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/playlist.h"
44 #include "ardour/audiofilesource.h"
45 #include "ardour/region_factory.h"
46 #include "ardour/runtime_functions.h"
47 #include "ardour/transient_detector.h"
48 #include "ardour/progress.h"
54 using namespace ARDOUR;
58 namespace Properties {
59 PBD::PropertyDescriptor<bool> envelope_active;
60 PBD::PropertyDescriptor<bool> default_fade_in;
61 PBD::PropertyDescriptor<bool> default_fade_out;
62 PBD::PropertyDescriptor<bool> fade_in_active;
63 PBD::PropertyDescriptor<bool> fade_out_active;
64 PBD::PropertyDescriptor<float> scale_amplitude;
65 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_in;
66 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_in;
67 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_out;
68 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_out;
69 PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > envelope;
73 static const double VERY_SMALL_SIGNAL = 0.0000001; //-140dB
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++) {
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, VERY_SMALL_SIGNAL);
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));
413 AudioRegion::read_peaks (PeakData *buf, framecnt_t npeaks, framecnt_t offset, framecnt_t cnt, uint32_t chan_n, double samples_per_unit) const
415 if (chan_n >= _sources.size()) {
419 if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, samples_per_unit)) {
422 if (_scale_amplitude != 1.0f) {
423 for (framecnt_t n = 0; n < npeaks; ++n) {
424 buf[n].max *= _scale_amplitude;
425 buf[n].min *= _scale_amplitude;
432 /** @param buf Buffer to write data to (existing data will be overwritten).
433 * @param pos Position to read from as an offset from the region position.
434 * @param cnt Number of frames to read.
435 * @param channel Channel to read from.
438 AudioRegion::read (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
440 /* raw read, no fades, no gain, nada */
441 return read_from_sources (_sources, _length, buf, _position + pos, cnt, channel);
445 AudioRegion::master_read_at (Sample *buf, Sample* /*mixdown_buffer*/, float* /*gain_buffer*/,
446 framepos_t position, framecnt_t cnt, uint32_t chan_n) const
448 /* do not read gain/scaling/fades and do not count this disk i/o in statistics */
451 return read_from_sources (
452 _master_sources, _master_sources.front()->length (_master_sources.front()->timeline_position()),
453 buf, position, cnt, chan_n
457 /** @param buf Buffer to mix data into.
458 * @param mixdown_buffer Scratch buffer for audio data.
459 * @param gain_buffer Scratch buffer for gain data.
460 * @param position Position within the session to read from.
461 * @param cnt Number of frames to read.
462 * @param chan_n Channel number to read.
465 AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
468 uint32_t chan_n) const
470 /* We are reading data from this region into buf (possibly via mixdown_buffer).
471 The caller has verified that we cover the desired section.
474 /* See doc/region_read.svg for a drawing which might help to explain
480 if (n_channels() == 0) {
484 /* WORK OUT WHERE TO GET DATA FROM */
488 assert (position >= _position);
489 frameoffset_t const internal_offset = position - _position;
491 if (internal_offset >= _length) {
492 return 0; /* read nothing */
495 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
496 return 0; /* read nothing */
500 /* COMPUTE DETAILS OF ANY FADES INVOLVED IN THIS READ */
502 /* Amount (length) of fade in that we are dealing with in this read */
503 framecnt_t fade_in_limit = 0;
505 /* Offset from buf / mixdown_buffer of the start
506 of any fade out that we are dealing with
508 frameoffset_t fade_out_offset = 0;
510 /* Amount (length) of fade out that we are dealing with in this read */
511 framecnt_t fade_out_limit = 0;
513 framecnt_t fade_interval_start = 0;
517 if (_fade_in_active && _session.config.get_use_region_fades()) {
519 framecnt_t fade_in_length = (framecnt_t) _fade_in->back()->when;
521 /* see if this read is within the fade in */
523 if (internal_offset < fade_in_length) {
524 fade_in_limit = min (to_read, fade_in_length - internal_offset);
530 if (_fade_out_active && _session.config.get_use_region_fades()) {
532 /* see if some part of this read is within the fade out */
534 /* ................. >| REGION
540 _length - fade_out_length
543 ^internal_offset + to_read
545 we need the intersection of [internal_offset,internal_offset+to_read] with
546 [_length - fade_out_length, _length]
551 fade_interval_start = max (internal_offset, _length - framecnt_t (_fade_out->back()->when));
552 framecnt_t fade_interval_end = min(internal_offset + to_read, _length.val());
554 if (fade_interval_end > fade_interval_start) {
555 /* (part of the) the fade out is in this buffer */
556 fade_out_limit = fade_interval_end - fade_interval_start;
557 fade_out_offset = fade_interval_start - internal_offset;
561 /* READ DATA FROM THE SOURCE INTO mixdown_buffer.
562 We can never read directly into buf, since it may contain data
563 from a region `below' this one in the stack, and our fades (if they exist)
564 may need to mix with the existing data.
567 if (read_from_sources (_sources, _length, mixdown_buffer, position, to_read, chan_n) != to_read) {
571 /* APPLY REGULAR GAIN CURVES AND SCALING TO mixdown_buffer */
573 if (envelope_active()) {
574 _envelope->curve().get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
576 if (_scale_amplitude != 1.0f) {
577 for (framecnt_t n = 0; n < to_read; ++n) {
578 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
581 for (framecnt_t n = 0; n < to_read; ++n) {
582 mixdown_buffer[n] *= gain_buffer[n];
585 } else if (_scale_amplitude != 1.0f) {
586 apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
589 /* APPLY FADES TO THE DATA IN mixdown_buffer AND MIX THE RESULTS INTO
590 * buf. The key things to realize here: (1) the fade being applied is
591 * (as of April 26th 2012) just the inverse of the fade in curve (2)
592 * "buf" contains data from lower regions already. So this operation
593 * fades out the existing material.
596 if (fade_in_limit != 0) {
599 if (_inverse_fade_in) {
601 /* explicit inverse fade in curve (e.g. for constant
602 * power), so we have to fetch it.
605 _inverse_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
607 /* Fade the data from lower layers out */
608 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
609 buf[n] *= gain_buffer[n];
612 /* refill gain buffer with the fade in */
614 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
618 /* no explicit inverse fade in, so just use (1 - fade
619 * in) for the fade out of lower layers
622 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
624 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
625 buf[n] *= 1 - gain_buffer[n];
629 _fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
632 /* Mix our newly-read data in, with the fade */
633 for (framecnt_t n = 0; n < fade_in_limit; ++n) {
634 buf[n] += mixdown_buffer[n] * gain_buffer[n];
638 if (fade_out_limit != 0) {
640 framecnt_t const curve_offset = fade_interval_start - (_length - _fade_out->back()->when);
643 if (_inverse_fade_out) {
645 _inverse_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
647 /* Fade the data from lower levels in */
648 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
649 buf[m] *= gain_buffer[n];
652 /* fetch the actual fade out */
654 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
658 /* no explicit inverse fade out (which is
659 * actually a fade in), so just use (1 - fade
660 * out) for the fade in of lower layers
663 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
665 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
666 buf[m] *= 1 - gain_buffer[n];
670 _fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
673 /* Mix our newly-read data with whatever was already there,
674 with the fade out applied to our data.
676 for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
677 buf[m] += mixdown_buffer[m] * gain_buffer[n];
681 /* MIX OR COPY THE REGION BODY FROM mixdown_buffer INTO buf */
683 framecnt_t const N = to_read - fade_in_limit - fade_out_limit;
686 DEBUG_TRACE (DEBUG::AudioPlayback, string_compose ("Region %1 memcpy into buf @ %2 + %3, from mixdown buffer @ %4 + %5, len = %6 cnt was %7\n",
687 name(), buf, fade_in_limit, mixdown_buffer, fade_in_limit, N, cnt));
688 memcpy (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N * sizeof (Sample));
690 mix_buffers_no_gain (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N);
697 /** Read data directly from one of our sources, accounting for the situation when the track has a different channel
698 * count to the region.
700 * @param srcs Source list to get our source from.
701 * @param limit Furthest that we should read, as an offset from the region position.
702 * @param buf Buffer to write data into (existing contents of the buffer will be overwritten)
703 * @param position Position to read from, in session frames.
704 * @param cnt Number of frames to read.
705 * @param chan_n Channel to read from.
706 * @return Number of frames read.
710 AudioRegion::read_from_sources (SourceList const & srcs, framecnt_t limit, Sample* buf, framepos_t position, framecnt_t cnt, uint32_t chan_n) const
712 frameoffset_t const internal_offset = position - _position;
713 if (internal_offset >= limit) {
717 framecnt_t const to_read = min (cnt, limit - internal_offset);
722 if (chan_n < n_channels()) {
724 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[chan_n]);
725 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
726 return 0; /* "read nothing" */
731 /* track is N-channel, this region has fewer channels; silence the ones
735 if (Config->get_replicate_missing_region_channels()) {
737 /* copy an existing channel's data in for this non-existant one */
739 uint32_t channel = n_channels() % chan_n;
740 boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[channel]);
742 if (src->read (buf, _start + internal_offset, to_read) != to_read) {
743 return 0; /* "read nothing" */
749 memset (buf, 0, sizeof (Sample) * to_read);
757 AudioRegion::state ()
759 XMLNode& node (Region::state ());
762 LocaleGuard lg (X_("POSIX"));
764 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
765 node.add_property ("channels", buf);
767 child = node.add_child ("Envelope");
769 bool default_env = false;
771 // If there are only two points, the points are in the start of the region and the end of the region
772 // so, if they are both at 1.0f, that means the default region.
774 if (_envelope->size() == 2 &&
775 _envelope->front()->value == 1.0f &&
776 _envelope->back()->value==1.0f) {
777 if (_envelope->front()->when == 0 && _envelope->back()->when == _length) {
783 child->add_property ("default", "yes");
785 child->add_child_nocopy (_envelope->get_state ());
788 child = node.add_child (X_("FadeIn"));
790 if (_default_fade_in) {
791 child->add_property ("default", "yes");
793 child->add_child_nocopy (_fade_in->get_state ());
796 if (_inverse_fade_in) {
797 child = node.add_child (X_("InverseFadeIn"));
798 child->add_child_nocopy (_inverse_fade_in->get_state ());
801 child = node.add_child (X_("FadeOut"));
803 if (_default_fade_out) {
804 child->add_property ("default", "yes");
806 child->add_child_nocopy (_fade_out->get_state ());
809 if (_inverse_fade_out) {
810 child = node.add_child (X_("InverseFadeOut"));
811 child->add_child_nocopy (_inverse_fade_out->get_state ());
818 AudioRegion::_set_state (const XMLNode& node, int version, PropertyChange& what_changed, bool send)
820 const XMLNodeList& nlist = node.children();
821 const XMLProperty *prop;
822 LocaleGuard lg (X_("POSIX"));
823 boost::shared_ptr<Playlist> the_playlist (_playlist.lock());
825 suspend_property_changes ();
828 the_playlist->freeze ();
832 /* this will set all our State members and stuff controlled by the Region.
833 It should NOT send any changed signals - that is our responsibility.
836 Region::_set_state (node, version, what_changed, false);
838 if ((prop = node.property ("scale-gain")) != 0) {
839 float a = atof (prop->value().c_str());
840 if (a != _scale_amplitude) {
841 _scale_amplitude = a;
842 what_changed.add (Properties::scale_amplitude);
846 /* Now find envelope description and other related child items */
848 _envelope->freeze ();
850 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
856 if (child->name() == "Envelope") {
860 if ((prop = child->property ("default")) != 0 || _envelope->set_state (*child, version)) {
861 set_default_envelope ();
864 _envelope->truncate_end (_length);
867 } else if (child->name() == "FadeIn") {
871 if (((prop = child->property ("default")) != 0 && string_is_affirmative (prop->value())) || (prop = child->property ("steepness")) != 0) {
872 set_default_fade_in ();
874 XMLNode* grandchild = child->child ("AutomationList");
876 _fade_in->set_state (*grandchild, version);
880 if ((prop = child->property ("active")) != 0) {
881 if (string_is_affirmative (prop->value())) {
882 set_fade_in_active (true);
884 set_fade_in_active (false);
888 } else if (child->name() == "FadeOut") {
892 if (((prop = child->property ("default")) != 0 && (string_is_affirmative (prop->value()))) || (prop = child->property ("steepness")) != 0) {
893 set_default_fade_out ();
895 XMLNode* grandchild = child->child ("AutomationList");
897 _fade_out->set_state (*grandchild, version);
901 if ((prop = child->property ("active")) != 0) {
902 if (string_is_affirmative (prop->value())) {
903 set_fade_out_active (true);
905 set_fade_out_active (false);
909 } else if (child->name() == "InverseFadeIn") {
910 XMLNode* grandchild = child->child ("AutomationList");
912 _inverse_fade_in->set_state (*grandchild, version);
914 } else if (child->name() == "InverseFadeOut") {
915 XMLNode* grandchild = child->child ("AutomationList");
917 _inverse_fade_out->set_state (*grandchild, version);
923 resume_property_changes ();
926 send_change (what_changed);
930 the_playlist->thaw ();
937 AudioRegion::set_state (const XMLNode& node, int version)
939 PropertyChange what_changed;
940 return _set_state (node, version, what_changed, true);
944 AudioRegion::set_fade_in_shape (FadeShape shape)
946 set_fade_in (shape, (framecnt_t) _fade_in->back()->when);
950 AudioRegion::set_fade_out_shape (FadeShape shape)
952 set_fade_out (shape, (framecnt_t) _fade_out->back()->when);
956 AudioRegion::set_fade_in (boost::shared_ptr<AutomationList> f)
959 *(_fade_in.val()) = *f;
961 _default_fade_in = false;
963 send_change (PropertyChange (Properties::fade_in));
967 AudioRegion::set_fade_in (FadeShape shape, framecnt_t len)
969 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeInAutomation));
970 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeInAutomation));
971 boost::shared_ptr<Evoral::ControlList> c3 (new Evoral::ControlList (FadeInAutomation));
975 _inverse_fade_in->clear ();
979 _fade_in->fast_simple_add (0.0, 0.0);
980 _fade_in->fast_simple_add (len, 1.0);
981 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
985 generate_db_fade (_fade_in.val(), len, 10, -60);
986 reverse_curve (c1, _fade_in.val());
987 _fade_in->copy_events (*c1);
988 generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
992 generate_db_fade (c1, len, 10, -1); // start off with a slow fade
993 generate_db_fade (c2, len, 10, -80); // end with a fast fade
994 merge_curves (_fade_in.val(), c1, c2);
995 reverse_curve (c3, _fade_in.val());
996 _fade_in->copy_events (*c3);
997 generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
1000 case FadeConstantPower:
1001 for (int i = 0; i < 9; ++i) {
1002 float dist = (float) i / 10.0f;
1003 _fade_in->fast_simple_add (len*dist, sin (dist*M_PI/2));
1005 _fade_in->fast_simple_add (len, 1.0);
1006 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
1010 //start with a nearly linear cuve
1011 _fade_in->fast_simple_add (0, 1);
1012 _fade_in->fast_simple_add (0.5*len, 0.6);
1013 //now generate a fade-out curve by successively applying a gain drop
1014 const float breakpoint = 0.7; //linear for first 70%
1015 const int num_steps = 9;
1016 for (int i = 2; i < num_steps; i++) {
1017 float coeff = (1.0-breakpoint);
1018 for (int j = 0; j < i; j++) {
1019 coeff *= 0.5; //6dB drop per step
1021 _fade_in->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
1023 _fade_in->fast_simple_add (len, VERY_SMALL_SIGNAL);
1024 reverse_curve (c3, _fade_in.val());
1025 _fade_in->copy_events (*c3);
1026 reverse_curve (_inverse_fade_in.val(), _fade_in.val());
1030 _default_fade_in = false;
1032 send_change (PropertyChange (Properties::fade_in));
1036 AudioRegion::set_fade_out (boost::shared_ptr<AutomationList> f)
1038 _fade_out->freeze ();
1039 *(_fade_out.val()) = *f;
1041 _default_fade_out = false;
1043 send_change (PropertyChange (Properties::fade_in));
1047 AudioRegion::set_fade_out (FadeShape shape, framecnt_t len)
1049 boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeOutAutomation));
1050 boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeOutAutomation));
1052 _fade_out->freeze ();
1053 _fade_out->clear ();
1054 _inverse_fade_out->clear ();
1058 _fade_out->fast_simple_add (0.0, 1.0);
1059 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1060 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1064 generate_db_fade (_fade_out.val(), len, 10, -60);
1065 generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
1069 generate_db_fade (c1, len, 10, -1); //start off with a slow fade
1070 generate_db_fade (c2, len, 10, -80); //end with a fast fade
1071 merge_curves (_fade_out.val(), c1, c2);
1072 generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
1075 case FadeConstantPower:
1076 //constant-power fades use a sin/cos relationship
1077 //the cutoff is abrupt but it has the benefit of being symmetrical
1078 _fade_out->fast_simple_add (0.0, 1.0);
1079 for (int i = 1; i < 9; i++ ) {
1080 float dist = (float)i/10.0;
1081 _fade_out->fast_simple_add ((len * dist), cos(dist*M_PI/2));
1083 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1084 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1088 //start with a nearly linear cuve
1089 _fade_out->fast_simple_add (0, 1);
1090 _fade_out->fast_simple_add (0.5*len, 0.6);
1092 //now generate a fade-out curve by successively applying a gain drop
1093 const float breakpoint = 0.7; //linear for first 70%
1094 const int num_steps = 9;
1095 for (int i = 2; i < num_steps; i++) {
1096 float coeff = (1.0-breakpoint);
1097 for (int j = 0; j < i; j++) {
1098 coeff *= 0.5; //6dB drop per step
1100 _fade_out->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
1102 _fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
1103 reverse_curve (_inverse_fade_out.val(), _fade_out.val());
1107 _default_fade_out = false;
1109 send_change (PropertyChange (Properties::fade_out));
1113 AudioRegion::set_fade_in_length (framecnt_t len)
1115 if (len > _length) {
1123 bool changed = _fade_in->extend_to (len);
1126 if (_inverse_fade_in) {
1127 _inverse_fade_in->extend_to (len);
1130 _default_fade_in = false;
1131 send_change (PropertyChange (Properties::fade_in));
1136 AudioRegion::set_fade_out_length (framecnt_t len)
1138 if (len > _length) {
1146 bool changed = _fade_out->extend_to (len);
1150 if (_inverse_fade_out) {
1151 _inverse_fade_out->extend_to (len);
1153 _default_fade_out = false;
1155 send_change (PropertyChange (Properties::fade_out));
1160 AudioRegion::set_fade_in_active (bool yn)
1162 if (yn == _fade_in_active) {
1166 _fade_in_active = yn;
1167 send_change (PropertyChange (Properties::fade_in_active));
1171 AudioRegion::set_fade_out_active (bool yn)
1173 if (yn == _fade_out_active) {
1176 _fade_out_active = yn;
1177 send_change (PropertyChange (Properties::fade_out_active));
1181 AudioRegion::fade_in_is_default () const
1183 return _fade_in->size() == 2 && _fade_in->front()->when == 0 && _fade_in->back()->when == 64;
1187 AudioRegion::fade_out_is_default () const
1189 return _fade_out->size() == 2 && _fade_out->front()->when == 0 && _fade_out->back()->when == 64;
1193 AudioRegion::set_default_fade_in ()
1195 _fade_in_suspended = 0;
1196 set_fade_in (FadeLinear, 64);
1200 AudioRegion::set_default_fade_out ()
1202 _fade_out_suspended = 0;
1203 set_fade_out (FadeLinear, 64);
1207 AudioRegion::set_default_fades ()
1209 set_default_fade_in ();
1210 set_default_fade_out ();
1214 AudioRegion::set_default_envelope ()
1216 _envelope->freeze ();
1217 _envelope->clear ();
1218 _envelope->fast_simple_add (0, 1.0f);
1219 _envelope->fast_simple_add (_length, 1.0f);
1224 AudioRegion::recompute_at_end ()
1226 /* our length has changed. recompute a new final point by interpolating
1227 based on the the existing curve.
1230 _envelope->freeze ();
1231 _envelope->truncate_end (_length);
1234 suspend_property_changes();
1236 if (_left_of_split) {
1237 set_default_fade_out ();
1238 _left_of_split = false;
1239 } else if (_fade_out->back()->when > _length) {
1240 _fade_out->extend_to (_length);
1241 send_change (PropertyChange (Properties::fade_out));
1244 if (_fade_in->back()->when > _length) {
1245 _fade_in->extend_to (_length);
1246 send_change (PropertyChange (Properties::fade_in));
1249 resume_property_changes();
1253 AudioRegion::recompute_at_start ()
1255 /* as above, but the shift was from the front */
1257 _envelope->truncate_start (_length);
1259 suspend_property_changes();
1261 if (_right_of_split) {
1262 set_default_fade_in ();
1263 _right_of_split = false;
1264 } else if (_fade_in->back()->when > _length) {
1265 _fade_in->extend_to (_length);
1266 send_change (PropertyChange (Properties::fade_in));
1269 if (_fade_out->back()->when > _length) {
1270 _fade_out->extend_to (_length);
1271 send_change (PropertyChange (Properties::fade_out));
1274 resume_property_changes();
1278 AudioRegion::separate_by_channel (Session& /*session*/, vector<boost::shared_ptr<Region> >& v) const
1284 if (_sources.size() < 2) {
1288 for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
1290 srcs.push_back (*i);
1294 if (_sources.size() == 2) {
1302 new_name += ('0' + n + 1);
1305 /* create a copy with just one source. prevent if from being thought of as
1306 "whole file" even if it covers the entire source file(s).
1311 plist.add (Properties::start, _start.val());
1312 plist.add (Properties::length, _length.val());
1313 plist.add (Properties::name, new_name);
1314 plist.add (Properties::layer, layer ());
1316 v.push_back(RegionFactory::create (srcs, plist));
1317 v.back()->set_whole_file (false);
1326 AudioRegion::read_raw_internal (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
1328 return audio_source(channel)->read (buf, pos, cnt);
1332 AudioRegion::set_scale_amplitude (gain_t g)
1334 boost::shared_ptr<Playlist> pl (playlist());
1336 _scale_amplitude = g;
1338 /* tell the diskstream we're in */
1341 pl->ContentsChanged();
1344 /* tell everybody else */
1346 send_change (PropertyChange (Properties::scale_amplitude));
1349 /** @return the maximum (linear) amplitude of the region, or a -ve
1350 * number if the Progress object reports that the process was cancelled.
1353 AudioRegion::maximum_amplitude (Progress* p) const
1355 framepos_t fpos = _start;
1356 framepos_t const fend = _start + _length;
1359 framecnt_t const blocksize = 64 * 1024;
1360 Sample buf[blocksize];
1362 while (fpos < fend) {
1366 framecnt_t const to_read = min (fend - fpos, blocksize);
1368 for (n = 0; n < n_channels(); ++n) {
1372 if (read_raw_internal (buf, fpos, to_read, n) != to_read) {
1376 maxamp = compute_peak (buf, to_read, maxamp);
1381 p->set_progress (float (fpos - _start) / _length);
1382 if (p->cancelled ()) {
1391 /** Normalize using a given maximum amplitude and target, so that region
1392 * _scale_amplitude becomes target / max_amplitude.
1395 AudioRegion::normalize (float max_amplitude, float target_dB)
1397 gain_t target = dB_to_coefficient (target_dB);
1399 if (target == 1.0f) {
1400 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1401 that we may have clipped.
1403 target -= FLT_EPSILON;
1406 if (max_amplitude == 0.0f) {
1407 /* don't even try */
1411 if (max_amplitude == target) {
1412 /* we can't do anything useful */
1416 set_scale_amplitude (target / max_amplitude);
1420 AudioRegion::fade_in_changed ()
1422 send_change (PropertyChange (Properties::fade_in));
1426 AudioRegion::fade_out_changed ()
1428 send_change (PropertyChange (Properties::fade_out));
1432 AudioRegion::envelope_changed ()
1434 send_change (PropertyChange (Properties::envelope));
1438 AudioRegion::suspend_fade_in ()
1440 if (++_fade_in_suspended == 1) {
1441 if (fade_in_is_default()) {
1442 set_fade_in_active (false);
1448 AudioRegion::resume_fade_in ()
1450 if (--_fade_in_suspended == 0 && _fade_in_suspended) {
1451 set_fade_in_active (true);
1456 AudioRegion::suspend_fade_out ()
1458 if (++_fade_out_suspended == 1) {
1459 if (fade_out_is_default()) {
1460 set_fade_out_active (false);
1466 AudioRegion::resume_fade_out ()
1468 if (--_fade_out_suspended == 0 &&_fade_out_suspended) {
1469 set_fade_out_active (true);
1474 AudioRegion::speed_mismatch (float sr) const
1476 if (_sources.empty()) {
1477 /* impossible, but ... */
1481 float fsr = audio_source()->sample_rate();
1487 AudioRegion::source_offset_changed ()
1489 /* XXX this fixes a crash that should not occur. It does occur
1490 becauses regions are not being deleted when a session
1491 is unloaded. That bug must be fixed.
1494 if (_sources.empty()) {
1498 boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(_sources.front());
1500 if (afs && afs->destructive()) {
1501 // set_start (source()->natural_position(), this);
1502 set_position (source()->natural_position());
1506 boost::shared_ptr<AudioSource>
1507 AudioRegion::audio_source (uint32_t n) const
1509 // Guaranteed to succeed (use a static cast for speed?)
1510 return boost::dynamic_pointer_cast<AudioSource>(source(n));
1514 AudioRegion::adjust_transients (frameoffset_t delta)
1516 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1517 (*x) = (*x) + delta;
1520 send_change (PropertyChange (Properties::valid_transients));
1526 AudioRegion::update_transient (framepos_t old_position, framepos_t new_position)
1528 for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
1529 if ((*x) == old_position) {
1530 (*x) = new_position;
1531 send_change (PropertyChange (Properties::valid_transients));
1541 AudioRegion::add_transient (framepos_t where)
1543 _transients.push_back(where);
1544 _valid_transients = true;
1546 send_change (PropertyChange (Properties::valid_transients));
1550 AudioRegion::remove_transient (framepos_t where)
1552 _transients.remove(where);
1553 _valid_transients = true;
1555 send_change (PropertyChange (Properties::valid_transients));
1559 AudioRegion::set_transients (AnalysisFeatureList& results)
1561 _transients.clear();
1562 _transients = results;
1563 _valid_transients = true;
1565 send_change (PropertyChange (Properties::valid_transients));
1571 AudioRegion::get_transients (AnalysisFeatureList& results, bool force_new)
1573 boost::shared_ptr<Playlist> pl = playlist();
1579 if (_valid_transients && !force_new) {
1580 results = _transients;
1584 SourceList::iterator s;
1586 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1587 if (!(*s)->has_been_analysed()) {
1588 cerr << "For " << name() << " source " << (*s)->name() << " has not been analyzed\n";
1593 if (s == _sources.end()) {
1594 /* all sources are analyzed, merge data from each one */
1596 for (s = _sources.begin() ; s != _sources.end(); ++s) {
1598 /* find the set of transients within the bounds of this region */
1600 AnalysisFeatureList::iterator low = lower_bound ((*s)->transients.begin(),
1601 (*s)->transients.end(),
1604 AnalysisFeatureList::iterator high = upper_bound ((*s)->transients.begin(),
1605 (*s)->transients.end(),
1610 results.insert (results.end(), low, high);
1613 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1615 /* translate all transients to current position */
1617 for (AnalysisFeatureList::iterator x = results.begin(); x != results.end(); ++x) {
1622 _transients = results;
1623 _valid_transients = true;
1628 /* no existing/complete transient info */
1630 static bool analyse_dialog_shown = false; /* global per instance of Ardour */
1632 if (!Config->get_auto_analyse_audio()) {
1633 if (!analyse_dialog_shown) {
1634 pl->session().Dialog (_("\
1635 You have requested an operation that requires audio analysis.\n\n\
1636 You currently have \"auto-analyse-audio\" disabled, which means \
1637 that transient data must be generated every time it is required.\n\n\
1638 If you are doing work that will require transient data on a \
1639 regular basis, you should probably enable \"auto-analyse-audio\" \
1640 then quit ardour and restart.\n\n\
1641 This dialog will not display again. But you may notice a slight delay \
1642 in this and future transient-detection operations.\n\
1644 analyse_dialog_shown = true;
1648 TransientDetector t (pl->session().frame_rate());
1649 bool existing_results = !results.empty();
1651 _transients.clear ();
1652 _valid_transients = false;
1654 for (uint32_t i = 0; i < n_channels(); ++i) {
1656 AnalysisFeatureList these_results;
1660 if (t.run ("", this, i, these_results)) {
1664 /* translate all transients to give absolute position */
1666 for (AnalysisFeatureList::iterator i = these_results.begin(); i != these_results.end(); ++i) {
1672 _transients.insert (_transients.end(), these_results.begin(), these_results.end());
1675 if (!results.empty()) {
1676 if (existing_results) {
1678 /* merge our transients into the existing ones, then clean up
1682 results.insert (results.end(), _transients.begin(), _transients.end());
1683 TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
1686 /* make sure ours are clean too */
1688 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1692 TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
1693 results = _transients;
1696 _valid_transients = true;
1701 /** Find areas of `silence' within a region.
1703 * @param threshold Threshold below which signal is considered silence (as a sample value)
1704 * @param min_length Minimum length of silent period to be reported.
1705 * @return Silent intervals, measured relative to the region start in the source
1709 AudioRegion::find_silence (Sample threshold, framecnt_t min_length, InterThreadInfo& itt) const
1711 framecnt_t const block_size = 64 * 1024;
1712 boost::scoped_array<Sample> loudest (new Sample[block_size]);
1713 boost::scoped_array<Sample> buf (new Sample[block_size]);
1715 framepos_t pos = _start;
1716 framepos_t const end = _start + _length - 1;
1718 AudioIntervalResult silent_periods;
1720 bool in_silence = false;
1721 frameoffset_t silence_start = 0;
1723 while (pos < end && !itt.cancel) {
1725 /* fill `loudest' with the loudest absolute sample at each instant, across all channels */
1726 memset (loudest.get(), 0, sizeof (Sample) * block_size);
1727 for (uint32_t n = 0; n < n_channels(); ++n) {
1729 read_raw_internal (buf.get(), pos, block_size, n);
1730 for (framecnt_t i = 0; i < block_size; ++i) {
1731 loudest[i] = max (loudest[i], abs (buf[i]));
1735 /* now look for silence */
1736 for (framecnt_t i = 0; i < block_size; ++i) {
1737 bool const silence = abs (loudest[i]) < threshold;
1738 if (silence && !in_silence) {
1739 /* non-silence to silence */
1741 silence_start = pos + i;
1742 } else if (!silence && in_silence) {
1743 /* silence to non-silence */
1745 if (pos + i - 1 - silence_start >= min_length) {
1746 silent_periods.push_back (std::make_pair (silence_start, pos + i - 1));
1752 itt.progress = (end-pos)/(double)_length;
1755 if (in_silence && end - 1 - silence_start >= min_length) {
1756 /* last block was silent, so finish off the last period */
1757 silent_periods.push_back (std::make_pair (silence_start, end));
1762 return silent_periods;
1765 Evoral::Range<framepos_t>
1766 AudioRegion::body_range () const
1768 return Evoral::Range<framepos_t> (first_frame() + _fade_in->back()->when + 1, last_frame() - _fade_out->back()->when);
1771 boost::shared_ptr<Region>
1772 AudioRegion::get_single_other_xfade_region (bool start) const
1774 boost::shared_ptr<Playlist> pl (playlist());
1777 /* not currently in a playlist - xfade length is unbounded
1780 return boost::shared_ptr<AudioRegion> ();
1783 boost::shared_ptr<RegionList> rl;
1786 rl = pl->regions_at (position());
1788 rl = pl->regions_at (last_frame());
1791 RegionList::iterator i;
1792 boost::shared_ptr<Region> other;
1795 /* count and find the other region in a single pass through the list */
1797 for (i = rl->begin(); i != rl->end(); ++i) {
1798 if ((*i).get() != this) {
1805 /* zero or multiple regions stacked here - don't care about xfades */
1806 return boost::shared_ptr<AudioRegion> ();
1813 AudioRegion::verify_xfade_bounds (framecnt_t len, bool start)
1815 /* this is called from a UI to check on whether a new proposed
1816 length for an xfade is legal or not. it returns the legal
1817 length corresponding to @a len which may be shorter than or
1818 equal to @a len itself.
1821 boost::shared_ptr<Region> other = get_single_other_xfade_region (start);
1825 /* zero or > 2 regions here, don't care about len, but
1826 it can't be longer than the region itself.
1828 return min (length(), len);
1831 /* we overlap a single region. clamp the length of an xfade to
1832 the maximum possible duration of the overlap (if the other
1833 region were trimmed appropriately).
1837 maxlen = other->latest_possible_frame() - position();
1839 maxlen = last_frame() - other->earliest_possible_position();
1842 return min (length(), min (maxlen, len));
1848 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)
1850 return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (framecnt_t) npeaks, (framepos_t) start, (framecnt_t) cnt, n_chan,samples_per_unit);
1853 uint32_t region_length_from_c (void *arg)
1856 return ((AudioRegion *) arg)->length();
1859 uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
1861 return ( (AudioRegion *) arg)->audio_source()->available_peaks (zoom_factor) ;