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"
28 #include "ardour/audioengine.h"
31 using namespace ARDOUR;
33 PBD::Signal1<void, pframes_t> InternalReturn::CycleStart;
35 InternalReturn::InternalReturn (Session& s)
38 CycleStart.connect_same_thread (*this, boost::bind (&InternalReturn::cycle_start, this, _1));
39 _display_to_user = false;
43 InternalReturn::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
45 if (!_active && !_pending_active) {
49 /* _sends is only modified with the process lock held, so this is ok, I think */
51 for (list<InternalSend*>::iterator i = _sends.begin(); i != _sends.end(); ++i) {
52 if ((*i)->active ()) {
53 bufs.merge_from ((*i)->get_buffers(), nframes);
57 _active = _pending_active;
61 InternalReturn::configure_io (ChanCount in, ChanCount out)
63 IOProcessor::configure_io (in, out);
64 allocate_buffers (_session.engine().frames_per_cycle());
69 InternalReturn::set_block_size (pframes_t nframes)
71 allocate_buffers (nframes);
76 InternalReturn::allocate_buffers (pframes_t nframes)
78 buffers.ensure_buffers (_configured_input, nframes);
79 buffers.set_count (_configured_input);
83 InternalReturn::add_send (InternalSend* send)
85 Glib::Mutex::Lock lm (_session.engine().process_lock());
86 _sends.push_back (send);
90 InternalReturn::remove_send (InternalSend* send)
92 Glib::Mutex::Lock lm (_session.engine().process_lock());
97 InternalReturn::cycle_start (pframes_t nframes)
99 /* called from process cycle - no lock necessary */
100 if (!_sends.empty ()) {
101 /* don't bother with this if nobody is going to feed us anything */
102 buffers.silence (nframes, 0);
107 InternalReturn::state (bool full)
109 XMLNode& node (Return::state (full));
111 node.add_property("type", "intreturn");
116 InternalReturn::get_state()
122 InternalReturn::set_state (const XMLNode& node, int version)
124 return Return::set_state (node, version);
128 InternalReturn::can_support_io_configuration (const ChanCount& in, ChanCount& out) const