midi_patch_manager.cc

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/*
    Copyright (C) 2008 Hans Baier

    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.

    $Id$
*/

#include <boost/shared_ptr.hpp>

#include <glibmm/fileutils.h>

#include "pbd/file_utils.h"
#include "pbd/error.h"

#include "ardour/session.h"
#include "ardour/session_directory.h"
#include "ardour/midi_patch_manager.h"

#include "ardour/search_paths.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;
using namespace MIDI;
using namespace MIDI::Name;
using namespace PBD;

MidiPatchManager* MidiPatchManager::_manager = 0;

MidiPatchManager::MidiPatchManager ()
{
        refresh ();
}

void
MidiPatchManager::set_session (Session* s)
{
        SessionHandlePtr::set_session (s);
        refresh ();
        add_session_patches ();
}

void
MidiPatchManager::add_session_patches ()
{
        if (!_session) {
                return;
        }
        
        std::string path_to_patches = _session->session_directory().midi_patch_path();

        if (!Glib::file_test (path_to_patches, Glib::FILE_TEST_EXISTS)) {
                return;
        }

        assert (Glib::file_test (path_to_patches, Glib::FILE_TEST_IS_DIR));

        vector<std::string> result;

        find_files_matching_pattern (result, path_to_patches, "*.midnam");

        info << "Loading " << result.size() << " MIDI patches from " << path_to_patches << endmsg;

        for (vector<std::string>::iterator i = result.begin(); i != result.end(); ++i) {
                boost::shared_ptr<MIDINameDocument> document(new MIDINameDocument(*i));
                for (MIDINameDocument::MasterDeviceNamesList::const_iterator device =
                                        document->master_device_names_by_model().begin();
                                device != document->master_device_names_by_model().end();
                                ++device) {
                        //cerr << "got model " << device->first << endl;
                        // have access to the documents by model name
                        _documents[device->first] = document;
                        // build a list of all master devices from all documents
                        _master_devices_by_model[device->first] = device->second;
                        _all_models.insert(device->first);
                        const std::string& manufacturer = device->second->manufacturer();
                        if (_devices_by_manufacturer.find(manufacturer) == _devices_by_manufacturer.end()) {
                                MIDINameDocument::MasterDeviceNamesList empty;
                                _devices_by_manufacturer.insert(std::make_pair(manufacturer, empty));
                        }
                        _devices_by_manufacturer[manufacturer].insert(std::make_pair(device->first, device->second));

                        // make sure there are no double model names
                        // TODO: handle this gracefully.
                        assert(_documents.count(device->first) == 1);
                        assert(_master_devices_by_model.count(device->first) == 1);
                }
        }
}

void
MidiPatchManager::refresh()
{
        _documents.clear();
        _master_devices_by_model.clear();
        _all_models.clear();
        _devices_by_manufacturer.clear();

        Searchpath search_path = midi_patch_search_path ();
        vector<std::string> result;

        find_files_matching_pattern (result, search_path, "*.midnam");

        info << "Loading " << result.size() << " MIDI patches from " << search_path.to_string() << endmsg;

        for (vector<std::string>::iterator i = result.begin(); i != result.end(); ++i) {
                boost::shared_ptr<MIDINameDocument> document;
                try {
                        document = boost::shared_ptr<MIDINameDocument>(new MIDINameDocument(*i));
                } catch (...) {
                        error << "Error parsing MIDI patch file " << *i << endmsg;
                        continue;
                }
                for (MIDINameDocument::MasterDeviceNamesList::const_iterator device =
                             document->master_device_names_by_model().begin();
                     device != document->master_device_names_by_model().end();
                     ++device) {
                        if (_documents.find(device->first) != _documents.end()) {
                                warning << string_compose(_("Duplicate MIDI device `%1' in `%2' ignored"),
                                                          device->first, *i)
                                        << endmsg;
                                continue;
                        }
                                                      
                        _documents[device->first]               = document;
                        _master_devices_by_model[device->first] = device->second;

                        _all_models.insert(device->first);
                        const std::string& manufacturer = device->second->manufacturer();
                        if (_devices_by_manufacturer.find(manufacturer) == _devices_by_manufacturer.end()) {
                                MIDINameDocument::MasterDeviceNamesList empty;
                                _devices_by_manufacturer.insert(std::make_pair(manufacturer, empty));
                        }
                        _devices_by_manufacturer[manufacturer].insert(std::make_pair(device->first, device->second));
                }
        }

        if (_session) {
                add_session_patches ();
        }
}

void
MidiPatchManager::session_going_away ()
{
        SessionHandlePtr::session_going_away ();
        _documents.clear();
        _master_devices_by_model.clear();
        _all_models.clear();
        _devices_by_manufacturer.clear();
}