radically rethink export/bounce/freeze code design. probably not 100% done by freeze...
[ardour.git] / libs / ardour / session_butler.cc
1 /*
2     Copyright (C) 1999-2002 Paul Davis
3
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.
8
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.
13
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.
17
18 */
19
20 #include <algorithm>
21 #include <string>
22 #include <cmath>
23 #include <cerrno>
24 #include <unistd.h>
25 #include <fcntl.h>
26 #include <poll.h>
27
28 #include <glibmm/thread.h>
29
30 #include "pbd/error.h"
31 #include "pbd/pthread_utils.h"
32 #include "pbd/stacktrace.h"
33
34 #include "ardour/audio_diskstream.h"
35 #include "ardour/audioengine.h"
36 #include "ardour/butler.h"
37 #include "ardour/configuration.h"
38 #include "ardour/crossfade.h"
39 #include "ardour/io.h"
40 #include "ardour/midi_diskstream.h"
41 #include "ardour/session.h"
42 #include "ardour/timestamps.h"
43 #include "ardour/track.h"
44
45 #include "i18n.h"
46
47 using namespace std;
48 using namespace ARDOUR;
49 using namespace PBD;
50
51 /* XXX put this in the right place */
52
53 static inline uint32_t next_power_of_two (uint32_t n)
54 {
55         --n;
56         n |= n >> 16;
57         n |= n >> 8;
58         n |= n >> 4;
59         n |= n >> 2;
60         n |= n >> 1;
61         ++n;
62         return n;
63 }
64
65 /*---------------------------------------------------------------------------
66  BUTLER THREAD
67  ---------------------------------------------------------------------------*/
68
69 void
70 Session::adjust_playback_buffering ()
71 {
72         request_stop (false, false);
73         SessionEvent *ev = new SessionEvent (SessionEvent::AdjustPlaybackBuffering, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
74         queue_event (ev);
75 }
76
77 void
78 Session::adjust_capture_buffering ()
79 {
80         request_stop (false, false);
81         SessionEvent *ev = new SessionEvent (SessionEvent::AdjustCaptureBuffering, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
82         queue_event (ev);
83 }
84
85 void
86 Session::schedule_playback_buffering_adjustment ()
87 {
88         add_post_transport_work (PostTransportAdjustPlaybackBuffering);
89         _butler->schedule_transport_work ();
90 }
91
92 void
93 Session::schedule_capture_buffering_adjustment ()
94 {
95         add_post_transport_work (PostTransportAdjustCaptureBuffering);
96         _butler->schedule_transport_work ();
97 }
98
99 void
100 Session::schedule_curve_reallocation ()
101 {
102         add_post_transport_work (PostTransportCurveRealloc);
103         _butler->schedule_transport_work ();
104 }
105
106 void
107 Session::request_overwrite_buffer (Track* t)
108 {
109         SessionEvent *ev = new SessionEvent (SessionEvent::Overwrite, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
110         ev->set_ptr (t);
111         queue_event (ev);
112 }
113
114 /** Process thread. */
115 void
116 Session::overwrite_some_buffers (Track* t)
117 {
118         if (actively_recording()) {
119                 return;
120         }
121
122         if (t) {
123
124                 t->set_pending_overwrite (true);
125
126         } else {
127
128                 boost::shared_ptr<RouteList> rl = routes.reader();
129                 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
130                         boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
131                         if (tr) {
132                                 tr->set_pending_overwrite (true);
133                         }
134                 }
135         }
136
137         add_post_transport_work (PostTransportOverWrite);
138         _butler->schedule_transport_work ();
139 }
140
141 uint32_t
142 Session::playback_load ()
143 {
144         return (uint32_t) g_atomic_int_get (&_playback_load);
145 }
146
147 uint32_t
148 Session::capture_load ()
149 {
150         return (uint32_t) g_atomic_int_get (&_capture_load);
151 }