2 * Copyright (C) 2018-2019 Robin Gareus <robin@gareus.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "pbd/error.h"
22 #include "pbd/pthread_utils.h"
24 #include "ardour/audioengine.h"
25 #include "ardour/audiofilesource.h"
26 #include "ardour/convolver.h"
27 #include "ardour/session.h"
28 #include "ardour/srcfilesource.h"
29 #include "ardour/source_factory.h"
33 using namespace ARDOUR::DSP;
34 using namespace ArdourZita;
36 using ARDOUR::Session;
38 Convolver::Convolver (
40 std::string const& path,
43 : SessionHandleRef (session)
51 ARDOUR::SoundFileInfo sf_info;
52 std::string error_msg;
54 if (!AudioFileSource::get_soundfile_info (path, sf_info, error_msg)) {
55 PBD::error << string_compose(_("Convolver: cannot open IR \"%1\": %2"), path, error_msg) << endmsg;
56 throw failed_constructor ();
59 if (sf_info.length > 0x1000000 /*2^24*/) {
60 PBD::error << string_compose(_("Convolver: IR \"%1\" file too long."), path) << endmsg;
61 throw failed_constructor ();
64 for (unsigned int n = 0; n < sf_info.channels; ++n) {
66 boost::shared_ptr<AudioFileSource> afs;
67 afs = boost::dynamic_pointer_cast<AudioFileSource> (
68 SourceFactory::createExternal (DataType::AUDIO, _session,
70 Source::Flag (ARDOUR::AudioFileSource::NoPeakFile), false));
72 if (afs->sample_rate() != _session.nominal_sample_rate()) {
73 boost::shared_ptr<SrcFileSource> sfs (new SrcFileSource(_session, afs, ARDOUR::SrcBest));
74 _readables.push_back(sfs);
76 _readables.push_back (afs);
78 } catch (failed_constructor& err) {
79 PBD::error << string_compose(_("Convolver: Could not open IR \"%1\"."), path) << endmsg;
80 throw failed_constructor ();
84 if (_readables.empty ()) {
85 PBD::error << string_compose (_("Convolver: IR \"%1\" no usable audio-channels sound."), path) << endmsg;
86 throw failed_constructor ();
89 AudioEngine::instance ()->BufferSizeChanged.connect_same_thread (*this, boost::bind (&Convolver::reconfigure, this));
95 Convolver::reconfigure ()
97 _convproc.stop_process ();
99 _convproc.set_options (0);
101 assert (!_readables.empty ());
104 _n_samples = _session.get_block_size ();
105 _max_size = _readables[0]->readable_length ();
107 uint32_t power_of_two;
108 for (power_of_two = 1; 1U << power_of_two < _n_samples; ++power_of_two) ;
109 _n_samples = 1 << power_of_two;
111 int n_part = std::min ((uint32_t)Convproc::MAXPART, 4 * _n_samples);
112 int rv = _convproc.configure (
114 /*out*/ n_outputs (),
115 /*max-convolution length */ _max_size,
116 /*quantum, nominal-buffersize*/ _n_samples,
117 /*Convproc::MINPART*/ _n_samples,
118 /*Convproc::MAXPART*/ n_part,
123 * always use first only
125 * mono-file: use 1st for M -> L, M -> R
126 * else: use first two channels
128 * mono-file: use 1st for both L -> L, R -> R, no x-over
129 * stereo-file: L -> L, R -> R -- no L/R, R/L x-over
130 * 3chan-file: ignore 3rd channel, use as stereo-file.
131 * 4chan file: L -> L, L -> R, R -> R, R -> L
134 uint32_t n_imp = n_inputs () * n_outputs ();
135 uint32_t n_chn = _readables.size ();
137 if (_irc == Stereo && n_chn == 3) {
138 /* ignore 3rd channel */
141 if (_irc == Stereo && n_chn <= 2) {
147 printf ("Convolver::reconfigure Nin=%d Nout=%d Nimp=%d Nchn=%d\n", n_inputs (), n_outputs (), n_imp, n_chn);
152 for (uint32_t c = 0; c < n_imp && rv == 0; ++c) {
153 int ir_c = c % n_chn;
154 int io_o = c % n_outputs ();
157 if (n_imp == 2 && _irc == Stereo) {
159 * Stereo (2, 2, 2) 1: L -> L, 2: R -> R
161 io_i = c % n_inputs ();
164 * Mono (1, 1, 1) 1: M -> M
165 * MonoToStereo (2, 1, 2) 1: M -> L, 2: M -> R
166 * Stereo (4, 2, 2) 1: L -> L, 2: L -> R, 3: R -> L, 4: R -> R
168 io_i = (c / n_outputs ()) % n_inputs ();
172 boost::shared_ptr<Readable> r = _readables[ir_c];
173 assert (r->readable_length () == _max_size);
174 assert (r->n_channels () == 1);
176 const float chan_gain = _ir_settings.gain * _ir_settings.channel_gain[c];
177 const uint32_t chan_delay = _ir_settings.pre_delay + _ir_settings.channel_delay[c];
180 printf ("Convolver map: IR-chn %d: in %d -> out %d (gain: %.1fdB delay; %d)\n", ir_c + 1, io_i + 1, io_o + 1, 20.f * log10f (chan_gain), chan_delay);
187 samplecnt_t to_read = std::min ((uint32_t)8192, _max_size - pos);
188 samplecnt_t ns = r->read (ir, pos, to_read, 0);
191 assert (pos == _max_size);
195 if (chan_gain != 1.f) {
196 for (samplecnt_t i = 0; i < ns; ++i) {
201 rv = _convproc.impdata_create (
202 /*i/o map */ io_i, io_o,
203 /*stride, de-interleave */ 1,
205 chan_delay + pos, chan_delay + pos + ns);
213 if (pos == _max_size) {
220 rv = _convproc.start_process (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority() - 2), PBD_SCHED_FIFO);
223 assert (rv == 0); // bail out in debug builds
226 _convproc.stop_process ();
227 _convproc.cleanup ();
235 _convproc.print (stdout);
240 Convolver::ready () const
242 return _configured && _convproc.state () == Convproc::ST_PROC;
246 Convolver::run (float* buf, uint32_t n_samples)
248 assert (_convproc.state () == Convproc::ST_PROC);
249 assert (_irc == Mono);
252 uint32_t remain = n_samples;
255 uint32_t ns = std::min (remain, _n_samples - _offset);
257 float* const in = _convproc.inpdata (/*channel*/ 0);
258 float const* const out = _convproc.outdata (/*channel*/ 0);
260 memcpy (&in[_offset], &buf[done], sizeof (float) * ns);
261 memcpy (&buf[done], &out[_offset], sizeof (float) * ns);
267 if (_offset == _n_samples) {
268 _convproc.process (/*sync, freewheeling*/ true);
275 Convolver::run_stereo (float* left, float* right, uint32_t n_samples)
277 assert (_convproc.state () == Convproc::ST_PROC);
278 assert (_irc != Mono);
281 uint32_t remain = n_samples;
284 uint32_t ns = std::min (remain, _n_samples - _offset);
286 memcpy (&_convproc.inpdata (0)[_offset], &left[done], sizeof (float) * ns);
287 if (_irc >= Stereo) {
288 memcpy (&_convproc.inpdata (1)[_offset], &right[done], sizeof (float) * ns);
290 memcpy (&left[done], &_convproc.outdata (0)[_offset], sizeof (float) * ns);
291 memcpy (&right[done], &_convproc.outdata (1)[_offset], sizeof (float) * ns);
297 if (_offset == _n_samples) {
298 _convproc.process (true);