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Robin Gareus 2020-03-28 01:13:14 +01:00
parent 08065e87b5
commit 97a221f1bb
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1 changed files with 146 additions and 162 deletions
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308
libs/ardour/rb_effect.cc
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@ -58,7 +58,6 @@ RBEffect::RBEffect (Session& s, TimeFXRequest& req)
, tsr (req) , tsr (req)
{ {
} }
RBEffect::~RBEffect () RBEffect::~RBEffect ()
@ -75,235 +74,227 @@ RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
return -1; return -1;
} }
SourceList nsrcs; SourceList nsrcs;
int ret = -1; int ret = -1;
const samplecnt_t bufsize = 8192; const samplecnt_t bufsize = 8192;
gain_t* gain_buffer = 0; gain_t* gain_buffer = 0;
Sample** buffers = 0; Sample** buffers = 0;
char suffix[32]; char suffix[32];
string new_name; string new_name;
string::size_type at; string::size_type at;
#ifndef NDEBUG #ifndef NDEBUG
cerr << "RBEffect: source region: position = " << region->position() cerr << "RBEffect: source region: position = " << region->position ()
<< ", start = " << region->start() << ", start = " << region->start ()
<< ", length = " << region->length() << ", length = " << region->length ()
<< ", ancestral_start = " << region->ancestral_start() << ", ancestral_start = " << region->ancestral_start ()
<< ", ancestral_length = " << region->ancestral_length() << ", ancestral_length = " << region->ancestral_length ()
<< ", stretch " << region->stretch() << ", stretch " << region->stretch ()
<< ", shift " << region->shift() << endl; << ", shift " << region->shift () << endl;
#endif #endif
/* /*
We have two cases to consider: * We have two cases to consider:
*
* 1. The region has not been stretched before.
*
* In this case, we just want to read region->length() samples
* from region->start().
*
* We will create a new region of region->length() *
* tsr.time_fraction samples. The new region will have its
* start set to 0 (because it has a new audio file that begins
* at the start of the stretched area) and its ancestral_start
* set to region->start() (so that we know where to begin
* reading if we want to stretch it again).
*
* 2. The region has been stretched before.
*
* The region starts at region->start() samples into its
* (possibly previously stretched) source file. But we don't
* want to read from its source file; we want to read from the
* file it was originally stretched from.
*
* The region's source begins at region->ancestral_start()
* samples into its master source file. Thus, we need to start
* reading at region->ancestral_start() + (region->start() /
* region->stretch()) samples into the master source. This
* value will also become the ancestral_start for the new
* region.
*
* We cannot use region->ancestral_length() to establish how
* many samples to read, because it won't be up to date if the
* region has been trimmed since it was last stretched. We
* must read region->length() / region->stretch() samples and
* stretch them by tsr.time_fraction * region->stretch(), for
* a new region of region->length() * tsr.time_fraction
* samples.
*
* Case 1 is of course a special case of 2, where
* region->ancestral_start() == 0 and region->stretch() == 1.
*
* When we ask to read from a region, we supply a position on
* the global timeline. The read function calculates the
* offset into the source as (position - region->position()) +
* region->start(). This calculation is used regardless of
* whether we are reading from a master or
* previously-stretched region. In order to read from a point
* n samples into the master source, we need to provide n -
* region->start() + region->position() as our position
* argument to master_read_at().
*
* Note that region->ancestral_length() is not used.
*
* I hope this is clear.
*/
1. The region has not been stretched before. double stretch = region->stretch () * tsr.time_fraction;
double shift = region->shift () * tsr.pitch_fraction;
In this case, we just want to read region->length() samples samplecnt_t read_start = region->ancestral_start () +
from region->start(). samplecnt_t (region->start () / (double)region->stretch ());
We will create a new region of region->length() *
tsr.time_fraction samples. The new region will have its
start set to 0 (because it has a new audio file that begins
at the start of the stretched area) and its ancestral_start
set to region->start() (so that we know where to begin
reading if we want to stretch it again).
2. The region has been stretched before.
The region starts at region->start() samples into its
(possibly previously stretched) source file. But we don't
want to read from its source file; we want to read from the
file it was originally stretched from.
The region's source begins at region->ancestral_start()
samples into its master source file. Thus, we need to start
reading at region->ancestral_start() + (region->start() /
region->stretch()) samples into the master source. This
value will also become the ancestral_start for the new
region.
We cannot use region->ancestral_length() to establish how
many samples to read, because it won't be up to date if the
region has been trimmed since it was last stretched. We
must read region->length() / region->stretch() samples and
stretch them by tsr.time_fraction * region->stretch(), for
a new region of region->length() * tsr.time_fraction
samples.
Case 1 is of course a special case of 2, where
region->ancestral_start() == 0 and region->stretch() == 1.
When we ask to read from a region, we supply a position on
the global timeline. The read function calculates the
offset into the source as (position - region->position()) +
region->start(). This calculation is used regardless of
whether we are reading from a master or
previously-stretched region. In order to read from a point
n samples into the master source, we need to provide n -
region->start() + region->position() as our position
argument to master_read_at().
Note that region->ancestral_length() is not used.
I hope this is clear.
*/
double stretch = region->stretch() * tsr.time_fraction;
double shift = region->shift() * tsr.pitch_fraction;
samplecnt_t read_start = region->ancestral_start() +
samplecnt_t(region->start() / (double)region->stretch());
samplecnt_t read_duration = samplecnt_t read_duration =
samplecnt_t(region->length() / (double)region->stretch()); samplecnt_t (region->length () / (double)region->stretch ());
uint32_t channels = region->n_channels(); uint32_t channels = region->n_channels ();
#ifndef NDEBUG #ifndef NDEBUG
cerr << "RBStretcher: input-len = " << read_duration cerr << "RBStretcher: input-len = " << read_duration
<< ", rate = " << session.sample_rate() << ", rate = " << session.sample_rate ()
<< ", channels = " << channels << ", channels = " << channels
<< ", opts = " << tsr.opts << ", opts = " << tsr.opts
<< ", stretch = " << stretch << ", stretch = " << stretch
<< ", shift = " << shift << endl; << ", shift = " << shift << endl;
#endif #endif
RubberBandStretcher stretcher (session.sample_rate(), channels, RubberBandStretcher stretcher (session.sample_rate (), channels,
(RubberBandStretcher::Options) tsr.opts, (RubberBandStretcher::Options)tsr.opts,
stretch, shift); stretch, shift);
progress->set_progress (0); progress->set_progress (0);
tsr.done = false; tsr.done = false;
stretcher.setDebugLevel(1); stretcher.setDebugLevel (1);
stretcher.setExpectedInputDuration(read_duration); stretcher.setExpectedInputDuration (read_duration);
/* the name doesn't need to be super-precise, but allow for 2 fractional /* the name doesn't need to be super-precise, but allow for 2 fractional
digits just to disambiguate close but not identical FX * digits just to disambiguate close but not identical FX
*/ */
if (stretch == 1.0) { if (stretch == 1.0) {
snprintf (suffix, sizeof (suffix), "@%d", (int) floor (shift * 100.0f)); snprintf (suffix, sizeof (suffix), "@%d", (int)floor (shift * 100.0f));
} else if (shift == 1.0) { } else if (shift == 1.0) {
snprintf (suffix, sizeof (suffix), "@%d", (int) floor (stretch * 100.0f)); snprintf (suffix, sizeof (suffix), "@%d", (int)floor (stretch * 100.0f));
} else { } else {
snprintf (suffix, sizeof (suffix), "@%d-%d", snprintf (suffix, sizeof (suffix), "@%d-%d",
(int) floor (stretch * 100.0f), (int)floor (stretch * 100.0f),
(int) floor (shift * 100.0f)); (int)floor (shift * 100.0f));
} }
/* create new sources */ /* create new sources */
samplepos_t pos = 0; samplepos_t pos = 0;
if (make_new_sources (region, nsrcs, suffix)) { if (make_new_sources (region, nsrcs, suffix)) {
goto out; goto out;
} }
gain_buffer = new gain_t[bufsize]; gain_buffer = new gain_t[bufsize];
buffers = new float *[channels]; buffers = new float*[channels];
for (uint32_t i = 0; i < channels; ++i) { for (uint32_t i = 0; i < channels; ++i) {
buffers[i] = new float[bufsize]; buffers[i] = new float[bufsize];
} }
/* we read from the master (original) sources for the region, /* we read from the master (original) sources for the region,
not the ones currently in use, in case it's already been * not the ones currently in use, in case it's already been
subject to timefx. */ * subject to timefx. */
/* study first, process afterwards. */ /* study first, process afterwards. */
try { try {
while (pos < read_duration && !tsr.cancel) { while (pos < read_duration && !tsr.cancel) {
samplecnt_t this_read = 0; samplecnt_t this_read = 0;
for (uint32_t i = 0; i < channels; ++i) { for (uint32_t i = 0; i < channels; ++i) {
samplepos_t this_time = min (bufsize, read_duration - pos);
samplepos_t this_time = min(bufsize, read_duration - pos);
samplepos_t this_position; samplepos_t this_position;
this_position = read_start + pos - this_position = read_start + pos -
region->start() + region->position(); region->start () + region->position ();
this_read = region->master_read_at this_read = region->master_read_at (buffers[i],
(buffers[i], buffers[i],
buffers[i], gain_buffer,
gain_buffer, this_position,
this_position, this_time,
this_time, i);
i);
if (this_read != this_time) { if (this_read != this_time) {
error << string_compose error << string_compose (_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
(_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"), region->name (), this_position, this_time, this_read)
region->name(), this_position, this_time, this_read) << endmsg; << endmsg;
goto out; goto out;
} }
} }
pos += this_read; pos += this_read;
progress->set_progress (((float) pos / read_duration) * 0.25); progress->set_progress (((float)pos / read_duration) * 0.25);
stretcher.study(buffers, this_read, pos == read_duration); stretcher.study (buffers, this_read, pos == read_duration);
} }
/* done studing, start process */ /* done studing, start process */
pos = 0; pos = 0;
while (pos < read_duration && !tsr.cancel) { while (pos < read_duration && !tsr.cancel) {
samplecnt_t this_read = 0; samplecnt_t this_read = 0;
for (uint32_t i = 0; i < channels; ++i) { for (uint32_t i = 0; i < channels; ++i) {
samplepos_t this_time; samplepos_t this_time;
this_time = min(bufsize, read_duration - pos); this_time = min (bufsize, read_duration - pos);
this_time = min(this_time, (samplepos_t) stretcher.getSamplesRequired()); this_time = min (this_time, (samplepos_t)stretcher.getSamplesRequired ());
samplepos_t this_position; samplepos_t this_position;
this_position = read_start + pos - this_position = read_start + pos -
region->start() + region->position(); region->start () + region->position ();
this_read = region->master_read_at this_read = region->master_read_at (buffers[i],
(buffers[i], buffers[i],
buffers[i], gain_buffer,
gain_buffer, this_position,
this_position, this_time,
this_time, i);
i);
if (this_read != this_time) { if (this_read != this_time) {
error << string_compose error << string_compose (_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
(_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"), region->name (), pos + region->position (), this_time, this_read)
region->name(), pos + region->position(), this_time, this_read) << endmsg; << endmsg;
goto out; goto out;
} }
} }
pos += this_read; pos += this_read;
progress->set_progress (0.25 + ((float) pos / read_duration) * 0.75); progress->set_progress (0.25 + ((float)pos / read_duration) * 0.75);
stretcher.process(buffers, this_read, pos == read_duration); stretcher.process (buffers, this_read, pos == read_duration);
samplecnt_t avail = 0; samplecnt_t avail = 0;
while ((avail = stretcher.available()) > 0) { while ((avail = stretcher.available ()) > 0) {
this_read = min (bufsize, avail); this_read = min (bufsize, avail);
this_read = stretcher.retrieve(buffers, this_read); this_read = stretcher.retrieve (buffers, this_read);
for (uint32_t i = 0; i < nsrcs.size(); ++i) { for (uint32_t i = 0; i < nsrcs.size (); ++i) {
boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource> (nsrcs[i]);
boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
if (!asrc) { if (!asrc) {
continue; continue;
} }
if (asrc->write(buffers[i], this_read) != this_read) { if (asrc->write (buffers[i], this_read) != this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg; error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name ()) << endmsg;
goto out; goto out;
} }
} }
@ -313,7 +304,7 @@ RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
/* completing */ /* completing */
samplecnt_t avail = 0; samplecnt_t avail = 0;
while ((avail = stretcher.available()) >= 0 && !tsr.cancel) { while ((avail = stretcher.available ()) >= 0 && !tsr.cancel) {
if (avail == 0) { if (avail == 0) {
/* wait for stretcher threads */ /* wait for stretcher threads */
Glib::usleep (10000); Glib::usleep (10000);
@ -322,18 +313,17 @@ RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
samplecnt_t this_read = min (bufsize, avail); samplecnt_t this_read = min (bufsize, avail);
this_read = stretcher.retrieve(buffers, this_read); this_read = stretcher.retrieve (buffers, this_read);
for (uint32_t i = 0; i < nsrcs.size(); ++i) { for (uint32_t i = 0; i < nsrcs.size (); ++i) {
boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource> (nsrcs[i]);
boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
if (!asrc) { if (!asrc) {
continue; continue;
} }
if (asrc->write(buffers[i], this_read) != if (asrc->write (buffers[i], this_read) !=
this_read) { this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg; error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name ()) << endmsg;
goto out; goto out;
} }
} }
@ -341,14 +331,14 @@ RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
} catch (runtime_error& err) { } catch (runtime_error& err) {
error << string_compose (_("programming error: %1"), X_("timefx code failure")) << endmsg; error << string_compose (_("programming error: %1"), X_("timefx code failure")) << endmsg;
error << err.what() << endmsg; error << err.what () << endmsg;
goto out; goto out;
} }
new_name = region->name(); new_name = region->name ();
at = new_name.find ('@'); at = new_name.find ('@');
// remove any existing stretch indicator /* remove any existing stretch indicator */
if (at != string::npos && at > 2) { if (at != string::npos && at > 2) {
new_name = new_name.substr (0, at - 1); new_name = new_name.substr (0, at - 1);
@ -362,49 +352,43 @@ RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
/* now reset ancestral data for each new region */ /* now reset ancestral data for each new region */
for (vector<boost::shared_ptr<Region> >::iterator x = results.begin(); x != results.end(); ++x) { for (vector<boost::shared_ptr<Region> >::iterator x = results.begin (); x != results.end (); ++x) {
(*x)->set_ancestral_data (read_start, (*x)->set_ancestral_data (read_start,
read_duration, read_duration,
stretch, stretch,
shift); shift);
(*x)->set_master_sources (region->master_sources()); (*x)->set_master_sources (region->master_sources ());
/* multiply the old (possibly previously stretched) region length by the extra /* multiply the old (possibly previously stretched) region length by the extra
stretch this time around to get its new length. this is a non-music based edit atm. * stretch this time around to get its new length. this is a non-music based edit atm.
*/ */
(*x)->set_length ((*x)->length() * tsr.time_fraction, 0); (*x)->set_length ((*x)->length () * tsr.time_fraction, 0);
} }
/* stretch region gain envelope */ /* stretch region gain envelope */
/* XXX: assuming we've only processed one input region into one result here */ /* XXX: assuming we've only processed one input region into one result here */
if (ret == 0 && tsr.time_fraction != 1) { if (ret == 0 && tsr.time_fraction != 1) {
boost::shared_ptr<AudioRegion> result = boost::dynamic_pointer_cast<AudioRegion> (results.front()); boost::shared_ptr<AudioRegion> result = boost::dynamic_pointer_cast<AudioRegion> (results.front ());
assert (result); assert (result);
result->envelope()->x_scale (tsr.time_fraction); result->envelope ()->x_scale (tsr.time_fraction);
} }
out: out:
delete [] gain_buffer; delete[] gain_buffer;
if (buffers) { if (buffers) {
for (uint32_t i = 0; i < channels; ++i) { for (uint32_t i = 0; i < channels; ++i) {
delete [] buffers[i]; delete[] buffers[i];
} }
delete [] buffers; delete[] buffers;
} }
if (ret || tsr.cancel) { if (ret || tsr.cancel) {
for (SourceList::iterator si = nsrcs.begin(); si != nsrcs.end(); ++si) { for (SourceList::iterator si = nsrcs.begin (); si != nsrcs.end (); ++si) {
(*si)->mark_for_remove (); (*si)->mark_for_remove ();
} }
} }
return ret; return ret;
} }