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livetrax/libs/ardour/audioregion.cc
Robin Gareus 0c90adf3e6 skip fade&envelope info in region XML 
git-svn-id: svn://localhost/ardour2/branches/3.0@14118 d708f5d6-7413-0410-9779-e7cbd77b26cf
2013-03-03 08:26:50 +00:00

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/*
Copyright (C) 2000-2006 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include <climits>
#include <cfloat>
#include <algorithm>
#include <set>
#include <boost/scoped_array.hpp>
#include <glibmm/threads.h>
#include "pbd/basename.h"
#include "pbd/xml++.h"
#include "pbd/stacktrace.h"
#include "pbd/enumwriter.h"
#include "pbd/convert.h"
#include "evoral/Curve.hpp"
#include "ardour/audioregion.h"
#include "ardour/session.h"
#include "ardour/dB.h"
#include "ardour/debug.h"
#include "ardour/playlist.h"
#include "ardour/audiofilesource.h"
#include "ardour/region_factory.h"
#include "ardour/runtime_functions.h"
#include "ardour/transient_detector.h"
#include "ardour/progress.h"
#include "i18n.h"
#include <locale.h>
using namespace std;
using namespace ARDOUR;
using namespace PBD;
namespace ARDOUR {
namespace Properties {
PBD::PropertyDescriptor<bool> envelope_active;
PBD::PropertyDescriptor<bool> default_fade_in;
PBD::PropertyDescriptor<bool> default_fade_out;
PBD::PropertyDescriptor<bool> fade_in_active;
PBD::PropertyDescriptor<bool> fade_out_active;
PBD::PropertyDescriptor<float> scale_amplitude;
PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_in;
PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_in;
PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > fade_out;
PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > inverse_fade_out;
PBD::PropertyDescriptor<boost::shared_ptr<AutomationList> > envelope;
}
}
static const double VERY_SMALL_SIGNAL = 0.0000001; //-140dB
/* Curve manipulations */
static void
reverse_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
{
size_t len = src->back()->when;
for (Evoral::ControlList::const_reverse_iterator it = src->rbegin(); it!=src->rend(); it++) {
dst->fast_simple_add (len - (*it)->when, (*it)->value);
}
}
static void
generate_inverse_power_curve (boost::shared_ptr<Evoral::ControlList> dst, boost::shared_ptr<const Evoral::ControlList> src)
{
// calc inverse curve using sum of squares
for (Evoral::ControlList::const_iterator it = src->begin(); it!=src->end(); ++it ) {
float value = (*it)->value;
value = 1 - powf(value,2);
value = sqrtf(value);
dst->fast_simple_add ( (*it)->when, value );
}
}
static void
generate_db_fade (boost::shared_ptr<Evoral::ControlList> dst, double len, int num_steps, float dB_drop)
{
dst->clear ();
dst->fast_simple_add (0, 1);
//generate a fade-out curve by successively applying a gain drop
float fade_speed = dB_to_coefficient(dB_drop / (float) num_steps);
for (int i = 1; i < (num_steps-1); i++) {
float coeff = 1.0;
for (int j = 0; j < i; j++) {
coeff *= fade_speed;
}
dst->fast_simple_add (len*(double)i/(double)num_steps, coeff);
}
dst->fast_simple_add (len, VERY_SMALL_SIGNAL);
}
static void
merge_curves (boost::shared_ptr<Evoral::ControlList> dst,
boost::shared_ptr<const Evoral::ControlList> curve1,
boost::shared_ptr<const Evoral::ControlList> curve2)
{
Evoral::ControlList::EventList::size_type size = curve1->size();
//curve lengths must match for now
if (size != curve2->size()) {
return;
}
Evoral::ControlList::const_iterator c1 = curve1->begin();
int count = 0;
for (Evoral::ControlList::const_iterator c2 = curve2->begin(); c2!=curve2->end(); c2++ ) {
float v1 = accurate_coefficient_to_dB((*c1)->value);
float v2 = accurate_coefficient_to_dB((*c2)->value);
double interp = v1 * ( 1.0-( (double)count / (double)size) );
interp += v2 * ( (double)count / (double)size );
interp = dB_to_coefficient(interp);
dst->fast_simple_add ( (*c1)->when, interp );
c1++;
count++;
}
}
void
AudioRegion::make_property_quarks ()
{
Properties::envelope_active.property_id = g_quark_from_static_string (X_("envelope-active"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for envelope-active = %1\n", Properties::envelope_active.property_id));
Properties::default_fade_in.property_id = g_quark_from_static_string (X_("default-fade-in"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-in = %1\n", Properties::default_fade_in.property_id));
Properties::default_fade_out.property_id = g_quark_from_static_string (X_("default-fade-out"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for default-fade-out = %1\n", Properties::default_fade_out.property_id));
Properties::fade_in_active.property_id = g_quark_from_static_string (X_("fade-in-active"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-in-active = %1\n", Properties::fade_in_active.property_id));
Properties::fade_out_active.property_id = g_quark_from_static_string (X_("fade-out-active"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for fade-out-active = %1\n", Properties::fade_out_active.property_id));
Properties::scale_amplitude.property_id = g_quark_from_static_string (X_("scale-amplitude"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for scale-amplitude = %1\n", Properties::scale_amplitude.property_id));
Properties::fade_in.property_id = g_quark_from_static_string (X_("FadeIn"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for FadeIn = %1\n", Properties::fade_in.property_id));
Properties::inverse_fade_in.property_id = g_quark_from_static_string (X_("InverseFadeIn"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for InverseFadeIn = %1\n", Properties::inverse_fade_in.property_id));
Properties::fade_out.property_id = g_quark_from_static_string (X_("FadeOut"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for FadeOut = %1\n", Properties::fade_out.property_id));
Properties::inverse_fade_out.property_id = g_quark_from_static_string (X_("InverseFadeOut"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for InverseFadeOut = %1\n", Properties::inverse_fade_out.property_id));
Properties::envelope.property_id = g_quark_from_static_string (X_("Envelope"));
DEBUG_TRACE (DEBUG::Properties, string_compose ("quark for Envelope = %1\n", Properties::envelope.property_id));
}
void
AudioRegion::register_properties ()
{
/* no need to register parent class properties */
add_property (_envelope_active);
add_property (_default_fade_in);
add_property (_default_fade_out);
add_property (_fade_in_active);
add_property (_fade_out_active);
add_property (_scale_amplitude);
add_property (_fade_in);
add_property (_inverse_fade_in);
add_property (_fade_out);
add_property (_inverse_fade_out);
add_property (_envelope);
}
#define AUDIOREGION_STATE_DEFAULT \
_envelope_active (Properties::envelope_active, false) \
, _default_fade_in (Properties::default_fade_in, true) \
, _default_fade_out (Properties::default_fade_out, true) \
, _fade_in_active (Properties::fade_in_active, true) \
, _fade_out_active (Properties::fade_out_active, true) \
, _scale_amplitude (Properties::scale_amplitude, 1.0) \
, _fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeInAutomation)))) \
, _inverse_fade_in (Properties::inverse_fade_in, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeInAutomation)))) \
, _fade_out (Properties::fade_out, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeOutAutomation)))) \
, _inverse_fade_out (Properties::inverse_fade_out, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter (FadeOutAutomation))))
#define AUDIOREGION_COPY_STATE(other) \
_envelope_active (Properties::envelope_active, other->_envelope_active) \
, _default_fade_in (Properties::default_fade_in, other->_default_fade_in) \
, _default_fade_out (Properties::default_fade_out, other->_default_fade_out) \
, _fade_in_active (Properties::fade_in_active, other->_fade_in_active) \
, _fade_out_active (Properties::fade_out_active, other->_fade_out_active) \
, _scale_amplitude (Properties::scale_amplitude, other->_scale_amplitude) \
, _fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_fade_in.val()))) \
, _inverse_fade_in (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_inverse_fade_in.val()))) \
, _fade_out (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_fade_out.val()))) \
, _inverse_fade_out (Properties::fade_in, boost::shared_ptr<AutomationList> (new AutomationList (*other->_inverse_fade_out.val())))
/* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
void
AudioRegion::init ()
{
register_properties ();
suspend_property_changes();
set_default_fades ();
set_default_envelope ();
resume_property_changes();
listen_to_my_curves ();
connect_to_analysis_changed ();
connect_to_header_position_offset_changed ();
}
/** Constructor for use by derived types only */
AudioRegion::AudioRegion (Session& s, framepos_t start, framecnt_t len, std::string name)
: Region (s, start, len, name, DataType::AUDIO)
, AUDIOREGION_STATE_DEFAULT
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter(EnvelopeAutomation))))
, _automatable (s)
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
init ();
assert (_sources.size() == _master_sources.size());
}
/** Basic AudioRegion constructor */
AudioRegion::AudioRegion (const SourceList& srcs)
: Region (srcs)
, AUDIOREGION_STATE_DEFAULT
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (Evoral::Parameter(EnvelopeAutomation))))
, _automatable(srcs[0]->session())
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
init ();
assert (_sources.size() == _master_sources.size());
}
AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
: Region (other)
, AUDIOREGION_COPY_STATE (other)
/* As far as I can see, the _envelope's times are relative to region position, and have nothing
to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
*/
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val(), 0, other->_length)))
, _automatable (other->session())
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
/* don't use init here, because we got fade in/out from the other region
*/
register_properties ();
listen_to_my_curves ();
connect_to_analysis_changed ();
connect_to_header_position_offset_changed ();
assert(_type == DataType::AUDIO);
assert (_sources.size() == _master_sources.size());
}
AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, framecnt_t offset)
: Region (other, offset)
, AUDIOREGION_COPY_STATE (other)
/* As far as I can see, the _envelope's times are relative to region position, and have nothing
to do with sources (and hence _start). So when we copy the envelope, we just use the supplied offset.
*/
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val(), offset, other->_length)))
, _automatable (other->session())
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
/* don't use init here, because we got fade in/out from the other region
*/
register_properties ();
listen_to_my_curves ();
connect_to_analysis_changed ();
connect_to_header_position_offset_changed ();
assert(_type == DataType::AUDIO);
assert (_sources.size() == _master_sources.size());
}
AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, const SourceList& srcs)
: Region (boost::static_pointer_cast<const Region>(other), srcs)
, AUDIOREGION_COPY_STATE (other)
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList (*other->_envelope.val())))
, _automatable (other->session())
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
/* make-a-sort-of-copy-with-different-sources constructor (used by audio filter) */
register_properties ();
listen_to_my_curves ();
connect_to_analysis_changed ();
connect_to_header_position_offset_changed ();
assert (_sources.size() == _master_sources.size());
}
AudioRegion::AudioRegion (SourceList& srcs)
: Region (srcs)
, AUDIOREGION_STATE_DEFAULT
, _envelope (Properties::envelope, boost::shared_ptr<AutomationList> (new AutomationList(Evoral::Parameter(EnvelopeAutomation))))
, _automatable(srcs[0]->session())
, _fade_in_suspended (0)
, _fade_out_suspended (0)
{
init ();
assert(_type == DataType::AUDIO);
assert (_sources.size() == _master_sources.size());
}
AudioRegion::~AudioRegion ()
{
}
void
AudioRegion::post_set (const PropertyChange& /*ignored*/)
{
if (!_sync_marked) {
_sync_position = _start;
}
/* return to default fades if the existing ones are too long */
if (_left_of_split) {
if (_fade_in->back()->when >= _length) {
set_default_fade_in ();
}
set_default_fade_out ();
_left_of_split = false;
}
if (_right_of_split) {
if (_fade_out->back()->when >= _length) {
set_default_fade_out ();
}
set_default_fade_in ();
_right_of_split = false;
}
/* If _length changed, adjust our gain envelope accordingly */
_envelope->truncate_end (_length);
}
void
AudioRegion::connect_to_analysis_changed ()
{
for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
(*i)->AnalysisChanged.connect_same_thread (*this, boost::bind (&AudioRegion::invalidate_transients, this));
}
}
void
AudioRegion::connect_to_header_position_offset_changed ()
{
set<boost::shared_ptr<Source> > unique_srcs;
for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
/* connect only once to HeaderPositionOffsetChanged, even if sources are replicated
*/
if (unique_srcs.find (*i) == unique_srcs.end ()) {
unique_srcs.insert (*i);
boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource> (*i);
if (afs) {
afs->HeaderPositionOffsetChanged.connect_same_thread (*this, boost::bind (&AudioRegion::source_offset_changed, this));
}
}
}
}
void
AudioRegion::listen_to_my_curves ()
{
_envelope->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::envelope_changed, this));
_fade_in->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_in_changed, this));
_fade_out->StateChanged.connect_same_thread (*this, boost::bind (&AudioRegion::fade_out_changed, this));
}
void
AudioRegion::set_envelope_active (bool yn)
{
if (envelope_active() != yn) {
_envelope_active = yn;
send_change (PropertyChange (Properties::envelope_active));
}
}
ARDOUR::framecnt_t
AudioRegion::read_peaks (PeakData *buf, framecnt_t npeaks, framecnt_t offset, framecnt_t cnt, uint32_t chan_n, double samples_per_unit) const
{
if (chan_n >= _sources.size()) {
return 0;
}
if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, samples_per_unit)) {
return 0;
} else {
if (_scale_amplitude != 1.0f) {
for (framecnt_t n = 0; n < npeaks; ++n) {
buf[n].max *= _scale_amplitude;
buf[n].min *= _scale_amplitude;
}
}
return cnt;
}
}
/** @param buf Buffer to write data to (existing data will be overwritten).
* @param pos Position to read from as an offset from the region position.
* @param cnt Number of frames to read.
* @param channel Channel to read from.
*/
framecnt_t
AudioRegion::read (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
{
/* raw read, no fades, no gain, nada */
return read_from_sources (_sources, _length, buf, _position + pos, cnt, channel);
}
framecnt_t
AudioRegion::master_read_at (Sample *buf, Sample* /*mixdown_buffer*/, float* /*gain_buffer*/,
framepos_t position, framecnt_t cnt, uint32_t chan_n) const
{
/* do not read gain/scaling/fades and do not count this disk i/o in statistics */
assert (cnt >= 0);
return read_from_sources (
_master_sources, _master_sources.front()->length (_master_sources.front()->timeline_position()),
buf, position, cnt, chan_n
);
}
/** @param buf Buffer to mix data into.
* @param mixdown_buffer Scratch buffer for audio data.
* @param gain_buffer Scratch buffer for gain data.
* @param position Position within the session to read from.
* @param cnt Number of frames to read.
* @param chan_n Channel number to read.
*/
framecnt_t
AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
framepos_t position,
framecnt_t cnt,
uint32_t chan_n) const
{
/* We are reading data from this region into buf (possibly via mixdown_buffer).
The caller has verified that we cover the desired section.
*/
/* See doc/region_read.svg for a drawing which might help to explain
what is going on.
*/
assert (cnt >= 0);
if (n_channels() == 0) {
return 0;
}
/* WORK OUT WHERE TO GET DATA FROM */
framecnt_t to_read;
assert (position >= _position);
frameoffset_t const internal_offset = position - _position;
if (internal_offset >= _length) {
return 0; /* read nothing */
}
if ((to_read = min (cnt, _length - internal_offset)) == 0) {
return 0; /* read nothing */
}
/* COMPUTE DETAILS OF ANY FADES INVOLVED IN THIS READ */
/* Amount (length) of fade in that we are dealing with in this read */
framecnt_t fade_in_limit = 0;
/* Offset from buf / mixdown_buffer of the start
of any fade out that we are dealing with
*/
frameoffset_t fade_out_offset = 0;
/* Amount (length) of fade out that we are dealing with in this read */
framecnt_t fade_out_limit = 0;
framecnt_t fade_interval_start = 0;
/* Fade in */
if (_fade_in_active && _session.config.get_use_region_fades()) {
framecnt_t fade_in_length = (framecnt_t) _fade_in->back()->when;
/* see if this read is within the fade in */
if (internal_offset < fade_in_length) {
fade_in_limit = min (to_read, fade_in_length - internal_offset);
}
}
/* Fade out */
if (_fade_out_active && _session.config.get_use_region_fades()) {
/* see if some part of this read is within the fade out */
/* ................. >| REGION
_length
{ } FADE
fade_out_length
^
_length - fade_out_length
|--------------|
^internal_offset
^internal_offset + to_read
we need the intersection of [internal_offset,internal_offset+to_read] with
[_length - fade_out_length, _length]
*/
fade_interval_start = max (internal_offset, _length - framecnt_t (_fade_out->back()->when));
framecnt_t fade_interval_end = min(internal_offset + to_read, _length.val());
if (fade_interval_end > fade_interval_start) {
/* (part of the) the fade out is in this buffer */
fade_out_limit = fade_interval_end - fade_interval_start;
fade_out_offset = fade_interval_start - internal_offset;
}
}
/* READ DATA FROM THE SOURCE INTO mixdown_buffer.
We can never read directly into buf, since it may contain data
from a region `below' this one in the stack, and our fades (if they exist)
may need to mix with the existing data.
*/
if (read_from_sources (_sources, _length, mixdown_buffer, position, to_read, chan_n) != to_read) {
return 0;
}
/* APPLY REGULAR GAIN CURVES AND SCALING TO mixdown_buffer */
if (envelope_active()) {
_envelope->curve().get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
if (_scale_amplitude != 1.0f) {
for (framecnt_t n = 0; n < to_read; ++n) {
mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
}
} else {
for (framecnt_t n = 0; n < to_read; ++n) {
mixdown_buffer[n] *= gain_buffer[n];
}
}
} else if (_scale_amplitude != 1.0f) {
apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
}
/* APPLY FADES TO THE DATA IN mixdown_buffer AND MIX THE RESULTS INTO
* buf. The key things to realize here: (1) the fade being applied is
* (as of April 26th 2012) just the inverse of the fade in curve (2)
* "buf" contains data from lower regions already. So this operation
* fades out the existing material.
*/
if (fade_in_limit != 0) {
if (opaque()) {
if (_inverse_fade_in) {
/* explicit inverse fade in curve (e.g. for constant
* power), so we have to fetch it.
*/
_inverse_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
/* Fade the data from lower layers out */
for (framecnt_t n = 0; n < fade_in_limit; ++n) {
buf[n] *= gain_buffer[n];
}
/* refill gain buffer with the fade in */
_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
} else {
/* no explicit inverse fade in, so just use (1 - fade
* in) for the fade out of lower layers
*/
_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
for (framecnt_t n = 0; n < fade_in_limit; ++n) {
buf[n] *= 1 - gain_buffer[n];
}
}
} else {
_fade_in->curve().get_vector (internal_offset, internal_offset + fade_in_limit, gain_buffer, fade_in_limit);
}
/* Mix our newly-read data in, with the fade */
for (framecnt_t n = 0; n < fade_in_limit; ++n) {
buf[n] += mixdown_buffer[n] * gain_buffer[n];
}
}
if (fade_out_limit != 0) {
framecnt_t const curve_offset = fade_interval_start - (_length - _fade_out->back()->when);
if (opaque()) {
if (_inverse_fade_out) {
_inverse_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
/* Fade the data from lower levels in */
for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
buf[m] *= gain_buffer[n];
}
/* fetch the actual fade out */
_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
} else {
/* no explicit inverse fade out (which is
* actually a fade in), so just use (1 - fade
* out) for the fade in of lower layers
*/
_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
buf[m] *= 1 - gain_buffer[n];
}
}
} else {
_fade_out->curve().get_vector (curve_offset, curve_offset + fade_out_limit, gain_buffer, fade_out_limit);
}
/* Mix our newly-read data with whatever was already there,
with the fade out applied to our data.
*/
for (framecnt_t n = 0, m = fade_out_offset; n < fade_out_limit; ++n, ++m) {
buf[m] += mixdown_buffer[m] * gain_buffer[n];
}
}
/* MIX OR COPY THE REGION BODY FROM mixdown_buffer INTO buf */
framecnt_t const N = to_read - fade_in_limit - fade_out_limit;
if (N > 0) {
if (opaque ()) {
DEBUG_TRACE (DEBUG::AudioPlayback, string_compose ("Region %1 memcpy into buf @ %2 + %3, from mixdown buffer @ %4 + %5, len = %6 cnt was %7\n",
name(), buf, fade_in_limit, mixdown_buffer, fade_in_limit, N, cnt));
memcpy (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N * sizeof (Sample));
} else {
mix_buffers_no_gain (buf + fade_in_limit, mixdown_buffer + fade_in_limit, N);
}
}
return to_read;
}
/** Read data directly from one of our sources, accounting for the situation when the track has a different channel
* count to the region.
*
* @param srcs Source list to get our source from.
* @param limit Furthest that we should read, as an offset from the region position.
* @param buf Buffer to write data into (existing contents of the buffer will be overwritten)
* @param position Position to read from, in session frames.
* @param cnt Number of frames to read.
* @param chan_n Channel to read from.
* @return Number of frames read.
*/
framecnt_t
AudioRegion::read_from_sources (SourceList const & srcs, framecnt_t limit, Sample* buf, framepos_t position, framecnt_t cnt, uint32_t chan_n) const
{
frameoffset_t const internal_offset = position - _position;
if (internal_offset >= limit) {
return 0;
}
framecnt_t const to_read = min (cnt, limit - internal_offset);
if (to_read == 0) {
return 0;
}
if (chan_n < n_channels()) {
boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[chan_n]);
if (src->read (buf, _start + internal_offset, to_read) != to_read) {
return 0; /* "read nothing" */
}
} else {
/* track is N-channel, this region has fewer channels; silence the ones
we don't have.
*/
if (Config->get_replicate_missing_region_channels()) {
/* copy an existing channel's data in for this non-existant one */
uint32_t channel = n_channels() % chan_n;
boost::shared_ptr<AudioSource> src = boost::dynamic_pointer_cast<AudioSource> (srcs[channel]);
if (src->read (buf, _start + internal_offset, to_read) != to_read) {
return 0; /* "read nothing" */
}
} else {
/* use silence */
memset (buf, 0, sizeof (Sample) * to_read);
}
}
return to_read;
}
XMLNode&
AudioRegion::get_basic_state ()
{
XMLNode& node (Region::state ());
char buf[64];
LocaleGuard lg (X_("POSIX"));
snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
node.add_property ("channels", buf);
return node;
}
XMLNode&
AudioRegion::state ()
{
XMLNode& node (get_basic_state());
XMLNode *child;
LocaleGuard lg (X_("POSIX"));
child = node.add_child ("Envelope");
bool default_env = false;
// If there are only two points, the points are in the start of the region and the end of the region
// so, if they are both at 1.0f, that means the default region.
if (_envelope->size() == 2 &&
_envelope->front()->value == 1.0f &&
_envelope->back()->value==1.0f) {
if (_envelope->front()->when == 0 && _envelope->back()->when == _length) {
default_env = true;
}
}
if (default_env) {
child->add_property ("default", "yes");
} else {
child->add_child_nocopy (_envelope->get_state ());
}
child = node.add_child (X_("FadeIn"));
if (_default_fade_in) {
child->add_property ("default", "yes");
} else {
child->add_child_nocopy (_fade_in->get_state ());
}
if (_inverse_fade_in) {
child = node.add_child (X_("InverseFadeIn"));
child->add_child_nocopy (_inverse_fade_in->get_state ());
}
child = node.add_child (X_("FadeOut"));
if (_default_fade_out) {
child->add_property ("default", "yes");
} else {
child->add_child_nocopy (_fade_out->get_state ());
}
if (_inverse_fade_out) {
child = node.add_child (X_("InverseFadeOut"));
child->add_child_nocopy (_inverse_fade_out->get_state ());
}
return node;
}
int
AudioRegion::_set_state (const XMLNode& node, int version, PropertyChange& what_changed, bool send)
{
const XMLNodeList& nlist = node.children();
const XMLProperty *prop;
LocaleGuard lg (X_("POSIX"));
boost::shared_ptr<Playlist> the_playlist (_playlist.lock());
suspend_property_changes ();
if (the_playlist) {
the_playlist->freeze ();
}
/* this will set all our State members and stuff controlled by the Region.
It should NOT send any changed signals - that is our responsibility.
*/
Region::_set_state (node, version, what_changed, false);
if ((prop = node.property ("scale-gain")) != 0) {
float a = atof (prop->value().c_str());
if (a != _scale_amplitude) {
_scale_amplitude = a;
what_changed.add (Properties::scale_amplitude);
}
}
/* Now find envelope description and other related child items */
_envelope->freeze ();
for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
XMLNode *child;
XMLProperty *prop;
child = (*niter);
if (child->name() == "Envelope") {
_envelope->clear ();
if ((prop = child->property ("default")) != 0 || _envelope->set_state (*child, version)) {
set_default_envelope ();
}
_envelope->truncate_end (_length);
} else if (child->name() == "FadeIn") {
_fade_in->clear ();
if (((prop = child->property ("default")) != 0 && string_is_affirmative (prop->value())) || (prop = child->property ("steepness")) != 0) {
set_default_fade_in ();
} else {
XMLNode* grandchild = child->child ("AutomationList");
if (grandchild) {
_fade_in->set_state (*grandchild, version);
}
}
if ((prop = child->property ("active")) != 0) {
if (string_is_affirmative (prop->value())) {
set_fade_in_active (true);
} else {
set_fade_in_active (false);
}
}
} else if (child->name() == "FadeOut") {
_fade_out->clear ();
if (((prop = child->property ("default")) != 0 && (string_is_affirmative (prop->value()))) || (prop = child->property ("steepness")) != 0) {
set_default_fade_out ();
} else {
XMLNode* grandchild = child->child ("AutomationList");
if (grandchild) {
_fade_out->set_state (*grandchild, version);
}
}
if ((prop = child->property ("active")) != 0) {
if (string_is_affirmative (prop->value())) {
set_fade_out_active (true);
} else {
set_fade_out_active (false);
}
}
} else if (child->name() == "InverseFadeIn") {
XMLNode* grandchild = child->child ("AutomationList");
if (grandchild) {
_inverse_fade_in->set_state (*grandchild, version);
}
} else if (child->name() == "InverseFadeOut") {
XMLNode* grandchild = child->child ("AutomationList");
if (grandchild) {
_inverse_fade_out->set_state (*grandchild, version);
}
}
}
_envelope->thaw ();
resume_property_changes ();
if (send) {
send_change (what_changed);
}
if (the_playlist) {
the_playlist->thaw ();
}
return 0;
}
int
AudioRegion::set_state (const XMLNode& node, int version)
{
PropertyChange what_changed;
return _set_state (node, version, what_changed, true);
}
void
AudioRegion::set_fade_in_shape (FadeShape shape)
{
set_fade_in (shape, (framecnt_t) _fade_in->back()->when);
}
void
AudioRegion::set_fade_out_shape (FadeShape shape)
{
set_fade_out (shape, (framecnt_t) _fade_out->back()->when);
}
void
AudioRegion::set_fade_in (boost::shared_ptr<AutomationList> f)
{
_fade_in->freeze ();
*(_fade_in.val()) = *f;
_fade_in->thaw ();
_default_fade_in = false;
send_change (PropertyChange (Properties::fade_in));
}
void
AudioRegion::set_fade_in (FadeShape shape, framecnt_t len)
{
boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeInAutomation));
boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeInAutomation));
boost::shared_ptr<Evoral::ControlList> c3 (new Evoral::ControlList (FadeInAutomation));
_fade_in->freeze ();
_fade_in->clear ();
_inverse_fade_in->clear ();
switch (shape) {
case FadeLinear:
_fade_in->fast_simple_add (0.0, 0.0);
_fade_in->fast_simple_add (len, 1.0);
reverse_curve (_inverse_fade_in.val(), _fade_in.val());
break;
case FadeFast:
generate_db_fade (_fade_in.val(), len, 10, -60);
reverse_curve (c1, _fade_in.val());
_fade_in->copy_events (*c1);
generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
break;
case FadeSlow:
generate_db_fade (c1, len, 10, -1); // start off with a slow fade
generate_db_fade (c2, len, 10, -80); // end with a fast fade
merge_curves (_fade_in.val(), c1, c2);
reverse_curve (c3, _fade_in.val());
_fade_in->copy_events (*c3);
generate_inverse_power_curve (_inverse_fade_in.val(), _fade_in.val());
break;
case FadeConstantPower:
for (int i = 0; i < 9; ++i) {
float dist = (float) i / 10.0f;
_fade_in->fast_simple_add (len*dist, sin (dist*M_PI/2));
}
_fade_in->fast_simple_add (len, 1.0);
reverse_curve (_inverse_fade_in.val(), _fade_in.val());
break;
case FadeSymmetric:
//start with a nearly linear cuve
_fade_in->fast_simple_add (0, 1);
_fade_in->fast_simple_add (0.5*len, 0.6);
//now generate a fade-out curve by successively applying a gain drop
const float breakpoint = 0.7; //linear for first 70%
const int num_steps = 9;
for (int i = 2; i < num_steps; i++) {
float coeff = (1.0-breakpoint);
for (int j = 0; j < i; j++) {
coeff *= 0.5; //6dB drop per step
}
_fade_in->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
}
_fade_in->fast_simple_add (len, VERY_SMALL_SIGNAL);
reverse_curve (c3, _fade_in.val());
_fade_in->copy_events (*c3);
reverse_curve (_inverse_fade_in.val(), _fade_in.val());
break;
}
_default_fade_in = false;
_fade_in->thaw ();
send_change (PropertyChange (Properties::fade_in));
}
void
AudioRegion::set_fade_out (boost::shared_ptr<AutomationList> f)
{
_fade_out->freeze ();
*(_fade_out.val()) = *f;
_fade_out->thaw ();
_default_fade_out = false;
send_change (PropertyChange (Properties::fade_in));
}
void
AudioRegion::set_fade_out (FadeShape shape, framecnt_t len)
{
boost::shared_ptr<Evoral::ControlList> c1 (new Evoral::ControlList (FadeOutAutomation));
boost::shared_ptr<Evoral::ControlList> c2 (new Evoral::ControlList (FadeOutAutomation));
_fade_out->freeze ();
_fade_out->clear ();
_inverse_fade_out->clear ();
switch (shape) {
case FadeLinear:
_fade_out->fast_simple_add (0.0, 1.0);
_fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
reverse_curve (_inverse_fade_out.val(), _fade_out.val());
break;
case FadeFast:
generate_db_fade (_fade_out.val(), len, 10, -60);
generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
break;
case FadeSlow:
generate_db_fade (c1, len, 10, -1); //start off with a slow fade
generate_db_fade (c2, len, 10, -80); //end with a fast fade
merge_curves (_fade_out.val(), c1, c2);
generate_inverse_power_curve (_inverse_fade_out.val(), _fade_out.val());
break;
case FadeConstantPower:
//constant-power fades use a sin/cos relationship
//the cutoff is abrupt but it has the benefit of being symmetrical
_fade_out->fast_simple_add (0.0, 1.0);
for (int i = 1; i < 9; i++ ) {
float dist = (float)i/10.0;
_fade_out->fast_simple_add ((len * dist), cos(dist*M_PI/2));
}
_fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
reverse_curve (_inverse_fade_out.val(), _fade_out.val());
break;
case FadeSymmetric:
//start with a nearly linear cuve
_fade_out->fast_simple_add (0, 1);
_fade_out->fast_simple_add (0.5*len, 0.6);
//now generate a fade-out curve by successively applying a gain drop
const float breakpoint = 0.7; //linear for first 70%
const int num_steps = 9;
for (int i = 2; i < num_steps; i++) {
float coeff = (1.0-breakpoint);
for (int j = 0; j < i; j++) {
coeff *= 0.5; //6dB drop per step
}
_fade_out->fast_simple_add (len* (breakpoint+((1.0-breakpoint)*(double)i/(double)num_steps)), coeff);
}
_fade_out->fast_simple_add (len, VERY_SMALL_SIGNAL);
reverse_curve (_inverse_fade_out.val(), _fade_out.val());
break;
}
_default_fade_out = false;
_fade_out->thaw ();
send_change (PropertyChange (Properties::fade_out));
}
void
AudioRegion::set_fade_in_length (framecnt_t len)
{
if (len > _length) {
len = _length - 1;
}
if (len < 64) {
len = 64;
}
bool changed = _fade_in->extend_to (len);
if (changed) {
if (_inverse_fade_in) {
_inverse_fade_in->extend_to (len);
}
_default_fade_in = false;
send_change (PropertyChange (Properties::fade_in));
}
}
void
AudioRegion::set_fade_out_length (framecnt_t len)
{
if (len > _length) {
len = _length - 1;
}
if (len < 64) {
len = 64;
}
bool changed = _fade_out->extend_to (len);
if (changed) {
if (_inverse_fade_out) {
_inverse_fade_out->extend_to (len);
}
_default_fade_out = false;
send_change (PropertyChange (Properties::fade_out));
}
}
void
AudioRegion::set_fade_in_active (bool yn)
{
if (yn == _fade_in_active) {
return;
}
_fade_in_active = yn;
send_change (PropertyChange (Properties::fade_in_active));
}
void
AudioRegion::set_fade_out_active (bool yn)
{
if (yn == _fade_out_active) {
return;
}
_fade_out_active = yn;
send_change (PropertyChange (Properties::fade_out_active));
}
bool
AudioRegion::fade_in_is_default () const
{
return _fade_in->size() == 2 && _fade_in->front()->when == 0 && _fade_in->back()->when == 64;
}
bool
AudioRegion::fade_out_is_default () const
{
return _fade_out->size() == 2 && _fade_out->front()->when == 0 && _fade_out->back()->when == 64;
}
void
AudioRegion::set_default_fade_in ()
{
_fade_in_suspended = 0;
set_fade_in (FadeLinear, 64);
}
void
AudioRegion::set_default_fade_out ()
{
_fade_out_suspended = 0;
set_fade_out (FadeLinear, 64);
}
void
AudioRegion::set_default_fades ()
{
set_default_fade_in ();
set_default_fade_out ();
}
void
AudioRegion::set_default_envelope ()
{
_envelope->freeze ();
_envelope->clear ();
_envelope->fast_simple_add (0, 1.0f);
_envelope->fast_simple_add (_length, 1.0f);
_envelope->thaw ();
}
void
AudioRegion::recompute_at_end ()
{
/* our length has changed. recompute a new final point by interpolating
based on the the existing curve.
*/
_envelope->freeze ();
_envelope->truncate_end (_length);
_envelope->thaw ();
suspend_property_changes();
if (_left_of_split) {
set_default_fade_out ();
_left_of_split = false;
} else if (_fade_out->back()->when > _length) {
_fade_out->extend_to (_length);
send_change (PropertyChange (Properties::fade_out));
}
if (_fade_in->back()->when > _length) {
_fade_in->extend_to (_length);
send_change (PropertyChange (Properties::fade_in));
}
resume_property_changes();
}
void
AudioRegion::recompute_at_start ()
{
/* as above, but the shift was from the front */
_envelope->truncate_start (_length);
suspend_property_changes();
if (_right_of_split) {
set_default_fade_in ();
_right_of_split = false;
} else if (_fade_in->back()->when > _length) {
_fade_in->extend_to (_length);
send_change (PropertyChange (Properties::fade_in));
}
if (_fade_out->back()->when > _length) {
_fade_out->extend_to (_length);
send_change (PropertyChange (Properties::fade_out));
}
resume_property_changes();
}
int
AudioRegion::separate_by_channel (Session& /*session*/, vector<boost::shared_ptr<Region> >& v) const
{
SourceList srcs;
string new_name;
int n = 0;
if (_sources.size() < 2) {
return 0;
}
for (SourceList::const_iterator i = _sources.begin(); i != _sources.end(); ++i) {
srcs.clear ();
srcs.push_back (*i);
new_name = _name;
if (_sources.size() == 2) {
if (n == 0) {
new_name += "-L";
} else {
new_name += "-R";
}
} else {
new_name += '-';
new_name += ('0' + n + 1);
}
/* create a copy with just one source. prevent if from being thought of as
"whole file" even if it covers the entire source file(s).
*/
PropertyList plist;
plist.add (Properties::start, _start.val());
plist.add (Properties::length, _length.val());
plist.add (Properties::name, new_name);
plist.add (Properties::layer, layer ());
v.push_back(RegionFactory::create (srcs, plist));
v.back()->set_whole_file (false);
++n;
}
return 0;
}
framecnt_t
AudioRegion::read_raw_internal (Sample* buf, framepos_t pos, framecnt_t cnt, int channel) const
{
return audio_source(channel)->read (buf, pos, cnt);
}
void
AudioRegion::set_scale_amplitude (gain_t g)
{
boost::shared_ptr<Playlist> pl (playlist());
_scale_amplitude = g;
/* tell the diskstream we're in */
if (pl) {
pl->ContentsChanged();
}
/* tell everybody else */
send_change (PropertyChange (Properties::scale_amplitude));
}
/** @return the maximum (linear) amplitude of the region, or a -ve
* number if the Progress object reports that the process was cancelled.
*/
double
AudioRegion::maximum_amplitude (Progress* p) const
{
framepos_t fpos = _start;
framepos_t const fend = _start + _length;
double maxamp = 0;
framecnt_t const blocksize = 64 * 1024;
Sample buf[blocksize];
while (fpos < fend) {
uint32_t n;
framecnt_t const to_read = min (fend - fpos, blocksize);
for (n = 0; n < n_channels(); ++n) {
/* read it in */
if (read_raw_internal (buf, fpos, to_read, n) != to_read) {
return 0;
}
maxamp = compute_peak (buf, to_read, maxamp);
}
fpos += to_read;
if (p) {
p->set_progress (float (fpos - _start) / _length);
if (p->cancelled ()) {
return -1;
}
}
}
return maxamp;
}
/** Normalize using a given maximum amplitude and target, so that region
* _scale_amplitude becomes target / max_amplitude.
*/
void
AudioRegion::normalize (float max_amplitude, float target_dB)
{
gain_t target = dB_to_coefficient (target_dB);
if (target == 1.0f) {
/* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
that we may have clipped.
*/
target -= FLT_EPSILON;
}
if (max_amplitude == 0.0f) {
/* don't even try */
return;
}
if (max_amplitude == target) {
/* we can't do anything useful */
return;
}
set_scale_amplitude (target / max_amplitude);
}
void
AudioRegion::fade_in_changed ()
{
send_change (PropertyChange (Properties::fade_in));
}
void
AudioRegion::fade_out_changed ()
{
send_change (PropertyChange (Properties::fade_out));
}
void
AudioRegion::envelope_changed ()
{
send_change (PropertyChange (Properties::envelope));
}
void
AudioRegion::suspend_fade_in ()
{
if (++_fade_in_suspended == 1) {
if (fade_in_is_default()) {
set_fade_in_active (false);
}
}
}
void
AudioRegion::resume_fade_in ()
{
if (--_fade_in_suspended == 0 && _fade_in_suspended) {
set_fade_in_active (true);
}
}
void
AudioRegion::suspend_fade_out ()
{
if (++_fade_out_suspended == 1) {
if (fade_out_is_default()) {
set_fade_out_active (false);
}
}
}
void
AudioRegion::resume_fade_out ()
{
if (--_fade_out_suspended == 0 &&_fade_out_suspended) {
set_fade_out_active (true);
}
}
bool
AudioRegion::speed_mismatch (float sr) const
{
if (_sources.empty()) {
/* impossible, but ... */
return false;
}
float fsr = audio_source()->sample_rate();
return fsr != sr;
}
void
AudioRegion::source_offset_changed ()
{
/* XXX this fixes a crash that should not occur. It does occur
becauses regions are not being deleted when a session
is unloaded. That bug must be fixed.
*/
if (_sources.empty()) {
return;
}
boost::shared_ptr<AudioFileSource> afs = boost::dynamic_pointer_cast<AudioFileSource>(_sources.front());
if (afs && afs->destructive()) {
// set_start (source()->natural_position(), this);
set_position (source()->natural_position());
}
}
boost::shared_ptr<AudioSource>
AudioRegion::audio_source (uint32_t n) const
{
// Guaranteed to succeed (use a static cast for speed?)
return boost::dynamic_pointer_cast<AudioSource>(source(n));
}
int
AudioRegion::adjust_transients (frameoffset_t delta)
{
for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
(*x) = (*x) + delta;
}
send_change (PropertyChange (Properties::valid_transients));
return 0;
}
int
AudioRegion::update_transient (framepos_t old_position, framepos_t new_position)
{
for (AnalysisFeatureList::iterator x = _transients.begin(); x != _transients.end(); ++x) {
if ((*x) == old_position) {
(*x) = new_position;
send_change (PropertyChange (Properties::valid_transients));
break;
}
}
return 0;
}
void
AudioRegion::add_transient (framepos_t where)
{
_transients.push_back(where);
_valid_transients = true;
send_change (PropertyChange (Properties::valid_transients));
}
void
AudioRegion::remove_transient (framepos_t where)
{
_transients.remove(where);
_valid_transients = true;
send_change (PropertyChange (Properties::valid_transients));
}
int
AudioRegion::set_transients (AnalysisFeatureList& results)
{
_transients.clear();
_transients = results;
_valid_transients = true;
send_change (PropertyChange (Properties::valid_transients));
return 0;
}
int
AudioRegion::get_transients (AnalysisFeatureList& results, bool force_new)
{
boost::shared_ptr<Playlist> pl = playlist();
if (!pl) {
return -1;
}
if (_valid_transients && !force_new) {
results = _transients;
return 0;
}
SourceList::iterator s;
for (s = _sources.begin() ; s != _sources.end(); ++s) {
if (!(*s)->has_been_analysed()) {
cerr << "For " << name() << " source " << (*s)->name() << " has not been analyzed\n";
break;
}
}
if (s == _sources.end()) {
/* all sources are analyzed, merge data from each one */
for (s = _sources.begin() ; s != _sources.end(); ++s) {
/* find the set of transients within the bounds of this region */
AnalysisFeatureList::iterator low = lower_bound ((*s)->transients.begin(),
(*s)->transients.end(),
_start);
AnalysisFeatureList::iterator high = upper_bound ((*s)->transients.begin(),
(*s)->transients.end(),
_start + _length);
/* and add them */
results.insert (results.end(), low, high);
}
TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
/* translate all transients to current position */
for (AnalysisFeatureList::iterator x = results.begin(); x != results.end(); ++x) {
(*x) -= _start;
(*x) += _position;
}
_transients = results;
_valid_transients = true;
return 0;
}
/* no existing/complete transient info */
static bool analyse_dialog_shown = false; /* global per instance of Ardour */
if (!Config->get_auto_analyse_audio()) {
if (!analyse_dialog_shown) {
pl->session().Dialog (_("\
You have requested an operation that requires audio analysis.\n\n\
You currently have \"auto-analyse-audio\" disabled, which means \
that transient data must be generated every time it is required.\n\n\
If you are doing work that will require transient data on a \
regular basis, you should probably enable \"auto-analyse-audio\" \
then quit ardour and restart.\n\n\
This dialog will not display again. But you may notice a slight delay \
in this and future transient-detection operations.\n\
"));
analyse_dialog_shown = true;
}
}
TransientDetector t (pl->session().frame_rate());
bool existing_results = !results.empty();
_transients.clear ();
_valid_transients = false;
for (uint32_t i = 0; i < n_channels(); ++i) {
AnalysisFeatureList these_results;
t.reset ();
if (t.run ("", this, i, these_results)) {
return -1;
}
/* translate all transients to give absolute position */
for (AnalysisFeatureList::iterator i = these_results.begin(); i != these_results.end(); ++i) {
(*i) += _position;
}
/* merge */
_transients.insert (_transients.end(), these_results.begin(), these_results.end());
}
if (!results.empty()) {
if (existing_results) {
/* merge our transients into the existing ones, then clean up
those.
*/
results.insert (results.end(), _transients.begin(), _transients.end());
TransientDetector::cleanup_transients (results, pl->session().frame_rate(), 3.0);
}
/* make sure ours are clean too */
TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
} else {
TransientDetector::cleanup_transients (_transients, pl->session().frame_rate(), 3.0);
results = _transients;
}
_valid_transients = true;
return 0;
}
/** Find areas of `silence' within a region.
*
* @param threshold Threshold below which signal is considered silence (as a sample value)
* @param min_length Minimum length of silent period to be reported.
* @return Silent intervals, measured relative to the region start in the source
*/
AudioIntervalResult
AudioRegion::find_silence (Sample threshold, framecnt_t min_length, InterThreadInfo& itt) const
{
framecnt_t const block_size = 64 * 1024;
boost::scoped_array<Sample> loudest (new Sample[block_size]);
boost::scoped_array<Sample> buf (new Sample[block_size]);
framepos_t pos = _start;
framepos_t const end = _start + _length - 1;
AudioIntervalResult silent_periods;
bool in_silence = false;
frameoffset_t silence_start = 0;
while (pos < end && !itt.cancel) {
/* fill `loudest' with the loudest absolute sample at each instant, across all channels */
memset (loudest.get(), 0, sizeof (Sample) * block_size);
for (uint32_t n = 0; n < n_channels(); ++n) {
read_raw_internal (buf.get(), pos, block_size, n);
for (framecnt_t i = 0; i < block_size; ++i) {
loudest[i] = max (loudest[i], abs (buf[i]));
}
}
/* now look for silence */
for (framecnt_t i = 0; i < block_size; ++i) {
bool const silence = abs (loudest[i]) < threshold;
if (silence && !in_silence) {
/* non-silence to silence */
in_silence = true;
silence_start = pos + i;
} else if (!silence && in_silence) {
/* silence to non-silence */
in_silence = false;
if (pos + i - 1 - silence_start >= min_length) {
silent_periods.push_back (std::make_pair (silence_start, pos + i - 1));
}
}
}
pos += block_size;
itt.progress = (end-pos)/(double)_length;
}
if (in_silence && end - 1 - silence_start >= min_length) {
/* last block was silent, so finish off the last period */
silent_periods.push_back (std::make_pair (silence_start, end));
}
itt.done = true;
return silent_periods;
}
Evoral::Range<framepos_t>
AudioRegion::body_range () const
{
return Evoral::Range<framepos_t> (first_frame() + _fade_in->back()->when + 1, last_frame() - _fade_out->back()->when);
}
boost::shared_ptr<Region>
AudioRegion::get_single_other_xfade_region (bool start) const
{
boost::shared_ptr<Playlist> pl (playlist());
if (!pl) {
/* not currently in a playlist - xfade length is unbounded
(and irrelevant)
*/
return boost::shared_ptr<AudioRegion> ();
}
boost::shared_ptr<RegionList> rl;
if (start) {
rl = pl->regions_at (position());
} else {
rl = pl->regions_at (last_frame());
}
RegionList::iterator i;
boost::shared_ptr<Region> other;
uint32_t n = 0;
/* count and find the other region in a single pass through the list */
for (i = rl->begin(); i != rl->end(); ++i) {
if ((*i).get() != this) {
other = *i;
}
++n;
}
if (n != 2) {
/* zero or multiple regions stacked here - don't care about xfades */
return boost::shared_ptr<AudioRegion> ();
}
return other;
}
framecnt_t
AudioRegion::verify_xfade_bounds (framecnt_t len, bool start)
{
/* this is called from a UI to check on whether a new proposed
length for an xfade is legal or not. it returns the legal
length corresponding to @a len which may be shorter than or
equal to @a len itself.
*/
boost::shared_ptr<Region> other = get_single_other_xfade_region (start);
framecnt_t maxlen;
if (!other) {
/* zero or > 2 regions here, don't care about len, but
it can't be longer than the region itself.
*/
return min (length(), len);
}
/* we overlap a single region. clamp the length of an xfade to
the maximum possible duration of the overlap (if the other
region were trimmed appropriately).
*/
if (start) {
maxlen = other->latest_possible_frame() - position();
} else {
maxlen = last_frame() - other->earliest_possible_position();
}
return min (length(), min (maxlen, len));
}
extern "C" {
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)
{
return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (framecnt_t) npeaks, (framepos_t) start, (framecnt_t) cnt, n_chan,samples_per_unit);
}
uint32_t region_length_from_c (void *arg)
{
return ((AudioRegion *) arg)->length();
}
uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
{
return ( (AudioRegion *) arg)->audio_source()->available_peaks (zoom_factor) ;
}
} /* extern "C" */
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