0c689 648 py = pc + iy * 8;
WiredHome 115:c9862fd0c689 649 if (my == 16) { /* Double block height? */
WiredHome 115:c9862fd0c689 650 pc += 64 * 4 + (iy >> 1) * 8;
WiredHome 115:c9862fd0c689 651 if (iy >= 8) py += 64;
WiredHome 115:c9862fd0c689 652 } else { /* Single block height */
WiredHome 115:c9862fd0c689 653 pc += mx * 8 + iy * 8;
WiredHome 115:c9862fd0c689 654 }
WiredHome 115:c9862fd0c689 655 for (ix = 0; ix < mx; ix++) {
WiredHome 115:c9862fd0c689 656 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 657 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 658 if (mx == 16) { /* Double block width? */
WiredHome 115:c9862fd0c689 659 if (ix == 8) py += 64 - 8; /* Jump to next block if double block heigt */
WiredHome 115:c9862fd0c689 660 pc += ix & 1; /* Increase chroma pointer every two pixels */
WiredHome 115:c9862fd0c689 661 } else { /* Single block width */
WiredHome 115:c9862fd0c689 662 pc++; /* Increase chroma pointer every pixel */
WiredHome 115:c9862fd0c689 663 }
WiredHome 115:c9862fd0c689 664 yy = *py++; /* Get Y component */
WiredHome 115:c9862fd0c689 665
WiredHome 115:c9862fd0c689 666 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 667 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 668 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 669 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb) / CVACC);
WiredHome 115:c9862fd0c689 670 }
WiredHome 115:c9862fd0c689 671 }
WiredHome 115:c9862fd0c689 672
WiredHome 115:c9862fd0c689 673 /* Descale the MCU rectangular if needed */
WiredHome 115:c9862fd0c689 674 if (JD_USE_SCALE && jd->scale) {
WiredHome 115:c9862fd0c689 675 uint16_t x, y, r, g, b, s, w, a;
WiredHome 115:c9862fd0c689 676 uint8_t *op;
WiredHome 115:c9862fd0c689 677
WiredHome 115:c9862fd0c689 678 /* Get averaged RGB value of each square correcponds to a pixel */
WiredHome 115:c9862fd0c689 679 s = jd->scale * 2; /* Bumber of shifts for averaging */
WiredHome 115:c9862fd0c689 680 w = 1 << jd->scale; /* Width of square */
WiredHome 115:c9862fd0c689 681 a = (mx - w) * 3; /* Bytes to skip for next line in the square */
WiredHome 115:c9862fd0c689 682 op = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 683 for (iy = 0; iy < my; iy += w) {
WiredHome 115:c9862fd0c689 684 for (ix = 0; ix < mx; ix += w) {
WiredHome 115:c9862fd0c689 685 rgb24 = (uint8_t *)jd->workbuf + (iy * mx + ix) * 3;
WiredHome 115:c9862fd0c689 686 r = g = b = 0;
WiredHome 115:c9862fd0c689 687 for (y = 0; y < w; y++) { /* Accumulate RGB value in the square */
WiredHome 115:c9862fd0c689 688 for (x = 0; x < w; x++) {
WiredHome 115:c9862fd0c689 689 r += *rgb24++;
WiredHome 115:c9862fd0c689 690 g += *rgb24++;
WiredHome 115:c9862fd0c689 691 b += *rgb24++;
WiredHome 115:c9862fd0c689 692 }
WiredHome 115:c9862fd0c689 693 rgb24 += a;
WiredHome 115:c9862fd0c689 694 } /* Put the averaged RGB value as a pixel */
WiredHome 115:c9862fd0c689 695 *op++ = (uint8_t)(r >> s);
WiredHome 115:c9862fd0c689 696 *op++ = (uint8_t)(g >> s);
WiredHome 115:c9862fd0c689 697 *op++ = (uint8_t)(b >> s);
WiredHome 115:c9862fd0c689 698 }
WiredHome 115:c9862fd0c689 699 }
WiredHome 115:c9862fd0c689 700 }
WiredHome 115:c9862fd0c689 701
WiredHome 115:c9862fd0c689 702 } else { /* For only 1/8 scaling (left-top pixel in each block are the DC value of the block) */
WiredHome 115:c9862fd0c689 703
WiredHome 115:c9862fd0c689 704 /* Build a 1/8 descaled RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 705 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 706 pc = jd->mcubuf + mx * my;
WiredHome 115:c9862fd0c689 707 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 708 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 709 for (iy = 0; iy < my; iy += 8) {
WiredHome 115:c9862fd0c689 710 py = jd->mcubuf;
WiredHome 115:c9862fd0c689 711 if (iy == 8) py += 64 * 2;
WiredHome 115:c9862fd0c689 712 for (ix = 0; ix < mx; ix += 8) {
WiredHome 115:c9862fd0c689 713 yy = *py; /* Get Y component */
WiredHome 115:c9862fd0c689 714 py += 64;
WiredHome 115:c9862fd0c689 715
WiredHome 115:c9862fd0c689 716 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 717 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr / CVACC));
WiredHome 115:c9862fd0c689 718 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 719 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb / CVACC));
WiredHome 115:c9862fd0c689 720 }
WiredHome 115:c9862fd0c689 721 }
WiredHome 115:c9862fd0c689 722 }
WiredHome 115:c9862fd0c689 723
WiredHome 115:c9862fd0c689 724 /* Squeeze up pixel table if a part of MCU is to be truncated */
WiredHome 115:c9862fd0c689 725 mx >>= jd->scale;
WiredHome 115:c9862fd0c689 726 if (rx < mx) {
WiredHome 115:c9862fd0c689 727 uint8_t *s, *d;
WiredHome 115:c9862fd0c689 728 uint16_t x, y;
WiredHome 115:c9862fd0c689 729
WiredHome 115:c9862fd0c689 730 s = d = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 731 for (y = 0; y < ry; y++) {
WiredHome 115:c9862fd0c689 732 for (x = 0; x < rx; x++) { /* Copy effective pixels */
WiredHome 115:c9862fd0c689 733 *d++ = *s++;
WiredHome 115:c9862fd0c689 734 *d++ = *s++;
WiredHome 115:c9862fd0c689 735 *d++ = *s++;
WiredHome 115:c9862fd0c689 736 }
WiredHome 115:c9862fd0c689 737 s += (mx - rx) * 3; /* Skip truncated pixels */
WiredHome 115:c9862fd0c689 738 }
WiredHome 115:c9862fd0c689 739 }
WiredHome 115:c9862fd0c689 740
WiredHome 115:c9862fd0c689 741 /* Convert RGB888 to RGB565 if needed */
WiredHome 115:c9862fd0c689 742 if (JD_FORMAT == 1) {
WiredHome 115:c9862fd0c689 743 uint8_t *s = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 744 uint16_t w, *d = (uint16_t *)s;
WiredHome 115:c9862fd0c689 745 uint16_t n = rx * ry;
WiredHome 115:c9862fd0c689 746
WiredHome 115:c9862fd0c689 747 do {
WiredHome 115:c9862fd0c689 748 w = (*s++ & 0xF8) << 8; /* RRRRR----------- */
WiredHome 115:c9862fd0c689 749 w |= (*s++ & 0xFC) << 3; /* -----GGGGGG----- */
WiredHome 115:c9862fd0c689 750 w |= *s++ >> 3; /* -----------BBBBB */
WiredHome 115:c9862fd0c689 751 *d++ = w;
WiredHome 115:c9862fd0c689 752 } while (--n);
WiredHome 115:c9862fd0c689 753 }
WiredHome 115:c9862fd0c689 754
WiredHome 115:c9862fd0c689 755 /* Output the RGB rectangular */
WiredHome 119:d129b798f82f 756 INFO("call outfunc");
WiredHome 115:c9862fd0c689 757 if (outfunc)
WiredHome 115:c9862fd0c689 758 return outfunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 759 else
WiredHome 115:c9862fd0c689 760 return privOutFunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 761 }
WiredHome 115:c9862fd0c689 762
WiredHome 115:c9862fd0c689 763
WiredHome 115:c9862fd0c689 764
WiredHome 115:c9862fd0c689 765
WiredHome 115:c9862fd0c689 766 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 767 /* Process restart interval */
WiredHome 115:c9862fd0c689 768 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 769
WiredHome 115:c9862fd0c689 770 JRESULT GraphicsDisplay::restart (
WiredHome 115:c9862fd0c689 771 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 772 uint16_t rstn /* Expected restert sequense number */
WiredHome 115:c9862fd0c689 773 )
WiredHome 115:c9862fd0c689 774 {
WiredHome 115:c9862fd0c689 775 uint16_t i, dc;
WiredHome 115:c9862fd0c689 776 uint16_t d;
WiredHome 115:c9862fd0c689 777 uint8_t *dp;
WiredHome 118:34eb0b64fc61 778
WiredHome 116:43e5bd2d7302 779 INFO("restart(%p,%d)", jd, rstn);
WiredHome 115:c9862fd0c689 780
WiredHome 115:c9862fd0c689 781 /* Discard padding bits and get two bytes from the input stream */
WiredHome 115:c9862fd0c689 782 dp = jd->dptr; dc = jd->dctr;
WiredHome 115:c9862fd0c689 783 d = 0;
WiredHome 115:c9862fd0c689 784 for (i = 0; i < 2; i++) {
WiredHome 115:c9862fd0c689 785 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 786 dp = jd->inbuf;
WiredHome 115:c9862fd0c689 787 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 788 if (!dc) return JDR_INP;
WiredHome 115:c9862fd0c689 789 } else {
WiredHome 115:c9862fd0c689 790 dp++;
WiredHome 115:c9862fd0c689 791 }
WiredHome 115:c9862fd0c689 792 dc--;
WiredHome 115:c9862fd0c689 793 d = (d << 8) | *dp; /* Get a byte */
WiredHome 115:c9862fd0c689 794 }
WiredHome 115:c9862fd0c689 795 jd->dptr = dp; jd->dctr = dc; jd->dmsk = 0;
WiredHome 115:c9862fd0c689 796
WiredHome 115:c9862fd0c689 797 /* Check the marker */
WiredHome 115:c9862fd0c689 798 if ((d & 0xFFD8) != 0xFFD0 || (d & 7) != (rstn & 7))
WiredHome 115:c9862fd0c689 799 return JDR_FMT1; /* Err: expected RSTn marker is not detected (may be collapted data) */
WiredHome 115:c9862fd0c689 800
WiredHome 115:c9862fd0c689 801 /* Reset DC offset */
WiredHome 115:c9862fd0c689 802 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0;
WiredHome 115:c9862fd0c689 803
WiredHome 115:c9862fd0c689 804 return JDR_OK;
WiredHome 115:c9862fd0c689 805 }
WiredHome 115:c9862fd0c689 806
WiredHome 115:c9862fd0c689 807
WiredHome 115:c9862fd0c689 808
WiredHome 115:c9862fd0c689 809
WiredHome 115:c9862fd0c689 810 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 811 /* Analyze the JPEG image and Initialize decompressor object */
WiredHome 115:c9862fd0c689 812 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 813
WiredHome 115:c9862fd0c689 814 #define LDB_WORD(ptr) (uint16_t)(((uint16_t)*((uint8_t *)(ptr))<<8)|(uint16_t)*(uint8_t *)((ptr)+1))
WiredHome 115:c9862fd0c689 815
WiredHome 115:c9862fd0c689 816 uint16_t GraphicsDisplay::privInFunc(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 817 {
WiredHome 115:c9862fd0c689 818 INFO("Read in %p count %d", buff, ndata);
WiredHome 115:c9862fd0c689 819 if (buff) {
WiredHome 115:c9862fd0c689 820 size_t n = fread(buff, 1, ndata, (FILE *)jd->device);
WiredHome 115:c9862fd0c689 821 INFO("fread returned %d of %d", n, ndata);
WiredHome 115:c9862fd0c689 822 HexDump("buf", buff, (ndata > 32) ? 32 : ndata);
WiredHome 115:c9862fd0c689 823 return n == (size_t)-1 ? 0 : n;
WiredHome 115:c9862fd0c689 824 } else {
WiredHome 115:c9862fd0c689 825 off_t t = fseek((FILE *)jd->device, ndata, SEEK_CUR);
WiredHome 115:c9862fd0c689 826 INFO("Seek returned %d", t);
WiredHome 115:c9862fd0c689 827 return t == (off_t)-1 ? 0 : ndata;
WiredHome 115:c9862fd0c689 828 }
WiredHome 115:c9862fd0c689 829 }
WiredHome 115:c9862fd0c689 830
WiredHome 115:c9862fd0c689 831 uint16_t GraphicsDisplay::getJpegData(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 832 {
WiredHome 115:c9862fd0c689 833 INFO("getJpegData(%p, %p, %d)", jd->infunc, buff, ndata);
WiredHome 115:c9862fd0c689 834 if (jd->infunc)
WiredHome 115:c9862fd0c689 835 return jd->infunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 836 else
WiredHome 115:c9862fd0c689 837 return privInFunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 838 }
WiredHome 115:c9862fd0c689 839
WiredHome 115:c9862fd0c689 840
WiredHome 115:c9862fd0c689 841 uint16_t GraphicsDisplay::privOutFunc(JDEC * jd, void * bitmap, JRECT * rect)
WiredHome 115:c9862fd0c689 842 {
WiredHome 115:c9862fd0c689 843 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 844 uint16_t *src = (uint16_t *)bitmap;
WiredHome 115:c9862fd0c689 845 #else
WiredHome 115:c9862fd0c689 846 uint8_t *src = (uint8_t *)bitmap;
WiredHome 115:c9862fd0c689 847 #endif
WiredHome 115:c9862fd0c689 848 int x0 = rect->left;
WiredHome 115:c9862fd0c689 849 int x1 = rect->right;
WiredHome 115:c9862fd0c689 850 int y0 = rect->top;
WiredHome 115:c9862fd0c689 851 int y1 = rect->bottom;
WiredHome 115:c9862fd0c689 852
WiredHome 115:c9862fd0c689 853 INFO("privOutFunc: (%d,%d)-(%d,%d) : (%d,%d)", x0,y0, x1,y1, width(), height());
WiredHome 115:c9862fd0c689 854 if (y0 >= height() || x0 >= width())
WiredHome 115:c9862fd0c689 855 return 1;
WiredHome 115:c9862fd0c689 856
WiredHome 115:c9862fd0c689 857 if (x1 > width()-1) x1 = width() - 1;
WiredHome 115:c9862fd0c689 858 if (y1 > height()-1) y1 = height() - 1;
WiredHome 115:c9862fd0c689 859
WiredHome 115:c9862fd0c689 860 INFO("checkpoint");
WiredHome 115:c9862fd0c689 861 int w = x1 - x0 + 1;
WiredHome 115:c9862fd0c689 862 for (int y= y0; y <= y1; y++) {
WiredHome 115:c9862fd0c689 863 SetGraphicsCursor(x0, y);
WiredHome 115:c9862fd0c689 864 _StartGraphicsStream();
WiredHome 115:c9862fd0c689 865 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 866 uint16_t *p = src + w * (y - y0);
WiredHome 115:c9862fd0c689 867 #else
WiredHome 115:c9862fd0c689 868 uint8_t *p = src + 3 * (w * (y - y0));
WiredHome 115:c9862fd0c689 869 #endif
WiredHome 115:c9862fd0c689 870 for (int x=x0; x <= x1; x++) {
WiredHome 115:c9862fd0c689 871 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 872 _putp(*p++);
WiredHome 115:c9862fd0c689 873 #else
WiredHome 115:c9862fd0c689 874 _putp(RGB(*p, *(p+1), *(p+2)));
WiredHome 115:c9862fd0c689 875 p += 3;
WiredHome 115:c9862fd0c689 876 #endif
WiredHome 115:c9862fd0c689 877 }
WiredHome 115:c9862fd0c689 878 _EndGraphicsStream();
WiredHome 115:c9862fd0c689 879 }
WiredHome 115:c9862fd0c689 880 return 1;
WiredHome 115:c9862fd0c689 881 }
WiredHome 115:c9862fd0c689 882
WiredHome 115:c9862fd0c689 883 JRESULT GraphicsDisplay::jd_prepare (
WiredHome 115:c9862fd0c689 884 JDEC * jd, /* Blank decompressor object */
WiredHome 115:c9862fd0c689 885 uint16_t (*infunc)(JDEC *, uint8_t *, uint16_t), /* JPEG strem input function */
WiredHome 115:c9862fd0c689 886 void* pool, /* Working buffer for the decompression session */
WiredHome 115:c9862fd0c689 887 uint16_t sz_pool, /* Size of working buffer */
WiredHome 115:c9862fd0c689 888 void* dev /* I/O device identifier for the session */
WiredHome 115:c9862fd0c689 889 )
WiredHome 115:c9862fd0c689 890 {
WiredHome 115:c9862fd0c689 891 uint8_t *seg, b;
WiredHome 115:c9862fd0c689 892 uint16_t marker;
WiredHome 115:c9862fd0c689 893 uint32_t ofs;
WiredHome 115:c9862fd0c689 894 uint16_t n, i, j, len;
WiredHome 115:c9862fd0c689 895 JRESULT rc;
WiredHome 115:c9862fd0c689 896
WiredHome 118:34eb0b64fc61 897 INFO("jd_prepare(%p,%p,%p,%d,%p)");
WiredHome 118:34eb0b64fc61 898 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 899
WiredHome 115:c9862fd0c689 900 if (!pool) {
WiredHome 115:c9862fd0c689 901 ERR("JDR_PAR");
WiredHome 115:c9862fd0c689 902 return JDR_PAR;
WiredHome 115:c9862fd0c689 903 }
WiredHome 115:c9862fd0c689 904
WiredHome 115:c9862fd0c689 905 INFO("pool is at %p", pool);
WiredHome 115:c9862fd0c689 906 jd->pool = pool; /* Work memroy */
WiredHome 115:c9862fd0c689 907 jd->sz_pool = sz_pool; /* Size of given work memory */
WiredHome 115:c9862fd0c689 908 jd->infunc = infunc; /* Stream input function */
WiredHome 115:c9862fd0c689 909 jd->device = dev; /* I/O device identifier */
WiredHome 115:c9862fd0c689 910 jd->nrst = 0; /* No restart interval (default) */
WiredHome 115:c9862fd0c689 911
WiredHome 115:c9862fd0c689 912 for (i = 0; i < 2; i++) { /* Nulls pointers */
WiredHome 115:c9862fd0c689 913 for (j = 0; j < 2; j++) {
WiredHome 115:c9862fd0c689 914 jd->huffbits[i][j] = 0;
WiredHome 115:c9862fd0c689 915 jd->huffcode[i][j] = 0;
WiredHome 115:c9862fd0c689 916 jd->huffdata[i][j] = 0;
WiredHome 115:c9862fd0c689 917 }
WiredHome 115:c9862fd0c689 918 }
WiredHome 115:c9862fd0c689 919 for (i = 0; i < 4; i++) jd->qttbl[i] = 0;
WiredHome 115:c9862fd0c689 920
WiredHome 115:c9862fd0c689 921 jd->inbuf = seg = (uint8_t *)alloc_pool(jd, JD_SZBUF); /* Allocate stream input buffer */
WiredHome 115:c9862fd0c689 922 if (!seg) {
WiredHome 115:c9862fd0c689 923 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 924 return JDR_MEM1;
WiredHome 115:c9862fd0c689 925 }
WiredHome 115:c9862fd0c689 926
WiredHome 115:c9862fd0c689 927 if (getJpegData(jd, seg, 2) != 2) {
WiredHome 115:c9862fd0c689 928 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 929 return JDR_INP;/* Check SOI marker */
WiredHome 115:c9862fd0c689 930 }
WiredHome 115:c9862fd0c689 931 INFO("SOI");
WiredHome 115:c9862fd0c689 932 HexDump("SOI marker", seg, 2);
WiredHome 115:c9862fd0c689 933 if (LDB_WORD(seg) != 0xFFD8) {
WiredHome 115:c9862fd0c689 934 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 935 return JDR_FMT1; /* Err: SOI is not detected */
WiredHome 115:c9862fd0c689 936 }
WiredHome 115:c9862fd0c689 937 ofs = 2;
WiredHome 115:c9862fd0c689 938
WiredHome 115:c9862fd0c689 939 for (;;) {
WiredHome 115:c9862fd0c689 940 /* Get a JPEG marker */
WiredHome 115:c9862fd0c689 941 if (getJpegData(jd, seg, 4) != 4) {
WiredHome 115:c9862fd0c689 942 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 943 return JDR_INP;
WiredHome 115:c9862fd0c689 944 }
WiredHome 115:c9862fd0c689 945 marker = LDB_WORD(seg); /* Marker */
WiredHome 115:c9862fd0c689 946 len = LDB_WORD(seg + 2); /* Length field */
WiredHome 115:c9862fd0c689 947 if (len <= 2 || (marker >> 8) != 0xFF) {
WiredHome 115:c9862fd0c689 948 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 949 return JDR_FMT1;
WiredHome 115:c9862fd0c689 950 }
WiredHome 115:c9862fd0c689 951 len -= 2; /* Content size excluding length field */
WiredHome 115:c9862fd0c689 952 ofs += 4 + len; /* Number of bytes loaded */
WiredHome 115:c9862fd0c689 953
WiredHome 115:c9862fd0c689 954 switch (marker & 0xFF) {
WiredHome 115:c9862fd0c689 955 case 0xC0: /* SOF0 (baseline JPEG) */
WiredHome 115:c9862fd0c689 956 /* Load segment data */
WiredHome 115:c9862fd0c689 957 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 958 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 959 return JDR_MEM2;
WiredHome 115:c9862fd0c689 960 }
WiredHome 115:c9862fd0c689 961 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 962 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 963 return JDR_INP;
WiredHome 115:c9862fd0c689 964 }
WiredHome 115:c9862fd0c689 965
WiredHome 115:c9862fd0c689 966 jd->width = LDB_WORD(seg+3); /* Image width in unit of pixel */
WiredHome 115:c9862fd0c689 967 jd->height = LDB_WORD(seg+1); /* Image height in unit of pixel */
WiredHome 115:c9862fd0c689 968 INFO("Image size(%d,%d)", jd->width, jd->height);
WiredHome 115:c9862fd0c689 969
WiredHome 115:c9862fd0c689 970 if (seg[5] != 3) {
WiredHome 115:c9862fd0c689 971 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 972 return JDR_FMT3; /* Err: Supports only Y/Cb/Cr format */
WiredHome 115:c9862fd0c689 973 }
WiredHome 115:c9862fd0c689 974
WiredHome 115:c9862fd0c689 975 /* Check three image components */
WiredHome 115:c9862fd0c689 976 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 977 b = seg[7 + 3 * i]; /* Get sampling factor */
WiredHome 115:c9862fd0c689 978 if (!i) { /* Y component */
WiredHome 115:c9862fd0c689 979 if (b != 0x11 && b != 0x22 && b != 0x21) {/* Check sampling factor */
WiredHome 115:c9862fd0c689 980 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 981 return JDR_FMT3; /* Err: Supports only 4:4:4, 4:2:0 or 4:2:2 */
WiredHome 115:c9862fd0c689 982 }
WiredHome 115:c9862fd0c689 983 jd->msx = b >> 4; jd->msy = b & 15; /* Size of MCU [blocks] */
WiredHome 115:c9862fd0c689 984 } else { /* Cb/Cr component */
WiredHome 115:c9862fd0c689 985 if (b != 0x11) {
WiredHome 115:c9862fd0c689 986 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 987 return JDR_FMT3; /* Err: Sampling factor of Cr/Cb must be 1 */
WiredHome 115:c9862fd0c689 988 }
WiredHome 115:c9862fd0c689 989 }
WiredHome 115:c9862fd0c689 990 b = seg[8 + 3 * i]; /* Get dequantizer table ID for this component */
WiredHome 115:c9862fd0c689 991 if (b > 3) {
WiredHome 115:c9862fd0c689 992 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 993 return JDR_FMT3; /* Err: Invalid ID */
WiredHome 115:c9862fd0c689 994 }
WiredHome 115:c9862fd0c689 995 jd->qtid[i] = b;
WiredHome 115:c9862fd0c689 996 }
WiredHome 115:c9862fd0c689 997 break;
WiredHome 115:c9862fd0c689 998
WiredHome 115:c9862fd0c689 999 case 0xDD: /* DRI */
WiredHome 115:c9862fd0c689 1000 /* Load segment data */
WiredHome 115:c9862fd0c689 1001 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1002 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1003 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1004 }
WiredHome 115:c9862fd0c689 1005 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1006 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1007 return JDR_INP;
WiredHome 115:c9862fd0c689 1008 }
WiredHome 115:c9862fd0c689 1009
WiredHome 115:c9862fd0c689 1010 /* Get restart interval (MCUs) */
WiredHome 115:c9862fd0c689 1011 jd->nrst = LDB_WORD(seg);
WiredHome 115:c9862fd0c689 1012 break;
WiredHome 115:c9862fd0c689 1013
WiredHome 115:c9862fd0c689 1014 case 0xC4: /* DHT */
WiredHome 115:c9862fd0c689 1015 /* Load segment data */
WiredHome 115:c9862fd0c689 1016 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1017 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1018 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1019 }
WiredHome 115:c9862fd0c689 1020 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1021 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1022 return JDR_INP;
WiredHome 115:c9862fd0c689 1023 }
WiredHome 115:c9862fd0c689 1024
WiredHome 115:c9862fd0c689 1025 /* Create huffman tables */
WiredHome 115:c9862fd0c689 1026 INFO("next - create_huffman_tbl()");
WiredHome 115:c9862fd0c689 1027 rc = (JRESULT)create_huffman_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1028 if (rc) {
WiredHome 115:c9862fd0c689 1029 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1030 return rc;
WiredHome 115:c9862fd0c689 1031 }
WiredHome 115:c9862fd0c689 1032 break;
WiredHome 115:c9862fd0c689 1033
WiredHome 115:c9862fd0c689 1034 case 0xDB: /* DQT */
WiredHome 115:c9862fd0c689 1035 /* Load segment data */
WiredHome 115:c9862fd0c689 1036 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1037 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1038 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1039 }
WiredHome 115:c9862fd0c689 1040 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1041 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1042 return JDR_INP;
WiredHome 115:c9862fd0c689 1043 }
WiredHome 115:c9862fd0c689 1044
WiredHome 115:c9862fd0c689 1045 /* Create de-quantizer tables */
WiredHome 115:c9862fd0c689 1046 rc = (JRESULT)create_qt_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1047 if (rc) {
WiredHome 115:c9862fd0c689 1048 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1049 return rc;
WiredHome 115:c9862fd0c689 1050 }
WiredHome 115:c9862fd0c689 1051 break;
WiredHome 115:c9862fd0c689 1052
WiredHome 115:c9862fd0c689 1053 case 0xDA: /* SOS */
WiredHome 115:c9862fd0c689 1054 /* Load segment data */
WiredHome 115:c9862fd0c689 1055 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1056 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1057 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1058 }
WiredHome 115:c9862fd0c689 1059 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1060 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1061 return JDR_INP;
WiredHome 115:c9862fd0c689 1062 }
WiredHome 115:c9862fd0c689 1063
WiredHome 115:c9862fd0c689 1064 if (!jd->width || !jd->height) {
WiredHome 115:c9862fd0c689 1065 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1066 return JDR_FMT1; /* Err: Invalid image size */
WiredHome 115:c9862fd0c689 1067 }
WiredHome 115:c9862fd0c689 1068
WiredHome 115:c9862fd0c689 1069 if (seg[0] != 3) {
WiredHome 115:c9862fd0c689 1070 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1071 return JDR_FMT3; /* Err: Supports only three color components format */
WiredHome 115:c9862fd0c689 1072 }
WiredHome 115:c9862fd0c689 1073
WiredHome 115:c9862fd0c689 1074 /* Check if all tables corresponding to each components have been loaded */
WiredHome 115:c9862fd0c689 1075 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 1076 b = seg[2 + 2 * i]; /* Get huffman table ID */
WiredHome 115:c9862fd0c689 1077 if (b != 0x00 && b != 0x11) {
WiredHome 115:c9862fd0c689 1078 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1079 return JDR_FMT3; /* Err: Different table number for DC/AC element */
WiredHome 115:c9862fd0c689 1080 }
WiredHome 115:c9862fd0c689 1081 b = i ? 1 : 0;
WiredHome 115:c9862fd0c689 1082 if (!jd->huffbits[b][0] || !jd->huffbits[b][1]) { /* Check huffman table for this component */
WiredHome 115:c9862fd0c689 1083 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1084 return JDR_FMT1; /* Err: Huffman table not loaded */
WiredHome 115:c9862fd0c689 1085 }
WiredHome 115:c9862fd0c689 1086 if (!jd->qttbl[jd->qtid[i]]) {
WiredHome 115:c9862fd0c689 1087 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1088 return JDR_FMT1; /* Err: Dequantizer table not loaded */
WiredHome 115:c9862fd0c689 1089 }
WiredHome 115:c9862fd0c689 1090 }
WiredHome 115:c9862fd0c689 1091
WiredHome 115:c9862fd0c689 1092 /* Allocate working buffer for MCU and RGB */
WiredHome 115:c9862fd0c689 1093 n = jd->msy * jd->msx; /* Number of Y blocks in the MCU */
WiredHome 115:c9862fd0c689 1094 if (!n) {
WiredHome 115:c9862fd0c689 1095 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1096 return JDR_FMT1; /* Err: SOF0 has not been loaded */
WiredHome 115:c9862fd0c689 1097 }
WiredHome 115:c9862fd0c689 1098 len = n * 64 * 2 + 64; /* Allocate buffer for IDCT and RGB output */
WiredHome 115:c9862fd0c689 1099 if (len < 256) len = 256; /* but at least 256 byte is required for IDCT */
WiredHome 115:c9862fd0c689 1100 jd->workbuf = alloc_pool(jd, len); /* and it may occupy a part of following MCU working buffer for RGB output */
WiredHome 115:c9862fd0c689 1101 if (!jd->workbuf) {
WiredHome 115:c9862fd0c689 1102 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1103 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1104 }
WiredHome 115:c9862fd0c689 1105 jd->mcubuf = (uint8_t *)alloc_pool(jd, (n + 2) * 64); /* Allocate MCU working buffer */
WiredHome 115:c9862fd0c689 1106 if (!jd->mcubuf) {
WiredHome 115:c9862fd0c689 1107 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1108 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1109 }
WiredHome 115:c9862fd0c689 1110
WiredHome 115:c9862fd0c689 1111 /* Pre-load the JPEG data to extract it from the bit stream */
WiredHome 115:c9862fd0c689 1112 jd->dptr = seg; jd->dctr = 0; jd->dmsk = 0; /* Prepare to read bit stream */
WiredHome 115:c9862fd0c689 1113 if (ofs %= JD_SZBUF) { /* Align read offset to JD_SZBUF */
WiredHome 115:c9862fd0c689 1114 jd->dctr = getJpegData(jd, seg + ofs, JD_SZBUF - (uint16_t)ofs);
WiredHome 115:c9862fd0c689 1115 jd->dptr = seg + ofs - 1;
WiredHome 115:c9862fd0c689 1116 }
WiredHome 115:c9862fd0c689 1117
WiredHome 115:c9862fd0c689 1118 return JDR_OK; /* Initialization succeeded. Ready to decompress the JPEG image. */
WiredHome 115:c9862fd0c689 1119
WiredHome 115:c9862fd0c689 1120 case 0xC1: /* SOF1 */
WiredHome 115:c9862fd0c689 1121 case 0xC2: /* SOF2 */
WiredHome 115:c9862fd0c689 1122 case 0xC3: /* SOF3 */
WiredHome 115:c9862fd0c689 1123 case 0xC5: /* SOF5 */
WiredHome 115:c9862fd0c689 1124 case 0xC6: /* SOF6 */
WiredHome 115:c9862fd0c689 1125 case 0xC7: /* SOF7 */
WiredHome 115:c9862fd0c689 1126 case 0xC9: /* SOF9 */
WiredHome 115:c9862fd0c689 1127 case 0xCA: /* SOF10 */
WiredHome 115:c9862fd0c689 1128 case 0xCB: /* SOF11 */
WiredHome 115:c9862fd0c689 1129 case 0xCD: /* SOF13 */
WiredHome 115:c9862fd0c689 1130 case 0xCE: /* SOF14 */
WiredHome 115:c9862fd0c689 1131 case 0xCF: /* SOF15 */
WiredHome 115:c9862fd0c689 1132 case 0xD9: /* EOI */
WiredHome 115:c9862fd0c689 1133 return JDR_FMT3; /* Unsuppoted JPEG standard (may be progressive JPEG) */
WiredHome 115:c9862fd0c689 1134
WiredHome 115:c9862fd0c689 1135 default: /* Unknown segment (comment, exif or etc..) */
WiredHome 115:c9862fd0c689 1136 /* Skip segment data */
WiredHome 115:c9862fd0c689 1137 if (getJpegData(jd, 0, len) != len) { /* Null pointer specifies to skip bytes of stream */
WiredHome 115:c9862fd0c689 1138 INFO("Unknown segment");
WiredHome 115:c9862fd0c689 1139 return JDR_INP;
WiredHome 115:c9862fd0c689 1140 }
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 /* Start to decompress the JPEG picture */
WiredHome 115:c9862fd0c689 1150 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 1151
WiredHome 115:c9862fd0c689 1152 JRESULT GraphicsDisplay::jd_decomp (
WiredHome 115:c9862fd0c689 1153 JDEC * jd, /* Initialized decompression object */
WiredHome 115:c9862fd0c689 1154 uint16_t (*outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 1155 uint8_t scale /* Output de-scaling factor (0 to 3) */
WiredHome 115:c9862fd0c689 1156 )
WiredHome 115:c9862fd0c689 1157 {
WiredHome 115:c9862fd0c689 1158 uint16_t x, y, mx, my;
WiredHome 115:c9862fd0c689 1159 uint16_t rst, rsc;
WiredHome 115:c9862fd0c689 1160 JRESULT rc;
WiredHome 115:c9862fd0c689 1161
WiredHome 118:34eb0b64fc61 1162 INFO("jd_decomp(%p,%p,%d)", jd, outfunc, scale);
WiredHome 118:34eb0b64fc61 1163 HexDump("JDEC", (uint8_t *)jd, sizeof(JDEC));
WiredHome 118:34eb0b64fc61 1164
WiredHome 115:c9862fd0c689 1165 if (scale > (JD_USE_SCALE ? 3 : 0)) return JDR_PAR;
WiredHome 115:c9862fd0c689 1166 jd->scale = scale;
WiredHome 115:c9862fd0c689 1167
WiredHome 115:c9862fd0c689 1168 mx = jd->msx * 8; my = jd->msy * 8; /* Size of the MCU (pixel) */
WiredHome 115:c9862fd0c689 1169
WiredHome 115:c9862fd0c689 1170 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0; /* Initialize DC values */
WiredHome 115:c9862fd0c689 1171 rst = rsc = 0;
WiredHome 115:c9862fd0c689 1172
WiredHome 115:c9862fd0c689 1173 rc = JDR_OK;
WiredHome 115:c9862fd0c689 1174 for (y = 0; y < jd->height; y += my) { /* Vertical loop of MCUs */
WiredHome 115:c9862fd0c689 1175 for (x = 0; x < jd->width; x += mx) { /* Horizontal loop of MCUs */
WiredHome 115:c9862fd0c689 1176 if (jd->nrst && rst++ == jd->nrst) { /* Process restart interval if enabled */
WiredHome 115:c9862fd0c689 1177 rc = restart(jd, rsc++);
WiredHome 115:c9862fd0c689 1178 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1179 rst = 1;
WiredHome 115:c9862fd0c689 1180 }
WiredHome 115:c9862fd0c689 1181 rc = mcu_load(jd); /* Load an MCU (decompress huffman coded stream and apply IDCT) */
WiredHome 115:c9862fd0c689 1182 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1183 rc = mcu_output(jd, outfunc, x, y); /* Output the MCU (color space conversion, scaling and output) */
WiredHome 115:c9862fd0c689 1184 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1185 }
WiredHome 115:c9862fd0c689 1186 }
WiredHome 115:c9862fd0c689 1187
WiredHome 115:c9862fd0c689 1188 return rc;
WiredHome 115:c9862fd0c689 1189 }