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livetrax/libs/ardour/port_insert.cc
Paul Davis 0e0c15833e new MTDM implementation from Fons' latest jack_delay implementation
git-svn-id: svn://localhost/ardour2/branches/3.0@13394 d708f5d6-7413-0410-9779-e7cbd77b26cf
2012-11-07 17:13:37 +00:00

300 lines
7.5 KiB
C++

/*
Copyright (C) 2000,2007 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
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 <string>
#include "pbd/xml++.h"
#include "ardour/audio_port.h"
#include "ardour/audioengine.h"
#include "ardour/delivery.h"
#include "ardour/io.h"
#include "ardour/mtdm.h"
#include "ardour/port_insert.h"
#include "ardour/session.h"
#include "ardour/types.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
string
PortInsert::name_and_id_new_insert (Session& s, uint32_t& bitslot)
{
bitslot = s.next_insert_id ();
return string_compose (_("insert %1"), bitslot+ 1);
}
PortInsert::PortInsert (Session& s, boost::shared_ptr<Pannable> pannable, boost::shared_ptr<MuteMaster> mm)
: IOProcessor (s, true, true, name_and_id_new_insert (s, _bitslot), "", DataType::AUDIO, true)
, _out (new Delivery (s, _output, pannable, mm, _name, Delivery::Insert))
{
_mtdm = 0;
_latency_detect = false;
_latency_flush_frames = false;
_measured_latency = 0;
}
PortInsert::~PortInsert ()
{
_session.unmark_insert_id (_bitslot);
delete _mtdm;
}
void
PortInsert::start_latency_detection ()
{
delete _mtdm;
_mtdm = new MTDM (_session.frame_rate());
_latency_flush_frames = false;
_latency_detect = true;
_measured_latency = 0;
}
void
PortInsert::stop_latency_detection ()
{
_latency_flush_frames = signal_latency() + _session.engine().frames_per_cycle();
_latency_detect = false;
}
void
PortInsert::set_measured_latency (framecnt_t n)
{
_measured_latency = n;
}
framecnt_t
PortInsert::latency() const
{
/* because we deliver and collect within the same cycle,
all I/O is necessarily delayed by at least frames_per_cycle().
if the return port for insert has its own latency, we
need to take that into account too.
*/
if (_measured_latency == 0) {
return _session.engine().frames_per_cycle() + _input->latency();
} else {
return _measured_latency;
}
}
void
PortInsert::run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, bool)
{
if (_output->n_ports().n_total() == 0) {
return;
}
if (_latency_detect) {
if (_input->n_ports().n_audio() != 0) {
AudioBuffer& outbuf (_output->ports().nth_audio_port(0)->get_audio_buffer (nframes));
Sample* in = _input->ports().nth_audio_port(0)->get_audio_buffer (nframes).data();
Sample* out = outbuf.data();
_mtdm->process (nframes, in, out);
outbuf.set_is_silent (false);
outbuf.set_written (true);
}
return;
} else if (_latency_flush_frames) {
/* wait for the entire input buffer to drain before picking up input again so that we can't
hear the remnants of whatever MTDM pumped into the pipeline.
*/
silence (nframes);
if (_latency_flush_frames > nframes) {
_latency_flush_frames -= nframes;
} else {
_latency_flush_frames = 0;
}
return;
}
if (!_active && !_pending_active) {
/* deliver silence */
silence (nframes);
goto out;
}
_out->run (bufs, start_frame, end_frame, nframes, true);
_input->collect_input (bufs, nframes, ChanCount::ZERO);
out:
_active = _pending_active;
}
XMLNode&
PortInsert::get_state(void)
{
return state (true);
}
XMLNode&
PortInsert::state (bool full)
{
XMLNode& node = IOProcessor::state(full);
char buf[32];
node.add_property ("type", "port");
snprintf (buf, sizeof (buf), "%" PRIu32, _bitslot);
node.add_property ("bitslot", buf);
snprintf (buf, sizeof (buf), "%" PRId64, _measured_latency);
node.add_property("latency", buf);
snprintf (buf, sizeof (buf), "%u", _session.get_block_size());
node.add_property("block_size", buf);
return node;
}
int
PortInsert::set_state (const XMLNode& node, int version)
{
XMLNodeList nlist = node.children();
XMLNodeIterator niter;
XMLPropertyList plist;
const XMLProperty *prop;
const XMLNode* insert_node = &node;
// legacy sessions: search for child Redirect node
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((*niter)->name() == "Redirect") {
insert_node = *niter;
break;
}
}
IOProcessor::set_state (*insert_node, version);
if ((prop = node.property ("type")) == 0) {
error << _("XML node describing port insert is missing the `type' field") << endmsg;
return -1;
}
if (prop->value() != "port") {
error << _("non-port insert XML used for port plugin insert") << endmsg;
return -1;
}
uint32_t blocksize = 0;
if ((prop = node.property ("block_size")) != 0) {
sscanf (prop->value().c_str(), "%u", &blocksize);
}
//if the jack period is the same as when the value was saved, we can recall our latency..
if ( (_session.get_block_size() == blocksize) && (prop = node.property ("latency")) != 0) {
uint32_t latency = 0;
sscanf (prop->value().c_str(), "%u", &latency);
_measured_latency = latency;
}
if (!node.property ("ignore-bitslot")) {
if ((prop = node.property ("bitslot")) == 0) {
_bitslot = _session.next_insert_id();
} else {
_session.unmark_insert_id (_bitslot);
sscanf (prop->value().c_str(), "%" PRIu32, &_bitslot);
_session.mark_insert_id (_bitslot);
}
}
return 0;
}
ARDOUR::framecnt_t
PortInsert::signal_latency() const
{
/* because we deliver and collect within the same cycle,
all I/O is necessarily delayed by at least frames_per_cycle().
if the return port for insert has its own latency, we
need to take that into account too.
*/
if (_measured_latency == 0) {
return _session.engine().frames_per_cycle() + _input->signal_latency();
} else {
return _measured_latency;
}
}
/** Caller must hold process lock */
bool
PortInsert::configure_io (ChanCount in, ChanCount out)
{
assert (!AudioEngine::instance()->process_lock().trylock());
/* for an insert, processor input corresponds to IO output, and vice versa */
if (_input->ensure_io (in, false, this) != 0) {
return false;
}
if (_output->ensure_io (out, false, this) != 0) {
return false;
}
return Processor::configure_io (in, out);
}
bool
PortInsert::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
{
out = in;
return true;
}
bool
PortInsert::set_name (const std::string& name)
{
bool ret = Processor::set_name (name);
ret = (ret && _input->set_name (name) && _output->set_name (name));
return ret;
}
void
PortInsert::activate ()
{
IOProcessor::activate ();
_out->activate ();
}
void
PortInsert::deactivate ()
{
IOProcessor::deactivate ();
_out->deactivate ();
}