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/*
Copyright (C) 2010 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 "ardour/audio_buffer.h"
#include "ardour/unknown_processor.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
UnknownProcessor::UnknownProcessor (Session& s, XMLNode const & state)
: Processor (s, "")
, _state (state)
, have_ioconfig (false)
, saved_input (0)
, saved_output (0)
{
XMLProperty const * prop = state.property (X_("name"));
if (prop) {
set_name (prop->value ());
_display_to_user = true;
}
int have_io = 0;
XMLNodeList kids = state.children ();
for (XMLNodeIterator i = kids.begin(); i != kids.end(); ++i) {
if ((*i)->name() == X_("ConfiguredInput")) {
have_io |= 1;
saved_input = new ChanCount(**i);
}
if ((*i)->name() == X_("ConfiguredOutput")) {
have_io |= 2;
saved_output = new ChanCount(**i);
}
}
have_ioconfig = (have_io == 3);
}
UnknownProcessor::~UnknownProcessor () {
delete saved_input;;
delete saved_output;
}
XMLNode &
UnknownProcessor::state (bool)
{
return *(new XMLNode (_state));
}
bool
UnknownProcessor::can_support_io_configuration (const ChanCount &in, ChanCount & out) {
if (have_ioconfig && in == *saved_input) {
out = *saved_output;
return true;
} else if (!have_ioconfig) {
/* pass for old sessions.
*
* session load assumes processor config succeeds.
* if initial configuration fails, processors downstream
* remain unconfigured and at least the panner will assert/segfault.
*
* This may still result in impossible setup, however
* Route::configure_processors_unlocked() ignores configure_io() return value
* in the inner loop and configures all available processors.
*
* It can still lead to segfaults IFF the track has no inputs and this is a
* generator (processor_max_streams will be zero).
*/
PBD::warning << _("Using plugin-stub with unknown i/o configuration for: ") << name() << endmsg;
#if 0
/* No output channels are fine (or should be, there may be edge-cases with e.g sends).
*
* Discussion needed.
*
* This is the safer option (no audio output, no possible damage)
* and the way to go in the long run.
* An even better solution is to disable the route if there are missing plugins
* and/or impossible configurations.
*
* Currently no output channels results in awkward GUI route display and also
* breaks semantics in mixbus (which assumes that the route has channels required
* for the always present mixer-strip plugin).
*/
out = ChanCount ();
#else
out = in;
#endif
return true;
} else {
PBD::error << _("Using plugin-stub with mismatching i/o configuration for: ") << name() << endmsg;
out = in;
}
return true;
}
void
UnknownProcessor::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, double /*speed*/, pframes_t nframes, bool)
{
if (!have_ioconfig) {
return;
}
// silence excess output buffers
for (uint32_t i = saved_input->n_audio(); i < saved_output->n_audio(); ++i) {
bufs.get_audio (i).silence (nframes);
}
}
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