Jonathan Naylor
7 years ago
parent
2e4aa40dd5
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d92a894cd5
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/*
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* Copyright (C) 2012,2013,2015,2017 by Jonathan Naylor G4KLX
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* Copyright (C) 2011 by DV Developer Group. DJ0ABR
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "DTMF.h"
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const unsigned char DTMF_MASK[] = {0x82U, 0x08U, 0x20U, 0x82U, 0x00U, 0x00U, 0x82U, 0x00U, 0x00U};
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const unsigned char DTMF_SIG[] = {0x82U, 0x08U, 0x20U, 0x82U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
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const unsigned char DTMF_SYM_MASK[] = {0x10U, 0x40U, 0x08U, 0x20U};
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const unsigned char DTMF_SYM0[] = {0x00U, 0x40U, 0x08U, 0x20U};
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const unsigned char DTMF_SYM1[] = {0x00U, 0x00U, 0x00U, 0x00U};
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const unsigned char DTMF_SYM2[] = {0x00U, 0x40U, 0x00U, 0x00U};
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const unsigned char DTMF_SYM3[] = {0x10U, 0x00U, 0x00U, 0x00U};
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const unsigned char DTMF_SYM4[] = {0x00U, 0x00U, 0x00U, 0x20U};
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const unsigned char DTMF_SYM5[] = {0x00U, 0x40U, 0x00U, 0x20U};
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const unsigned char DTMF_SYM6[] = {0x10U, 0x00U, 0x00U, 0x20U};
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const unsigned char DTMF_SYM7[] = {0x00U, 0x00U, 0x08U, 0x00U};
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const unsigned char DTMF_SYM8[] = {0x00U, 0x40U, 0x08U, 0x00U};
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const unsigned char DTMF_SYM9[] = {0x10U, 0x00U, 0x08U, 0x00U};
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const unsigned char DTMF_SYMA[] = {0x10U, 0x40U, 0x00U, 0x00U};
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const unsigned char DTMF_SYMB[] = {0x10U, 0x40U, 0x00U, 0x20U};
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const unsigned char DTMF_SYMC[] = {0x10U, 0x40U, 0x08U, 0x00U};
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const unsigned char DTMF_SYMD[] = {0x10U, 0x40U, 0x08U, 0x20U};
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const unsigned char DTMF_SYMS[] = {0x00U, 0x00U, 0x08U, 0x20U};
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const unsigned char DTMF_SYMH[] = {0x10U, 0x00U, 0x08U, 0x20U};
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CDTMF::CDTMF() :
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m_data(),
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m_command(),
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m_pressed(false),
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m_releaseCount(0U),
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m_pressCount(0U),
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m_lastChar(' ')
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{
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}
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CDTMF::~CDTMF()
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{
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}
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bool CDTMF::decode(const unsigned char* ambe, bool end)
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{
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// DTMF begins with these byte values
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if (!end && (ambe[0] & DTMF_MASK[0]) == DTMF_SIG[0] && (ambe[1] & DTMF_MASK[1]) == DTMF_SIG[1] &&
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(ambe[2] & DTMF_MASK[2]) == DTMF_SIG[2] && (ambe[3] & DTMF_MASK[3]) == DTMF_SIG[3] &&
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(ambe[4] & DTMF_MASK[4]) == DTMF_SIG[4] && (ambe[5] & DTMF_MASK[5]) == DTMF_SIG[5] &&
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(ambe[6] & DTMF_MASK[6]) == DTMF_SIG[6] && (ambe[7] & DTMF_MASK[7]) == DTMF_SIG[7] &&
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(ambe[8] & DTMF_MASK[8]) == DTMF_SIG[8]) {
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unsigned char sym0 = ambe[4] & DTMF_SYM_MASK[0];
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unsigned char sym1 = ambe[5] & DTMF_SYM_MASK[1];
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unsigned char sym2 = ambe[7] & DTMF_SYM_MASK[2];
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unsigned char sym3 = ambe[8] & DTMF_SYM_MASK[3];
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char c = ' ';
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if (sym0 == DTMF_SYM0[0] && sym1 == DTMF_SYM0[1] && sym2 == DTMF_SYM0[2] && sym3 == DTMF_SYM0[3])
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c = '0';
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else if (sym0 == DTMF_SYM1[0] && sym1 == DTMF_SYM1[1] && sym2 == DTMF_SYM1[2] && sym3 == DTMF_SYM1[3])
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c = '1';
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else if (sym0 == DTMF_SYM2[0] && sym1 == DTMF_SYM2[1] && sym2 == DTMF_SYM2[2] && sym3 == DTMF_SYM2[3])
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c = '2';
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else if (sym0 == DTMF_SYM3[0] && sym1 == DTMF_SYM3[1] && sym2 == DTMF_SYM3[2] && sym3 == DTMF_SYM3[3])
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c = '3';
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else if (sym0 == DTMF_SYM4[0] && sym1 == DTMF_SYM4[1] && sym2 == DTMF_SYM4[2] && sym3 == DTMF_SYM4[3])
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c = '4';
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else if (sym0 == DTMF_SYM5[0] && sym1 == DTMF_SYM5[1] && sym2 == DTMF_SYM5[2] && sym3 == DTMF_SYM5[3])
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c = '5';
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else if (sym0 == DTMF_SYM6[0] && sym1 == DTMF_SYM6[1] && sym2 == DTMF_SYM6[2] && sym3 == DTMF_SYM6[3])
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c = '6';
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else if (sym0 == DTMF_SYM7[0] && sym1 == DTMF_SYM7[1] && sym2 == DTMF_SYM7[2] && sym3 == DTMF_SYM7[3])
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c = '7';
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else if (sym0 == DTMF_SYM8[0] && sym1 == DTMF_SYM8[1] && sym2 == DTMF_SYM8[2] && sym3 == DTMF_SYM8[3])
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c = '8';
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else if (sym0 == DTMF_SYM9[0] && sym1 == DTMF_SYM9[1] && sym2 == DTMF_SYM9[2] && sym3 == DTMF_SYM9[3])
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c = '9';
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else if (sym0 == DTMF_SYMA[0] && sym1 == DTMF_SYMA[1] && sym2 == DTMF_SYMA[2] && sym3 == DTMF_SYMA[3])
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c = 'A';
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else if (sym0 == DTMF_SYMB[0] && sym1 == DTMF_SYMB[1] && sym2 == DTMF_SYMB[2] && sym3 == DTMF_SYMB[3])
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c = 'B';
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else if (sym0 == DTMF_SYMC[0] && sym1 == DTMF_SYMC[1] && sym2 == DTMF_SYMC[2] && sym3 == DTMF_SYMC[3])
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c = 'C';
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else if (sym0 == DTMF_SYMD[0] && sym1 == DTMF_SYMD[1] && sym2 == DTMF_SYMD[2] && sym3 == DTMF_SYMD[3])
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c = 'D';
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else if (sym0 == DTMF_SYMS[0] && sym1 == DTMF_SYMS[1] && sym2 == DTMF_SYMS[2] && sym3 == DTMF_SYMS[3])
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c = '*';
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else if (sym0 == DTMF_SYMH[0] && sym1 == DTMF_SYMH[1] && sym2 == DTMF_SYMH[2] && sym3 == DTMF_SYMH[3])
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c = '#';
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if (c == m_lastChar) {
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m_pressCount++;
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} else {
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m_lastChar = c;
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m_pressCount = 0U;
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}
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if (c != ' ' && !m_pressed && m_pressCount >= 3U) {
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m_data += c;
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m_releaseCount = 0U;
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m_pressed = true;
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}
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return c != ' ';
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} else {
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// If it is not a DTMF Code
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if ((end || m_releaseCount >= 100U) && m_data.length() > 0U) {
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m_command = m_data;
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m_data.clear();
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m_releaseCount = 0U;
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}
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m_pressed = false;
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m_releaseCount++;
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m_pressCount = 0U;
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m_lastChar = ' ';
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return false;
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}
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}
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bool CDTMF::hasCommand() const
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{
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return !m_command.empty();
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}
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// DTMF to YOUR call command
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std::string CDTMF::translate()
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{
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std::string command = m_command;
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m_command.clear();
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if (command.at(0U) == '#')
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return command;
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return "";
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}
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void CDTMF::reset()
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{
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m_data.clear();
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m_command.clear();
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m_pressed = false;
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m_pressCount = 0U;
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m_releaseCount = 0U;
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m_lastChar = ' ';
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}
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@ -0,0 +1,46 @@
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/*
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* Copyright (C) 2012,2013,2017 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef DTMF_H
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#define DTMF_H
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#include <string>
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class CDTMF {
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public:
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CDTMF();
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~CDTMF();
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bool decode(const unsigned char* ambe, bool end);
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bool hasCommand() const;
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std::string translate();
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void reset();
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private:
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std::string m_data;
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std::string m_command;
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bool m_pressed;
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unsigned int m_releaseCount;
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unsigned int m_pressCount;
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char m_lastChar;
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};
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#endif
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