diff --git a/ap/app/qrencode/mqrspec.c b/ap/app/qrencode/mqrspec.c
new file mode 100644
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+++ b/ap/app/qrencode/mqrspec.c
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+/*
+ * qrencode - QR Code encoder
+ *
+ * Micor QR Code specification in convenient format. 
+ * Copyright (C) 2006-2011 Kentaro Fukuchi <kentaro@fukuchi.org>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ *  or
+ * "Automatic identification and data capture techniques -- 
+ *  QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#ifdef HAVE_LIBPTHREAD
+#include <pthread.h>
+#endif
+
+#include "mqrspec.h"
+
+/******************************************************************************
+ * Version and capacity
+ *****************************************************************************/
+
+typedef struct {
+	int width; //< Edge length of the symbol
+	int ec[4];  //< Number of ECC code (bytes)
+} MQRspec_Capacity;
+
+/**
+ * Table of the capacity of symbols
+ * See Table 1 (pp.106) and Table 8 (pp.113) of Appendix 1, JIS X0510:2004.
+ */
+static const MQRspec_Capacity mqrspecCapacity[MQRSPEC_VERSION_MAX + 1] = {
+	{  0, {0,  0,  0, 0}},
+	{ 11, {2,  0,  0, 0}},
+	{ 13, {5,  6,  0, 0}},
+	{ 15, {6,  8,  0, 0}},
+	{ 17, {8, 10, 14, 0}}
+};
+
+int MQRspec_getDataLengthBit(int version, QRecLevel level)
+{
+	int w;
+	int ecc;
+
+	w = mqrspecCapacity[version].width - 1;
+	ecc = mqrspecCapacity[version].ec[level];
+	if(ecc == 0) return 0;
+	return w * w - 64 - ecc * 8;
+}
+
+int MQRspec_getDataLength(int version, QRecLevel level)
+{
+	return (MQRspec_getDataLengthBit(version, level) + 4) / 8;
+}
+
+int MQRspec_getECCLength(int version, QRecLevel level)
+{
+	return mqrspecCapacity[version].ec[level];
+}
+
+int MQRspec_getWidth(int version)
+{
+	return mqrspecCapacity[version].width;
+}
+
+/******************************************************************************
+ * Length indicator
+ *****************************************************************************/
+
+/**
+ * See Table 3 (pp.107) of Appendix 1, JIS X0510:2004.
+ */
+static const int lengthTableBits[4][4] = {
+	{ 3, 4, 5, 6},
+	{ 0, 3, 4, 5},
+	{ 0, 0, 4, 5},
+	{ 0, 0, 3, 4}
+};
+
+int MQRspec_lengthIndicator(QRencodeMode mode, int version)
+{
+	return lengthTableBits[mode][version - 1];
+}
+
+int MQRspec_maximumWords(QRencodeMode mode, int version)
+{
+	int bits;
+	int words;
+
+	bits = lengthTableBits[mode][version - 1];
+	words = (1 << bits) - 1;
+	if(mode == QR_MODE_KANJI) {
+		words *= 2; // the number of bytes is required
+	}
+
+	return words;
+}
+
+/******************************************************************************
+ * Format information
+ *****************************************************************************/
+
+/* See calcFormatInfo in tests/test_mqrspec.c */
+static const unsigned int formatInfo[4][8] = {
+	{0x4445, 0x55ae, 0x6793, 0x7678, 0x06de, 0x1735, 0x2508, 0x34e3},
+	{0x4172, 0x5099, 0x62a4, 0x734f, 0x03e9, 0x1202, 0x203f, 0x31d4},
+	{0x4e2b, 0x5fc0, 0x6dfd, 0x7c16, 0x0cb0, 0x1d5b, 0x2f66, 0x3e8d},
+	{0x4b1c, 0x5af7, 0x68ca, 0x7921, 0x0987, 0x186c, 0x2a51, 0x3bba}
+};
+
+/* See Table 10 of Appendix 1. (pp.115) */
+static const int typeTable[MQRSPEC_VERSION_MAX + 1][3] = {
+	{-1, -1, -1},
+	{ 0, -1, -1},
+	{ 1,  2, -1},
+	{ 3,  4, -1},
+	{ 5,  6,  7}
+};
+
+unsigned int MQRspec_getFormatInfo(int mask, int version, QRecLevel level)
+{
+	int type;
+
+	if(mask < 0 || mask > 3) return 0;
+	if(version <= 0 || version > MQRSPEC_VERSION_MAX) return 0;
+	if(level == QR_ECLEVEL_H) return 0;
+	type = typeTable[version][level];
+	if(type < 0) return 0;
+
+	return formatInfo[mask][type];
+}
+
+/******************************************************************************
+ * Frame
+ *****************************************************************************/
+
+/**
+ * Cache of initial frames.
+ */
+/* C99 says that static storage shall be initialized to a null pointer
+ * by compiler. */
+static unsigned char *frames[MQRSPEC_VERSION_MAX + 1];
+#ifdef HAVE_LIBPTHREAD
+static pthread_mutex_t frames_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+/**
+ * Put a finder pattern.
+ * @param frame
+ * @param width
+ * @param ox,oy upper-left coordinate of the pattern
+ */
+static void putFinderPattern(unsigned char *frame, int width, int ox, int oy)
+{
+	static const unsigned char finder[] = {
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc1, 0xc1, 0xc1, 0xc0, 0xc1,
+		0xc1, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc1,
+		0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1, 0xc1,
+	};
+	int x, y;
+	const unsigned char *s;
+
+	frame += oy * width + ox;
+	s = finder;
+	for(y=0; y<7; y++) {
+		for(x=0; x<7; x++) {
+			frame[x] = s[x];
+		}
+		frame += width;
+		s += 7;
+	}
+}
+
+static unsigned char *MQRspec_createFrame(int version)
+{
+	unsigned char *frame, *p, *q;
+	int width;
+	int x, y;
+
+	width = mqrspecCapacity[version].width;
+	frame = (unsigned char *)malloc(width * width);
+	if(frame == NULL) return NULL;
+
+	memset(frame, 0, width * width);
+	/* Finder pattern */
+	putFinderPattern(frame, width, 0, 0);
+	/* Separator */
+	p = frame;
+	for(y=0; y<7; y++) {
+		p[7] = 0xc0;
+		p += width;
+	}
+	memset(frame + width * 7, 0xc0, 8);
+	/* Mask format information area */
+	memset(frame + width * 8 + 1, 0x84, 8);
+	p = frame + width + 8;
+	for(y=0; y<7; y++) {
+		*p = 0x84;
+		p += width;
+	}
+	/* Timing pattern */
+	p = frame + 8;
+	q = frame + width * 8;
+	for(x=1; x<width-7; x++) {
+		*p =  0x90 | (x & 1);
+		*q =  0x90 | (x & 1);
+		p++;
+		q += width;
+	}
+
+	return frame;
+}
+
+unsigned char *MQRspec_newFrame(int version)
+{
+	unsigned char *frame;
+	int width;
+
+	if(version < 1 || version > MQRSPEC_VERSION_MAX) return NULL;
+
+#ifdef HAVE_LIBPTHREAD
+	pthread_mutex_lock(&frames_mutex);
+#endif
+	if(frames[version] == NULL) {
+		frames[version] = MQRspec_createFrame(version);
+	}
+#ifdef HAVE_LIBPTHREAD
+	pthread_mutex_unlock(&frames_mutex);
+#endif
+	if(frames[version] == NULL) return NULL;
+
+	width = mqrspecCapacity[version].width;
+	frame = (unsigned char *)malloc(width * width);
+	if(frame == NULL) return NULL;
+	memcpy(frame, frames[version], width * width);
+
+	return frame;
+}
+
+void MQRspec_clearCache(void)
+{
+	int i;
+
+#ifdef HAVE_LIBPTHREAD
+	pthread_mutex_lock(&frames_mutex);
+#endif
+	for(i=1; i<=MQRSPEC_VERSION_MAX; i++) {
+		free(frames[i]);
+		frames[i] = NULL;
+	}
+#ifdef HAVE_LIBPTHREAD
+	pthread_mutex_unlock(&frames_mutex);
+#endif
+}