Paul Davis
4c50965622
git-svn-id: svn://localhost/trunk/ardour2@51 d708f5d6-7413-0410-9779-e7cbd77b26cf
878 lines
19 KiB
C++
878 lines
19 KiB
C++
/*
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Copyright (C) 2003 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <sigc++/bind.h>
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#include <ardour/types.h>
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#include <ardour/crossfade.h>
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#include <ardour/crossfade_compare.h>
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#include <ardour/audioregion.h>
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#include <ardour/playlist.h>
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#include <ardour/utils.h>
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#include <ardour/session.h>
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#include "i18n.h"
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#include <locale.h>
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using namespace std;
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using namespace ARDOUR;
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//using namespace sigc;
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jack_nframes_t Crossfade::_short_xfade_length = 0;
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Change Crossfade::ActiveChanged = ARDOUR::new_change();
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/* XXX if and when we ever implement parallel processing of the process()
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callback, these will need to be handled on a per-thread basis.
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*/
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Sample* Crossfade::crossfade_buffer_out = 0;
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Sample* Crossfade::crossfade_buffer_in = 0;
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void
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Crossfade::set_buffer_size (jack_nframes_t sz)
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{
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if (crossfade_buffer_out) {
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delete [] crossfade_buffer_out;
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crossfade_buffer_out = 0;
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}
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if (crossfade_buffer_in) {
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delete [] crossfade_buffer_in;
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crossfade_buffer_in = 0;
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}
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if (sz) {
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crossfade_buffer_out = new Sample[sz];
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crossfade_buffer_in = new Sample[sz];
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}
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}
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bool
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Crossfade::operator== (const Crossfade& other)
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{
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return (_in == other._in) && (_out == other._out);
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}
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Crossfade::Crossfade (ARDOUR::AudioRegion& in, ARDOUR::AudioRegion& out,
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jack_nframes_t length,
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jack_nframes_t position,
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AnchorPoint ap)
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: _fade_in (0.0, 2.0, 1.0), // linear (gain coefficient) => -inf..+6dB
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_fade_out (0.0, 2.0, 1.0) // linear (gain coefficient) => -inf..+6dB
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{
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_in = ∈
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_out = &out;
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_length = length;
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_position = position;
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_anchor_point = ap;
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_follow_overlap = false;
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_active = true;
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_fixed = true;
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initialize ();
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}
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Crossfade::Crossfade (ARDOUR::AudioRegion& a, ARDOUR::AudioRegion& b, CrossfadeModel model, bool act)
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: _fade_in (0.0, 2.0, 1.0), // linear (gain coefficient) => -inf..+6dB
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_fade_out (0.0, 2.0, 1.0) // linear (gain coefficient) => -inf..+6dB
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{
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_in_update = false;
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_fixed = false;
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if (compute (a, b, model)) {
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throw failed_constructor();
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}
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_active = act;
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initialize ();
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}
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Crossfade::Crossfade (const Playlist& playlist, XMLNode& node)
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: _fade_in (0.0, 2.0, 1.0), // linear (gain coefficient) => -inf..+6dB
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_fade_out (0.0, 2.0, 1.0) // linear (gain coefficient) => -inf..+6dB
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{
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Region* r;
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XMLProperty* prop;
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id_t id;
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LocaleGuard lg (X_("POSIX"));
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/* we have to find the in/out regions before we can do anything else */
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if ((prop = node.property ("in")) == 0) {
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error << _("Crossfade: no \"in\" region in state") << endmsg;
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throw failed_constructor();
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}
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sscanf (prop->value().c_str(), "%" PRIu64, &id);
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if ((r = playlist.find_region (id)) == 0) {
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error << string_compose (_("Crossfade: no \"in\" region %1 found in playlist %2"), id, playlist.name())
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<< endmsg;
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throw failed_constructor();
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}
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if ((_in = dynamic_cast<AudioRegion*> (r)) == 0) {
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throw failed_constructor();
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}
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if ((prop = node.property ("out")) == 0) {
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error << _("Crossfade: no \"out\" region in state") << endmsg;
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throw failed_constructor();
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}
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sscanf (prop->value().c_str(), "%" PRIu64, &id);
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if ((r = playlist.find_region (id)) == 0) {
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error << string_compose (_("Crossfade: no \"out\" region %1 found in playlist %2"), id, playlist.name())
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<< endmsg;
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throw failed_constructor();
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}
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if ((_out = dynamic_cast<AudioRegion*> (r)) == 0) {
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throw failed_constructor();
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}
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_length = 0;
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initialize();
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if (set_state (node)) {
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throw failed_constructor();
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}
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}
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Crossfade::~Crossfade ()
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{
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for (StateMap::iterator i = states.begin(); i != states.end(); ++i) {
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delete *i;
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}
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}
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void
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Crossfade::initialize ()
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{
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_in_update = false;
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_out->suspend_fade_out ();
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_in->suspend_fade_in ();
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_fade_out.freeze ();
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_fade_out.clear ();
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_fade_out.add (0.0, 1.0);
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_fade_out.add ((_length * 0.1), 0.99);
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_fade_out.add ((_length * 0.2), 0.97);
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_fade_out.add ((_length * 0.8), 0.03);
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_fade_out.add ((_length * 0.9), 0.01);
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_fade_out.add (_length, 0.0);
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_fade_out.thaw ();
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_fade_in.freeze ();
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_fade_in.clear ();
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_fade_in.add (0.0, 0.0);
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_fade_in.add ((_length * 0.1), 0.01);
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_fade_in.add ((_length * 0.2), 0.03);
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_fade_in.add ((_length * 0.8), 0.97);
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_fade_in.add ((_length * 0.9), 0.99);
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_fade_in.add (_length, 1.0);
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_fade_in.thaw ();
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// _in->StateChanged.connect (slot (*this, &Crossfade::member_changed));
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// _out->StateChanged.connect (slot (*this, &Crossfade::member_changed));
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overlap_type = _in->coverage (_out->position(), _out->last_frame());
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save_state ("initial");
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}
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int
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Crossfade::compute (AudioRegion& a, AudioRegion& b, CrossfadeModel model)
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{
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AudioRegion* top;
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AudioRegion* bottom;
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jack_nframes_t short_xfade_length;
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short_xfade_length = _short_xfade_length;
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if (a.layer() < b.layer()) {
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top = &b;
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bottom = &a;
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} else {
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top = &a;
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bottom = &b;
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}
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/* first check for matching ends */
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if (top->first_frame() == bottom->first_frame()) {
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/* Both regions start at the same point */
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if (top->last_frame() < bottom->last_frame()) {
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/* top ends before bottom, so put an xfade
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in at the end of top.
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*/
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/* [-------- top ---------- ]
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* {====== bottom =====================}
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*/
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_in = bottom;
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_out = top;
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if (top->last_frame() < short_xfade_length) {
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_position = 0;
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} else {
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_position = top->last_frame() - short_xfade_length;
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}
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_length = min (short_xfade_length, top->length());
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_follow_overlap = false;
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_anchor_point = EndOfIn;
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_active = true;
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_fixed = true;
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} else {
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/* top ends after (or same time) as bottom - no xfade
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*/
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/* [-------- top ------------------------ ]
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* {====== bottom =====================}
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*/
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throw NoCrossfadeHere();
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}
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} else if (top->last_frame() == bottom->last_frame()) {
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/* Both regions end at the same point */
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if (top->first_frame() > bottom->first_frame()) {
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/* top starts after bottom, put an xfade in at the
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start of top
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*/
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/* [-------- top ---------- ]
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* {====== bottom =====================}
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*/
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_in = top;
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_out = bottom;
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_position = top->first_frame();
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_length = min (short_xfade_length, top->length());
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_follow_overlap = false;
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_anchor_point = StartOfIn;
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_active = true;
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_fixed = true;
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} else {
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/* top starts before bottom - no xfade
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*/
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/* [-------- top ------------------------ ]
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* {====== bottom =====================}
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*/
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throw NoCrossfadeHere();
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}
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} else {
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/* OK, time to do more regular overlapping */
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OverlapType ot = top->coverage (bottom->first_frame(), bottom->last_frame());
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switch (ot) {
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case OverlapNone:
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/* should be NOTREACHED as a precondition of creating
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a new crossfade, but we need to handle it here.
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*/
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throw NoCrossfadeHere();
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break;
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case OverlapInternal:
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case OverlapExternal:
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/* should be NOTREACHED because of tests above */
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throw NoCrossfadeHere();
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break;
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case OverlapEnd: /* top covers start of bottom but ends within it */
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/* [---- top ------------------------]
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* { ==== bottom ============ }
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*/
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_in = bottom;
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_out = top;
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_position = bottom->first_frame();
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_anchor_point = StartOfIn;
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if (model == FullCrossfade) {
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_length = _out->first_frame() + _out->length() - _in->first_frame();
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/* leave active alone */
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_follow_overlap = true;
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} else {
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_length = min (short_xfade_length, top->length());
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_active = true;
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_follow_overlap = false;
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}
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break;
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case OverlapStart: /* top starts within bottom but covers bottom's end */
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/* { ==== top ============ }
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* [---- bottom -------------------]
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*/
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_in = top;
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_out = bottom;
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_position = top->first_frame();
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_anchor_point = StartOfIn;
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if (model == FullCrossfade) {
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_length = _out->first_frame() + _out->length() - _in->first_frame();
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/* leave active alone */
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_follow_overlap = true;
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} else {
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_length = min (short_xfade_length, top->length());
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_active = true;
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_follow_overlap = false;
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}
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break;
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}
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}
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return 0;
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}
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jack_nframes_t
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Crossfade::read_at (Sample *buf, Sample *mixdown_buffer,
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float *gain_buffer, jack_nframes_t start, jack_nframes_t cnt, uint32_t chan_n,
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jack_nframes_t read_frames, jack_nframes_t skip_frames)
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{
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jack_nframes_t offset;
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jack_nframes_t to_write;
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if (!_active) {
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return 0;
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}
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if (start < _position) {
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/* handle an initial section of the read area that we do not
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cover.
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*/
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offset = _position - start;
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if (offset < cnt) {
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cnt -= offset;
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} else {
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return 0;
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}
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start = _position;
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buf += offset;
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to_write = min (_length, cnt);
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} else {
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to_write = min (_length - (start - _position), cnt);
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}
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offset = start - _position;
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_out->read_at (crossfade_buffer_out, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
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_in->read_at (crossfade_buffer_in, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
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float* fiv = new float[to_write];
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float* fov = new float[to_write];
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_fade_in.get_vector (offset, offset+to_write, fiv, to_write);
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_fade_out.get_vector (offset, offset+to_write, fov, to_write);
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/* note: although we have not explicitly taken into account the return values
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from _out->read_at() or _in->read_at(), the length() function does this
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implicitly. why? because it computes a value based on the in+out regions'
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position and length, and so we know precisely how much data they could return.
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*/
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for (jack_nframes_t n = 0; n < to_write; ++n) {
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buf[n] = (crossfade_buffer_out[n] * fov[n]) + (crossfade_buffer_in[n] * fiv[n]);
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}
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delete [] fov;
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delete [] fiv;
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return to_write;
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}
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OverlapType
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Crossfade::coverage (jack_nframes_t start, jack_nframes_t end) const
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{
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jack_nframes_t my_end = _position + _length;
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if ((start >= _position) && (end <= my_end)) {
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return OverlapInternal;
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}
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if ((end >= _position) && (end <= my_end)) {
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return OverlapStart;
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}
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if ((start >= _position) && (start <= my_end)) {
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return OverlapEnd;
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}
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if ((_position >= start) && (_position <= end) && (my_end <= end)) {
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return OverlapExternal;
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}
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return OverlapNone;
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}
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void
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Crossfade::set_active (bool yn)
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{
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if (_active != yn) {
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_active = yn;
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save_state (_("active changed"));
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send_state_changed (ActiveChanged);
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}
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}
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bool
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Crossfade::refresh ()
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{
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/* crossfades must be between non-muted regions */
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if (_out->muted() || _in->muted()) {
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Invalidated (this);
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return false;
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}
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/* overlap type must be Start, End or External */
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OverlapType ot;
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ot = _in->coverage (_out->first_frame(), _out->last_frame());
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switch (ot) {
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case OverlapNone:
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case OverlapInternal:
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Invalidated (this);
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return false;
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default:
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break;
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}
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/* overlap type must not have altered */
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if (ot != overlap_type) {
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Invalidated (this);
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return false;
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}
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/* time to update */
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return update (false);
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}
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bool
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Crossfade::update (bool force)
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{
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jack_nframes_t newlen;
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bool save = false;
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if (_follow_overlap) {
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newlen = _out->first_frame() + _out->length() - _in->first_frame();
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} else {
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newlen = _length;
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}
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if (newlen == 0) {
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Invalidated (this);
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return false;
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}
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_in_update = true;
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if (force || (_follow_overlap && newlen != _length) || (_length > newlen)) {
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double factor = newlen / (double) _length;
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_fade_out.x_scale (factor);
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_fade_in.x_scale (factor);
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_length = newlen;
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save = true;
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}
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switch (_anchor_point) {
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case StartOfIn:
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if (_position != _in->first_frame()) {
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_position = _in->first_frame();
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save = true;
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}
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break;
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case EndOfIn:
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if (_position != _in->last_frame() - _length) {
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_position = _in->last_frame() - _length;
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save = true;
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}
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break;
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case EndOfOut:
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if (_position != _out->last_frame() - _length) {
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_position = _out->last_frame() - _length;
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save = true;
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}
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}
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if (save) {
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save_state ("updated");
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}
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/* UI's may need to know that the overlap changed even
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though the xfade length did not.
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*/
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send_state_changed (BoundsChanged); /* EMIT SIGNAL */
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_in_update = false;
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return true;
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}
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void
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Crossfade::member_changed (Change what_changed)
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{
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Change what_we_care_about = Change (Region::MuteChanged|
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Region::LayerChanged|
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ARDOUR::BoundsChanged);
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if (what_changed & what_we_care_about) {
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refresh ();
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}
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}
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Change
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|
Crossfade::restore_state (StateManager::State& state)
|
|
{
|
|
CrossfadeState* xfstate = dynamic_cast<CrossfadeState*> (&state);
|
|
Change what_changed = Change (0);
|
|
|
|
_in_update = true;
|
|
|
|
xfstate->fade_in_memento ();
|
|
xfstate->fade_out_memento ();
|
|
|
|
if (_length != xfstate->length) {
|
|
what_changed = Change (what_changed|LengthChanged);
|
|
_length = xfstate->length;
|
|
}
|
|
if (_active != xfstate->active) {
|
|
what_changed = Change (what_changed|ActiveChanged);
|
|
_active = xfstate->active;
|
|
}
|
|
if (_position != xfstate->position) {
|
|
what_changed = Change (what_changed|PositionChanged);
|
|
_position = xfstate->position;
|
|
}
|
|
|
|
/* XXX what to do about notifications for these? I don't
|
|
think (G)UI cares about them because they are
|
|
implicit in the bounds.
|
|
*/
|
|
|
|
_follow_overlap = xfstate->follow_overlap;
|
|
_anchor_point = xfstate->anchor_point;
|
|
|
|
_in_update = false;
|
|
|
|
return Change (what_changed);
|
|
}
|
|
|
|
StateManager::State*
|
|
Crossfade::state_factory (std::string why) const
|
|
{
|
|
CrossfadeState* state = new CrossfadeState (why);
|
|
|
|
state->fade_in_memento = _fade_in.get_memento ();
|
|
state->fade_out_memento = _fade_out.get_memento ();
|
|
state->active = _active;
|
|
state->length = _length;
|
|
state->position = _position;
|
|
state->follow_overlap = _follow_overlap;
|
|
state->anchor_point = _anchor_point;
|
|
|
|
return state;
|
|
}
|
|
|
|
UndoAction
|
|
Crossfade::get_memento() const
|
|
{
|
|
return sigc::bind (mem_fun (*(const_cast<Crossfade *> (this)), &StateManager::use_state), _current_state_id);
|
|
}
|
|
|
|
XMLNode&
|
|
Crossfade::get_state ()
|
|
{
|
|
XMLNode* node = new XMLNode (X_("Crossfade"));
|
|
XMLNode* child;
|
|
char buf[64];
|
|
LocaleGuard lg (X_("POSIX"));
|
|
|
|
snprintf (buf, sizeof(buf), "%" PRIu64, _out->id());
|
|
node->add_property ("out", buf);
|
|
snprintf (buf, sizeof(buf), "%" PRIu64, _in->id());
|
|
node->add_property ("in", buf);
|
|
node->add_property ("active", (_active ? "yes" : "no"));
|
|
node->add_property ("follow-overlap", (_follow_overlap ? "yes" : "no"));
|
|
node->add_property ("fixed", (_fixed ? "yes" : "no"));
|
|
snprintf (buf, sizeof(buf), "%" PRIu32, _length);
|
|
node->add_property ("length", buf);
|
|
snprintf (buf, sizeof(buf), "%" PRIu32, (uint32_t) _anchor_point);
|
|
node->add_property ("anchor-point", buf);
|
|
snprintf (buf, sizeof(buf), "%" PRIu32, (uint32_t) _position);
|
|
node->add_property ("position", buf);
|
|
|
|
child = node->add_child ("FadeIn");
|
|
|
|
for (AutomationList::iterator ii = _fade_in.begin(); ii != _fade_in.end(); ++ii) {
|
|
XMLNode* pnode;
|
|
|
|
pnode = new XMLNode ("point");
|
|
|
|
snprintf (buf, sizeof (buf), "%" PRIu32, (jack_nframes_t) floor ((*ii)->when));
|
|
pnode->add_property ("x", buf);
|
|
snprintf (buf, sizeof (buf), "%f", (*ii)->value);
|
|
pnode->add_property ("y", buf);
|
|
child->add_child_nocopy (*pnode);
|
|
}
|
|
|
|
child = node->add_child ("FadeOut");
|
|
|
|
for (AutomationList::iterator ii = _fade_out.begin(); ii != _fade_out.end(); ++ii) {
|
|
XMLNode* pnode;
|
|
|
|
pnode = new XMLNode ("point");
|
|
|
|
snprintf (buf, sizeof (buf), "%" PRIu32, (jack_nframes_t) floor ((*ii)->when));
|
|
pnode->add_property ("x", buf);
|
|
snprintf (buf, sizeof (buf), "%f", (*ii)->value);
|
|
pnode->add_property ("y", buf);
|
|
child->add_child_nocopy (*pnode);
|
|
}
|
|
|
|
return *node;
|
|
}
|
|
|
|
int
|
|
Crossfade::set_state (const XMLNode& node)
|
|
{
|
|
XMLNodeConstIterator i;
|
|
XMLNodeList children;
|
|
XMLNode* fi;
|
|
XMLNode* fo;
|
|
const XMLProperty* prop;
|
|
LocaleGuard lg (X_("POSIX"));
|
|
|
|
if ((prop = node.property ("position")) != 0) {
|
|
_position = atoi (prop->value().c_str());
|
|
} else {
|
|
warning << _("old-style crossfade information - no position information") << endmsg;
|
|
_position = _in->first_frame();
|
|
}
|
|
|
|
if ((prop = node.property ("active")) != 0) {
|
|
_active = (prop->value() == "yes");
|
|
} else {
|
|
_active = true;
|
|
}
|
|
|
|
if ((prop = node.property ("follow-overlap")) != 0) {
|
|
_follow_overlap = (prop->value() == "yes");
|
|
} else {
|
|
_follow_overlap = false;
|
|
}
|
|
|
|
if ((prop = node.property ("fixed")) != 0) {
|
|
_fixed = (prop->value() == "yes");
|
|
} else {
|
|
_fixed = false;
|
|
}
|
|
|
|
if ((prop = node.property ("anchor-point")) != 0) {
|
|
_anchor_point = AnchorPoint (atoi ((prop->value().c_str())));
|
|
} else {
|
|
_anchor_point = StartOfIn;
|
|
}
|
|
|
|
if ((prop = node.property ("length")) != 0) {
|
|
|
|
_length = atol (prop->value().c_str());
|
|
|
|
} else {
|
|
|
|
/* XXX this branch is legacy code from before
|
|
the point where we stored xfade lengths.
|
|
*/
|
|
|
|
if ((_length = overlap_length()) == 0) {
|
|
throw failed_constructor();
|
|
}
|
|
}
|
|
|
|
if ((fi = find_named_node (node, "FadeIn")) == 0) {
|
|
return -1;
|
|
}
|
|
|
|
if ((fo = find_named_node (node, "FadeOut")) == 0) {
|
|
return -1;
|
|
}
|
|
|
|
/* fade in */
|
|
|
|
_fade_in.clear ();
|
|
|
|
children = fi->children();
|
|
|
|
for (i = children.begin(); i != children.end(); ++i) {
|
|
if ((*i)->name() == "point") {
|
|
jack_nframes_t x;
|
|
float y;
|
|
|
|
prop = (*i)->property ("x");
|
|
sscanf (prop->value().c_str(), "%" PRIu32, &x);
|
|
|
|
prop = (*i)->property ("y");
|
|
sscanf (prop->value().c_str(), "%f", &y);
|
|
|
|
_fade_in.add (x, y);
|
|
}
|
|
}
|
|
|
|
/* fade out */
|
|
|
|
_fade_out.clear ();
|
|
|
|
children = fo->children();
|
|
|
|
for (i = children.begin(); i != children.end(); ++i) {
|
|
if ((*i)->name() == "point") {
|
|
jack_nframes_t x;
|
|
float y;
|
|
XMLProperty* prop;
|
|
|
|
prop = (*i)->property ("x");
|
|
sscanf (prop->value().c_str(), "%" PRIu32, &x);
|
|
|
|
prop = (*i)->property ("y");
|
|
sscanf (prop->value().c_str(), "%f", &y);
|
|
|
|
_fade_out.add (x, y);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool
|
|
Crossfade::can_follow_overlap () const
|
|
{
|
|
return !_fixed;
|
|
}
|
|
|
|
void
|
|
Crossfade::set_follow_overlap (bool yn)
|
|
{
|
|
if (yn == _follow_overlap || _fixed) {
|
|
return;
|
|
}
|
|
|
|
_follow_overlap = yn;
|
|
|
|
if (!yn) {
|
|
set_length (_short_xfade_length);
|
|
} else {
|
|
set_length (_out->first_frame() + _out->length() - _in->first_frame());
|
|
}
|
|
}
|
|
|
|
jack_nframes_t
|
|
Crossfade::set_length (jack_nframes_t len)
|
|
{
|
|
jack_nframes_t limit;
|
|
|
|
switch (_anchor_point) {
|
|
case StartOfIn:
|
|
limit = _in->length();
|
|
break;
|
|
|
|
case EndOfIn:
|
|
limit = _in->length();
|
|
break;
|
|
|
|
case EndOfOut:
|
|
limit = _out->length();
|
|
break;
|
|
|
|
}
|
|
|
|
len = min (limit, len);
|
|
|
|
double factor = len / (double) _length;
|
|
|
|
_in_update = true;
|
|
_fade_out.x_scale (factor);
|
|
_fade_in.x_scale (factor);
|
|
_in_update = false;
|
|
|
|
_length = len;
|
|
|
|
save_state ("length changed");
|
|
|
|
send_state_changed (LengthChanged);
|
|
|
|
return len;
|
|
}
|
|
|
|
jack_nframes_t
|
|
Crossfade::overlap_length () const
|
|
{
|
|
if (_fixed) {
|
|
return _length;
|
|
}
|
|
return _out->first_frame() + _out->length() - _in->first_frame();
|
|
}
|
|
|
|
void
|
|
Crossfade::set_short_xfade_length (jack_nframes_t n)
|
|
{
|
|
_short_xfade_length = n;
|
|
}
|