--- /dev/null
+/*
+ * 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
+ };
+
+ Convolver (Session&, std::string const&, IRChannelConfig irc = Mono, uint32_t pre_delay = 0);
+
+ 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;
+ uint32_t _initial_delay;
+
+ uint32_t _n_samples;
+ uint32_t _max_size;
+ uint32_t _offset;
+ bool _configured;
+};
+
+} } /* namespace */
+#endif
--- /dev/null
+/*
+ * 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.
+ *
+ */
+
+#include <assert.h>
+
+#include "pbd/error.h"
+#include "pbd/pthread_utils.h"
+
+#include "ardour/audioengine.h"
+#include "ardour/audiofilesource.h"
+#include "ardour/convolver.h"
+#include "ardour/session.h"
+#include "ardour/srcfilesource.h"
+#include "ardour/source_factory.h"
+
+#include "pbd/i18n.h"
+
+using namespace ARDOUR::DSP;
+using namespace ArdourZita;
+
+Convolver::Convolver (Session& session, std::string const& path, IRChannelConfig irc, uint32_t pre_delay)
+ : SessionHandleRef (session)
+ , _irc (irc)
+ , _initial_delay (pre_delay)
+ , _n_samples (0)
+ , _max_size (0)
+ , _offset (0)
+ , _configured (false)
+{
+ ARDOUR::SoundFileInfo sf_info;
+ std::string error_msg;
+
+ if (!AudioFileSource::get_soundfile_info (path, sf_info, error_msg)) {
+ PBD::error << string_compose(_("Convolver: cannot open IR \"%1\": %2"), path, error_msg) << endmsg;
+ throw failed_constructor ();
+ }
+
+ if (sf_info.length > 0x1000000 /*2^24*/) {
+ PBD::error << string_compose(_("Convolver: IR \"%1\" file too long."), path) << endmsg;
+ throw failed_constructor ();
+ }
+
+ for (unsigned int n = 0; n < sf_info.channels; ++n) {
+ try {
+ boost::shared_ptr<AudioFileSource> afs;
+ afs = boost::dynamic_pointer_cast<AudioFileSource> (
+ SourceFactory::createExternal (DataType::AUDIO, _session,
+ path, n,
+ Source::Flag (ARDOUR::AudioFileSource::NoPeakFile), false));
+
+ if (afs->sample_rate() != _session.nominal_sample_rate()) {
+ boost::shared_ptr<SrcFileSource> sfs (new SrcFileSource(_session, afs, ARDOUR::SrcBest));
+ _readables.push_back(sfs);
+ } else {
+ _readables.push_back(afs);
+ }
+ } catch (failed_constructor& err) {
+ PBD::error << string_compose(_("Convolver: Could not open IR \"%1\"."), path) << endmsg;
+ throw failed_constructor ();
+ }
+ }
+
+ if (_readables.empty()) {
+ PBD::error << string_compose (_("Convolver: IR \"%1\" no usable audio-channels sound."), path) << endmsg;
+ throw failed_constructor ();
+ }
+
+ AudioEngine::instance ()->BufferSizeChanged.connect_same_thread (*this, boost::bind (&Convolver::reconfigure, this));
+
+ reconfigure ();
+}
+
+void
+Convolver::reconfigure ()
+{
+ _convproc.stop_process ();
+ _convproc.cleanup ();
+ _convproc.set_options (0);
+
+ assert (!_readables.empty());
+
+ _offset = 0;
+ _n_samples = _session.get_block_size();
+ _max_size = _readables[0]->readable_length();
+
+ uint32_t power_of_two;
+ for (power_of_two = 1; 1U << power_of_two < _n_samples; ++power_of_two);
+ _n_samples = 1 << power_of_two;
+
+ int n_part = std::min ((uint32_t)Convproc::MAXPART, 4 * _n_samples);
+ int rv = _convproc.configure (
+ /*in*/ n_inputs (),
+ /*out*/ n_outputs (),
+ /*max-convolution length */ _max_size,
+ /*quantum, nominal-buffersize*/ _n_samples,
+ /*Convproc::MINPART*/ _n_samples,
+ /*Convproc::MAXPART*/ n_part,
+ /*density*/ 0);
+
+ /* map channels
+ * - Mono:
+ * always use first only
+ * - MonoToStereo:
+ * mono-file: use 1st for M -> L, M -> R
+ * else: use first two channels
+ * - Stereo
+ * mono-file: use 1st for both L -> L, R -> R, no x-over
+ * stereo-file: L -> L, R -> R -- no L/R, R/L x-over
+ * 3chan-file: ignore 3rd channel, use as stereo-file.
+ * 4chan file: L -> L, L -> R, R -> R, R -> L
+ */
+
+ uint32_t n_imp = n_inputs() * n_outputs ();
+ uint32_t n_chn = _readables.size();
+
+ if (_irc == Stereo && n_chn == 3) {
+ /* ignore 3rd channel */
+ n_chn = 2;
+ }
+ if (_irc == Stereo && n_chn <= 2) {
+ /* ignore x-over */
+ n_imp = 2;
+ }
+
+ for (uint32_t c = 0; c < n_imp && rv == 0; ++c) {
+ int ir_c = c % n_chn;
+ int io_o = c % n_outputs();
+ int io_i;
+
+ if (n_imp > n_chn && _irc == Stereo) {
+ /* (imp, in, out)
+ * Stereo (2, 2, 2) 1: L -> L, 2: R -> R
+ */
+ io_i = c % n_inputs();
+ } else {
+ /* (imp, in, out)
+ * Mono (1, 1, 1) 1: M -> M
+ * MonoToStereo (2, 1, 2) 1: M -> L, 2: M -> R
+ * Stereo (4, 2, 2) 1: L -> L, 2: L -> R, 3: R -> L, 4: R -> R
+ */
+ io_i = (c / n_outputs()) % n_inputs();
+ }
+
+#ifndef NDEBUG
+ printf ("Convolver map: IR-chn %d: in %d -> out %d\n", ir_c + 1, io_i + 1, io_o + 1);
+#endif
+
+ boost::shared_ptr<Readable> r = _readables[ir_c % n_chn];
+ assert (r->readable_length () == _max_size);
+ assert (r->n_channels () == 1);
+
+ uint32_t pos = 0;
+ while (true) {
+ float ir[8192];
+ samplecnt_t to_read = std::min ((uint32_t)8192, _max_size - pos);
+ samplecnt_t ns = r->read (ir, pos, to_read, 0);
+
+ if (ns == 0) {
+ assert (pos == _max_size);
+ break;
+ }
+
+ rv = _convproc.impdata_create (
+ /*i/o map */ io_i, io_o,
+ /*stride, de-interleave */1,
+ ir,
+ _initial_delay + pos, _initial_delay + pos + ns);
+
+ if (rv != 0) {
+ break;
+ }
+
+ pos += ns;
+
+ if (pos == _max_size) {
+ break;
+ }
+ };
+ }
+
+ if (rv == 0) {
+ rv = _convproc.start_process (pbd_absolute_rt_priority (PBD_SCHED_FIFO, AudioEngine::instance()->client_real_time_priority() - 2), PBD_SCHED_FIFO);
+ }
+
+ assert (rv == 0); // bail out in debug builds
+
+ if (rv != 0) {
+ _convproc.stop_process ();
+ _convproc.cleanup ();
+ _configured = false;
+ return;
+ }
+
+ _configured = true;
+
+#ifndef NDEBUG
+ _convproc.print (stdout);
+#endif
+}
+
+bool
+Convolver::ready () const {
+ return _configured && _convproc.state () == Convproc::ST_PROC;
+}
+
+void
+Convolver::run (float* buf, uint32_t n_samples)
+{
+ assert (_convproc.state () == Convproc::ST_PROC);
+ assert (_irc == Mono);
+
+ uint32_t done = 0;
+ uint32_t remain = n_samples;
+
+ while (remain > 0) {
+ uint32_t ns = std::min (remain, _n_samples - _offset);
+
+ float* const in = _convproc.inpdata (/*channel*/0);
+ float const* const out = _convproc.outdata (/*channel*/0);
+
+ memcpy (&in[_offset], &buf[done], sizeof (float) * ns);
+ memcpy (&buf[done], &out[_offset], sizeof (float) * ns);
+
+ _offset += ns;
+ done += ns;
+ remain -= ns;
+
+ if (_offset == _n_samples) {
+ _convproc.process (/*sync, freewheeling*/ true);
+ _offset = 0;
+ }
+ }
+}
+
+void
+Convolver::run_stereo (float* left, float* right, uint32_t n_samples)
+{
+ assert (_convproc.state () == Convproc::ST_PROC);
+ assert (_irc != Mono);
+
+ uint32_t done = 0;
+ uint32_t remain = n_samples;
+
+ while (remain > 0) {
+ uint32_t ns = std::min (remain, _n_samples - _offset);
+
+ memcpy (&_convproc.inpdata(0)[_offset], &left[done], sizeof (float) * ns);
+ if (_irc >= Stereo) {
+ memcpy (&_convproc.inpdata(1)[_offset], &right[done], sizeof (float) * ns);
+ }
+ memcpy (&left[done], &_convproc.outdata(0)[_offset], sizeof (float) * ns);
+ memcpy (&right[done], &_convproc.outdata(1)[_offset], sizeof (float) * ns);
+
+ _offset += ns;
+ done += ns;
+ remain -= ns;
+
+ if (_offset == _n_samples) {
+ _convproc.process (true);
+ _offset = 0;
+ }
+ }
+}
projects / ardour.git / commitdiff