183 lines
4.9 KiB
C++
183 lines
4.9 KiB
C++
/*
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* Copyright (C) 2018-2021 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _ardour_convolver_h_
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#define _ardour_convolver_h_
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#include <vector>
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#include "zita-convolver/zita-convolver.h"
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#include "ardour/libardour_visibility.h"
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#include "ardour/buffer_set.h"
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#include "ardour/chan_mapping.h"
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#include "ardour/readable.h"
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namespace ARDOUR { namespace DSP {
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class LIBARDOUR_API Convolution : public SessionHandleRef
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{
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public:
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Convolution (Session&, uint32_t n_in, uint32_t n_out);
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virtual ~Convolution () {}
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bool add_impdata (
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uint32_t c_in,
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uint32_t c_out,
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boost::shared_ptr<AudioReadable> r,
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float gain = 1.0,
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uint32_t pre_delay = 0,
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sampleoffset_t offset = 0,
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samplecnt_t length = 0,
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uint32_t channel = 0);
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bool ready () const;
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uint32_t latency () const { return _n_samples; }
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uint32_t n_inputs () const { return _n_inputs; }
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uint32_t n_outputs () const { return _n_outputs; }
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void restart ();
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void run (BufferSet&, ChanMapping const&, ChanMapping const&, pframes_t, samplecnt_t);
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protected:
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ArdourZita::Convproc _convproc;
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uint32_t _n_samples;
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uint32_t _max_size;
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uint32_t _offset;
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bool _configured;
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bool _threaded;
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private:
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class ImpData : public AudioReadable
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{
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public:
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ImpData (uint32_t ci, uint32_t co, boost::shared_ptr<AudioReadable> r, float g, float d, sampleoffset_t s = 0, samplecnt_t l = 0, uint32_t c = 0)
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: c_in (ci)
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, c_out (co)
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, gain (g)
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, delay (d)
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, _readable (r)
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, _offset (s)
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, _length (l)
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, _channel (c)
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{}
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uint32_t c_in;
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uint32_t c_out;
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float gain;
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uint32_t delay;
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samplecnt_t read (Sample* s, samplepos_t pos, samplecnt_t cnt, int c = -1) const {
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return _readable->read (s, pos + _offset, cnt, _channel);
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}
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samplecnt_t readable_length_samples () const {
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samplecnt_t rl = _readable->readable_length_samples ();
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if (rl < _offset) {
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return 0;
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} else if (_length > 0) {
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return std::min (rl - _offset, _length);
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} else {
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return rl - _offset;
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}
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}
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uint32_t n_channels () const {
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return _readable->n_channels ();
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}
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private:
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boost::shared_ptr<AudioReadable> _readable;
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sampleoffset_t _offset;
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samplecnt_t _length;
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uint32_t _channel;
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};
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std::vector<ImpData> _impdata;
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uint32_t _n_inputs;
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uint32_t _n_outputs;
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};
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class LIBARDOUR_API Convolver : public Convolution
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{
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public:
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enum IRChannelConfig {
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Mono, ///< 1 in, 1 out; 1ch IR
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MonoToStereo, ///< 1 in, 2 out, stereo IR M -> L, M -> R
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Stereo, ///< 2 in, 2 out, stereo IR L -> L, R -> R || 4 chan IR L -> L, L -> R, R -> R, R -> L
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};
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static uint32_t ircc_in (IRChannelConfig irc) {
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return irc < Stereo ? 1 : 2;
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}
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static uint32_t ircc_out (IRChannelConfig irc) {
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return irc == Mono ? 1 : 2;
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}
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struct IRSettings {
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IRSettings ()
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{
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gain = 1.0;
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pre_delay = 0.0;
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channel_gain[0] = channel_gain[1] = channel_gain[2] = channel_gain[3] = 1.0;
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channel_delay[0] = channel_delay[1] = channel_delay[2] = channel_delay[3] = 0;
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};
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float gain;
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uint32_t pre_delay;
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float channel_gain[4];
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uint32_t channel_delay[4];
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/* convenient array accessors for Lua bindings */
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float get_channel_gain (unsigned i) const {
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if (i < 4) { return channel_gain[i]; }
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return 0;
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}
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void set_channel_gain (unsigned i, float g) {
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if (i < 4) { channel_gain[i] = g; }
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}
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uint32_t get_channel_delay (unsigned i) const {
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if (i < 4) { return channel_delay[i]; }
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return 0;
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}
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void set_channel_delay (unsigned i, uint32_t d) {
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if (i < 4) { channel_delay[i] = d; }
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}
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};
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Convolver (Session&, std::string const&, IRChannelConfig irc = Mono, IRSettings irs = IRSettings ());
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void run_mono_buffered (float*, uint32_t);
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void run_stereo_buffered (float* L, float* R, uint32_t);
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void run_mono_no_latency (float*, uint32_t);
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void run_stereo_no_latency (float* L, float* R, uint32_t);
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private:
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std::vector<boost::shared_ptr<AudioReadable> > _readables;
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IRChannelConfig _irc;
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IRSettings _ir_settings;
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};
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} } /* namespace */
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#endif
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