/*
- Copyright (C) 2004-2007 Paul Davis
+ Copyright (C) 2004-2007 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
#include <algorithm>
#include <cmath>
-#include <pbd/error.h>
#include <rubberband/RubberBandStretcher.h>
-#include <ardour/types.h>
-#include <ardour/stretch.h>
-#include <ardour/pitch.h>
-#include <ardour/audiofilesource.h>
-#include <ardour/session.h>
-#include <ardour/audioregion.h>
+#include "pbd/error.h"
-#include "i18n.h"
+#include "ardour/audioregion.h"
+#include "ardour/audiosource.h"
+#include "ardour/pitch.h"
+#include "ardour/progress.h"
+#include "ardour/session.h"
+#include "ardour/stretch.h"
+#include "ardour/types.h"
+
+#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
{
}
-Stretch::Stretch (Session& s, TimeFXRequest& req)
+RBStretch::RBStretch (Session& s, TimeFXRequest& req)
: RBEffect (s, req)
{
}
, tsr (req)
{
- tsr.progress = 0.0f;
+
}
RBEffect::~RBEffect ()
}
int
-RBEffect::run (boost::shared_ptr<AudioRegion> region)
+RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
{
+ boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
+
+ if (!region) {
+ error << "RBEffect::run() passed a non-audio region! WTF?" << endmsg;
+ return -1;
+ }
+
SourceList nsrcs;
- nframes_t done;
int ret = -1;
- const nframes_t bufsize = 256;
+ const framecnt_t bufsize = 256;
gain_t* gain_buffer = 0;
Sample** buffers = 0;
char suffix[32];
string new_name;
string::size_type at;
- nframes_t pos = 0;
- int avail = 0;
-
- RubberBandStretcher stretcher (session.frame_rate(), region->n_channels(),
- RubberBandStretcher::DefaultOptions,
- tsr.time_fraction, tsr.pitch_fraction);
-
- stretcher.setExpectedInputDuration(region->length());
- stretcher.setDebugLevel(1);
+ boost::shared_ptr<AudioRegion> result;
+
+ cerr << "RBEffect: source region: position = " << region->position()
+ << ", start = " << region->start()
+ << ", length = " << region->length()
+ << ", ancestral_start = " << region->ancestral_start()
+ << ", ancestral_length = " << region->ancestral_length()
+ << ", stretch " << region->stretch()
+ << ", shift " << region->shift() << endl;
+
+ /*
+ We have two cases to consider:
+
+ 1. The region has not been stretched before.
+
+ In this case, we just want to read region->length() frames
+ from region->start().
+
+ We will create a new region of region->length() *
+ tsr.time_fraction frames. 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() frames 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()
+ frames into its master source file. Thus, we need to start
+ reading at region->ancestral_start() + (region->start() /
+ region->stretch()) frames 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 frames 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() frames and
+ stretch them by tsr.time_fraction * region->stretch(), for
+ a new region of region->length() * tsr.time_fraction
+ frames.
+
+ 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 frames 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.
+ */
- tsr.progress = 0.0f;
- tsr.done = false;
+ double stretch = region->stretch() * tsr.time_fraction;
+ double shift = region->shift() * tsr.pitch_fraction;
+
+ framecnt_t read_start = region->ancestral_start() +
+ framecnt_t(region->start() / (double)region->stretch());
+
+ framecnt_t read_duration =
+ framecnt_t(region->length() / (double)region->stretch());
uint32_t channels = region->n_channels();
- nframes_t duration = region->length();
+
+ RubberBandStretcher stretcher
+ (session.frame_rate(), channels,
+ (RubberBandStretcher::Options) tsr.opts, stretch, shift);
+
+ progress->set_progress (0);
+ tsr.done = false;
+
+ stretcher.setExpectedInputDuration(read_duration);
+ stretcher.setDebugLevel(1);
/* the name doesn't need to be super-precise, but allow for 2 fractional
digits just to disambiguate close but not identical FX
*/
- if (tsr.time_fraction == 1.0) {
- snprintf (suffix, sizeof (suffix), "@%d", (int) floor (tsr.pitch_fraction * 100.0f));
- } else if (tsr.pitch_fraction == 1.0) {
- snprintf (suffix, sizeof (suffix), "@%d", (int) floor (tsr.time_fraction * 100.0f));
+ if (stretch == 1.0) {
+ snprintf (suffix, sizeof (suffix), "@%d", (int) floor (shift * 100.0f));
+ } else if (shift == 1.0) {
+ snprintf (suffix, sizeof (suffix), "@%d", (int) floor (stretch * 100.0f));
} else {
- snprintf (suffix, sizeof (suffix), "@%d-%d",
- (int) floor (tsr.time_fraction * 100.0f),
- (int) floor (tsr.pitch_fraction * 100.0f));
+ snprintf (suffix, sizeof (suffix), "@%d-%d",
+ (int) floor (stretch * 100.0f),
+ (int) floor (shift * 100.0f));
}
/* create new sources */
+ framepos_t pos = 0;
+ framecnt_t avail = 0;
+ framecnt_t done = 0;
+
if (make_new_sources (region, nsrcs, suffix)) {
goto out;
}
/* study first, process afterwards. */
- pos = 0;
- avail = 0;
- done = 0;
+ try {
+ while (pos < read_duration && !tsr.cancel) {
+
+ framecnt_t this_read = 0;
- try {
- while (pos < duration && !tsr.cancel) {
-
- nframes_t this_read = 0;
-
for (uint32_t i = 0; i < channels; ++i) {
-
- this_read = 0;
- nframes_t this_time;
-
- this_time = min(bufsize, duration - pos);
-
+
+ framepos_t this_time;
+ this_time = min(bufsize, read_duration - pos);
+
+ framepos_t this_position;
+ this_position = read_start + pos -
+ region->start() + region->position();
+
this_read = region->master_read_at
(buffers[i],
buffers[i],
gain_buffer,
- pos + region->position(),
+ this_position,
this_time,
i);
-
+
if (this_read != this_time) {
error << string_compose
- (_("tempoize: error reading data from %1"),
- nsrcs[i]->name()) << endmsg;
+ (_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
+ region->name(), this_position, this_time, this_read) << endmsg;
goto out;
}
}
-
+
pos += this_read;
done += this_read;
- tsr.progress = ((float) done / duration) * 0.75;
+ progress->set_progress (((float) done / read_duration) * 0.25);
- stretcher.study(buffers, this_read, pos == duration);
+ stretcher.study(buffers, this_read, pos == read_duration);
}
-
+
done = 0;
pos = 0;
- while (pos < duration && !tsr.cancel) {
-
- nframes_t this_read = 0;
-
+ while (pos < read_duration && !tsr.cancel) {
+
+ framecnt_t this_read = 0;
+
for (uint32_t i = 0; i < channels; ++i) {
-
- this_read = 0;
- nframes_t this_time;
-
- this_time = min(bufsize, duration - pos);
-
+
+ framepos_t this_time;
+ this_time = min(bufsize, read_duration - pos);
+
+ framepos_t this_position;
+ this_position = read_start + pos -
+ region->start() + region->position();
+
this_read = region->master_read_at
(buffers[i],
buffers[i],
gain_buffer,
- pos + region->position(),
+ this_position,
this_time,
i);
-
+
if (this_read != this_time) {
error << string_compose
- (_("tempoize: error reading data from %1"),
- nsrcs[i]->name()) << endmsg;
+ (_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
+ region->name(), pos + region->position(), this_time, this_read) << endmsg;
goto out;
}
}
pos += this_read;
done += this_read;
- tsr.progress = 0.75 + ((float) done / duration) * 0.25;
+ progress->set_progress (0.25 + ((float) done / read_duration) * 0.75);
- stretcher.process(buffers, this_read, pos == duration);
+ stretcher.process(buffers, this_read, pos == read_duration);
- int avail = 0;
+ framecnt_t avail = 0;
while ((avail = stretcher.available()) > 0) {
- this_read = min(bufsize, uint32_t(avail));
+ this_read = min (bufsize, avail);
stretcher.retrieve(buffers, this_read);
-
+
for (uint32_t i = 0; i < nsrcs.size(); ++i) {
- if (nsrcs[i]->write(buffers[i], this_read) !=
- this_read) {
+ boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
+ if (!asrc) {
+ continue;
+ }
+
+ if (asrc->write(buffers[i], this_read) != this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg;
goto out;
}
while ((avail = stretcher.available()) >= 0) {
- uint32_t this_read = min(bufsize, uint32_t(avail));
+ framecnt_t this_read = min (bufsize, avail);
stretcher.retrieve(buffers, this_read);
for (uint32_t i = 0; i < nsrcs.size(); ++i) {
- if (nsrcs[i]->write(buffers[i], this_read) !=
+ boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
+ if (!asrc) {
+ continue;
+ }
+
+ if (asrc->write(buffers[i], this_read) !=
this_read) {
error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg;
goto out;
}
} catch (runtime_error& err) {
- error << _("timefx code failure. please notify ardour-developers.") << endmsg;
+ error << string_compose (_("programming error: %1"), X_("timefx code failure")) << endmsg;
error << err.what() << endmsg;
goto out;
}
/* now reset ancestral data for each new region */
- for (vector<boost::shared_ptr<AudioRegion> >::iterator x = results.begin(); x != results.end(); ++x) {
- nframes64_t astart = (*x)->ancestral_start();
- nframes64_t alength = (*x)->ancestral_length();
- nframes_t start;
- nframes_t length;
-
- // note: tsr.time_fraction is a percentage of original length. 100 = no change,
- // 50 is half as long, 200 is twice as long, etc.
-
-
- float stretch = (*x)->stretch() * (tsr.time_fraction/100.0);
- float shift = (*x)->shift() * tsr.pitch_fraction;
+ for (vector<boost::shared_ptr<Region> >::iterator x = results.begin(); x != results.end(); ++x) {
+
+ (*x)->set_ancestral_data (read_start,
+ read_duration,
+ stretch,
+ shift);
+ (*x)->set_master_sources (region->master_sources());
+ /* 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.
+ */
+ (*x)->set_length ((*x)->length() * tsr.time_fraction, 0);
+ }
- start = (nframes_t) floor (astart + ((astart - (*x)->start()) / stretch));
- length = (nframes_t) floor (alength / stretch);
+ /* stretch region gain envelope */
+ /* XXX: assuming we've only processed one input region into one result here */
- (*x)->set_ancestral_data (start, length, stretch, shift);
+ if (tsr.time_fraction != 1) {
+ result = boost::dynamic_pointer_cast<AudioRegion> (results.front());
+ assert (result);
+ result->envelope()->x_scale (tsr.time_fraction);
}
out:
- if (gain_buffer) {
- delete [] gain_buffer;
- }
+ delete [] gain_buffer;
if (buffers) {
for (uint32_t i = 0; i < channels; ++i) {
(*si)->mark_for_remove ();
}
}
-
- tsr.done = true;
return ret;
}
-
+
projects / ardour.git / blobdiff