2 * Copyright (C) 2018 Robin Gareus <robin@gareus.org>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (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
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 #include "pbd/error.h"
23 #include "pbd/pthread_utils.h"
25 #include "ardour/audioengine.h"
26 #include "ardour/audiofilesource.h"
27 #include "ardour/convolver.h"
28 #include "ardour/session.h"
29 #include "ardour/srcfilesource.h"
30 #include "ardour/source_factory.h"
34 using namespace ARDOUR::DSP;
35 using namespace ArdourZita;
37 using ARDOUR::Session;
39 Convolver::Convolver (Session& session, std::string const& path, IRChannelConfig irc, uint32_t pre_delay)
40 : SessionHandleRef (session)
42 , _initial_delay (pre_delay)
48 ARDOUR::SoundFileInfo sf_info;
49 std::string error_msg;
51 if (!AudioFileSource::get_soundfile_info (path, sf_info, error_msg)) {
52 PBD::error << string_compose(_("Convolver: cannot open IR \"%1\": %2"), path, error_msg) << endmsg;
53 throw failed_constructor ();
56 if (sf_info.length > 0x1000000 /*2^24*/) {
57 PBD::error << string_compose(_("Convolver: IR \"%1\" file too long."), path) << endmsg;
58 throw failed_constructor ();
61 for (unsigned int n = 0; n < sf_info.channels; ++n) {
63 boost::shared_ptr<AudioFileSource> afs;
64 afs = boost::dynamic_pointer_cast<AudioFileSource> (
65 SourceFactory::createExternal (DataType::AUDIO, _session,
67 Source::Flag (ARDOUR::AudioFileSource::NoPeakFile), false));
69 if (afs->sample_rate() != _session.nominal_sample_rate()) {
70 boost::shared_ptr<SrcFileSource> sfs (new SrcFileSource(_session, afs, ARDOUR::SrcBest));
71 _readables.push_back(sfs);
73 _readables.push_back(afs);
75 } catch (failed_constructor& err) {
76 PBD::error << string_compose(_("Convolver: Could not open IR \"%1\"."), path) << endmsg;
77 throw failed_constructor ();
81 if (_readables.empty()) {
82 PBD::error << string_compose (_("Convolver: IR \"%1\" no usable audio-channels sound."), path) << endmsg;
83 throw failed_constructor ();
86 AudioEngine::instance ()->BufferSizeChanged.connect_same_thread (*this, boost::bind (&Convolver::reconfigure, this));
92 Convolver::reconfigure ()
94 _convproc.stop_process ();
96 _convproc.set_options (0);
98 assert (!_readables.empty());
101 _n_samples = _session.get_block_size();
102 _max_size = _readables[0]->readable_length();
104 uint32_t power_of_two;
105 for (power_of_two = 1; 1U << power_of_two < _n_samples; ++power_of_two);
106 _n_samples = 1 << power_of_two;
108 int n_part = std::min ((uint32_t)Convproc::MAXPART, 4 * _n_samples);
109 int rv = _convproc.configure (
111 /*out*/ n_outputs (),
112 /*max-convolution length */ _max_size,
113 /*quantum, nominal-buffersize*/ _n_samples,
114 /*Convproc::MINPART*/ _n_samples,
115 /*Convproc::MAXPART*/ n_part,
120 * always use first only
122 * mono-file: use 1st for M -> L, M -> R
123 * else: use first two channels
125 * mono-file: use 1st for both L -> L, R -> R, no x-over
126 * stereo-file: L -> L, R -> R -- no L/R, R/L x-over
127 * 3chan-file: ignore 3rd channel, use as stereo-file.
128 * 4chan file: L -> L, L -> R, R -> R, R -> L
131 uint32_t n_imp = n_inputs() * n_outputs ();
132 uint32_t n_chn = _readables.size();
134 if (_irc == Stereo && n_chn == 3) {
135 /* ignore 3rd channel */
138 if (_irc == Stereo && n_chn <= 2) {
143 for (uint32_t c = 0; c < n_imp && rv == 0; ++c) {
144 int ir_c = c % n_chn;
145 int io_o = c % n_outputs();
148 if (n_imp > n_chn && _irc == Stereo) {
150 * Stereo (2, 2, 2) 1: L -> L, 2: R -> R
152 io_i = c % n_inputs();
155 * Mono (1, 1, 1) 1: M -> M
156 * MonoToStereo (2, 1, 2) 1: M -> L, 2: M -> R
157 * Stereo (4, 2, 2) 1: L -> L, 2: L -> R, 3: R -> L, 4: R -> R
159 io_i = (c / n_outputs()) % n_inputs();
163 printf ("Convolver map: IR-chn %d: in %d -> out %d\n", ir_c + 1, io_i + 1, io_o + 1);
166 boost::shared_ptr<Readable> r = _readables[ir_c % n_chn];
167 assert (r->readable_length () == _max_size);
168 assert (r->n_channels () == 1);
173 samplecnt_t to_read = std::min ((uint32_t)8192, _max_size - pos);
174 samplecnt_t ns = r->read (ir, pos, to_read, 0);
177 assert (pos == _max_size);
181 rv = _convproc.impdata_create (
182 /*i/o map */ io_i, io_o,
183 /*stride, de-interleave */1,
185 _initial_delay + pos, _initial_delay + pos + ns);
193 if (pos == _max_size) {
200 rv = _convproc.start_process (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority() - 2), PBD_SCHED_FIFO);
203 assert (rv == 0); // bail out in debug builds
206 _convproc.stop_process ();
207 _convproc.cleanup ();
215 _convproc.print (stdout);
220 Convolver::ready () const {
221 return _configured && _convproc.state () == Convproc::ST_PROC;
225 Convolver::run (float* buf, uint32_t n_samples)
227 assert (_convproc.state () == Convproc::ST_PROC);
228 assert (_irc == Mono);
231 uint32_t remain = n_samples;
234 uint32_t ns = std::min (remain, _n_samples - _offset);
236 float* const in = _convproc.inpdata (/*channel*/0);
237 float const* const out = _convproc.outdata (/*channel*/0);
239 memcpy (&in[_offset], &buf[done], sizeof (float) * ns);
240 memcpy (&buf[done], &out[_offset], sizeof (float) * ns);
246 if (_offset == _n_samples) {
247 _convproc.process (/*sync, freewheeling*/ true);
254 Convolver::run_stereo (float* left, float* right, uint32_t n_samples)
256 assert (_convproc.state () == Convproc::ST_PROC);
257 assert (_irc != Mono);
260 uint32_t remain = n_samples;
263 uint32_t ns = std::min (remain, _n_samples - _offset);
265 memcpy (&_convproc.inpdata(0)[_offset], &left[done], sizeof (float) * ns);
266 if (_irc >= Stereo) {
267 memcpy (&_convproc.inpdata(1)[_offset], &right[done], sizeof (float) * ns);
269 memcpy (&left[done], &_convproc.outdata(0)[_offset], sizeof (float) * ns);
270 memcpy (&right[done], &_convproc.outdata(1)[_offset], sizeof (float) * ns);
276 if (_offset == _n_samples) {
277 _convproc.process (true);