#include "ardour/amp.h"
#include "ardour/audio_buffer.h"
#include "ardour/buffer_set.h"
-#include "ardour/configuration.h"
-#include "ardour/io.h"
+#include "ardour/gain_control.h"
#include "ardour/midi_buffer.h"
+#include "ardour/rc_configuration.h"
#include "ardour/session.h"
-#include "i18n.h"
+#include "pbd/i18n.h"
using namespace ARDOUR;
using namespace PBD;
-Amp::Amp (Session& s)
+// used for low-pass filter denormal protection
+#define GAIN_COEFF_TINY (1e-10) // -200dB
+
+Amp::Amp (Session& s, const std::string& name, boost::shared_ptr<GainControl> gc, bool control_midi_also)
: Processor(s, "Amp")
, _apply_gain(true)
, _apply_gain_automation(false)
- , _current_gain(1.0)
-{
- Evoral::Parameter p (GainAutomation);
- /* gain range of -inf to +6dB, default 0dB */
- p.set_range (0, 1.99526231f, 1, false);
- boost::shared_ptr<AutomationList> gl (new AutomationList (p));
- _gain_control = boost::shared_ptr<GainControl> (new GainControl (X_("gaincontrol"), s, this, p, gl));
- add_control(_gain_control);
-}
-
-std::string
-Amp::display_name() const
+ , _current_gain(GAIN_COEFF_ZERO)
+ , _current_automation_frame (INT64_MAX)
+ , _gain_control (gc)
+ , _gain_automation_buffer(0)
+ , _midi_amp (control_midi_also)
{
- return _("Fader");
+ set_display_name (name);
+ add_control (_gain_control);
}
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;
}
void
-Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
+Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, double /*speed*/, pframes_t nframes, bool)
{
if (!_active && !_pending_active) {
return;
if (_apply_gain_automation) {
- gain_t* gab = _session.gain_automation_buffer ();
+ 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<MidiBuffer::TimeType> 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 */
- gain_t const dg = _gain_control->user_double();
+ gain_t const dg = _gain_control->get_value();
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);
+ 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 (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) {
+ Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m;
+ if (ev.is_note_on()) {
+ ev.scale_velocity (fabsf (_current_gain));
+ }
}
}
}
_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<MidiBuffer::TimeType> ev = *m;
+ 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);
+ 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<MidiBuffer::TimeType> ev = *m;
- if (ev.is_note_on()) {
- ev.set_velocity (0);
+ 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);
+ }
}
}
}
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<MidiBuffer::TimeType> ev = *m;
- if (ev.is_note_on()) {
- ev.scale_velocity (target);
+ for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) {
+ Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m;
+ if (ev.is_note_on()) {
+ ev.scale_velocity (fabsf (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)
-{
- // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05))
- if (val > 1.99526231f) {
- val = 1.99526231f;
- }
-
- 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());
+ node.add_property("type", _gain_control->parameter().type() == GainAutomation ? "amp" : "trim");
+ node.add_child_nocopy (_gain_control->get_state());
return node;
}
return 0;
}
-void
-Amp::GainControl::set_value (double val)
-{
- // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05))
- if (val > 1.99526231) {
- val = 1.99526231;
- }
-
- _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::Mutex::Lock am (control_lock(), Glib::TRY_LOCK);
+ 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, _session.gain_automation_buffer(), nframes);
+ start_frame, end_frame, _gain_automation_buffer, nframes);
+ if (start_frame != _current_automation_frame && _session.bounce_processing ()) {
+ _current_gain = _gain_automation_buffer[0];
+ }
+ _current_automation_frame = end_frame;
} else {
_apply_gain_automation = false;
+ _current_automation_frame = INT64_MAX;
}
}
}
std::string
-Amp::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+Amp::value_as_string (boost::shared_ptr<const AutomationControl> 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;
}
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;
+}
projects / ardour.git / blobdiff