ddd162bdb0
git-svn-id: svn://localhost/ardour2/branches/3.0@11334 d708f5d6-7413-0410-9779-e7cbd77b26cf
400 lines
10 KiB
C++
400 lines
10 KiB
C++
/*
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Copyright (C) 2004-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <algorithm>
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#include <cmath>
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#include "pbd/error.h"
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#include "rubberband/RubberBandStretcher.h"
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#include "ardour/types.h"
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#include "ardour/stretch.h"
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#include "ardour/pitch.h"
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#include "ardour/audiofilesource.h"
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#include "ardour/session.h"
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#include "ardour/audioregion.h"
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#include "ardour/progress.h"
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#include "i18n.h"
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using namespace std;
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using namespace ARDOUR;
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using namespace PBD;
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using namespace RubberBand;
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Pitch::Pitch (Session& s, TimeFXRequest& req)
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: RBEffect (s, req)
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{
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}
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RBStretch::RBStretch (Session& s, TimeFXRequest& req)
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: RBEffect (s, req)
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{
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}
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RBEffect::RBEffect (Session& s, TimeFXRequest& req)
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: Filter (s)
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, tsr (req)
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{
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}
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RBEffect::~RBEffect ()
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{
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}
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int
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RBEffect::run (boost::shared_ptr<Region> r, Progress* progress)
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{
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boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (r);
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if (!region) {
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error << "RBEffect::run() passed a non-audio region! WTF?" << endmsg;
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return -1;
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}
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SourceList nsrcs;
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framecnt_t done;
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int ret = -1;
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const framecnt_t bufsize = 256;
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gain_t* gain_buffer = 0;
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Sample** buffers = 0;
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char suffix[32];
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string new_name;
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string::size_type at;
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framepos_t pos = 0;
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framecnt_t avail = 0;
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boost::shared_ptr<AudioRegion> result;
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cerr << "RBEffect: source region: position = " << region->position()
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<< ", start = " << region->start()
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<< ", length = " << region->length()
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<< ", ancestral_start = " << region->ancestral_start()
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<< ", ancestral_length = " << region->ancestral_length()
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<< ", stretch " << region->stretch()
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<< ", shift " << region->shift() << endl;
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/*
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We have two cases to consider:
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1. The region has not been stretched before.
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In this case, we just want to read region->length() frames
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from region->start().
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We will create a new region of region->length() *
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tsr.time_fraction frames. The new region will have its
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start set to 0 (because it has a new audio file that begins
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at the start of the stretched area) and its ancestral_start
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set to region->start() (so that we know where to begin
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reading if we want to stretch it again).
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2. The region has been stretched before.
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The region starts at region->start() frames into its
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(possibly previously stretched) source file. But we don't
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want to read from its source file; we want to read from the
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file it was originally stretched from.
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The region's source begins at region->ancestral_start()
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frames into its master source file. Thus, we need to start
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reading at region->ancestral_start() + (region->start() /
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region->stretch()) frames into the master source. This
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value will also become the ancestral_start for the new
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region.
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We cannot use region->ancestral_length() to establish how
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many frames to read, because it won't be up to date if the
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region has been trimmed since it was last stretched. We
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must read region->length() / region->stretch() frames and
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stretch them by tsr.time_fraction * region->stretch(), for
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a new region of region->length() * tsr.time_fraction
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frames.
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Case 1 is of course a special case of 2, where
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region->ancestral_start() == 0 and region->stretch() == 1.
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When we ask to read from a region, we supply a position on
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the global timeline. The read function calculates the
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offset into the source as (position - region->position()) +
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region->start(). This calculation is used regardless of
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whether we are reading from a master or
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previously-stretched region. In order to read from a point
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n frames into the master source, we need to provide n -
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region->start() + region->position() as our position
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argument to master_read_at().
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Note that region->ancestral_length() is not used.
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I hope this is clear.
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*/
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double stretch = region->stretch() * tsr.time_fraction;
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double shift = region->shift() * tsr.pitch_fraction;
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framecnt_t read_start = region->ancestral_start() +
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framecnt_t(region->start() / (double)region->stretch());
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framecnt_t read_duration =
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framecnt_t(region->length() / (double)region->stretch());
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uint32_t channels = region->n_channels();
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RubberBandStretcher stretcher
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(session.frame_rate(), channels,
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(RubberBandStretcher::Options) tsr.opts, stretch, shift);
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progress->set_progress (0);
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tsr.done = false;
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stretcher.setExpectedInputDuration(read_duration);
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stretcher.setDebugLevel(1);
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/* the name doesn't need to be super-precise, but allow for 2 fractional
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digits just to disambiguate close but not identical FX
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*/
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if (stretch == 1.0) {
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snprintf (suffix, sizeof (suffix), "@%d", (int) floor (shift * 100.0f));
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} else if (shift == 1.0) {
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snprintf (suffix, sizeof (suffix), "@%d", (int) floor (stretch * 100.0f));
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} else {
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snprintf (suffix, sizeof (suffix), "@%d-%d",
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(int) floor (stretch * 100.0f),
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(int) floor (shift * 100.0f));
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}
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/* create new sources */
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if (make_new_sources (region, nsrcs, suffix)) {
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goto out;
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}
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gain_buffer = new gain_t[bufsize];
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buffers = new float *[channels];
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for (uint32_t i = 0; i < channels; ++i) {
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buffers[i] = new float[bufsize];
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}
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/* we read from the master (original) sources for the region,
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not the ones currently in use, in case it's already been
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subject to timefx. */
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/* study first, process afterwards. */
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pos = 0;
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avail = 0;
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done = 0;
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try {
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while (pos < read_duration && !tsr.cancel) {
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framecnt_t this_read = 0;
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for (uint32_t i = 0; i < channels; ++i) {
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this_read = 0;
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framepos_t this_time;
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this_time = min(bufsize, read_duration - pos);
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framepos_t this_position;
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this_position = read_start + pos -
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region->start() + region->position();
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this_read = region->master_read_at
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(buffers[i],
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buffers[i],
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gain_buffer,
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this_position,
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this_time,
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i);
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if (this_read != this_time) {
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error << string_compose
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(_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
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region->name(), this_position, this_time, this_read) << endmsg;
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goto out;
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}
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}
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pos += this_read;
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done += this_read;
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progress->set_progress (((float) done / read_duration) * 0.25);
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stretcher.study(buffers, this_read, pos == read_duration);
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}
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done = 0;
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pos = 0;
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while (pos < read_duration && !tsr.cancel) {
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framecnt_t this_read = 0;
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for (uint32_t i = 0; i < channels; ++i) {
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this_read = 0;
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framepos_t this_time;
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this_time = min(bufsize, read_duration - pos);
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framepos_t this_position;
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this_position = read_start + pos -
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region->start() + region->position();
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this_read = region->master_read_at
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(buffers[i],
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buffers[i],
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gain_buffer,
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this_position,
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this_time,
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i);
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if (this_read != this_time) {
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error << string_compose
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(_("tempoize: error reading data from %1 at %2 (wanted %3, got %4)"),
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region->name(), pos + region->position(), this_time, this_read) << endmsg;
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goto out;
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}
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}
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pos += this_read;
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done += this_read;
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progress->set_progress (0.25 + ((float) done / read_duration) * 0.75);
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stretcher.process(buffers, this_read, pos == read_duration);
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framecnt_t avail = 0;
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while ((avail = stretcher.available()) > 0) {
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this_read = min (bufsize, avail);
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stretcher.retrieve(buffers, this_read);
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for (uint32_t i = 0; i < nsrcs.size(); ++i) {
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boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
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if (!asrc) {
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continue;
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}
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if (asrc->write(buffers[i], this_read) != this_read) {
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error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg;
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goto out;
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}
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}
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}
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}
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while ((avail = stretcher.available()) >= 0) {
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framecnt_t this_read = min (bufsize, avail);
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stretcher.retrieve(buffers, this_read);
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for (uint32_t i = 0; i < nsrcs.size(); ++i) {
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boost::shared_ptr<AudioSource> asrc = boost::dynamic_pointer_cast<AudioSource>(nsrcs[i]);
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if (!asrc) {
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continue;
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}
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if (asrc->write(buffers[i], this_read) !=
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this_read) {
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error << string_compose (_("error writing tempo-adjusted data to %1"), nsrcs[i]->name()) << endmsg;
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goto out;
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}
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}
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}
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} catch (runtime_error& err) {
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error << _("timefx code failure. please notify ardour-developers.") << endmsg;
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error << err.what() << endmsg;
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goto out;
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}
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new_name = region->name();
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at = new_name.find ('@');
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// remove any existing stretch indicator
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if (at != string::npos && at > 2) {
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new_name = new_name.substr (0, at - 1);
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}
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new_name += suffix;
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ret = finish (region, nsrcs, new_name);
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/* now reset ancestral data for each new region */
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for (vector<boost::shared_ptr<Region> >::iterator x = results.begin(); x != results.end(); ++x) {
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(*x)->set_ancestral_data (read_start,
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read_duration,
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stretch,
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shift);
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(*x)->set_master_sources (region->master_sources());
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/* multiply the old (possibly previously stretched) region length by the extra
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stretch this time around to get its new length
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*/
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(*x)->set_length ((*x)->length() * tsr.time_fraction);
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}
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/* stretch region gain envelope */
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/* XXX: assuming we've only processed one input region into one result here */
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if (tsr.time_fraction != 1) {
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result = boost::dynamic_pointer_cast<AudioRegion> (results.front());
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assert (result);
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result->envelope()->x_scale (tsr.time_fraction);
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}
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out:
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delete [] gain_buffer;
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if (buffers) {
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for (uint32_t i = 0; i < channels; ++i) {
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delete buffers[i];
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}
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delete [] buffers;
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}
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if (ret || tsr.cancel) {
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for (SourceList::iterator si = nsrcs.begin(); si != nsrcs.end(); ++si) {
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(*si)->mark_for_remove ();
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}
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}
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tsr.done = true;
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return ret;
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}
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