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/*
Copyright (C) 2000 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 <algorithm>
#include <pbd/xml++.h>
#include <ardour/send.h>
#include <ardour/session.h>
#include <ardour/port.h>
#include <ardour/audio_port.h>
#include <ardour/buffer_set.h>
#include <ardour/meter.h>
#include "i18n.h"
using namespace ARDOUR;
using namespace PBD;
Send::Send (Session& s, Placement p)
: IOProcessor (s, string_compose (_("send %1"), (bitslot = s.next_send_id()) + 1), p)
{
_metering = false;
ProcessorCreated (this); /* EMIT SIGNAL */
}
Send::Send (Session& s, const XMLNode& node)
: IOProcessor (s, "send", PreFader)
{
_metering = false;
if (set_state (node)) {
throw failed_constructor();
}
ProcessorCreated (this); /* EMIT SIGNAL */
}
Send::Send (const Send& other)
: IOProcessor (other._session, string_compose (_("send %1"), (bitslot = other._session.next_send_id()) + 1), other.placement())
{
_metering = false;
ProcessorCreated (this); /* EMIT SIGNAL */
}
Send::~Send ()
{
GoingAway ();
}
XMLNode&
Send::get_state(void)
{
return state (true);
}
XMLNode&
Send::state(bool full)
{
XMLNode& node = IOProcessor::state(full);
char buf[32];
node.add_property ("type", "send");
snprintf (buf, sizeof (buf), "%" PRIu32, bitslot);
node.add_property ("bitslot", buf);
return node;
}
int
Send::set_state(const XMLNode& node)
{
XMLNodeList nlist = node.children();
XMLNodeIterator niter;
const XMLProperty* prop;
if ((prop = node.property ("bitslot")) == 0) {
bitslot = _session.next_send_id();
} else {
sscanf (prop->value().c_str(), "%" PRIu32, &bitslot);
_session.mark_send_id (bitslot);
}
const XMLNode* insert_node = &node;
/* Send has regular IO automation (gain, pan) */
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((*niter)->name() == "IOProcessor") {
insert_node = *niter;
} else if ((*niter)->name() == X_("Automation")) {
_io->set_automation_state (*(*niter), Evoral::Parameter(GainAutomation));
}
}
IOProcessor::set_state (*insert_node);
return 0;
}
void
Send::run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset)
{
if (active()) {
// we have to copy the input, because IO::deliver_output may alter the buffers
// in-place, which a send must never do.
BufferSet& sendbufs = _session.get_mix_buffers(bufs.count());
sendbufs.read_from(bufs, nframes);
assert(sendbufs.count() == bufs.count());
_io->deliver_output (sendbufs, start_frame, end_frame, nframes, offset);
if (_metering) {
if (_io->_gain == 0) {
_io->_meter->reset();
} else {
_io->_meter->run_in_place(_io->output_buffers(), start_frame, end_frame, nframes, offset);
}
}
} else {
_io->silence (nframes, offset);
if (_metering) {
_io->_meter->reset();
}
}
}
void
Send::set_metering (bool yn)
{
_metering = yn;
if (!_metering) {
/* XXX possible thread hazard here */
_io->peak_meter().reset();
}
}
bool
Send::can_support_io_configuration (const ChanCount& in, ChanCount& out_is_ignored) const
{
if (_io->input_maximum() == ChanCount::INFINITE && _io->output_maximum() == ChanCount::INFINITE) {
/* not configured yet */
return 1; /* we can support anything the first time we're asked */
} else {
/* the "input" config for a port insert corresponds to how
many output ports it will have.
*/
if (_io->output_maximum() == in) {
return 1;
}
}
return -1;
}
bool
Send::configure_io (ChanCount in, ChanCount out)
{
/* we're transparent no matter what. fight the power. */
if (out != in) {
return false;
}
_io->set_output_maximum (in);
_io->set_output_minimum (in);
_io->set_input_maximum (ChanCount::ZERO);
_io->set_input_minimum (ChanCount::ZERO);
if (_io->ensure_io (ChanCount::ZERO, in, false, this) != 0) {
return false;
}
Processor::configure_io(in, out);
_io->reset_panner();
return true;
}
ChanCount
Send::output_streams() const
{
// this method reflects the idea that from the perspective of the Route's ProcessorList,
// a send is just a passthrough. that doesn't match what the Send actually does with its
// data, but since what it does is invisible to the Route, it appears to be a passthrough.
return _configured_input;
}
ChanCount
Send::input_streams() const
{
return _configured_input;
}
void
Send::expect_inputs (const ChanCount& expected)
{
if (expected != expected_inputs) {
expected_inputs = expected;
_io->reset_panner ();
}
}
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