Norimasa Okamoto / Mbed 2 deprecated BaseJpegDecode_example

BaseJpegDeocde exampe program

Dependencies:   BaseJpegDecode Terminal BaseUsbHost mbed mbed-rtos

Fork of BaseJpegDecode by Norimasa Okamoto

BaseJpefDecode.cpp@0:7121d9fb45f4, 2012-10-07 (annotated)

Committer:
va009039
Date:
Sun Oct 07 12:03:40 2012 +0000
Revision:
0:7121d9fb45f4
Child:
1:58dfd5386a92
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:7121d9fb45f4 1 #include "mbed.h"
va009039 0:7121d9fb45f4 2 #include "BaseJpegDecode.h"
va009039 0:7121d9fb45f4 3
va009039 0:7121d9fb45f4 4 #if 0
va009039 0:7121d9fb45f4 5 #define DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);} while(0);
va009039 0:7121d9fb45f4 6 #define DBG_WAIT(A) wait_ms(A)
va009039 0:7121d9fb45f4 7 #else
va009039 0:7121d9fb45f4 8 #define DBG(...)
va009039 0:7121d9fb45f4 9 #define DBG_WAIT(A)
va009039 0:7121d9fb45f4 10 #endif
va009039 0:7121d9fb45f4 11
va009039 0:7121d9fb45f4 12 #define MARK_SOF 0xc0
va009039 0:7121d9fb45f4 13 #define MARK_DHT 0xc4
va009039 0:7121d9fb45f4 14 #define MARK_RST0 0xd0
va009039 0:7121d9fb45f4 15 #define MARK_RST7 0xd7
va009039 0:7121d9fb45f4 16 #define MARK_SOI 0xd8
va009039 0:7121d9fb45f4 17 #define MARK_EOI 0xd9
va009039 0:7121d9fb45f4 18 #define MARK_SOS 0xda
va009039 0:7121d9fb45f4 19 #define MARK_DQT 0xdb
va009039 0:7121d9fb45f4 20 #define MARK_DRI 0xdd
va009039 0:7121d9fb45f4 21 #define MARK_APP 0xe0
va009039 0:7121d9fb45f4 22
va009039 0:7121d9fb45f4 23 #define SEQ_INIT 0
va009039 0:7121d9fb45f4 24 #define SEQ_MARK 1
va009039 0:7121d9fb45f4 25 #define SEQ_LEN 2
va009039 0:7121d9fb45f4 26 #define SEQ_LEN2 3
va009039 0:7121d9fb45f4 27 #define SEQ_SKIP 4
va009039 0:7121d9fb45f4 28 #define SEQ_SOS 5
va009039 0:7121d9fb45f4 29 #define SEQ_SOS2 6
va009039 0:7121d9fb45f4 30
va009039 0:7121d9fb45f4 31 #define HT_DC 0
va009039 0:7121d9fb45f4 32 #define HT_AC 1
va009039 0:7121d9fb45f4 33
va009039 0:7121d9fb45f4 34 BaseJpegDecode::BaseJpegDecode()
va009039 0:7121d9fb45f4 35 {
va009039 0:7121d9fb45f4 36 m_yblocks = JPEG_MCU_YBLOCKS; // 2 or 4
va009039 0:7121d9fb45f4 37 clear();
va009039 0:7121d9fb45f4 38 pHD = new HuffmanDecode;
va009039 0:7121d9fb45f4 39 }
va009039 0:7121d9fb45f4 40
va009039 0:7121d9fb45f4 41 void BaseJpegDecode::clear()
va009039 0:7121d9fb45f4 42 {
va009039 0:7121d9fb45f4 43 m_seq = SEQ_INIT;
va009039 0:7121d9fb45f4 44 }
va009039 0:7121d9fb45f4 45
va009039 0:7121d9fb45f4 46 void BaseJpegDecode::input(uint8_t* buf, int len)
va009039 0:7121d9fb45f4 47 {
va009039 0:7121d9fb45f4 48 for(int i = 0; i < len; i++) {
va009039 0:7121d9fb45f4 49 input(buf[i]);
va009039 0:7121d9fb45f4 50 }
va009039 0:7121d9fb45f4 51 }
va009039 0:7121d9fb45f4 52
va009039 0:7121d9fb45f4 53 void BaseJpegDecode::restart()
va009039 0:7121d9fb45f4 54 {
va009039 0:7121d9fb45f4 55 m_block = 0;
va009039 0:7121d9fb45f4 56 m_scan = 0;
va009039 0:7121d9fb45f4 57 m_old_DC_value[0] = 0;
va009039 0:7121d9fb45f4 58 m_old_DC_value[1] = 0;
va009039 0:7121d9fb45f4 59 m_bitpat.clear();
va009039 0:7121d9fb45f4 60 m_huff = NULL;
va009039 0:7121d9fb45f4 61 }
va009039 0:7121d9fb45f4 62
va009039 0:7121d9fb45f4 63 void BaseJpegDecode::input(uint8_t c)
va009039 0:7121d9fb45f4 64 {
va009039 0:7121d9fb45f4 65 switch(m_seq) {
va009039 0:7121d9fb45f4 66 case SEQ_INIT:
va009039 0:7121d9fb45f4 67 if (c == 0xff) {
va009039 0:7121d9fb45f4 68 m_seq = SEQ_MARK;
va009039 0:7121d9fb45f4 69 }
va009039 0:7121d9fb45f4 70 break;
va009039 0:7121d9fb45f4 71 case SEQ_MARK:
va009039 0:7121d9fb45f4 72 outputMARK(c);
va009039 0:7121d9fb45f4 73 if (c == MARK_SOI || c == MARK_EOI) {
va009039 0:7121d9fb45f4 74 m_seq = SEQ_INIT;
va009039 0:7121d9fb45f4 75 break;
va009039 0:7121d9fb45f4 76 }
va009039 0:7121d9fb45f4 77 m_mark = c;
va009039 0:7121d9fb45f4 78 m_seq = SEQ_LEN;
va009039 0:7121d9fb45f4 79 break;
va009039 0:7121d9fb45f4 80 case SEQ_LEN:
va009039 0:7121d9fb45f4 81 m_skip = c;
va009039 0:7121d9fb45f4 82 m_seq = SEQ_LEN2;
va009039 0:7121d9fb45f4 83 break;
va009039 0:7121d9fb45f4 84 case SEQ_LEN2:
va009039 0:7121d9fb45f4 85 m_skip <<= 8;
va009039 0:7121d9fb45f4 86 m_skip |= c;
va009039 0:7121d9fb45f4 87 m_skip -= 2;
va009039 0:7121d9fb45f4 88 m_seq = SEQ_SKIP;
va009039 0:7121d9fb45f4 89 break;
va009039 0:7121d9fb45f4 90 case SEQ_SKIP:
va009039 0:7121d9fb45f4 91 if (--m_skip > 0) {
va009039 0:7121d9fb45f4 92 break;
va009039 0:7121d9fb45f4 93 }
va009039 0:7121d9fb45f4 94 if (m_mark == MARK_SOS) {
va009039 0:7121d9fb45f4 95 m_seq = SEQ_SOS;
va009039 0:7121d9fb45f4 96 m_mcu = 0;
va009039 0:7121d9fb45f4 97 restart();
va009039 0:7121d9fb45f4 98 break;
va009039 0:7121d9fb45f4 99 }
va009039 0:7121d9fb45f4 100 m_seq = SEQ_INIT;
va009039 0:7121d9fb45f4 101 break;
va009039 0:7121d9fb45f4 102 case SEQ_SOS:
va009039 0:7121d9fb45f4 103 if (c == 0xff) {
va009039 0:7121d9fb45f4 104 m_seq = SEQ_SOS2;
va009039 0:7121d9fb45f4 105 break;
va009039 0:7121d9fb45f4 106 }
va009039 0:7121d9fb45f4 107 inputScan(c);
va009039 0:7121d9fb45f4 108 break;
va009039 0:7121d9fb45f4 109 case SEQ_SOS2:
va009039 0:7121d9fb45f4 110 if (c == 0x00) {
va009039 0:7121d9fb45f4 111 inputScan(0xff);
va009039 0:7121d9fb45f4 112 m_seq = SEQ_SOS;
va009039 0:7121d9fb45f4 113 break;
va009039 0:7121d9fb45f4 114 } else if (c >= MARK_RST0 && c <= MARK_RST7) {
va009039 0:7121d9fb45f4 115 restart();
va009039 0:7121d9fb45f4 116 m_seq = SEQ_SOS;
va009039 0:7121d9fb45f4 117 break;
va009039 0:7121d9fb45f4 118 }
va009039 0:7121d9fb45f4 119 outputMARK(c);
va009039 0:7121d9fb45f4 120 m_seq = SEQ_INIT;
va009039 0:7121d9fb45f4 121 break;
va009039 0:7121d9fb45f4 122 default:
va009039 0:7121d9fb45f4 123 break;
va009039 0:7121d9fb45f4 124 }
va009039 0:7121d9fb45f4 125 }
va009039 0:7121d9fb45f4 126
va009039 0:7121d9fb45f4 127 void BaseJpegDecode::inputScan(uint8_t c)
va009039 0:7121d9fb45f4 128 {
va009039 0:7121d9fb45f4 129 m_bitpat += c;
va009039 0:7121d9fb45f4 130 while(m_bitpat.size() > 0) {
va009039 0:7121d9fb45f4 131 int tc = (m_scan == 0) ? HT_DC : HT_AC;
va009039 0:7121d9fb45f4 132 int th = (m_block < m_yblocks) ? 0 : 1;
va009039 0:7121d9fb45f4 133 DBG("%d %d %08x %d\n", tc, th, m_bitpat.peek(32), m_bitpat.size());
va009039 0:7121d9fb45f4 134 if (m_huff == NULL) {
va009039 0:7121d9fb45f4 135 m_huff = pHD->Lookup(tc, th, &m_bitpat);
va009039 0:7121d9fb45f4 136 if (m_huff == NULL) {
va009039 0:7121d9fb45f4 137 break;
va009039 0:7121d9fb45f4 138 }
va009039 0:7121d9fb45f4 139 m_bitpat.get(m_huff->code_size); // skip code
va009039 0:7121d9fb45f4 140 }
va009039 0:7121d9fb45f4 141 if (m_huff->value_size > m_bitpat.size()) {
va009039 0:7121d9fb45f4 142 break;
va009039 0:7121d9fb45f4 143 }
va009039 0:7121d9fb45f4 144 DBG("%d %d %d %02x\n", m_huff->run, m_huff->value_size, m_huff->code_size, m_huff->code);
va009039 0:7121d9fb45f4 145 int value = pHD->getValue(m_huff, &m_bitpat);
va009039 0:7121d9fb45f4 146 if (tc == HT_DC) {
va009039 0:7121d9fb45f4 147 value += m_old_DC_value[th];
va009039 0:7121d9fb45f4 148 outputDC(m_mcu, m_block, value);
va009039 0:7121d9fb45f4 149 m_old_DC_value[th] = value;
va009039 0:7121d9fb45f4 150 m_scan++;
va009039 0:7121d9fb45f4 151 } else { // AC
va009039 0:7121d9fb45f4 152 if (m_huff->value_size == 0 && m_huff->run == 0) { // EOB
va009039 0:7121d9fb45f4 153 DBG("AC EOB\n");
va009039 0:7121d9fb45f4 154 m_scan = 64;
va009039 0:7121d9fb45f4 155 } else {
va009039 0:7121d9fb45f4 156 for(int i = 0; i < m_huff->run; i++) {
va009039 0:7121d9fb45f4 157 outputAC(m_mcu, m_block, m_scan, 0);
va009039 0:7121d9fb45f4 158 m_scan++;
va009039 0:7121d9fb45f4 159 }
va009039 0:7121d9fb45f4 160 outputAC(m_mcu, m_block, m_scan, value);
va009039 0:7121d9fb45f4 161 m_scan++;
va009039 0:7121d9fb45f4 162 }
va009039 0:7121d9fb45f4 163 if (m_scan >= 64) {
va009039 0:7121d9fb45f4 164 m_scan = 0;
va009039 0:7121d9fb45f4 165 if (++m_block >= (m_yblocks+2)) {
va009039 0:7121d9fb45f4 166 m_block = 0;
va009039 0:7121d9fb45f4 167 m_mcu++;
va009039 0:7121d9fb45f4 168 }
va009039 0:7121d9fb45f4 169 }
va009039 0:7121d9fb45f4 170 }
va009039 0:7121d9fb45f4 171 m_huff = NULL;
va009039 0:7121d9fb45f4 172 }
va009039 0:7121d9fb45f4 173 }