X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Famp.cc;h=132be2e1c6db4c9cf8efa2066730b77dd885a34d;hb=84bcf5981274ea0674f5702ef1f0570c2b57a0f2;hp=aa20f3e389da23a677262ff76a4806bb915a9c71;hpb=7183242b8c8d9296f94a035fb66b1eae06fd3496;p=ardour.git diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index aa20f3e389..132be2e1c6 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -1,46 +1,67 @@ /* - 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. */ +#include #include #include #include + +#include "evoral/Curve.hpp" + #include "ardour/amp.h" #include "ardour/audio_buffer.h" #include "ardour/buffer_set.h" -#include "ardour/configuration.h" -#include "ardour/io.h" +#include "ardour/midi_buffer.h" #include "ardour/session.h" -namespace ARDOUR { +#include "i18n.h" + +using namespace ARDOUR; +using namespace PBD; +using std::min; -Amp::Amp(Session& s, IO& io) +/* gain range of -inf to +6dB, default 0dB */ +const float Amp::max_gain_coefficient = 1.99526231f; + +Amp::Amp (Session& s) : Processor(s, "Amp") - , _io(io) - , _mute(false) , _apply_gain(true) , _apply_gain_automation(false) , _current_gain(1.0) - , _desired_gain(1.0) + , _gain_automation_buffer(0) +{ + 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"); } 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; @@ -52,111 +73,89 @@ Amp::configure_io (ChanCount in, ChanCount out) if (out != in) { // always 1:1 return false; } - + return Processor::configure_io (in, out); } void -Amp::run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes) +Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool) { - gain_t* gab = _session.gain_automation_buffer(); - - if (_mute && !bufs.is_silent()) { - Amp::apply_gain (bufs, nframes, _current_mute_gain, _desired_mute_gain, false); - if (_desired_mute_gain == 0.0f) { - bufs.is_silent(true); - } + if (!_active && !_pending_active) { + return; } if (_apply_gain) { - + if (_apply_gain_automation) { - - if (_io.phase_invert()) { - 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]; - } - } - } else { - 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_t* gab = _gain_automation_buffer; + assert (gab); + + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + Sample* const sp = i->data(); + for (pframes_t nx = 0; nx < nframes; ++nx) { + sp[nx] *= gab[nx]; } } - + + _current_gain = gab[nframes-1]; + } else { /* manual (scalar) gain */ - - if (_current_gain != _desired_gain) { - - Amp::apply_gain (bufs, nframes, _current_gain, _desired_gain, _io.phase_invert()); - _current_gain = _desired_gain; - - } else if (_current_gain != 0.0f && (_io.phase_invert() || _current_gain != 1.0f)) { - - /* no need to interpolate current gain value, - but its non-unity, so apply it. if the gain - is zero, do nothing because we'll ship silence - below. + + gain_t const dg = _gain_control->user_double(); + + 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 */ - gain_t this_gain; - - if (_io.phase_invert()) { - this_gain = -_current_gain; - } else { - this_gain = _current_gain; - } - - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - Sample* const sp = i->data(); - apply_gain_to_buffer(sp, nframes, this_gain); + 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); + } + } } - } else if (_current_gain == 0.0f) { for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - i->clear(); + apply_gain_to_buffer (i->data(), nframes, _current_gain); } } } } + + _active = _pending_active; } -/** Apply a declicked gain to the audio buffers of @a bufs */ void -Amp::apply_gain (BufferSet& bufs, nframes_t nframes, - gain_t initial, gain_t target, bool invert_polarity) +Amp::apply_gain (BufferSet& bufs, framecnt_t nframes, gain_t initial, gain_t target) { - if (nframes == 0) { - return; - } + /** Apply a (potentially) declicked gain to the buffers of @a bufs + */ - if (bufs.count().n_audio() == 0) { + if (nframes == 0 || bufs.count().n_total() == 0) { return; } // if we don't need to declick, defer to apply_simple_gain if (initial == target) { - if (target == 0.0) { - 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) { - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - apply_gain_to_buffer (i->data(), nframes, target); - } - } + apply_simple_gain (bufs, nframes, target); return; } - const nframes_t declick = std::min ((nframes_t)128, nframes); + const framecnt_t declick = std::min ((framecnt_t) 128, nframes); gain_t delta; double fractional_shift = -1.0/declick; double fractional_pos; - gain_t polscale = invert_polarity ? -1.0f : 1.0f; if (target < initial) { /* fade out: remove more and more of delta from initial */ @@ -166,26 +165,93 @@ Amp::apply_gain (BufferSet& bufs, nframes_t nframes, delta = target - initial; } + /* MIDI Gain */ + + 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()) { + const gain_t scale = delta * (ev.time()/(double) nframes); + ev.scale_velocity (initial+scale); + } + } + } + + /* Audio Gain */ + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { Sample* const buffer = i->data(); fractional_pos = 1.0; - 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 * (0.5 + 0.5 * cos (M_PI * fractional_pos)))); fractional_pos += fractional_shift; } - + /* now ensure the rest of the buffer has the target value applied, if necessary. */ - + if (declick != nframes) { - if (invert_polarity) { - target = -target; + 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); } + } + } +} + +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; + + if (dir < 0) { + /* fade out: remove more and more of delta from initial */ + delta = -1.0; + initial = 1.0; + target = 0.0; + } else { + /* fade in: add more and more of delta from initial */ + delta = 1.0; + initial = 0.0; + target = 1.0; + } + + /* Audio Gain */ + + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + Sample* const buffer = i->data(); + + 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; + } + + /* 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)); + memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick)); } else if (target != 1.0) { apply_gain_to_buffer (&buffer[declick], nframes - declick, target); } @@ -194,22 +260,215 @@ Amp::apply_gain (BufferSet& bufs, nframes_t nframes, } void -Amp::apply_simple_gain (BufferSet& bufs, nframes_t nframes, gain_t target) +Amp::apply_gain (AudioBuffer& buf, framecnt_t nframes, gain_t initial, gain_t target) +{ + /** Apply a (potentially) declicked gain to the contents of @a buf + */ + + if (nframes == 0) { + return; + } + + // 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; + } + + + Sample* const buffer = buf.data(); + + 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; + } + + /* 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); + } + } +} + +void +Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target) +{ + if (target == 0.0) { + + 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) { + + 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 (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + apply_gain_to_buffer (i->data(), nframes, target); + } + } +} + +void +Amp::apply_simple_gain (AudioBuffer& buf, framecnt_t nframes, gain_t target) +{ + if (target == 0.0) { + memset (buf.data(), 0, sizeof (Sample) * nframes); + } else if (target != 1.0) { + 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 *) { + _gain_control->set_value (val); } XMLNode& Amp::state (bool full_state) { - return get_state(); + XMLNode& node (Processor::state (full_state)); + node.add_property("type", "amp"); + node.add_child_nocopy (_gain_control->get_state()); + + return node; } -XMLNode& -Amp::get_state() +int +Amp::set_state (const XMLNode& node, int version) +{ + XMLNode* gain_node; + + Processor::set_state (node, version); + + if ((gain_node = node.child (Controllable::xml_node_name.c_str())) != 0) { + _gain_control->set_state (*gain_node, version); + } + + return 0; +} + +void +Amp::GainControl::set_value (double val) +{ + AutomationControl::set_value (min (val, (double) max_gain_coefficient)); + _amp->session().set_dirty (); +} + +double +Amp::GainControl::internal_to_interface (double v) const +{ + return gain_to_slider_position (v); +} + +double +Amp::GainControl::interface_to_internal (double v) const { - XMLNode* node = new XMLNode(state_node_name); - node->add_property("type", "amp"); - return *node; + return slider_position_to_gain (v); } -} // namespace ARDOUR +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). + */ +void +Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framecnt_t nframes) +{ + Glib::Threads::Mutex::Lock am (control_lock(), Glib::Threads::TRY_LOCK); + + if (am.locked() && _session.transport_rolling() && _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); + } else { + _apply_gain_automation = false; + } +} + +bool +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; +}