X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Famp.cc;h=dd5c7ae4fa4d98e718695d72356a7eebe0b77d70;hb=3c7dea43af9d9e5b2563aee81ac5253fb2ee7858;hp=348f6957d41d11d3cb481138fe86a2d57070b366;hpb=c65f30b4b10a451baa28f66a89c8035a82b11a65;p=ardour.git diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index 348f6957d4..dd5c7ae4fa 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -35,15 +35,13 @@ using namespace ARDOUR; using namespace PBD; -// used for low-pass filter denormal protection -#define GAIN_COEFF_TINY (1e-10) // -200dB +#define GAIN_COEFF_DELTA (1e-5) Amp::Amp (Session& s, const std::string& name, boost::shared_ptr gc, bool control_midi_also) : Processor(s, "Amp") - , _apply_gain(true) , _apply_gain_automation(false) , _current_gain(GAIN_COEFF_ZERO) - , _current_automation_frame (INT64_MAX) + , _current_automation_sample (INT64_MAX) , _gain_control (gc) , _gain_automation_buffer(0) , _midi_amp (control_midi_also) @@ -77,82 +75,96 @@ scale_midi_velocity(Evoral::Event& ev, float factor) } void -Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, double /*speed*/, pframes_t nframes, bool) +Amp::run (BufferSet& bufs, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double /*speed*/, pframes_t nframes, bool) { if (!_active && !_pending_active) { + /* disregard potentially prepared gain-automation. */ + _apply_gain_automation = false; return; } - if (_apply_gain) { + if (_apply_gain_automation) { - if (_apply_gain_automation) { + gain_t* gab = _gain_automation_buffer; + assert (gab); - gain_t* gab = _gain_automation_buffer; - assert (gab); + /* see note in PluginInsert::connect_and_run -- effectively emit Changed signal */ + _gain_control->set_value_unchecked (gab[0]); - 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::Event ev = *m; - if (ev.is_note_on()) { - assert(ev.time() >= 0 && ev.time() < nframes); - scale_midi_velocity (ev, fabsf (gab[ev.time()])); - } + 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::Event ev = *m; + if (ev.is_note_on()) { + assert(ev.time() >= 0 && ev.time() < nframes); + scale_midi_velocity (ev, fabsf (gab[ev.time()])); } } } + } + const gain_t a = 156.825f / (gain_t)_session.nominal_sample_rate(); // 25 Hz LPF; see Amp::apply_gain for details + gain_t 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(); - lpf = _current_gain; - for (pframes_t nx = 0; nx < nframes; ++nx) { - sp[nx] *= lpf; - lpf += a * (gab[nx] - lpf); - } + 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] *= lpf; + lpf += a * (gab[nx] - lpf); } + } - if (fabs (lpf) < GAIN_COEFF_TINY) { - _current_gain = GAIN_COEFF_ZERO; - } else { - _current_gain = lpf; - } + if (fabsf (lpf) < GAIN_COEFF_SMALL) { + _current_gain = GAIN_COEFF_ZERO; + } else { + _current_gain = lpf; + } - } else { /* manual (scalar) gain */ + /* used it, don't do it again until setup_gain_automation() is + * called successfully. + */ + _apply_gain_automation = false; + + } else { /* manual (scalar) gain */ - gain_t const dg = _gain_control->get_value(); + gain_t const target_gain = _gain_control->get_value(); - if (_current_gain != dg) { + if (fabsf (_current_gain - target_gain) >= GAIN_COEFF_DELTA) { - _current_gain = Amp::apply_gain (bufs, _session.nominal_frame_rate(), nframes, _current_gain, dg, _midi_amp); + _current_gain = Amp::apply_gain (bufs, _session.nominal_sample_rate(), nframes, _current_gain, target_gain, _midi_amp); - } else if (_current_gain != GAIN_COEFF_UNITY) { + /* see note in PluginInsert::connect_and_run () + * set_value_unchecked() won't emit a signal since the value is effectively unchanged + */ + _gain_control->Changed (false, PBD::Controllable::NoGroup); - /* gain has not changed, but its non-unity */ + } else if (target_gain != GAIN_COEFF_UNITY) { - 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) { + _current_gain = target_gain; - 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) { - for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { - Evoral::Event ev = *m; - if (ev.is_note_on()) { - scale_midi_velocity (ev, fabsf (_current_gain)); - } + MidiBuffer& mb (*i); + + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { + Evoral::Event ev = *m; + if (ev.is_note_on()) { + scale_midi_velocity (ev, fabsf (_current_gain)); } } } + } - for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { - apply_gain_to_buffer (i->data(), nframes, _current_gain); - } + for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { + apply_gain_to_buffer (i->data(), nframes, _current_gain); } + } else { + /* unity target gain */ + _current_gain = target_gain; } } @@ -160,9 +172,9 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, } gain_t -Amp::apply_gain (BufferSet& bufs, framecnt_t sample_rate, framecnt_t nframes, gain_t initial, gain_t target, bool midi_amp) +Amp::apply_gain (BufferSet& bufs, samplecnt_t sample_rate, samplecnt_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) { @@ -207,7 +219,7 @@ Amp::apply_gain (BufferSet& bufs, framecnt_t sample_rate, framecnt_t nframes, ga /* 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 + const gain_t a = 156.825f / (gain_t)sample_rate; // 25 Hz LPF for (BufferSet::audio_iterator i = bufs.audio_begin(); i != bufs.audio_end(); ++i) { Sample* const buffer = i->data(); @@ -221,57 +233,14 @@ Amp::apply_gain (BufferSet& bufs, framecnt_t sample_rate, framecnt_t nframes, ga rv = lpf; } } - if (fabsf (rv - target) < GAIN_COEFF_TINY) return target; - if (fabsf (rv) < GAIN_COEFF_TINY) return GAIN_COEFF_ZERO; + if (fabsf (rv - target) < GAIN_COEFF_DELTA) return target; return rv; } -void -Amp::declick (BufferSet& bufs, framecnt_t nframes, int dir) -{ - if (nframes == 0 || bufs.count().n_total() == 0) { - return; - } - - 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 = GAIN_COEFF_UNITY; - } else { - /* fade in: add more and more of delta from initial */ - delta = 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(); - - double fractional_pos = 0.0; - - for (pframes_t nx = 0; nx < declick; ++nx) { - 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 (dir < 0) { - memset (&buffer[declick], 0, sizeof (Sample) * (nframes - declick)); - } - } - } -} - - gain_t -Amp::apply_gain (AudioBuffer& buf, framecnt_t sample_rate, framecnt_t nframes, gain_t initial, gain_t target) +Amp::apply_gain (AudioBuffer& buf, samplecnt_t sample_rate, samplecnt_t nframes, gain_t initial, gain_t target, sampleoffset_t offset) { - /* 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() */ @@ -281,26 +250,25 @@ Amp::apply_gain (AudioBuffer& buf, framecnt_t sample_rate, framecnt_t nframes, g // if we don't need to declick, defer to apply_simple_gain if (initial == target) { - apply_simple_gain (buf, nframes, target); + apply_simple_gain (buf, nframes, target, offset); 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 + Sample* const buffer = buf.data (offset); + const gain_t a = 156.825f / (gain_t)sample_rate; // 25 Hz LPF, see [other] Amp::apply_gain() above for details - double lpf = initial; - for (pframes_t nx = 0; nx < nframes; ++nx) { - buffer[nx] *= lpf; + gain_t lpf = initial; + for (pframes_t nx = 0; nx < nframes; ++nx) { + buffer[nx] *= lpf; lpf += a * (target - lpf); - } + } - if (fabs (lpf - target) < GAIN_COEFF_TINY) return target; - if (fabs (lpf) < GAIN_COEFF_TINY) return GAIN_COEFF_ZERO; + if (fabsf (lpf - target) < GAIN_COEFF_DELTA) return target; return lpf; } void -Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target, bool midi_amp) +Amp::apply_simple_gain (BufferSet& bufs, samplecnt_t nframes, gain_t target, bool midi_amp) { if (fabsf (target) < GAIN_COEFF_SMALL) { @@ -345,19 +313,19 @@ Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target, bool } void -Amp::apply_simple_gain (AudioBuffer& buf, framecnt_t nframes, gain_t target) +Amp::apply_simple_gain (AudioBuffer& buf, samplecnt_t nframes, gain_t target, sampleoffset_t offset) { if (fabsf (target) < GAIN_COEFF_SMALL) { - memset (buf.data(), 0, sizeof (Sample) * nframes); + memset (buf.data (offset), 0, sizeof (Sample) * nframes); } else if (target != GAIN_COEFF_UNITY) { - apply_gain_to_buffer (buf.data(), nframes, target); + apply_gain_to_buffer (buf.data(offset), nframes, target); } } XMLNode& -Amp::state (bool full_state) +Amp::state () { - XMLNode& node (Processor::state (full_state)); + XMLNode& node (Processor::state ()); node.set_property("type", _gain_control->parameter().type() == GainAutomation ? "amp" : "trim"); node.add_child_nocopy (_gain_control->get_state()); @@ -381,9 +349,12 @@ Amp::set_state (const XMLNode& node, int version) /** 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). + * + * After calling this, the gain-automation buffer is valid for the next run. + * so make sure to call ::run() which invalidates the buffer again. */ void -Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framecnt_t nframes) +Amp::setup_gain_automation (samplepos_t start_sample, samplepos_t end_sample, samplecnt_t nframes) { Glib::Threads::Mutex::Lock am (control_lock(), Glib::Threads::TRY_LOCK); @@ -392,30 +363,16 @@ Amp::setup_gain_automation (framepos_t start_frame, framepos_t end_frame, framec && _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); - - /* XXX the future requires a way to automate the control master - * and merge its own automation vector/curve with this one. We - * don't have a way to do that just yet, so for now, just get - * the master's current gain and scale our own automation - * vector/curve by this value. - */ - - if (_gain_control->slaved()) { - const double master_gain = _gain_control->get_masters_value (); - if (master_gain != 1.0) { - apply_gain_to_buffer (_gain_automation_buffer, nframes, master_gain); - } - } - if (start_frame != _current_automation_frame && _session.bounce_processing ()) { + _apply_gain_automation = _gain_control->get_masters_curve ( start_sample, end_sample, _gain_automation_buffer, nframes); + + if (start_sample != _current_automation_sample && _session.bounce_processing ()) { _current_gain = _gain_automation_buffer[0]; } - _current_automation_frame = end_frame; + _current_automation_sample = end_sample; } else { _apply_gain_automation = false; - _current_automation_frame = INT64_MAX; + _current_automation_sample = INT64_MAX; } } @@ -425,23 +382,10 @@ Amp::visible() const return true; } -std::string -Amp::value_as_string (boost::shared_ptr 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) {