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 <boost/scoped_array.hpp>
29 #include <glibmm/threads.h>
31 #include "pbd/basename.h"
32 #include "pbd/xml++.h"
33 #include "pbd/stacktrace.h"
34 #include "pbd/enumwriter.h"
35 #include "pbd/convert.h"
37 #include "evoral/Curve.hpp"
39 #include "ardour/audioregion.h"
40 #include "ardour/session.h"
41 #include "ardour/dB.h"
42 #include "ardour/debug.h"
43 #include "ardour/event_type_map.h"
44 #include "ardour/playlist.h"
45 #include "ardour/audiofilesource.h"
46 #include "ardour/region_factory.h"
47 #include "ardour/runtime_functions.h"
48 #include "ardour/transient_detector.h"
49 #include "ardour/parameter_descriptor.h"
50 #include "ardour/progress.h"
56 using namespace ARDOUR;
60 namespace Properties {
61 PBD::PropertyDescriptor<bool> envelope_active;
62 PBD::PropertyDescriptor<bool> default_fade_in;
63 PBD::PropertyDescriptor<bool> default_fade_out;
64 PBD::PropertyDescriptor<bool> fade_in_active;
65 PBD::PropertyDescriptor<bool> fade_out_active;
66 PBD::PropertyDescriptor<float> scale_amplitude;
67 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_in;
68 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_in;
69 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_out;
70 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_out;
71 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > envelope;
75 /* Curve manipulations */
78 reverse_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
80 size_t len = src->back()->when;
81 for (Evoral::ControlList::const_reverse_iterator it = src->rbegin(); it!=src->rend(); it++) {
82 dst->fast_simple_add (len - (*it)->when, (*it)->value);
87 generate_inverse_power_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
89 // calc inverse curve using sum of squares
90 for (Evoral::ControlList::const_iterator it = src->begin(); it!=src->end(); ++it ) {
91 float value = (*it)->value;
92 value = 1 - powf(value,2);
94 dst->fast_simple_add ( (*it)->when, value );
99 generate_db_fade (boost::shared_ptr<Evoral::ControlList> dst, double len, int num_steps, float dB_drop)
102 dst->fast_simple_add (0, 1);
104 //generate a fade-out curve by successively applying a gain drop
105 float fade_speed = dB_to_coefficient(dB_drop / (float) num_steps);
106 for (int i = 1; i < (num_steps-1); i++) {
107 float coeff = GAIN_COEFF_UNITY;
108 for (int j = 0; j < i; j++) {
111 dst->fast_simple_add (len*(double)i/(double)num_steps, coeff);
114 dst->fast_simple_add (len, GAIN_COEFF_SMALL);
118 merge_curves (boost::shared_ptr<Evoral::ControlList> dst,
119 boost::shared_ptr<const Evoral::ControlList> curve1,
120 boost::shared_ptr<const Evoral::ControlList> curve2)
122 Evoral::ControlList::EventList::size_type size = curve1->size();
124 //curve lengths must match for now
125 if (size != curve2->size()) {
129 Evoral::ControlList::const_iterator c1 = curve1->begin();
131 for (Evoral::ControlList::const_iterator c2 = curve2->begin(); c2!=curve2->end(); c2++ ) {
132 float v1 = accurate_coefficient_to_dB((*c1)->value);
133 float v2 = accurate_coefficient_to_dB((*c2)->value);
135 double interp = v1 * ( 1.0-( (double)count / (double)size) );
136 interp += v2 * ( (double)count / (double)size );
138 interp = dB_to_coefficient(interp);
139 dst->fast_simple_add ( (*c1)->when, interp );
146 AudioRegion::make_property_quarks ()
148 Properties::envelope_active.property_id = g_quark_from_static_string (X_("envelope-active"));
149 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for envelope-active = %1\n", Properties::envelope_active.property_id));
150 Properties::default_fade_in.property_id = g_quark_from_static_string (X_("default-fade-in"));
151 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-in = %1\n", Properties::default_fade_in.property_id));
152 Properties::default_fade_out.property_id = g_quark_from_static_string (X_("default-fade-out"));
153 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-out = %1\n", Properties::default_fade_out.property_id));
154 Properties::fade_in_active.property_id = g_quark_from_static_string (X_("fade-in-active"));
155 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-active = %1\n", Properties::fade_in_active.property_id));
156 Properties::fade_out_active.property_id = g_quark_from_static_string (X_("fade-out-active"));
157 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-active = %1\n", Properties::fade_out_active.property_id));
158 Properties::scale_amplitude.property_id = g_quark_from_static_string (X_("scale-amplitude"));
159 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for scale-amplitude = %1\n", Properties::scale_amplitude.property_id));
160 Properties::fade_in.property_id = g_quark_from_static_string (X_("FadeIn"));
161 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for FadeIn = %1\n", Properties::fade_in.property_id));
162 Properties::inverse_fade_in.property_id = g_quark_from_static_string (X_("InverseFadeIn"));
163 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for InverseFadeIn = %1\n", Properties::inverse_fade_in.property_id));
164 Properties::fade_out.property_id = g_quark_from_static_string (X_("FadeOut"));
165 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for FadeOut = %1\n", Properties::fade_out.property_id));
166 Properties::inverse_fade_out.property_id = g_quark_from_static_string (X_("InverseFadeOut"));
167 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for InverseFadeOut = %1\n", Properties::inverse_fade_out.property_id));
168 Properties::envelope.property_id = g_quark_from_static_string (X_("Envelope"));
169 DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for Envelope = %1\n", Properties::envelope.property_id));
173 AudioRegion::register_properties ()
175 /* no need to register parent class properties */
177 add_property (_envelope_active);
178 add_property (_default_fade_in);
179 add_property (_default_fade_out);
180 add_property (_fade_in_active);
181 add_property (_fade_out_active);
182 add_property (_scale_amplitude);
183 add_property (_fade_in);
184 add_property (_inverse_fade_in);
185 add_property (_fade_out);
186 add_property (_inverse_fade_out);
187 add_property (_envelope);
190 #define AUDIOREGION_STATE_DEFAULT \
191 _envelope_active (Properties::envelope_active, false) \
192 , _default_fade_in (Properties::default_fade_in, true) \
193 , _default_fade_out (Properties::default_fade_out, true) \
194 , _fade_in_active (Properties::fade_in_active, true) \
195 , _fade_out_active (Properties::fade_out_active, true) \
196 , _scale_amplitude (Properties::scale_amplitude, 1.0) \
197 , _fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeInAutomation)))) \
198 , _inverse_fade_in (Properties::inverse_fade_in, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeInAutomation)))) \
199 , _fade_out (Properties::fade_out, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeOutAutomation)))) \
200 , _inverse_fade_out (Properties::inverse_fade_out, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeOutAutomation))))
202 #define AUDIOREGION_COPY_STATE(other) \
203 _envelope_active (Properties::envelope_active, other->_envelope_active) \
204 , _default_fade_in (Properties::default_fade_in, other->_default_fade_in) \
205 , _default_fade_out (Properties::default_fade_out, other->_default_fade_out) \
206 , _fade_in_active (Properties::fade_in_active, other->_fade_in_active) \
207 , _fade_out_active (Properties::fade_out_active, other->_fade_out_active) \
208 , _scale_amplitude (Properties::scale_amplitude, other->_scale_amplitude) \
209 , _fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_fade_in.val()))) \
210 , _inverse_fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_inverse_fade_in.val()))) \
211 , _fade_out (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_fade_out.val()))) \
212 , _inverse_fade_out (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_inverse_fade_out.val())))
213 /* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
218 register_properties ();
220 suspend_property_changes();
221 set_default_fades ();
222 set_default_envelope ();
223 resume_property_changes();
225 listen_to_my_curves ();
226 connect_to_analysis_changed ();
227 connect_to_header_position_offset_changed ();
230 /** Constructor for use by derived types only */
231 AudioRegion::AudioRegion (Session& s, framepos_t start, framecnt_t len, std::string name)
232 : Region (s, start, len, name, DataType::AUDIO)
233 , AUDIOREGION_STATE_DEFAULT
234 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter(EnvelopeAutomation))))
236 , _fade_in_suspended (0)
237 , _fade_out_suspended (0)
240 assert (_sources.size() == _master_sources.size());
243 /** Basic AudioRegion constructor */
244 AudioRegion::AudioRegion (const SourceList& srcs)
246 , AUDIOREGION_STATE_DEFAULT
247 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter(EnvelopeAutomation))))
248 , _automatable(srcs[0]->session())
249 , _fade_in_suspended (0)
250 , _fade_out_suspended (0)
253 assert (_sources.size() == _master_sources.size());
256 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
258 , AUDIOREGION_COPY_STATE (other)
259 /* As far as I can see, the _envelope's times are relative to region position, and have nothing
260 to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
262 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val(), 0, other->_length)))
263 , _automatable (other->session())
264 , _fade_in_suspended (0)
265 , _fade_out_suspended (0)
267 /* don't use init here, because we got fade in/out from the other region
269 register_properties ();
270 listen_to_my_curves ();
271 connect_to_analysis_changed ();
272 connect_to_header_position_offset_changed ();
274 assert(_type == DataType::AUDIO);
275 assert (_sources.size() == _master_sources.size());
278 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, framecnt_t offset)
279 : Region (other, offset)
280 , AUDIOREGION_COPY_STATE (other)
281 /* As far as I can see, the _envelope's times are relative to region position, and have nothing
282 to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
284 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val(), offset, other->_length)))
285 , _automatable (other->session())
286 , _fade_in_suspended (0)
287 , _fade_out_suspended (0)
289 /* don't use init here, because we got fade in/out from the other region
291 register_properties ();
292 listen_to_my_curves ();
293 connect_to_analysis_changed ();
294 connect_to_header_position_offset_changed ();
296 assert(_type == DataType::AUDIO);
297 assert (_sources.size() == _master_sources.size());
300 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, const SourceList& srcs)
301 : Region (boost::static_pointer_cast<const Region>(other), srcs)
302 , AUDIOREGION_COPY_STATE (other)
303 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val())))
304 , _automatable (other->session())
305 , _fade_in_suspended (0)
306 , _fade_out_suspended (0)
308 /* make-a-sort-of-copy-with-different-sources constructor (used by audio filter) */
310 register_properties ();
312 listen_to_my_curves ();
313 connect_to_analysis_changed ();
314 connect_to_header_position_offset_changed ();
316 assert (_sources.size() == _master_sources.size());
319 AudioRegion::AudioRegion (SourceList& srcs)
321 , AUDIOREGION_STATE_DEFAULT
322 , _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList(Evoral::Parameter(EnvelopeAutomation))))
323 , _automatable(srcs[0]->session())
324 , _fade_in_suspended (0)
325 , _fade_out_suspended (0)
329 assert(_type == DataType::AUDIO);
330 assert (_sources.size() == _master_sources.size());
333 AudioRegion::~AudioRegion ()
338 AudioRegion::post_set (const PropertyChange& /*ignored*/)
341 _sync_position = _start;
344 /* return to default fades if the existing ones are too long */
346 if (_left_of_split) {
347 if (_fade_in->back()->when >= _length) {
348 set_default_fade_in ();
350 set_default_fade_out ();
351 _left_of_split = false;
354 if (_right_of_split) {
355 if (_fade_out->back()->when >= _length) {
356 set_default_fade_out ();
359 set_default_fade_in ();
360 _right_of_split = false;
363 /* If _length changed, adjust our gain envelope accordingly */
364 _envelope->truncate_end (_length);
368 AudioRegion::connect_to_analysis_changed ()
370 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
371 (*i)->AnalysisChanged.connect_same_thread (*this, boost::bind (&AudioRegion::invalidate_transients, this));
376 AudioRegion::connect_to_header_position_offset_changed ()
378 set<boost::shared_ptr<Source> > unique_srcs;
380 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
382 /* connect only once to HeaderPositionOffsetChanged, even if sources are replicated
385 if (unique_srcs.find (*i) == unique_srcs.end ()) {
386 unique_srcs.insert (*i);
387 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (*i);
389 afs->HeaderPositionOffsetChanged.connect_same_thread (*this, boost::bind (&AudioRegion::source_offset_changed, this));
396 AudioRegion::listen_to_my_curves ()
398 _envelope->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::envelope_changed, this));
399 _fade_in->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_in_changed, this));
400 _fade_out->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_out_changed, this));
404 AudioRegion::set_envelope_active (bool yn)
406 if (envelope_active() != yn) {
407 _envelope_active = yn;
408 send_change (PropertyChange (Properties::envelope_active));
412 /** @param buf Buffer to put peak data in.
413 * @param npeaks Number of peaks to read (ie the number of PeakDatas in buf)
414 * @param offset Start position, as an offset from the start of this region's source.
415 * @param cnt Number of samples to read.
416 * @param chan_n Channel.
417 * @param frames_per_pixel Number of samples to use to generate one peak value.
421 AudioRegion::read_peaks (PeakData *buf, framecnt_t npeaks, framecnt_t offset, framecnt_t cnt, uint32_t chan_n, double frames_per_pixel) const
423 if (chan_n >= _sources.size()) {
427 if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, frames_per_pixel)) {
431 if (_scale_amplitude != 1.0f) {
432 for (framecnt_t n = 0; n < npeaks; ++n) {
433 buf[n].max *= _scale_amplitude;
434 buf[n].min *= _scale_amplitude;
441 /** @param buf Buffer to write data to (existing data will be overwritten).
442 * @param pos Position to read from as an offset from the region position.
443 * @param cnt Number of frames to read.
444 * @param channel Channel to read from.
447 AudioRegion::read (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
449 /* raw read, no fades, no gain, nada */
450 return read_from_sources (_sources, _length, buf, _position + pos, cnt, channel);
454 AudioRegion::master_read_at (Sample *buf, Sample* /*mixdown_buffer*/, float* /*gain_buffer*/,
455 framepos_t position, framecnt_t cnt, uint32_t chan_n) const
457 /* do not read gain/scaling/fades and do not count this disk i/o in statistics */
460 return read_from_sources (
461 _master_sources, _master_sources.front()->length (_master_sources.front()->timeline_position()),
462 buf, position, cnt, chan_n
466 /** @param buf Buffer to mix data into.
467 * @param mixdown_buffer Scratch buffer for audio data.
468 * @param gain_buffer Scratch buffer for gain data.
469 * @param position Position within the session to read from.
470 * @param cnt Number of frames to read.
471 * @param chan_n Channel number to read.
474 AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
477 uint32_t chan_n) const
479 /* We are reading data from this region into buf (possibly via mixdown_buffer).
480 The caller has verified that we cover the desired section.
483 /* See doc/region_read.svg for a drawing which might help to explain
489 if (n_channels() == 0) {
493 /* WORK OUT WHERE TO GET DATA FROM */
497 assert (position >= _position);
498 frameoffset_t const internal_offset = position - _position;
500 if (internal_offset >= _length) {
501 return 0; /* read nothing */
504 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
505 return 0; /* read nothing */
509 /* COMPUTE DETAILS OF ANY FADES INVOLVED IN THIS READ */
511 /* Amount (length) of fade in that we are dealing with in this read */
512 framecnt_t fade_in_limit = 0;
514 /* Offset from buf / mixdown_buffer of the start
515 of any fade out that we are dealing with
517 frameoffset_t fade_out_offset = 0;
519 /* Amount (length) of fade out that we are dealing with in this read */
520 framecnt_t fade_out_limit = 0;
522 framecnt_t fade_interval_start = 0;
526 if (_fade_in_active && _session.config.get_use_region_fades()) {
528 framecnt_t fade_in_length = (framecnt_t) _fade_in->back()->when;
530 /* see if this read is within the fade in */
532 if (internal_offset < fade_in_length) {
533 fade_in_limit = min (to_read, fade_in_length - internal_offset);
539 if (_fade_out_active && _session.config.get_use_region_fades()) {
541 /* see if some part of this read is within the fade out */
543 /* ................. >| REGION
549 * _length - fade_out_length
553 * ^internal_offset + to_read
555 * we need the intersection of [internal_offset,internal_offset+to_read] with
556 * [_length - fade_out_length, _length]
560 fade_interval_start = max (internal_offset, _length - framecnt_t (_fade_out->back()->when));
561 framecnt_t fade_interval_end = min(internal_offset + to_read, _length.val());
563 if (fade_interval_end > fade_interval_start) {
564 /* (part of the) the fade out is in this buffer */
565 fade_out_limit = fade_interval_end - fade_interval_start;
566 fade_out_offset = fade_interval_start - internal_offset;
570 /* READ DATA FROM THE SOURCE INTO mixdown_buffer.
571 We can never read directly into buf, since it may contain data
572 from a region `below' this one in the stack, and our fades (if they exist)
573 may need to mix with the existing data.
576 if (read_from_sources (_sources, _length, mixdown_buffer, position, to_read, chan_n) != to_read) {
580 /* APPLY REGULAR GAIN CURVES AND SCALING TO mixdown_buffer */
582 if (envelope_active()) {
583 _envelope->curve().get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
585 if (_scale_amplitude != 1.0f) {
586 for (framecnt_t n = 0; n < to_read; ++n) {
587 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
590 for (framecnt_t n = 0; n < to_read; ++n) {
591 mixdown_buffer[n] *= gain_buffer[n];
594 } else if (_scale_amplitude != 1.0f) {
595 apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
598 /* APPLY FADES TO THE DATA IN mixdown_buffer AND MIX THE RESULTS INTO
599 * buf. The key things to realize here: (1) the fade being applied is
600 * (as of April 26th 2012) just the inverse of the fade in curve (2)
601 * "buf" contains data from lower regions already. So this operation
602 * fades out the existing material.
605 if (fade_in_limit != 0) {
608 if (_inverse_fade_in) {
610 /* explicit inverse fade in curve (e.g. for constant
611 * power), so we have to fetch it.
614 _inverse_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
616 /* Fade the data from lower layers out */
617 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
618 buf[n] *= gain_buffer[n];
621 /* refill gain buffer with the fade in */
623 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
627 /* no explicit inverse fade in, so just use (1 - fade
628 * in) for the fade out of lower layers
631 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
633 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
634 buf[n] *= 1 - gain_buffer[n];
638 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
641 /* Mix our newly-read data in, with the fade */
642 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
643 buf[n] += mixdown_buffer[n] * gain_buffer[n];
647 if (fade_out_limit != 0) {
649 framecnt_t const curve_offset = fade_interval_start - (_length - _fade_out->back()->when);
652 if (_inverse_fade_out) {
654 _inverse_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
656 /* Fade the data from lower levels in */
657 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
658 buf[m] *= gain_buffer[n];
661 /* fetch the actual fade out */
663 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
667 /* no explicit inverse fade out (which is
668 * actually a fade in), so just use (1 - fade
669 * out) for the fade in of lower layers
672 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
674 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
675 buf[m] *= 1 - gain_buffer[n];
679 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
682 /* Mix our newly-read data with whatever was already there,
683 with the fade out applied to our data.
685 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
686 buf[m] += mixdown_buffer[m] * gain_buffer[n];
690 /* MIX OR COPY THE REGION BODY FROM mixdown_buffer INTO buf */
692 framecnt_t const N = to_read - fade_in_limit - fade_out_limit;
695 DEBUG_TRACE (DEBUG::AudioPlayback, string_compose ("Region %1 memcpy into buf @ %2 + %3, from mixdown buffer @ %4 + %5, len = %6 cnt was %7\n",
696 name(), buf, fade_in_limit, mixdown_buffer, fade_in_limit, N, cnt));
697 memcpy (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N * sizeof (Sample));
699 mix_buffers_no_gain (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N);
706 /** Read data directly from one of our sources, accounting for the situation when the track has a different channel
707 * count to the region.
709 * @param srcs Source list to get our source from.
710 * @param limit Furthest that we should read, as an offset from the region position.
711 * @param buf Buffer to write data into (existing contents of the buffer will be overwritten)
712 * @param position Position to read from, in session frames.
713 * @param cnt Number of frames to read.
714 * @param chan_n Channel to read from.
715 * @return Number of frames read.
719 AudioRegion::read_from_sources (SourceList const & srcs, framecnt_t limit, Sample* buf, framepos_t position, framecnt_t cnt, uint32_t chan_n) const
721 frameoffset_t const internal_offset = position - _position;
722 if (internal_offset >= limit) {
726 framecnt_t const to_read = min (cnt, limit - internal_offset);
731 if (chan_n < n_channels()) {
733 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[chan_n]);
734 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
735 return 0; /* "read nothing" */
740 /* track is N-channel, this region has fewer channels; silence the ones
744 if (Config->get_replicate_missing_region_channels()) {
746 /* copy an existing channel's data in for this non-existant one */
748 uint32_t channel = chan_n % n_channels();
749 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[channel]);
751 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
752 return 0; /* "read nothing" */
758 memset (buf, 0, sizeof (Sample) * to_read);
766 AudioRegion::get_basic_state ()
768 XMLNode& node (Region::state ());
770 LocaleGuard lg (X_("C"));
772 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
773 node.add_property ("channels", buf);
779 AudioRegion::state ()
781 XMLNode& node (get_basic_state());
783 LocaleGuard lg (X_("C"));
785 child = node.add_child ("Envelope");
787 bool default_env = false;
789 // If there are only two points, the points are in the start of the region and the end of the region
790 // so, if they are both at 1.0f, that means the default region.
792 if (_envelope->size() == 2 &&
793 _envelope->front()->value == GAIN_COEFF_UNITY &&
794 _envelope->back()->value==GAIN_COEFF_UNITY) {
795 if (_envelope->front()->when == 0 && _envelope->back()->when == _length) {
801 child->add_property ("default", "yes");
803 child->add_child_nocopy (_envelope->get_state ());
806 child = node.add_child (X_("FadeIn"));
808 if (_default_fade_in) {
809 child->add_property ("default", "yes");
811 child->add_child_nocopy (_fade_in->get_state ());
814 if (_inverse_fade_in) {
815 child = node.add_child (X_("InverseFadeIn"));
816 child->add_child_nocopy (_inverse_fade_in->get_state ());
819 child = node.add_child (X_("FadeOut"));
821 if (_default_fade_out) {
822 child->add_property ("default", "yes");
824 child->add_child_nocopy (_fade_out->get_state ());
827 if (_inverse_fade_out) {
828 child = node.add_child (X_("InverseFadeOut"));
829 child->add_child_nocopy (_inverse_fade_out->get_state ());
836 AudioRegion::_set_state (const XMLNode& node, int version, PropertyChange& what_changed, bool send)
838 const XMLNodeList& nlist = node.children();
839 const XMLProperty *prop;
840 LocaleGuard lg (X_("C"));
841 boost::shared_ptr<Playlist> the_playlist (_playlist.lock());
843 suspend_property_changes ();
846 the_playlist->freeze ();
850 /* this will set all our State members and stuff controlled by the Region.
851 It should NOT send any changed signals - that is our responsibility.
854 Region::_set_state (node, version, what_changed, false);
856 if ((prop = node.property ("scale-gain")) != 0) {
857 float a = atof (prop->value().c_str());
858 if (a != _scale_amplitude) {
859 _scale_amplitude = a;
860 what_changed.add (Properties::scale_amplitude);
864 /* Now find envelope description and other related child items */
866 _envelope->freeze ();
868 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
874 if (child->name() == "Envelope") {
878 if ((prop = child->property ("default")) != 0 || _envelope->set_state (*child, version)) {
879 set_default_envelope ();
882 _envelope->truncate_end (_length);
885 } else if (child->name() == "FadeIn") {
889 if (((prop = child->property ("default")) != 0 && string_is_affirmative (prop->value())) || (prop = child->property ("steepness")) != 0) {
890 set_default_fade_in ();
892 XMLNode* grandchild = child->child ("AutomationList");
894 _fade_in->set_state (*grandchild, version);
898 if ((prop = child->property ("active")) != 0) {
899 if (string_is_affirmative (prop->value())) {
900 set_fade_in_active (true);
902 set_fade_in_active (false);
906 } else if (child->name() == "FadeOut") {
910 if (((prop = child->property ("default")) != 0 && (string_is_affirmative (prop->value()))) || (prop = child->property ("steepness")) != 0) {
911 set_default_fade_out ();
913 XMLNode* grandchild = child->child ("AutomationList");
915 _fade_out->set_state (*grandchild, version);
919 if ((prop = child->property ("active")) != 0) {
920 if (string_is_affirmative (prop->value())) {
921 set_fade_out_active (true);
923 set_fade_out_active (false);
927 } else if ( (child->name() == "InverseFadeIn") || (child->name() == "InvFadeIn") ) {
928 XMLNode* grandchild = child->child ("AutomationList");
930 _inverse_fade_in->set_state (*grandchild, version);
932 } else if ( (child->name() == "InverseFadeOut") || (child->name() == "InvFadeOut") ) {
933 XMLNode* grandchild = child->child ("AutomationList");
935 _inverse_fade_out->set_state (*grandchild, version);
941 resume_property_changes ();
944 send_change (what_changed);
948 the_playlist->thaw ();
955 AudioRegion::set_state (const XMLNode& node, int version)
957 PropertyChange what_changed;
958 return _set_state (node, version, what_changed, true);
962 AudioRegion::fade_range (framepos_t start, framepos_t end)
966 switch (coverage (start, end)) {
967 case Evoral::OverlapStart:
971 set_fade_in (FadeConstantPower, e - s);
973 case Evoral::OverlapEnd:
976 e = _position + _length;
977 set_fade_out (FadeConstantPower, e - s);
979 case Evoral::OverlapInternal:
980 /* needs addressing, perhaps. Difficult to do if we can't
981 * control one edge of the fade relative to the relevant edge
982 * of the region, which we cannot - fades are currently assumed
983 * to start/end at the start/end of the region
992 AudioRegion::set_fade_in_shape (FadeShape shape)
994 set_fade_in (shape, (framecnt_t) _fade_in->back()->when);
998 AudioRegion::set_fade_out_shape (FadeShape shape)
1000 set_fade_out (shape, (framecnt_t) _fade_out->back()->when);
1004 AudioRegion::set_fade_in (boost::shared_ptr<AutomationList> f)
1006 _fade_in->freeze ();
1007 *(_fade_in.val()) = *f;
1009 _default_fade_in = false;
1011 send_change (PropertyChange (Properties::fade_in));
1015 AudioRegion::set_fade_in (FadeShape shape, framecnt_t len)
1017 const ARDOUR::ParameterDescriptor desc(FadeInAutomation);
1018 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeInAutomation, desc));
1019 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeInAutomation, desc));
1020 boost::shared_ptr<Evoral::ControlList> c3 (new Evoral::ControlList (FadeInAutomation, desc));
1022 _fade_in->freeze ();
1024 _inverse_fade_in->clear ();
1026 const int num_steps = 32;
1030 _fade_in->fast_simple_add (0.0, GAIN_COEFF_SMALL);
1031 _fade_in->fast_simple_add (len, GAIN_COEFF_UNITY);
1032 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
1036 generate_db_fade (_fade_in.val(), len, num_steps, -60);
1037 reverse_curve (c1, _fade_in.val());
1038 _fade_in->copy_events (*c1);
1039 generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
1043 generate_db_fade (c1, len, num_steps, -1); // start off with a slow fade
1044 generate_db_fade (c2, len, num_steps, -80); // end with a fast fade
1045 merge_curves (_fade_in.val(), c1, c2);
1046 reverse_curve (c3, _fade_in.val());
1047 _fade_in->copy_events (*c3);
1048 generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
1051 case FadeConstantPower:
1052 _fade_in->fast_simple_add (0.0, GAIN_COEFF_SMALL);
1053 for (int i = 1; i < num_steps; ++i) {
1054 const float dist = i / (num_steps + 1.f);
1055 _fade_in->fast_simple_add (len * dist, sin (dist * M_PI / 2.0));
1057 _fade_in->fast_simple_add (len, GAIN_COEFF_UNITY);
1058 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
1062 //start with a nearly linear cuve
1063 _fade_in->fast_simple_add (0, 1);
1064 _fade_in->fast_simple_add (0.5 * len, 0.6);
1065 //now generate a fade-out curve by successively applying a gain drop
1066 const double breakpoint = 0.7; //linear for first 70%
1067 for (int i = 2; i < 9; ++i) {
1068 const float coeff = (1.f - breakpoint) * powf (0.5, i);
1069 _fade_in->fast_simple_add (len * (breakpoint + ((GAIN_COEFF_UNITY - breakpoint) * (double)i / 9.0)), coeff);
1071 _fade_in->fast_simple_add (len, GAIN_COEFF_SMALL);
1072 reverse_curve (c3, _fade_in.val());
1073 _fade_in->copy_events (*c3);
1074 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
1078 _fade_in->set_interpolation(Evoral::ControlList::Curved);
1079 _inverse_fade_in->set_interpolation(Evoral::ControlList::Curved);
1081 _default_fade_in = false;
1083 send_change (PropertyChange (Properties::fade_in));
1087 AudioRegion::set_fade_out (boost::shared_ptr<AutomationList> f)
1089 _fade_out->freeze ();
1090 *(_fade_out.val()) = *f;
1092 _default_fade_out = false;
1094 send_change (PropertyChange (Properties::fade_in));
1098 AudioRegion::set_fade_out (FadeShape shape, framecnt_t len)
1100 const ARDOUR::ParameterDescriptor desc(FadeOutAutomation);
1101 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeOutAutomation, desc));
1102 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeOutAutomation, desc));
1104 _fade_out->freeze ();
1105 _fade_out->clear ();
1106 _inverse_fade_out->clear ();
1108 const int num_steps = 32;
1112 _fade_out->fast_simple_add (0.0, GAIN_COEFF_UNITY);
1113 _fade_out->fast_simple_add (len, GAIN_COEFF_SMALL);
1114 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1118 generate_db_fade (_fade_out.val(), len, num_steps, -60);
1119 generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
1123 generate_db_fade (c1, len, num_steps, -1); //start off with a slow fade
1124 generate_db_fade (c2, len, num_steps, -80); //end with a fast fade
1125 merge_curves (_fade_out.val(), c1, c2);
1126 generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
1129 case FadeConstantPower:
1130 //constant-power fades use a sin/cos relationship
1131 //the cutoff is abrupt but it has the benefit of being symmetrical
1132 _fade_out->fast_simple_add (0.0, GAIN_COEFF_UNITY);
1133 for (int i = 1; i < num_steps; ++i) {
1134 const float dist = i / (num_steps + 1.f);
1135 _fade_out->fast_simple_add (len * dist, cos (dist * M_PI / 2.0));
1137 _fade_out->fast_simple_add (len, GAIN_COEFF_SMALL);
1138 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1142 //start with a nearly linear cuve
1143 _fade_out->fast_simple_add (0, 1);
1144 _fade_out->fast_simple_add (0.5 * len, 0.6);
1145 //now generate a fade-out curve by successively applying a gain drop
1146 const double breakpoint = 0.7; //linear for first 70%
1147 for (int i = 2; i < 9; ++i) {
1148 const float coeff = (1.f - breakpoint) * powf (0.5, i);
1149 _fade_out->fast_simple_add (len * (breakpoint + ((GAIN_COEFF_UNITY - breakpoint) * (double)i / 9.0)), coeff);
1151 _fade_out->fast_simple_add (len, GAIN_COEFF_SMALL);
1152 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1156 _fade_out->set_interpolation(Evoral::ControlList::Curved);
1157 _inverse_fade_out->set_interpolation(Evoral::ControlList::Curved);
1159 _default_fade_out = false;
1161 send_change (PropertyChange (Properties::fade_out));
1165 AudioRegion::set_fade_in_length (framecnt_t len)
1167 if (len > _length) {
1175 bool changed = _fade_in->extend_to (len);
1178 if (_inverse_fade_in) {
1179 _inverse_fade_in->extend_to (len);
1182 _default_fade_in = false;
1183 send_change (PropertyChange (Properties::fade_in));
1188 AudioRegion::set_fade_out_length (framecnt_t len)
1190 if (len > _length) {
1198 bool changed = _fade_out->extend_to (len);
1202 if (_inverse_fade_out) {
1203 _inverse_fade_out->extend_to (len);
1205 _default_fade_out = false;
1207 send_change (PropertyChange (Properties::fade_out));
1212 AudioRegion::set_fade_in_active (bool yn)
1214 if (yn == _fade_in_active) {
1218 _fade_in_active = yn;
1219 send_change (PropertyChange (Properties::fade_in_active));
1223 AudioRegion::set_fade_out_active (bool yn)
1225 if (yn == _fade_out_active) {
1228 _fade_out_active = yn;
1229 send_change (PropertyChange (Properties::fade_out_active));
1233 AudioRegion::fade_in_is_default () const
1235 return _fade_in->size() == 2 && _fade_in->front()->when == 0 && _fade_in->back()->when == 64;
1239 AudioRegion::fade_out_is_default () const
1241 return _fade_out->size() == 2 && _fade_out->front()->when == 0 && _fade_out->back()->when == 64;
1245 AudioRegion::set_default_fade_in ()
1247 _fade_in_suspended = 0;
1248 set_fade_in (Config->get_default_fade_shape(), 64);
1252 AudioRegion::set_default_fade_out ()
1254 _fade_out_suspended = 0;
1255 set_fade_out (Config->get_default_fade_shape(), 64);
1259 AudioRegion::set_default_fades ()
1261 set_default_fade_in ();
1262 set_default_fade_out ();
1266 AudioRegion::set_default_envelope ()
1268 _envelope->freeze ();
1269 _envelope->clear ();
1270 _envelope->fast_simple_add (0, GAIN_COEFF_UNITY);
1271 _envelope->fast_simple_add (_length, GAIN_COEFF_UNITY);
1276 AudioRegion::recompute_at_end ()
1278 /* our length has changed. recompute a new final point by interpolating
1279 based on the the existing curve.
1282 _envelope->freeze ();
1283 _envelope->truncate_end (_length);
1286 suspend_property_changes();
1288 if (_left_of_split) {
1289 set_default_fade_out ();
1290 _left_of_split = false;
1291 } else if (_fade_out->back()->when > _length) {
1292 _fade_out->extend_to (_length);
1293 send_change (PropertyChange (Properties::fade_out));
1296 if (_fade_in->back()->when > _length) {
1297 _fade_in->extend_to (_length);
1298 send_change (PropertyChange (Properties::fade_in));
1301 resume_property_changes();
1305 AudioRegion::recompute_at_start ()
1307 /* as above, but the shift was from the front */
1309 _envelope->truncate_start (_length);
1311 suspend_property_changes();
1313 if (_right_of_split) {
1314 set_default_fade_in ();
1315 _right_of_split = false;
1316 } else if (_fade_in->back()->when > _length) {
1317 _fade_in->extend_to (_length);
1318 send_change (PropertyChange (Properties::fade_in));
1321 if (_fade_out->back()->when > _length) {
1322 _fade_out->extend_to (_length);
1323 send_change (PropertyChange (Properties::fade_out));
1326 resume_property_changes();
1330 AudioRegion::separate_by_channel (Session& /*session*/, vector<boost::shared_ptr<Region> >& v) const
1336 if (_sources.size() < 2) {
1340 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
1342 srcs.push_back (*i);
1346 if (_sources.size() == 2) {
1354 new_name += ('0' + n + 1);
1357 /* create a copy with just one source. prevent if from being thought of as
1358 "whole file" even if it covers the entire source file(s).
1363 plist.add (Properties::start, _start.val());
1364 plist.add (Properties::length, _length.val());
1365 plist.add (Properties::name, new_name);
1366 plist.add (Properties::layer, layer ());
1368 v.push_back(RegionFactory::create (srcs, plist));
1369 v.back()->set_whole_file (false);
1378 AudioRegion::read_raw_internal (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
1380 return audio_source(channel)->read (buf, pos, cnt);
1384 AudioRegion::set_scale_amplitude (gain_t g)
1386 boost::shared_ptr<Playlist> pl (playlist());
1388 _scale_amplitude = g;
1390 /* tell the diskstream we're in */
1393 pl->ContentsChanged();
1396 /* tell everybody else */
1398 send_change (PropertyChange (Properties::scale_amplitude));
1401 /** @return the maximum (linear) amplitude of the region, or a -ve
1402 * number if the Progress object reports that the process was cancelled.
1405 AudioRegion::maximum_amplitude (Progress* p) const
1407 framepos_t fpos = _start;
1408 framepos_t const fend = _start + _length;
1411 framecnt_t const blocksize = 64 * 1024;
1412 Sample buf[blocksize];
1414 while (fpos < fend) {
1418 framecnt_t const to_read = min (fend - fpos, blocksize);
1420 for (n = 0; n < n_channels(); ++n) {
1424 if (read_raw_internal (buf, fpos, to_read, n) != to_read) {
1428 maxamp = compute_peak (buf, to_read, maxamp);
1433 p->set_progress (float (fpos - _start) / _length);
1434 if (p->cancelled ()) {
1443 /** Normalize using a given maximum amplitude and target, so that region
1444 * _scale_amplitude becomes target / max_amplitude.
1447 AudioRegion::normalize (float max_amplitude, float target_dB)
1449 gain_t target = dB_to_coefficient (target_dB);
1451 if (target == GAIN_COEFF_UNITY) {
1452 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1453 that we may have clipped.
1455 target -= FLT_EPSILON;
1458 if (max_amplitude < GAIN_COEFF_SMALL) {
1459 /* don't even try */
1463 if (max_amplitude == target) {
1464 /* we can't do anything useful */
1468 set_scale_amplitude (target / max_amplitude);
1472 AudioRegion::fade_in_changed ()
1474 send_change (PropertyChange (Properties::fade_in));
1478 AudioRegion::fade_out_changed ()
1480 send_change (PropertyChange (Properties::fade_out));
1484 AudioRegion::envelope_changed ()
1486 send_change (PropertyChange (Properties::envelope));
1490 AudioRegion::suspend_fade_in ()
1492 if (++_fade_in_suspended == 1) {
1493 if (fade_in_is_default()) {
1494 set_fade_in_active (false);
1500 AudioRegion::resume_fade_in ()
1502 if (--_fade_in_suspended == 0 && _fade_in_suspended) {
1503 set_fade_in_active (true);
1508 AudioRegion::suspend_fade_out ()
1510 if (++_fade_out_suspended == 1) {
1511 if (fade_out_is_default()) {
1512 set_fade_out_active (false);
1518 AudioRegion::resume_fade_out ()
1520 if (--_fade_out_suspended == 0 &&_fade_out_suspended) {
1521 set_fade_out_active (true);
1526 AudioRegion::speed_mismatch (float sr) const
1528 if (_sources.empty()) {
1529 /* impossible, but ... */
1533 float fsr = audio_source()->sample_rate();
1539 AudioRegion::source_offset_changed ()
1541 /* XXX this fixes a crash that should not occur. It does occur
1542 becauses regions are not being deleted when a session
1543 is unloaded. That bug must be fixed.
1546 if (_sources.empty()) {
1550 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(_sources.front());
1552 if (afs && afs->destructive()) {
1553 // set_start (source()->natural_position(), this);
1554 set_position (source()->natural_position());
1558 boost::shared_ptr<AudioSource>
1559 AudioRegion::audio_source (uint32_t n) const
1561 // Guaranteed to succeed (use a static cast for speed?)
1562 return boost::dynamic_pointer_cast<AudioSource>(source(n));
1566 AudioRegion::adjust_transients (frameoffset_t delta)
1568 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1569 (*x) = (*x) + delta;
1572 send_change (PropertyChange (Properties::valid_transients));
1578 AudioRegion::update_transient (framepos_t old_position, framepos_t new_position)
1580 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1581 if ((*x) == old_position) {
1582 (*x) = new_position;
1583 send_change (PropertyChange (Properties::valid_transients));
1593 AudioRegion::add_transient (framepos_t where)
1595 _transients.push_back(where);
1596 _valid_transients = true;
1598 send_change (PropertyChange (Properties::valid_transients));
1602 AudioRegion::remove_transient (framepos_t where)
1604 _transients.remove(where);
1605 _valid_transients = true;
1607 send_change (PropertyChange (Properties::valid_transients));
1611 AudioRegion::set_transients (AnalysisFeatureList& results)
1613 _transients.clear();
1614 _transients = results;
1615 _valid_transients = true;
1617 send_change (PropertyChange (Properties::valid_transients));
1623 AudioRegion::get_transients (AnalysisFeatureList& results, bool force_new)
1625 boost::shared_ptr<Playlist> pl = playlist();
1631 if (_valid_transients && !force_new) {
1632 results = _transients;
1636 SourceList::iterator s;
1638 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1639 if (!(*s)->has_been_analysed()) {
1640 cerr << "For " << name() << " source " << (*s)->name() << " has not been analyzed\n";
1645 if (s == _sources.end()) {
1646 /* all sources are analyzed, merge data from each one */
1648 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1650 /* find the set of transients within the bounds of this region */
1652 AnalysisFeatureList::iterator low = lower_bound ((*s)->transients.begin(),
1653 (*s)->transients.end(),
1656 AnalysisFeatureList::iterator high = upper_bound ((*s)->transients.begin(),
1657 (*s)->transients.end(),
1662 results.insert (results.end(), low, high);
1665 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1667 /* translate all transients to current position */
1669 for (AnalysisFeatureList::iterator x = results.begin(); x != results.end(); ++x) {
1674 _transients = results;
1675 _valid_transients = true;
1680 /* no existing/complete transient info */
1682 static bool analyse_dialog_shown = false; /* global per instance of Ardour */
1684 if (!Config->get_auto_analyse_audio()) {
1685 if (!analyse_dialog_shown) {
1686 pl->session().Dialog (string_compose (_("\
1687 You have requested an operation that requires audio analysis.\n\n\
1688 You currently have \"auto-analyse-audio\" disabled, which means \
1689 that transient data must be generated every time it is required.\n\n\
1690 If you are doing work that will require transient data on a \
1691 regular basis, you should probably enable \"auto-analyse-audio\" \
1692 then quit %1 and restart.\n\n\
1693 This dialog will not display again. But you may notice a slight delay \
1694 in this and future transient-detection operations.\n\
1696 analyse_dialog_shown = true;
1700 bool existing_results = !results.empty();
1704 TransientDetector t (pl->session().frame_rate());
1706 _transients.clear ();
1707 _valid_transients = false;
1709 for (uint32_t i = 0; i < n_channels(); ++i) {
1711 AnalysisFeatureList these_results;
1715 if (t.run ("", this, i, these_results)) {
1719 /* translate all transients to give absolute position */
1721 for (AnalysisFeatureList::iterator i = these_results.begin(); i != these_results.end(); ++i) {
1727 _transients.insert (_transients.end(), these_results.begin(), these_results.end());
1730 error << string_compose(_("Transient Analysis failed for %1."), _("Audio Region")) << endmsg;
1734 if (!results.empty()) {
1735 if (existing_results) {
1737 /* merge our transients into the existing ones, then clean up
1741 results.insert (results.end(), _transients.begin(), _transients.end());
1742 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1745 /* make sure ours are clean too */
1747 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1751 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1752 results = _transients;
1755 _valid_transients = true;
1760 /** Find areas of `silence' within a region.
1762 * @param threshold Threshold below which signal is considered silence (as a sample value)
1763 * @param min_length Minimum length of silent period to be reported.
1764 * @return Silent intervals, measured relative to the region start in the source
1768 AudioRegion::find_silence (Sample threshold, framecnt_t min_length, InterThreadInfo& itt) const
1770 framecnt_t const block_size = 64 * 1024;
1771 boost::scoped_array<Sample> loudest (new Sample[block_size]);
1772 boost::scoped_array<Sample> buf (new Sample[block_size]);
1774 framepos_t pos = _start;
1775 framepos_t const end = _start + _length - 1;
1777 AudioIntervalResult silent_periods;
1779 bool in_silence = false;
1780 frameoffset_t silence_start = 0;
1782 while (pos < end && !itt.cancel) {
1784 /* fill `loudest' with the loudest absolute sample at each instant, across all channels */
1785 memset (loudest.get(), 0, sizeof (Sample) * block_size);
1786 for (uint32_t n = 0; n < n_channels(); ++n) {
1788 read_raw_internal (buf.get(), pos, block_size, n);
1789 for (framecnt_t i = 0; i < block_size; ++i) {
1790 loudest[i] = max (loudest[i], abs (buf[i]));
1794 /* now look for silence */
1795 for (framecnt_t i = 0; i < block_size; ++i) {
1796 bool const silence = abs (loudest[i]) < threshold;
1797 if (silence && !in_silence) {
1798 /* non-silence to silence */
1800 silence_start = pos + i;
1801 } else if (!silence && in_silence) {
1802 /* silence to non-silence */
1804 if (pos + i - 1 - silence_start >= min_length) {
1805 silent_periods.push_back (std::make_pair (silence_start, pos + i - 1));
1811 itt.progress = (end-pos)/(double)_length;
1814 if (in_silence && end - 1 - silence_start >= min_length) {
1815 /* last block was silent, so finish off the last period */
1816 silent_periods.push_back (std::make_pair (silence_start, end));
1821 return silent_periods;
1824 Evoral::Range<framepos_t>
1825 AudioRegion::body_range () const
1827 return Evoral::Range<framepos_t> (first_frame() + _fade_in->back()->when + 1, last_frame() - _fade_out->back()->when);
1830 boost::shared_ptr<Region>
1831 AudioRegion::get_single_other_xfade_region (bool start) const
1833 boost::shared_ptr<Playlist> pl (playlist());
1836 /* not currently in a playlist - xfade length is unbounded
1839 return boost::shared_ptr<AudioRegion> ();
1842 boost::shared_ptr<RegionList> rl;
1845 rl = pl->regions_at (position());
1847 rl = pl->regions_at (last_frame());
1850 RegionList::iterator i;
1851 boost::shared_ptr<Region> other;
1854 /* count and find the other region in a single pass through the list */
1856 for (i = rl->begin(); i != rl->end(); ++i) {
1857 if ((*i).get() != this) {
1864 /* zero or multiple regions stacked here - don't care about xfades */
1865 return boost::shared_ptr<AudioRegion> ();
1872 AudioRegion::verify_xfade_bounds (framecnt_t len, bool start)
1874 /* this is called from a UI to check on whether a new proposed
1875 length for an xfade is legal or not. it returns the legal
1876 length corresponding to @a len which may be shorter than or
1877 equal to @a len itself.
1880 boost::shared_ptr<Region> other = get_single_other_xfade_region (start);
1884 /* zero or > 2 regions here, don't care about len, but
1885 it can't be longer than the region itself.
1887 return min (length(), len);
1890 /* we overlap a single region. clamp the length of an xfade to
1891 the maximum possible duration of the overlap (if the other
1892 region were trimmed appropriately).
1896 maxlen = other->latest_possible_frame() - position();
1898 maxlen = last_frame() - other->earliest_possible_position();
1901 return min (length(), min (maxlen, len));