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Diffstat (limited to 'sndobj/AdSyn.cpp')
| -rw-r--r-- | sndobj/AdSyn.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sndobj/AdSyn.cpp b/sndobj/AdSyn.cpp new file mode 100644 index 0000000..2b534d7 --- /dev/null +++ b/sndobj/AdSyn.cpp @@ -0,0 +1,129 @@ + +//////////////////////////////////////////////////////////////////////// +// This file is part of the SndObj library +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program 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 General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// Copyright (c)Victor Lazzarini, 1997-2004 +// See License.txt for a disclaimer of all warranties +// and licensing information + +#include "AdSyn.h" + +AdSyn::AdSyn(){ +} + +AdSyn::AdSyn(SinAnal* input, int maxtracks, Table* table, + float pitch, float scale, int vecsize, float sr) + :ReSyn(input, maxtracks, table, pitch, scale, 1.f, vecsize, sr){ +} + +AdSyn::~AdSyn(){ +} + +short +AdSyn::DoProcess() { + + if(m_input){ + + float ampnext,amp,freq,freqnext,phase; + int i3, i, j, ID, track; + int notcontin = 0; + bool contin = false; + int oldtracks = m_tracks; + float* tab = m_ptable->GetTable(); + if((m_tracks = ((SinAnal *)m_input)->GetTracks()) > + m_maxtracks) m_tracks = m_maxtracks; + memset(m_output, 0, sizeof(float)*m_vecsize); + + // for each track + i = j = 0; + while(i < m_tracks*3){ + + i3 = i/3; + ampnext = m_input->Output(i)*m_scale; + freqnext = m_input->Output(i+1)*m_pitch; + ID = ((SinAnal *)m_input)->GetTrackID(i3); + + j = i3+notcontin; + + if(i3 < oldtracks-notcontin){ + + if(m_trackID[j]==ID){ + // if this is a continuing track + track = j; + contin = true; + freq = m_freqs[track]; + phase = m_phases[track]; + amp = m_amps[track]; + } + else { + // if this is a dead track + contin = false; + track = j; + freqnext = freq = m_freqs[track]; + phase = m_phases[track]; + amp = m_amps[track]; + ampnext = 0.f; + } + } + else{ + // new tracks + contin = true; + track = -1; + freq = freqnext; + phase = -freq*m_factor; + amp = 0.f; + } + + // interpolation & track synthesis loop + float a,f,frac,incra,incrph; + int ndx; + a = amp; + f = freq; + incra = (ampnext - amp)/m_vecsize; + incrph = (freqnext - freq)/m_vecsize; + for(m_vecpos=0; m_vecpos < m_vecsize; m_vecpos++){ + if(m_enable) { + // table lookup oscillator + phase += f*m_ratio; + while(phase < 0) phase += m_size; + while(phase >= m_size) phase -= m_size; + ndx = Ftoi(phase); + frac = phase - ndx; + m_output[m_vecpos] += a*(tab[ndx] + (tab[ndx+1] - tab[ndx])*frac); + a += incra; + f += incrph; + } + else m_output[m_vecpos] = 0.f; + } + + // keep amp, freq, and phase values for next time + if(contin){ + m_amps[i3] = ampnext; + m_freqs[i3] = freqnext; + m_phases[i3] = phase; + m_trackID[i3] = ID; + i += 3; + } else notcontin++; + } + return 1; + } + else { + m_error = 1; + return 0; + } + +} |