#include <sigc++/bind.h>
+#include <pbd/stacktrace.h>
+
#include <ardour/types.h>
#include <ardour/crossfade.h>
#include <ardour/crossfade_compare.h>
{
_in = in;
_out = out;
+
_length = length;
_position = position;
_anchor_point = ap;
- switch (Config->get_xfade_model()) {
- case ShortCrossfade:
- _follow_overlap = false;
- break;
- default:
- _follow_overlap = true;
- }
+ _follow_overlap = false;
_active = Config->get_xfades_active ();
_fixed = true;
_active = act;
initialize ();
-
}
Crossfade::Crossfade (const Playlist& playlist, XMLNode& node)
_in->suspend_fade_in ();
overlap_type = _in->coverage (_out->position(), _out->last_frame());
+ layer_relation = (int32_t) (_in->layer() - _out->layer());
// Let's make sure the fade isn't too long
set_length(_length);
Crossfade::~Crossfade ()
{
- Invalidated (this);
+ notify_callbacks ();
}
void
_fade_in.add (_length, 1.0);
_fade_in.thaw ();
- _in->StateChanged.connect (sigc::mem_fun (*this, &Crossfade::member_changed));
- _out->StateChanged.connect (sigc::mem_fun (*this, &Crossfade::member_changed));
-
overlap_type = _in->coverage (_out->position(), _out->last_frame());
+ layer_relation = (int32_t) (_in->layer() - _out->layer());
}
+nframes_t
+Crossfade::read_at (Sample *buf, Sample *mixdown_buffer,
+ float *gain_buffer, nframes_t start, nframes_t cnt, uint32_t chan_n,
+ nframes_t read_frames, nframes_t skip_frames)
+{
+ nframes_t offset;
+ nframes_t to_write;
+
+ if (!_active) {
+ return 0;
+ }
+
+ if (start < _position) {
+
+ /* handle an initial section of the read area that we do not
+ cover.
+ */
+
+ offset = _position - start;
+
+ if (offset < cnt) {
+ cnt -= offset;
+ } else {
+ return 0;
+ }
+
+ start = _position;
+ buf += offset;
+ to_write = min (_length, cnt);
+
+ } else {
+
+ to_write = min (_length - (start - _position), cnt);
+
+ }
+
+ offset = start - _position;
+
+ _out->read_at (crossfade_buffer_out, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
+ _in->read_at (crossfade_buffer_in, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
+
+ float* fiv = new float[to_write];
+ float* fov = new float[to_write];
+
+ _fade_in.get_vector (offset, offset+to_write, fiv, to_write);
+ _fade_out.get_vector (offset, offset+to_write, fov, to_write);
+
+ /* 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.
+ */
+
+ for (nframes_t n = 0; n < to_write; ++n) {
+ buf[n] = (crossfade_buffer_out[n] * fov[n]) + (crossfade_buffer_in[n] * fiv[n]);
+ }
+
+ delete [] fov;
+ delete [] fiv;
+
+ return to_write;
+}
+
+OverlapType
+Crossfade::coverage (nframes_t start, nframes_t end) const
+{
+ nframes_t my_end = _position + _length;
+
+ if ((start >= _position) && (end <= my_end)) {
+ return OverlapInternal;
+ }
+ if ((end >= _position) && (end <= my_end)) {
+ return OverlapStart;
+ }
+ if ((start >= _position) && (start <= my_end)) {
+ return OverlapEnd;
+ }
+ if ((_position >= start) && (_position <= end) && (my_end <= end)) {
+ return OverlapExternal;
+ }
+ return OverlapNone;
+}
+
+void
+Crossfade::set_active (bool yn)
+{
+ if (_active != yn) {
+ _active = yn;
+ StateChanged (ActiveChanged);
+ }
+}
+
+bool
+Crossfade::refresh ()
+{
+ /* crossfades must be between non-muted regions */
+
+ if (_out->muted() || _in->muted()) {
+ Invalidated (shared_from_this());
+ return false;
+ }
+
+ /* layer ordering cannot change */
+
+ int32_t new_layer_relation = (int32_t) (_in->layer() - _out->layer());
+
+ if (new_layer_relation * layer_relation < 0) { // different sign, layers rotated
+ Invalidated (shared_from_this());
+ return false;
+ }
+
+ OverlapType ot = _in->coverage (_out->first_frame(), _out->last_frame());
+
+ if (ot == OverlapNone) {
+ Invalidated (shared_from_this());
+ return false;
+ }
+
+ bool send_signal;
+
+ if (ot != overlap_type) {
+
+ if (_follow_overlap) {
+
+ try {
+ compute (_in, _out, Config->get_xfade_model());
+ }
+
+ catch (NoCrossfadeHere& err) {
+ Invalidated (shared_from_this());
+ return false;
+ }
+
+ send_signal = true;
+
+ } else {
+
+ Invalidated (shared_from_this());
+ return false;
+ }
+
+ } else {
+
+ send_signal = update ();
+ }
+
+ if (send_signal) {
+ StateChanged (BoundsChanged); /* EMIT SIGNAL */
+ }
+
+ _in_update = false;
+
+ return true;
+}
+
+bool
+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;
+ }
+
+ return true;
+}
+
int
Crossfade::compute (boost::shared_ptr<AudioRegion> a, boost::shared_ptr<AudioRegion> b, CrossfadeModel model)
{
/* 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()) {
_in = bottom;
_out = top;
- _position = bottom->first_frame();
_anchor_point = StartOfIn;
if (model == FullCrossfade) {
+ _position = bottom->first_frame(); // "{"
_length = _out->first_frame() + _out->length() - _in->first_frame();
/* leave active alone */
_follow_overlap = true;
} else {
_length = min (short_xfade_length, top->length());
+ _position = top->last_frame() - _length; // "]" - length
_active = true;
_follow_overlap = false;
return 0;
}
-nframes_t
-Crossfade::read_at (Sample *buf, Sample *mixdown_buffer,
- float *gain_buffer, nframes_t start, nframes_t cnt, uint32_t chan_n,
- nframes_t read_frames, nframes_t skip_frames)
-{
- nframes_t offset;
- nframes_t to_write;
-
- if (!_active) {
- return 0;
- }
-
- if (start < _position) {
-
- /* handle an initial section of the read area that we do not
- cover.
- */
-
- offset = _position - start;
-
- if (offset < cnt) {
- cnt -= offset;
- } else {
- return 0;
- }
-
- start = _position;
- buf += offset;
- to_write = min (_length, cnt);
-
- } else {
-
- to_write = min (_length - (start - _position), cnt);
-
- }
-
- offset = start - _position;
-
- _out->read_at (crossfade_buffer_out, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
- _in->read_at (crossfade_buffer_in, mixdown_buffer, gain_buffer, start, to_write, chan_n, read_frames, skip_frames);
-
- float* fiv = new float[to_write];
- float* fov = new float[to_write];
-
- _fade_in.get_vector (offset, offset+to_write, fiv, to_write);
- _fade_out.get_vector (offset, offset+to_write, fov, to_write);
-
- /* 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.
- */
-
- for (nframes_t n = 0; n < to_write; ++n) {
- buf[n] = (crossfade_buffer_out[n] * fov[n]) + (crossfade_buffer_in[n] * fiv[n]);
- }
-
- delete [] fov;
- delete [] fiv;
-
- return to_write;
-}
-
-OverlapType
-Crossfade::coverage (nframes_t start, nframes_t end) const
-{
- nframes_t my_end = _position + _length;
-
- if ((start >= _position) && (end <= my_end)) {
- return OverlapInternal;
- }
- if ((end >= _position) && (end <= my_end)) {
- return OverlapStart;
- }
- if ((start >= _position) && (start <= my_end)) {
- return OverlapEnd;
- }
- if ((_position >= start) && (_position <= end) && (my_end <= end)) {
- return OverlapExternal;
- }
- return OverlapNone;
-}
-
-void
-Crossfade::set_active (bool yn)
-{
- if (_active != yn) {
- _active = yn;
- StateChanged (ActiveChanged);
- }
-}
-
-bool
-Crossfade::refresh ()
-{
- /* crossfades must be between non-muted regions */
-
- if (_out->muted() || _in->muted()) {
- Invalidated (this);
- return false;
- }
-
- /* overlap type must be Start, End or External */
-
- OverlapType ot;
-
- ot = _in->coverage (_out->first_frame(), _out->last_frame());
-
- switch (ot) {
- case OverlapNone:
- case OverlapInternal:
- Invalidated (this);
- return false;
-
- default:
- break;
- }
-
- /* overlap type must not have altered */
-
- if (ot != overlap_type) {
- Invalidated (this);
- return false;
- }
-
- /* time to update */
-
- return update (false);
-}
-
-bool
-Crossfade::update (bool force)
-{
- nframes_t newlen;
-
- if (_follow_overlap) {
- newlen = _out->first_frame() + _out->length() - _in->first_frame();
- } else {
- newlen = _length;
- }
-
- if (newlen == 0) {
- Invalidated (this);
- return false;
- }
-
- _in_update = true;
-
- if (force || (_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:
- if (_position != _in->first_frame()) {
- _position = _in->first_frame();
- }
- break;
-
- case EndOfIn:
- if (_position != _in->last_frame() - _length) {
- _position = _in->last_frame() - _length;
- }
- break;
-
- case EndOfOut:
- if (_position != _out->last_frame() - _length) {
- _position = _out->last_frame() - _length;
- }
- }
-
- /* UI's may need to know that the overlap changed even
- though the xfade length did not.
- */
-
- StateChanged (BoundsChanged); /* EMIT SIGNAL */
-
- _in_update = false;
-
- return true;
-}
-
-void
-Crossfade::member_changed (Change what_changed)
-{
- Change what_we_care_about = Change (Region::MuteChanged|
- Region::LayerChanged|
- BoundsChanged);
-
- if (what_changed & what_we_care_about) {
- refresh ();
- }
-}
-
XMLNode&
Crossfade::get_state ()
{
/* fade out */
- _fade_in.freeze ();
+ _fade_out.freeze ();
_fade_out.clear ();
children = fo->children();
void
Crossfade::invalidate ()
{
- Invalidated (this); /* EMIT SIGNAL */
+ Invalidated (shared_from_this()); /* EMIT SIGNAL */
}
projects / ardour.git / blobdiff