internal_return.cc

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/*
    Copyright (C) 2009 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 <glibmm/threads.h>

#include "ardour/internal_return.h"
#include "ardour/internal_send.h"
#include "ardour/route.h"

using namespace std;
using namespace ARDOUR;

InternalReturn::InternalReturn (Session& s)
        : Return (s, true)
{
        _display_to_user = false;
}

void
InternalReturn::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
{
        if (!_active && !_pending_active) {
                return;
        }

        Glib::Threads::Mutex::Lock lm (_sends_mutex, Glib::Threads::TRY_LOCK);
        
        if (lm.locked ()) {
                for (list<InternalSend*>::iterator i = _sends.begin(); i != _sends.end(); ++i) {
                        if ((*i)->active () && (!(*i)->source_route() || (*i)->source_route()->active())) {
                                bufs.merge_from ((*i)->get_buffers(), nframes);
                        }
                }
        }

        _active = _pending_active;
}

void
InternalReturn::add_send (InternalSend* send)
{
        Glib::Threads::Mutex::Lock lm (_sends_mutex);
        _sends.push_back (send);
}

void
InternalReturn::remove_send (InternalSend* send)
{
        Glib::Threads::Mutex::Lock lm (_sends_mutex);
        _sends.remove (send);
}

XMLNode&
InternalReturn::state (bool full)
{
        XMLNode& node (Return::state (full));
        /* override type */
        node.add_property("type", "intreturn");
        return node;
}

XMLNode&
InternalReturn::get_state()
{
        return state (true);
}

bool
InternalReturn::can_support_io_configuration (const ChanCount& in, ChanCount& out)
{
        out = in;
        return true;
}

bool
InternalReturn::configure_io (ChanCount in, ChanCount out)
{
        IOProcessor::configure_io (in, out);
        return true;
}