Norimasa Okamoto / Mbed 2 deprecated BaseJpegDecode_example

BaseJpegDeocde exampe program

Dependencies:   BaseJpegDecode Terminal BaseUsbHost mbed mbed-rtos

Fork of BaseJpegDecode by Norimasa Okamoto

SimpleJpegDecode.cpp@6:95be1cd2bc14, 2012-12-05 (annotated)

Committer:
va009039
Date:
Wed Dec 05 12:41:25 2012 +0000
Revision:
6:95be1cd2bc14
Parent:
5:033432f9baf3 
update FATFileASystem and BaseJpegDecode

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 4:7d88de31c55a 1 #include "SimpleJpegDecode.h"
va009039 4:7d88de31c55a 2
va009039 4:7d88de31c55a 3 #define DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);} while(0);
va009039 4:7d88de31c55a 4 #define ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
va009039 4:7d88de31c55a 5
va009039 5:033432f9baf3 6
va009039 5:033432f9baf3 7 #define _1_4020 45
va009039 5:033432f9baf3 8 #define _0_3441 11
va009039 5:033432f9baf3 9 #define _0_7139 23
va009039 5:033432f9baf3 10 #define _1_7718 57
va009039 5:033432f9baf3 11 #define _0_0012 0
va009039 5:033432f9baf3 12
va009039 5:033432f9baf3 13 int adjust(int r) {
va009039 5:033432f9baf3 14 if (r >= 0) {
va009039 5:033432f9baf3 15 if (r <= 255) {
va009039 5:033432f9baf3 16 return r;
va009039 5:033432f9baf3 17 } else {
va009039 5:033432f9baf3 18 return 255;
va009039 5:033432f9baf3 19 }
va009039 5:033432f9baf3 20 } else {
va009039 5:033432f9baf3 21 return 0;
va009039 5:033432f9baf3 22 }
va009039 5:033432f9baf3 23 }
va009039 5:033432f9baf3 24
va009039 5:033432f9baf3 25 void convYUVtoRGB(uint8_t rgb[], int y, int u, int v)
va009039 4:7d88de31c55a 26 {
va009039 5:033432f9baf3 27 rgb[0] = adjust((y*32 + v*_1_4020)/32 + 128);
va009039 5:033432f9baf3 28 rgb[1] = adjust((y*32 - u*_0_3441 - v*_0_7139)/32 + 128);
va009039 5:033432f9baf3 29 rgb[2] = adjust((y*32 + u*_1_7718 - v*_0_0012)/32 + 128);
va009039 5:033432f9baf3 30 }
va009039 5:033432f9baf3 31
va009039 5:033432f9baf3 32 SimpleJpegDecode::SimpleJpegDecode(uint8_t output_mode)
va009039 5:033432f9baf3 33 {
va009039 5:033432f9baf3 34 m_output_mode = output_mode;
va009039 4:7d88de31c55a 35 clearOnResult();
va009039 4:7d88de31c55a 36 }
va009039 4:7d88de31c55a 37
va009039 5:033432f9baf3 38
va009039 4:7d88de31c55a 39 void SimpleJpegDecode::output(int mcu, int block, int scan, int value)
va009039 4:7d88de31c55a 40 {
va009039 5:033432f9baf3 41 int sc = (block < yblock) ? 0 : 1;
va009039 4:7d88de31c55a 42 inputBLOCK(mcu, block, scan, value * qt[sc][scan]);
va009039 4:7d88de31c55a 43 }
va009039 4:7d88de31c55a 44
va009039 4:7d88de31c55a 45 void SimpleJpegDecode::outputDC(int mcu, int block, int value)
va009039 4:7d88de31c55a 46 {
va009039 4:7d88de31c55a 47 output(mcu, block, 0, value);
va009039 4:7d88de31c55a 48 DC_count++;
va009039 4:7d88de31c55a 49 }
va009039 4:7d88de31c55a 50
va009039 4:7d88de31c55a 51 void SimpleJpegDecode::outputAC(int mcu, int block, int scan, int value)
va009039 4:7d88de31c55a 52 {
va009039 4:7d88de31c55a 53 output(mcu, block, scan, value);
va009039 4:7d88de31c55a 54 AC_count++;
va009039 4:7d88de31c55a 55 }
va009039 4:7d88de31c55a 56
va009039 4:7d88de31c55a 57 void SimpleJpegDecode::outputMARK(uint8_t c)
va009039 4:7d88de31c55a 58 {
va009039 4:7d88de31c55a 59 }
va009039 4:7d88de31c55a 60
va009039 5:033432f9baf3 61 void SimpleJpegDecode::format_YUV(int mcu, int block, int8_t* values)
va009039 4:7d88de31c55a 62 {
va009039 5:033432f9baf3 63 if (block < yblock+1) {
va009039 5:033432f9baf3 64 memcpy(m_block_data[block], values, 64);
va009039 4:7d88de31c55a 65 return;
va009039 4:7d88de31c55a 66 }
va009039 5:033432f9baf3 67 int mcu_x_count = (width+15)/16;
va009039 5:033432f9baf3 68 int mcu_x = mcu % mcu_x_count;
va009039 5:033432f9baf3 69 int mcu_y = mcu / mcu_x_count;
va009039 4:7d88de31c55a 70 uint8_t yuv[3];
va009039 5:033432f9baf3 71 if (yblock == 2) {
va009039 4:7d88de31c55a 72 for(int y = 0; y < 8; y++) {
va009039 4:7d88de31c55a 73 for(int x = 0; x < 16; x++) {
va009039 5:033432f9baf3 74 yuv[0] = m_block_data[x/8][y*8+x%8] + 128;
va009039 5:033432f9baf3 75 yuv[1] = m_block_data[2][y*8+x/2] + 128;
va009039 5:033432f9baf3 76 yuv[2] = values[y*8+x/2] + 128;
va009039 4:7d88de31c55a 77 onResult(mcu_x * 16 + x, mcu_y * 8 + y, yuv);
va009039 4:7d88de31c55a 78 }
va009039 4:7d88de31c55a 79 }
va009039 5:033432f9baf3 80 } else if (yblock == 4) {
va009039 4:7d88de31c55a 81 for(int y = 0; y < 16; y++) {
va009039 4:7d88de31c55a 82 for(int x = 0; x < 16; x++) {
va009039 5:033432f9baf3 83 yuv[0] = m_block_data[(y/8)*2+x/8][(y%8)*8+x%8] + 128;
va009039 5:033432f9baf3 84 yuv[1] = m_block_data[4][(y/2)*8+x/2] + 128;
va009039 5:033432f9baf3 85 yuv[2] = values[(y/2)*8+x/2] + 128;
va009039 4:7d88de31c55a 86 onResult(mcu_x * 16 + x, mcu_y * 16 + y, yuv);
va009039 4:7d88de31c55a 87 }
va009039 4:7d88de31c55a 88 }
va009039 4:7d88de31c55a 89 } else {
va009039 5:033432f9baf3 90 ASSERT(yblock == 2 || yblock == 4);
va009039 5:033432f9baf3 91 }
va009039 5:033432f9baf3 92 }
va009039 5:033432f9baf3 93
va009039 5:033432f9baf3 94 void SimpleJpegDecode::format_RGB24(int mcu, int block, int8_t* values)
va009039 5:033432f9baf3 95 {
va009039 5:033432f9baf3 96 if (block < yblock+1) {
va009039 5:033432f9baf3 97 memcpy(m_block_data[block], values, 64);
va009039 5:033432f9baf3 98 return;
va009039 5:033432f9baf3 99 }
va009039 5:033432f9baf3 100 int mcu_x_count = (width+15)/16;
va009039 5:033432f9baf3 101 int mcu_x = mcu % mcu_x_count;
va009039 5:033432f9baf3 102 int mcu_y = mcu / mcu_x_count;
va009039 5:033432f9baf3 103 uint8_t rgb[3];
va009039 5:033432f9baf3 104 if (yblock == 2) {
va009039 5:033432f9baf3 105 for(int y = 0; y < 8; y++) {
va009039 5:033432f9baf3 106 for(int x = 0; x < 16; x++) {
va009039 5:033432f9baf3 107 int8_t yuv_y = m_block_data[x/8][y*8+x%8];
va009039 5:033432f9baf3 108 int8_t yuv_u = m_block_data[2][y*8+x/2];
va009039 5:033432f9baf3 109 int8_t yuv_v = values[y*8+x/2];
va009039 5:033432f9baf3 110 convYUVtoRGB(rgb, yuv_y, yuv_u, yuv_v);
va009039 5:033432f9baf3 111 onResult(mcu_x * 16 + x, mcu_y * 8 + y, rgb);
va009039 5:033432f9baf3 112 }
va009039 5:033432f9baf3 113 }
va009039 5:033432f9baf3 114 } else if (yblock == 4) {
va009039 5:033432f9baf3 115 for(int y = 0; y < 16; y++) {
va009039 5:033432f9baf3 116 for(int x = 0; x < 16; x++) {
va009039 5:033432f9baf3 117 int8_t yuv_y = m_block_data[(y/8)*2+x/8][(y%8)*8+x%8];
va009039 5:033432f9baf3 118 int8_t yuv_u = m_block_data[4][(y/2)*8+x/2];
va009039 5:033432f9baf3 119 int8_t yuv_v = values[(y/2)*8+x/2];
va009039 5:033432f9baf3 120 convYUVtoRGB(rgb, yuv_y, yuv_u, yuv_v);
va009039 5:033432f9baf3 121 onResult(mcu_x * 16 + x, mcu_y * 16 + y, rgb);
va009039 5:033432f9baf3 122 }
va009039 5:033432f9baf3 123 }
va009039 5:033432f9baf3 124 } else {
va009039 5:033432f9baf3 125 ASSERT(yblock == 2 || yblock == 4);
va009039 5:033432f9baf3 126 }
va009039 5:033432f9baf3 127 }
va009039 5:033432f9baf3 128
va009039 5:033432f9baf3 129 void SimpleJpegDecode::outputBLOCK(int mcu, int block, int8_t* values)
va009039 5:033432f9baf3 130 {
va009039 5:033432f9baf3 131 BLOCK_count++;
va009039 5:033432f9baf3 132 if (m_output_mode == YUV) {
va009039 5:033432f9baf3 133 format_YUV(mcu, block, values);
va009039 5:033432f9baf3 134 } else if (m_output_mode == RGB24) {
va009039 5:033432f9baf3 135 format_RGB24(mcu, block, values);
va009039 5:033432f9baf3 136 } else {
va009039 5:033432f9baf3 137 ASSERT(m_output_mode == YUV || m_output_mode == RGB24);
va009039 4:7d88de31c55a 138 }
va009039 4:7d88de31c55a 139 }
va009039 4:7d88de31c55a 140
va009039 4:7d88de31c55a 141 void SimpleJpegDecode::onResult(int x, int y, uint8_t* yuv)
va009039 4:7d88de31c55a 142 {
va009039 4:7d88de31c55a 143 if(m_pCbItem && m_pCbMeth)
va009039 4:7d88de31c55a 144 (m_pCbItem->*m_pCbMeth)(x, y, yuv);
va009039 4:7d88de31c55a 145 else if(m_pCb)
va009039 4:7d88de31c55a 146 m_pCb(x, y, yuv);
va009039 4:7d88de31c55a 147 }
va009039 4:7d88de31c55a 148
va009039 4:7d88de31c55a 149 void SimpleJpegDecode::setOnResult( void (*pMethod)(int, int, uint8_t*) )
va009039 4:7d88de31c55a 150 {
va009039 4:7d88de31c55a 151 m_pCb = pMethod;
va009039 4:7d88de31c55a 152 m_pCbItem = NULL;
va009039 4:7d88de31c55a 153 m_pCbMeth = NULL;
va009039 4:7d88de31c55a 154 }
va009039 4:7d88de31c55a 155
va009039 4:7d88de31c55a 156 void SimpleJpegDecode::clearOnResult()
va009039 4:7d88de31c55a 157 {
va009039 4:7d88de31c55a 158 m_pCb = NULL;
va009039 4:7d88de31c55a 159 m_pCbItem = NULL;
va009039 4:7d88de31c55a 160 m_pCbMeth = NULL;
va009039 4:7d88de31c55a 161 }