#include "ardour/amp.h"
#include "ardour/audio_buffer.h"
#include "ardour/buffer_set.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, std::string type)
+// 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(GAIN_COEFF_UNITY)
+ , _current_gain(GAIN_COEFF_ZERO)
, _current_automation_frame (INT64_MAX)
+ , _gain_control (gc)
, _gain_automation_buffer(0)
- , _type (type)
- , _midi_amp (type != "trim")
-{
- Evoral::Parameter p (_type == "trim" ? TrimAutomation : GainAutomation);
- boost::shared_ptr<AutomationList> gl (new AutomationList (p));
- _gain_control = boost::shared_ptr<GainControl> (new GainControl ((_type == "trim") ? X_("trimcontrol") : X_("gaincontrol"), s, this, p, gl));
- _gain_control->set_flags (Controllable::GainLike);
-
- add_control(_gain_control);
-}
-
-std::string
-Amp::display_name() const
+ , _midi_amp (control_midi_also)
{
- return _("Fader");
+ set_display_name (name);
+ add_control (_gain_control);
}
bool
}
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;
Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m;
if (ev.is_note_on()) {
assert(ev.time() >= 0 && ev.time() < nframes);
- ev.scale_velocity (gab[ev.time()]);
+ ev.scale_velocity (fabsf (gab[ev.time()]));
}
}
}
}
- const float a = 62.78 / _session.nominal_frame_rate(); // 10 Hz LPF
- float lpf = _current_gain;
+ 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();
}
}
- if (lpf < 1e-10) {
- _current_gain = 0;
+ 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) {
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);
+ ev.scale_velocity (fabsf (_current_gain));
}
}
}
if (ev.is_note_on()) {
const gain_t scale = delta * (ev.time()/(double) nframes);
- ev.scale_velocity (initial+scale);
+ ev.scale_velocity (fabsf (initial+scale));
}
}
}
/* 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 float a = 62.78 / sample_rate; // 10 Hz LPF
+ 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();
- float lpf = initial;
+ double lpf = initial;
for (pframes_t nx = 0; nx < nframes; ++nx) {
buffer[nx] *= lpf;
rv = lpf;
}
}
- // 1e-10 ~ 200dB, prevent denormals.
- if (rv < 1e-10) return 0;
- if (fabsf(rv - 1.0) < 1e-10) return 1.0;
+ if (fabsf (rv - target) < GAIN_COEFF_TINY) return target;
+ if (fabsf (rv) < GAIN_COEFF_TINY) return GAIN_COEFF_ZERO;
return rv;
}
}
Sample* const buffer = buf.data();
- const float a = 62.78 / sample_rate; // 10 Hz LPF, see [other] Amp::apply_gain() above,
+ const double a = 156.825 / sample_rate; // 25 Hz LPF, see [other] Amp::apply_gain() above for details
- float lpf = initial;
+ double lpf = initial;
for (pframes_t nx = 0; nx < nframes; ++nx) {
buffer[nx] *= lpf;
lpf += a * (target - lpf);
}
- if (lpf < 1e-10) return 0; // TODO use GAIN_COEFF_TINY or _DENORMAL
- if (fabsf(lpf - GAIN_COEFF_UNITY) < 1e-10) return GAIN_COEFF_UNITY;
+ 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, bool midi_amp)
{
- if (target < GAIN_COEFF_SMALL) {
+ if (fabsf (target) < GAIN_COEFF_SMALL) {
if (midi_amp) {
/* don't Trim midi velocity -- only relevant for Midi on Audio tracks */
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);
+ ev.scale_velocity (fabsf (target));
}
}
}
void
Amp::apply_simple_gain (AudioBuffer& buf, framecnt_t nframes, gain_t target)
{
- if (target < GAIN_COEFF_SMALL) {
+ if (fabsf (target) < GAIN_COEFF_SMALL) {
memset (buf.data(), 0, sizeof (Sample) * nframes);
} 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 < GAIN_COEFF_SMALL) {
- 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)
{
XMLNode& node (Processor::state (full_state));
- node.add_property("type", _type);
- 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)
-{
- AutomationControl::set_value (std::max (std::min (val, (double)_desc.upper), (double)_desc.lower));
- _amp->session().set_dirty ();
-}
-
-double
-Amp::GainControl::internal_to_interface (double v) const
-{
- if (_desc.type == GainAutomation) {
- return gain_to_slider_position (v);
- } else {
- return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
- }
-}
-
-double
-Amp::GainControl::interface_to_internal (double v) const
-{
- if (_desc.type == GainAutomation) {
- return slider_position_to_gain (v);
- } else {
- return dB_to_coefficient (lower_db + v * range_db);
- }
-}
-
-double
-Amp::GainControl::internal_to_user (double v) const
-{
- return accurate_coefficient_to_dB (v);
-}
-
-double
-Amp::GainControl::user_to_internal (double u) const
-{
- return dB_to_coefficient (u);
-}
-
-std::string
-Amp::GainControl::get_user_string () const
-{
- char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
- return std::string(theBuf);
-}
-
/** 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).
assert (_gain_automation_buffer);
_apply_gain_automation = _gain_control->list()->curve().rt_safe_get_vector (
start_frame, end_frame, _gain_automation_buffer, nframes);
- if (start_frame != _current_automation_frame) {
+ if (start_frame != _current_automation_frame && _session.bounce_processing ()) {
_current_gain = _gain_automation_buffer[0];
}
_current_automation_frame = end_frame;
}
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];
projects / ardour.git / blobdiff