X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Famp.cc;h=d5b9f56ca5f932a7ddc67eaeada5668815c1e2e5;hb=6894f468d4e5fcd6624368f7a7f820a9fcaa4455;hp=cc63353886214cfc953d7e04bf985dde9ce63496;hpb=f41149628955fc8145bef6db0c110b71664c0a3a;p=ardour.git diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index cc63353886..d5b9f56ca5 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -1,16 +1,16 @@ /* - Copyright (C) 2006 Paul Davis - + Copyright (C) 2006 Paul Davis + 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., 675 Mass Ave, Cambridge, MA 02139, USA. @@ -26,35 +26,35 @@ #include "ardour/amp.h" #include "ardour/audio_buffer.h" #include "ardour/buffer_set.h" -#include "ardour/configuration.h" -#include "ardour/io.h" -#include "ardour/mute_master.h" +#include "ardour/gain_control.h" +#include "ardour/midi_buffer.h" +#include "ardour/rc_configuration.h" #include "ardour/session.h" #include "i18n.h" using namespace ARDOUR; +using namespace PBD; -Amp::Amp(Session& s, boost::shared_ptr mm) +// used for low-pass filter denormal protection +#define GAIN_COEFF_TINY (1e-10) // -200dB + +Amp::Amp (Session& s, const std::string& name, boost::shared_ptr gc, bool control_midi_also) : Processor(s, "Amp") , _apply_gain(true) , _apply_gain_automation(false) - , _current_gain(1.0) - , _mute_master (mm) + , _current_gain(GAIN_COEFF_ZERO) + , _current_automation_frame (INT64_MAX) + , _gain_control (gc) + , _gain_automation_buffer(0) + , _midi_amp (control_midi_also) { - boost::shared_ptr gl(new AutomationList(Evoral::Parameter(GainAutomation))); - _gain_control = boost::shared_ptr( new GainControl(X_("gaincontrol"), s, this, Evoral::Parameter(GainAutomation), gl )); - add_control(_gain_control); -} - -std::string -Amp::display_name() const -{ - return _("Fader"); + set_display_name (name); + add_control (_gain_control); } bool -Amp::can_support_io_configuration (const ChanCount& in, ChanCount& out) const +Amp::can_support_io_configuration (const ChanCount& in, ChanCount& out) { out = in; return true; @@ -66,164 +66,272 @@ Amp::configure_io (ChanCount in, ChanCount out) if (out != in) { // always 1:1 return false; } - + return Processor::configure_io (in, out); } void -Amp::run (BufferSet& bufs, sframes_t start_frame, sframes_t end_frame, nframes_t nframes) +Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool) { - gain_t mute_gain; - if (!_active && !_pending_active) { return; } - if (_mute_master) { - mute_gain = _mute_master->mute_gain_at (MuteMaster::PreFader); - } else { - mute_gain = 1.0; - } - if (_apply_gain) { - + if (_apply_gain_automation) { - - gain_t* gab = _session.gain_automation_buffer (); - if (mute_gain == 0.0) { - - /* absolute mute */ + gain_t* gab = _gain_automation_buffer; + assert (gab); + + if (_midi_amp) { + for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { + MidiBuffer& mb (*i); + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + assert(ev.time() >= 0 && ev.time() < nframes); + ev.scale_velocity (fabsf (gab[ev.time()])); + } + } + } + } - if (_current_gain == 0.0) { - - /* already silent */ - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - i->clear (); - } - } else { - - /* cut to silence */ + const double a = 156.825 / _session.nominal_frame_rate(); // 25 Hz LPF; see Amp::apply_gain for details + double lpf = _current_gain; - Amp::apply_gain (bufs, nframes, _current_gain, 0.0); - _current_gain = 0.0; + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + Sample* const sp = i->data(); + lpf = _current_gain; + for (pframes_t nx = 0; nx < nframes; ++nx) { + sp[nx] *= lpf; + lpf += a * (gab[nx] - lpf); } - + } - } else if (mute_gain != 1.0) { + if (fabs (lpf) < GAIN_COEFF_TINY) { + _current_gain = GAIN_COEFF_ZERO; + } else { + _current_gain = lpf; + } - /* mute dimming */ + } else { /* manual (scalar) gain */ - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - Sample* const sp = i->data(); - for (nframes_t nx = 0; nx < nframes; ++nx) { - sp[nx] *= gab[nx] * mute_gain; - } - } + gain_t const dg = _gain_control->user_double(); - _current_gain = gab[nframes-1] * mute_gain; + if (_current_gain != dg) { - } else { + _current_gain = Amp::apply_gain (bufs, _session.nominal_frame_rate(), nframes, _current_gain, dg, _midi_amp); - /* no mute */ + } else if (_current_gain != GAIN_COEFF_UNITY) { - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - Sample* const sp = i->data(); - for (nframes_t nx = 0; nx < nframes; ++nx) { - sp[nx] *= gab[nx]; - } - } + /* gain has not changed, but its non-unity */ - _current_gain = gab[nframes-1]; - } - - - } else { /* manual (scalar) gain */ + if (_midi_amp) { + /* don't Trim midi velocity -- only relevant for Midi on Audio tracks */ + for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { - gain_t dg = _gain_control->user_float() * mute_gain; - - if (_current_gain != dg) { - - Amp::apply_gain (bufs, nframes, _current_gain, dg); - _current_gain = dg; - - } else if (_current_gain != 1.0f) { - - /* gain has not changed, but its non-unity - */ + MidiBuffer& mb (*i); + + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + ev.scale_velocity (fabsf (_current_gain)); + } + } + } + } for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { apply_gain_to_buffer (i->data(), nframes, _current_gain); } - } + } } } _active = _pending_active; } -void -Amp::apply_gain (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target) +gain_t +Amp::apply_gain (BufferSet& bufs, framecnt_t sample_rate, framecnt_t nframes, gain_t initial, gain_t target, bool midi_amp) { - /** Apply a (potentially) declicked gain to the audio buffers of @a bufs - */ - - if (nframes == 0 || bufs.count().n_audio() == 0) { - return; + /** Apply a (potentially) declicked gain to the buffers of @a bufs */ + gain_t rv = target; + + if (nframes == 0 || bufs.count().n_total() == 0) { + return initial; } // if we don't need to declick, defer to apply_simple_gain if (initial == target) { apply_simple_gain (bufs, nframes, target); + return target; + } + + /* MIDI Gain */ + if (midi_amp) { + /* don't Trim midi velocity -- only relevant for Midi on Audio tracks */ + for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { + + gain_t delta; + if (target < initial) { + /* fade out: remove more and more of delta from initial */ + delta = -(initial - target); + } else { + /* fade in: add more and more of delta from initial */ + delta = target - initial; + } + + MidiBuffer& mb (*i); + + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + + if (ev.is_note_on()) { + const gain_t scale = delta * (ev.time()/(double) nframes); + ev.scale_velocity (fabsf (initial+scale)); + } + } + } + } + + /* Audio Gain */ + + /* Low pass filter coefficient: 1.0 - e^(-2.0 * π * f / 48000) f in Hz. + * for f << SR, approx a ~= 6.2 * f / SR; + */ + const double a = 156.825 / sample_rate; // 25 Hz LPF + + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + Sample* const buffer = i->data(); + double lpf = initial; + + for (pframes_t nx = 0; nx < nframes; ++nx) { + buffer[nx] *= lpf; + lpf += a * (target - lpf); + } + if (i == bufs.audio_begin()) { + rv = lpf; + } + } + if (fabsf (rv - target) < GAIN_COEFF_TINY) return target; + if (fabsf (rv) < GAIN_COEFF_TINY) return GAIN_COEFF_ZERO; + return rv; +} + +void +Amp::declick (BufferSet& bufs, framecnt_t nframes, int dir) +{ + if (nframes == 0 || bufs.count().n_total() == 0) { return; } - const nframes_t declick = std::min ((nframes_t)128, nframes); - gain_t delta; - double fractional_shift = -1.0/declick; - double fractional_pos; - gain_t polscale = 1.0f; + const framecnt_t declick = std::min ((framecnt_t) 512, nframes); + const double fractional_shift = 1.0 / declick ; + gain_t delta, initial; - if (target < initial) { + if (dir < 0) { /* fade out: remove more and more of delta from initial */ - delta = -(initial - target); + delta = -1.0; + initial = GAIN_COEFF_UNITY; } else { /* fade in: add more and more of delta from initial */ - delta = target - initial; + delta = 1.0; + initial = GAIN_COEFF_ZERO; } + /* Audio Gain */ for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { Sample* const buffer = i->data(); - fractional_pos = 1.0; + double fractional_pos = 0.0; - for (nframes_t nx = 0; nx < declick; ++nx) { - buffer[nx] *= polscale * (initial + (delta * (0.5 + 0.5 * cos (M_PI * fractional_pos)))); + for (pframes_t nx = 0; nx < declick; ++nx) { + buffer[nx] *= initial + (delta * fractional_pos); fractional_pos += fractional_shift; } - + /* now ensure the rest of the buffer has the target value applied, if necessary. */ - if (declick != nframes) { - - if (target == 0.0) { - memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick)); - } else if (target != 1.0) { - apply_gain_to_buffer (&buffer[declick], nframes - declick, target); + if (dir < 0) { + memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick)); } } } } + +gain_t +Amp::apply_gain (AudioBuffer& buf, framecnt_t sample_rate, framecnt_t nframes, gain_t initial, gain_t target) +{ + /* Apply a (potentially) declicked gain to the contents of @a buf + * -- used by MonitorProcessor::run() + */ + + if (nframes == 0) { + return initial; + } + + // if we don't need to declick, defer to apply_simple_gain + if (initial == target) { + apply_simple_gain (buf, nframes, target); + return target; + } + + Sample* const buffer = buf.data(); + const double a = 156.825 / sample_rate; // 25 Hz LPF, see [other] Amp::apply_gain() above for details + + double lpf = initial; + for (pframes_t nx = 0; nx < nframes; ++nx) { + buffer[nx] *= lpf; + lpf += a * (target - lpf); + } + + if (fabs (lpf - target) < GAIN_COEFF_TINY) return target; + if (fabs (lpf) < GAIN_COEFF_TINY) return GAIN_COEFF_ZERO; + return lpf; +} + void -Amp::apply_simple_gain (BufferSet& bufs, nframes_t nframes, gain_t target) +Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target, bool midi_amp) { - if (target == 0.0) { + if (fabsf (target) < GAIN_COEFF_SMALL) { + + if (midi_amp) { + /* don't Trim midi velocity -- only relevant for Midi on Audio tracks */ + for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { + MidiBuffer& mb (*i); + + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + ev.set_velocity (0); + } + } + } + } + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { memset (i->data(), 0, sizeof (Sample) * nframes); } - } else if (target != 1.0) { + + } else if (target != GAIN_COEFF_UNITY) { + + if (midi_amp) { + /* don't Trim midi velocity -- only relevant for Midi on Audio tracks */ + for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { + MidiBuffer& mb (*i); + + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + ev.scale_velocity (fabsf (target)); + } + } + } + } + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { apply_gain_to_buffer (i->data(), nframes, target); } @@ -231,98 +339,62 @@ Amp::apply_simple_gain (BufferSet& bufs, nframes_t nframes, gain_t target) } void -Amp::inc_gain (gain_t factor, void *src) -{ - float desired_gain = _gain_control->user_float(); - - if (desired_gain == 0.0f) { - set_gain (0.000001f + (0.000001f * factor), src); - } else { - set_gain (desired_gain + (desired_gain * factor), src); - } -} - -void -Amp::set_gain (gain_t val, void *src) +Amp::apply_simple_gain (AudioBuffer& buf, framecnt_t nframes, gain_t target) { - // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05)) - if (val > 1.99526231f) { - val = 1.99526231f; + if (fabsf (target) < GAIN_COEFF_SMALL) { + memset (buf.data(), 0, sizeof (Sample) * nframes); + } else if (target != GAIN_COEFF_UNITY) { + apply_gain_to_buffer (buf.data(), nframes, target); } - - //cerr << "set desired gain to " << val << " when curgain = " << _gain_control->get_value () << endl; - - if (src != _gain_control.get()) { - _gain_control->set_value (val); - // bit twisty, this will come back and call us again - // (this keeps control in sync with reality) - return; - } - - _gain_control->set_float(val, false); - _session.set_dirty(); } XMLNode& Amp::state (bool full_state) { XMLNode& node (Processor::state (full_state)); - node.add_property("type", "amp"); - - char buf[32]; - snprintf (buf, sizeof (buf), "%2.12f", _gain_control->get_value()); - node.add_property("gain", buf); + node.add_property("type", _gain_control->parameter().type() == GainAutomation ? "amp" : "trim"); + node.add_child_nocopy (_gain_control->get_state()); return node; } int -Amp::set_state (const XMLNode& node) +Amp::set_state (const XMLNode& node, int version) { - const XMLProperty* prop; - - Processor::set_state (node); - prop = node.property ("gain"); + XMLNode* gain_node; - if (prop) { - gain_t val; + Processor::set_state (node, version); - if (sscanf (prop->value().c_str(), "%f", &val) == 1) { - _gain_control->set_value (val); - } - } + if ((gain_node = node.child (Controllable::xml_node_name.c_str())) != 0) { + _gain_control->set_state (*gain_node, version); + } return 0; } +/** Write gain automation for this cycle into the buffer previously passed in to + * set_gain_automation_buffer (if we are in automation playback mode and the + * transport is rolling). + */ void -Amp::GainControl::set_value (float val) +Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framecnt_t nframes) { - // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05)) - if (val > 1.99526231f) - val = 1.99526231f; + Glib::Threads::Mutex::Lock am (control_lock(), Glib::Threads::TRY_LOCK); - _amp->set_gain (val, this); - - AutomationControl::set_value(val); -} - -float -Amp::GainControl::get_value (void) const -{ - return AutomationControl::get_value(); -} - -void -Amp::setup_gain_automation (sframes_t start_frame, sframes_t end_frame, nframes_t nframes) -{ - Glib::Mutex::Lock am (data().control_lock(), Glib::TRY_LOCK); - - if (am.locked() && _session.transport_rolling() && _gain_control->automation_playback()) { + if (am.locked() + && (_session.transport_rolling() || _session.bounce_processing()) + && _gain_control->automation_playback()) + { + assert (_gain_automation_buffer); _apply_gain_automation = _gain_control->list()->curve().rt_safe_get_vector ( - start_frame, end_frame, _session.gain_automation_buffer(), nframes); + start_frame, end_frame, _gain_automation_buffer, nframes); + if (start_frame != _current_automation_frame) { + _current_gain = _gain_automation_buffer[0]; + } + _current_automation_frame = end_frame; } else { _apply_gain_automation = false; + _current_automation_frame = INT64_MAX; } } @@ -331,3 +403,26 @@ Amp::visible() const { return true; } + +std::string +Amp::value_as_string (boost::shared_ptr ac) const +{ + if (ac == _gain_control) { + char buffer[32]; + snprintf (buffer, sizeof (buffer), _("%.2fdB"), ac->internal_to_user (ac->get_value ())); + return buffer; + } + + return Automatable::value_as_string (ac); +} + +/** Sets up the buffer that setup_gain_automation and ::run will use for + * gain automationc curves. Must be called before setup_gain_automation, + * and must be called with process lock held. + */ + +void +Amp::set_gain_automation_buffer (gain_t* g) +{ + _gain_automation_buffer = g; +}