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/*
* Copyright (C) 2018 Robin Gareus <robin@gareus.org>
*
* 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_convolver_h_
#define _ardour_convolver_h_
#include <vector>
#include "zita-convolver/zita-convolver.h"
#include "ardour/libardour_visibility.h"
#include "ardour/readable.h"
namespace ARDOUR { namespace DSP {
class LIBARDOUR_API Convolver : public SessionHandleRef {
public:
enum IRChannelConfig {
Mono, ///< 1 in, 1 out; 1ch IR
MonoToStereo, ///< 1 in, 2 out, stereo IR M -> L, M -> R
Stereo, ///< 2 in, 2 out, stereo IR L -> L, R -> R || 4 chan IR L -> L, L -> R, R -> R, R -> L
};
struct IRSettings {
IRSettings () {
gain = 1.0;
pre_delay = 0.0;
channel_gain[0] = channel_gain[1] = channel_gain[2] = channel_gain[3] = 1.0;
channel_delay[0] = channel_delay[1] = channel_delay[2] = channel_delay[3] = 0;
};
float gain;
uint32_t pre_delay;
float channel_gain[4];
uint32_t channel_delay[4];
/* convenient array accessors for Lua bindings */
float get_channel_gain (unsigned i) const {
if (i < 4) { return channel_gain[i]; }
return 0;
}
void set_channel_gain (unsigned i, float g) {
if (i < 4) { channel_gain[i] = g; }
}
uint32_t get_channel_delay (unsigned i) const {
if (i < 4) { return channel_delay[i]; }
return 0;
}
void set_channel_delay (unsigned i, uint32_t d) {
if (i < 4) { channel_delay[i] = d; }
}
};
Convolver (Session&, std::string const&, IRChannelConfig irc = Mono, IRSettings irs = IRSettings ());
void run (float*, uint32_t);
void run_stereo (float* L, float* R, uint32_t);
uint32_t latency () const { return _n_samples; }
uint32_t n_inputs () const { return _irc < Stereo ? 1 : 2; }
uint32_t n_outputs () const { return _irc == Mono ? 1 : 2; }
bool ready () const;
private:
void reconfigure ();
std::vector<boost::shared_ptr<Readable> > _readables;
ArdourZita::Convproc _convproc;
IRChannelConfig _irc;
IRSettings _ir_settings;
uint32_t _n_samples;
uint32_t _max_size;
uint32_t _offset;
bool _configured;
};
} } /* namespace */
#endif
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