2 Copyright (C) 2000-2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <sigc++/bind.h>
28 #include <sigc++/class_slot.h>
30 #include <glibmm/thread.h>
32 #include <pbd/basename.h>
33 #include <pbd/xml++.h>
34 #include <pbd/stacktrace.h>
36 #include <ardour/audioregion.h>
37 #include <ardour/session.h>
38 #include <ardour/gain.h>
39 #include <ardour/dB.h>
40 #include <ardour/playlist.h>
41 #include <ardour/audiofilter.h>
42 #include <ardour/audiofilesource.h>
43 #include <ardour/destructive_filesource.h>
49 using namespace ARDOUR;
51 /* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
53 Change AudioRegion::FadeInChanged = ARDOUR::new_change();
54 Change AudioRegion::FadeOutChanged = ARDOUR::new_change();
55 Change AudioRegion::FadeInActiveChanged = ARDOUR::new_change();
56 Change AudioRegion::FadeOutActiveChanged = ARDOUR::new_change();
57 Change AudioRegion::EnvelopeActiveChanged = ARDOUR::new_change();
58 Change AudioRegion::ScaleAmplitudeChanged = ARDOUR::new_change();
59 Change AudioRegion::EnvelopeChanged = ARDOUR::new_change();
61 AudioRegionState::AudioRegionState (string why)
63 , _fade_in (0.0, 2.0, 1.0, false)
64 , _fade_out (0.0, 2.0, 1.0, false)
65 , _envelope (0.0, 2.0, 1.0, false)
69 /** Basic AudioRegion constructor (one channel) */
70 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, nframes_t start, nframes_t length)
71 : Region (src, start, length, PBD::basename_nosuffix(src->name()), DataType::AUDIO, 0, Region::Flag(Region::DefaultFlags|Region::External)),
72 _fade_in (0.0, 2.0, 1.0, false),
73 _fade_out (0.0, 2.0, 1.0, false),
74 _envelope (0.0, 2.0, 1.0, false)
76 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
78 afs->HeaderPositionOffsetChanged.connect (mem_fun (*this, &AudioRegion::source_offset_changed));
81 _scale_amplitude = 1.0;
84 set_default_envelope ();
86 save_state ("initial state");
88 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
91 /* Basic AudioRegion constructor (one channel) */
92 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
93 : Region (src, start, length, name, DataType::AUDIO, layer, flags)
94 , _fade_in (0.0, 2.0, 1.0, false)
95 , _fade_out (0.0, 2.0, 1.0, false)
96 , _envelope (0.0, 2.0, 1.0, false)
98 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
100 afs->HeaderPositionOffsetChanged.connect (mem_fun (*this, &AudioRegion::source_offset_changed));
103 _scale_amplitude = 1.0;
105 set_default_fades ();
106 set_default_envelope ();
107 save_state ("initial state");
109 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
112 /* Basic AudioRegion constructor (many channels) */
113 AudioRegion::AudioRegion (SourceList& srcs, nframes_t start, nframes_t length, const string& name, layer_t layer, Flag flags)
114 : Region (srcs, start, length, name, DataType::AUDIO, layer, flags)
115 , _fade_in (0.0, 2.0, 1.0, false)
116 , _fade_out (0.0, 2.0, 1.0, false)
117 , _envelope (0.0, 2.0, 1.0, false)
119 _scale_amplitude = 1.0;
121 set_default_fades ();
122 set_default_envelope ();
123 save_state ("initial state");
125 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
129 /** Create a new AudioRegion, that is part of an existing one */
130 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, nframes_t offset, nframes_t length, const string& name, layer_t layer, Flag flags)
131 : Region (other, offset, length, name, layer, flags),
132 _fade_in (other->_fade_in),
133 _fade_out (other->_fade_out),
134 _envelope (other->_envelope, (double) offset, (double) offset + length)
136 /* return to default fades if the existing ones are too long */
137 _fade_in_disabled = 0;
138 _fade_out_disabled = 0;
141 if (_flags & LeftOfSplit) {
142 if (_fade_in.back()->when >= _length) {
143 set_default_fade_in ();
145 _fade_in_disabled = other->_fade_in_disabled;
147 set_default_fade_out ();
148 _flags = Flag (_flags & ~Region::LeftOfSplit);
151 if (_flags & RightOfSplit) {
152 if (_fade_out.back()->when >= _length) {
153 set_default_fade_out ();
155 _fade_out_disabled = other->_fade_out_disabled;
157 set_default_fade_in ();
158 _flags = Flag (_flags & ~Region::RightOfSplit);
161 _scale_amplitude = other->_scale_amplitude;
163 save_state ("initial state");
165 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
167 assert(_type == DataType::AUDIO);
170 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
172 _fade_in (other->_fade_in),
173 _fade_out (other->_fade_out),
174 _envelope (other->_envelope)
176 _scale_amplitude = other->_scale_amplitude;
177 _envelope = other->_envelope;
179 _fade_in_disabled = 0;
180 _fade_out_disabled = 0;
182 save_state ("initial state");
184 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
186 assert(_type == DataType::AUDIO);
189 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, const XMLNode& node)
191 , _fade_in (0.0, 2.0, 1.0, false)
192 , _fade_out (0.0, 2.0, 1.0, false)
193 , _envelope (0.0, 2.0, 1.0, false)
195 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (src);
197 afs->HeaderPositionOffsetChanged.connect (mem_fun (*this, &AudioRegion::source_offset_changed));
200 set_default_fades ();
202 if (set_state (node)) {
203 throw failed_constructor();
206 save_state ("initial state");
208 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
210 assert(_type == DataType::AUDIO);
213 AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
214 : Region (srcs, node),
215 _fade_in (0.0, 2.0, 1.0, false),
216 _fade_out (0.0, 2.0, 1.0, false),
217 _envelope (0.0, 2.0, 1.0, false)
219 set_default_fades ();
220 _scale_amplitude = 1.0;
222 if (set_state (node)) {
223 throw failed_constructor();
226 save_state ("initial state");
228 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
230 assert(_type == DataType::AUDIO);
233 AudioRegion::~AudioRegion ()
236 GoingAway (); /* EMIT SIGNAL */
240 AudioRegion::state_factory (std::string why) const
242 AudioRegionState* state = new AudioRegionState (why);
244 Region::store_state (*state);
246 state->_fade_in = _fade_in;
247 state->_fade_out = _fade_out;
248 state->_envelope = _envelope;
249 state->_scale_amplitude = _scale_amplitude;
250 state->_fade_in_disabled = _fade_in_disabled;
251 state->_fade_out_disabled = _fade_out_disabled;
257 AudioRegion::restore_state (StateManager::State& sstate)
259 AudioRegionState* state = dynamic_cast<AudioRegionState*> (&sstate);
261 Change what_changed = Region::restore_and_return_flags (*state);
263 if (_flags != Flag (state->_flags)) {
265 uint32_t old_flags = _flags;
267 _flags = Flag (state->_flags);
269 if ((old_flags ^ state->_flags) & EnvelopeActive) {
270 what_changed = Change (what_changed|EnvelopeActiveChanged);
274 if (!(_fade_in == state->_fade_in)) {
275 _fade_in = state->_fade_in;
276 what_changed = Change (what_changed|FadeInChanged);
279 if (!(_fade_out == state->_fade_out)) {
280 _fade_out = state->_fade_out;
281 what_changed = Change (what_changed|FadeOutChanged);
284 if (_scale_amplitude != state->_scale_amplitude) {
285 _scale_amplitude = state->_scale_amplitude;
286 what_changed = Change (what_changed|ScaleAmplitudeChanged);
289 if (_fade_in_disabled != state->_fade_in_disabled) {
290 if (_fade_in_disabled == 0 && state->_fade_in_disabled) {
291 set_fade_in_active (false);
292 } else if (_fade_in_disabled && state->_fade_in_disabled == 0) {
293 set_fade_in_active (true);
295 _fade_in_disabled = state->_fade_in_disabled;
298 if (_fade_out_disabled != state->_fade_out_disabled) {
299 if (_fade_out_disabled == 0 && state->_fade_out_disabled) {
300 set_fade_out_active (false);
301 } else if (_fade_out_disabled && state->_fade_out_disabled == 0) {
302 set_fade_out_active (true);
304 _fade_out_disabled = state->_fade_out_disabled;
307 /* XXX need a way to test stored state versus current for envelopes */
309 _envelope = state->_envelope;
310 what_changed = Change (what_changed);
316 AudioRegion::get_memento() const
318 return sigc::bind (mem_fun (*(const_cast<AudioRegion *> (this)), &StateManager::use_state), _current_state_id);
322 AudioRegion::set_envelope_active (bool yn)
324 if (envelope_active() != yn) {
327 snprintf (buf, sizeof (buf), "envelope active");
328 _flags = Flag (_flags|EnvelopeActive);
330 snprintf (buf, sizeof (buf), "envelope off");
331 _flags = Flag (_flags & ~EnvelopeActive);
336 send_change (EnvelopeActiveChanged);
342 AudioRegion::read_peaks (PeakData *buf, nframes_t npeaks, nframes_t offset, nframes_t cnt, uint32_t chan_n, double samples_per_unit) const
344 if (chan_n >= _sources.size()) {
348 if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, samples_per_unit)) {
351 if (_scale_amplitude != 1.0) {
352 for (nframes_t n = 0; n < npeaks; ++n) {
353 buf[n].max *= _scale_amplitude;
354 buf[n].min *= _scale_amplitude;
362 AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, nframes_t position,
364 uint32_t chan_n, nframes_t read_frames, nframes_t skip_frames) const
366 return _read_at (_sources, buf, mixdown_buffer, gain_buffer, position, cnt, chan_n, read_frames, skip_frames);
370 AudioRegion::master_read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, nframes_t position,
371 nframes_t cnt, uint32_t chan_n) const
373 return _read_at (_master_sources, buf, mixdown_buffer, gain_buffer, position, cnt, chan_n, 0, 0);
377 AudioRegion::_read_at (const SourceList& srcs, Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
378 nframes_t position, nframes_t cnt,
379 uint32_t chan_n, nframes_t read_frames, nframes_t skip_frames) const
381 nframes_t internal_offset;
382 nframes_t buf_offset;
385 /* precondition: caller has verified that we cover the desired section */
387 if (chan_n >= _sources.size()) {
388 return 0; /* read nothing */
391 if (position < _position) {
393 buf_offset = _position - position;
396 internal_offset = position - _position;
400 if (internal_offset >= _length) {
401 return 0; /* read nothing */
404 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
405 return 0; /* read nothing */
409 /* overwrite whatever is there */
410 mixdown_buffer = buf + buf_offset;
412 mixdown_buffer += buf_offset;
416 return 0; /* read nothing */
419 _read_data_count = 0;
421 boost::shared_ptr<AudioSource> src = audio_source(chan_n);
422 if (src->read (mixdown_buffer, _start + internal_offset, to_read) != to_read) {
423 return 0; /* "read nothing" */
426 _read_data_count += src->read_data_count();
430 if (_flags & FadeIn) {
432 nframes_t fade_in_length = (nframes_t) _fade_in.back()->when;
434 /* see if this read is within the fade in */
436 if (internal_offset < fade_in_length) {
440 limit = min (to_read, fade_in_length - internal_offset);
442 _fade_in.get_vector (internal_offset, internal_offset+limit, gain_buffer, limit);
444 for (nframes_t n = 0; n < limit; ++n) {
445 mixdown_buffer[n] *= gain_buffer[n];
452 if (_flags & FadeOut) {
454 /* see if some part of this read is within the fade out */
456 /* ................. >| REGION
462 _length - fade_out_length
465 ^internal_offset + to_read
467 we need the intersection of [internal_offset,internal_offset+to_read] with
468 [_length - fade_out_length, _length]
473 nframes_t fade_out_length = (nframes_t) _fade_out.back()->when;
474 nframes_t fade_interval_start = max(internal_offset, _length-fade_out_length);
475 nframes_t fade_interval_end = min(internal_offset + to_read, _length);
477 if (fade_interval_end > fade_interval_start) {
478 /* (part of the) the fade out is in this buffer */
480 nframes_t limit = fade_interval_end - fade_interval_start;
481 nframes_t curve_offset = fade_interval_start - (_length-fade_out_length);
482 nframes_t fade_offset = fade_interval_start - internal_offset;
484 _fade_out.get_vector (curve_offset,curve_offset+limit, gain_buffer, limit);
486 for (nframes_t n = 0, m = fade_offset; n < limit; ++n, ++m) {
487 mixdown_buffer[m] *= gain_buffer[n];
493 /* Regular gain curves */
495 if (envelope_active()) {
496 _envelope.get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
498 if (_scale_amplitude != 1.0f) {
499 for (nframes_t n = 0; n < to_read; ++n) {
500 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
503 for (nframes_t n = 0; n < to_read; ++n) {
504 mixdown_buffer[n] *= gain_buffer[n];
507 } else if (_scale_amplitude != 1.0f) {
508 Session::apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
513 /* gack. the things we do for users.
518 for (nframes_t n = 0; n < to_read; ++n) {
519 buf[n] += mixdown_buffer[n];
527 AudioRegion::state (bool full)
529 XMLNode& node (Region::state (full));
533 LocaleGuard lg (X_("POSIX"));
535 snprintf (buf, sizeof (buf), "0x%x", (int) _flags);
536 node.add_property ("flags", buf);
537 snprintf (buf, sizeof(buf), "%.12g", _scale_amplitude);
538 node.add_property ("scale-gain", buf);
540 for (uint32_t n=0; n < _sources.size(); ++n) {
541 snprintf (buf2, sizeof(buf2), "source-%d", n);
542 _sources[n]->id().print (buf, sizeof (buf));
543 node.add_property (buf2, buf);
546 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
547 node.add_property ("channels", buf);
551 child = node.add_child (X_("FadeIn"));
553 if ((_flags & DefaultFadeIn)) {
554 child->add_property (X_("default"), X_("yes"));
556 _fade_in.store_state (*child);
559 child = node.add_child (X_("FadeOut"));
561 if ((_flags & DefaultFadeOut)) {
562 child->add_property (X_("default"), X_("yes"));
564 _fade_out.store_state (*child);
568 child = node.add_child ("Envelope");
571 bool default_env = false;
573 // If there are only two points, the points are in the start of the region and the end of the region
574 // so, if they are both at 1.0f, that means the default region.
575 if (_envelope.size() == 2 &&
576 _envelope.front()->value == 1.0f &&
577 _envelope.back()->value==1.0f) {
578 if (_envelope.front()->when == 0 && _envelope.back()->when == _length) {
584 child->add_property ("default", "yes");
586 _envelope.store_state (*child);
589 child->add_property ("default", "yes");
592 if (full && _extra_xml) {
593 node.add_child_copy (*_extra_xml);
600 AudioRegion::set_state (const XMLNode& node)
602 const XMLNodeList& nlist = node.children();
603 const XMLProperty *prop;
604 LocaleGuard lg (X_("POSIX"));
606 Region::set_state (node);
608 if ((prop = node.property ("flags")) != 0) {
609 _flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
611 _flags = Flag (_flags & ~Region::LeftOfSplit);
612 _flags = Flag (_flags & ~Region::RightOfSplit);
615 if ((prop = node.property ("scale-gain")) != 0) {
616 _scale_amplitude = atof (prop->value().c_str());
618 _scale_amplitude = 1.0;
621 /* Now find envelope description and other misc child items */
623 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
630 if (child->name() == "Envelope") {
634 if ((prop = child->property ("default")) != 0) {
635 set_default_envelope ();
637 _envelope.load_state (*child);
640 _envelope.set_max_xval (_length);
641 _envelope.truncate_end (_length);
643 } else if (child->name() == "FadeIn") {
647 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
648 set_default_fade_in ();
651 _fade_in.load_state (*child);
654 } else if (child->name() == "FadeOut") {
658 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
659 set_default_fade_out ();
661 _fade_out.load_state (*child);
670 AudioRegion::set_fade_in_shape (FadeShape shape)
672 set_fade_in (shape, (nframes_t) _fade_in.back()->when);
676 AudioRegion::set_fade_out_shape (FadeShape shape)
678 set_fade_out (shape, (nframes_t) _fade_out.back()->when);
682 AudioRegion::set_fade_in (FadeShape shape, nframes_t len)
689 _fade_in.add (0.0, 0.0);
690 _fade_in.add (len, 1.0);
695 _fade_in.add (len * 0.389401, 0.0333333);
696 _fade_in.add (len * 0.629032, 0.0861111);
697 _fade_in.add (len * 0.829493, 0.233333);
698 _fade_in.add (len * 0.9447, 0.483333);
699 _fade_in.add (len * 0.976959, 0.697222);
700 _fade_in.add (len, 1);
705 _fade_in.add (len * 0.0207373, 0.197222);
706 _fade_in.add (len * 0.0645161, 0.525);
707 _fade_in.add (len * 0.152074, 0.802778);
708 _fade_in.add (len * 0.276498, 0.919444);
709 _fade_in.add (len * 0.481567, 0.980556);
710 _fade_in.add (len * 0.767281, 1);
711 _fade_in.add (len, 1);
716 _fade_in.add (len * 0.0737327, 0.308333);
717 _fade_in.add (len * 0.246544, 0.658333);
718 _fade_in.add (len * 0.470046, 0.886111);
719 _fade_in.add (len * 0.652074, 0.972222);
720 _fade_in.add (len * 0.771889, 0.988889);
721 _fade_in.add (len, 1);
726 _fade_in.add (len * 0.304147, 0.0694444);
727 _fade_in.add (len * 0.529954, 0.152778);
728 _fade_in.add (len * 0.725806, 0.333333);
729 _fade_in.add (len * 0.847926, 0.558333);
730 _fade_in.add (len * 0.919355, 0.730556);
731 _fade_in.add (len, 1);
736 _fade_in_shape = shape;
739 save_state (_("fade in change"));
742 send_change (FadeInChanged);
746 AudioRegion::set_fade_out (FadeShape shape, nframes_t len)
753 _fade_out.add (len * 0, 1);
754 _fade_out.add (len * 0.023041, 0.697222);
755 _fade_out.add (len * 0.0553, 0.483333);
756 _fade_out.add (len * 0.170507, 0.233333);
757 _fade_out.add (len * 0.370968, 0.0861111);
758 _fade_out.add (len * 0.610599, 0.0333333);
759 _fade_out.add (len * 1, 0);
763 _fade_out.add (len * 0, 1);
764 _fade_out.add (len * 0.228111, 0.988889);
765 _fade_out.add (len * 0.347926, 0.972222);
766 _fade_out.add (len * 0.529954, 0.886111);
767 _fade_out.add (len * 0.753456, 0.658333);
768 _fade_out.add (len * 0.9262673, 0.308333);
769 _fade_out.add (len * 1, 0);
773 _fade_out.add (len * 0, 1);
774 _fade_out.add (len * 0.305556, 1);
775 _fade_out.add (len * 0.548611, 0.991736);
776 _fade_out.add (len * 0.759259, 0.931129);
777 _fade_out.add (len * 0.918981, 0.68595);
778 _fade_out.add (len * 0.976852, 0.22865);
779 _fade_out.add (len * 1, 0);
783 _fade_out.add (len * 0, 1);
784 _fade_out.add (len * 0.080645, 0.730556);
785 _fade_out.add (len * 0.277778, 0.289256);
786 _fade_out.add (len * 0.470046, 0.152778);
787 _fade_out.add (len * 0.695853, 0.0694444);
788 _fade_out.add (len * 1, 0);
792 _fade_out.add (len * 0, 1);
793 _fade_out.add (len * 1, 0);
798 _fade_out_shape = shape;
801 save_state (_("fade in change"));
804 send_change (FadeOutChanged);
808 AudioRegion::set_fade_in_length (nframes_t len)
810 bool changed = _fade_in.extend_to (len);
813 _flags = Flag (_flags & ~DefaultFadeIn);
817 snprintf (buf, sizeof (buf), "fade in length changed to %u", len);
821 send_change (FadeInChanged);
826 AudioRegion::set_fade_out_length (nframes_t len)
828 bool changed = _fade_out.extend_to (len);
831 _flags = Flag (_flags & ~DefaultFadeOut);
835 snprintf (buf, sizeof (buf), "fade out length changed to %u", len);
840 send_change (FadeOutChanged);
844 AudioRegion::set_fade_in_active (bool yn)
846 if (yn == (_flags & FadeIn)) {
850 _flags = Flag (_flags|FadeIn);
852 _flags = Flag (_flags & ~FadeIn);
855 send_change (FadeInActiveChanged);
859 AudioRegion::set_fade_out_active (bool yn)
861 if (yn == (_flags & FadeOut)) {
865 _flags = Flag (_flags | FadeOut);
867 _flags = Flag (_flags & ~FadeOut);
870 send_change (FadeOutActiveChanged);
874 AudioRegion::set_default_fade_in ()
876 set_fade_in (Linear, 64);
880 AudioRegion::set_default_fade_out ()
882 set_fade_out (Linear, 64);
886 AudioRegion::set_default_fades ()
888 _fade_in_disabled = 0;
889 _fade_out_disabled = 0;
890 set_default_fade_in ();
891 set_default_fade_out ();
895 AudioRegion::set_default_envelope ()
899 _envelope.add (0, 1.0f);
900 _envelope.add (_length, 1.0f);
905 AudioRegion::recompute_at_end ()
907 /* our length has changed. recompute a new final point by interpolating
908 based on the the existing curve.
912 _envelope.truncate_end (_length);
913 _envelope.set_max_xval (_length);
916 if (_fade_in.back()->when > _length) {
917 _fade_in.extend_to (_length);
918 send_change (FadeInChanged);
921 if (_fade_out.back()->when > _length) {
922 _fade_out.extend_to (_length);
923 send_change (FadeOutChanged);
928 AudioRegion::recompute_at_start ()
930 /* as above, but the shift was from the front */
932 _envelope.truncate_start (_length);
934 if (_fade_in.back()->when > _length) {
935 _fade_in.extend_to (_length);
936 send_change (FadeInChanged);
939 if (_fade_out.back()->when > _length) {
940 _fade_out.extend_to (_length);
941 send_change (FadeOutChanged);
946 AudioRegion::separate_by_channel (Session& session, vector<AudioRegion*>& v) const
951 for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
956 /* generate a new name */
958 if (session.region_name (new_name, _name)) {
962 /* create a copy with just one source */
964 v.push_back (new AudioRegion (srcs, _start, _length, new_name, _layer, _flags));
971 AudioRegion::apply (AudioFilter& filter)
973 return filter.run (boost::shared_ptr<AudioRegion> (this));
977 AudioRegion::exportme (Session& session, AudioExportSpecification& spec)
979 const nframes_t blocksize = 4096;
983 spec.channels = _sources.size();
985 if (spec.prepare (blocksize, session.frame_rate())) {
990 spec.total_frames = _length;
992 while (spec.pos < _length && !spec.stop) {
995 /* step 1: interleave */
997 to_read = min (_length - spec.pos, blocksize);
999 if (spec.channels == 1) {
1001 if (audio_source()->read (spec.dataF, _start + spec.pos, to_read) != to_read) {
1007 Sample buf[blocksize];
1009 for (uint32_t chan = 0; chan < spec.channels; ++chan) {
1011 if (audio_source(chan)->read (buf, _start + spec.pos, to_read) != to_read) {
1015 for (nframes_t x = 0; x < to_read; ++x) {
1016 spec.dataF[chan+(x*spec.channels)] = buf[x];
1021 if (spec.process (to_read)) {
1025 spec.pos += to_read;
1026 spec.progress = (double) spec.pos /_length;
1033 spec.running = false;
1034 spec.status = status;
1041 AudioRegion::set_scale_amplitude (gain_t g)
1043 _scale_amplitude = g;
1045 /* tell the diskstream we're in */
1048 _playlist->Modified();
1051 /* tell everybody else */
1053 send_change (ScaleAmplitudeChanged);
1057 AudioRegion::normalize_to (float target_dB)
1059 const nframes_t blocksize = 64 * 1024;
1060 Sample buf[blocksize];
1065 gain_t target = dB_to_coefficient (target_dB);
1067 if (target == 1.0f) {
1068 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1069 that we may have clipped.
1071 target -= FLT_EPSILON;
1075 fend = _start + _length;
1077 /* first pass: find max amplitude */
1079 while (fpos < fend) {
1083 to_read = min (fend - fpos, blocksize);
1085 for (n = 0; n < n_channels(); ++n) {
1089 if (audio_source (n)->read (buf, fpos, to_read) != to_read) {
1093 maxamp = Session::compute_peak (buf, to_read, maxamp);
1099 if (maxamp == 0.0f) {
1100 /* don't even try */
1104 if (maxamp == target) {
1105 /* we can't do anything useful */
1109 /* compute scale factor */
1111 _scale_amplitude = target/maxamp;
1115 snprintf (buf, sizeof (buf), _("normalized to %.2fdB"), target_dB);
1119 /* tell the diskstream we're in */
1122 _playlist->Modified();
1125 /* tell everybody else */
1127 send_change (ScaleAmplitudeChanged);
1131 AudioRegion::envelope_changed (Change ignored)
1133 save_state (_("envelope change"));
1134 send_change (EnvelopeChanged);
1138 AudioRegion::suspend_fade_in ()
1140 if (++_fade_in_disabled == 1) {
1141 set_fade_in_active (false);
1146 AudioRegion::resume_fade_in ()
1148 if (_fade_in_disabled && --_fade_in_disabled == 0) {
1149 set_fade_in_active (true);
1154 AudioRegion::suspend_fade_out ()
1156 if (++_fade_out_disabled == 1) {
1157 set_fade_out_active (false);
1162 AudioRegion::resume_fade_out ()
1164 if (_fade_out_disabled && --_fade_out_disabled == 0) {
1165 set_fade_out_active (true);
1170 AudioRegion::speed_mismatch (float sr) const
1172 if (_sources.empty()) {
1173 /* impossible, but ... */
1177 float fsr = audio_source()->sample_rate();
1183 AudioRegion::source_offset_changed ()
1185 if (boost::dynamic_pointer_cast<DestructiveFileSource>(_sources.front())) {
1186 set_start (source()->natural_position(), this);
1187 set_position (source()->natural_position(), this);
1191 boost::shared_ptr<AudioSource>
1192 AudioRegion::audio_source (uint32_t n) const
1194 // Guaranteed to succeed (use a static cast?)
1195 return boost::dynamic_pointer_cast<AudioSource>(source(n));
1200 int region_read_peaks_from_c (void *arg, uint32_t npeaks, uint32_t start, uint32_t cnt, intptr_t data, uint32_t n_chan, double samples_per_unit)
1202 return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (nframes_t) npeaks, (nframes_t) start, (nframes_t) cnt, n_chan,samples_per_unit);
1205 uint32_t region_length_from_c (void *arg)
1208 return ((AudioRegion *) arg)->length();
1211 uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
1213 return ( (AudioRegion *) arg)->audio_source()->available_peaks (zoom_factor) ;