midi_scene_change.cc

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/*
    Copyright (C) 2014 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 "pbd/error.h"
#include "pbd/compose.h"

#include "ardour/midi_port.h"
#include "ardour/midi_scene_change.h"

#include "i18n.h"

using namespace PBD;
using namespace ARDOUR;

MIDISceneChange::MIDISceneChange (int c, int b, int p)
        : _bank (b)
        , _program (p)
        , _channel (c & 0xf)
{
        if (_bank > 16384) {
                _bank = -1;
        }

        if (_program > 128) {
                _program = -1;
        }
}

MIDISceneChange::MIDISceneChange (const XMLNode& node, int version)
        : _bank (-1)
        , _program (-1)
        , _channel (-1)
{
        set_state (node, version);
}

MIDISceneChange::~MIDISceneChange ()
{
}

size_t
MIDISceneChange::get_bank_msb_message (uint8_t* buf, size_t size) const
{
        if (size < 3 || _bank < 0) {
                return 0;
        }

        buf[0] = 0xB0 | (_channel & 0xf);
        buf[1] = 0x0;
        buf[2] = (_bank >> 7) & 0x7f;

        return 3;
}

size_t
MIDISceneChange::get_bank_lsb_message (uint8_t* buf, size_t size) const
{
        if (size < 3 || _bank < 0) {
                return 0;
        }

        buf[0] = 0xB0 | (_channel & 0xf);
        buf[1] = 0x20;
        buf[2] = _bank & 0x7f;  

        return 3;
}

size_t
MIDISceneChange::get_program_message (uint8_t* buf, size_t size) const
{
        if (size < 2 || _program < 0) {
                return 0;
        }

        buf[0] = 0xC0 | (_channel & 0xf);
        buf[1] = _program & 0x7f;

        return 2;
}

XMLNode&
MIDISceneChange::get_state ()
{
        char buf[32];
        XMLNode* node = new XMLNode (SceneChange::xml_node_name);

        node->add_property (X_("type"), X_("MIDI"));
        snprintf (buf, sizeof (buf), "%d", (int) _program);
        node->add_property (X_("id"), id().to_s());
        snprintf (buf, sizeof (buf), "%d", (int) _program);
        node->add_property (X_("program"), buf);
        snprintf (buf, sizeof (buf), "%d", (int) _bank);
        node->add_property (X_("bank"), buf);
        snprintf (buf, sizeof (buf), "%d", (int) _channel);
        node->add_property (X_("channel"), buf);
        snprintf (buf, sizeof (buf), "%u", _color);
        node->add_property (X_("color"), buf);

        return *node;
}

int
MIDISceneChange::set_state (const XMLNode& node, int /* version-ignored */)
{
        if (!set_id (node)) {
                return -1;
        }

        const XMLProperty* prop;

        if ((prop = node.property (X_("program"))) == 0) {
                return -1;
        }
        _program = atoi (prop->value());

        if ((prop = node.property (X_("bank"))) == 0) {
                return -1;
        }
        _bank = atoi (prop->value());

        if ((prop = node.property (X_("channel"))) == 0) {
                return -1;
        }
        _channel = atoi (prop->value());

        if ((prop = node.property (X_("color"))) != 0) {
                _color = atoi (prop->value());
        } else {
                _color = out_of_bound_color;
        }

        return 0;
}

bool
MIDISceneChange::operator==(const MIDISceneChange& other) const
{
        return _program == other._program &&
                _bank == other._bank &&
                _channel == other._channel;
}