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Viewing changes to libecasound/audiogate.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Junichi Uekawa
  • Date: 2008-09-26 09:58:52 UTC
  • mfrom: (1.1.6 upstream)
  • Revision ID: james.westby@ubuntu.com-20080926095852-k3v9ewhmxpaltusw
Tags: 2.5.2-3
yodl 2.13.1 removed --unique-output option. Remove --unique-output
accordingly.

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libecasound/audiogate.cpp
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// ------------------------------------------------------------------------
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// audiogate.cpp: Signal gates.
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// Copyright (C) 1999-2002,2005-2007 Kai Vehmanen
 
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// Copyright (C) 1999-2002,2005-2008 Kai Vehmanen
 
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// Copyrtigh (C) 2008 Andrew Lees
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//
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// Attributes:
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//     eca-style-version: 3
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void GATE_BASE::init(SAMPLE_BUFFER* sbuf)
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{ 
 
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  gate_open = false;
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  target = sbuf;
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}
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  durtime_rep = duration;
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  position_in_samples_rep = 0;
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  ECA_LOG_MSG(ECA_LOGGER::info, "(audiogate) Time crop gate created; opens at " +
 
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  ECA_LOG_MSG(ECA_LOGGER::info, "Time crop gate created; opens at " +
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              kvu_numtostr(begtime_rep) + " seconds and stays open for " +
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              kvu_numtostr(durtime_rep) + " seconds.\n");
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}
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  openlevel_rep = threshold_openlevel / 100.0;
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  closelevel_rep = threshold_closelevel / 100.0;
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  rms_rep = use_rms;
 
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  reopen_count_param_rep = 0;
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  is_opened_rep = is_closed_rep = false;
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  if (rms_rep) {
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    ECA_LOG_MSG(ECA_LOGGER::info, "(audiogate) Threshold gate created; open threshold " +
 
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    ECA_LOG_MSG(ECA_LOGGER::info, "Threshold gate created; open threshold " +
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                kvu_numtostr(openlevel_rep * 100) + "%, close threshold " +
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                kvu_numtostr(closelevel_rep * 100) + "%, using RMS volume.");
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  }
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  else {
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    ECA_LOG_MSG(ECA_LOGGER::info, "(audiogate) Threshold gate created; open threshold " +
 
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    ECA_LOG_MSG(ECA_LOGGER::info, "Threshold gate created; open threshold " +
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                kvu_numtostr(openlevel_rep * 100) + "%, close threshold " +
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                kvu_numtostr(closelevel_rep * 100) + "%, using peak volume.");
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  }
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}
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void THRESHOLD_GATE::init(SAMPLE_BUFFER* sbuf)
 
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{
 
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  reopens_left_rep = reopen_count_param_rep;
 
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  is_opened_rep = false;
 
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  is_closed_rep = false;
 
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  GATE_BASE::init(sbuf);
 
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}
 
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void THRESHOLD_GATE::analyze(SAMPLE_BUFFER* sbuf)
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{
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  if (rms_rep == true)
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  if (is_opened_rep == false) {
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    if (avolume_rep > openlevel_rep) { 
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      open_gate();
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      ECA_LOG_MSG(ECA_LOGGER::user_objects, "Threshold gate opened.");
 
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      ECA_LOG_MSG(ECA_LOGGER::user_objects, "Threshold gate opened (reopen count = " + kvu_numtostr(reopens_left_rep) + ")");
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      is_opened_rep = true;
 
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      is_closed_rep = false;
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    }
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  }
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  else if (is_closed_rep == false) {
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    if (avolume_rep < closelevel_rep) { 
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      close_gate();
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      ECA_LOG_MSG(ECA_LOGGER::user_objects, "Threshold gate closed.");
 
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      ECA_LOG_MSG(ECA_LOGGER::user_objects, "Threshold gate closed (reopens left = " + kvu_numtostr(reopens_left_rep) + ")");
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      is_closed_rep = true;
 
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      if (reopens_left_rep != 0) {
 
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        is_opened_rep = false;
 
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        if (reopens_left_rep > 0)
 
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          --reopens_left_rep;
 
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      } else {
 
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        // - Could we stop the engine and exit here, maybe? -AL/2008-Jul
 
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        // - Not from a chain operator, but the audio object
 
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        //   that writes the stream to a file could in
 
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        //   theory react in a special way to the 0-length 
 
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        //   samplebuffers we generate when the gate is closed... -KV/2008-Jul
 
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      }
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    }
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  }
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}
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      return 1.0;
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    else 
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      return 0.0;
 
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  case 4:
 
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    return reopen_count_param_rep;
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  }
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  return 0.0;
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}
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    closelevel_rep = value / 100.0;
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    break;
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  case 3: 
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    if (value != 0) 
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      rms_rep = true;
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    else 
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      rms_rep = false;
 
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    rms_rep = (value != 0);
 
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    break;
 
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  case 4:
 
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    reopen_count_param_rep = static_cast<int>(value);
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    break;
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  }
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}