X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Famp.cc;h=d5b9f56ca5f932a7ddc67eaeada5668815c1e2e5;hb=6894f468d4e5fcd6624368f7a7f820a9fcaa4455;hp=c97d6244405eaecdd2a410e947d6b46cc0d48219;hpb=bfd50cdeb0416b106a7813177148dffb1af6db8e;p=ardour.git diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index c97d624440..d5b9f56ca5 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -26,38 +26,31 @@ #include "ardour/amp.h" #include "ardour/audio_buffer.h" #include "ardour/buffer_set.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; -using std::min; -/* gain range of -inf to +6dB, default 0dB */ -const float Amp::max_gain_coefficient = 1.99526231f; +// used for low-pass filter denormal protection +#define GAIN_COEFF_TINY (1e-10) // -200dB -Amp::Amp (Session& s) +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) + , _current_gain(GAIN_COEFF_ZERO) + , _current_automation_frame (INT64_MAX) + , _gain_control (gc) , _gain_automation_buffer(0) + , _midi_amp (control_midi_also) { - Evoral::Parameter p (GainAutomation); - p.set_range (0, max_gain_coefficient, 1, false); - boost::shared_ptr gl (new AutomationList (p)); - _gain_control = boost::shared_ptr (new GainControl (X_("gaincontrol"), s, this, p, gl)); - _gain_control->set_flags (Controllable::GainLike); - - add_control(_gain_control); -} - -std::string -Amp::display_name() const -{ - return _("Fader"); + set_display_name (name); + add_control (_gain_control); } bool @@ -91,14 +84,37 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, 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()])); + } + } + } + } + + + const double a = 156.825 / _session.nominal_frame_rate(); // 25 Hz LPF; see Amp::apply_gain for details + double lpf = _current_gain; + 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] *= gab[nx]; + sp[nx] *= lpf; + lpf += a * (gab[nx] - lpf); } } - _current_gain = gab[nframes-1]; + if (fabs (lpf) < GAIN_COEFF_TINY) { + _current_gain = GAIN_COEFF_ZERO; + } else { + _current_gain = lpf; + } } else { /* manual (scalar) gain */ @@ -106,22 +122,23 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, if (_current_gain != dg) { - Amp::apply_gain (bufs, nframes, _current_gain, dg); - _current_gain = dg; + _current_gain = Amp::apply_gain (bufs, _session.nominal_frame_rate(), nframes, _current_gain, dg, _midi_amp); - } else if (_current_gain != 1.0f) { + } else if (_current_gain != GAIN_COEFF_UNITY) { - /* gain has not changed, but its non-unity - */ + /* gain has not changed, but its non-unity */ - for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { + 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 (_current_gain); + 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)); + } } } } @@ -136,192 +153,161 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, _active = _pending_active; } -void -Amp::apply_gain (BufferSet& bufs, framecnt_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 buffers of @a bufs - */ + /** Apply a (potentially) declicked gain to the buffers of @a bufs */ + gain_t rv = target; if (nframes == 0 || bufs.count().n_total() == 0) { - return; + return initial; } // if we don't need to declick, defer to apply_simple_gain if (initial == target) { apply_simple_gain (bufs, nframes, target); - return; - } - - const framecnt_t declick = std::min ((framecnt_t) 128, nframes); - gain_t delta; - double fractional_shift = -1.0/declick; - double fractional_pos; - - 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; + 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) { - 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); + MidiBuffer& mb (*i); - for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { - Evoral::MIDIEvent ev = *m; + 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 (initial+scale); + 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; - fractional_pos = 1.0; - - for (pframes_t nx = 0; nx < declick; ++nx) { - buffer[nx] *= (initial + (delta * (0.5 + 0.5 * cos (M_PI * fractional_pos)))); - fractional_pos += fractional_shift; + for (pframes_t nx = 0; nx < nframes; ++nx) { + buffer[nx] *= lpf; + lpf += a * (target - lpf); } - - /* 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 (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) { - /* Almost exactly like ::apply_gain() but skips MIDI buffers and has fixed initial+target - values. - */ - if (nframes == 0 || bufs.count().n_total() == 0) { return; } - const framecnt_t declick = std::min ((framecnt_t) 128, nframes); - gain_t delta, initial, target; - double fractional_shift = -1.0/(declick-1); - double fractional_pos; + const framecnt_t declick = std::min ((framecnt_t) 512, nframes); + const double fractional_shift = 1.0 / declick ; + gain_t delta, initial; if (dir < 0) { /* fade out: remove more and more of delta from initial */ delta = -1.0; - initial = 1.0; - target = 0.0; + initial = GAIN_COEFF_UNITY; } else { /* fade in: add more and more of delta from initial */ delta = 1.0; - initial = 0.0; - target = 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 (pframes_t nx = 0; nx < declick; ++nx) { - buffer[nx] *= (initial + (delta * (0.5 + 0.5 * cos (M_PI * fractional_pos)))); + 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) { + if (dir < 0) { memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick)); - } else if (target != 1.0) { - apply_gain_to_buffer (&buffer[declick], nframes - declick, target); } } } } -void -Amp::apply_gain (AudioBuffer& buf, framecnt_t nframes, gain_t initial, gain_t target) + +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 + /* Apply a (potentially) declicked gain to the contents of @a buf + * -- used by MonitorProcessor::run() */ if (nframes == 0) { - return; + return initial; } // if we don't need to declick, defer to apply_simple_gain if (initial == target) { apply_simple_gain (buf, nframes, target); - return; - } - - const framecnt_t declick = std::min ((framecnt_t) 128, nframes); - gain_t delta; - double fractional_shift = -1.0/declick; - double fractional_pos; - - 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; + 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 - fractional_pos = 1.0; - - for (pframes_t nx = 0; nx < declick; ++nx) { - buffer[nx] *= (initial + (delta * (0.5 + 0.5 * cos (M_PI * fractional_pos)))); - fractional_pos += fractional_shift; + double lpf = initial; + for (pframes_t nx = 0; nx < nframes; ++nx) { + buffer[nx] *= lpf; + lpf += a * (target - lpf); } - /* 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 (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, framecnt_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) { - for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { - MidiBuffer& mb (*i); + 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 (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + ev.set_velocity (0); + } } } } @@ -330,15 +316,18 @@ Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target) memset (i->data(), 0, sizeof (Sample) * nframes); } - } else if (target != 1.0) { + } else if (target != GAIN_COEFF_UNITY) { - for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { - MidiBuffer& mb (*i); + 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 (target); + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::MIDIEvent ev = *m; + if (ev.is_note_on()) { + ev.scale_velocity (fabsf (target)); + } } } } @@ -352,47 +341,19 @@ Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target) void Amp::apply_simple_gain (AudioBuffer& buf, framecnt_t nframes, gain_t target) { - if (target == 0.0) { + if (fabsf (target) < GAIN_COEFF_SMALL) { memset (buf.data(), 0, sizeof (Sample) * nframes); - } else if (target != 1.0) { + } else if (target != GAIN_COEFF_UNITY) { apply_gain_to_buffer (buf.data(), nframes, target); } } -void -Amp::inc_gain (gain_t factor, void *src) -{ - float desired_gain = _gain_control->user_double(); - - 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) -{ - val = min (val, max_gain_coefficient); - - 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_double (val); - _session.set_dirty(); -} - XMLNode& Amp::state (bool full_state) { XMLNode& node (Processor::state (full_state)); - node.add_property("type", "amp"); - node.add_child_nocopy (_gain_control->get_state()); + node.add_property("type", _gain_control->parameter().type() == GainAutomation ? "amp" : "trim"); + node.add_child_nocopy (_gain_control->get_state()); return node; } @@ -411,36 +372,6 @@ Amp::set_state (const XMLNode& node, int version) return 0; } -void -Amp::GainControl::set_value (double val) -{ - if (val > max_gain_coefficient) { - val = max_gain_coefficient; - } - - _amp->set_gain (val, this); - - AutomationControl::set_value(val); -} - -double -Amp::GainControl::internal_to_interface (double v) const -{ - return gain_to_slider_position (v); -} - -double -Amp::GainControl::interface_to_internal (double v) const -{ - return slider_position_to_gain (v); -} - -double -Amp::GainControl::internal_to_user (double v) const -{ - return accurate_coefficient_to_dB (v); -} - /** 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). @@ -450,12 +381,20 @@ Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framec { Glib::Threads::Mutex::Lock am (control_lock(), Glib::Threads::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, _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; } } @@ -470,7 +409,7 @@ 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 ())); + snprintf (buffer, sizeof (buffer), _("%.2fdB"), ac->internal_to_user (ac->get_value ())); return buffer; }