99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2015 David Robillard <d@drobilla.net>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __ardour_channel_filter_h__
|
|
#define __ardour_channel_filter_h__
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <glib.h>
|
|
|
|
#include "pbd/signals.h"
|
|
#include "pbd/g_atomic_compat.h"
|
|
|
|
#include "ardour/types.h"
|
|
|
|
namespace ARDOUR
|
|
{
|
|
|
|
class BufferSet;
|
|
|
|
/** Filter/mapper for MIDI channels.
|
|
*
|
|
* Channel mapping is configured by setting a mode and "mask", where the
|
|
* meaning of the mask depends on the mode.
|
|
*
|
|
* If mode is FilterChannels, each mask bit represents a midi channel (bit 0 =
|
|
* channel 0, bit 1 = channel 1, ...). Only events whose channel corresponds
|
|
* to a 1 bit will be passed.
|
|
*
|
|
* If mode is ForceChannel, mask is simply a channel number which all events
|
|
* will be forced to.
|
|
*/
|
|
class LIBARDOUR_API MidiChannelFilter
|
|
{
|
|
public:
|
|
MidiChannelFilter();
|
|
|
|
/** Filter `bufs` in-place. */
|
|
void filter(BufferSet& bufs);
|
|
|
|
/** Filter/map a MIDI message by channel.
|
|
*
|
|
* May modify the channel in `buf` if necessary.
|
|
*
|
|
* @return true if this event should be filtered out.
|
|
*/
|
|
bool filter(uint8_t* buf, uint32_t len);
|
|
|
|
/** Atomically set the channel mode and corresponding mask.
|
|
* @return true iff configuration changed.
|
|
*/
|
|
bool set_channel_mode(ChannelMode mode, uint16_t mask);
|
|
|
|
/** Atomically set the channel mask for the current mode.
|
|
* @return true iff configuration changed.
|
|
*/
|
|
bool set_channel_mask(uint16_t mask);
|
|
|
|
/** Atomically get both the channel mode and mask. */
|
|
void get_mode_and_mask(ChannelMode* mode, uint16_t* mask) const {
|
|
const uint32_t mm = g_atomic_int_get (const_cast<GATOMIC_QUAL guint*> (&_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 (const_cast<GATOMIC_QUAL guint*> (&_mode_mask)) & 0xFFFF0000) >> 16);
|
|
}
|
|
|
|
uint16_t get_channel_mask() const {
|
|
return g_atomic_int_get (const_cast<GATOMIC_QUAL guint*> (&_mode_mask)) & 0x0000FFFF;
|
|
}
|
|
|
|
PBD::Signal0<void> ChannelMaskChanged;
|
|
PBD::Signal0<void> ChannelModeChanged;
|
|
|
|
private:
|
|
GATOMIC_QUAL uint32_t _mode_mask; ///< 16 bits mode, 16 bits mask
|
|
};
|
|
|
|
} /* namespace ARDOUR */
|
|
|
|
#endif /* __ardour_channel_filter_h__ */
|