2 Copyright (C) 2009 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include <glibmm/thread.h>
21 #include "pbd/failed_constructor.h"
23 #include "ardour/audio_buffer.h"
24 #include "ardour/internal_return.h"
25 #include "ardour/mute_master.h"
26 #include "ardour/session.h"
27 #include "ardour/internal_send.h"
30 using namespace ARDOUR;
32 PBD::Signal1<void, pframes_t> InternalReturn::CycleStart;
34 InternalReturn::InternalReturn (Session& s)
37 CycleStart.connect_same_thread (*this, boost::bind (&InternalReturn::cycle_start, this, _1));
38 _display_to_user = false;
42 InternalReturn::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
44 if (!_active && !_pending_active) {
48 /* _sends is only modified with the process lock held, so this is ok, I think */
50 for (list<InternalSend*>::iterator i = _sends.begin(); i != _sends.end(); ++i) {
51 if ((*i)->active ()) {
52 bufs.merge_from ((*i)->get_buffers(), nframes);
56 _active = _pending_active;
60 InternalReturn::configure_io (ChanCount in, ChanCount out)
62 IOProcessor::configure_io (in, out);
63 allocate_buffers (_session.engine().frames_per_cycle());
68 InternalReturn::set_block_size (pframes_t nframes)
70 allocate_buffers (nframes);
75 InternalReturn::allocate_buffers (pframes_t nframes)
77 buffers.ensure_buffers (_configured_input, nframes);
78 buffers.set_count (_configured_input);
82 InternalReturn::add_send (InternalSend* send)
84 Glib::Mutex::Lock lm (_session.engine().process_lock());
85 _sends.push_back (send);
89 InternalReturn::remove_send (InternalSend* send)
91 Glib::Mutex::Lock lm (_session.engine().process_lock());
96 InternalReturn::cycle_start (pframes_t nframes)
98 /* called from process cycle - no lock necessary */
99 if (!_sends.empty ()) {
100 /* don't bother with this if nobody is going to feed us anything */
101 buffers.silence (nframes, 0);
106 InternalReturn::state (bool full)
108 XMLNode& node (Return::state (full));
110 node.add_property("type", "intreturn");
115 InternalReturn::get_state()
121 InternalReturn::set_state (const XMLNode& node, int version)
123 return Return::set_state (node, version);
127 InternalReturn::can_support_io_configuration (const ChanCount& in, ChanCount& out) const