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.
34 #include <sigc++/bind.h>
36 #include <pbd/error.h>
37 #include <pbd/basename.h>
38 #include <glibmm/thread.h>
39 #include <pbd/xml++.h>
41 #include <ardour/ardour.h>
42 #include <ardour/audioengine.h>
43 #include <ardour/diskstream.h>
44 #include <ardour/utils.h>
45 #include <ardour/configuration.h>
46 #include <ardour/audiofilesource.h>
47 #include <ardour/send.h>
48 #include <ardour/playlist.h>
49 #include <ardour/cycle_timer.h>
50 #include <ardour/region.h>
56 using namespace ARDOUR;
59 /* XXX This goes uninitialized when there is no ~/.ardour2 directory.
60 * I can't figure out why, so this will do for now (just stole the
61 * default from configuration_vars.h). 0 is not a good value for
62 * allocating buffer sizes..
64 ARDOUR::nframes_t Diskstream::disk_io_chunk_frames = 1024 * 256;
66 sigc::signal<void> Diskstream::DiskOverrun;
67 sigc::signal<void> Diskstream::DiskUnderrun;
69 Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
70 : SessionObject(sess, name)
75 Diskstream::Diskstream (Session& sess, const XMLNode& node)
76 : SessionObject(sess, "unnamed diskstream")
82 Diskstream::init (Flag f)
86 _alignment_style = ExistingMaterial;
87 _persistent_alignment_style = ExistingMaterial;
88 first_input_change = true;
89 i_am_the_modifier = 0;
90 g_atomic_int_set (&_record_enabled, 0);
91 was_recording = false;
92 capture_start_frame = 0;
94 _visible_speed = 1.0f;
96 _buffer_reallocation_required = false;
97 _seek_required = false;
98 first_recordable_frame = max_frames;
99 last_recordable_frame = max_frames;
104 adjust_capture_position = 0;
105 last_possibly_recording = 0;
107 wrap_buffer_size = 0;
108 speed_buffer_size = 0;
110 phi = (uint64_t) (0x1000000);
113 playback_distance = 0;
114 _read_data_count = 0;
115 _write_data_count = 0;
116 commit_should_unlock = false;
118 pending_overwrite = false;
120 overwrite_queued = false;
121 input_change_pending = NoChange;
124 Diskstream::~Diskstream ()
127 _playlist->release ();
131 Diskstream::set_io (IO& io)
134 set_align_style_from_io ();
138 Diskstream::handle_input_change (IOChange change, void *src)
140 Glib::Mutex::Lock lm (state_lock);
142 if (!(input_change_pending & change)) {
143 input_change_pending = IOChange (input_change_pending|change);
144 _session.request_input_change_handling ();
149 Diskstream::non_realtime_set_speed ()
151 if (_buffer_reallocation_required)
153 Glib::Mutex::Lock lm (state_lock);
154 allocate_temporary_buffers ();
156 _buffer_reallocation_required = false;
159 if (_seek_required) {
160 if (speed() != 1.0f || speed() != -1.0f) {
161 seek ((nframes_t) (_session.transport_frame() * (double) speed()), true);
164 seek (_session.transport_frame(), true);
167 _seek_required = false;
172 Diskstream::realtime_set_speed (double sp, bool global)
174 bool changed = false;
175 double new_speed = sp * _session.transport_speed();
177 if (_visible_speed != sp) {
182 if (new_speed != _actual_speed) {
184 nframes_t required_wrap_size = (nframes_t) floor (_session.get_block_size() *
185 fabs (new_speed)) + 1;
187 if (required_wrap_size > wrap_buffer_size) {
188 _buffer_reallocation_required = true;
191 _actual_speed = new_speed;
192 phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
197 _seek_required = true;
199 SpeedChanged (); /* EMIT SIGNAL */
202 return _buffer_reallocation_required || _seek_required;
206 Diskstream::prepare ()
209 playback_distance = 0;
213 Diskstream::recover ()
215 if (commit_should_unlock) {
222 Diskstream::set_capture_offset ()
225 /* can't capture, so forget it */
229 _capture_offset = _io->input_latency();
233 Diskstream::set_align_style (AlignStyle a)
235 if (record_enabled() && _session.actively_recording()) {
239 if (a != _alignment_style) {
240 _alignment_style = a;
241 AlignmentStyleChanged ();
246 Diskstream::set_loop (Location *location)
249 if (location->start() >= location->end()) {
250 error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
255 loop_location = location;
257 LoopSet (location); /* EMIT SIGNAL */
262 Diskstream::get_capture_start_frame (uint32_t n)
264 Glib::Mutex::Lock lm (capture_info_lock);
266 if (capture_info.size() > n) {
267 return capture_info[n]->start;
270 return capture_start_frame;
275 Diskstream::get_captured_frames (uint32_t n)
277 Glib::Mutex::Lock lm (capture_info_lock);
279 if (capture_info.size() > n) {
280 return capture_info[n]->frames;
283 return capture_captured;
288 Diskstream::set_roll_delay (ARDOUR::nframes_t nframes)
290 _roll_delay = nframes;
294 Diskstream::set_speed (double sp)
296 _session.request_diskstream_speed (*this, sp);
298 /* to force a rebuffering at the right place */
303 Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
306 Glib::Mutex::Lock lm (state_lock);
308 if (playlist == _playlist) {
312 plmod_connection.disconnect ();
313 plgone_connection.disconnect ();
316 _playlist->release();
319 _playlist = playlist;
322 if (!in_set_state && recordable()) {
323 reset_write_sources (false);
326 plmod_connection = _playlist->Modified.connect (mem_fun (*this, &Diskstream::playlist_modified));
327 plgone_connection = _playlist->GoingAway.connect (bind (mem_fun (*this, &Diskstream::playlist_deleted), boost::weak_ptr<Playlist>(_playlist)));
330 /* don't do this if we've already asked for it *or* if we are setting up
331 the diskstream for the very first time - the input changed handling will
332 take care of the buffer refill.
335 if (!overwrite_queued && !(_session.state_of_the_state() & Session::CannotSave)) {
336 _session.request_overwrite_buffer (this);
337 overwrite_queued = true;
340 PlaylistChanged (); /* EMIT SIGNAL */
341 _session.set_dirty ();
347 Diskstream::playlist_changed (Change ignored)
349 playlist_modified ();
353 Diskstream::playlist_modified ()
355 if (!i_am_the_modifier && !overwrite_queued) {
356 _session.request_overwrite_buffer (this);
357 overwrite_queued = true;
362 Diskstream::playlist_deleted (boost::weak_ptr<Playlist> wpl)
364 boost::shared_ptr<Playlist> pl (wpl.lock());
366 if (pl == _playlist) {
368 /* this catches an ordering issue with session destruction. playlists
369 are destroyed before diskstreams. we have to invalidate any handles
370 we have to the playlist.
380 Diskstream::set_name (const string& str)
384 playlist()->set_name (str);
386 SessionObject::set_name(str);
388 if (!in_set_state && recordable()) {
389 /* rename existing capture files so that they have the correct name */
390 return rename_write_sources ();
400 Diskstream::remove_region_from_last_capture (boost::weak_ptr<Region> wregion)
402 boost::shared_ptr<Region> region (wregion.lock());
408 _last_capture_regions.remove (region);