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editor_timefx.cc

/*
    Copyright (C) 2000 Paul Davis 

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <iostream>
#include <cstdlib>
#include <cmath>

#include <string>

#include <pbd/error.h>
#include <pbd/pthread_utils.h>
#include <pbd/memento_command.h>

#include <gtkmm2ext/window_title.h>
#include <gtkmm2ext/utils.h>

#include "editor.h"
#include "audio_time_axis.h"
#include "audio_region_view.h"
#include "region_selection.h"

#include <ardour/session.h>
#include <ardour/region.h>
#include <ardour/audioplaylist.h>
#include <ardour/audio_track.h>
#include <ardour/audioregion.h>
#include <ardour/audio_diskstream.h>
#include <ardour/stretch.h>
#include <ardour/pitch.h>

#ifdef USE_RUBBERBAND
#include <rubberband/RubberBandStretcher.h>
using namespace RubberBand;
#endif

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace sigc;
using namespace Gtk;
using namespace Gtkmm2ext;

Editor::TimeFXDialog::TimeFXDialog (Editor& e, bool pitch)
      : ArdourDialog (X_("time fx dialog")),
        editor (e),
        pitching (pitch),
        pitch_octave_adjustment (0.0, -4.0, 4.0, 1, 2.0),
        pitch_semitone_adjustment (0.0, -12.0, 12.0, 1.0, 4.0),
        pitch_cent_adjustment (0.0, -499.0, 500.0, 5.0, 15.0),
        pitch_octave_spinner (pitch_octave_adjustment),
        pitch_semitone_spinner (pitch_semitone_adjustment),
        pitch_cent_spinner (pitch_cent_adjustment),
        quick_button (_("Quick but Ugly")),
        antialias_button (_("Skip Anti-aliasing")),
        stretch_opts_label (_("Contents:")),
        precise_button (_("Strict Linear"))
{
      set_modal (true);
      set_position (Gtk::WIN_POS_MOUSE);
      set_name (N_("TimeFXDialog"));

      WindowTitle title(Glib::get_application_name());
      if (pitching) {
            title += _("Pitch Shift");
      } else {
            title += _("Time Stretch");
      }
      set_title(title.get_string());

      cancel_button = add_button (_("Cancel"), Gtk::RESPONSE_CANCEL);

      get_vbox()->set_spacing (5);
      get_vbox()->set_border_width (12);

      if (pitching) {

            upper_button_box.set_spacing (5);
            upper_button_box.set_border_width (5);
            
            Gtk::Label* l;

            l = manage (new Label (_("Octaves")));
            upper_button_box.pack_start (*l, false, false);
            upper_button_box.pack_start (pitch_octave_spinner, false, false);

            l = manage (new Label (_("Semitones (12TET)")));
            upper_button_box.pack_start (*l, false, false);
            upper_button_box.pack_start (pitch_semitone_spinner, false, false);

            l = manage (new Label (_("Cents")));
            upper_button_box.pack_start (*l, false, false);
            upper_button_box.pack_start (pitch_cent_spinner, false, false);

            pitch_cent_spinner.set_digits (1);

            add_button (_("Shift"), Gtk::RESPONSE_ACCEPT);

            get_vbox()->pack_start (upper_button_box, false, false);

      } else {

#ifdef USE_RUBBERBAND
            opts_box.set_spacing (5);
            opts_box.set_border_width (5);
            vector<string> strings;

            set_popdown_strings (stretch_opts_selector, editor.rb_opt_strings);
            /* set default */
            stretch_opts_selector.set_active_text (editor.rb_opt_strings[4]);

            opts_box.pack_start (precise_button, false, false);
            opts_box.pack_start (stretch_opts_label, false, false);
            opts_box.pack_start (stretch_opts_selector, false, false);

            get_vbox()->pack_start (opts_box, false, false);

#else
            upper_button_box.set_homogeneous (true);
            upper_button_box.set_spacing (5);
            upper_button_box.set_border_width (5);

            upper_button_box.pack_start (quick_button, true, true);
            upper_button_box.pack_start (antialias_button, true, true);

            quick_button.set_name (N_("TimeFXButton"));
            antialias_button.set_name (N_("TimeFXButton"));

            get_vbox()->pack_start (upper_button_box, false, false);

#endif      
            add_button (_("Stretch/Shrink"), Gtk::RESPONSE_ACCEPT);
      }

      get_vbox()->pack_start (progress_bar);

      progress_bar.set_name (N_("TimeFXProgress"));

      show_all_children ();
}

gint
Editor::TimeFXDialog::update_progress ()
{
      progress_bar.set_fraction (request.progress);
      return !request.done;
}

void
Editor::TimeFXDialog::cancel_in_progress ()
{
      status = -2;
      request.cancel = true;
      first_cancel.disconnect();
}

gint
Editor::TimeFXDialog::delete_in_progress (GdkEventAny* ev)
{
      status = -2;
      request.cancel = true;
      first_delete.disconnect();
      return TRUE;
}

int
Editor::time_stretch (RegionSelection& regions, float fraction)
{
      return time_fx (regions, fraction, false);
}

int
Editor::pitch_shift (RegionSelection& regions, float fraction)
{
      return time_fx (regions, fraction, true);
}

int
Editor::time_fx (RegionSelection& regions, float val, bool pitching)
{
      if (current_timefx != 0) {
            delete current_timefx;
      }

      current_timefx = new TimeFXDialog (*this, pitching);

      current_timefx->progress_bar.set_fraction (0.0f);

      switch (current_timefx->run ()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            current_timefx->hide ();
            return 1;
      }

      current_timefx->status = 0;
      current_timefx->regions = regions;

      if (pitching) {

            float cents = current_timefx->pitch_octave_adjustment.get_value() * 1200.0;
            float pitch_fraction;
            cents += current_timefx->pitch_semitone_adjustment.get_value() * 100.0;
            cents += current_timefx->pitch_cent_adjustment.get_value();

            if (cents == 0.0) {
                  // user didn't change anything
                  current_timefx->hide ();
                  return 0;
            }

            // one octave == 1200 cents
            // adding one octave doubles the frequency
            // ratio is 2^^octaves
                        
            pitch_fraction = pow(2, cents/1200);

            current_timefx->request.time_fraction = 1.0;
            current_timefx->request.pitch_fraction = pitch_fraction;
            
      } else {

            current_timefx->request.time_fraction = val;
            current_timefx->request.pitch_fraction = 1.0;

      }

#ifdef USE_RUBBERBAND
      /* parse options */

      RubberBandStretcher::Options options = 0;

      bool realtime = false;
      bool precise = false;
      bool peaklock = true;
      bool softening = true;
      bool longwin = false;
      bool shortwin = false;
      string txt;

      enum {
            NoTransients,
            BandLimitedTransients,
            Transients
      } transients = Transients;
      
      precise = current_timefx->precise_button.get_active();
      
      txt = current_timefx->stretch_opts_selector.get_active_text ();

      if (txt == rb_opt_strings[0]) {
            transients = NoTransients; peaklock = false; longwin = true; shortwin = false; 
      } else if (txt == rb_opt_strings[1]) {
            transients = NoTransients; peaklock = false; longwin = false; shortwin = false; 
      } else if (txt == rb_opt_strings[2]) {
            transients = NoTransients; peaklock = true; longwin = false; shortwin = false; 
      } else if (txt == rb_opt_strings[3]) {
            transients = BandLimitedTransients; peaklock = true; longwin = false; shortwin = false; 
      } else if (txt == rb_opt_strings[5]) {
            transients = Transients; peaklock = false; longwin = false; shortwin = true; 
      } else {
            /* default/4 */

            transients = Transients; peaklock = true; longwin = false; shortwin = false; 
      };


      if (realtime)    options |= RubberBandStretcher::OptionProcessRealTime;
      if (precise)     options |= RubberBandStretcher::OptionStretchPrecise;
      if (!peaklock)   options |= RubberBandStretcher::OptionPhaseIndependent;
      if (!softening)  options |= RubberBandStretcher::OptionPhasePeakLocked;
      if (longwin)     options |= RubberBandStretcher::OptionWindowLong;
      if (shortwin)    options |= RubberBandStretcher::OptionWindowShort;
            
      switch (transients) {
      case NoTransients:
            options |= RubberBandStretcher::OptionTransientsSmooth;
            break;
      case BandLimitedTransients:
            options |= RubberBandStretcher::OptionTransientsMixed;
            break;
      case Transients:
            options |= RubberBandStretcher::OptionTransientsCrisp;
            break;
      }

      current_timefx->request.opts = (int) options;
#else
      current_timefx->request.quick_seek = current_timefx->quick_button.get_active();
      current_timefx->request.antialias = !current_timefx->antialias_button.get_active();
#endif
      current_timefx->request.progress = 0.0f;
      current_timefx->request.done = false;
      current_timefx->request.cancel = false;
      
      /* re-connect the cancel button and delete events */
      
      current_timefx->first_cancel.disconnect();
      current_timefx->first_delete.disconnect();
      
      current_timefx->first_cancel = current_timefx->cancel_button->signal_clicked().connect 
            (mem_fun (current_timefx, &TimeFXDialog::cancel_in_progress));
      current_timefx->first_delete = current_timefx->signal_delete_event().connect 
            (mem_fun (current_timefx, &TimeFXDialog::delete_in_progress));

      if (pthread_create_and_store ("timefx", &current_timefx->request.thread, 0, timefx_thread, current_timefx)) {
            current_timefx->hide ();
            error << _("timefx cannot be started - thread creation error") << endmsg;
            return -1;
      }

      pthread_detach (current_timefx->request.thread);

      sigc::connection c = Glib::signal_timeout().connect (mem_fun (current_timefx, &TimeFXDialog::update_progress), 100);

      while (!current_timefx->request.done && !current_timefx->request.cancel) {
            gtk_main_iteration ();
      }

      c.disconnect ();
      
      current_timefx->hide ();
      return current_timefx->status;
}

void
Editor::do_timefx (TimeFXDialog& dialog)
{
      Track*    t;
      boost::shared_ptr<Playlist> playlist;
      boost::shared_ptr<Region>   new_region;
      bool in_command = false;
      
      for (RegionSelection::iterator i = dialog.regions.begin(); i != dialog.regions.end(); ) {
            AudioRegionView* arv = dynamic_cast<AudioRegionView*>(*i);

            if (!arv) {
                  continue;
            }

            boost::shared_ptr<AudioRegion> region (arv->audio_region());
            TimeAxisView* tv = &(arv->get_time_axis_view());
            RouteTimeAxisView* rtv;
            RegionSelection::iterator tmp;
            
            tmp = i;
            ++tmp;

            if ((rtv = dynamic_cast<RouteTimeAxisView*> (tv)) == 0) {
                  i = tmp;
                  continue;
            }

            if ((t = dynamic_cast<Track*> (rtv->route().get())) == 0) {
                  i = tmp;
                  continue;
            }
      
            if ((playlist = t->diskstream()->playlist()) == 0) {
                  i = tmp;
                  continue;
            }

            if (dialog.request.cancel) {
                  /* we were cancelled */
                  dialog.status = 1;
                  return;
            }

            AudioFilter* fx;

            if (dialog.pitching) {
                  fx = new Pitch (*session, dialog.request);
            } else {
                  fx = new Stretch (*session, dialog.request);
            }

            if (fx->run (region)) {
                  dialog.status = -1;
                  dialog.request.done = true;
                  delete fx;
                  return;
            }

            if (!fx->results.empty()) {
                  new_region = fx->results.front();

                  if (!in_command) {
                        begin_reversible_command (dialog.pitching ? _("pitch shift") : _("time stretch"));
                        in_command = true;
                  }

                  XMLNode &before = playlist->get_state();
                  playlist->replace_region (region, new_region, region->position());
                  XMLNode &after = playlist->get_state();
                  session->add_command (new MementoCommand<Playlist>(*playlist, &before, &after));
            }

            i = tmp;
            delete fx;
      }

      if (in_command) {
            commit_reversible_command ();
      }

      dialog.status = 0;
      dialog.request.done = true;
}

void*
Editor::timefx_thread (void *arg)
{
      PBD::ThreadCreated (pthread_self(), X_("TimeFX"));

      TimeFXDialog* tsd = static_cast<TimeFXDialog*>(arg);

      pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);

      tsd->editor.do_timefx (*tsd);

      return 0;
}


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