/*
 * Copyright (C) 2005-2006 Taybin Rutkin <taybin@taybin.com>
 * Copyright (C) 2006-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2006-2018 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2006 Doug McLain <doug@nostar.net>
 * Copyright (C) 2006 Nick Mainsbridge <mainsbridge@gmail.com>
 * Copyright (C) 2007-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2012-2017 Tim Mayberry <mojofunk@gmail.com>
 * Copyright (C) 2012-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2013-2015 John Emmas <john@creativepost.co.uk>
 * Copyright (C) 2013 Colin Fletcher <colin.m.fletcher@googlemail.com>
 * Copyright (C) 2019-2018 Ben Loftis <ben@harrisonconsoles.com>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifdef WAF_BUILD
#include "gtk2ardour-config.h"
#endif

#ifdef PLATFORM_WINDOWS
#include <windows.h>
#endif

#include <map>
#include <cerrno>
#include <sstream>

#include <unistd.h>
#include <limits.h>

#include <glib.h>
#include "pbd/gstdio_compat.h"
#include <glibmm/fileutils.h>

#include <gtkmm/box.h>
#include <gtkmm/scrolledwindow.h>
#include <gtkmm/stock.h>

#include "ardour/debug.h"

#include "pbd/convert.h"
#include "pbd/tokenizer.h"
#include "pbd/enumwriter.h"
#include "pbd/file_utils.h"
#include "pbd/natsort.h"
#include "pbd/pthread_utils.h"
#include "pbd/string_convert.h"
#include "pbd/xml++.h"

#include <gtkmm2ext/utils.h>

#include "evoral/SMF.h"

#include "ardour/audio_library.h"
#include "ardour/auditioner.h"
#include "ardour/audioregion.h"
#include "ardour/audiofilesource.h"
#include "ardour/midi_region.h"
#include "ardour/smf_source.h"
#include "ardour/region_factory.h"
#include "ardour/source_factory.h"
#include "ardour/session.h"
#include "ardour/session_directory.h"
#include "ardour/srcfilesource.h"
#include "ardour/profile.h"

#include "ardour_ui.h"
#include "editing.h"
#include "gui_thread.h"
#include "sfdb_ui.h"
#include "editing.h"
#include "gain_meter.h"
#include "main_clock.h"
#include "public_editor.h"
#include "timers.h"
#include "ui_config.h"

#include "sfdb_freesound_mootcher.h"

#include "pbd/i18n.h"

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

using std::string;

string SoundFileBrowser::persistent_folder;
typedef TreeView::Selection::ListHandle_Path ListPath;

static MidiTrackNameSource
string2miditracknamesource (string const & str)
{
	if (str == _("by track number")) {
		return SMFTrackNumber;
	} else if (str == _("by track name")) {
		return SMFTrackName;
	} else if (str == _("by file and track name")) {
		return SMFFileAndTrackName;
	} else if (str == _("by instrument name")) {
		return SMFInstrumentName;
	}

	warning << string_compose (_("programming error: unknown midi track name source string %1"), str) << endmsg;

	return SMFTrackNumber;
}

static ImportMode
string2importmode (string const & str)
{
	if (str == _("as new tracks")) {
		return ImportAsTrack;
	} else if (str == _("to selected tracks")) {
		return ImportToTrack;
	} else if (str == _("to source list")) {
		return ImportAsRegion;
	}

	warning << string_compose (_("programming error: unknown import mode string %1"), str) << endmsg;

	return ImportAsTrack;
}

static string
importmode2string (ImportMode mode)
{
	switch (mode) {
	case ImportAsTrack:
		return _("as new tracks");
	case ImportToTrack:
		return _("to selected tracks");
	case ImportAsRegion:
		return _("to source list");
	case ImportAsTrigger:
		/* TODO: n/a */
		break;
	}
	abort(); /*NOTREACHED*/
	return _("as new tracks");
}

SoundFileBox::SoundFileBox (bool /*persistent*/)
	: table (7, 2),
	  length_clock ("sfboxLengthClock", true, "", false, false, true, false),
	  timecode_clock ("sfboxTimecodeClock", true, "", false, false, false, false),
	  main_box (false, 6),
	  autoplay_btn (_("Auto-play")),
	  seek_slider(0,1000,1),
	  _seeking(false),
	  _src_quality (SrcBest),
	  _import_position (ImportAtTimestamp)

{
	set_name (X_("SoundFileBox"));

	preview_label.set_markup (_("<b>Sound File Information</b>"));

	border_frame.set_label_widget (preview_label);
	border_frame.add (main_box);

	pack_start (border_frame, true, true);
	set_border_width (6);

	main_box.set_border_width (6);

	length.set_text (_("Length:"));
	length.set_alignment (1, 0.5);
	timecode.set_text (_("Timestamp:"));
	timecode.set_alignment (1, 0.5);
	format.set_text (_("Format:"));
	format.set_alignment (1, 0.5);
	channels.set_text (_("Channels:"));
	channels.set_alignment (1, 0.5);
	samplerate.set_text (_("Sample Rate:"));
	samplerate.set_alignment (1, 0.5);
	tempomap.set_text (_("Tempo Map:"));
	tempomap.set_alignment (1, 0.5);

        preview_label.set_max_width_chars (50);
	preview_label.set_ellipsize (Pango::ELLIPSIZE_END);

	format_text.set_max_width_chars (20);
	format_text.set_ellipsize (Pango::ELLIPSIZE_END);
	format_text.set_alignment (0, 1);

	table.set_col_spacings (6);
	table.set_homogeneous (false);
	table.set_row_spacings (6);

	int row = 0;
	table.attach (format,     0, 1, row, row+2, FILL, FILL);  row+=2;
	table.attach (channels,   0, 1, row, row+1, FILL, FILL);  row+=1;
	table.attach (samplerate, 0, 1, row, row+1, FILL, FILL);  row+=1;
	table.attach (length,     0, 1, row, row+1, FILL, FILL);  row+=1;
	table.attach (timecode,   0, 1, row, row+1, FILL, FILL);  row+=1;
	table.attach (tempomap,   0, 1, row, row+1, FILL, FILL);

	row = 0;
	table.attach (format_text,     1, 2, row, row+2, FILL, FILL);  row+=2;
	table.attach (channels_value,  1, 2, row, row+1, FILL, FILL);  row+=1;
	table.attach (samplerate_value,1, 2, row, row+1, FILL, FILL);  row+=1;
	table.attach (length_clock,    1, 2, row, row+1, FILL, FILL);  row+=1;
	table.attach (timecode_clock,  1, 2, row, row+1, FILL, FILL);  row+=1;
	table.attach (tempomap_value,  1, 2, row, row+1, FILL, FILL);  row+=1;

	length_clock.set_mode (ARDOUR_UI::instance()->primary_clock->mode());
	timecode_clock.set_mode (AudioClock::Timecode);

	main_box.pack_start (table, false, false);

	tags_entry.set_editable (true);
	tags_entry.set_wrap_mode(Gtk::WRAP_WORD);
	tags_entry.signal_focus_out_event().connect (sigc::mem_fun (*this, &SoundFileBox::tags_entry_left));

	Label* label = manage (new Label (_("Tags:")));
	label->set_alignment (0.0f, 0.5f);
	main_box.pack_start (*label, false, false);
	main_box.pack_start (tags_entry, true, true);

	main_box.pack_start (bottom_box, false, false);

	play_btn.set_image (*(manage (new Image (Stock::MEDIA_PLAY, ICON_SIZE_BUTTON))));
//	play_btn.set_label (_("Play"));

	stop_btn.set_image (*(manage (new Image (Stock::MEDIA_STOP, ICON_SIZE_BUTTON))));
//	stop_btn.set_label (_("Stop"));

	bottom_box.set_homogeneous (false);
	bottom_box.set_spacing (6);
	bottom_box.pack_start(play_btn, true, true);
	bottom_box.pack_start(stop_btn, true, true);
	bottom_box.pack_start(autoplay_btn, false, false);

	seek_slider.set_draw_value(false);

	seek_slider.add_events(Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
	seek_slider.signal_button_press_event().connect(sigc::mem_fun(*this, &SoundFileBox::seek_button_press), false);
	seek_slider.signal_button_release_event().connect(sigc::mem_fun(*this, &SoundFileBox::seek_button_release), false);
	main_box.pack_start (seek_slider, false, false);

	play_btn.signal_clicked().connect (sigc::mem_fun (*this, &SoundFileBox::audition));
	stop_btn.signal_clicked().connect (sigc::mem_fun (*this, &SoundFileBox::stop_audition));

	update_autoplay ();
	autoplay_btn.signal_toggled().connect(sigc::mem_fun (*this, &SoundFileBox::autoplay_toggled));

	stop_btn.set_sensitive (false);

	channels_value.set_alignment (0.0f, 0.5f);
	samplerate_value.set_alignment (0.0f, 0.5f);
}

void
SoundFileBox::on_size_request (Gtk::Requisition* req)
{
	VBox::on_size_request (req);
	req->width = std::max<gint> (req->width, 300 * UIConfiguration::instance().get_ui_scale ());
}

void
SoundFileBox::set_session(Session* s)
{
	SessionHandlePtr::set_session (s);

	if (!_session) {
		play_btn.set_sensitive (false);
		stop_btn.set_sensitive (false);
		auditioner_connections.drop_connections();
	} else {
		length_clock.set_session (s);
		timecode_clock.set_session (s);
		auditioner_connections.drop_connections();
		if (_session->the_auditioner()) {
			_session->AuditionActive.connect(auditioner_connections, invalidator (*this), std::bind (&SoundFileBox::audition_active, this, _1), gui_context());
			_session->the_auditioner()->AuditionProgress.connect(auditioner_connections, invalidator (*this), std::bind (&SoundFileBox::audition_progress, this, _1, _2), gui_context());
		}
	}
}

void
SoundFileBox::audition_active(bool active) {
	stop_btn.set_sensitive (active);
	seek_slider.set_sensitive (active);
	if (!active) {
		seek_slider.set_value(0);
		_seeking = false;
	}
}

void
SoundFileBox::audition_progress(ARDOUR::samplecnt_t pos, ARDOUR::samplecnt_t len) {
	if (!_seeking) {
		seek_slider.set_value( 1000.0 * pos / len);
		seek_slider.set_sensitive (true);
	}
}

bool
SoundFileBox::seek_button_press (GdkEventButton*)
{
	_seeking = true;
	return false; // pass on to slider
}

bool
SoundFileBox::seek_button_release (GdkEventButton*)
{
	_seeking = false;
	if (_session->the_auditioner()) {
		_session->the_auditioner()->seek_to_percent(seek_slider.get_value() / 10.0);
	}
	seek_slider.set_sensitive (false);
	return false; // pass on to slider
}

bool
SoundFileBox::setup_labels (const string& filename)
{
	if (!path.empty()) {
		// save existing tags
		tags_changed ();
	}

	path = filename;

	string error_msg;

	if (SMFSource::valid_midi_file (path)) {

		bool err = false;
		Evoral::SMF smf;
		if (smf.open (path)) {
			error << string_compose(_("Could not read file: %1."), path) << endmsg;
			err = true;
		}

		preview_label.set_markup (_("<b>MIDI File Information</b>"));

		samplerate_value.set_text ("-");
		samplerate_value.set_name ("NewSessionSR2Label");
		samplerate.set_text (_("Sample Rate:"));
		samplerate.set_name ("NewSessionSR2Label");
		tags_entry.get_buffer()->set_text ("");
		timecode_clock.set (timepos_t ());
		length_clock.set_duration (timecnt_t (0));
		tags_entry.set_sensitive (false);

		if (!err) {
			if (smf.smf_format()==0) {
				format_text.set_text ("MIDI Type 0");
			} else {
				format_text.set_text (string_compose("%1 (%2 Tracks)", smf.smf_format()==2 ? "MIDI Type 2" : "MIDI Type 1", smf.num_tracks()));
			}
			channels_value.set_text (ARDOUR_UI_UTILS::midi_channels_as_string (smf.used_channels()));
			switch (smf.num_tempos()) {
			case 0:
				tempomap_value.set_text (_("No tempo data"));
				break;
			case 1: {
				Evoral::SMF::Tempo* t = smf.nth_tempo (0);
				assert (t);
				tempomap_value.set_text (string_compose (_(u8"%1/%2 \u2669 = %3"),
				                                         t->numerator,
				                                         t->denominator,
				                                         t->tempo ()));
				break;
			}
			default:
				tempomap_value.set_text (string_compose (_("map with %1 sections"),
				                                         smf.num_tempos()));
				break;
			}
		} else {
			channels_value.set_text ("");
			tempomap_value.set_text (_("No tempo data"));
		}

		if (_session && !err) {
			play_btn.set_sensitive (true);
		} else {
			play_btn.set_sensitive (false);
		}

		return true;
	}

	if(!AudioFileSource::get_soundfile_info (filename, sf_info, error_msg)) {

		preview_label.set_markup (_("<b>File Information</b>"));
		format_text.set_text ("");
		channels_value.set_text ("");
		samplerate_value.set_text ("");
		tags_entry.get_buffer()->set_text ("");

		length_clock.set_duration (timecnt_t());
		timecode_clock.set (timepos_t());

		tags_entry.set_sensitive (false);
		play_btn.set_sensitive (false);

		return false;
	}

	try {

		preview_label.set_markup (string_compose ("<b>%1</b>", Glib::Markup::escape_text (Glib::path_get_basename (filename))));

	} catch (Glib::ConvertError& err) {

		error << string_compose (_("Could not use confusing filename [%1] (%2)"), filename, err.what()) << endmsg;

		preview_label.set_markup (_("<b>Sound File Information</b>"));
		format_text.set_text ("");
		channels_value.set_text ("");
		samplerate_value.set_text ("");
		tags_entry.get_buffer()->set_text ("");

		length_clock.set_duration (timecnt_t());
		timecode_clock.set (timepos_t());

		tags_entry.set_sensitive (false);
		play_btn.set_sensitive (false);

		return false;
	}

	std::string n = sf_info.format_name;
	if (n.substr (0, 8) == X_("Format: ")) {
		n = n.substr (8);
	}
	format_text.set_text (n);
	channels_value.set_text (to_string (sf_info.channels));

	if (_session && sf_info.samplerate != _session->sample_rate()) {
		samplerate.set_markup (string_compose ("<b>%1</b>", _("Sample Rate:")));
		samplerate_value.set_markup (string_compose (X_("<b>%1 Hz</b>"), sf_info.samplerate));
		samplerate_value.set_name ("NewSessionSR1Label");
		samplerate.set_name ("NewSessionSR1Label");
	} else {
		samplerate.set_text (_("Sample Rate:"));
		samplerate_value.set_text (string_compose (X_("%1 Hz"), sf_info.samplerate));
		samplerate_value.set_name ("NewSessionSR2Label");
		samplerate.set_name ("NewSessionSR2Label");
	}

	samplecnt_t const nfr = _session ? _session->nominal_sample_rate() : 25;
	double src_coef = (double) nfr / sf_info.samplerate;

	length_clock.set_duration (timecnt_t (samplecnt_t (llrint (sf_info.length * src_coef + 0.5))), true);
	timecode_clock.set (timepos_t (samplepos_t (llrint (sf_info.timecode * src_coef + 0.5))), true);

	// this is a hack that is fixed in trunk, i think (august 26th, 2007)

	vector<string> tags = Library->get_tags (string ("//") + filename);

	stringstream tag_string;
	for (vector<string>::iterator i = tags.begin(); i != tags.end(); ++i) {
		if (i != tags.begin()) {
			tag_string << ", ";
		}
		tag_string << *i;
	}
	tags_entry.get_buffer()->set_text (tag_string.str());

	tags_entry.set_sensitive (true);
	if (_session) {
		play_btn.set_sensitive (true);
	}

	return true;
}

void
SoundFileBox::update_autoplay ()
{
	const bool config_autoplay = UIConfiguration::instance().get_autoplay_files();

	if (autoplay_btn.get_active() != config_autoplay) {
		autoplay_btn.set_active (config_autoplay);
	}
}

void
SoundFileBox::autoplay_toggled()
{
	UIConfiguration::instance().set_autoplay_files(autoplay_btn.get_active());
}

bool
SoundFileBox::autoplay() const
{
	return autoplay_btn.get_active();
}

bool
SoundFileBox::audition_oneshot()
{
	audition ();
	return false;
}

void
SoundFileBox::audition ()
{
	if (!_session) {
		return;
	}

	_session->cancel_audition();

	if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
		warning << string_compose(_("Could not read file: %1 (%2)."), path, strerror(errno)) << endmsg;
		return;
	}

	std::shared_ptr<Region> r;

	if (SMFSource::valid_midi_file (path)) {

		std::shared_ptr<SMFSource> ms =
			std::dynamic_pointer_cast<SMFSource> (
					SourceFactory::createExternal (DataType::MIDI, *_session,
											 path, 0, Source::Flag (0), false));

		string rname = region_name_from_path (ms->path(), false);

		PropertyList plist;

		plist.add (ARDOUR::Properties::start, timepos_t (Temporal::Beats()));
		plist.add (ARDOUR::Properties::length, ms->length());
		plist.add (ARDOUR::Properties::name, rname);
		plist.add (ARDOUR::Properties::layer, 0);

		r = std::dynamic_pointer_cast<MidiRegion> (RegionFactory::create (std::dynamic_pointer_cast<Source>(ms), plist, false));
		assert(r);

	} else {

		SourceList srclist;
		std::shared_ptr<AudioFileSource> afs;
		bool old_sbp = AudioSource::get_build_peakfiles ();

		/* don't even think of building peakfiles for these files */

		AudioSource::set_build_peakfiles (false);

		for (int n = 0; n < sf_info.channels; ++n) {
			try {
				afs = std::dynamic_pointer_cast<AudioFileSource> (
					SourceFactory::createExternal (DataType::AUDIO, *_session,
											 path, n,
											 Source::Flag (ARDOUR::AudioFileSource::NoPeakFile), false));
				if (afs->sample_rate() != _session->nominal_sample_rate()) {
					std::shared_ptr<SrcFileSource> sfs (new SrcFileSource(*_session, afs, _src_quality));
					srclist.push_back(sfs);
				} else {
					srclist.push_back(afs);
				}

			} catch (failed_constructor& err) {
				error << _("Could not access soundfile: ") << path << endmsg;
				AudioSource::set_build_peakfiles (old_sbp);
				return;
			}
		}

		AudioSource::set_build_peakfiles (old_sbp);

		if (srclist.empty()) {
			return;
		}

		afs = std::dynamic_pointer_cast<AudioFileSource> (srclist[0]);
		string rname = region_name_from_path (afs->path(), false);

		PropertyList plist;

		plist.add (ARDOUR::Properties::start, timepos_t (0));
		plist.add (ARDOUR::Properties::length, srclist[0]->length());
		plist.add (ARDOUR::Properties::name, rname);
		plist.add (ARDOUR::Properties::layer, 0);

		r = std::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (srclist, plist, false));
	}

	timepos_t audition_position;

	switch (_import_position) {
		case ImportAtTimestamp:
			break;
		case ImportAtPlayhead:
			audition_position = timepos_t (_session->transport_sample());
			break;
		case ImportAtStart:
			audition_position = timepos_t (_session->current_start_sample());
			break;
		case ImportAtEditPoint:
			audition_position = PublicEditor::instance().get_preferred_edit_position ();
			break;
	}

	r->set_position(audition_position);

	_session->audition_region(r);
}

void
SoundFileBox::stop_audition ()
{
	if (_session) {
		_session->cancel_audition();
	}
}

bool
SoundFileBox::tags_entry_left (GdkEventFocus *)
{
	tags_changed ();
	return false;
}

void
SoundFileBox::tags_changed ()
{
	string tag_string = tags_entry.get_buffer()->get_text ();

	if (tag_string.empty()) {
		return;
	}

	vector<string> tags;

	if (!PBD::tokenize (tag_string, string(",\n"), std::back_inserter (tags), true)) {
		warning << _("SoundFileBox: Could not tokenize string: ") << tag_string << endmsg;
		return;
	}

	save_tags (tags);
}

void
SoundFileBox::save_tags (const vector<string>& tags)
{
	Library->set_tags (string ("//") + path, tags);
	Library->save_changes ();
}

SoundFileBrowser::SoundFileBrowser (string title, ARDOUR::Session* s, bool persistent)
	: ArdourWindow (title)
	, found_list (ListStore::create(found_list_columns))
	, freesound_list (ListStore::create(freesound_list_columns))
	, chooser (FILE_CHOOSER_ACTION_OPEN)
	, preview (persistent)
	, found_search_btn (_("Search"))
	, found_list_view (found_list)
	, freesound_search_btn (_("Search"))
	, freesound_list_view (freesound_list)
	, resetting_ourselves (false)
	, matches (0)
	, _status (0)
	, _done (false)
	, import_button (_("Import"))
	, gm (0)
{

#ifdef __APPLE__
	try {
		/* add_shortcut_folder throws an exception if the folder being added already has a shortcut */
		chooser.add_shortcut_folder_uri("file:///Library/GarageBand/Apple Loops");
		chooser.add_shortcut_folder_uri("file:///Library/Audio/Apple Loops");
		chooser.add_shortcut_folder_uri("file:///Library/Application Support/GarageBand/Instrument Library/Sampler/Sampler Files");
	}
	catch (Glib::Error & e) {
		std::cerr << "sfdb.add_shortcut_folder() threw Glib::Error " << e.what() << std::endl;
	}
#endif
	Gtkmm2ext::add_volume_shortcuts (chooser);

	//add the file chooser

	chooser.set_border_width (12);

	audio_filter.add_custom (FILE_FILTER_FILENAME, sigc::mem_fun(*this, &SoundFileBrowser::on_audio_filter));
	audio_filter.set_name (_("Audio files"));
	chooser.add_filter (audio_filter);

#ifndef LIVETRAX
	audio_and_midi_filter.add_custom (FILE_FILTER_FILENAME, sigc::mem_fun (*this, &SoundFileBrowser::on_audio_and_midi_filter));
	audio_and_midi_filter.set_name (_("Audio and MIDI files"));

	midi_filter.add_custom (FILE_FILTER_FILENAME, sigc::mem_fun(*this, &SoundFileBrowser::on_midi_filter));
	midi_filter.set_name (_("MIDI files"));

	matchall_filter.add_pattern ("*.*");
	matchall_filter.set_name (_("All files"));

	chooser.add_filter (audio_and_midi_filter);
	chooser.add_filter (midi_filter);
	chooser.add_filter (matchall_filter);
#endif
	chooser.set_select_multiple (true);
	chooser.signal_update_preview().connect(sigc::mem_fun(*this, &SoundFileBrowser::update_preview));
	chooser.signal_file_activated().connect (sigc::mem_fun (*this, &SoundFileBrowser::chooser_file_activated));

#ifdef __APPLE__
	/* some broken redraw behaviour - this is a bandaid */
	chooser.signal_selection_changed().connect (mem_fun (chooser, &Widget::queue_draw));
#endif

	if (!persistent_folder.empty()) {
		chooser.set_current_folder (persistent_folder);
	}

	notebook.append_page (chooser, _("Browse Files"));

	hpacker.set_spacing (6);
	hpacker.pack_start (notebook, true, true);
	hpacker.pack_start (preview, false, false);

	vpacker.set_spacing (6);
	vpacker.pack_start (hpacker, true, true);

	add (vpacker);

#ifndef LIVETRAX
	//add tag search

	VBox* vbox;
	HBox* hbox;

	hbox = manage(new HBox);
	hbox->pack_start (found_entry);
	hbox->pack_start (found_search_btn);

	Gtk::ScrolledWindow *scroll = manage(new ScrolledWindow);
	scroll->add(found_list_view);
	scroll->set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

	vbox = manage(new VBox);
	vbox->pack_start (*hbox, PACK_SHRINK);
	vbox->pack_start (*scroll);

	found_list_view.append_column(_("Paths"), found_list_columns.pathname);

	found_list_view.get_selection()->signal_changed().connect(sigc::mem_fun(*this, &SoundFileBrowser::found_list_view_selected));

	found_list_view.signal_row_activated().connect (sigc::mem_fun (*this, &SoundFileBrowser::found_list_view_activated));

	found_search_btn.signal_clicked().connect(sigc::mem_fun(*this, &SoundFileBrowser::found_search_clicked));
	found_entry.signal_activate().connect(sigc::mem_fun(*this, &SoundFileBrowser::found_search_clicked));

	notebook.append_page (*vbox, _("Search Tags"));

	//add freesound search

	HBox* passbox;
	Label* label;

	passbox = manage(new HBox);
	passbox->set_spacing (6);

	vbox = manage (new VBox);
	label = manage (new Label);
	label->set_alignment (Gtk::ALIGN_START);
	label->set_text (_("Tags:"));
	vbox->pack_start (*label, false, false);
	vbox->pack_start (freesound_entry, true, true);
	passbox->pack_start(*vbox, true, true);

	vbox = manage (new VBox);
	label = manage (new Label);
	label->set_text (_("Sort:"));
	label->set_alignment (Gtk::ALIGN_START);
	vbox->pack_start (*label, false, false);
	vbox->pack_start (freesound_sort, false, false);
	freesound_sort.clear_items();

	// Order of the following must correspond with enum sortMethod
	// in sfdb_freesound_mootcher.h
	freesound_sort.append(_("None"));
	freesound_sort.append(_("Longest"));
	freesound_sort.append(_("Shortest"));
	freesound_sort.append(_("Newest"));
	freesound_sort.append(_("Oldest"));
	freesound_sort.append(_("Most downloaded"));
	freesound_sort.append(_("Least downloaded"));
	freesound_sort.append(_("Highest rated"));
	freesound_sort.append(_("Lowest rated"));
	freesound_sort.set_active(0);
	passbox->pack_start(*vbox, false, false);

	vbox = manage (new VBox);
	label = manage (new Label);
	label->set_text (_("License:"));
	label->set_alignment (Gtk::ALIGN_START);
	vbox->pack_start (*label, false, false);

	vbox->pack_start (freesound_licence, false, false);
	freesound_licence.clear_items();
	freesound_licence.append(_("Any"));
	freesound_licence.append(_("CC-BY"));
	freesound_licence.append(_("CC-BY-NC"));
	freesound_licence.append(_("PD"));
	freesound_licence.set_active(0);

	passbox->pack_start(*vbox, false, false);

	passbox->pack_start (freesound_search_btn, false, false);
	passbox->pack_start (freesound_more_btn, false, false);
	freesound_more_btn.set_label(_("More"));
	freesound_more_btn.set_sensitive(false);

	passbox->pack_start (freesound_similar_btn, false, false);
	freesound_similar_btn.set_label(_("Similar"));
	freesound_similar_btn.set_sensitive(false);

	scroll = manage(new ScrolledWindow);
	scroll->add(freesound_list_view);
	scroll->set_policy(Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);

	vbox = manage(new VBox);
	vbox->set_spacing (3);
	vbox->pack_start (*passbox, PACK_SHRINK);
	vbox->pack_start (*scroll);

	freesound_list_view.append_column(_("ID")      ,    freesound_list_columns.id);
	freesound_list_view.append_column(_("Filename"),    freesound_list_columns.filename);
	freesound_list_view.append_column(_("Duration"),    freesound_list_columns.duration);
	freesound_list_view.append_column(_("Size"),        freesound_list_columns.filesize);
	freesound_list_view.append_column(_("Sample Rate"), freesound_list_columns.smplrate);
	freesound_list_view.append_column(_("License"),     freesound_list_columns.license);

	// filename
	freesound_list_view.get_column(1)->set_expand(true);
	freesound_list_view.get_column(1)->set_resizable(true);
	freesound_list_view.get_column(1)->set_sizing(Gtk::TREE_VIEW_COLUMN_FIXED);

	// duration: justify contents right
	CellRendererText* renderer = dynamic_cast<CellRendererText*> (freesound_list_view.get_column(2)->get_first_cell ());
	if (renderer) {
		renderer->property_xalign () = 1.0;
	}

	freesound_list_view.get_selection()->signal_changed().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_list_view_selected));
	freesound_list_view.set_tooltip_column(7);

	freesound_list_view.get_selection()->set_mode (SELECTION_MULTIPLE);
	freesound_list_view.signal_row_activated().connect (sigc::mem_fun (*this, &SoundFileBrowser::freesound_list_view_activated));
	freesound_search_btn.signal_clicked().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_search_clicked));
	freesound_entry.signal_activate().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_search_clicked));

	/* disable "More" button when search parameters change */
	freesound_entry.signal_changed().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_search_params_changed));
	freesound_sort.signal_changed().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_search_params_changed));
	freesound_licence.signal_changed().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_search_params_changed));

	freesound_more_btn.signal_clicked().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_more_clicked));
	freesound_similar_btn.signal_clicked().connect(sigc::mem_fun(*this, &SoundFileBrowser::freesound_similar_clicked));
	notebook.append_page (*vbox, _("Search Freesound"));
#endif

	notebook.set_size_request (500, -1);
	notebook.signal_switch_page().connect (sigc::hide_return (sigc::hide (sigc::hide (sigc::mem_fun (*this, &SoundFileBrowser::reset_options)))));

	set_session (s);

	Gtk::HButtonBox* button_box = manage (new HButtonBox);

	button_box->set_layout (BUTTONBOX_END);

	button_box->pack_start (import_button, false, false);
	import_button.signal_clicked().connect (sigc::bind (sigc::mem_fun (*this, &SoundFileBrowser::do_something), RESPONSE_OK));

	Gtkmm2ext::UI::instance()->set_tip (import_button, _("Press to import selected files"));

	vpacker.pack_end (*button_box, false, false);

	set_wmclass (X_("import"), PROGRAM_NAME);
}

SoundFileBrowser::~SoundFileBrowser ()
{
	persistent_folder = chooser.get_current_folder();
}

int
SoundFileBrowser::run ()
{
	set_modal (true);
	show_all ();
	present ();

	_done = false;

	while (!_done) {
		gtk_main_iteration ();
	}

	return _status;
}

void
SoundFileBrowser::set_action_sensitive (bool yn)
{
	import_button.set_sensitive (yn);
}

bool
SoundFileBrowser::get_action_sensitive () const
{
	return import_button.get_sensitive ();
}

void
SoundFileBrowser::do_something (int action)
{
	_done = true;
	_status = action;
}

void
SoundFileBrowser::on_show ()
{
	ArdourWindow::on_show ();
	reset_options ();
	start_metering ();
}

bool
SoundFileBrowser::on_key_press_event (GdkEventKey* ev)
{
	if (ev->keyval == GDK_Escape) {
		do_something (RESPONSE_CLOSE);
		return true;
	}
	if (ev->keyval == GDK_space && ev->type == GDK_KEY_PRESS) {
		if (get_action_sensitive()) {
			preview.audition();
			return true;
		}
	}
	return ArdourWindow::on_key_press_event (ev);
}

void
SoundFileBrowser::clear_selection ()
{
	chooser.unselect_all ();
	found_list_view.get_selection()->unselect_all ();
}

void
SoundFileBrowser::chooser_file_activated ()
{
	do_something (RESPONSE_OK);
}

void
SoundFileBrowser::found_list_view_activated (const TreeModel::Path&, TreeViewColumn*)
{
	preview.audition ();
}

void
SoundFileBrowser::freesound_list_view_activated (const TreeModel::Path&, TreeViewColumn*)
{
	preview.audition ();
}

void
SoundFileBrowser::set_session (Session* s)
{
	ArdourWindow::set_session (s);

	if (_session) {
		preview.set_session (s);
		add_gain_meter ();
	} else {
		remove_gain_meter ();
	}
}

void
SoundFileBrowser::add_gain_meter ()
{
	delete gm;

	std::shared_ptr<Route> r = _session->the_auditioner ();

	if (r) {
		gm = new GainMeter (_session, 250);

		gm->set_controls (r, r->shared_peak_meter(), r->amp(), r->gain_control());
		gm->set_fader_name (X_("GainFader"));

		meter_packer.set_border_width (12);
		meter_packer.pack_start (*gm, false, true);
		hpacker.pack_end (meter_packer, false, false);
		meter_packer.show_all ();
		start_metering ();
	}
}

void
SoundFileBrowser::remove_gain_meter ()
{
	if (gm) {
		meter_packer.remove (*gm);
		hpacker.remove (meter_packer);
		delete gm;
		gm = 0;
	}
}

void
SoundFileBrowser::start_metering ()
{
	metering_connection = Timers::super_rapid_connect (sigc::mem_fun(*this, &SoundFileBrowser::meter));
}

void
SoundFileBrowser::stop_metering ()
{
	metering_connection.disconnect();
}

void
SoundFileBrowser::meter ()
{
	if (get_mapped () && _session && gm) {
		gm->update_meters ();
	}
}

bool
SoundFileBrowser::on_audio_filter (const FileFilter::Info& filter_info)
{
	return AudioFileSource::safe_audio_file_extension (filter_info.filename);
}

bool
SoundFileBrowser::on_midi_filter (const FileFilter::Info& filter_info)
{
	return SMFSource::safe_midi_file_extension (filter_info.filename);
}

bool
SoundFileBrowser::on_audio_and_midi_filter (const FileFilter::Info& filter_info)
{
	return on_audio_filter (filter_info) || on_midi_filter (filter_info);
}

void
SoundFileBrowser::update_preview ()
{
	if (preview.setup_labels (chooser.get_preview_filename())) {
		if (preview.autoplay()) {
			Glib::signal_idle().connect (sigc::mem_fun (preview, &SoundFileBox::audition_oneshot));
		}
	}
}

void
SoundFileBrowser::found_list_view_selected ()
{
	if (!reset_options ()) {
		set_action_sensitive (false);
	} else {
		string file;

		ListPath rows = found_list_view.get_selection()->get_selected_rows ();

		if (!rows.empty()) {
			TreeIter iter = found_list->get_iter(*rows.begin());
			file = (*iter)[found_list_columns.pathname];
			chooser.set_filename (file);
			set_action_sensitive (true);
		} else {
			set_action_sensitive (false);
		}

		preview.setup_labels (file);
	}
}

void
SoundFileBrowser::found_search_clicked ()
{
	string tag_string = found_entry.get_text ();

	vector<string> tags;

	if (!PBD::tokenize (tag_string, string(","), std::back_inserter (tags), true)) {
		warning << _("SoundFileBrowser: Could not tokenize string: ") << tag_string << endmsg;
		return;
	}

	vector<string> results;
	Library->search_members_and (results, tags);

	found_list->clear();
	for (vector<string>::iterator i = results.begin(); i != results.end(); ++i) {
		TreeModel::iterator new_row = found_list->append();
		TreeModel::Row row = *new_row;
		string path = Glib::filename_from_uri (string ("file:") + *i);
		row[found_list_columns.pathname] = path;
	}
}


std::string
SoundFileBrowser::freesound_get_audio_file(Gtk::TreeIter iter)
{

	Mootcher *mootcher = new Mootcher(freesound_token);
	std::string file;

	string id  = (*iter)[freesound_list_columns.id];
	string uri = (*iter)[freesound_list_columns.uri];
	string filename = ARDOUR::legalize_for_path((*iter)[freesound_list_columns.filename]);

	if (mootcher->checkAudioFile(filename, id)) {
		// file already exists, no need to download it again
		file = mootcher->audioFileName;
		delete mootcher;
		(*iter)[freesound_list_columns.downloading] = false;
		return file;
	}

	if (!(*iter)[freesound_list_columns.downloading]) {
		// start downloading the sound file
		DEBUG_TRACE(PBD::DEBUG::Freesound, string_compose("downloading %1 (id %2) from %3...\n", filename, id, uri));
		(*iter)[freesound_list_columns.downloading] = true;
		// if we don't already have a token, fetchAudioFile() will get
		// one: otherwise it'll return the one we already gave it.
		if (!mootcher->fetchAudioFile(filename, id, uri, this, freesound_token)) {
			// download cancelled or failed
			(*iter)[freesound_list_columns.downloading] = false;
		}
	}

	return "";
}

void
SoundFileBrowser::freesound_list_view_selected ()
{

	if (!reset_options ()) {
		set_action_sensitive (false);
	} else {
		std::string file;
		ListPath rows = freesound_list_view.get_selection()->get_selected_rows ();
		for (ListPath::iterator i = rows.begin() ; i != rows.end(); ++i) {
			file = freesound_get_audio_file (freesound_list->get_iter(*i));
		}

		switch (rows.size()) {
			case 0:
				// nothing selected
				freesound_similar_btn.set_sensitive (false);
				set_action_sensitive (false);
				break;
			case 1:
				// exactly one item selected
				if (file != "") {
					// file exists on disk already
					chooser.set_filename (file);
					preview.setup_labels (file);
					set_action_sensitive (true);
				} else {
					// file doesn't exist yet, maybe still downloading:
					// disable preview
					preview.setup_labels ("");
				}
				freesound_similar_btn.set_sensitive (true);
				break;
			default:
				// multiple items selected
				preview.setup_labels ("");
				freesound_similar_btn.set_sensitive (false);
				break;
		}

	}
}

void
SoundFileBrowser::refresh_display(std::string ID, std::string file)
{
	// called when the mootcher has finished downloading a file
	ListPath rows = freesound_list_view.get_selection()->get_selected_rows ();
	if (rows.size() == 1) {
		// there's a single item selected in the freesound list
		//XXX make a function to be used to construct the actual file name both here and in the mootcher
		Gtk::TreeIter row = freesound_list->get_iter(*rows.begin());
		std::string selected_ID = (*row)[freesound_list_columns.id];
		if (ID == selected_ID) {
			// the selected item in the freesound list is the item that has just finished downloading
			chooser.set_filename (file);
			preview.setup_labels (file);
			set_action_sensitive (true);
		}
	}
}

void
SoundFileBrowser::freesound_search_clicked ()
{
	freesound_page = 1;
	freesound_list->clear();
	matches = 0;
	freesound_search();
}

void
SoundFileBrowser::freesound_more_clicked ()
{
	char row_path[21];
	freesound_page++;
	freesound_search();
	snprintf(row_path, 21, "%d", (freesound_page - 1) * 100);
	freesound_list_view.scroll_to_row(Gtk::TreePath(row_path), 0);
}

void
SoundFileBrowser::freesound_search_params_changed ()
{
	freesound_page = 1;
	freesound_more_btn.set_sensitive(false);
}

void
SoundFileBrowser::freesound_similar_clicked ()
{
	ListPath rows = freesound_list_view.get_selection()->get_selected_rows ();
	if (rows.size() == 1) {
		Mootcher mootcher(""); // no need for oauth token when searching
		string id;
		Gtk::TreeIter iter = freesound_list->get_iter(*rows.begin());
		id = (*iter)[freesound_list_columns.id];
		freesound_list->clear();

		GdkCursor *prev_cursor;
		prev_cursor = gdk_window_get_cursor (get_window()->gobj());
		gdk_window_set_cursor (get_window()->gobj(), gdk_cursor_new(GDK_WATCH));
		gdk_flush();

		std::string theString = mootcher.searchSimilar(id);

		gdk_window_set_cursor (get_window()->gobj(), prev_cursor);
		handle_freesound_results(theString);
	}
}

std::string SoundFileBrowser::freesound_licence_filter()
{
	/* Return a filter string corresponding to the chosen licence filter
	 * type: see https://freesound.org/docs/api/resources_apiv2.html#text-search
	 * Note that values containing spaces need to be enclosed in
	 * double-quotes, though the documentation doesn't mention this.
	 */
	switch (freesound_licence.get_active_row_number()) {
		case 1: return "license: Attribution"; // CC-BY
		case 2: return "license: \"Attribution Noncommercial\""; // CC-BY-NC
		case 3: return "license: \"Creative Commons 0\""; // PD
		default: return "";
	}
}

void
SoundFileBrowser::freesound_search()
{
	Mootcher mootcher(""); // no need for oauth token when searching

	string search_string = freesound_entry.get_text ();
	enum sortMethod sort_method = (enum sortMethod) freesound_sort.get_active_row_number();

	GdkCursor *prev_cursor;
	prev_cursor = gdk_window_get_cursor (get_window()->gobj());
	gdk_window_set_cursor (get_window()->gobj(), gdk_cursor_new(GDK_WATCH));
	gdk_flush();

	std::string theString = mootcher.searchText(
			search_string,
			freesound_page,
			freesound_licence_filter(),
			sort_method
			);

	gdk_window_set_cursor (get_window()->gobj(), prev_cursor);
	handle_freesound_results(theString);
}

void
SoundFileBrowser::handle_freesound_results(std::string theString) {
	XMLTree doc;
	doc.read_buffer (theString.c_str());
	XMLNode *root = doc.root();

	if (!root) {
		error << "no root XML node!" << endmsg;
		return;
	}

	if ( strcmp(root->name().c_str(), "root") != 0) {
		error << string_compose ("root node name == %1 != \"root\"", root->name()) << endmsg;
		return;
	}

	// find out how many pages are available to search
	int freesound_n_pages = 1;
	XMLNode *res = root->child("count");
	if (res) {
		string result = res->child("text")->content();
		freesound_n_pages = atoi(result);
	}

	int more_pages = freesound_n_pages - freesound_page;

	if (more_pages > 0) {
		freesound_more_btn.set_sensitive (true);
		freesound_more_btn.set_tooltip_text(string_compose(P_(
						"%1 more page of 100 results available",
						"%1 more pages of 100 results available",
						more_pages), more_pages));
	} else {
		freesound_more_btn.set_sensitive (false);
		freesound_more_btn.set_tooltip_text(_("No more results available"));
	}

	XMLNode *sounds_root = root->child("results");
	if (!sounds_root) {
		error << "no child node \"results\" found!" << endmsg;
		return;
	}

	XMLNodeList sounds = sounds_root->children();
	if (sounds.size() == 0) {
		/* nothing found */
		return;
	}

	XMLNodeConstIterator niter;
	XMLNode *node;
	for (niter = sounds.begin(); niter != sounds.end(); ++niter) {
		node = *niter;
		if( strcmp( node->name().c_str(), "list-item") != 0 ) {
			error << string_compose ("node->name()=%1 != \"list-item\"", node->name()) << endmsg;
			break;
		}

		// node->dump(cerr, "node:");

		XMLNode *id_node  = node->child ("id");
		XMLNode *uri_node;
		XMLNode *pre_node = node->child ("previews");
		if (false && pre_node) {
			uri_node = pre_node->child ("preview-hq-ogg");
		} else {
		        uri_node = node->child ("download");
		}
		XMLNode *filename_node = node->child ("name");
		XMLNode *duration_node = node->child ("duration");
		XMLNode *filesize_node = node->child ("filesize");
		XMLNode *samplerate_node = node->child ("samplerate");
		XMLNode *licence_node = node->child ("license");

		if (id_node && uri_node && filename_node && duration_node && filesize_node && samplerate_node) {

			std::string id       =  id_node->child("text")->content();
			std::string uri      = uri_node->child("text")->content();
			std::string filename = filename_node->child("text")->content();
			std::string duration = duration_node->child("text")->content();
			std::string filesize = filesize_node->child("text")->content();
			std::string samplerate = samplerate_node->child("text")->content();
			std::string licence = licence_node->child("text")->content();

			DEBUG_TRACE(PBD::DEBUG::Freesound, string_compose(
					"id=%1 ,uri=%2 ,filename=%3 ,duration=%4\n",
					id, uri, filename, duration
			));

			double duration_seconds = atof (duration);
			double h, m, s;
			char duration_hhmmss[32];
			if (duration_seconds > 99 * 60 * 60) {
				strcpy(duration_hhmmss, ">99h");
			} else {
				s = modf(duration_seconds/60, &m) * 60;
				m = modf(m/60, &h) * 60;
				if (h > 0) {
					snprintf(duration_hhmmss, sizeof (duration), "%2.fh:%02.fm:%04.1fs", h, m, s);
				} else if (m > 0) {
					snprintf(duration_hhmmss, sizeof (duration), "%2.fm:%04.1fs", m, s);
				} else {
					snprintf(duration_hhmmss, sizeof (duration), "%4.1fs", s);
				}
			}

			double size_bytes = atof(filesize);
			char bsize[32];
			if (size_bytes < 1000) {
				sprintf(bsize, "%.0f %s", size_bytes, _("B"));
			} else if (size_bytes < 1000000 ) {
				sprintf(bsize, "%.1f %s", size_bytes / 1000.0, _("kB"));
			} else if (size_bytes < 10000000) {
				sprintf(bsize, "%.1f %s", size_bytes / 1000000.0, _("MB"));
			} else if (size_bytes < 1000000000) {
				sprintf(bsize, "%.2f %s", size_bytes / 1000000.0, _("MB"));
			} else {
				sprintf(bsize, "%.2f %s", size_bytes / 1000000000.0, _("GB"));
			}

			/* see http://www.freesound.org/help/faq/#licenses */
			char shortlicense[64];
			if (licence.find("://creativecommons.org/licenses/by-nc/") != std::string::npos){
				sprintf(shortlicense, "CC-BY-NC");
			} else if (licence.find ("://creativecommons.org/licenses/by/") != std::string::npos) {
				sprintf(shortlicense, "CC-BY");
			} else if (licence.find ("://creativecommons.org/licenses/sampling+/1.0/") != std::string::npos) {
				sprintf(shortlicense, "sampling+");
			} else if (licence.find ("://creativecommons.org/publicdomain/") != std::string::npos) {
				sprintf(shortlicense, "PD");
			} else {
				snprintf(shortlicense, 64, "%s", licence.c_str());
				shortlicense[63]= '\0';
			}

			TreeModel::iterator new_row = freesound_list->append();
			TreeModel::Row row = *new_row;

			row[freesound_list_columns.id      ] = id;
			row[freesound_list_columns.uri     ] = uri;
			row[freesound_list_columns.filename] = filename;
			row[freesound_list_columns.duration] = duration_hhmmss;
			row[freesound_list_columns.filesize] = bsize;
			row[freesound_list_columns.smplrate] = samplerate;
			row[freesound_list_columns.license ] = shortlicense;
			row[freesound_list_columns.tooltip ] = Gtkmm2ext::markup_escape_text(filename) + "\n" + licence;
			matches++;
		} else {
			error << _("Failed to retrieve XML for file") << std::endl;
		}
	}
}

vector<string>
SoundFileBrowser::get_paths ()
{
	vector<string> results;

	int n = notebook.get_current_page ();

	if (n == 0) {
		vector<string> filenames = chooser.get_filenames();
		vector<string>::iterator i;

		struct SortByName {
			bool operator() (std::string const& a, std::string const& b) const {
				return PBD::naturally_less (a.c_str (), b.c_str ());
			}
		};

		std::map<std::string, int64_t, SortByName> im;

		for (i = filenames.begin(); i != filenames.end(); ++i) {
			GStatBuf buf;
			if ((!g_stat((*i).c_str(), &buf)) && S_ISREG(buf.st_mode)) {
				results.push_back (*i);
				im[*i] = buf.st_mtime;
			}
		}
		if (sort_order () == FileMtime) {
			results.clear ();
			std::multimap<int64_t, std::string> im2;
			std::transform (im.begin (), im.end (),
					std::inserter (im2, im2.begin ()),
					[](std::pair<std::string, int64_t>i) {return std::pair<int64_t, std::string>(i.second, i.first);});

			for (auto const& i : im2) {
				results.push_back (i.second);
			}
		} else if (sort_order () == FileName) {
			results.clear ();
			for (auto const& i : im) {
				results.push_back (i.first);
			}
		}

	} else if (n == 1) {

		ListPath rows = found_list_view.get_selection()->get_selected_rows ();
		for (ListPath::iterator i = rows.begin() ; i != rows.end(); ++i) {
			TreeIter iter = found_list->get_iter(*i);
			string str = (*iter)[found_list_columns.pathname];

			results.push_back (str);
		}
	} else {
		ListPath rows = freesound_list_view.get_selection()->get_selected_rows ();
		for (ListPath::iterator i = rows.begin() ; i != rows.end(); ++i) {
			string str = freesound_get_audio_file (freesound_list->get_iter(*i));
			if (str != "") {
				results.push_back (str);
			}
		}
	}

	return results;
}

void
SoundFileOmega::reset_options_noret ()
{
	if (!resetting_ourselves) {
		(void) reset_options ();
	}
}

bool
SoundFileOmega::reset_options ()
{
	if (_import_active) {
		_reset_post_import = true;
		return true;
	}

	vector<string> paths = get_paths ();

	if (paths.empty()) {

		channel_combo.set_sensitive (false);
		action_combo.set_sensitive (false);
		sort_combo.set_sensitive (false);
		where_combo.set_sensitive (false);
		copy_files_btn.set_active (true);
		copy_files_btn.set_sensitive (false);
		midi_track_name_combo.set_sensitive (false);
		smf_tempo_btn.set_sensitive (false);
		smf_marker_btn.set_sensitive (false);

		return false;

	} else {

		channel_combo.set_sensitive (true);
		action_combo.set_sensitive (true);
		where_combo.set_sensitive (true);
		sort_combo.set_sensitive (paths.size () > 1 && (ImportAsTrack == get_mode () || ImportAsTrigger == get_mode ()));

		/* if we get through this function successfully, this may be
		   reset at the end, once we know if we can use hard links
		   to do embedding (or if we are importing a MIDI file).
		*/

		copy_files_btn.set_sensitive (false);
	}

	bool same_size;
	bool src_needed;
	bool must_copy;
	bool selection_includes_multichannel;
	bool selection_can_be_embedded_with_links = check_link_status (_session, paths);
	ImportMode mode;

	/* See if we are thinking about importing any MIDI files */
	vector<string>::iterator i = paths.begin ();
	while (i != paths.end() && SMFSource::valid_midi_file (*i) == false) {
		++i;
	}
	bool const have_a_midi_file = (i != paths.end ());

	if (check_info (paths, same_size, src_needed, selection_includes_multichannel, must_copy)) {
		Glib::signal_idle().connect (sigc::mem_fun (*this, &SoundFileOmega::bad_file_message));
		return false;
	}

	midi_track_name_combo.set_sensitive (have_a_midi_file);
	smf_tempo_btn.set_sensitive (have_a_midi_file);
	smf_marker_btn.set_sensitive (have_a_midi_file);

	string existing_choice;
	vector<string> action_strings;

	resetting_ourselves = true;

	if (chooser.get_filter() == &audio_filter) {

		/* AUDIO */

		if (selected_audio_track_cnt > 0) {
			if (channel_combo.get_active_text().length()) {
				ImportDisposition id = get_channel_disposition();

				switch (id) {
				case Editing::ImportDistinctFiles:
					if (selected_audio_track_cnt == paths.size()) {
						action_strings.push_back (importmode2string (ImportToTrack));
					}
					break;

				case Editing::ImportDistinctChannels:
					/* XXX it would be nice to allow channel-per-selected track
					   but its too hard we don't want to deal with all the
					   different per-file + per-track channel configurations.
					*/
					break;

				default:
					action_strings.push_back (importmode2string (ImportToTrack));
					break;
				}
			}
		}

	}  else {

		/* MIDI ONLY */

		if (selected_midi_track_cnt > 0) {
			action_strings.push_back (importmode2string (ImportToTrack));
		}
	}

	action_strings.push_back (importmode2string (ImportAsTrack));
#ifndef LIVETRAX
	action_strings.push_back (importmode2string (ImportAsRegion));
#endif

	existing_choice = action_combo.get_active_text();

	set_popdown_strings (action_combo, action_strings);

	/* preserve any existing choice, if possible */
	if (existing_choice.length()) {
		vector<string>::iterator x;
		for (x = action_strings.begin(); x != action_strings.end(); ++x) {
			if (*x == existing_choice) {
				action_combo.set_active_text (existing_choice);
				break;
			}
		}
		if (x == action_strings.end()) {
			action_combo.set_active_text (action_strings.front());
		}
	} else {
		action_combo.set_active_text (action_strings.front());
	}

	resetting_ourselves = false;

	if ((mode = get_mode()) == ImportAsRegion) {
		where_combo.set_sensitive (false);
	} else {
		where_combo.set_sensitive (true);
	}

	vector<string> channel_strings;

	if (mode == ImportAsTrack || mode == ImportToTrack) {

		channel_strings.push_back (_("one track per file"));

		if (selection_includes_multichannel) {
			channel_strings.push_back (_("one track per channel"));
		}

#ifndef LIVETRAX
		if (paths.size() > 1) {
			/* tape tracks are a single region per track, so we cannot
			   sequence multiple files.
			*/
			channel_strings.push_back (_("sequence files"));
			if (same_size) {
				channel_strings.push_back (_("all files in one track"));
				channel_strings.push_back (_("merge files"));
			}

		}
#endif

	} else {
		channel_strings.push_back (_("one region per file"));

		if (selection_includes_multichannel) {
			channel_strings.push_back (_("one region per channel"));
		}

#ifndef LIVETRAX
		if (paths.size() > 1) {
			if (same_size) {
				channel_strings.push_back (_("all files in one region"));
			}
		}
#endif
	}

	resetting_ourselves = true;

	existing_choice = channel_combo.get_active_text();

	set_popdown_strings (channel_combo, channel_strings);

	/* preserve any existing choice, if possible */

	if (existing_choice.length()) {
		vector<string>::iterator x;
		for (x = channel_strings.begin(); x != channel_strings.end(); ++x) {
			if (*x == existing_choice) {
				channel_combo.set_active_text (existing_choice);
				break;
			}
		}
		if (x == channel_strings.end()) {
			channel_combo.set_active_text (channel_strings.front());
		}
	} else {
		channel_combo.set_active_text (channel_strings.front());
	}

	resetting_ourselves = false;

	if (src_needed) {
		src_combo.set_sensitive (true);
	} else {
		src_combo.set_sensitive (false);
	}

	/* We must copy MIDI files or those from Freesound
	 * or any file if we are under nsm control */
	must_copy |= _session->get_nsm_state() || have_a_midi_file || notebook.get_current_page() == 2;

	if (must_copy || !selection_can_be_embedded_with_links) {
		copy_files_btn.set_active (true);
	}
	copy_files_btn.set_sensitive (!must_copy && selection_can_be_embedded_with_links);

	return true;
}

bool
SoundFileOmega::bad_file_message()
{
	MessageDialog msg (*this,
			   string_compose (_("One or more of the selected files\ncannot be used by %1"), PROGRAM_NAME),
			   true,
			   Gtk::MESSAGE_INFO,
			   Gtk::BUTTONS_OK);
	msg.run ();
	resetting_ourselves = true;
	chooser.unselect_uri (chooser.get_preview_uri());
	resetting_ourselves = false;

	return false;
}

bool
SoundFileOmega::check_info (const vector<string>& paths, bool& same_size, bool& src_needed, bool& multichannel, bool& must_copy)
{
	SoundFileInfo info;
	samplepos_t sz = 0;
	bool err = false;
	string errmsg;

	same_size = true;
	src_needed = false;
	multichannel = false;
	must_copy = false;

	for (vector<string>::const_iterator i = paths.begin(); i != paths.end(); ++i) {

		if (AudioFileSource::get_soundfile_info (*i, info, errmsg)) {
			if (info.channels > 1) {
				multichannel = true;
			}
			if (sz == 0) {
				sz = info.length;
			} else {
				if (sz != info.length) {
					same_size = false;
				}
			}

			if (info.samplerate != _session->sample_rate()) {
				src_needed = true;
			}
			if (!info.seekable) {
				must_copy = true;
			}

		} else if (SMFSource::valid_midi_file (*i)) {

			Evoral::SMF reader;

			if (reader.open (*i)) {
				err = true;
			} else {
				if (reader.num_channels() > 1) {
					multichannel = true;
				}
			}

		} else {
			err = true;
		}
	}

	return err;
}


bool
SoundFileOmega::check_link_status (const Session* s, const vector<string>& paths)
{
	std::string tmpdir(Glib::build_filename (s->session_directory().sound_path(), "linktest"));

	if (g_mkdir (tmpdir.c_str(), 0744)) {
		if (errno != EEXIST) {
			return false;
		}
	}

	for (vector<string>::const_iterator i = paths.begin(); i != paths.end(); ++i) {

		char tmpc[PATH_MAX+1];
		snprintf (tmpc, sizeof(tmpc), "%s/%s", tmpdir.c_str(), Glib::path_get_basename (*i).c_str());

		/* can we link ? */
		if (PBD::hard_link (/*existing file*/(*i).c_str(), tmpc)) {
			::g_unlink (tmpc);
		}
	}

	g_rmdir (tmpdir.c_str());

	return true;
}

SoundFileChooser::SoundFileChooser (string title, ARDOUR::Session* s)
	: SoundFileBrowser (title, s, false)
{
	chooser.set_select_multiple (false);
	found_list_view.get_selection()->set_mode (SELECTION_SINGLE);
	freesound_list_view.get_selection()->set_mode (SELECTION_SINGLE);
}

void
SoundFileChooser::on_hide ()
{
	ArdourWindow::on_hide();
	stop_metering ();

	if (_session) {
		_session->cancel_audition();
	}
}

string
SoundFileChooser::get_filename ()
{
	vector<string> paths;

	paths = get_paths ();

	if (paths.empty()) {
		return string ();
	}

	if (!Glib::file_test (paths.front(), Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_REGULAR)) {
		return string();
	}

	return paths.front();
}

SoundFileOmega::SoundFileOmega (string title, ARDOUR::Session* s,
				uint32_t selected_audio_tracks,
				uint32_t selected_midi_tracks,
				bool persistent,
				Editing::ImportMode mode_hint)
	: SoundFileBrowser (title, s, persistent)
	, instrument_combo (InstrumentSelector::ForTrackSelector)
	, copy_files_btn ( _("Copy audio files to session"))
	, smf_tempo_btn (_("Use MIDI Tempo Map"))
	, smf_marker_btn (_("Import MIDI markers"))
	, selected_audio_track_cnt (selected_audio_tracks)
	, selected_midi_track_cnt (selected_midi_tracks)
	, _import_active (false)
	, _reset_post_import (false)
{
	vector<string> str;

	set_size_request (-1, 550);

	options.set_row_spacings(8);
	options.set_col_spacings(0);
	options.set_border_width(6);

	str.clear ();
	str.push_back (_("file timestamp"));
	str.push_back (_("edit point"));
	str.push_back (_("playhead"));
	str.push_back (_("session start"));
	set_popdown_strings (where_combo, str);
	where_combo.set_active_text (str.back());
	where_combo.signal_changed().connect (sigc::mem_fun (*this, &SoundFileOmega::where_combo_changed));

	instrument_combo_changed();
	instrument_combo.signal_changed().connect(sigc::mem_fun(*this, &SoundFileOmega::instrument_combo_changed) );

	Label* l = manage (new Label);
	l->set_markup (_("<b>Add files:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 0, 1, 0, 1, FILL, SHRINK, 4, 0);
	options.attach (action_combo, 1, 2, 0, 1, FILL, SHRINK, 2, 0);

	l = manage (new Label);
	l->set_markup (_("<b>Insert at:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 0, 1, 1, 2, FILL, SHRINK, 4, 0);
	options.attach (where_combo, 1, 2, 1, 2, FILL, SHRINK, 2, 0);

	l = manage (new Label);
	l->set_markup (_("<b>Mapping:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 0, 1, 2, 3, FILL, SHRINK, 4, 0);
	options.attach (channel_combo, 1, 2, 2, 3, FILL, SHRINK, 2, 0);

	l = manage (new Label);
	l->set_markup (_("<b>Sort order:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 0, 1, 3, 4, FILL, SHRINK, 4, 0);
	options.attach (sort_combo, 1, 2, 3, 4, FILL, SHRINK, 2, 0);

	/* 2nd col: MIDI */

	Alignment *vspace = manage (new Alignment ());
	vspace->set_size_request (16, 2);
	options.attach (*vspace, 2, 3, 6, 7, SHRINK, SHRINK, 0, 0);

#ifndef LIVETRAX
	l = manage (new Label);
	l->set_markup (_("<b>MIDI Instrument:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 3, 4, 0, 1, FILL, SHRINK, 4, 0);
	options.attach (instrument_combo, 4, 5, 0, 1, FILL, SHRINK, 2, 0);

	l = manage (new Label);
	l->set_markup (_("<b>MIDI Track Names:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 3, 4, 1, 2, FILL, SHRINK, 4, 0);
	options.attach (midi_track_name_combo, 4, 5, 1, 2, FILL, SHRINK, 2, 0);
#endif
	options.attach (smf_tempo_btn, 4, 5, 2, 3, FILL, SHRINK, 2, 0);
	options.attach (smf_marker_btn, 4, 5, 3, 4, FILL, SHRINK, 2, 0);

	/* 3rd col (Audio-only) */
	vspace = manage (new Alignment ());
	vspace->set_size_request (16, 2);
	options.attach (*vspace, 5, 6, 6, 7, SHRINK, SHRINK, 0, 0);

	l = manage (new Label);
	l->set_markup (_("<b>Audio conversion quality:</b>"));
	l->set_alignment(Gtk::ALIGN_END, Gtk::ALIGN_CENTER);
	options.attach (*l, 6, 7, 0, 1, FILL, SHRINK, 4, 0);
	options.attach (src_combo, 7, 8, 0, 1, FILL, SHRINK, 2, 0);

#ifndef LIVETRAX
	options.attach (copy_files_btn, 7, 8, 1, 2, FILL, SHRINK, 2, 0);
#endif

	str.clear ();
	str.push_back (_("by track number"));
	str.push_back (_("by track name"));
	str.push_back (_("by file and track name"));
	str.push_back (_("by instrument name"));
	set_popdown_strings (midi_track_name_combo, str);
	midi_track_name_combo.set_active_text (str.front());

	str.clear ();
	str.push_back (_("one track per file"));
	set_popdown_strings (channel_combo, str);
	channel_combo.set_active_text (str.front());
	channel_combo.set_sensitive (false);

	str.clear ();
	str.push_back (_("Best"));
	str.push_back (_("Good"));
	str.push_back (_("Quick"));
	str.push_back (_("Fast"));
	str.push_back (_("Fastest"));

	set_popdown_strings (src_combo, str);
	src_combo.set_active_text (str.front());
	src_combo.set_sensitive (false);
	src_combo.signal_changed().connect (sigc::mem_fun (*this, &SoundFileOmega::src_combo_changed));

	str.clear ();
	str.push_back (_("by file name"));
	str.push_back (_("by modification time"));
	str.push_back (_("by selection order"));
	set_popdown_strings (sort_combo, str);
	sort_combo.set_active_text (str.front());
	sort_combo.set_sensitive (false);

	action_combo.signal_changed().connect (sigc::mem_fun (*this, &SoundFileOmega::reset_options_noret));
	channel_combo.signal_changed().connect (sigc::mem_fun (*this, &SoundFileOmega::reset_options_noret));

	copy_files_btn.set_active (true);

	vpacker.pack_start (options, false, true);

	/* setup disposition map */

	disposition_map.insert (pair<string,ImportDisposition>(_("one track per file"), ImportDistinctFiles));
	disposition_map.insert (pair<string,ImportDisposition>(_("one track per channel"), ImportDistinctChannels));
	disposition_map.insert (pair<string,ImportDisposition>(_("merge files"), ImportMergeFiles));
	disposition_map.insert (pair<string,ImportDisposition>(_("sequence files"), ImportSerializeFiles));

	disposition_map.insert (pair<string,ImportDisposition>(_("one region per file"), ImportDistinctFiles));
	disposition_map.insert (pair<string,ImportDisposition>(_("one region per channel"), ImportDistinctChannels));
	disposition_map.insert (pair<string,ImportDisposition>(_("all files in one region"), ImportMergeFiles));
	disposition_map.insert (pair<string,ImportDisposition>(_("all files in one track"), ImportMergeFiles));

	chooser.signal_selection_changed().connect (sigc::mem_fun (*this, &SoundFileOmega::file_selection_changed));

	/* set size requests for a couple of combos to allow them to display the longest text
	   they will ever be asked to display.  This prevents them being resized when the user
	   selects a file to import, which in turn prevents the size of the dialog from jumping
	   around. */

	str.clear ();
	str.push_back (_("one track per file"));
	str.push_back (_("one track per channel"));
#ifndef LIVETRAX
	str.push_back (_("sequence files"));
	str.push_back (_("all files in one region"));
#endif
	set_popdown_strings (channel_combo, str);

	str.clear ();
	str.push_back (importmode2string (ImportAsTrack));
	str.push_back (importmode2string (ImportToTrack));
#ifndef LIVETRAX
	str.push_back (importmode2string (ImportAsRegion));
#endif
	set_popdown_strings (action_combo, str);
	action_combo.set_active_text (importmode2string(mode_hint));

	reset (selected_audio_tracks, selected_midi_tracks);
}

void
SoundFileOmega::set_mode (ImportMode mode)
{
	action_combo.set_active_text (importmode2string (mode));
}

ImportMode
SoundFileOmega::get_mode () const
{
	return string2importmode (action_combo.get_active_text());
}

SoundFileBrowser::SortOrder
SoundFileOmega::sort_order () const
{
	std::string const& str (sort_combo.get_active_text());
	if (str == _("by file name")) {
		return SoundFileBrowser::FileName;
	} else if (str == _("by modification time")) {
		return SoundFileBrowser::FileMtime;
	} else if (str == _("by selection order")) {
		return SoundFileBrowser::SelectionOrder;
	}
	warning << string_compose (_("programming error: unknown import sort string %1"), str) << endmsg;
	return SelectionOrder;
}

void
SoundFileOmega::on_hide ()
{
	ArdourWindow::on_hide();
	if (_session) {
		_session->cancel_audition();
	}
}

ImportPosition
SoundFileOmega::get_position() const
{
	string str = where_combo.get_active_text();

	if (str == _("file timestamp")) {
		return ImportAtTimestamp;
	} else if (str == _("edit point")) {
		return ImportAtEditPoint;
	} else if (str == _("playhead")) {
		return ImportAtPlayhead;
	} else {
		return ImportAtStart;
	}
}

SrcQuality
SoundFileOmega::get_src_quality() const
{
	string str = src_combo.get_active_text();

	if (str == _("Best")) {
		return SrcBest;
	} else if (str == _("Good")) {
		return SrcGood;
	} else if (str == _("Quick")) {
		return SrcQuick;
	} else if (str == _("Fast")) {
		return SrcFast;
	} else {
		return SrcFastest;
	}
}

void
SoundFileOmega::src_combo_changed()
{
	preview.set_src_quality(get_src_quality());
}

void
SoundFileOmega::where_combo_changed()
{
	preview.set_import_position(get_position());
}

void
SoundFileOmega::instrument_combo_changed()
{
	if (_session->the_auditioner()) {
		_session->the_auditioner()->set_audition_synth_info( instrument_combo.selected_instrument() );
	}
}

MidiTrackNameSource
SoundFileOmega::get_midi_track_name_source () const
{
	return string2miditracknamesource (midi_track_name_combo.get_active_text());
}

bool
SoundFileOmega::get_use_smf_tempo_map () const
{
	return smf_tempo_btn.get_active ();
}

bool
SoundFileOmega::get_use_smf_markers () const
{
	return smf_marker_btn.get_active ();
}


ImportDisposition
SoundFileOmega::get_channel_disposition () const
{
	/* we use a map here because the channel combo can contain different strings
	   depending on the state of the other combos. the map contains all possible strings
	   and the ImportDisposition enum that corresponds to it.
	*/

	string str = channel_combo.get_active_text();
	DispositionMap::const_iterator x = disposition_map.find (str);

	if (x == disposition_map.end()) {
		fatal << string_compose (_("programming error: %1 (%2)"), "unknown string for import disposition", str) << endmsg;
		abort(); /*NOTREACHED*/
	}

	return x->second;
}

void
SoundFileOmega::reset (uint32_t selected_audio_tracks, uint32_t selected_midi_tracks)
{
	selected_audio_track_cnt = selected_audio_tracks;
	selected_midi_track_cnt = selected_midi_tracks;

	if (selected_audio_track_cnt == 0 && selected_midi_track_cnt > 0) {
		chooser.set_filter (midi_filter);
	} else if (selected_midi_track_cnt == 0 && selected_audio_track_cnt > 0) {
		chooser.set_filter (audio_filter);
	} else {
		chooser.set_filter (audio_and_midi_filter);
	}

	if (get_visible()) {
		reset_options ();
	}
}

void
SoundFileOmega::file_selection_changed ()
{
	if (resetting_ourselves || !get_visible ()) {
		return;
	}

	if (!reset_options ()) {
		set_action_sensitive (false);
	} else {
		if (chooser.get_filenames().size() > 0) {
			set_action_sensitive (true);
		} else {
			set_action_sensitive (false);
		}
	}
}

void
SoundFileOmega::do_something (int action)
{
	SoundFileBrowser::do_something (action);

	if (action == RESPONSE_CLOSE || !ARDOUR_UI_UTILS::engine_is_running ()) {
		hide ();
		return;
	}

	/* lets do it */

	vector<string> paths = get_paths ();
	ImportPosition pos = get_position ();
	ImportMode mode = get_mode ();
	ImportDisposition chns = get_channel_disposition ();
	PluginInfoPtr instrument = instrument_combo.selected_instrument();
	timepos_t where;
	MidiTrackNameSource mts = get_midi_track_name_source ();
	MidiTempoMapDisposition mtd = (get_use_smf_tempo_map () ? SMFTempoUse : SMFTempoIgnore);
	bool with_midi_markers = get_use_smf_markers ();

	switch (pos) {
	case ImportAtEditPoint:
		where = PublicEditor::instance().get_preferred_edit_position ();
		break;
	case ImportAtTimestamp:
		where = timepos_t::max (Temporal::AudioTime);
		break;
	case ImportAtPlayhead:
		where = timepos_t (_session->transport_sample());
		break;
	case ImportAtStart:
		where = timepos_t (_session->current_start_sample());
		break;
	}

	SrcQuality quality = get_src_quality();

	_import_active = true;

	if (Profile->get_livetrax() || copy_files_btn.get_active()) {
		PublicEditor::instance().do_import (paths, chns, mode, quality, mts, mtd, where, instrument, std::shared_ptr<Track>(), with_midi_markers);
	} else {
		PublicEditor::instance().do_embed (paths, chns, mode, where, instrument);
	}

	_import_active = false;

	if (_reset_post_import) {
		_reset_post_import = false;
		reset_options ();
	}
}