/*
- Copyright (C) 2003-2006 Paul Davis
+ Copyright (C) 2003-2006 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
return (_in == other._in) && (_out == other._out);
}
-Crossfade::Crossfade (boost::shared_ptr<AudioRegion> in, boost::shared_ptr<AudioRegion> out,
+Crossfade::Crossfade (boost::shared_ptr<AudioRegion> in, boost::shared_ptr<AudioRegion> out,
nframes_t length,
nframes_t position,
AnchorPoint ap)
error << _("Crossfade: no \"in\" region in state") << endmsg;
throw failed_constructor();
}
-
+
PBD::ID id (prop->value());
if ((r = playlist.find_region (id)) == 0) {
<< endmsg;
throw failed_constructor();
}
-
+
if ((_in = boost::dynamic_pointer_cast<AudioRegion> (r)) == 0) {
throw failed_constructor();
}
<< endmsg;
throw failed_constructor();
}
-
+
if ((_out = boost::dynamic_pointer_cast<AudioRegion> (r)) == 0) {
throw failed_constructor();
}
_length = 0;
initialize();
_active = true;
-
+
if (set_state (node)) {
throw failed_constructor();
}
_anchor_point = orig->_anchor_point;
_follow_overlap = orig->_follow_overlap;
_fixed = orig->_fixed;
-
+
_in = newin;
_out = newout;
// copied from Crossfade::initialize()
_in_update = false;
-
+
_out->suspend_fade_out ();
_in->suspend_fade_in ();
_sources.insert (_sources.end(), _out->sources().begin(), _out->sources().end());
_master_sources = _in->master_sources();
_master_sources.insert(_master_sources.end(), _out->master_sources().begin(), _out->master_sources().end());
-
+
_in_update = false;
-
+
_out->suspend_fade_out ();
_in->suspend_fade_in ();
#endif
_fade_out.thaw ();
-
+
_fade_in.freeze ();
_fade_in.clear ();
overlap_type = _in->coverage (_out->position(), _out->last_frame());
layer_relation = (int32_t) (_in->layer() - _out->layer());
-}
+}
-nframes_t
+nframes_t
Crossfade::read_raw_internal (Sample* /*buf*/, sframes_t /*start*/, nframes_t cnt, int /*channel*/) const
{
// FIXME: Why is this disabled?
return cnt;
}
-nframes_t
-Crossfade::read_at (Sample *buf, Sample *mixdown_buffer,
+nframes_t
+Crossfade::read_at (Sample *buf, Sample *mixdown_buffer,
float *gain_buffer, sframes_t start, nframes_t cnt, uint32_t chan_n,
nframes_t read_frames, nframes_t skip_frames) const
{
} else {
return 0;
}
-
+
start = _position;
buf += offset;
to_write = min (_length, cnt);
} else {
-
+
to_write = min (nframes_t(_length - (start - _position)), cnt);
-
+
}
offset = start - _position;
/* note: although we have not explicitly taken into account the return values
from _out->read_at() or _in->read_at(), the length() function does this
implicitly. why? because it computes a value based on the in+out regions'
- position and length, and so we know precisely how much data they could return.
+ position and length, and so we know precisely how much data they could return.
*/
for (nframes_t n = 0; n < to_write; ++n) {
delete [] fiv;
return to_write;
-}
+}
-OverlapType
+OverlapType
Crossfade::coverage (nframes_t start, nframes_t end) const
{
nframes_t my_end = _position + _length;
Crossfade::refresh ()
{
/* crossfades must be between non-muted regions */
-
+
if (_out->muted() || _in->muted()) {
Invalidated (shared_from_this ());
return false;
}
/* Top layer shouldn't be transparent */
-
+
if (!((layer_relation > 0 ? _in : _out)->opaque())) {
Invalidated (shared_from_this());
return false;
if (ot == OverlapNone) {
Invalidated (shared_from_this ());
return false;
- }
+ }
bool send_signal;
try {
compute (_in, _out, _session.config.get_xfade_model());
- }
+ }
catch (NoCrossfadeHere& err) {
Invalidated (shared_from_this ());
Crossfade::update ()
{
nframes_t newlen;
-
+
if (_follow_overlap) {
newlen = _out->first_frame() + _out->length() - _in->first_frame();
} else {
newlen = _length;
}
-
+
if (newlen == 0) {
Invalidated (shared_from_this ());
return false;
}
-
+
_in_update = true;
-
+
if ((_follow_overlap && newlen != _length) || (_length > newlen)) {
-
+
double factor = newlen / (double) _length;
-
+
_fade_out.x_scale (factor);
_fade_in.x_scale (factor);
-
+
_length = newlen;
- }
-
+ }
+
switch (_anchor_point) {
case StartOfIn:
_position = _in->first_frame();
break;
-
+
case EndOfIn:
_position = _in->last_frame() - _length;
break;
-
+
case EndOfOut:
_position = _out->last_frame() - _length;
}
boost::shared_ptr<AudioRegion> bottom;
nframes_t short_xfade_length;
- short_xfade_length = _short_xfade_length;
+ short_xfade_length = _short_xfade_length;
if (a->layer() < b->layer()) {
top = b;
top = a;
bottom = b;
}
-
+
/* first check for matching ends */
-
+
if (top->first_frame() == bottom->first_frame()) {
/* Both regions start at the same point */
-
+
if (top->last_frame() < bottom->last_frame()) {
-
+
/* top ends before bottom, so put an xfade
in at the end of top.
*/
-
+
/* [-------- top ---------- ]
* {====== bottom =====================}
*/
} else {
/* top ends after (or same time) as bottom - no xfade
*/
-
+
/* [-------- top ------------------------ ]
* {====== bottom =====================}
*/
throw NoCrossfadeHere();
}
-
+
} else if (top->last_frame() == bottom->last_frame()) {
-
+
/* Both regions end at the same point */
-
+
if (top->first_frame() > bottom->first_frame()) {
-
+
/* top starts after bottom, put an xfade in at the
start of top
*/
-
+
/* [-------- top ---------- ]
* {====== bottom =====================}
*/
_anchor_point = StartOfIn;
_active = true;
_fixed = true;
-
+
} else {
/* top starts before bottom - no xfade
*/
}
} else {
-
+
/* OK, time to do more regular overlapping */
OverlapType ot = top->coverage (bottom->first_frame(), bottom->last_frame());
*/
throw NoCrossfadeHere();
break;
-
+
case OverlapInternal:
case OverlapExternal:
/* should be NOTREACHED because of tests above */
throw NoCrossfadeHere();
break;
-
+
case OverlapEnd: /* top covers start of bottom but ends within it */
- /* [---- top ------------------------]
- * { ==== bottom ============ }
- */
+ /* [---- top ------------------------]
+ * { ==== bottom ============ }
+ */
_in = bottom;
_out = top;
_follow_overlap = true;
} else {
_length = min (short_xfade_length, top->length());
- _position = top->last_frame() - _length; // "]" - length
+ _position = top->last_frame() - _length; // "]" - length
_active = true;
_follow_overlap = false;
-
+
}
break;
-
+
case OverlapStart: /* top starts within bottom but covers bottom's end */
- /* { ==== top ============ }
- * [---- bottom -------------------]
+ /* { ==== top ============ }
+ * [---- bottom -------------------]
*/
_in = top;
_length = min (short_xfade_length, top->length());
_active = true;
_follow_overlap = false;
-
+
}
-
+
break;
}
}
-
+
return 0;
}
XMLNode&
-Crossfade::get_state ()
+Crossfade::get_state ()
{
XMLNode* node = new XMLNode (X_("Crossfade"));
XMLNode* child;
}
if ((prop = node.property ("active")) != 0) {
- bool x = (prop->value() == "yes");
+ bool x = string_is_affirmative (prop->value());
if (x != _active) {
_active = x;
what_changed = Change (what_changed | ActiveChanged);
}
if ((prop = node.property ("follow-overlap")) != 0) {
- _follow_overlap = (prop->value() == "yes");
+ _follow_overlap = string_is_affirmative (prop->value());
} else {
_follow_overlap = false;
}
if ((prop = node.property ("fixed")) != 0) {
- _fixed = (prop->value() == "yes");
+ _fixed = string_is_affirmative (prop->value());
} else {
_fixed = false;
}
}
} 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.freeze ();
_fade_in.clear ();
-
+
children = fi->children();
-
+
for (i = children.begin(); i != children.end(); ++i) {
if ((*i)->name() == "point") {
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.thaw ();
-
+
/* fade out */
-
+
_fade_out.freeze ();
_fade_out.clear ();
children = fo->children();
-
+
for (i = children.begin(); i != children.end(); ++i) {
if ((*i)->name() == "point") {
nframes_t x;
prop = (*i)->property ("y");
sscanf (prop->value().c_str(), "%f", &y);
-
+
_fade_out.add (x, y);
}
}
case EndOfOut:
limit = _out->length();
break;
-
+
}
len = min (limit, len);
_fade_out.x_scale (factor);
_fade_in.x_scale (factor);
_in_update = false;
-
+
_length = len;
StateChanged (LengthChanged);
projects / ardour.git / blobdiff