617 lines
21 KiB
C++
Executable File
617 lines
21 KiB
C++
Executable File
/******************************************************************************\
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* Copyright (c) 2004-2014
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*
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* Author(s):
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* Volker Fischer
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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\******************************************************************************/
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#include "util.h"
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/* Implementation *************************************************************/
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// Input level meter implementation --------------------------------------------
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void CStereoSignalLevelMeter::Update ( CVector<short>& vecsAudio )
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{
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// get the stereo vector size
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const int iStereoVecSize = vecsAudio.Size();
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// Get maximum of current block
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//
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// Speed optimization:
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// - we only make use of the positive values and ignore the negative ones
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// -> we do not need to call the fabs() function
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// - we only evaluate every third sample
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//
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// With these speed optimizations we might loose some information in
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// special cases but for the average music signals the following code
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// should give good results.
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//
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short sMaxL = 0;
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short sMaxR = 0;
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for ( int i = 0; i < iStereoVecSize; i += 6 ) // 2 * 3 = 6 -> stereo
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{
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// left channel
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sMaxL = std::max ( sMaxL, vecsAudio[i] );
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// right channel
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sMaxR = std::max ( sMaxR, vecsAudio[i + 1] );
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}
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dCurLevelL = UpdateCurLevel ( dCurLevelL, sMaxL );
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dCurLevelR = UpdateCurLevel ( dCurLevelR, sMaxR );
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}
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double CStereoSignalLevelMeter::UpdateCurLevel ( double dCurLevel,
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const short& sMax )
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{
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// decrease max with time
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if ( dCurLevel >= METER_FLY_BACK )
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{
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// TODO calculate factor from sample rate
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dCurLevel *= 0.95;
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}
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else
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{
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dCurLevel = 0;
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}
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// update current level -> only use maximum
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if ( static_cast<double> ( sMax ) > dCurLevel )
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{
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return static_cast<double> ( sMax );
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}
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else
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{
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return dCurLevel;
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}
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}
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double CStereoSignalLevelMeter::CalcLogResult ( const double& dLinearLevel )
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{
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const double dNormMicLevel = dLinearLevel / _MAXSHORT;
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// logarithmic measure
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if ( dNormMicLevel > 0 )
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{
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return 20.0 * log10 ( dNormMicLevel );
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}
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else
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{
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return -100000.0; // large negative value
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}
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}
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// CRC -------------------------------------------------------------------------
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void CCRC::Reset()
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{
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// init state shift-register with ones. Set all registers to "1" with
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// bit-wise not operation
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iStateShiftReg = ~uint32_t ( 0 );
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}
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void CCRC::AddByte ( const uint8_t byNewInput )
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{
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for ( int i = 0; i < 8; i++ )
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{
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// shift bits in shift-register for transistion
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iStateShiftReg <<= 1;
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// take bit, which was shifted out of the register-size and place it
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// at the beginning (LSB)
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// (If condition is not satisfied, implicitely a "0" is added)
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if ( ( iStateShiftReg & iBitOutMask) > 0 )
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{
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iStateShiftReg |= 1;
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}
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// add new data bit to the LSB
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if ( ( byNewInput & ( 1 << ( 8 - i - 1 ) ) ) > 0 )
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{
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iStateShiftReg ^= 1;
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}
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// add mask to shift-register if first bit is true
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if ( iStateShiftReg & 1 )
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{
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iStateShiftReg ^= iPoly;
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}
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}
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}
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uint32_t CCRC::GetCRC()
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{
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// return inverted shift-register (1's complement)
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iStateShiftReg = ~iStateShiftReg;
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// remove bit which where shifted out of the shift-register frame
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return iStateShiftReg & ( iBitOutMask - 1 );
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}
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/******************************************************************************\
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* Audio Reverberation *
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\******************************************************************************/
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/*
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The following code is based on "JCRev: John Chowning's reverberator class"
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by Perry R. Cook and Gary P. Scavone, 1995 - 2004
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which is in "The Synthesis ToolKit in C++ (STK)"
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http://ccrma.stanford.edu/software/stk
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Original description:
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This class is derived from the CLM JCRev function, which is based on the use
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of networks of simple allpass and comb delay filters. This class implements
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three series allpass units, followed by four parallel comb filters, and two
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decorrelation delay lines in parallel at the output.
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*/
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void CAudioReverb::Init ( const int iSampleRate,
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const double rT60 )
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{
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int delay, i;
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// delay lengths for 44100 Hz sample rate
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int lengths[9] = { 1116, 1356, 1422, 1617, 225, 341, 441, 211, 179 };
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const double scaler = (double) iSampleRate / 44100.0;
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if ( scaler != 1.0 )
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{
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for ( i = 0; i < 9; i++ )
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{
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delay = (int) floor ( scaler * lengths[i] );
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if ( ( delay & 1 ) == 0 )
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{
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delay++;
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}
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while ( !isPrime ( delay ) )
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{
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delay += 2;
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}
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lengths[i] = delay;
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}
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}
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for ( i = 0; i < 3; i++ )
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{
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allpassDelays[i].Init ( lengths[i + 4] );
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}
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for ( i = 0; i < 4; i++ )
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{
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combDelays[i].Init ( lengths[i] );
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combFilters[i].setPole ( 0.2 );
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}
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setT60 ( rT60, iSampleRate );
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outLeftDelay.Init ( lengths[7] );
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outRightDelay.Init ( lengths[8] );
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allpassCoefficient = (double) 0.7;
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Clear();
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}
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bool CAudioReverb::isPrime ( const int number )
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{
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/*
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Returns true if argument value is prime. Taken from "class Effect" in
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"STK abstract effects parent class".
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*/
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if ( number == 2 )
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{
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return true;
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}
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if ( number & 1 )
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{
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for ( int i = 3; i < (int) sqrt ( (double) number ) + 1; i += 2 )
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{
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if ( ( number % i ) == 0 )
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{
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return false;
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}
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}
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return true; // prime
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}
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else
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{
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return false; // even
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}
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}
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void CAudioReverb::Clear()
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{
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// reset and clear all internal state
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allpassDelays[0].Reset ( 0 );
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allpassDelays[1].Reset ( 0 );
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allpassDelays[2].Reset ( 0 );
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combDelays[0].Reset ( 0 );
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combDelays[1].Reset ( 0 );
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combDelays[2].Reset ( 0 );
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combDelays[3].Reset ( 0 );
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combFilters[0].Reset();
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combFilters[1].Reset();
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combFilters[2].Reset();
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combFilters[3].Reset();
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outRightDelay.Reset ( 0 );
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outLeftDelay.Reset ( 0 );
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}
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void CAudioReverb::setT60 ( const double rT60,
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const int iSampleRate )
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{
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// set the reverberation T60 decay time
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for ( int i = 0; i < 4; i++ )
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{
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combCoefficient[i] = pow ( (double) 10.0, (double) ( -3.0 *
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combDelays[i].Size() / ( rT60 * iSampleRate ) ) );
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}
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}
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void CAudioReverb::COnePole::setPole ( const double dPole )
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{
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// calculate IIR filter coefficients based on the pole value
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dA = -dPole;
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dB = 1.0 - dPole;
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}
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double CAudioReverb::COnePole::Calc ( const double dIn )
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{
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// calculate IIR filter
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dLastSample = dB * dIn - dA * dLastSample;
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return dLastSample;
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}
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void CAudioReverb::ProcessSample ( int16_t& iInputOutputLeft,
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int16_t& iInputOutputRight,
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const double dAttenuation )
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{
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// compute one output sample
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double temp, temp0, temp1, temp2;
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// we sum up the stereo input channels (in case mono input is used, a zero
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// shall be input for the right channel)
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const double dMixedInput = 0.5 * ( iInputOutputLeft + iInputOutputRight );
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temp = allpassDelays[0].Get();
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temp0 = allpassCoefficient * temp;
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temp0 += dMixedInput;
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allpassDelays[0].Add ( temp0 );
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temp0 = - ( allpassCoefficient * temp0 ) + temp;
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temp = allpassDelays[1].Get();
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temp1 = allpassCoefficient * temp;
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temp1 += temp0;
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allpassDelays[1].Add ( temp1 );
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temp1 = - ( allpassCoefficient * temp1 ) + temp;
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temp = allpassDelays[2].Get();
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temp2 = allpassCoefficient * temp;
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temp2 += temp1;
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allpassDelays[2].Add ( temp2 );
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temp2 = - ( allpassCoefficient * temp2 ) + temp;
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const double temp3 = temp2 + combFilters[0].Calc ( combCoefficient[0] * combDelays[0].Get() );
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const double temp4 = temp2 + combFilters[1].Calc ( combCoefficient[1] * combDelays[1].Get() );
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const double temp5 = temp2 + combFilters[2].Calc ( combCoefficient[2] * combDelays[2].Get() );
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const double temp6 = temp2 + combFilters[3].Calc ( combCoefficient[3] * combDelays[3].Get() );
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combDelays[0].Add ( temp3 );
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combDelays[1].Add ( temp4 );
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combDelays[2].Add ( temp5 );
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combDelays[3].Add ( temp6 );
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const double filtout = temp3 + temp4 + temp5 + temp6;
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outLeftDelay.Add ( filtout );
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outRightDelay.Add ( filtout );
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// inplace apply the attenuated reverb signal
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iInputOutputLeft = Double2Short (
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( 1.0 - dAttenuation ) * iInputOutputLeft +
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0.5 * dAttenuation * outLeftDelay.Get() );
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iInputOutputRight = Double2Short (
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( 1.0 - dAttenuation ) * iInputOutputRight +
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0.5 * dAttenuation * outRightDelay.Get() );
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}
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/******************************************************************************\
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* GUI Utilities *
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\******************************************************************************/
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// About dialog ----------------------------------------------------------------
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CAboutDlg::CAboutDlg ( QWidget* parent ) : QDialog ( parent )
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{
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setupUi ( this );
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// set the text for the about dialog html text control
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txvCredits->setOpenExternalLinks ( true );
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txvCredits->setText (
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"<p>" // general description of software
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"<big>" + tr( "The " ) + APP_NAME +
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tr ( " software enables musicians to perform real-time jam sessions "
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"over the internet. There is a " ) + APP_NAME + tr ( " "
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"server which collects the audio data from each " ) +
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APP_NAME + tr ( " client, mixes the audio data and sends the mix back "
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"to each client.") + "</big></p><br>"
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"<p><font face=\"courier\">" // GPL header text
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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.<br>This program is distributed in "
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"the hope that it will be useful, but WITHOUT ANY WARRANTY; without "
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"even the implied warranty of MERCHANTABILITY or FITNESS FOR A "
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"PARTICULAR PURPOSE. See the GNU General Public License for more "
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"details.<br>You should have received a copy of the GNU General Public "
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"License along with his program; if not, write to the Free Software "
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"Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 "
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"USA"
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"</font></p><br>"
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"<p><b>" + APP_NAME + // libraries used by this compilation
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tr ( " uses the following libraries, resources or code snippets:" ) +
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"</b></p>"
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"<ul>"
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"<li>Qt cross-platform application framework: "
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"<i><a href=""http://qt.digia.com"">http://qt.digia.com</a></i></li>"
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"<li>Opus Interactive Audio Codec: "
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"<i><a href=""http://www.opus-codec.org"">http://www.opus-codec.org</a></i></li>"
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"<li>Audio reverberation code: by Perry R. Cook and Gary P. Scavone, "
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"1995 - 2004 (taken from "
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"<i><a href=""http://ccrma.stanford.edu/software/stk"">"
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"The Synthesis ToolKit in C++ (STK)</a></i>)</li>"
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"<li>Some pixmaps are from the Open Clip Art Library (OCAL): "
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"<i><a href=""http://openclipart.org"">http://openclipart.org</a></i></li>"
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"</ul>"
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"</center><br>");
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// set version number in about dialog
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lblVersion->setText ( GetVersionAndNameStr() );
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// set window title
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setWindowTitle ( tr ( "About " ) + APP_NAME );
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}
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QString CAboutDlg::GetVersionAndNameStr ( const bool bWithHtml )
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{
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QString strVersionText = "";
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// name, short description and GPL hint
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if ( bWithHtml )
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{
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strVersionText += "<center><b>";
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}
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else
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{
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strVersionText += " *** ";
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}
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strVersionText += APP_NAME + tr ( ", Version " ) + VERSION;
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if ( bWithHtml )
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{
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strVersionText += "</b><br>";
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}
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else
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{
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strVersionText += "\n *** ";
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}
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strVersionText += tr ( "Internet Jam Session Software" );
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if ( bWithHtml )
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{
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strVersionText += "<br>";
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}
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else
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{
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strVersionText += "\n *** ";
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}
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strVersionText += tr ( "Under the GNU General Public License (GPL)" );
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if ( bWithHtml )
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{
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strVersionText += "</center>";
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}
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return strVersionText;
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}
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// Help menu -------------------------------------------------------------------
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CHelpMenu::CHelpMenu ( QWidget* parent ) : QMenu ( "&?", parent )
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{
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// standard help menu consists of about and what's this help
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addAction ( tr ( "What's &This" ), this,
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SLOT ( OnHelpWhatsThis() ), QKeySequence ( Qt::SHIFT + Qt::Key_F1 ) );
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addSeparator();
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addAction ( tr ( "&Download Link..." ), this,
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SLOT ( OnHelpDownloadLink() ) );
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addSeparator();
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addAction ( tr ( "&About..." ), this, SLOT ( OnHelpAbout() ) );
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}
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/******************************************************************************\
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* Other Classes *
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\******************************************************************************/
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// Network utility functions ---------------------------------------------------
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bool NetworkUtil::ParseNetworkAddress ( QString strAddress,
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CHostAddress& HostAddress )
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{
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QHostAddress InetAddr;
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quint16 iNetPort = LLCON_DEFAULT_PORT_NUMBER;
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// init requested host address with invalid address first
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HostAddress = CHostAddress();
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// parse input address for the type [IP address]:[port number]
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QString strPort = strAddress.section ( ":", 1, 1 );
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if ( !strPort.isEmpty() )
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{
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// a colon is present in the address string, try to extract port number
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iNetPort = strPort.toInt();
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// extract address port before colon (should be actual internet address)
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strAddress = strAddress.section ( ":", 0, 0 );
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}
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// first try if this is an IP number an can directly applied to QHostAddress
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if ( !InetAddr.setAddress ( strAddress ) )
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{
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// it was no vaild IP address, try to get host by name, assuming
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// that the string contains a valid host name string
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const QHostInfo HostInfo = QHostInfo::fromName ( strAddress );
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if ( HostInfo.error() == QHostInfo::NoError )
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{
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// apply IP address to QT object
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if ( !HostInfo.addresses().isEmpty() )
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{
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// use the first IP address
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InetAddr = HostInfo.addresses().first();
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}
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}
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else
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{
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return false; // invalid address
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}
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}
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HostAddress = CHostAddress ( InetAddr, iNetPort );
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return true;
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}
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// Instrument picture data base ------------------------------------------------
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CVector<CInstPictures::CInstPictProps>& CInstPictures::GetTable()
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{
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// make sure we generate the table only once
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static bool TableIsInitialized = false;
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static CVector<CInstPictProps> vecDataBase;
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if ( !TableIsInitialized )
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{
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// instrument picture data base initialization
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// NOTE: Do not change the order of any instrument in the future!
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// NOTE: The very first entry is the "not used" element per definition.
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vecDataBase.Add ( CInstPictProps ( "None", ":/png/instr/res/instrnone.png", IC_OTHER_INSTRUMENT ) ); // special first element
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vecDataBase.Add ( CInstPictProps ( "Drum Set", ":/png/instr/res/instrdrumset.png", IC_PERCUSSION_INSTRUMENT ) );
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vecDataBase.Add ( CInstPictProps ( "Djembe", ":/png/instr/res/instrdjembe.png", IC_PERCUSSION_INSTRUMENT ) );
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vecDataBase.Add ( CInstPictProps ( "Electric Guitar", ":/png/instr/res/instreguitar.png", IC_PLUCKING_INSTRUMENT ) );
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vecDataBase.Add ( CInstPictProps ( "Acoutic Guitar", ":/png/instr/res/instraguitar.png", IC_PLUCKING_INSTRUMENT ) );
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vecDataBase.Add ( CInstPictProps ( "Bass Guitar", ":/png/instr/res/instrbassguitar.png", IC_PLUCKING_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Keyboard", ":/png/instr/res/instrkeyboard.png", IC_KEYBOARD_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Synthesizer", ":/png/instr/res/instrsynthesizer.png", IC_KEYBOARD_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Grand Piano", ":/png/instr/res/instrgrandpiano.png", IC_KEYBOARD_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Accordeon", ":/png/instr/res/instraccordeon.png", IC_KEYBOARD_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Vocal", ":/png/instr/res/instrvocal.png", IC_OTHER_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Microphone", ":/png/instr/res/instrmicrophone.png", IC_OTHER_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Harmonica", ":/png/instr/res/instrharmonica.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Trumpet", ":/png/instr/res/instrtrumpet.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Trombone", ":/png/instr/res/instrtrombone.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "French Horn", ":/png/instr/res/instrfrenchhorn.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Tuba", ":/png/instr/res/instrtuba.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Saxophone", ":/png/instr/res/instrsaxophone.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Clarinet", ":/png/instr/res/instrclarinet.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Flute", ":/png/instr/res/instrflute.png", IC_WIND_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Violin", ":/png/instr/res/instrviolin.png", IC_STRING_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Cello", ":/png/instr/res/instrcello.png", IC_STRING_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Double Bass", ":/png/instr/res/instrdoublebass.png", IC_STRING_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Recorder", ":/png/instr/res/instrrecorder.png", IC_OTHER_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Streamer", ":/png/instr/res/instrstreamer.png", IC_OTHER_INSTRUMENT ) );
|
|
vecDataBase.Add ( CInstPictProps ( "Listener", ":/png/instr/res/instrlistener.png", IC_OTHER_INSTRUMENT ) );
|
|
|
|
// now the table is initialized
|
|
TableIsInitialized = true;
|
|
}
|
|
|
|
return vecDataBase;
|
|
}
|
|
|
|
bool CInstPictures::IsInstIndexInRange ( const int iIdx )
|
|
{
|
|
// check if index is in valid range
|
|
return ( iIdx >= 0 ) && ( iIdx < GetTable().Size() );
|
|
}
|
|
|
|
QString CInstPictures::GetResourceReference ( const int iInstrument )
|
|
{
|
|
// range check
|
|
if ( IsInstIndexInRange ( iInstrument ) )
|
|
{
|
|
// return the string of the resource reference for accessing the picture
|
|
return GetTable()[iInstrument].strResourceReference;
|
|
}
|
|
else
|
|
{
|
|
return "";
|
|
}
|
|
}
|
|
|
|
QString CInstPictures::GetName ( const int iInstrument )
|
|
{
|
|
// range check
|
|
if ( IsInstIndexInRange ( iInstrument ) )
|
|
{
|
|
// return the name of the instrument
|
|
return GetTable()[iInstrument].strName;
|
|
}
|
|
else
|
|
{
|
|
return "";
|
|
}
|
|
}
|
|
|
|
|
|
|
|
/******************************************************************************\
|
|
* Global Functions Implementation *
|
|
\******************************************************************************/
|
|
void DebugError ( const QString& pchErDescr,
|
|
const QString& pchPar1Descr,
|
|
const double dPar1,
|
|
const QString& pchPar2Descr,
|
|
const double dPar2 )
|
|
{
|
|
QFile File ( "DebugError.dat" );
|
|
if ( File.open ( QIODevice::Append ) )
|
|
{
|
|
// append new line in logging file
|
|
QTextStream out ( &File );
|
|
out << pchErDescr << " ### " <<
|
|
pchPar1Descr << ": " << QString().setNum ( dPar1, 'f', 2 ) <<
|
|
" ### " <<
|
|
pchPar2Descr << ": " << QString().setNum ( dPar2, 'f', 2 ) <<
|
|
endl;
|
|
|
|
File.close();
|
|
}
|
|
printf ( "\nDebug error! For more information see test/DebugError.dat\n" );
|
|
exit ( 1 );
|
|
}
|