1 /*
2 * Copyright (C) 2010-2012 Paul Davis <paul@linuxaudiosystems.com>
3 * Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
4 * Copyright (C) 2011-2012 David Robillard <d@drobilla.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #include <iostream>
22
23 #include "pbd/compose.h"
24
25 #include "ardour/buffer_manager.h"
26 #include "ardour/thread_buffers.h"
27
28 using namespace ARDOUR;
29 using namespace PBD;
30
31 RingBufferNPT<ThreadBuffers*>* BufferManager::thread_buffers = 0;
32 std::list<ThreadBuffers*>* BufferManager::thread_buffers_list = 0;
33 Glib::Threads::Mutex BufferManager::rb_mutex;
34
35 using std::cerr;
36 using std::endl;
37
38 void
init(uint32_t size)39 BufferManager::init (uint32_t size)
40 {
41 thread_buffers = new ThreadBufferFIFO (size + 1); // must be one larger than requested
42 thread_buffers_list = new ThreadBufferList;
43
44 /* and populate with actual ThreadBuffers */
45
46 for (uint32_t n = 0; n < size; ++n) {
47 ThreadBuffers* ts = new ThreadBuffers;
48 thread_buffers->write (&ts, 1);
49 thread_buffers_list->push_back (ts);
50 }
51 // cerr << "Initialized thread buffers, readable count now " << thread_buffers->read_space() << endl;
52 }
53
54 ThreadBuffers*
get_thread_buffers()55 BufferManager::get_thread_buffers ()
56 {
57 Glib::Threads::Mutex::Lock em (rb_mutex);
58 ThreadBuffers* tbp;
59
60 if (thread_buffers->read (&tbp, 1) == 1) {
61 // cerr << "Got thread buffers, readable count now " << thread_buffers->read_space() << endl;
62 return tbp;
63 }
64
65 return 0;
66 }
67
68 void
put_thread_buffers(ThreadBuffers * tbp)69 BufferManager::put_thread_buffers (ThreadBuffers* tbp)
70 {
71 Glib::Threads::Mutex::Lock em (rb_mutex);
72 thread_buffers->write (&tbp, 1);
73 // cerr << "Put back thread buffers, readable count now " << thread_buffers->read_space() << endl;
74 }
75
76 void
ensure_buffers(ChanCount howmany,size_t custom)77 BufferManager::ensure_buffers (ChanCount howmany, size_t custom)
78 {
79 /* this is protected by the audioengine's process lock: we do not */
80
81 for (ThreadBufferList::iterator i = thread_buffers_list->begin (); i != thread_buffers_list->end (); ++i) {
82 (*i)->ensure_buffers (howmany, custom);
83 }
84 }
85