/*
- 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 <iostream>
#include <cstring>
#include <cmath>
#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"
-namespace ARDOUR {
+#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;
-Amp::Amp(Session& s, IO& io)
+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<AutomationList> gl (new AutomationList (p));
+ _gain_control = boost::shared_ptr<GainControl> (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;
if (out != in) { // always 1:1
return false;
}
-
+
return Processor::configure_io (in, out);
}
void
-Amp::run_in_place (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* 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<MidiBuffer::TimeType> 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 */
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()) {
+ 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);
}
}
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);
+ }
+ }
+ }
+
+ 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)
+{
+ 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&
{
XMLNode& node (Processor::state (full_state));
node.add_property("type", "amp");
+ node.add_child_nocopy (_gain_control->get_state());
+
return node;
}
-} // namespace ARDOUR
+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)
+{
+ 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).
+ */
+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<AutomationControl> 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;
+}