#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"
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)
: Processor(s, "Amp")
, _apply_gain(true)
, _apply_gain_automation(false)
, _current_gain(1.0)
+ , _gain_automation_buffer(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 ));
+ 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);
}
if (_apply_gain_automation) {
- gain_t* gab = _session.gain_automation_buffer ();
+ 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();
sp[nx] *= gab[nx];
}
}
-
+
_current_gain = gab[nframes-1];
} else { /* manual (scalar) 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()) {
Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m;
if (ev.is_note_on()) {
- gain_t scale = delta * (ev.time()/(double) nframes);
+ const gain_t scale = delta * (ev.time()/(double) nframes);
ev.scale_velocity (initial+scale);
}
}
const framecnt_t declick = std::min ((framecnt_t) 128, nframes);
gain_t delta, initial, target;
- double fractional_shift = -1.0/declick;
+ double fractional_shift = -1.0/(declick-1);
double fractional_pos;
if (dir < 0) {
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);
}
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) {
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;
+ val = min (val, max_gain_coefficient);
if (src != _gain_control.get()) {
_gain_control->set_value (val);
return;
}
- _gain_control->set_double(val, false);
+ _gain_control->set_double (val);
_session.set_dirty();
}
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;
+ if (val > max_gain_coefficient) {
+ val = max_gain_coefficient;
}
_amp->set_gain (val, this);
}
double
-Amp::GainControl::get_value (void) const
+Amp::GainControl::internal_to_interface (double v) const
{
- return AutomationControl::get_value();
+ 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()) {
+ 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);
} else {
_apply_gain_automation = false;
}
{
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;
+}
projects / ardour.git / blobdiff