/*
- 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 <ardour/amp.h>
-
-#include <algorithm>
+#include <iostream>
+#include <cstring>
#include <cmath>
-#include <ardour/buffer_set.h>
-#include <ardour/buffer.h>
+#include <algorithm>
+
+#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<AutomationList> gl(new AutomationList(Evoral::Parameter(GainAutomation)));
+ _gain_control = boost::shared_ptr<GainControl>( 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<MidiBuffer::TimeType> 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;
}
- const nframes_t declick = std::min ((nframes_t)128, nframes);
+ // 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;
- gain_t polscale = invert_polarity ? -1.0f : 1.0f;
if (target < initial) {
/* fade out: remove more and more of delta from initial */
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<MidiBuffer::TimeType> 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));
}
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<MidiBuffer::TimeType> 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<MidiBuffer::TimeType> 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;
+}
projects / ardour.git / blobdiff