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>
35 #include <ardour/audioregion.h>
36 #include <ardour/session.h>
37 #include <ardour/gain.h>
38 #include <ardour/dB.h>
39 #include <ardour/playlist.h>
40 #include <ardour/audiofilter.h>
41 #include <ardour/audiosource.h>
47 using namespace ARDOUR;
49 /* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
51 Change AudioRegion::FadeInChanged = ARDOUR::new_change();
52 Change AudioRegion::FadeOutChanged = ARDOUR::new_change();
53 Change AudioRegion::FadeInActiveChanged = ARDOUR::new_change();
54 Change AudioRegion::FadeOutActiveChanged = ARDOUR::new_change();
55 Change AudioRegion::EnvelopeActiveChanged = ARDOUR::new_change();
56 Change AudioRegion::ScaleAmplitudeChanged = ARDOUR::new_change();
57 Change AudioRegion::EnvelopeChanged = ARDOUR::new_change();
59 AudioRegionState::AudioRegionState (string why)
61 , _fade_in (0.0, 2.0, 1.0, false)
62 , _fade_out (0.0, 2.0, 1.0, false)
63 , _envelope (0.0, 2.0, 1.0, false)
67 /** Basic AudioRegion constructor (one channel) */
68 AudioRegion::AudioRegion (AudioSource& src, jack_nframes_t start, jack_nframes_t length, bool announce)
69 : Region (src, start, length, PBD::basename_nosuffix(src.name()), DataType::AUDIO, 0, Region::Flag(Region::DefaultFlags|Region::External))
70 , _fade_in (0.0, 2.0, 1.0, false)
71 , _fade_out (0.0, 2.0, 1.0, false)
72 , _envelope (0.0, 2.0, 1.0, false)
74 _scale_amplitude = 1.0;
77 set_default_envelope ();
79 save_state ("initial state");
81 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
84 CheckNewRegion (this); /* EMIT SIGNAL */
88 /* Basic AudioRegion constructor (one channel) */
89 AudioRegion::AudioRegion (AudioSource& src, jack_nframes_t start, jack_nframes_t length, const string& name, layer_t layer, Flag flags, bool announce)
90 : Region (src, start, length, name, DataType::AUDIO, layer, flags)
91 , _fade_in (0.0, 2.0, 1.0, false)
92 , _fade_out (0.0, 2.0, 1.0, false)
93 , _envelope (0.0, 2.0, 1.0, false)
95 _scale_amplitude = 1.0;
98 set_default_envelope ();
99 save_state ("initial state");
101 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
104 CheckNewRegion (this); /* EMIT SIGNAL */
108 /* Basic AudioRegion constructor (many channels) */
109 AudioRegion::AudioRegion (SourceList& srcs, jack_nframes_t start, jack_nframes_t length, const string& name, layer_t layer, Flag flags, bool announce)
110 : Region (srcs, start, length, name, DataType::AUDIO, layer, flags)
111 , _fade_in (0.0, 2.0, 1.0, false)
112 , _fade_out (0.0, 2.0, 1.0, false)
113 , _envelope (0.0, 2.0, 1.0, false)
115 _scale_amplitude = 1.0;
117 set_default_fades ();
118 set_default_envelope ();
119 save_state ("initial state");
121 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
124 CheckNewRegion (this); /* EMIT SIGNAL */
129 /** Create a new AudioRegion, that is part of an existing one */
130 AudioRegion::AudioRegion (const AudioRegion& other, jack_nframes_t offset, jack_nframes_t length, const string& name, layer_t layer, Flag flags, bool announce)
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));
168 CheckNewRegion (this); /* EMIT SIGNAL */
172 AudioRegion::AudioRegion (const AudioRegion &other)
174 , _fade_in (other._fade_in)
175 , _fade_out (other._fade_out)
176 , _envelope (other._envelope)
178 _scale_amplitude = other._scale_amplitude;
179 _envelope = other._envelope;
181 _fade_in_disabled = 0;
182 _fade_out_disabled = 0;
184 save_state ("initial state");
186 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
188 /* NOTE: no CheckNewRegion signal emitted here. This is the copy constructor */
191 AudioRegion::AudioRegion (AudioSource& src, const XMLNode& node)
193 , _fade_in (0.0, 2.0, 1.0, false)
194 , _fade_out (0.0, 2.0, 1.0, false)
195 , _envelope (0.0, 2.0, 1.0, false)
197 set_default_fades ();
199 if (set_state (node)) {
200 throw failed_constructor();
203 save_state ("initial state");
205 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
207 assert(_type == DataType::AUDIO);
209 CheckNewRegion (this); /* EMIT SIGNAL */
212 AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
213 : Region (srcs, node),
214 _fade_in (0.0, 2.0, 1.0, false),
215 _fade_out (0.0, 2.0, 1.0, false),
216 _envelope (0.0, 2.0, 1.0, false)
218 set_default_fades ();
219 _scale_amplitude = 1.0;
221 if (set_state (node)) {
222 throw failed_constructor();
225 save_state ("initial state");
227 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
229 assert(_type == DataType::AUDIO);
231 CheckNewRegion (this); /* EMIT SIGNAL */
234 AudioRegion::~AudioRegion ()
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 } 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 } 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, jack_nframes_t npeaks, jack_nframes_t offset, jack_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 (jack_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, jack_nframes_t position,
364 uint32_t chan_n, jack_nframes_t read_frames, jack_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, jack_nframes_t position,
371 jack_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 jack_nframes_t position, jack_nframes_t cnt,
379 uint32_t chan_n, jack_nframes_t read_frames, jack_nframes_t skip_frames) const
381 jack_nframes_t internal_offset;
382 jack_nframes_t buf_offset;
383 jack_nframes_t to_read;
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 */
405 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
406 return 0; /* read nothing */
410 /* overwrite whatever is there */
411 mixdown_buffer = buf + buf_offset;
413 mixdown_buffer += buf_offset;
417 return 0; /* read nothing */
420 _read_data_count = 0;
422 AudioSource& src = audio_source(chan_n);
423 if (src.read (mixdown_buffer, _start + internal_offset, to_read) != to_read) {
424 return 0; /* "read nothing" */
427 _read_data_count += src.read_data_count();
431 if (_flags & FadeIn) {
433 jack_nframes_t fade_in_length = (jack_nframes_t) _fade_in.back()->when;
435 /* see if this read is within the fade in */
437 if (internal_offset < fade_in_length) {
439 jack_nframes_t limit;
441 limit = min (to_read, fade_in_length - internal_offset);
443 _fade_in.get_vector (internal_offset, internal_offset+limit, gain_buffer, limit);
445 for (jack_nframes_t n = 0; n < limit; ++n) {
446 mixdown_buffer[n] *= gain_buffer[n];
453 if (_flags & FadeOut) {
458 /* see if some part of this read is within the fade out */
460 /* ................. >| REGION
466 _length - fade_out_length
469 ^internal_offset + to_read
471 we need the intersection of [internal_offset,internal_offset+to_read] with
472 [_length - fade_out_length, _length]
477 jack_nframes_t fade_out_length = (jack_nframes_t) _fade_out.back()->when;
478 jack_nframes_t fade_interval_start = max(internal_offset, _length-fade_out_length);
479 jack_nframes_t fade_interval_end = min(internal_offset + to_read, _length);
481 if (fade_interval_end > fade_interval_start) {
482 /* (part of the) the fade out is in this buffer */
484 jack_nframes_t limit = fade_interval_end - fade_interval_start;
485 jack_nframes_t curve_offset = fade_interval_start - (_length-fade_out_length);
486 jack_nframes_t fade_offset = fade_interval_start - internal_offset;
488 _fade_out.get_vector (curve_offset,curve_offset+limit, gain_buffer, limit);
490 for (jack_nframes_t n = 0, m = fade_offset; n < limit; ++n, ++m) {
491 mixdown_buffer[m] *= gain_buffer[n];
497 /* Regular gain curves */
499 if (envelope_active()) {
500 _envelope.get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
502 if (_scale_amplitude != 1.0f) {
503 for (jack_nframes_t n = 0; n < to_read; ++n) {
504 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
507 for (jack_nframes_t n = 0; n < to_read; ++n) {
508 mixdown_buffer[n] *= gain_buffer[n];
511 } else if (_scale_amplitude != 1.0f) {
512 Session::apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
517 /* gack. the things we do for users.
522 for (jack_nframes_t n = 0; n < to_read; ++n) {
523 buf[n] += mixdown_buffer[n];
531 AudioRegion::state (bool full)
533 XMLNode& node (Region::state (full));
537 LocaleGuard lg (X_("POSIX"));
539 snprintf (buf, sizeof (buf), "0x%x", (int) _flags);
540 node.add_property ("flags", buf);
541 snprintf (buf, sizeof(buf), "%.12g", _scale_amplitude);
542 node.add_property ("scale-gain", buf);
544 for (uint32_t n=0; n < _sources.size(); ++n) {
545 snprintf (buf2, sizeof(buf2), "source-%d", n);
546 _sources[n]->id().print (buf);
547 node.add_property (buf2, buf);
550 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
551 node.add_property ("channels", buf);
555 child = node.add_child (X_("FadeIn"));
557 if ((_flags & DefaultFadeIn)) {
558 child->add_property (X_("default"), X_("yes"));
560 _fade_in.store_state (*child);
563 child = node.add_child (X_("FadeOut"));
565 if ((_flags & DefaultFadeOut)) {
566 child->add_property (X_("default"), X_("yes"));
568 _fade_out.store_state (*child);
572 child = node.add_child ("Envelope");
575 bool default_env = false;
577 // If there are only two points, the points are in the start of the region and the end of the region
578 // so, if they are both at 1.0f, that means the default region.
579 if (_envelope.size() == 2 &&
580 _envelope.front()->value == 1.0f &&
581 _envelope.back()->value==1.0f) {
582 if (_envelope.front()->when == 0 && _envelope.back()->when == _length) {
588 child->add_property ("default", "yes");
590 _envelope.store_state (*child);
593 child->add_property ("default", "yes");
596 if (full && _extra_xml) {
597 node.add_child_copy (*_extra_xml);
604 AudioRegion::set_state (const XMLNode& node)
606 const XMLNodeList& nlist = node.children();
607 const XMLProperty *prop;
608 LocaleGuard lg (X_("POSIX"));
610 Region::set_state (node);
612 if ((prop = node.property ("flags")) != 0) {
613 _flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
615 _flags = Flag (_flags & ~Region::LeftOfSplit);
616 _flags = Flag (_flags & ~Region::RightOfSplit);
619 if ((prop = node.property ("scale-gain")) != 0) {
620 _scale_amplitude = atof (prop->value().c_str());
622 _scale_amplitude = 1.0;
625 /* Now find envelope description and other misc child items */
627 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
634 if (child->name() == "Envelope") {
638 if ((prop = child->property ("default")) != 0) {
639 set_default_envelope ();
641 _envelope.load_state (*child);
644 _envelope.set_max_xval (_length);
645 _envelope.truncate_end (_length);
647 } else if (child->name() == "FadeIn") {
651 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
652 set_default_fade_in ();
655 _fade_in.load_state (*child);
658 } else if (child->name() == "FadeOut") {
662 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
663 set_default_fade_out ();
665 _fade_out.load_state (*child);
674 AudioRegion::set_fade_in_shape (FadeShape shape)
676 set_fade_in (shape, (jack_nframes_t) _fade_in.back()->when);
680 AudioRegion::set_fade_out_shape (FadeShape shape)
682 set_fade_out (shape, (jack_nframes_t) _fade_out.back()->when);
686 AudioRegion::set_fade_in (FadeShape shape, jack_nframes_t len)
693 _fade_in.add (0.0, 0.0);
694 _fade_in.add (len, 1.0);
699 _fade_in.add (len * 0.389401, 0.0333333);
700 _fade_in.add (len * 0.629032, 0.0861111);
701 _fade_in.add (len * 0.829493, 0.233333);
702 _fade_in.add (len * 0.9447, 0.483333);
703 _fade_in.add (len * 0.976959, 0.697222);
704 _fade_in.add (len, 1);
709 _fade_in.add (len * 0.0207373, 0.197222);
710 _fade_in.add (len * 0.0645161, 0.525);
711 _fade_in.add (len * 0.152074, 0.802778);
712 _fade_in.add (len * 0.276498, 0.919444);
713 _fade_in.add (len * 0.481567, 0.980556);
714 _fade_in.add (len * 0.767281, 1);
715 _fade_in.add (len, 1);
720 _fade_in.add (len * 0.0737327, 0.308333);
721 _fade_in.add (len * 0.246544, 0.658333);
722 _fade_in.add (len * 0.470046, 0.886111);
723 _fade_in.add (len * 0.652074, 0.972222);
724 _fade_in.add (len * 0.771889, 0.988889);
725 _fade_in.add (len, 1);
730 _fade_in.add (len * 0.304147, 0.0694444);
731 _fade_in.add (len * 0.529954, 0.152778);
732 _fade_in.add (len * 0.725806, 0.333333);
733 _fade_in.add (len * 0.847926, 0.558333);
734 _fade_in.add (len * 0.919355, 0.730556);
735 _fade_in.add (len, 1);
740 _fade_in_shape = shape;
743 save_state (_("fade in change"));
746 send_change (FadeInChanged);
750 AudioRegion::set_fade_out (FadeShape shape, jack_nframes_t len)
757 _fade_out.add (len * 0, 1);
758 _fade_out.add (len * 0.023041, 0.697222);
759 _fade_out.add (len * 0.0553, 0.483333);
760 _fade_out.add (len * 0.170507, 0.233333);
761 _fade_out.add (len * 0.370968, 0.0861111);
762 _fade_out.add (len * 0.610599, 0.0333333);
763 _fade_out.add (len * 1, 0);
767 _fade_out.add (len * 0, 1);
768 _fade_out.add (len * 0.228111, 0.988889);
769 _fade_out.add (len * 0.347926, 0.972222);
770 _fade_out.add (len * 0.529954, 0.886111);
771 _fade_out.add (len * 0.753456, 0.658333);
772 _fade_out.add (len * 0.9262673, 0.308333);
773 _fade_out.add (len * 1, 0);
777 _fade_out.add (len * 0, 1);
778 _fade_out.add (len * 0.305556, 1);
779 _fade_out.add (len * 0.548611, 0.991736);
780 _fade_out.add (len * 0.759259, 0.931129);
781 _fade_out.add (len * 0.918981, 0.68595);
782 _fade_out.add (len * 0.976852, 0.22865);
783 _fade_out.add (len * 1, 0);
787 _fade_out.add (len * 0, 1);
788 _fade_out.add (len * 0.080645, 0.730556);
789 _fade_out.add (len * 0.277778, 0.289256);
790 _fade_out.add (len * 0.470046, 0.152778);
791 _fade_out.add (len * 0.695853, 0.0694444);
792 _fade_out.add (len * 1, 0);
796 _fade_out.add (len * 0, 1);
797 _fade_out.add (len * 1, 0);
802 _fade_out_shape = shape;
805 save_state (_("fade in change"));
808 send_change (FadeOutChanged);
812 AudioRegion::set_fade_in_length (jack_nframes_t len)
814 bool changed = _fade_in.extend_to (len);
817 _flags = Flag (_flags & ~DefaultFadeIn);
821 snprintf (buf, sizeof (buf), "fade in length changed to %u", len);
825 send_change (FadeInChanged);
830 AudioRegion::set_fade_out_length (jack_nframes_t len)
832 bool changed = _fade_out.extend_to (len);
835 _flags = Flag (_flags & ~DefaultFadeOut);
839 snprintf (buf, sizeof (buf), "fade out length changed to %u", len);
844 send_change (FadeOutChanged);
848 AudioRegion::set_fade_in_active (bool yn)
850 if (yn == (_flags & FadeIn)) {
854 _flags = Flag (_flags|FadeIn);
856 _flags = Flag (_flags & ~FadeIn);
859 send_change (FadeInActiveChanged);
863 AudioRegion::set_fade_out_active (bool yn)
865 if (yn == (_flags & FadeOut)) {
869 _flags = Flag (_flags | FadeOut);
871 _flags = Flag (_flags & ~FadeOut);
874 send_change (FadeOutActiveChanged);
878 AudioRegion::set_default_fade_in ()
880 set_fade_in (Linear, 64);
884 AudioRegion::set_default_fade_out ()
886 set_fade_out (Linear, 64);
890 AudioRegion::set_default_fades ()
892 _fade_in_disabled = 0;
893 _fade_out_disabled = 0;
894 set_default_fade_in ();
895 set_default_fade_out ();
899 AudioRegion::set_default_envelope ()
903 _envelope.add (0, 1.0f);
904 _envelope.add (_length, 1.0f);
909 AudioRegion::recompute_at_end ()
911 /* our length has changed. recompute a new final point by interpolating
912 based on the the existing curve.
916 _envelope.truncate_end (_length);
917 _envelope.set_max_xval (_length);
920 if (_fade_in.back()->when > _length) {
921 _fade_in.extend_to (_length);
922 send_change (FadeInChanged);
925 if (_fade_out.back()->when > _length) {
926 _fade_out.extend_to (_length);
927 send_change (FadeOutChanged);
932 AudioRegion::recompute_at_start ()
934 /* as above, but the shift was from the front */
936 _envelope.truncate_start (_length);
938 if (_fade_in.back()->when > _length) {
939 _fade_in.extend_to (_length);
940 send_change (FadeInChanged);
943 if (_fade_out.back()->when > _length) {
944 _fade_out.extend_to (_length);
945 send_change (FadeOutChanged);
950 AudioRegion::separate_by_channel (Session& session, vector<AudioRegion*>& v) const
955 for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
960 /* generate a new name */
962 if (session.region_name (new_name, _name)) {
966 /* create a copy with just one source */
968 v.push_back (new AudioRegion (srcs, _start, _length, new_name, _layer, _flags));
975 AudioRegion::apply (AudioFilter& filter)
977 return filter.run (*this);
981 AudioRegion::exportme (Session& session, AudioExportSpecification& spec)
983 const jack_nframes_t blocksize = 4096;
984 jack_nframes_t to_read;
987 spec.channels = _sources.size();
989 if (spec.prepare (blocksize, session.frame_rate())) {
994 spec.total_frames = _length;
996 while (spec.pos < _length && !spec.stop) {
999 /* step 1: interleave */
1001 to_read = min (_length - spec.pos, blocksize);
1003 if (spec.channels == 1) {
1005 if (audio_source().read (spec.dataF, _start + spec.pos, to_read) != to_read) {
1011 Sample buf[blocksize];
1013 for (uint32_t chan = 0; chan < spec.channels; ++chan) {
1015 if (audio_source(chan).read (buf, _start + spec.pos, to_read) != to_read) {
1019 for (jack_nframes_t x = 0; x < to_read; ++x) {
1020 spec.dataF[chan+(x*spec.channels)] = buf[x];
1025 if (spec.process (to_read)) {
1029 spec.pos += to_read;
1030 spec.progress = (double) spec.pos /_length;
1037 spec.running = false;
1038 spec.status = status;
1045 AudioRegion::set_scale_amplitude (gain_t g)
1047 _scale_amplitude = g;
1049 /* tell the diskstream we're in */
1052 _playlist->Modified();
1055 /* tell everybody else */
1057 send_change (ScaleAmplitudeChanged);
1061 AudioRegion::normalize_to (float target_dB)
1063 const jack_nframes_t blocksize = 64 * 1024;
1064 Sample buf[blocksize];
1065 jack_nframes_t fpos;
1066 jack_nframes_t fend;
1067 jack_nframes_t to_read;
1069 gain_t target = dB_to_coefficient (target_dB);
1071 if (target == 1.0f) {
1072 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1073 that we may have clipped.
1075 target -= FLT_EPSILON;
1079 fend = _start + _length;
1081 /* first pass: find max amplitude */
1083 while (fpos < fend) {
1087 to_read = min (fend - fpos, blocksize);
1089 for (n = 0; n < n_channels(); ++n) {
1093 if (audio_source (n).read (buf, fpos, to_read) != to_read) {
1097 maxamp = Session::compute_peak (buf, to_read, maxamp);
1103 if (maxamp == 0.0f) {
1104 /* don't even try */
1108 if (maxamp == target) {
1109 /* we can't do anything useful */
1113 /* compute scale factor */
1115 _scale_amplitude = target/maxamp;
1119 snprintf (buf, sizeof (buf), _("normalized to %.2fdB"), target_dB);
1123 /* tell the diskstream we're in */
1126 _playlist->Modified();
1129 /* tell everybody else */
1131 send_change (ScaleAmplitudeChanged);
1135 AudioRegion::envelope_changed (Change ignored)
1137 save_state (_("envelope change"));
1138 send_change (EnvelopeChanged);
1142 AudioRegion::suspend_fade_in ()
1144 if (++_fade_in_disabled == 1) {
1145 set_fade_in_active (false);
1150 AudioRegion::resume_fade_in ()
1152 if (_fade_in_disabled && --_fade_in_disabled == 0) {
1153 set_fade_in_active (true);
1158 AudioRegion::suspend_fade_out ()
1160 if (++_fade_out_disabled == 1) {
1161 set_fade_out_active (false);
1166 AudioRegion::resume_fade_out ()
1168 if (_fade_out_disabled && --_fade_out_disabled == 0) {
1169 set_fade_out_active (true);
1174 AudioRegion::speed_mismatch (float sr) const
1176 if (_sources.empty()) {
1177 /* impossible, but ... */
1181 float fsr = audio_source().sample_rate();
1187 AudioRegion::audio_source (uint32_t n) const
1189 // Guaranteed to succeed (use a static cast?)
1190 return dynamic_cast<AudioSource&>(source(n));
1195 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)
1197 return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (jack_nframes_t) npeaks, (jack_nframes_t) start, (jack_nframes_t) cnt, n_chan,samples_per_unit);
1200 uint32_t region_length_from_c (void *arg)
1203 return ((AudioRegion *) arg)->length();
1206 uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
1208 return ( (AudioRegion *) arg)->audio_source().available_peaks (zoom_factor) ;