midi_channel_filter.h

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/*
    Copyright (C) 2006-2015 Paul Davis
    Author: David Robillard

    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.
*/

#ifndef __ardour_channel_filter_h__
#define __ardour_channel_filter_h__

#include <stdint.h>

#include <glib.h>

#include "ardour/types.h"
#include "pbd/signals.h"

namespace ARDOUR
{

class BufferSet;

class LIBARDOUR_API MidiChannelFilter
{
public:
        MidiChannelFilter();

        void filter(BufferSet& bufs);

        bool filter(uint8_t* buf, uint32_t len);

        bool set_channel_mode(ChannelMode mode, uint16_t mask);

        bool set_channel_mask(uint16_t mask);

        void get_mode_and_mask(ChannelMode* mode, uint16_t* mask) const {
                const uint32_t mm = g_atomic_int_get(&_mode_mask);
                *mode = static_cast<ChannelMode>((mm & 0xFFFF0000) >> 16);
                *mask = (mm & 0x0000FFFF);
        }

        ChannelMode get_channel_mode() const {
                return static_cast<ChannelMode>((g_atomic_int_get(&_mode_mask) & 0xFFFF0000) >> 16);
        }

        uint16_t get_channel_mask() const {
                return g_atomic_int_get(&_mode_mask) & 0x0000FFFF;
        }

        PBD::Signal0<void> ChannelMaskChanged;
        PBD::Signal0<void> ChannelModeChanged;

private:
        uint32_t _mode_mask;  
};

} /* namespace ARDOUR */

#endif /* __ardour_channel_filter_h__ */