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livetrax/libs/ardour/session_click.cc

363 lines
9.5 KiB
C++

/*
* Copyright (C) 2002-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2006-2012 David Robillard <d@drobilla.net>
* Copyright (C) 2008-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2015-2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <list>
#include <cerrno>
#include "ardour/amp.h"
#include "ardour/audio_buffer.h"
#include "ardour/buffer_set.h"
#include "ardour/click.h"
#include "ardour/io.h"
#include "ardour/session.h"
#include "ardour/tempo.h"
#include "ardour/types.h"
#include <sndfile.h>
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
using namespace Temporal;
Pool Click::pool ("click", sizeof (Click), 1024);
/* pre-allocated vector for grid-point-lookup.
*
* Since Session::click() is never called concurrently
* from different threads, this can be static-global.
* (session.h does not include tempo.h so making this
* a Session member variable is tricky.)
*/
static TempoMapPoints _click_points;
void
Session::add_click (samplepos_t pos, bool emphasis)
{
if (emphasis) {
if (click_emphasis_data && Config->get_use_click_emphasis () == true) {
clicks.push_back (new Click (pos, click_emphasis_length, click_emphasis_data));
} else if (click_data && Config->get_use_click_emphasis () == false) {
clicks.push_back (new Click (pos, click_length, click_data));
}
} else if (click_data) {
clicks.push_back (new Click (pos, click_length, click_data));
}
}
void
Session::click (samplepos_t cycle_start, samplecnt_t nframes)
{
if (_click_io == 0) {
return;
}
/* transport_frame is audible-frame (what you hear,
* incl output latency). So internally we're ahead,
* we need to prepare frames that the user will hear
* in "output latency's" worth of time.
*/
samplecnt_t offset = _click_io_latency;
Glib::Threads::RWLock::WriterLock clickm (click_lock, Glib::Threads::TRY_LOCK);
/* how far have we moved since the last time the clicks got cleared */
const samplecnt_t click_distance = cycle_start + offset - _clicks_cleared;
if (!clickm.locked() || !_clicking || click_data == 0 || ((click_distance + nframes) < 0)) {
_click_io->silence (nframes);
return;
}
if (_click_rec_only && !actively_recording()) {
return;
}
/* range to check for clicks */
samplepos_t start = cycle_start + offset;
/* correct start, potentially */
start = max (start, (samplepos_t) 0);
samplecnt_t remain = nframes;
while (remain > 0) {
samplecnt_t move = remain;
Location* loop_location = get_play_loop () ? locations()->auto_loop_location () : NULL;
if (loop_location) {
const samplepos_t loop_start = loop_location->start_sample();
const samplepos_t loop_end = loop_location->end_sample();
if (start >= loop_end) {
samplecnt_t off = (start - loop_end) % (loop_end - loop_start);
start = loop_start + off;
move = std::min (remain, loop_end - start);
} else if (start + move >= loop_end) {
move = std::min (remain, loop_end - start);
}
if (move == 0) {
start = loop_start;
const samplecnt_t looplen = loop_end - loop_start;
move = std::min (remain, looplen);
}
}
const samplepos_t end = start + move;
_click_points.clear ();
TempoMap::use()->get_grid (_click_points, samples_to_superclock (start, sample_rate()), samples_to_superclock (end, sample_rate()));
if (_click_points.empty()) {
start += move;
remain -= move;
continue;
}
for (TempoMapPoints::iterator i = _click_points.begin(); i != _click_points.end(); ++i) {
if (superclock_to_samples ((*i).sclock(), sample_rate()) < start) {
continue;
}
assert (superclock_to_samples ((*i).sclock(), sample_rate()) < end);
if (i->bbt().is_bar() && (click_emphasis_data && Config->get_use_click_emphasis())) {
add_click ((*i).sample (sample_rate()), true);
} else {
add_click ((*i).sample (sample_rate()), false);
}
}
start += move;
remain -= move;
}
clickm.release ();
run_click (cycle_start, nframes);
}
void
Session::run_click (samplepos_t start, samplepos_t nframes)
{
Glib::Threads::RWLock::ReaderLock clickm (click_lock, Glib::Threads::TRY_LOCK);
/* align to output */
start += _click_io_latency;
if (!clickm.locked() || click_data == 0) {
_click_io->silence (nframes);
return;
}
Sample *buf;
BufferSet& bufs = get_scratch_buffers(ChanCount(DataType::AUDIO, 1));
buf = bufs.get_audio(0).data();
memset (buf, 0, sizeof (Sample) * nframes);
/* given a large output latency, `start' can be offset by by > 1 cycle.
* and needs to be mapped back into the loop-range */
Location* loop_location = get_play_loop () ? locations()->auto_loop_location () : NULL;
if (_count_in_samples > 0) {
loop_location = NULL;
}
bool crossloop = false;
samplecnt_t span = nframes;
if (loop_location) {
const samplepos_t loop_start = loop_location->start_sample ();
const samplepos_t loop_end = loop_location->end_sample ();
if (start >= loop_end) {
samplecnt_t off = (start - loop_end) % (loop_end - loop_start);
start = loop_start + off;
span = std::min (nframes, loop_end - start);
} else if (start + nframes >= loop_end) {
crossloop = true;
span = std::min (nframes, loop_end - start);
}
}
for (list<Click*>::iterator i = clicks.begin(); i != clicks.end(); ) {
Click *clk = *i;
if (loop_location) {
const samplepos_t loop_start = loop_location->start_sample ();
const samplepos_t loop_end = loop_location->end_sample ();
/* remove any clicks that are outside loop location, and not currently playing */
if ((clk->start < loop_start || clk->start >= loop_end) && clk->offset == 0) {
delete clk;
i = clicks.erase (i);
continue;
}
}
samplecnt_t internal_offset;
if (clk->start <= start || clk->offset > 0) {
internal_offset = 0;
} else if (clk->start < start + span) {
/* queue click at offset in current cycle */
internal_offset = clk->start - start;
} else if (crossloop) {
/* When loop wraps around in current cycle, take
* clicks at loop-start into account */
const samplepos_t loop_start = loop_location->start_sample ();
internal_offset = clk->start - loop_start + span;
} else if (_count_in_samples > 0) {
++i;
continue;
} else {
/* this can happen when locating
* with an active click */
delete clk;
i = clicks.erase (i);
continue;
}
if (internal_offset >= nframes) {
break;
}
samplecnt_t copy = min (clk->duration - clk->offset, nframes - internal_offset);
memcpy (buf + internal_offset, &clk->data[clk->offset], copy * sizeof (Sample));
clk->offset += copy;
if (clk->offset >= clk->duration) {
delete clk;
i = clicks.erase (i);
} else {
++i;
}
}
_click_gain->run (bufs, 0, 0, 1.0, nframes, false);
_click_io->copy_to_outputs (bufs, DataType::AUDIO, nframes, 0);
}
void
Session::setup_click_sounds (Sample** data, Sample const * default_data, samplecnt_t* length, samplecnt_t default_length, string const & path)
{
if (*data != default_data) {
delete[] *data;
*data = 0;
}
if (path.empty ()) {
*data = const_cast<Sample*> (default_data);
*length = default_length;
} else {
SF_INFO info;
SNDFILE* sndfile;
info.format = 0;
if ((sndfile = sf_open (path.c_str(), SFM_READ, &info)) == 0) {
char errbuf[256];
sf_error_str (0, errbuf, sizeof (errbuf) - 1);
warning << string_compose (_("cannot open click soundfile %1 (%2)"), path, errbuf) << endmsg;
_clicking = false;
return;
}
/* read the (possibly multi-channel) click data into a temporary buffer */
sf_count_t const samples = info.frames * info.channels;
Sample* tmp = new Sample[samples];
if (sf_readf_float (sndfile, tmp, info.frames) != info.frames) {
warning << _("cannot read data from click soundfile") << endmsg;
*data = 0;
_clicking = false;
} else {
*data = new Sample[info.frames];
*length = info.frames;
/* mix down to mono */
for (int i = 0; i < info.frames; ++i) {
(*data)[i] = 0;
for (int j = 0; j < info.channels; ++j) {
(*data)[i] = tmp[i * info.channels + j];
}
(*data)[i] /= info.channels;
}
}
delete[] tmp;
sf_close (sndfile);
}
}
void
Session::setup_click_sounds (int which)
{
clear_clicks ();
if (which == 0 || which == 1) {
setup_click_sounds (
&click_data,
default_click,
&click_length,
default_click_length,
Config->get_click_sound ()
);
}
if (which == 0 || which == -1) {
setup_click_sounds (
&click_emphasis_data,
default_click_emphasis,
&click_emphasis_length,
default_click_emphasis_length,
Config->get_click_emphasis_sound ()
);
}
}
void
Session::clear_clicks ()
{
Glib::Threads::RWLock::WriterLock lm (click_lock);
for (Clicks::iterator i = clicks.begin(); i != clicks.end(); ++i) {
delete *i;
}
clicks.clear ();
_clicks_cleared = _transport_sample;
}
void
Session::click_io_resync_latency (bool playback)
{
if (deletion_in_progress() || !playback) {
return;
}
_click_io_latency = _click_io->connected_latency (true);
}