X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=libs%2Fardour%2Famp.cc;h=40a1de2047ef7eaa345ec6e7feaad27478c6f058;hb=ac367e89043e0a7f0db6ca44edf5edaab27e8091;hp=ca1aa74bb57ce8ffce99a03b6aea9b3381910ee9;hpb=a8da89d745c6a7e7d4c20dfcfb16b2537d767428;p=ardour.git diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index ca1aa74bb5..40a1de2047 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -1,57 +1,153 @@ /* - 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 -#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" + +#include "i18n.h" + +using namespace ARDOUR; +using namespace PBD; + +Amp::Amp (Session& s) + : Processor(s, "Amp") + , _apply_gain(true) + , _apply_gain_automation(false) + , _current_gain(1.0) +{ + 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"); +} + +bool +Amp::can_support_io_configuration (const ChanCount& in, ChanCount& out) const +{ + out = in; + return true; +} -namespace ARDOUR { +bool +Amp::configure_io (ChanCount in, ChanCount out) +{ + if (out != in) { // always 1:1 + return false; + } + return Processor::configure_io (in, out); +} -/** Apply a declicked gain to the audio buffers of @a bufs */ void -Amp::run (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target, bool invert_polarity) +Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool) { - if (nframes == 0) + if (!_active && !_pending_active) { return; + } - if (bufs.count().get(DataType::AUDIO) == 0) - return; + if (_apply_gain) { - // assert(bufs.buffer_capacity(DataType::AUDIO) >= nframes); + if (_apply_gain_automation) { - // if we don't need to declick, defer to apply_simple_gain + gain_t* gab = _session.gain_automation_buffer (); - if (initial == target) { - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - apply_gain_to_buffer (i->data (), nframes, target); + 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 */ + + 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 + */ + + 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); + } + } + } + + 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, framecnt_t nframes, gain_t initial, gain_t target) +{ + /** Apply a (potentially) declicked gain to the buffers of @a bufs + */ + + if (nframes == 0 || bufs.count().n_total() == 0) { + return; + } + + // if we don't need to declick, defer to apply_simple_gain + if (initial == 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 */ @@ -61,26 +157,93 @@ Amp::run (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target, boo 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()) { + 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); } @@ -89,9 +252,196 @@ Amp::run (BufferSet& bufs, nframes_t nframes, gain_t initial, gain_t target, boo } 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); + } + } + } -} // namespace ARDOUR + 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 *src) +{ + // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05)) + if (val > 1.99526231f) { + val = 1.99526231f; + } + + //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_double(val, false); + _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()); + + return node; +} + +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) +{ + // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05)) + if (val > 1.99526231f) { + val = 1.99526231f; + } + + _amp->set_gain (val, this); + + AutomationControl::set_value(val); +} + +double +Amp::GainControl::get_value (void) const +{ + return AutomationControl::get_value(); +} + +void +Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framecnt_t nframes) +{ + Glib::Mutex::Lock am (control_lock(), Glib::TRY_LOCK); + + if (am.locked() && _session.transport_rolling() && _gain_control->automation_playback()) { + _apply_gain_automation = _gain_control->list()->curve().rt_safe_get_vector ( + start_frame, end_frame, _session.gain_automation_buffer(), nframes); + } else { + _apply_gain_automation = false; + } +} + +bool +Amp::visible() const +{ + return true; +}