David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

GraphicsDisplayJPEG.cpp@117:6710b8e196f0, 2016-05-16 (annotated)

Committer:
WiredHome
Date:
Mon May 16 10:58:12 2016 +0000
Revision:
117:6710b8e196f0
Parent:
116:43e5bd2d7302
Child:
118:34eb0b64fc61
Add JDEC memory dump

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 115:c9862fd0c689 267 INFO("jd->pool: %p", jd->pool);
WiredHome 115:c9862fd0c689 268 jd->huffcode[num][cls] = ph;
WiredHome 115:c9862fd0c689 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 115:c9862fd0c689 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 115:c9862fd0c689 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 115:c9862fd0c689 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 115:c9862fd0c689 542
WiredHome 115:c9862fd0c689 543 nby = jd->msx * jd->msy; /* Number of Y blocks (1, 2 or 4) */
WiredHome 115:c9862fd0c689 544 nbc = 2; /* Number of C blocks (2) */
WiredHome 115:c9862fd0c689 545 bp = jd->mcubuf; /* Pointer to the first block */
WiredHome 115:c9862fd0c689 546
WiredHome 115:c9862fd0c689 547 for (blk = 0; blk < nby + nbc; blk++) {
WiredHome 115:c9862fd0c689 548 cmp = (blk < nby) ? 0 : blk - nby + 1; /* Component number 0:Y, 1:Cb, 2:Cr */
WiredHome 115:c9862fd0c689 549 id = cmp ? 1 : 0; /* Huffman table ID of the component */
WiredHome 115:c9862fd0c689 550
WiredHome 115:c9862fd0c689 551 /* Extract a DC element from input stream */
WiredHome 115:c9862fd0c689 552 hb = jd->huffbits[id][0]; /* Huffman table for the DC element */
WiredHome 115:c9862fd0c689 553 hc = jd->huffcode[id][0];
WiredHome 115:c9862fd0c689 554 hd = jd->huffdata[id][0];
WiredHome 115:c9862fd0c689 555 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded data (bit length) */
WiredHome 115:c9862fd0c689 556 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input */
WiredHome 115:c9862fd0c689 557 d = jd->dcv[cmp]; /* DC value of previous block */
WiredHome 115:c9862fd0c689 558 if (b) { /* If there is any difference from previous block */
WiredHome 115:c9862fd0c689 559 e = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 560 if (e < 0) return (JRESULT)(0 - e); /* Err: input */
WiredHome 115:c9862fd0c689 561 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 562 if (!(e & b)) e -= (b << 1) - 1; /* Restore sign if needed */
WiredHome 115:c9862fd0c689 563 d += e; /* Get current value */
WiredHome 115:c9862fd0c689 564 jd->dcv[cmp] = (int16_t)d; /* Save current DC value for next block */
WiredHome 115:c9862fd0c689 565 }
WiredHome 115:c9862fd0c689 566 dqf = jd->qttbl[jd->qtid[cmp]]; /* De-quantizer table ID for this component */
WiredHome 115:c9862fd0c689 567 tmp[0] = d * dqf[0] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 568
WiredHome 115:c9862fd0c689 569 /* Extract following 63 AC elements from input stream */
WiredHome 115:c9862fd0c689 570 for (i = 1; i < 64; i++) tmp[i] = 0; /* Clear rest of elements */
WiredHome 115:c9862fd0c689 571 hb = jd->huffbits[id][1]; /* Huffman table for the AC elements */
WiredHome 115:c9862fd0c689 572 hc = jd->huffcode[id][1];
WiredHome 115:c9862fd0c689 573 hd = jd->huffdata[id][1];
WiredHome 115:c9862fd0c689 574 i = 1; /* Top of the AC elements */
WiredHome 115:c9862fd0c689 575 do {
WiredHome 115:c9862fd0c689 576 b = huffext(jd, hb, hc, hd); /* Extract a huffman coded value (zero runs and bit length) */
WiredHome 115:c9862fd0c689 577 if (b == 0) break; /* EOB? */
WiredHome 115:c9862fd0c689 578 if (b < 0) return (JRESULT)(0 - b); /* Err: invalid code or input error */
WiredHome 115:c9862fd0c689 579 z = (uint16_t)b >> 4; /* Number of leading zero elements */
WiredHome 115:c9862fd0c689 580 if (z) {
WiredHome 115:c9862fd0c689 581 i += z; /* Skip zero elements */
WiredHome 115:c9862fd0c689 582 if (i >= 64) return JDR_FMT1; /* Too long zero run */
WiredHome 115:c9862fd0c689 583 }
WiredHome 115:c9862fd0c689 584 if (b &= 0x0F) { /* Bit length */
WiredHome 115:c9862fd0c689 585 d = bitext(jd, b); /* Extract data bits */
WiredHome 115:c9862fd0c689 586 if (d < 0) return (JRESULT)(0 - d); /* Err: input device */
WiredHome 115:c9862fd0c689 587 b = 1 << (b - 1); /* MSB position */
WiredHome 115:c9862fd0c689 588 if (!(d & b)) d -= (b << 1) - 1;/* Restore negative value if needed */
WiredHome 115:c9862fd0c689 589 z = ZIG(i); /* Zigzag-order to raster-order converted index */
WiredHome 115:c9862fd0c689 590 tmp[z] = d * dqf[z] >> 8; /* De-quantize, apply scale factor of Arai algorithm and descale 8 bits */
WiredHome 115:c9862fd0c689 591 }
WiredHome 115:c9862fd0c689 592 } while (++i < 64); /* Next AC element */
WiredHome 115:c9862fd0c689 593
WiredHome 115:c9862fd0c689 594 if (JD_USE_SCALE && jd->scale == 3)
WiredHome 115:c9862fd0c689 595 *bp = (*tmp / 256) + 128; /* If scale ratio is 1/8, IDCT can be ommited and only DC element is used */
WiredHome 115:c9862fd0c689 596 else
WiredHome 115:c9862fd0c689 597 block_idct(tmp, bp); /* Apply IDCT and store the block to the MCU buffer */
WiredHome 115:c9862fd0c689 598
WiredHome 115:c9862fd0c689 599 bp += 64; /* Next block */
WiredHome 115:c9862fd0c689 600 }
WiredHome 115:c9862fd0c689 601
WiredHome 115:c9862fd0c689 602 return JDR_OK; /* All blocks have been loaded successfully */
WiredHome 115:c9862fd0c689 603 }
WiredHome 115:c9862fd0c689 604
WiredHome 115:c9862fd0c689 605
WiredHome 115:c9862fd0c689 606
WiredHome 115:c9862fd0c689 607
WiredHome 115:c9862fd0c689 608 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 609 /* Output an MCU: Convert YCrCb to RGB and output it in RGB form */
WiredHome 115:c9862fd0c689 610 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 611
WiredHome 115:c9862fd0c689 612 JRESULT GraphicsDisplay::mcu_output (
WiredHome 115:c9862fd0c689 613 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 614 uint16_t (* outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 615 uint16_t x, /* MCU position in the image (left of the MCU) */
WiredHome 115:c9862fd0c689 616 uint16_t y /* MCU position in the image (top of the MCU) */
WiredHome 115:c9862fd0c689 617 )
WiredHome 115:c9862fd0c689 618 {
WiredHome 115:c9862fd0c689 619 const int16_t CVACC = (sizeof (int16_t) > 2) ? 1024 : 128;
WiredHome 115:c9862fd0c689 620 uint16_t ix, iy, mx, my, rx, ry;
WiredHome 115:c9862fd0c689 621 int16_t yy, cb, cr;
WiredHome 115:c9862fd0c689 622 uint8_t *py, *pc, *rgb24;
WiredHome 115:c9862fd0c689 623 JRECT rect;
WiredHome 115:c9862fd0c689 624
WiredHome 115:c9862fd0c689 625 mx = jd->msx * 8; my = jd->msy * 8; /* MCU size (pixel) */
WiredHome 115:c9862fd0c689 626 rx = (x + mx <= jd->width) ? mx : jd->width - x; /* Output rectangular size (it may be clipped at right/bottom end) */
WiredHome 115:c9862fd0c689 627 ry = (y + my <= jd->height) ? my : jd->height - y;
WiredHome 115:c9862fd0c689 628 if (JD_USE_SCALE) {
WiredHome 115:c9862fd0c689 629 rx >>= jd->scale; ry >>= jd->scale;
WiredHome 115:c9862fd0c689 630 if (!rx || !ry) return JDR_OK; /* Skip this MCU if all pixel is to be rounded off */
WiredHome 115:c9862fd0c689 631 x >>= jd->scale; y >>= jd->scale;
WiredHome 115:c9862fd0c689 632 }
WiredHome 115:c9862fd0c689 633 rect.left = x; rect.right = x + rx - 1; /* Rectangular area in the frame buffer */
WiredHome 115:c9862fd0c689 634 rect.top = y; rect.bottom = y + ry - 1;
WiredHome 115:c9862fd0c689 635
WiredHome 115:c9862fd0c689 636
WiredHome 115:c9862fd0c689 637 if (!JD_USE_SCALE || jd->scale != 3) { /* Not for 1/8 scaling */
WiredHome 115:c9862fd0c689 638
WiredHome 115:c9862fd0c689 639 /* Build an RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 640 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 641 for (iy = 0; iy < my; iy++) {
WiredHome 115:c9862fd0c689 642 pc = jd->mcubuf;
WiredHome 115:c9862fd0c689 643 py = pc + iy * 8;
WiredHome 115:c9862fd0c689 644 if (my == 16) { /* Double block height? */
WiredHome 115:c9862fd0c689 645 pc += 64 * 4 + (iy >> 1) * 8;
WiredHome 115:c9862fd0c689 646 if (iy >= 8) py += 64;
WiredHome 115:c9862fd0c689 647 } else { /* Single block height */
WiredHome 115:c9862fd0c689 648 pc += mx * 8 + iy * 8;
WiredHome 115:c9862fd0c689 649 }
WiredHome 115:c9862fd0c689 650 for (ix = 0; ix < mx; ix++) {
WiredHome 115:c9862fd0c689 651 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 652 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 653 if (mx == 16) { /* Double block width? */
WiredHome 115:c9862fd0c689 654 if (ix == 8) py += 64 - 8; /* Jump to next block if double block heigt */
WiredHome 115:c9862fd0c689 655 pc += ix & 1; /* Increase chroma pointer every two pixels */
WiredHome 115:c9862fd0c689 656 } else { /* Single block width */
WiredHome 115:c9862fd0c689 657 pc++; /* Increase chroma pointer every pixel */
WiredHome 115:c9862fd0c689 658 }
WiredHome 115:c9862fd0c689 659 yy = *py++; /* Get Y component */
WiredHome 115:c9862fd0c689 660
WiredHome 115:c9862fd0c689 661 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 662 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 663 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 664 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb) / CVACC);
WiredHome 115:c9862fd0c689 665 }
WiredHome 115:c9862fd0c689 666 }
WiredHome 115:c9862fd0c689 667
WiredHome 115:c9862fd0c689 668 /* Descale the MCU rectangular if needed */
WiredHome 115:c9862fd0c689 669 if (JD_USE_SCALE && jd->scale) {
WiredHome 115:c9862fd0c689 670 uint16_t x, y, r, g, b, s, w, a;
WiredHome 115:c9862fd0c689 671 uint8_t *op;
WiredHome 115:c9862fd0c689 672
WiredHome 115:c9862fd0c689 673 /* Get averaged RGB value of each square correcponds to a pixel */
WiredHome 115:c9862fd0c689 674 s = jd->scale * 2; /* Bumber of shifts for averaging */
WiredHome 115:c9862fd0c689 675 w = 1 << jd->scale; /* Width of square */
WiredHome 115:c9862fd0c689 676 a = (mx - w) * 3; /* Bytes to skip for next line in the square */
WiredHome 115:c9862fd0c689 677 op = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 678 for (iy = 0; iy < my; iy += w) {
WiredHome 115:c9862fd0c689 679 for (ix = 0; ix < mx; ix += w) {
WiredHome 115:c9862fd0c689 680 rgb24 = (uint8_t *)jd->workbuf + (iy * mx + ix) * 3;
WiredHome 115:c9862fd0c689 681 r = g = b = 0;
WiredHome 115:c9862fd0c689 682 for (y = 0; y < w; y++) { /* Accumulate RGB value in the square */
WiredHome 115:c9862fd0c689 683 for (x = 0; x < w; x++) {
WiredHome 115:c9862fd0c689 684 r += *rgb24++;
WiredHome 115:c9862fd0c689 685 g += *rgb24++;
WiredHome 115:c9862fd0c689 686 b += *rgb24++;
WiredHome 115:c9862fd0c689 687 }
WiredHome 115:c9862fd0c689 688 rgb24 += a;
WiredHome 115:c9862fd0c689 689 } /* Put the averaged RGB value as a pixel */
WiredHome 115:c9862fd0c689 690 *op++ = (uint8_t)(r >> s);
WiredHome 115:c9862fd0c689 691 *op++ = (uint8_t)(g >> s);
WiredHome 115:c9862fd0c689 692 *op++ = (uint8_t)(b >> s);
WiredHome 115:c9862fd0c689 693 }
WiredHome 115:c9862fd0c689 694 }
WiredHome 115:c9862fd0c689 695 }
WiredHome 115:c9862fd0c689 696
WiredHome 115:c9862fd0c689 697 } else { /* For only 1/8 scaling (left-top pixel in each block are the DC value of the block) */
WiredHome 115:c9862fd0c689 698
WiredHome 115:c9862fd0c689 699 /* Build a 1/8 descaled RGB MCU from discrete comopnents */
WiredHome 115:c9862fd0c689 700 rgb24 = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 701 pc = jd->mcubuf + mx * my;
WiredHome 115:c9862fd0c689 702 cb = pc[0] - 128; /* Get Cb/Cr component and restore right level */
WiredHome 115:c9862fd0c689 703 cr = pc[64] - 128;
WiredHome 115:c9862fd0c689 704 for (iy = 0; iy < my; iy += 8) {
WiredHome 115:c9862fd0c689 705 py = jd->mcubuf;
WiredHome 115:c9862fd0c689 706 if (iy == 8) py += 64 * 2;
WiredHome 115:c9862fd0c689 707 for (ix = 0; ix < mx; ix += 8) {
WiredHome 115:c9862fd0c689 708 yy = *py; /* Get Y component */
WiredHome 115:c9862fd0c689 709 py += 64;
WiredHome 115:c9862fd0c689 710
WiredHome 115:c9862fd0c689 711 /* Convert YCbCr to RGB */
WiredHome 115:c9862fd0c689 712 *rgb24++ = /* R */ BYTECLIP(yy + ((int16_t)(1.402 * CVACC) * cr / CVACC));
WiredHome 115:c9862fd0c689 713 *rgb24++ = /* G */ BYTECLIP(yy - ((int16_t)(0.344 * CVACC) * cb + (int16_t)(0.714 * CVACC) * cr) / CVACC);
WiredHome 115:c9862fd0c689 714 *rgb24++ = /* B */ BYTECLIP(yy + ((int16_t)(1.772 * CVACC) * cb / CVACC));
WiredHome 115:c9862fd0c689 715 }
WiredHome 115:c9862fd0c689 716 }
WiredHome 115:c9862fd0c689 717 }
WiredHome 115:c9862fd0c689 718
WiredHome 115:c9862fd0c689 719 /* Squeeze up pixel table if a part of MCU is to be truncated */
WiredHome 115:c9862fd0c689 720 mx >>= jd->scale;
WiredHome 115:c9862fd0c689 721 if (rx < mx) {
WiredHome 115:c9862fd0c689 722 uint8_t *s, *d;
WiredHome 115:c9862fd0c689 723 uint16_t x, y;
WiredHome 115:c9862fd0c689 724
WiredHome 115:c9862fd0c689 725 s = d = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 726 for (y = 0; y < ry; y++) {
WiredHome 115:c9862fd0c689 727 for (x = 0; x < rx; x++) { /* Copy effective pixels */
WiredHome 115:c9862fd0c689 728 *d++ = *s++;
WiredHome 115:c9862fd0c689 729 *d++ = *s++;
WiredHome 115:c9862fd0c689 730 *d++ = *s++;
WiredHome 115:c9862fd0c689 731 }
WiredHome 115:c9862fd0c689 732 s += (mx - rx) * 3; /* Skip truncated pixels */
WiredHome 115:c9862fd0c689 733 }
WiredHome 115:c9862fd0c689 734 }
WiredHome 115:c9862fd0c689 735
WiredHome 115:c9862fd0c689 736 /* Convert RGB888 to RGB565 if needed */
WiredHome 115:c9862fd0c689 737 if (JD_FORMAT == 1) {
WiredHome 115:c9862fd0c689 738 uint8_t *s = (uint8_t *)jd->workbuf;
WiredHome 115:c9862fd0c689 739 uint16_t w, *d = (uint16_t *)s;
WiredHome 115:c9862fd0c689 740 uint16_t n = rx * ry;
WiredHome 115:c9862fd0c689 741
WiredHome 115:c9862fd0c689 742 do {
WiredHome 115:c9862fd0c689 743 w = (*s++ & 0xF8) << 8; /* RRRRR----------- */
WiredHome 115:c9862fd0c689 744 w |= (*s++ & 0xFC) << 3; /* -----GGGGGG----- */
WiredHome 115:c9862fd0c689 745 w |= *s++ >> 3; /* -----------BBBBB */
WiredHome 115:c9862fd0c689 746 *d++ = w;
WiredHome 115:c9862fd0c689 747 } while (--n);
WiredHome 115:c9862fd0c689 748 }
WiredHome 115:c9862fd0c689 749
WiredHome 115:c9862fd0c689 750 /* Output the RGB rectangular */
WiredHome 115:c9862fd0c689 751 INFO("mcu_output");
WiredHome 115:c9862fd0c689 752 if (outfunc)
WiredHome 115:c9862fd0c689 753 return outfunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 754 else
WiredHome 115:c9862fd0c689 755 return privOutFunc(jd, jd->workbuf, &rect) ? JDR_OK : JDR_INTR;
WiredHome 115:c9862fd0c689 756 }
WiredHome 115:c9862fd0c689 757
WiredHome 115:c9862fd0c689 758
WiredHome 115:c9862fd0c689 759
WiredHome 115:c9862fd0c689 760
WiredHome 115:c9862fd0c689 761 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 762 /* Process restart interval */
WiredHome 115:c9862fd0c689 763 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 764
WiredHome 115:c9862fd0c689 765 JRESULT GraphicsDisplay::restart (
WiredHome 115:c9862fd0c689 766 JDEC * jd, /* Pointer to the decompressor object */
WiredHome 115:c9862fd0c689 767 uint16_t rstn /* Expected restert sequense number */
WiredHome 115:c9862fd0c689 768 )
WiredHome 115:c9862fd0c689 769 {
WiredHome 115:c9862fd0c689 770 uint16_t i, dc;
WiredHome 115:c9862fd0c689 771 uint16_t d;
WiredHome 115:c9862fd0c689 772 uint8_t *dp;
WiredHome 116:43e5bd2d7302 773 INFO("restart(%p,%d)", jd, rstn);
WiredHome 115:c9862fd0c689 774
WiredHome 115:c9862fd0c689 775 /* Discard padding bits and get two bytes from the input stream */
WiredHome 115:c9862fd0c689 776 dp = jd->dptr; dc = jd->dctr;
WiredHome 115:c9862fd0c689 777 d = 0;
WiredHome 115:c9862fd0c689 778 for (i = 0; i < 2; i++) {
WiredHome 115:c9862fd0c689 779 if (!dc) { /* No input data is available, re-fill input buffer */
WiredHome 115:c9862fd0c689 780 dp = jd->inbuf;
WiredHome 115:c9862fd0c689 781 dc = getJpegData(jd, dp, JD_SZBUF);
WiredHome 115:c9862fd0c689 782 if (!dc) return JDR_INP;
WiredHome 115:c9862fd0c689 783 } else {
WiredHome 115:c9862fd0c689 784 dp++;
WiredHome 115:c9862fd0c689 785 }
WiredHome 115:c9862fd0c689 786 dc--;
WiredHome 115:c9862fd0c689 787 d = (d << 8) | *dp; /* Get a byte */
WiredHome 115:c9862fd0c689 788 }
WiredHome 115:c9862fd0c689 789 jd->dptr = dp; jd->dctr = dc; jd->dmsk = 0;
WiredHome 115:c9862fd0c689 790
WiredHome 115:c9862fd0c689 791 /* Check the marker */
WiredHome 115:c9862fd0c689 792 if ((d & 0xFFD8) != 0xFFD0 || (d & 7) != (rstn & 7))
WiredHome 115:c9862fd0c689 793 return JDR_FMT1; /* Err: expected RSTn marker is not detected (may be collapted data) */
WiredHome 115:c9862fd0c689 794
WiredHome 115:c9862fd0c689 795 /* Reset DC offset */
WiredHome 115:c9862fd0c689 796 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0;
WiredHome 115:c9862fd0c689 797
WiredHome 115:c9862fd0c689 798 return JDR_OK;
WiredHome 115:c9862fd0c689 799 }
WiredHome 115:c9862fd0c689 800
WiredHome 115:c9862fd0c689 801
WiredHome 115:c9862fd0c689 802
WiredHome 115:c9862fd0c689 803
WiredHome 115:c9862fd0c689 804 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 805 /* Analyze the JPEG image and Initialize decompressor object */
WiredHome 115:c9862fd0c689 806 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 807
WiredHome 115:c9862fd0c689 808 #define LDB_WORD(ptr) (uint16_t)(((uint16_t)*((uint8_t *)(ptr))<<8)|(uint16_t)*(uint8_t *)((ptr)+1))
WiredHome 115:c9862fd0c689 809
WiredHome 115:c9862fd0c689 810 uint16_t GraphicsDisplay::privInFunc(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 811 {
WiredHome 115:c9862fd0c689 812 INFO("Read in %p count %d", buff, ndata);
WiredHome 115:c9862fd0c689 813 if (buff) {
WiredHome 115:c9862fd0c689 814 size_t n = fread(buff, 1, ndata, (FILE *)jd->device);
WiredHome 115:c9862fd0c689 815 INFO("fread returned %d of %d", n, ndata);
WiredHome 115:c9862fd0c689 816 HexDump("buf", buff, (ndata > 32) ? 32 : ndata);
WiredHome 115:c9862fd0c689 817 return n == (size_t)-1 ? 0 : n;
WiredHome 115:c9862fd0c689 818 } else {
WiredHome 115:c9862fd0c689 819 off_t t = fseek((FILE *)jd->device, ndata, SEEK_CUR);
WiredHome 115:c9862fd0c689 820 INFO("Seek returned %d", t);
WiredHome 115:c9862fd0c689 821 return t == (off_t)-1 ? 0 : ndata;
WiredHome 115:c9862fd0c689 822 }
WiredHome 115:c9862fd0c689 823 }
WiredHome 115:c9862fd0c689 824
WiredHome 115:c9862fd0c689 825 uint16_t GraphicsDisplay::getJpegData(JDEC * jd, uint8_t * buff, uint16_t ndata)
WiredHome 115:c9862fd0c689 826 {
WiredHome 115:c9862fd0c689 827 INFO("getJpegData(%p, %p, %d)", jd->infunc, buff, ndata);
WiredHome 115:c9862fd0c689 828 if (jd->infunc)
WiredHome 115:c9862fd0c689 829 return jd->infunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 830 else
WiredHome 115:c9862fd0c689 831 return privInFunc(jd, buff, ndata);
WiredHome 115:c9862fd0c689 832 }
WiredHome 115:c9862fd0c689 833
WiredHome 115:c9862fd0c689 834
WiredHome 115:c9862fd0c689 835 uint16_t GraphicsDisplay::privOutFunc(JDEC * jd, void * bitmap, JRECT * rect)
WiredHome 115:c9862fd0c689 836 {
WiredHome 115:c9862fd0c689 837 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 838 uint16_t *src = (uint16_t *)bitmap;
WiredHome 115:c9862fd0c689 839 #else
WiredHome 115:c9862fd0c689 840 uint8_t *src = (uint8_t *)bitmap;
WiredHome 115:c9862fd0c689 841 #endif
WiredHome 115:c9862fd0c689 842 int x0 = rect->left;
WiredHome 115:c9862fd0c689 843 int x1 = rect->right;
WiredHome 115:c9862fd0c689 844 int y0 = rect->top;
WiredHome 115:c9862fd0c689 845 int y1 = rect->bottom;
WiredHome 115:c9862fd0c689 846
WiredHome 115:c9862fd0c689 847 INFO("privOutFunc: (%d,%d)-(%d,%d) : (%d,%d)", x0,y0, x1,y1, width(), height());
WiredHome 115:c9862fd0c689 848 if (y0 >= height() || x0 >= width())
WiredHome 115:c9862fd0c689 849 return 1;
WiredHome 115:c9862fd0c689 850
WiredHome 115:c9862fd0c689 851 if (x1 > width()-1) x1 = width() - 1;
WiredHome 115:c9862fd0c689 852 if (y1 > height()-1) y1 = height() - 1;
WiredHome 115:c9862fd0c689 853
WiredHome 115:c9862fd0c689 854 INFO("checkpoint");
WiredHome 115:c9862fd0c689 855 int w = x1 - x0 + 1;
WiredHome 115:c9862fd0c689 856 for (int y= y0; y <= y1; y++) {
WiredHome 115:c9862fd0c689 857 SetGraphicsCursor(x0, y);
WiredHome 115:c9862fd0c689 858 _StartGraphicsStream();
WiredHome 115:c9862fd0c689 859 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 860 uint16_t *p = src + w * (y - y0);
WiredHome 115:c9862fd0c689 861 #else
WiredHome 115:c9862fd0c689 862 uint8_t *p = src + 3 * (w * (y - y0));
WiredHome 115:c9862fd0c689 863 #endif
WiredHome 115:c9862fd0c689 864 for (int x=x0; x <= x1; x++) {
WiredHome 115:c9862fd0c689 865 #if JD_FORMAT == 1
WiredHome 115:c9862fd0c689 866 _putp(*p++);
WiredHome 115:c9862fd0c689 867 #else
WiredHome 115:c9862fd0c689 868 _putp(RGB(*p, *(p+1), *(p+2)));
WiredHome 115:c9862fd0c689 869 p += 3;
WiredHome 115:c9862fd0c689 870 #endif
WiredHome 115:c9862fd0c689 871 }
WiredHome 115:c9862fd0c689 872 _EndGraphicsStream();
WiredHome 115:c9862fd0c689 873 }
WiredHome 115:c9862fd0c689 874 return 1;
WiredHome 115:c9862fd0c689 875 }
WiredHome 115:c9862fd0c689 876
WiredHome 115:c9862fd0c689 877 JRESULT GraphicsDisplay::jd_prepare (
WiredHome 115:c9862fd0c689 878 JDEC * jd, /* Blank decompressor object */
WiredHome 115:c9862fd0c689 879 uint16_t (*infunc)(JDEC *, uint8_t *, uint16_t), /* JPEG strem input function */
WiredHome 115:c9862fd0c689 880 void* pool, /* Working buffer for the decompression session */
WiredHome 115:c9862fd0c689 881 uint16_t sz_pool, /* Size of working buffer */
WiredHome 115:c9862fd0c689 882 void* dev /* I/O device identifier for the session */
WiredHome 115:c9862fd0c689 883 )
WiredHome 115:c9862fd0c689 884 {
WiredHome 115:c9862fd0c689 885 uint8_t *seg, b;
WiredHome 115:c9862fd0c689 886 uint16_t marker;
WiredHome 115:c9862fd0c689 887 uint32_t ofs;
WiredHome 115:c9862fd0c689 888 uint16_t n, i, j, len;
WiredHome 115:c9862fd0c689 889 JRESULT rc;
WiredHome 115:c9862fd0c689 890
WiredHome 115:c9862fd0c689 891 INFO("jd_prepare()");
WiredHome 115:c9862fd0c689 892 if (!pool) {
WiredHome 115:c9862fd0c689 893 ERR("JDR_PAR");
WiredHome 115:c9862fd0c689 894 return JDR_PAR;
WiredHome 115:c9862fd0c689 895 }
WiredHome 115:c9862fd0c689 896
WiredHome 115:c9862fd0c689 897 INFO("pool is at %p", pool);
WiredHome 115:c9862fd0c689 898 jd->pool = pool; /* Work memroy */
WiredHome 115:c9862fd0c689 899 jd->sz_pool = sz_pool; /* Size of given work memory */
WiredHome 115:c9862fd0c689 900 jd->infunc = infunc; /* Stream input function */
WiredHome 115:c9862fd0c689 901 jd->device = dev; /* I/O device identifier */
WiredHome 115:c9862fd0c689 902 jd->nrst = 0; /* No restart interval (default) */
WiredHome 115:c9862fd0c689 903
WiredHome 115:c9862fd0c689 904 for (i = 0; i < 2; i++) { /* Nulls pointers */
WiredHome 115:c9862fd0c689 905 for (j = 0; j < 2; j++) {
WiredHome 115:c9862fd0c689 906 jd->huffbits[i][j] = 0;
WiredHome 115:c9862fd0c689 907 jd->huffcode[i][j] = 0;
WiredHome 115:c9862fd0c689 908 jd->huffdata[i][j] = 0;
WiredHome 115:c9862fd0c689 909 }
WiredHome 115:c9862fd0c689 910 }
WiredHome 115:c9862fd0c689 911 for (i = 0; i < 4; i++) jd->qttbl[i] = 0;
WiredHome 115:c9862fd0c689 912
WiredHome 115:c9862fd0c689 913 jd->inbuf = seg = (uint8_t *)alloc_pool(jd, JD_SZBUF); /* Allocate stream input buffer */
WiredHome 115:c9862fd0c689 914 if (!seg) {
WiredHome 115:c9862fd0c689 915 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 916 return JDR_MEM1;
WiredHome 115:c9862fd0c689 917 }
WiredHome 115:c9862fd0c689 918
WiredHome 115:c9862fd0c689 919 if (getJpegData(jd, seg, 2) != 2) {
WiredHome 115:c9862fd0c689 920 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 921 return JDR_INP;/* Check SOI marker */
WiredHome 115:c9862fd0c689 922 }
WiredHome 115:c9862fd0c689 923 INFO("SOI");
WiredHome 115:c9862fd0c689 924 HexDump("SOI marker", seg, 2);
WiredHome 115:c9862fd0c689 925 if (LDB_WORD(seg) != 0xFFD8) {
WiredHome 115:c9862fd0c689 926 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 927 return JDR_FMT1; /* Err: SOI is not detected */
WiredHome 115:c9862fd0c689 928 }
WiredHome 115:c9862fd0c689 929 ofs = 2;
WiredHome 115:c9862fd0c689 930
WiredHome 115:c9862fd0c689 931 for (;;) {
WiredHome 115:c9862fd0c689 932 /* Get a JPEG marker */
WiredHome 115:c9862fd0c689 933 if (getJpegData(jd, seg, 4) != 4) {
WiredHome 115:c9862fd0c689 934 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 935 return JDR_INP;
WiredHome 115:c9862fd0c689 936 }
WiredHome 115:c9862fd0c689 937 marker = LDB_WORD(seg); /* Marker */
WiredHome 115:c9862fd0c689 938 len = LDB_WORD(seg + 2); /* Length field */
WiredHome 115:c9862fd0c689 939 if (len <= 2 || (marker >> 8) != 0xFF) {
WiredHome 115:c9862fd0c689 940 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 941 return JDR_FMT1;
WiredHome 115:c9862fd0c689 942 }
WiredHome 115:c9862fd0c689 943 len -= 2; /* Content size excluding length field */
WiredHome 115:c9862fd0c689 944 ofs += 4 + len; /* Number of bytes loaded */
WiredHome 115:c9862fd0c689 945
WiredHome 115:c9862fd0c689 946 switch (marker & 0xFF) {
WiredHome 115:c9862fd0c689 947 case 0xC0: /* SOF0 (baseline JPEG) */
WiredHome 115:c9862fd0c689 948 /* Load segment data */
WiredHome 115:c9862fd0c689 949 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 950 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 951 return JDR_MEM2;
WiredHome 115:c9862fd0c689 952 }
WiredHome 115:c9862fd0c689 953 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 954 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 955 return JDR_INP;
WiredHome 115:c9862fd0c689 956 }
WiredHome 115:c9862fd0c689 957
WiredHome 115:c9862fd0c689 958 jd->width = LDB_WORD(seg+3); /* Image width in unit of pixel */
WiredHome 115:c9862fd0c689 959 jd->height = LDB_WORD(seg+1); /* Image height in unit of pixel */
WiredHome 115:c9862fd0c689 960 INFO("Image size(%d,%d)", jd->width, jd->height);
WiredHome 115:c9862fd0c689 961
WiredHome 115:c9862fd0c689 962 if (seg[5] != 3) {
WiredHome 115:c9862fd0c689 963 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 964 return JDR_FMT3; /* Err: Supports only Y/Cb/Cr format */
WiredHome 115:c9862fd0c689 965 }
WiredHome 115:c9862fd0c689 966
WiredHome 115:c9862fd0c689 967 /* Check three image components */
WiredHome 115:c9862fd0c689 968 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 969 b = seg[7 + 3 * i]; /* Get sampling factor */
WiredHome 115:c9862fd0c689 970 if (!i) { /* Y component */
WiredHome 115:c9862fd0c689 971 if (b != 0x11 && b != 0x22 && b != 0x21) {/* Check sampling factor */
WiredHome 115:c9862fd0c689 972 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 973 return JDR_FMT3; /* Err: Supports only 4:4:4, 4:2:0 or 4:2:2 */
WiredHome 115:c9862fd0c689 974 }
WiredHome 115:c9862fd0c689 975 jd->msx = b >> 4; jd->msy = b & 15; /* Size of MCU [blocks] */
WiredHome 115:c9862fd0c689 976 } else { /* Cb/Cr component */
WiredHome 115:c9862fd0c689 977 if (b != 0x11) {
WiredHome 115:c9862fd0c689 978 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 979 return JDR_FMT3; /* Err: Sampling factor of Cr/Cb must be 1 */
WiredHome 115:c9862fd0c689 980 }
WiredHome 115:c9862fd0c689 981 }
WiredHome 115:c9862fd0c689 982 b = seg[8 + 3 * i]; /* Get dequantizer table ID for this component */
WiredHome 115:c9862fd0c689 983 if (b > 3) {
WiredHome 115:c9862fd0c689 984 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 985 return JDR_FMT3; /* Err: Invalid ID */
WiredHome 115:c9862fd0c689 986 }
WiredHome 115:c9862fd0c689 987 jd->qtid[i] = b;
WiredHome 115:c9862fd0c689 988 }
WiredHome 115:c9862fd0c689 989 break;
WiredHome 115:c9862fd0c689 990
WiredHome 115:c9862fd0c689 991 case 0xDD: /* DRI */
WiredHome 115:c9862fd0c689 992 /* Load segment data */
WiredHome 115:c9862fd0c689 993 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 994 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 995 return JDR_MEM2;
WiredHome 115:c9862fd0c689 996 }
WiredHome 115:c9862fd0c689 997 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 998 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 999 return JDR_INP;
WiredHome 115:c9862fd0c689 1000 }
WiredHome 115:c9862fd0c689 1001
WiredHome 115:c9862fd0c689 1002 /* Get restart interval (MCUs) */
WiredHome 115:c9862fd0c689 1003 jd->nrst = LDB_WORD(seg);
WiredHome 115:c9862fd0c689 1004 break;
WiredHome 115:c9862fd0c689 1005
WiredHome 115:c9862fd0c689 1006 case 0xC4: /* DHT */
WiredHome 115:c9862fd0c689 1007 /* Load segment data */
WiredHome 115:c9862fd0c689 1008 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1009 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1010 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1011 }
WiredHome 115:c9862fd0c689 1012 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1013 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1014 return JDR_INP;
WiredHome 115:c9862fd0c689 1015 }
WiredHome 115:c9862fd0c689 1016
WiredHome 115:c9862fd0c689 1017 /* Create huffman tables */
WiredHome 115:c9862fd0c689 1018 INFO("next - create_huffman_tbl()");
WiredHome 115:c9862fd0c689 1019 rc = (JRESULT)create_huffman_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1020 if (rc) {
WiredHome 115:c9862fd0c689 1021 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1022 return rc;
WiredHome 115:c9862fd0c689 1023 }
WiredHome 115:c9862fd0c689 1024 break;
WiredHome 115:c9862fd0c689 1025
WiredHome 115:c9862fd0c689 1026 case 0xDB: /* DQT */
WiredHome 115:c9862fd0c689 1027 /* Load segment data */
WiredHome 115:c9862fd0c689 1028 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1029 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1030 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1031 }
WiredHome 115:c9862fd0c689 1032 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1033 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1034 return JDR_INP;
WiredHome 115:c9862fd0c689 1035 }
WiredHome 115:c9862fd0c689 1036
WiredHome 115:c9862fd0c689 1037 /* Create de-quantizer tables */
WiredHome 115:c9862fd0c689 1038 rc = (JRESULT)create_qt_tbl(jd, seg, len);
WiredHome 115:c9862fd0c689 1039 if (rc) {
WiredHome 115:c9862fd0c689 1040 ERR("rc = %d", rc);
WiredHome 115:c9862fd0c689 1041 return rc;
WiredHome 115:c9862fd0c689 1042 }
WiredHome 115:c9862fd0c689 1043 break;
WiredHome 115:c9862fd0c689 1044
WiredHome 115:c9862fd0c689 1045 case 0xDA: /* SOS */
WiredHome 115:c9862fd0c689 1046 /* Load segment data */
WiredHome 115:c9862fd0c689 1047 if (len > JD_SZBUF) {
WiredHome 115:c9862fd0c689 1048 ERR("JDR_MEM2");
WiredHome 115:c9862fd0c689 1049 return JDR_MEM2;
WiredHome 115:c9862fd0c689 1050 }
WiredHome 115:c9862fd0c689 1051 if (getJpegData(jd, seg, len) != len) {
WiredHome 115:c9862fd0c689 1052 ERR("JDR_INP");
WiredHome 115:c9862fd0c689 1053 return JDR_INP;
WiredHome 115:c9862fd0c689 1054 }
WiredHome 115:c9862fd0c689 1055
WiredHome 115:c9862fd0c689 1056 if (!jd->width || !jd->height) {
WiredHome 115:c9862fd0c689 1057 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1058 return JDR_FMT1; /* Err: Invalid image size */
WiredHome 115:c9862fd0c689 1059 }
WiredHome 115:c9862fd0c689 1060
WiredHome 115:c9862fd0c689 1061 if (seg[0] != 3) {
WiredHome 115:c9862fd0c689 1062 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1063 return JDR_FMT3; /* Err: Supports only three color components format */
WiredHome 115:c9862fd0c689 1064 }
WiredHome 115:c9862fd0c689 1065
WiredHome 115:c9862fd0c689 1066 /* Check if all tables corresponding to each components have been loaded */
WiredHome 115:c9862fd0c689 1067 for (i = 0; i < 3; i++) {
WiredHome 115:c9862fd0c689 1068 b = seg[2 + 2 * i]; /* Get huffman table ID */
WiredHome 115:c9862fd0c689 1069 if (b != 0x00 && b != 0x11) {
WiredHome 115:c9862fd0c689 1070 ERR("JDR_FMT3");
WiredHome 115:c9862fd0c689 1071 return JDR_FMT3; /* Err: Different table number for DC/AC element */
WiredHome 115:c9862fd0c689 1072 }
WiredHome 115:c9862fd0c689 1073 b = i ? 1 : 0;
WiredHome 115:c9862fd0c689 1074 if (!jd->huffbits[b][0] || !jd->huffbits[b][1]) { /* Check huffman table for this component */
WiredHome 115:c9862fd0c689 1075 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1076 return JDR_FMT1; /* Err: Huffman table not loaded */
WiredHome 115:c9862fd0c689 1077 }
WiredHome 115:c9862fd0c689 1078 if (!jd->qttbl[jd->qtid[i]]) {
WiredHome 115:c9862fd0c689 1079 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1080 return JDR_FMT1; /* Err: Dequantizer table not loaded */
WiredHome 115:c9862fd0c689 1081 }
WiredHome 115:c9862fd0c689 1082 }
WiredHome 115:c9862fd0c689 1083
WiredHome 115:c9862fd0c689 1084 /* Allocate working buffer for MCU and RGB */
WiredHome 115:c9862fd0c689 1085 n = jd->msy * jd->msx; /* Number of Y blocks in the MCU */
WiredHome 115:c9862fd0c689 1086 if (!n) {
WiredHome 115:c9862fd0c689 1087 ERR("JDR_FMT1");
WiredHome 115:c9862fd0c689 1088 return JDR_FMT1; /* Err: SOF0 has not been loaded */
WiredHome 115:c9862fd0c689 1089 }
WiredHome 115:c9862fd0c689 1090 len = n * 64 * 2 + 64; /* Allocate buffer for IDCT and RGB output */
WiredHome 115:c9862fd0c689 1091 if (len < 256) len = 256; /* but at least 256 byte is required for IDCT */
WiredHome 115:c9862fd0c689 1092 jd->workbuf = alloc_pool(jd, len); /* and it may occupy a part of following MCU working buffer for RGB output */
WiredHome 115:c9862fd0c689 1093 if (!jd->workbuf) {
WiredHome 115:c9862fd0c689 1094 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1095 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1096 }
WiredHome 115:c9862fd0c689 1097 jd->mcubuf = (uint8_t *)alloc_pool(jd, (n + 2) * 64); /* Allocate MCU working buffer */
WiredHome 115:c9862fd0c689 1098 if (!jd->mcubuf) {
WiredHome 115:c9862fd0c689 1099 ERR("JDR_MEM1");
WiredHome 115:c9862fd0c689 1100 return JDR_MEM1; /* Err: not enough memory */
WiredHome 115:c9862fd0c689 1101 }
WiredHome 115:c9862fd0c689 1102
WiredHome 115:c9862fd0c689 1103 /* Pre-load the JPEG data to extract it from the bit stream */
WiredHome 115:c9862fd0c689 1104 jd->dptr = seg; jd->dctr = 0; jd->dmsk = 0; /* Prepare to read bit stream */
WiredHome 115:c9862fd0c689 1105 if (ofs %= JD_SZBUF) { /* Align read offset to JD_SZBUF */
WiredHome 115:c9862fd0c689 1106 jd->dctr = getJpegData(jd, seg + ofs, JD_SZBUF - (uint16_t)ofs);
WiredHome 115:c9862fd0c689 1107 jd->dptr = seg + ofs - 1;
WiredHome 115:c9862fd0c689 1108 }
WiredHome 115:c9862fd0c689 1109
WiredHome 115:c9862fd0c689 1110 return JDR_OK; /* Initialization succeeded. Ready to decompress the JPEG image. */
WiredHome 115:c9862fd0c689 1111
WiredHome 115:c9862fd0c689 1112 case 0xC1: /* SOF1 */
WiredHome 115:c9862fd0c689 1113 case 0xC2: /* SOF2 */
WiredHome 115:c9862fd0c689 1114 case 0xC3: /* SOF3 */
WiredHome 115:c9862fd0c689 1115 case 0xC5: /* SOF5 */
WiredHome 115:c9862fd0c689 1116 case 0xC6: /* SOF6 */
WiredHome 115:c9862fd0c689 1117 case 0xC7: /* SOF7 */
WiredHome 115:c9862fd0c689 1118 case 0xC9: /* SOF9 */
WiredHome 115:c9862fd0c689 1119 case 0xCA: /* SOF10 */
WiredHome 115:c9862fd0c689 1120 case 0xCB: /* SOF11 */
WiredHome 115:c9862fd0c689 1121 case 0xCD: /* SOF13 */
WiredHome 115:c9862fd0c689 1122 case 0xCE: /* SOF14 */
WiredHome 115:c9862fd0c689 1123 case 0xCF: /* SOF15 */
WiredHome 115:c9862fd0c689 1124 case 0xD9: /* EOI */
WiredHome 115:c9862fd0c689 1125 return JDR_FMT3; /* Unsuppoted JPEG standard (may be progressive JPEG) */
WiredHome 115:c9862fd0c689 1126
WiredHome 115:c9862fd0c689 1127 default: /* Unknown segment (comment, exif or etc..) */
WiredHome 115:c9862fd0c689 1128 /* Skip segment data */
WiredHome 115:c9862fd0c689 1129 if (getJpegData(jd, 0, len) != len) { /* Null pointer specifies to skip bytes of stream */
WiredHome 115:c9862fd0c689 1130 INFO("Unknown segment");
WiredHome 115:c9862fd0c689 1131 return JDR_INP;
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 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 1141 /* Start to decompress the JPEG picture */
WiredHome 115:c9862fd0c689 1142 /*-----------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 1143
WiredHome 115:c9862fd0c689 1144 JRESULT GraphicsDisplay::jd_decomp (
WiredHome 115:c9862fd0c689 1145 JDEC * jd, /* Initialized decompression object */
WiredHome 115:c9862fd0c689 1146 uint16_t (*outfunc)(JDEC * jd, void * stream, JRECT * rect), /* RGB output function */
WiredHome 115:c9862fd0c689 1147 uint8_t scale /* Output de-scaling factor (0 to 3) */
WiredHome 115:c9862fd0c689 1148 )
WiredHome 115:c9862fd0c689 1149 {
WiredHome 115:c9862fd0c689 1150 uint16_t x, y, mx, my;
WiredHome 115:c9862fd0c689 1151 uint16_t rst, rsc;
WiredHome 115:c9862fd0c689 1152 JRESULT rc;
WiredHome 115:c9862fd0c689 1153
WiredHome 115:c9862fd0c689 1154 INFO("jd_decomp");
WiredHome 115:c9862fd0c689 1155 if (scale > (JD_USE_SCALE ? 3 : 0)) return JDR_PAR;
WiredHome 115:c9862fd0c689 1156 jd->scale = scale;
WiredHome 115:c9862fd0c689 1157
WiredHome 115:c9862fd0c689 1158 mx = jd->msx * 8; my = jd->msy * 8; /* Size of the MCU (pixel) */
WiredHome 115:c9862fd0c689 1159
WiredHome 115:c9862fd0c689 1160 jd->dcv[2] = jd->dcv[1] = jd->dcv[0] = 0; /* Initialize DC values */
WiredHome 115:c9862fd0c689 1161 rst = rsc = 0;
WiredHome 115:c9862fd0c689 1162
WiredHome 115:c9862fd0c689 1163 rc = JDR_OK;
WiredHome 115:c9862fd0c689 1164 for (y = 0; y < jd->height; y += my) { /* Vertical loop of MCUs */
WiredHome 115:c9862fd0c689 1165 for (x = 0; x < jd->width; x += mx) { /* Horizontal loop of MCUs */
WiredHome 115:c9862fd0c689 1166 if (jd->nrst && rst++ == jd->nrst) { /* Process restart interval if enabled */
WiredHome 115:c9862fd0c689 1167 rc = restart(jd, rsc++);
WiredHome 115:c9862fd0c689 1168 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1169 rst = 1;
WiredHome 115:c9862fd0c689 1170 }
WiredHome 115:c9862fd0c689 1171 rc = mcu_load(jd); /* Load an MCU (decompress huffman coded stream and apply IDCT) */
WiredHome 115:c9862fd0c689 1172 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1173 rc = mcu_output(jd, outfunc, x, y); /* Output the MCU (color space conversion, scaling and output) */
WiredHome 115:c9862fd0c689 1174 if (rc != JDR_OK) return rc;
WiredHome 115:c9862fd0c689 1175 }
WiredHome 115:c9862fd0c689 1176 }
WiredHome 115:c9862fd0c689 1177
WiredHome 115:c9862fd0c689 1178 return rc;
WiredHome 115:c9862fd0c689 1179 }