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editor_audio_import.cc

/*
    Copyright (C) 2000-2006 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 <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <errno.h>
#include <unistd.h>

#include <sndfile.h>

#include <pbd/pthread_utils.h>
#include <pbd/basename.h>
#include <pbd/shortpath.h>

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

#include <ardour/session.h>
#include <ardour/audioplaylist.h>
#include <ardour/audioregion.h>
#include <ardour/audio_diskstream.h>
#include <ardour/utils.h>
#include <ardour/audio_track.h>
#include <ardour/audioplaylist.h>
#include <ardour/audiofilesource.h>
#include <ardour/region_factory.h>
#include <ardour/source_factory.h>
#include <pbd/memento_command.h>

#include "ardour_ui.h"
#include "editor.h"
#include "sfdb_ui.h"
#include "editing.h"
#include "audio_time_axis.h"
#include "utils.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace sigc;
using namespace Gtk;
using namespace Gtkmm2ext;
using namespace Editing;
using Glib::ustring;

/* Functions supporting the incorporation of external (non-captured) audio material into ardour */

void
Editor::add_external_audio_action (ImportMode mode_hint)
{
      if (session == 0) {
            MessageDialog msg (0, _("You can't import or embed an audiofile until you have a session loaded."));
            msg.run ();
            return;
      }
      
      if (sfbrowser == 0) {
            sfbrowser = new SoundFileOmega (*this, _("Add existing audio"), session, 0, true, mode_hint);
      } else {
            sfbrowser->set_mode (mode_hint);
      }

      external_audio_dialog ();
}

void
Editor::external_audio_dialog ()
{
      vector<Glib::ustring> paths;
      uint32_t track_cnt;

      if (session == 0) {
            MessageDialog msg (0, _("You can't import or embed an audiofile until you have a session loaded."));
            msg.run ();
            return;
      }
      
      track_cnt = 0;

      for (TrackSelection::iterator x = selection->tracks.begin(); x != selection->tracks.end(); ++x) {
            AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(*x);
            
            if (!atv) {
                  continue;
            } else if (atv->is_audio_track()) {
                  track_cnt++;
            }
      }

      if (sfbrowser == 0) {
            sfbrowser = new SoundFileOmega (*this, _("Add existing audio"), session, track_cnt, true);
      } else {
            sfbrowser->reset (track_cnt);
      }

      sfbrowser->show_all ();

  again:
      int response = sfbrowser->run ();

      switch (response) {
      case RESPONSE_APPLY:
            // leave the dialog open
            break;

      case RESPONSE_OK:
            sfbrowser->hide ();
            break;

      default:
            // cancel from the browser - we are done
            sfbrowser->hide ();
            return;
      }

      /* lets do it */
      
      paths = sfbrowser->get_paths ();

      ImportPosition pos = sfbrowser->get_position ();
      ImportMode mode = sfbrowser->get_mode ();
      ImportDisposition chns = sfbrowser->get_channel_disposition ();
      nframes64_t where;

      switch (pos) {
      case ImportAtEditPoint:
            where = get_preferred_edit_position ();
            break;
      case ImportAtTimestamp:
            where = -1;
            break;
      case ImportAtPlayhead:
            where = playhead_cursor->current_frame;
            break;
      case ImportAtStart:
            where = session->current_start_frame();
            break;
      }

      SrcQuality quality = sfbrowser->get_src_quality();

      if (sfbrowser->copy_files_btn.get_active()) {
            do_import (paths, chns, mode, quality, where);
      } else {
            do_embed (paths, chns, mode, where);
      }

      if (response == RESPONSE_APPLY) {
            sfbrowser->clear_selection ();
            goto again;
      }
}

boost::shared_ptr<AudioTrack>
Editor::get_nth_selected_audio_track (int nth) const
{
      AudioTimeAxisView* atv;
      TrackSelection::iterator x;
      
      for (x = selection->tracks.begin(); nth > 0 && x != selection->tracks.end(); ++x) {

            atv = dynamic_cast<AudioTimeAxisView*>(*x);
            
            if (!atv) {
                  continue;
            } else if (atv->is_audio_track()) {
                  --nth;
            }
      }
      
      if (x == selection->tracks.end()) {
            atv = dynamic_cast<AudioTimeAxisView*>(selection->tracks.back());
      } else {
            atv = dynamic_cast<AudioTimeAxisView*>(*x);
      }
      
      if (!atv || !atv->is_audio_track()) {
            return boost::shared_ptr<AudioTrack>();
      }
      
      return atv->audio_track();
}     

void
Editor::do_import (vector<ustring> paths, ImportDisposition chns, ImportMode mode, SrcQuality quality, nframes64_t& pos)
{
      boost::shared_ptr<AudioTrack> track;
      vector<ustring> to_import;
      bool ok = false;
      int nth = 0;

      if (interthread_progress_window == 0) {
            build_interthread_progress_window ();
      }

      switch (chns) {
      case Editing::ImportDistinctFiles:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_import.clear ();
                  to_import.push_back (*a);

                  if (mode == Editing::ImportToTrack) {
                        track = get_nth_selected_audio_track (nth++);
                  }
                  
                  if (import_sndfiles (to_import, mode, quality, pos, 1, -1, track)) {
                        goto out;
                  }

            }
            break;

      case Editing::ImportDistinctChannels:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_import.clear ();
                  to_import.push_back (*a);

                  if (import_sndfiles (to_import, mode, quality, pos, -1, -1, track)) {
                        goto out;
                  }

            }
            break;

      case Editing::ImportMergeFiles:
            /* create 1 region from all paths, add to 1 track,
               ignore "track"
            */
            if (import_sndfiles (paths, mode, quality, pos, 1, 1, track)) {
                  goto out;
            }
            break;

      case Editing::ImportSerializeFiles:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_import.clear ();
                  to_import.push_back (*a);
                  
                  /* create 1 region from this path, add to 1 track,
                     reuse "track" across paths
                  */

                  if (import_sndfiles (to_import, mode, quality, pos, 1, 1, track)) {
                        goto out;
                  }

            }
            break;
      }

      ok = true;
      
  out:      
      if (ok) {
            session->save_state ("");
      }

      interthread_progress_window->hide_all ();
}

bool
Editor::idle_do_embed (vector<ustring> paths, ImportDisposition chns, ImportMode mode, nframes64_t& pos)
{
      _do_embed (paths, chns, mode, pos);
      return false;
}

void
Editor::do_embed (vector<ustring> paths, ImportDisposition chns, ImportMode mode, nframes64_t& pos)
{
#ifdef GTKOSX
      Glib::signal_idle().connect (bind (mem_fun (*this, &Editor::idle_do_embed), paths, chns, mode, pos));
#else
      _do_embed (paths, chns, mode, pos);
#endif
}

void
Editor::_do_embed (vector<ustring> paths, ImportDisposition chns, ImportMode mode, nframes64_t& pos)
{
      boost::shared_ptr<AudioTrack> track;
      bool check_sample_rate = true;
      bool ok = false;
      vector<ustring> to_embed;
      bool multi = paths.size() > 1;
      int nth = 0;

      switch (chns) {
      case Editing::ImportDistinctFiles:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_embed.clear ();
                  to_embed.push_back (*a);

                  if (mode == Editing::ImportToTrack) {
                        track = get_nth_selected_audio_track (nth++);
                  }

                  if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, 1, -1, track) < -1) {
                        goto out;
                  }
            }
            break;
            
      case Editing::ImportDistinctChannels:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_embed.clear ();
                  to_embed.push_back (*a);

                  if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, -1, -1, track) < -1) {
                        goto out;
                  }
            }
            break;

      case Editing::ImportMergeFiles:
            if (embed_sndfiles (paths, multi, check_sample_rate, mode, pos, 1, 1, track) < -1) {
                  goto out;
            }
      break;

      case Editing::ImportSerializeFiles:
            for (vector<ustring>::iterator a = paths.begin(); a != paths.end(); ++a) {

                  to_embed.clear ();
                  to_embed.push_back (*a);

                  if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, 1, 1, track) < -1) {
                        goto out;
                  }
            }
            break;
      }

      ok = true;
      
  out:      
      if (ok) {
            session->save_state ("");
      }
}

int
Editor::import_sndfiles (vector<ustring> paths, ImportMode mode, SrcQuality quality, nframes64_t& pos, 
                   int target_regions, int target_tracks, boost::shared_ptr<AudioTrack>& track)
{
      WindowTitle title = string_compose (_("importing %1"), paths.front());

      interthread_progress_window->set_title (title.get_string());
      interthread_progress_window->set_position (Gtk::WIN_POS_MOUSE);
      interthread_progress_window->show_all ();
      interthread_progress_bar.set_fraction (0.0f);
      interthread_cancel_label.set_text (_("Cancel Import"));
      current_interthread_info = &import_status;

      import_status.paths = paths;
      import_status.done = false;
      import_status.cancel = false;
      import_status.freeze = false;
      import_status.done = 0.0;
      import_status.quality = quality;

      interthread_progress_connection = Glib::signal_timeout().connect 
            (bind (mem_fun(*this, &Editor::import_progress_timeout), (gpointer) 0), 100);
      
      track_canvas.get_window()->set_cursor (Gdk::Cursor (Gdk::WATCH));
      ARDOUR_UI::instance()->flush_pending ();

      /* start import thread for this spec. this will ultimately call Session::import_audiofile()
         and if successful will add the file(s) as a region to the session region list.
      */
      
      pthread_create_and_store ("import", &import_status.thread, 0, _import_thread, this);
      pthread_detach (import_status.thread);
      
      while (!(import_status.done || import_status.cancel)) {
            gtk_main_iteration ();
      }

      interthread_progress_window->hide ();
      
      import_status.done = true;
      interthread_progress_connection.disconnect ();
      
      /* import thread finished - see if we should build a new track */

      boost::shared_ptr<AudioRegion> r;
      
      if (import_status.cancel || import_status.sources.empty()) {
            goto out;
      }

      if (add_sources (paths, import_status.sources, pos, mode, target_regions, target_tracks, track, false) == 0) {
            session->save_state ("");
      }

  out:
      track_canvas.get_window()->set_cursor (*current_canvas_cursor);
      return 0;
}

int
Editor::embed_sndfiles (vector<Glib::ustring> paths, bool multifile,
                  bool& check_sample_rate, ImportMode mode, nframes64_t& pos, int target_regions, int target_tracks,
                  boost::shared_ptr<AudioTrack>& track)
{
      boost::shared_ptr<AudioFileSource> source;
      SourceList sources;
      string linked_path;
      SoundFileInfo finfo;
      int ret = 0;

      track_canvas.get_window()->set_cursor (Gdk::Cursor (Gdk::WATCH));
      ARDOUR_UI::instance()->flush_pending ();

      for (vector<Glib::ustring>::iterator p = paths.begin(); p != paths.end(); ++p) {

            ustring path = *p;

            /* lets see if we can link it into the session */
            
            linked_path = session->sound_dir();
            linked_path += '/';
            linked_path += Glib::path_get_basename (path);
            
            if (link (path.c_str(), linked_path.c_str()) == 0) {

                  /* there are many reasons why link(2) might have failed.
                     but if it succeeds, we now have a link in the
                     session sound dir that will protect against
                     unlinking of the original path. nice.
                  */
                  
                  path = linked_path;

            } else {

                  /* one possible reason is that its already linked */

                  if (errno == EEXIST) {
                        struct stat sb;

                        if (stat (linked_path.c_str(), &sb) == 0) {
                              if (sb.st_nlink > 1) { // its a hard link, assume its the one we want
                                    path = linked_path;
                              }
                        }
                  }
            }
            
            /* note that we temporarily truncated _id at the colon */
            
            string error_msg;

            if (!AudioFileSource::get_soundfile_info (path, finfo, error_msg)) {
                  error << string_compose(_("Editor: cannot open file \"%1\", (%2)"), path, error_msg ) << endmsg;
                  goto out;
            }
            
            if (check_sample_rate  && (finfo.samplerate != (int) session->frame_rate())) {
                  vector<string> choices;
                  
                  if (multifile) {
                        choices.push_back (_("Cancel entire import"));
                        choices.push_back (_("Don't embed it"));
                        choices.push_back (_("Embed all without questions"));
                  
                        Gtkmm2ext::Choice rate_choice (
                              string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"), 
                                          short_path (path, 40)),
                              choices, false);
                        
                        int resx = rate_choice.run ();
                        
                        switch (resx) {
                        case 0: /* stop a multi-file import */
                              ret = -2;
                              goto out;
                        case 1: /* don't embed this one */
                              ret = -1;
                              goto out;
                        case 2: /* do it, and the rest without asking */
                              check_sample_rate = false;
                              break;
                        case 3: /* do it */
                              break;
                        default:
                              ret = -2;
                              goto out;
                        }
                  } else {
                        choices.push_back (_("Cancel"));
                        choices.push_back (_("Embed it anyway"));
                  
                        Gtkmm2ext::Choice rate_choice (
                              string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"), path),
                              choices, false);
                        
                        int resx = rate_choice.run ();
                        
                        switch (resx) {
                        case 0: /* don't import */
                              ret = -1;
                              goto out;
                        case 1: /* do it */
                              break;
                        default:
                              ret = -2;
                              goto out;
                        }
                  }
            }
            
            track_canvas.get_window()->set_cursor (Gdk::Cursor (Gdk::WATCH));

            for (int n = 0; n < finfo.channels; ++n) {
                  try {

                        /* check if we have this thing embedded already */

                        boost::shared_ptr<Source> s;

                        if ((s = session->source_by_path_and_channel (path, n)) == 0) {
                              source = boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createReadable 
                                                                         (*session, path,  n,
                                                                        (mode == ImportAsTapeTrack ? 
                                                                         AudioFileSource::Destructive : 
                                                                         AudioFileSource::Flag (0)),
                                                                        true, true));
                        } else {
                              source = boost::dynamic_pointer_cast<AudioFileSource> (s);
                        }

                        sources.push_back(source);
                  } 
                  
                  catch (failed_constructor& err) {
                        error << string_compose(_("could not open %1"), path) << endmsg;
                        goto out;
                  }
                  
                  ARDOUR_UI::instance()->flush_pending ();
            }
      }

      if (sources.empty()) {
            goto out;
      }

      ret = add_sources (paths, sources, pos, mode, target_regions, target_tracks, track, true);

  out:
      track_canvas.get_window()->set_cursor (*current_canvas_cursor);
      return ret;
}

int
Editor::add_sources (vector<Glib::ustring> paths, SourceList& sources, nframes64_t& pos, ImportMode mode, 
                 int target_regions, int target_tracks, boost::shared_ptr<AudioTrack>& track, bool add_channel_suffix)
{
      vector<boost::shared_ptr<AudioRegion> > regions;
      ustring region_name;
      uint32_t input_chan = 0;
      uint32_t output_chan = 0;

      if (pos == -1) { // "use timestamp"
            if (sources[0]->natural_position() != 0) {
                  pos = sources[0]->natural_position();
            } else {
                  pos = get_preferred_edit_position ();
            }
      }

      if (target_regions == 1) {

            /* take all the sources we have and package them up as a region */

            region_name = region_name_from_path (paths.front(), (sources.size() > 1), false);
            
            regions.push_back (boost::dynamic_pointer_cast<AudioRegion> 
                           (RegionFactory::create (sources, 0, sources[0]->length(), region_name, 0,
                                             Region::Flag (Region::DefaultFlags|Region::WholeFile|Region::External))));
            
      } else if (target_regions == -1) {

            /* take each source and create a region for each one */

            SourceList just_one;
            SourceList::iterator x;
            uint32_t n;

            for (n = 0, x = sources.begin(); x != sources.end(); ++x, ++n) {

                  just_one.clear ();
                  just_one.push_back (*x);
                  
                  boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (*x);

                  region_name = region_name_from_path (afs->path(), false, true, sources.size(), n);

                  regions.push_back (boost::dynamic_pointer_cast<AudioRegion> 
                                 (RegionFactory::create (just_one, 0, (*x)->length(), region_name, 0,
                                                   Region::Flag (Region::DefaultFlags|Region::WholeFile|Region::External))));

            }
      }

      if (target_regions == 1) {
            input_chan = regions.front()->n_channels();
      } else {
            if (target_tracks == 1) {
                  input_chan = regions.size();
            } else {
                  input_chan = 1;
            }
      }

      if (Config->get_output_auto_connect() & AutoConnectMaster) {
            output_chan = (session->master_out() ? session->master_out()->n_inputs() : input_chan);
      } else {
            output_chan = input_chan;
      }

      int n = 0;

      for (vector<boost::shared_ptr<AudioRegion> >::iterator r = regions.begin(); r != regions.end(); ++r, ++n) {

            finish_bringing_in_audio (*r, input_chan, output_chan, pos, mode, track);

            if (target_tracks != 1) {
                  track.reset ();
            } else {
                  pos += (*r)->length();
            } 
      }

      /* setup peak file building in another thread */

      for (SourceList::iterator x = sources.begin(); x != sources.end(); ++x) {
            SourceFactory::setup_peakfile (*x, true);
      }

      return 0;
}
      
int
Editor::finish_bringing_in_audio (boost::shared_ptr<AudioRegion> region, uint32_t in_chans, uint32_t out_chans, nframes64_t& pos, 
                          ImportMode mode, boost::shared_ptr<AudioTrack>& existing_track)
{
      switch (mode) {
      case ImportAsRegion:
            /* relax, its been done */
            break;
            
      case ImportToTrack:
      {
            if (!existing_track) {

                  existing_track = get_nth_selected_audio_track (0);

                  if (!existing_track) {
                        return -1;
                  }
            }

            boost::shared_ptr<Playlist> playlist = existing_track->diskstream()->playlist();
            boost::shared_ptr<AudioRegion> copy (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
            begin_reversible_command (_("insert sndfile"));
            XMLNode &before = playlist->get_state();
            playlist->add_region (copy, pos);
            session->add_command (new MementoCommand<Playlist>(*playlist, &before, &playlist->get_state()));
            commit_reversible_command ();
            break;
      }

      case ImportAsTrack:
      { 
            if (!existing_track) {
                  list<boost::shared_ptr<AudioTrack> > at (session->new_audio_track (in_chans, out_chans, Normal, 1));

                  if (at.empty()) {
                        return -1;
                  }

                  existing_track = at.front();
                  existing_track->set_name (region->name(), this);
            }

            boost::shared_ptr<AudioRegion> copy (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
            existing_track->diskstream()->playlist()->add_region (copy, pos);
            break;
      }


      case ImportAsTapeTrack:
      {
            list<boost::shared_ptr<AudioTrack> > at (session->new_audio_track (in_chans, out_chans, Destructive));
            if (!at.empty()) {
                  boost::shared_ptr<AudioRegion> copy (boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (region)));
                  at.front()->set_name (basename_nosuffix (copy->name()), this);
                  at.front()->diskstream()->playlist()->add_region (copy, pos);
            }
            break;
      }
      }

      return 0;
}

void *
Editor::_import_thread (void *arg)
{
      PBD::ThreadCreated (pthread_self(), X_("Import"));

      Editor *ed = (Editor *) arg;
      return ed->import_thread ();
}

void *
Editor::import_thread ()
{
      session->import_audiofiles (import_status);
      pthread_exit_pbd (0);
      /*NOTREACHED*/
      return 0;
}

gint
Editor::import_progress_timeout (void *arg)
{
      interthread_progress_label.set_text (import_status.doing_what);

      if (import_status.freeze) {
            interthread_cancel_button.set_sensitive(false);
      } else {
            interthread_cancel_button.set_sensitive(true);
      }

      if (import_status.doing_what == "building peak files") {
            interthread_progress_bar.pulse ();
            return FALSE;
      } else {
            interthread_progress_bar.set_fraction (import_status.progress);
      }

      return !(import_status.done || import_status.cancel);
}


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