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editor_export_audio.cc

/*
    Copyright (C) 2001 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.

    $Id: editor_export_audio.cc,v 1.34 2005/09/22 03:26:04 pauld Exp $
*/

#include <unistd.h>
#include <climits>
#include "export_dialog.h"
#include "editor.h"
#include "public_editor.h"
#include "selection.h"
#include "time_axis_view.h"
#include "audio_time_axis.h"
#include "regionview.h"
#include "ardour_message.h"

#include <pbd/pthread_utils.h>
#include <ardour/types.h>
#include <ardour/export.h>
#include <ardour/audio_track.h>
#include <ardour/filesource.h>
#include <ardour/diskstream.h>
#include <ardour/audioregion.h>
#include <ardour/audioplaylist.h>

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace Gtk;

void
Editor::export_session()
{
      if (session) {
            export_range (0, session->current_end_frame());
      }
}

void
Editor::export_selection ()
{
      if (session) {
            if (selection->time.empty()) {
                  ArdourMessage message (this, X_("norange"), _("There is no range to export.\n\nSelect a range using the range mouse mode"));
                  return;
            }

            export_range (selection->time.front().start, 
                        selection->time.front().end);
      }
}

void
Editor::export_range (jack_nframes_t start, jack_nframes_t end)
{
      if (session) {
            if (export_dialog == 0) {
                  export_dialog = new ExportDialog (*this);
            }
            
            export_dialog->connect_to_session (session);
            export_dialog->set_range (start, end);
            export_dialog->start_export();
      }
}     

void
Editor::export_region ()
{
      if (clicked_regionview == 0) {
            return;
      }

      ExportDialog* dialog = new ExportDialog (*this, &clicked_regionview->region);
            
      dialog->connect_to_session (session);
      dialog->set_range (0, clicked_regionview->region.length());
      dialog->start_export();
}

void
Editor::write_a_region ()
{
      if (clicked_regionview == 0) {
            return;
      }

      FileSelection file_selector;

      file_selector.get_selection_entry()->activate.connect (bind (slot (*this, &Editor::finish_sub_event_loop), 1));
      file_selector.get_cancel_button()->clicked.connect (bind (slot (*this, &Editor::finish_sub_event_loop), -1));
      file_selector.get_ok_button()->clicked.connect (bind (slot (*this, &Editor::finish_sub_event_loop), 1));
      file_selector.delete_event.connect (bind (slot (*this, &Editor::finish_sub_event_loop_on_delete), -1));

      file_selector.show_all();

      run_sub_event_loop ();
      
      if (sub_event_loop_status == 1) {
            string path = file_selector.get_filename();
            printf ("got region: %s\n", path.c_str());
            if (path.length()) {
                  write_region (path, clicked_regionview->region);
            } 
      }
}

int
Editor::write_region_selection (AudioRegionSelection& regions)
{
      for (AudioRegionSelection::iterator i = regions.begin(); i != regions.end(); ++i) {
            if (write_region ("", (*i)->region) == false) {
                  return -1;
            }
      }
      return 0;
}

void
Editor::bounce_region_selection ()
{
      for (AudioRegionSelection::iterator i = selection->audio_regions.begin(); i != selection->audio_regions.end(); ++i) {
            
            AudioRegion& region ((*i)->region);
            AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(&(*i)->get_time_axis_view());
            AudioTrack* track = dynamic_cast<AudioTrack*>(&(atv->route()));

            InterThreadInfo itt;

            itt.done = false;
            itt.cancel = false;
            itt.progress = 0.0f;

            track->bounce_range (region.position(), region.position() + region.length(), itt);
      }
}

bool
Editor::write_region (string path, AudioRegion& region)
{
      FileSource* fs;
      const jack_nframes_t chunk_size = 4096;
      jack_nframes_t to_read;
      Sample buf[chunk_size];
      gain_t gain_buffer[chunk_size];
      jack_nframes_t pos;
      char s[PATH_MAX+1];
      uint32_t cnt;
      vector<FileSource *> sources;
      uint32_t nchans;
      
      nchans = region.n_channels();
      
      /* don't do duplicate of the entire source if that's what is going on here */

      if (region.start() == 0 && region.length() == region.source().length()) {
            /* XXX should link(2) to create a new inode with "path" */
            return true;
      }

      if (path.length() == 0) {

            for (uint32_t n=0; n < nchans; ++n) {
                  
                  for (cnt = 0; cnt < 999999; ++cnt) {
                        if (nchans == 1) {
                              snprintf (s, sizeof(s), "%s/%s_%" PRIu32 ".wav", session->sound_dir().c_str(),
                                      legalize_for_path(region.name()).c_str(), cnt);
                        }
                        else {
                              snprintf (s, sizeof(s), "%s/%s_%" PRIu32 "-%" PRId32 ".wav", session->sound_dir().c_str(),
                                      legalize_for_path(region.name()).c_str(), cnt, n);
                        }

                        path = s;
                        
                        if (::access (path.c_str(), F_OK) != 0) {
                              break;
                        }
                  }
                  
                  if (cnt == 999999) {
                        error << "" << endmsg;
                        goto error_out;
                  }
                  
            
                  
                  try {
                        fs = new FileSource (path, session->frame_rate());
                  }
                  
                  catch (failed_constructor& err) {
                        goto error_out;
                  }

                  sources.push_back (fs);
            }
      }
      else {
            /* TODO: make filesources based on passed path */

      }
      
      to_read = region.length();
      pos = region.position();

      while (to_read) {
            jack_nframes_t this_time;

            this_time = min (to_read, chunk_size);

            for (vector<FileSource *>::iterator src=sources.begin(); src != sources.end(); ++src) {

                  fs = (*src);
                  
                  if (region.read_at (buf, buf, gain_buffer, pos, this_time) != this_time) {
                        break;
                  }
                  
                  if (fs->write (buf, this_time) != this_time) {
                        error << "" << endmsg;
                        goto error_out;
                  }
            }

            to_read -= this_time;
            pos += this_time;
      }

      time_t tnow;
      struct tm* now;
      time (&tnow);
      now = localtime (&tnow);
      
      for (vector<FileSource *>::iterator src = sources.begin(); src != sources.end(); ++src) {
            (*src)->update_header (0, *now, tnow);
      }

      return true;

error_out:

      for (vector<FileSource*>::iterator i = sources.begin(); i != sources.end(); ++i) {
            (*i)->mark_for_remove ();
            delete (*i);
      }

      return 0;
}

int
Editor::write_audio_selection (TimeSelection& ts)
{
      int ret = 0;

      if (selection->tracks.empty()) {
            return 0;
      }

      for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {

            AudioTimeAxisView* atv;

            if ((atv = dynamic_cast<AudioTimeAxisView*>(*i)) == 0) {
                  continue;
            }

            if (atv->is_audio_track()) {

                  Playlist* playlist = atv->get_diskstream()->playlist();
                  
                  if (playlist && write_audio_range (*playlist, atv->get_diskstream()->n_channels(), ts) == 0) {
                        ret = -1;
                        break;
                  }
            }
      }

      return ret;
}

bool
Editor::write_audio_range (Playlist& playlist, uint32_t channels, list<AudioRange>& range)
{
      FileSource* fs;
      const jack_nframes_t chunk_size = 4096;
      jack_nframes_t nframes;
      Sample buf[chunk_size];
      gain_t gain_buffer[chunk_size];
      jack_nframes_t pos;
      char s[PATH_MAX+1];
      uint32_t cnt;
      string path;
      vector<FileSource *> sources;

      for (uint32_t n=0; n < channels; ++n) {
            
            for (cnt = 0; cnt < 999999; ++cnt) {
                  if (channels == 1) {
                        snprintf (s, sizeof(s), "%s/%s_%" PRIu32 ".wav", session->sound_dir().c_str(),
                                legalize_for_path(playlist.name()).c_str(), cnt);
                  }
                  else {
                        snprintf (s, sizeof(s), "%s/%s_%" PRIu32 "-%" PRId32 ".wav", session->sound_dir().c_str(),
                                legalize_for_path(playlist.name()).c_str(), cnt, n);
                  }
                  
                  if (::access (s, F_OK) != 0) {
                        break;
                  }
            }
            
            if (cnt == 999999) {
                  error << "" << endmsg;
                  goto error_out;
            }

            path = s;
            
            try {
                  fs = new FileSource (path, session->frame_rate());
            }
            
            catch (failed_constructor& err) {
                  goto error_out;
            }
            
            sources.push_back (fs);

      }
      

      for (list<AudioRange>::iterator i = range.begin(); i != range.end();) {
      
            nframes = (*i).length();
            pos = (*i).start;
            
            while (nframes) {
                  jack_nframes_t this_time;
                  
                  this_time = min (nframes, chunk_size);

                  for (uint32_t n=0; n < channels; ++n) {

                        fs = sources[n];
                        
                        if (playlist.read (buf, buf, gain_buffer, pos, this_time, n) != this_time) {
                              break;
                        }
                        
                        if (fs->write (buf, this_time) != this_time) {
                              goto error_out;
                        }
                  }
                  
                  nframes -= this_time;
                  pos += this_time;
            }
            
            list<AudioRange>::iterator tmp = i;
            ++tmp;

            if (tmp != range.end()) {
                  
                  /* fill gaps with silence */
                  
                  nframes = (*tmp).start - (*i).end;

                  while (nframes) {

                        jack_nframes_t this_time = min (nframes, chunk_size);
                        memset (buf, 0, sizeof (Sample) * this_time);

                        for (uint32_t n=0; n < channels; ++n) {

                              fs = sources[n];
                              if (fs->write (buf, this_time) != this_time) {
                                    goto error_out;
                              }
                        }

                        nframes -= this_time;
                  }
            }

            i = tmp;
      }

      time_t tnow;
      struct tm* now;
      time (&tnow);
      now = localtime (&tnow);

      for (uint32_t n=0; n < channels; ++n) {
            sources[n]->update_header (0, *now, tnow);
            // do we need to ref it again?
      }
      
      return true;

error_out:
      /* unref created files */

      for (vector<FileSource*>::iterator i = sources.begin(); i != sources.end(); ++i) {
            (*i)->mark_for_remove ();
            delete *i;
      }

      return false;
}

void
Editor::write_selection ()
{
      if (!selection->time.empty()) {
            write_audio_selection (selection->time);
      } else if (!selection->audio_regions.empty()) {
            write_region_selection (selection->audio_regions);
      }
}

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