2 Copyright (C) 2000-2006 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.
18 $Id: diskstream.cc 567 2006-06-07 14:54:12Z trutkin $
35 #include <sigc++/bind.h>
37 #include <pbd/error.h>
38 #include <pbd/basename.h>
39 #include <glibmm/thread.h>
40 #include <pbd/xml++.h>
42 #include <ardour/ardour.h>
43 #include <ardour/audioengine.h>
44 #include <ardour/diskstream.h>
45 #include <ardour/utils.h>
46 #include <ardour/configuration.h>
47 #include <ardour/audiofilesource.h>
48 #include <ardour/destructive_filesource.h>
49 #include <ardour/send.h>
50 #include <ardour/playlist.h>
51 #include <ardour/cycle_timer.h>
52 #include <ardour/region.h>
58 using namespace ARDOUR;
61 /* XXX This goes uninitialized when there is no ~/.ardour2 directory.
62 * I can't figure out why, so this will do for now (just stole the
63 * default from configuration_vars.h). 0 is not a good value for
64 * allocating buffer sizes..
66 nframes_t Diskstream::disk_io_chunk_frames = 1024 * 256;
68 sigc::signal<void,list<boost::shared_ptr<Source> >*> Diskstream::DeleteSources;
69 sigc::signal<void> Diskstream::DiskOverrun;
70 sigc::signal<void> Diskstream::DiskUnderrun;
72 Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
80 Diskstream::Diskstream (Session& sess, const XMLNode& node)
88 Diskstream::init (Flag f)
92 _alignment_style = ExistingMaterial;
93 _persistent_alignment_style = ExistingMaterial;
94 first_input_change = true;
95 i_am_the_modifier = 0;
96 g_atomic_int_set (&_record_enabled, 0);
97 was_recording = false;
98 capture_start_frame = 0;
100 _visible_speed = 1.0f;
101 _actual_speed = 1.0f;
102 _buffer_reallocation_required = false;
103 _seek_required = false;
104 first_recordable_frame = max_frames;
105 last_recordable_frame = max_frames;
110 adjust_capture_position = 0;
111 last_possibly_recording = 0;
113 wrap_buffer_size = 0;
114 speed_buffer_size = 0;
116 phi = (uint64_t) (0x1000000);
119 playback_distance = 0;
120 _read_data_count = 0;
121 _write_data_count = 0;
123 pending_overwrite = false;
125 overwrite_queued = false;
126 input_change_pending = NoChange;
131 Diskstream::~Diskstream ()
133 // Taken by derived class destrctors.. should assure locked here somehow?
134 //Glib::Mutex::Lock lm (state_lock);
141 Diskstream::set_io (IO& io)
144 set_align_style_from_io ();
148 Diskstream::handle_input_change (IOChange change, void *src)
150 Glib::Mutex::Lock lm (state_lock);
152 if (!(input_change_pending & change)) {
153 input_change_pending = IOChange (input_change_pending|change);
154 _session.request_input_change_handling ();
159 Diskstream::non_realtime_set_speed ()
161 if (_buffer_reallocation_required)
163 Glib::Mutex::Lock lm (state_lock);
164 allocate_temporary_buffers ();
166 _buffer_reallocation_required = false;
169 if (_seek_required) {
170 if (speed() != 1.0f || speed() != -1.0f) {
171 seek ((nframes_t) (_session.transport_frame() * (double) speed()), true);
174 seek (_session.transport_frame(), true);
177 _seek_required = false;
182 Diskstream::realtime_set_speed (double sp, bool global)
184 bool changed = false;
185 double new_speed = sp * _session.transport_speed();
187 if (_visible_speed != sp) {
192 if (new_speed != _actual_speed) {
194 nframes_t required_wrap_size = (nframes_t) floor (_session.get_block_size() *
195 fabs (new_speed)) + 1;
197 if (required_wrap_size > wrap_buffer_size) {
198 _buffer_reallocation_required = true;
201 _actual_speed = new_speed;
202 phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
207 _seek_required = true;
209 SpeedChanged (); /* EMIT SIGNAL */
212 return _buffer_reallocation_required || _seek_required;
216 Diskstream::prepare ()
219 playback_distance = 0;
223 Diskstream::recover ()
230 Diskstream::set_capture_offset ()
233 /* can't capture, so forget it */
237 _capture_offset = _io->input_latency();
241 Diskstream::set_align_style (AlignStyle a)
243 if (record_enabled() && _session.actively_recording()) {
247 if (a != _alignment_style) {
248 _alignment_style = a;
249 AlignmentStyleChanged ();
254 Diskstream::set_loop (Location *location)
257 if (location->start() >= location->end()) {
258 error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
263 loop_location = location;
265 LoopSet (location); /* EMIT SIGNAL */
270 Diskstream::get_capture_start_frame (uint32_t n)
272 Glib::Mutex::Lock lm (capture_info_lock);
274 if (capture_info.size() > n) {
275 return capture_info[n]->start;
278 return capture_start_frame;
283 Diskstream::get_captured_frames (uint32_t n)
285 Glib::Mutex::Lock lm (capture_info_lock);
287 if (capture_info.size() > n) {
288 return capture_info[n]->frames;
291 return capture_captured;
296 Diskstream::set_roll_delay (nframes_t nframes)
298 _roll_delay = nframes;
302 Diskstream::set_speed (double sp)
304 _session.request_diskstream_speed (*this, sp);
306 /* to force a rebuffering at the right place */
311 Diskstream::use_playlist (Playlist* playlist)
314 Glib::Mutex::Lock lm (state_lock);
316 if (playlist == _playlist) {
320 plstate_connection.disconnect();
321 plmod_connection.disconnect ();
322 plgone_connection.disconnect ();
328 _playlist = playlist;
331 if (!in_set_state && recordable()) {
332 reset_write_sources (false);
335 plstate_connection = _playlist->StateChanged.connect (mem_fun (*this, &Diskstream::playlist_changed));
336 plmod_connection = _playlist->Modified.connect (mem_fun (*this, &Diskstream::playlist_modified));
337 plgone_connection = _playlist->GoingAway.connect (bind (mem_fun (*this, &Diskstream::playlist_deleted), _playlist));
340 if (!overwrite_queued) {
341 _session.request_overwrite_buffer (this);
342 overwrite_queued = true;
345 PlaylistChanged (); /* EMIT SIGNAL */
346 _session.set_dirty ();
352 Diskstream::playlist_changed (Change ignored)
354 playlist_modified ();
358 Diskstream::playlist_modified ()
360 if (!i_am_the_modifier && !overwrite_queued) {
361 _session.request_overwrite_buffer (this);
362 overwrite_queued = true;
367 Diskstream::playlist_deleted (Playlist* pl)
369 /* this catches an ordering issue with session destruction. playlists
370 are destroyed before diskstreams. we have to invalidate any handles
371 we have to the playlist.
378 Diskstream::set_name (string str)
382 playlist()->set_name (str);
385 if (!in_set_state && recordable()) {
386 /* rename existing capture files so that they have the correct name */
387 return rename_write_sources ();
397 Diskstream::set_destructive (bool yn)
399 if (yn != destructive()) {
400 reset_write_sources (true, true);
402 _flags |= Destructive;
404 _flags &= ~Destructive;