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.
33 #include <pbd/error.h>
34 #include <pbd/basename.h>
35 #include <glibmm/thread.h>
36 #include <pbd/xml++.h>
37 #include <pbd/memento_command.h>
38 #include <pbd/enumwriter.h>
40 #include <ardour/ardour.h>
41 #include <ardour/audioengine.h>
42 #include <ardour/audio_diskstream.h>
43 #include <ardour/utils.h>
44 #include <ardour/configuration.h>
45 #include <ardour/audiofilesource.h>
46 #include <ardour/send.h>
47 #include <ardour/region_factory.h>
48 #include <ardour/audioplaylist.h>
49 #include <ardour/playlist_factory.h>
50 #include <ardour/cycle_timer.h>
51 #include <ardour/audioregion.h>
52 #include <ardour/source_factory.h>
58 using namespace ARDOUR;
61 size_t AudioDiskstream::_working_buffers_size = 0;
62 Sample* AudioDiskstream::_mixdown_buffer = 0;
63 gain_t* AudioDiskstream::_gain_buffer = 0;
65 AudioDiskstream::AudioDiskstream (Session &sess, const string &name, Diskstream::Flag flag)
66 : Diskstream(sess, name, flag)
67 , deprecated_io_node(NULL)
69 /* prevent any write sources from being created */
79 AudioDiskstream::AudioDiskstream (Session& sess, const XMLNode& node)
80 : Diskstream(sess, node)
81 , deprecated_io_node(NULL)
86 if (set_state (node)) {
88 throw failed_constructor();
94 use_destructive_playlist ();
99 AudioDiskstream::init (Diskstream::Flag f)
103 /* there are no channels at this point, so these
104 two calls just get speed_buffer_size and wrap_buffer
105 size setup without duplicating their code.
108 set_block_size (_session.get_block_size());
109 allocate_temporary_buffers ();
112 assert(_n_channels == 1);
115 AudioDiskstream::~AudioDiskstream ()
120 /* don't be holding this lock as we exit the destructor, glib will wince
121 visibly since the mutex gets destroyed before we release it.
124 Glib::Mutex::Lock lm (state_lock);
125 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
133 AudioDiskstream::allocate_working_buffers()
135 assert(disk_io_frames() > 0);
137 _working_buffers_size = disk_io_frames();
138 _mixdown_buffer = new Sample[_working_buffers_size];
139 _gain_buffer = new gain_t[_working_buffers_size];
143 AudioDiskstream::free_working_buffers()
145 delete [] _mixdown_buffer;
146 delete [] _gain_buffer;
147 _working_buffers_size = 0;
153 AudioDiskstream::non_realtime_input_change ()
156 Glib::Mutex::Lock lm (state_lock);
158 if (input_change_pending == NoChange) {
162 if (input_change_pending & ConfigurationChanged) {
164 if (_io->n_inputs() > _n_channels) {
166 // we need to add new channel infos
168 int diff = _io->n_inputs() - channels.size();
170 for (int i = 0; i < diff; ++i) {
174 } else if (_io->n_inputs() < _n_channels) {
176 // we need to get rid of channels
178 int diff = channels.size() - _io->n_inputs();
180 for (int i = 0; i < diff; ++i) {
186 get_input_sources ();
187 set_capture_offset ();
189 if (first_input_change) {
190 set_align_style (_persistent_alignment_style);
191 first_input_change = false;
193 set_align_style_from_io ();
196 input_change_pending = NoChange;
199 /* reset capture files */
201 reset_write_sources (false);
203 /* now refill channel buffers */
205 if (speed() != 1.0f || speed() != -1.0f) {
206 seek ((nframes_t) (_session.transport_frame() * (double) speed()));
208 seek (_session.transport_frame());
213 AudioDiskstream::get_input_sources ()
215 uint32_t ni = _io->n_inputs();
217 for (uint32_t n = 0; n < ni; ++n) {
219 const char **connections = _io->input(n)->get_connections ();
220 ChannelInfo& chan = channels[n];
222 if (connections == 0 || connections[0] == 0) {
225 // _source->disable_metering ();
231 chan.source = _session.engine().get_port_by_name (connections[0]);
241 AudioDiskstream::find_and_use_playlist (const string& name)
243 boost::shared_ptr<AudioPlaylist> playlist;
245 if ((playlist = boost::dynamic_pointer_cast<AudioPlaylist> (_session.playlist_by_name (name))) == 0) {
246 playlist = boost::dynamic_pointer_cast<AudioPlaylist> (PlaylistFactory::create (_session, name));
250 error << string_compose(_("AudioDiskstream: Playlist \"%1\" isn't an audio playlist"), name) << endmsg;
254 return use_playlist (playlist);
258 AudioDiskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
260 assert(boost::dynamic_pointer_cast<AudioPlaylist>(playlist));
262 Diskstream::use_playlist(playlist);
268 AudioDiskstream::use_new_playlist ()
271 boost::shared_ptr<AudioPlaylist> playlist;
273 if (!in_set_state && destructive()) {
278 newname = Playlist::bump_name (_playlist->name(), _session);
280 newname = Playlist::bump_name (_name, _session);
283 if ((playlist = boost::dynamic_pointer_cast<AudioPlaylist> (PlaylistFactory::create (_session, newname, hidden()))) != 0) {
285 playlist->set_orig_diskstream_id (id());
286 return use_playlist (playlist);
294 AudioDiskstream::use_copy_playlist ()
296 assert(audio_playlist());
302 if (_playlist == 0) {
303 error << string_compose(_("AudioDiskstream %1: there is no existing playlist to make a copy of!"), _name) << endmsg;
308 boost::shared_ptr<AudioPlaylist> playlist;
310 newname = Playlist::bump_name (_playlist->name(), _session);
312 if ((playlist = boost::dynamic_pointer_cast<AudioPlaylist>(PlaylistFactory::create (audio_playlist(), newname))) != 0) {
313 playlist->set_orig_diskstream_id (id());
314 return use_playlist (playlist);
321 AudioDiskstream::setup_destructive_playlist ()
325 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
326 srcs.push_back ((*chan).write_source);
329 /* a single full-sized region */
331 boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0, max_frames - srcs.front()->natural_position(), _name));
332 _playlist->add_region (region, srcs.front()->natural_position());
336 AudioDiskstream::use_destructive_playlist ()
338 /* this is called from the XML-based constructor or ::set_destructive. when called,
339 we already have a playlist and a region, but we need to
340 set up our sources for write. we use the sources associated
341 with the (presumed single, full-extent) region.
344 boost::shared_ptr<Region> rp = _playlist->find_next_region (_session.current_start_frame(), Start, 1);
347 reset_write_sources (false, true);
351 boost::shared_ptr<AudioRegion> region = boost::dynamic_pointer_cast<AudioRegion> (rp);
354 throw failed_constructor();
357 /* be sure to stretch the region out to the maximum length */
359 region->set_length (max_frames - region->position(), this);
362 ChannelList::iterator chan;
364 for (n = 0, chan = channels.begin(); chan != channels.end(); ++chan, ++n) {
365 (*chan).write_source = boost::dynamic_pointer_cast<AudioFileSource>(region->source (n));
366 assert((*chan).write_source);
367 (*chan).write_source->set_allow_remove_if_empty (false);
369 /* this might be false if we switched modes, so force it */
371 (*chan).write_source->set_destructive (true);
374 /* the source list will never be reset for a destructive track */
378 AudioDiskstream::check_record_status (nframes_t transport_frame, nframes_t nframes, bool can_record)
380 int possibly_recording;
383 const int transport_rolling = 0x4;
384 const int track_rec_enabled = 0x2;
385 const int global_rec_enabled = 0x1;
387 /* merge together the 3 factors that affect record status, and compute
391 rolling = _session.transport_speed() != 0.0f;
392 possibly_recording = (rolling << 2) | (record_enabled() << 1) | can_record;
393 change = possibly_recording ^ last_possibly_recording;
395 if (possibly_recording == last_possibly_recording) {
401 /* if per-track or global rec-enable turned on while the other was already on, we've started recording */
403 if ((change & track_rec_enabled) && record_enabled() && (!(change & global_rec_enabled) && can_record) ||
404 ((change & global_rec_enabled) && can_record && (!(change & track_rec_enabled) && record_enabled()))) {
406 /* starting to record: compute first+last frames */
408 first_recordable_frame = transport_frame + _capture_offset;
409 last_recordable_frame = max_frames;
410 capture_start_frame = transport_frame;
412 if (!(last_possibly_recording & transport_rolling) && (possibly_recording & transport_rolling)) {
414 /* was stopped, now rolling (and recording) */
416 if (_alignment_style == ExistingMaterial) {
417 first_recordable_frame += _session.worst_output_latency();
419 first_recordable_frame += _roll_delay;
424 /* was rolling, but record state changed */
426 if (_alignment_style == ExistingMaterial) {
428 if (!Config->get_punch_in()) {
430 /* manual punch in happens at the correct transport frame
431 because the user hit a button. but to get alignment correct
432 we have to back up the position of the new region to the
433 appropriate spot given the roll delay.
436 capture_start_frame -= _roll_delay;
438 /* XXX paul notes (august 2005): i don't know why
442 first_recordable_frame += _capture_offset;
446 /* autopunch toggles recording at the precise
447 transport frame, and then the DS waits
448 to start recording for a time that depends
449 on the output latency.
452 first_recordable_frame += _session.worst_output_latency();
457 if (Config->get_punch_in()) {
458 first_recordable_frame += _roll_delay;
460 capture_start_frame -= _roll_delay;
466 if (_flags & Recordable) {
467 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
469 RingBufferNPT<CaptureTransition>::rw_vector transvec;
470 (*chan).capture_transition_buf->get_write_vector(&transvec);
472 if (transvec.len[0] > 0) {
473 transvec.buf[0]->type = CaptureStart;
474 transvec.buf[0]->capture_val = capture_start_frame;
475 (*chan).capture_transition_buf->increment_write_ptr(1);
479 fatal << X_("programming error: capture_transition_buf is full on rec start! inconceivable!")
485 } else if (!record_enabled() || !can_record) {
489 last_recordable_frame = transport_frame + _capture_offset;
491 if (_alignment_style == ExistingMaterial) {
492 last_recordable_frame += _session.worst_output_latency();
494 last_recordable_frame += _roll_delay;
498 last_possibly_recording = possibly_recording;
502 AudioDiskstream::process (nframes_t transport_frame, nframes_t nframes, nframes_t offset, bool can_record, bool rec_monitors_input)
505 ChannelList::iterator c;
507 nframes_t rec_offset = 0;
508 nframes_t rec_nframes = 0;
509 bool nominally_recording;
510 bool re = record_enabled ();
511 bool collect_playback = false;
513 /* if we've already processed the frames corresponding to this call,
514 just return. this allows multiple routes that are taking input
515 from this diskstream to call our ::process() method, but have
516 this stuff only happen once. more commonly, it allows both
517 the AudioTrack that is using this AudioDiskstream *and* the Session
518 to call process() without problems.
525 check_record_status (transport_frame, nframes, can_record);
527 nominally_recording = (can_record && re);
534 /* This lock is held until the end of AudioDiskstream::commit, so these two functions
535 must always be called as a pair. The only exception is if this function
536 returns a non-zero value, in which case, ::commit should not be called.
539 // If we can't take the state lock return.
540 if (!state_lock.trylock()) {
544 adjust_capture_position = 0;
546 for (c = channels.begin(); c != channels.end(); ++c) {
547 (*c).current_capture_buffer = 0;
548 (*c).current_playback_buffer = 0;
551 if (nominally_recording || (_session.get_record_enabled() && Config->get_punch_in())) {
554 ot = coverage (first_recordable_frame, last_recordable_frame, transport_frame, transport_frame + nframes);
561 case OverlapInternal:
562 /* ---------- recrange
565 rec_nframes = nframes;
570 /* |--------| recrange
573 rec_nframes = transport_frame + nframes - first_recordable_frame;
575 rec_offset = first_recordable_frame - transport_frame;
580 /* |--------| recrange
583 rec_nframes = last_recordable_frame - transport_frame;
587 case OverlapExternal:
588 /* |--------| recrange
589 -------------- transrange
591 rec_nframes = last_recordable_frame - last_recordable_frame;
592 rec_offset = first_recordable_frame - transport_frame;
596 if (rec_nframes && !was_recording) {
597 capture_captured = 0;
598 was_recording = true;
603 if (can_record && !_last_capture_regions.empty()) {
604 _last_capture_regions.clear ();
607 if (nominally_recording || rec_nframes) {
609 for (n = 0, c = channels.begin(); c != channels.end(); ++c, ++n) {
611 ChannelInfo& chan (*c);
613 chan.capture_buf->get_write_vector (&chan.capture_vector);
615 if (rec_nframes <= chan.capture_vector.len[0]) {
617 chan.current_capture_buffer = chan.capture_vector.buf[0];
619 /* note: grab the entire port buffer, but only copy what we were supposed to for recording, and use
623 memcpy (chan.current_capture_buffer, _io->input(n)->get_buffer (rec_nframes) + offset + rec_offset, sizeof (Sample) * rec_nframes);
627 nframes_t total = chan.capture_vector.len[0] + chan.capture_vector.len[1];
629 if (rec_nframes > total) {
634 Sample* buf = _io->input (n)->get_buffer (nframes) + offset;
635 nframes_t first = chan.capture_vector.len[0];
637 memcpy (chan.capture_wrap_buffer, buf, sizeof (Sample) * first);
638 memcpy (chan.capture_vector.buf[0], buf, sizeof (Sample) * first);
639 memcpy (chan.capture_wrap_buffer+first, buf + first, sizeof (Sample) * (rec_nframes - first));
640 memcpy (chan.capture_vector.buf[1], buf + first, sizeof (Sample) * (rec_nframes - first));
642 chan.current_capture_buffer = chan.capture_wrap_buffer;
649 finish_capture (rec_monitors_input);
656 /* data will be written to disk */
658 if (rec_nframes == nframes && rec_offset == 0) {
660 for (c = channels.begin(); c != channels.end(); ++c) {
661 (*c).current_playback_buffer = (*c).current_capture_buffer;
664 playback_distance = nframes;
669 /* we can't use the capture buffer as the playback buffer, because
670 we recorded only a part of the current process' cycle data
674 collect_playback = true;
677 adjust_capture_position = rec_nframes;
679 } else if (nominally_recording) {
681 /* can't do actual capture yet - waiting for latency effects to finish before we start*/
683 for (c = channels.begin(); c != channels.end(); ++c) {
684 (*c).current_playback_buffer = (*c).current_capture_buffer;
687 playback_distance = nframes;
691 collect_playback = true;
694 if (collect_playback) {
696 /* we're doing playback */
698 nframes_t necessary_samples;
700 /* no varispeed playback if we're recording, because the output .... TBD */
702 if (rec_nframes == 0 && _actual_speed != 1.0f) {
703 necessary_samples = (nframes_t) floor ((nframes * fabs (_actual_speed))) + 1;
705 necessary_samples = nframes;
708 for (c = channels.begin(); c != channels.end(); ++c) {
709 (*c).playback_buf->get_read_vector (&(*c).playback_vector);
714 for (c = channels.begin(); c != channels.end(); ++c, ++n) {
716 ChannelInfo& chan (*c);
718 if (necessary_samples <= chan.playback_vector.len[0]) {
720 chan.current_playback_buffer = chan.playback_vector.buf[0];
723 nframes_t total = chan.playback_vector.len[0] + chan.playback_vector.len[1];
725 if (necessary_samples > total) {
731 memcpy ((char *) chan.playback_wrap_buffer, chan.playback_vector.buf[0],
732 chan.playback_vector.len[0] * sizeof (Sample));
733 memcpy (chan.playback_wrap_buffer + chan.playback_vector.len[0], chan.playback_vector.buf[1],
734 (necessary_samples - chan.playback_vector.len[0]) * sizeof (Sample));
736 chan.current_playback_buffer = chan.playback_wrap_buffer;
741 if (rec_nframes == 0 && _actual_speed != 1.0f && _actual_speed != -1.0f) {
743 uint64_t phase = last_phase;
746 // Linearly interpolate into the alt buffer
747 // using 40.24 fixp maths (swh)
749 for (c = channels.begin(); c != channels.end(); ++c) {
752 ChannelInfo& chan (*c);
757 for (nframes_t outsample = 0; outsample < nframes; ++outsample) {
759 fr = (phase & 0xFFFFFF) / 16777216.0f;
760 chan.speed_buffer[outsample] =
761 chan.current_playback_buffer[i] * (1.0f - fr) +
762 chan.current_playback_buffer[i+1] * fr;
766 chan.current_playback_buffer = chan.speed_buffer;
769 playback_distance = i + 1;
770 last_phase = (phase & 0xFFFFFF);
773 playback_distance = nframes;
785 /* we're exiting with failure, so ::commit will not
786 be called. unlock the state lock.
796 AudioDiskstream::commit (nframes_t nframes)
798 bool need_butler = false;
800 if (_actual_speed < 0.0) {
801 playback_sample -= playback_distance;
803 playback_sample += playback_distance;
806 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
808 (*chan).playback_buf->increment_read_ptr (playback_distance);
810 if (adjust_capture_position) {
811 (*chan).capture_buf->increment_write_ptr (adjust_capture_position);
815 if (adjust_capture_position != 0) {
816 capture_captured += adjust_capture_position;
817 adjust_capture_position = 0;
821 need_butler = channels[0].playback_buf->write_space() >= channels[0].playback_buf->bufsize() / 2;
823 need_butler = channels[0].playback_buf->write_space() >= disk_io_chunk_frames
824 || channels[0].capture_buf->read_space() >= disk_io_chunk_frames;
835 AudioDiskstream::set_pending_overwrite (bool yn)
837 /* called from audio thread, so we can use the read ptr and playback sample as we wish */
839 pending_overwrite = yn;
841 overwrite_frame = playback_sample;
842 overwrite_offset = channels.front().playback_buf->get_read_ptr();
846 AudioDiskstream::overwrite_existing_buffers ()
848 Sample* mixdown_buffer;
851 bool reversed = (_visible_speed * _session.transport_speed()) < 0.0f;
853 overwrite_queued = false;
855 /* assume all are the same size */
856 nframes_t size = channels[0].playback_buf->bufsize();
858 mixdown_buffer = new Sample[size];
859 gain_buffer = new float[size];
861 /* reduce size so that we can fill the buffer correctly. */
867 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan, ++n) {
869 start = overwrite_frame;
870 nframes_t cnt = size;
872 /* to fill the buffer without resetting the playback sample, we need to
873 do it one or two chunks (normally two).
875 |----------------------------------------------------------------------|
879 |<- second chunk->||<----------------- first chunk ------------------>|
883 nframes_t to_read = size - overwrite_offset;
885 if (read ((*chan).playback_buf->buffer() + overwrite_offset, mixdown_buffer, gain_buffer, start, to_read, *chan, n, reversed)) {
886 error << string_compose(_("AudioDiskstream %1: when refilling, cannot read %2 from playlist at frame %3"),
887 _id, size, playback_sample) << endmsg;
895 if (read ((*chan).playback_buf->buffer(), mixdown_buffer, gain_buffer,
896 start, cnt, *chan, n, reversed)) {
897 error << string_compose(_("AudioDiskstream %1: when refilling, cannot read %2 from playlist at frame %3"),
898 _id, size, playback_sample) << endmsg;
907 pending_overwrite = false;
908 delete [] gain_buffer;
909 delete [] mixdown_buffer;
914 AudioDiskstream::seek (nframes_t frame, bool complete_refill)
916 Glib::Mutex::Lock lm (state_lock);
919 ChannelList::iterator chan;
921 for (n = 0, chan = channels.begin(); chan != channels.end(); ++chan, ++n) {
922 (*chan).playback_buf->reset ();
923 (*chan).capture_buf->reset ();
926 /* can't rec-enable in destructive mode if transport is before start */
928 if (destructive() && record_enabled() && frame < _session.current_start_frame()) {
929 disengage_record_enable ();
932 playback_sample = frame;
935 if (complete_refill) {
936 while ((ret = do_refill_with_alloc ()) > 0) ;
938 ret = do_refill_with_alloc ();
945 AudioDiskstream::can_internal_playback_seek (nframes_t distance)
947 ChannelList::iterator chan;
949 for (chan = channels.begin(); chan != channels.end(); ++chan) {
950 if ((*chan).playback_buf->read_space() < distance) {
958 AudioDiskstream::internal_playback_seek (nframes_t distance)
960 ChannelList::iterator chan;
962 for (chan = channels.begin(); chan != channels.end(); ++chan) {
963 (*chan).playback_buf->increment_read_ptr (distance);
966 first_recordable_frame += distance;
967 playback_sample += distance;
973 AudioDiskstream::read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer, nframes_t& start, nframes_t cnt,
974 ChannelInfo& channel_info, int channel, bool reversed)
976 nframes_t this_read = 0;
978 nframes_t loop_end = 0;
979 nframes_t loop_start = 0;
980 nframes_t loop_length = 0;
981 nframes_t offset = 0;
984 /* XXX we don't currently play loops in reverse. not sure why */
988 /* Make the use of a Location atomic for this read operation.
990 Note: Locations don't get deleted, so all we care about
991 when I say "atomic" is that we are always pointing to
992 the same one and using a start/length values obtained
996 if ((loc = loop_location) != 0) {
997 loop_start = loc->start();
998 loop_end = loc->end();
999 loop_length = loop_end - loop_start;
1002 /* if we are looping, ensure that the first frame we read is at the correct
1003 position within the loop.
1006 if (loc && start >= loop_end) {
1007 //cerr << "start adjusted from " << start;
1008 start = loop_start + ((start - loop_start) % loop_length);
1009 //cerr << "to " << start << endl;
1012 //cerr << "start is " << start << " loopstart: " << loop_start << " loopend: " << loop_end << endl;
1021 /* take any loop into account. we can't read past the end of the loop. */
1023 if (loc && (loop_end - start < cnt)) {
1024 this_read = loop_end - start;
1025 //cerr << "reloop true: thisread: " << this_read << " cnt: " << cnt << endl;
1032 if (this_read == 0) {
1036 this_read = min(cnt,this_read);
1038 if (audio_playlist()->read (buf+offset, mixdown_buffer, gain_buffer, start, this_read, channel) != this_read) {
1039 error << string_compose(_("AudioDiskstream %1: cannot read %2 from playlist at frame %3"), _id, this_read,
1044 _read_data_count = _playlist->read_data_count();
1048 swap_by_ptr (buf, buf + this_read - 1);
1052 /* if we read to the end of the loop, go back to the beginning */
1062 offset += this_read;
1069 AudioDiskstream::do_refill_with_alloc()
1071 Sample* mix_buf = new Sample[disk_io_chunk_frames];
1072 float* gain_buf = new float[disk_io_chunk_frames];
1074 int ret = _do_refill(mix_buf, gain_buf);
1083 AudioDiskstream::_do_refill (Sample* mixdown_buffer, float* gain_buffer)
1087 RingBufferNPT<Sample>::rw_vector vector;
1088 bool reversed = (_visible_speed * _session.transport_speed()) < 0.0f;
1089 nframes_t total_space;
1090 nframes_t zero_fill;
1092 ChannelList::iterator i;
1095 assert(mixdown_buffer);
1096 assert(gain_buffer);
1098 channels.front().playback_buf->get_write_vector (&vector);
1100 if ((total_space = vector.len[0] + vector.len[1]) == 0) {
1104 /* if there are 2+ chunks of disk i/o possible for
1105 this track, let the caller know so that it can arrange
1106 for us to be called again, ASAP.
1109 if (total_space >= (_slaved?3:2) * disk_io_chunk_frames) {
1113 /* if we're running close to normal speed and there isn't enough
1114 space to do disk_io_chunk_frames of I/O, then don't bother.
1116 at higher speeds, just do it because the sync between butler
1117 and audio thread may not be good enough.
1120 if ((total_space < disk_io_chunk_frames) && fabs (_actual_speed) < 2.0f) {
1124 /* when slaved, don't try to get too close to the read pointer. this
1125 leaves space for the buffer reversal to have something useful to
1129 if (_slaved && total_space < (channels.front().playback_buf->bufsize() / 2)) {
1133 /* never do more than disk_io_chunk_frames worth of disk input per call (limit doesn't apply for memset) */
1135 total_space = min (disk_io_chunk_frames, total_space);
1139 if (file_frame == 0) {
1141 /* at start: nothing to do but fill with silence */
1143 for (chan_n = 0, i = channels.begin(); i != channels.end(); ++i, ++chan_n) {
1145 ChannelInfo& chan (*i);
1146 chan.playback_buf->get_write_vector (&vector);
1147 memset (vector.buf[0], 0, sizeof(Sample) * vector.len[0]);
1148 if (vector.len[1]) {
1149 memset (vector.buf[1], 0, sizeof(Sample) * vector.len[1]);
1151 chan.playback_buf->increment_write_ptr (vector.len[0] + vector.len[1]);
1156 if (file_frame < total_space) {
1158 /* too close to the start: read what we can,
1159 and then zero fill the rest
1162 zero_fill = total_space - file_frame;
1163 total_space = file_frame;
1173 if (file_frame == max_frames) {
1175 /* at end: nothing to do but fill with silence */
1177 for (chan_n = 0, i = channels.begin(); i != channels.end(); ++i, ++chan_n) {
1179 ChannelInfo& chan (*i);
1180 chan.playback_buf->get_write_vector (&vector);
1181 memset (vector.buf[0], 0, sizeof(Sample) * vector.len[0]);
1182 if (vector.len[1]) {
1183 memset (vector.buf[1], 0, sizeof(Sample) * vector.len[1]);
1185 chan.playback_buf->increment_write_ptr (vector.len[0] + vector.len[1]);
1190 if (file_frame > max_frames - total_space) {
1192 /* to close to the end: read what we can, and zero fill the rest */
1194 zero_fill = total_space - (max_frames - file_frame);
1195 total_space = max_frames - file_frame;
1202 nframes_t file_frame_tmp = 0;
1204 for (chan_n = 0, i = channels.begin(); i != channels.end(); ++i, ++chan_n) {
1206 ChannelInfo& chan (*i);
1209 nframes_t len1, len2;
1211 chan.playback_buf->get_write_vector (&vector);
1213 if (vector.len[0] > disk_io_chunk_frames) {
1215 /* we're not going to fill the first chunk, so certainly do not bother with the
1216 other part. it won't be connected with the part we do fill, as in:
1218 .... => writable space
1219 ++++ => readable space
1220 ^^^^ => 1 x disk_io_chunk_frames that would be filled
1222 |......|+++++++++++++|...............................|
1227 So, just pretend that the buf1 part isn't there.
1237 file_frame_tmp = file_frame;
1239 buf1 = vector.buf[0];
1240 len1 = vector.len[0];
1241 buf2 = vector.buf[1];
1242 len2 = vector.len[1];
1244 to_read = min (ts, len1);
1245 to_read = min (to_read, disk_io_chunk_frames);
1249 if (read (buf1, mixdown_buffer, gain_buffer, file_frame_tmp, to_read, chan, chan_n, reversed)) {
1254 chan.playback_buf->increment_write_ptr (to_read);
1258 to_read = min (ts, len2);
1262 /* we read all of vector.len[0], but it wasn't an entire disk_io_chunk_frames of data,
1263 so read some or all of vector.len[1] as well.
1266 if (read (buf2, mixdown_buffer, gain_buffer, file_frame_tmp, to_read, chan, chan_n, reversed)) {
1271 chan.playback_buf->increment_write_ptr (to_read);
1280 file_frame = file_frame_tmp;
1287 /** Flush pending data to disk.
1289 * Important note: this function will write *AT MOST* disk_io_chunk_frames
1290 * of data to disk. it will never write more than that. If it writes that
1291 * much and there is more than that waiting to be written, it will return 1,
1292 * otherwise 0 on success or -1 on failure.
1294 * If there is less than disk_io_chunk_frames to be written, no data will be
1295 * written at all unless @a force_flush is true.
1298 AudioDiskstream::do_flush (Session::RunContext context, bool force_flush)
1302 RingBufferNPT<Sample>::rw_vector vector;
1303 RingBufferNPT<CaptureTransition>::rw_vector transvec;
1306 _write_data_count = 0;
1308 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1310 (*chan).capture_buf->get_read_vector (&vector);
1312 total = vector.len[0] + vector.len[1];
1315 if (total == 0 || (total < disk_io_chunk_frames && !force_flush && was_recording)) {
1319 /* if there are 2+ chunks of disk i/o possible for
1320 this track, let the caller know so that it can arrange
1321 for us to be called again, ASAP.
1323 if we are forcing a flush, then if there is* any* extra
1324 work, let the caller know.
1326 if we are no longer recording and there is any extra work,
1327 let the caller know too.
1330 if (total >= 2 * disk_io_chunk_frames || ((force_flush || !was_recording) && total > disk_io_chunk_frames)) {
1334 to_write = min (disk_io_chunk_frames, (nframes_t) vector.len[0]);
1336 // check the transition buffer when recording destructive
1337 // important that we get this after the capture buf
1339 if (destructive()) {
1340 (*chan).capture_transition_buf->get_read_vector(&transvec);
1341 size_t transcount = transvec.len[0] + transvec.len[1];
1342 bool have_start = false;
1345 for (ti=0; ti < transcount; ++ti) {
1346 CaptureTransition & captrans = (ti < transvec.len[0]) ? transvec.buf[0][ti] : transvec.buf[1][ti-transvec.len[0]];
1348 if (captrans.type == CaptureStart) {
1349 // by definition, the first data we got above represents the given capture pos
1351 (*chan).write_source->mark_capture_start (captrans.capture_val);
1352 (*chan).curr_capture_cnt = 0;
1356 else if (captrans.type == CaptureEnd) {
1358 // capture end, the capture_val represents total frames in capture
1360 if (captrans.capture_val <= (*chan).curr_capture_cnt + to_write) {
1362 // shorten to make the write a perfect fit
1363 uint32_t nto_write = (captrans.capture_val - (*chan).curr_capture_cnt);
1365 if (nto_write < to_write) {
1366 ret = 1; // should we?
1368 to_write = nto_write;
1370 (*chan).write_source->mark_capture_end ();
1372 // increment past this transition, but go no further
1377 // actually ends just beyond this chunk, so force more work
1385 (*chan).capture_transition_buf->increment_read_ptr(ti);
1389 if ((!(*chan).write_source) || (*chan).write_source->write (vector.buf[0], to_write) != to_write) {
1390 error << string_compose(_("AudioDiskstream %1: cannot write to disk"), _id) << endmsg;
1394 (*chan).capture_buf->increment_read_ptr (to_write);
1395 (*chan).curr_capture_cnt += to_write;
1397 if ((to_write == vector.len[0]) && (total > to_write) && (to_write < disk_io_chunk_frames) && !destructive()) {
1399 /* we wrote all of vector.len[0] but it wasn't an entire
1400 disk_io_chunk_frames of data, so arrange for some part
1401 of vector.len[1] to be flushed to disk as well.
1404 to_write = min ((nframes_t)(disk_io_chunk_frames - to_write), (nframes_t) vector.len[1]);
1406 if ((*chan).write_source->write (vector.buf[1], to_write) != to_write) {
1407 error << string_compose(_("AudioDiskstream %1: cannot write to disk"), _id) << endmsg;
1411 _write_data_count += (*chan).write_source->write_data_count();
1413 (*chan).capture_buf->increment_read_ptr (to_write);
1414 (*chan).curr_capture_cnt += to_write;
1423 AudioDiskstream::transport_stopped (struct tm& when, time_t twhen, bool abort_capture)
1425 uint32_t buffer_position;
1426 bool more_work = true;
1428 boost::shared_ptr<AudioRegion> region;
1429 nframes_t total_capture;
1431 SourceList::iterator src;
1432 ChannelList::iterator chan;
1433 vector<CaptureInfo*>::iterator ci;
1435 bool mark_write_completed = false;
1437 finish_capture (true);
1439 /* butler is already stopped, but there may be work to do
1440 to flush remaining data to disk.
1443 while (more_work && !err) {
1444 switch (do_flush (Session::TransportContext, true)) {
1451 error << string_compose(_("AudioDiskstream \"%1\": cannot flush captured data to disk!"), _name) << endmsg;
1456 /* XXX is there anything we can do if err != 0 ? */
1457 Glib::Mutex::Lock lm (capture_info_lock);
1459 if (capture_info.empty()) {
1463 if (abort_capture) {
1465 if (destructive()) {
1469 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1471 if ((*chan).write_source) {
1473 (*chan).write_source->mark_for_remove ();
1474 (*chan).write_source->drop_references ();
1475 (*chan).write_source.reset ();
1478 /* new source set up in "out" below */
1484 for (total_capture = 0, ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
1485 total_capture += (*ci)->frames;
1488 /* figure out the name for this take */
1490 for (n = 0, chan = channels.begin(); chan != channels.end(); ++chan, ++n) {
1492 boost::shared_ptr<AudioFileSource> s = (*chan).write_source;
1496 s->update_header (capture_info.front()->start, when, twhen);
1497 s->set_captured_for (_name);
1498 s->mark_immutable ();
1502 /* destructive tracks have a single, never changing region */
1504 if (destructive()) {
1506 /* send a signal that any UI can pick up to do the right thing. there is
1507 a small problem here in that a UI may need the peak data to be ready
1508 for the data that was recorded and this isn't interlocked with that
1509 process. this problem is deferred to the UI.
1512 _playlist->Modified();
1516 string whole_file_region_name;
1517 whole_file_region_name = region_name_from_path (channels[0].write_source->name(), true);
1519 /* Register a new region with the Session that
1520 describes the entire source. Do this first
1521 so that any sub-regions will obviously be
1522 children of this one (later!)
1526 boost::shared_ptr<Region> rx (RegionFactory::create (srcs, channels[0].write_source->last_capture_start_frame(), total_capture,
1527 whole_file_region_name,
1528 0, AudioRegion::Flag (AudioRegion::DefaultFlags|AudioRegion::Automatic|AudioRegion::WholeFile)));
1530 region = boost::dynamic_pointer_cast<AudioRegion> (rx);
1531 region->special_set_position (capture_info.front()->start);
1535 catch (failed_constructor& err) {
1536 error << string_compose(_("%1: could not create region for complete audio file"), _name) << endmsg;
1540 _last_capture_regions.push_back (region);
1542 // cerr << _name << ": there are " << capture_info.size() << " capture_info records\n";
1544 XMLNode &before = _playlist->get_state();
1545 _playlist->freeze ();
1547 for (buffer_position = channels[0].write_source->last_capture_start_frame(), ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
1551 _session.region_name (region_name, whole_file_region_name, false);
1553 // cerr << _name << ": based on ci of " << (*ci)->start << " for " << (*ci)->frames << " add region " << region_name << endl;
1556 boost::shared_ptr<Region> rx (RegionFactory::create (srcs, buffer_position, (*ci)->frames, region_name));
1557 region = boost::dynamic_pointer_cast<AudioRegion> (rx);
1560 catch (failed_constructor& err) {
1561 error << _("AudioDiskstream: could not create region for captured audio!") << endmsg;
1562 continue; /* XXX is this OK? */
1565 region->GoingAway.connect (bind (mem_fun (*this, &Diskstream::remove_region_from_last_capture), boost::weak_ptr<Region>(region)));
1567 _last_capture_regions.push_back (region);
1569 i_am_the_modifier++;
1570 _playlist->add_region (region, (*ci)->start);
1571 i_am_the_modifier--;
1573 buffer_position += (*ci)->frames;
1577 XMLNode &after = _playlist->get_state();
1578 _session.add_command (new MementoCommand<Playlist>(*_playlist, &before, &after));
1581 mark_write_completed = true;
1584 reset_write_sources (mark_write_completed);
1588 for (ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
1592 capture_info.clear ();
1593 capture_start_frame = 0;
1597 AudioDiskstream::finish_capture (bool rec_monitors_input)
1599 was_recording = false;
1601 if (capture_captured == 0) {
1605 if (recordable() && destructive()) {
1606 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1608 RingBufferNPT<CaptureTransition>::rw_vector transvec;
1609 (*chan).capture_transition_buf->get_write_vector(&transvec);
1612 if (transvec.len[0] > 0) {
1613 transvec.buf[0]->type = CaptureEnd;
1614 transvec.buf[0]->capture_val = capture_captured;
1615 (*chan).capture_transition_buf->increment_write_ptr(1);
1619 fatal << string_compose (_("programmer error: %1"), X_("capture_transition_buf is full when stopping record! inconceivable!")) << endmsg;
1625 CaptureInfo* ci = new CaptureInfo;
1627 ci->start = capture_start_frame;
1628 ci->frames = capture_captured;
1630 /* XXX theoretical race condition here. Need atomic exchange ?
1631 However, the circumstances when this is called right
1632 now (either on record-disable or transport_stopped)
1633 mean that no actual race exists. I think ...
1634 We now have a capture_info_lock, but it is only to be used
1635 to synchronize in the transport_stop and the capture info
1636 accessors, so that invalidation will not occur (both non-realtime).
1639 // cerr << "Finish capture, add new CI, " << ci->start << '+' << ci->frames << endl;
1641 capture_info.push_back (ci);
1642 capture_captured = 0;
1646 AudioDiskstream::set_record_enabled (bool yn)
1648 if (!recordable() || !_session.record_enabling_legal() || _io->n_inputs() == 0) {
1652 /* can't rec-enable in destructive mode if transport is before start */
1654 if (destructive() && yn && _session.transport_frame() < _session.current_start_frame()) {
1658 if (yn && channels[0].source == 0) {
1660 /* pick up connections not initiated *from* the IO object
1661 we're associated with.
1664 get_input_sources ();
1667 /* yes, i know that this not proof against race conditions, but its
1668 good enough. i think.
1671 if (record_enabled() != yn) {
1673 engage_record_enable ();
1675 disengage_record_enable ();
1681 AudioDiskstream::engage_record_enable ()
1683 bool rolling = _session.transport_speed() != 0.0f;
1685 g_atomic_int_set (&_record_enabled, 1);
1686 capturing_sources.clear ();
1687 if (Config->get_monitoring_model() == HardwareMonitoring) {
1688 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1689 if ((*chan).source) {
1690 (*chan).source->ensure_monitor_input (!(Config->get_auto_input() && rolling));
1692 capturing_sources.push_back ((*chan).write_source);
1695 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1696 capturing_sources.push_back ((*chan).write_source);
1700 RecordEnableChanged (); /* EMIT SIGNAL */
1704 AudioDiskstream::disengage_record_enable ()
1706 g_atomic_int_set (&_record_enabled, 0);
1707 if (Config->get_monitoring_model() == HardwareMonitoring) {
1708 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
1709 if ((*chan).source) {
1710 (*chan).source->ensure_monitor_input (false);
1714 capturing_sources.clear ();
1715 RecordEnableChanged (); /* EMIT SIGNAL */
1720 AudioDiskstream::get_state ()
1722 XMLNode* node = new XMLNode ("AudioDiskstream");
1724 LocaleGuard lg (X_("POSIX"));
1726 node->add_property ("flags", enum_2_string (_flags));
1728 snprintf (buf, sizeof(buf), "%zd", channels.size());
1729 node->add_property ("channels", buf);
1731 node->add_property ("playlist", _playlist->name());
1733 snprintf (buf, sizeof(buf), "%.12g", _visible_speed);
1734 node->add_property ("speed", buf);
1736 node->add_property("name", _name);
1737 id().print (buf, sizeof (buf));
1738 node->add_property("id", buf);
1740 if (!capturing_sources.empty() && _session.get_record_enabled()) {
1742 XMLNode* cs_child = new XMLNode (X_("CapturingSources"));
1743 XMLNode* cs_grandchild;
1745 for (vector<boost::shared_ptr<AudioFileSource> >::iterator i = capturing_sources.begin(); i != capturing_sources.end(); ++i) {
1746 cs_grandchild = new XMLNode (X_("file"));
1747 cs_grandchild->add_property (X_("path"), (*i)->path());
1748 cs_child->add_child_nocopy (*cs_grandchild);
1751 /* store the location where capture will start */
1755 if (Config->get_punch_in() && ((pi = _session.locations()->auto_punch_location()) != 0)) {
1756 snprintf (buf, sizeof (buf), "%" PRIu32, pi->start());
1758 snprintf (buf, sizeof (buf), "%" PRIu32, _session.transport_frame());
1761 cs_child->add_property (X_("at"), buf);
1762 node->add_child_nocopy (*cs_child);
1766 node->add_child_copy (*_extra_xml);
1773 AudioDiskstream::set_state (const XMLNode& node)
1775 const XMLProperty* prop;
1776 XMLNodeList nlist = node.children();
1777 XMLNodeIterator niter;
1778 uint32_t nchans = 1;
1779 XMLNode* capture_pending_node = 0;
1780 LocaleGuard lg (X_("POSIX"));
1782 in_set_state = true;
1784 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1785 if ((*niter)->name() == IO::state_node_name) {
1786 deprecated_io_node = new XMLNode (**niter);
1789 if ((*niter)->name() == X_("CapturingSources")) {
1790 capture_pending_node = *niter;
1794 /* prevent write sources from being created */
1796 in_set_state = true;
1798 if ((prop = node.property ("name")) != 0) {
1799 _name = prop->value();
1802 if (deprecated_io_node) {
1803 if ((prop = deprecated_io_node->property ("id")) != 0) {
1804 _id = prop->value ();
1807 if ((prop = node.property ("id")) != 0) {
1808 _id = prop->value ();
1812 if ((prop = node.property ("flags")) != 0) {
1813 _flags = Flag (string_2_enum (prop->value(), _flags));
1816 if ((prop = node.property ("channels")) != 0) {
1817 nchans = atoi (prop->value().c_str());
1820 // create necessary extra channels
1821 // we are always constructed with one and we always need one
1823 if (nchans > _n_channels) {
1825 // we need to add new channel infos
1826 //LockMonitor lm (state_lock, __LINE__, __FILE__);
1828 int diff = nchans - channels.size();
1830 for (int i=0; i < diff; ++i) {
1834 } else if (nchans < _n_channels) {
1836 // we need to get rid of channels
1837 //LockMonitor lm (state_lock, __LINE__, __FILE__);
1839 int diff = channels.size() - nchans;
1841 for (int i = 0; i < diff; ++i) {
1846 if ((prop = node.property ("playlist")) == 0) {
1851 bool had_playlist = (_playlist != 0);
1853 if (find_and_use_playlist (prop->value())) {
1857 if (!had_playlist) {
1858 _playlist->set_orig_diskstream_id (_id);
1861 if (!destructive() && capture_pending_node) {
1862 /* destructive streams have one and only one source per channel,
1863 and so they never end up in pending capture in any useful
1866 use_pending_capture_data (*capture_pending_node);
1871 if ((prop = node.property ("speed")) != 0) {
1872 double sp = atof (prop->value().c_str());
1874 if (realtime_set_speed (sp, false)) {
1875 non_realtime_set_speed ();
1879 _n_channels = channels.size();
1881 in_set_state = false;
1883 /* make sure this is clear before we do anything else */
1885 capturing_sources.clear ();
1887 /* write sources are handled when we handle the input set
1888 up of the IO that owns this DS (::non_realtime_input_change())
1891 in_set_state = false;
1897 AudioDiskstream::use_new_write_source (uint32_t n)
1899 if (!recordable()) {
1903 if (n >= channels.size()) {
1904 error << string_compose (_("AudioDiskstream: channel %1 out of range"), n) << endmsg;
1908 ChannelInfo &chan = channels[n];
1910 if (chan.write_source) {
1911 chan.write_source->set_allow_remove_if_empty (true);
1912 chan.write_source.reset ();
1916 if ((chan.write_source = _session.create_audio_source_for_session (*this, n, destructive())) == 0) {
1917 throw failed_constructor();
1921 catch (failed_constructor &err) {
1922 error << string_compose (_("%1:%2 new capture file not initialized correctly"), _name, n) << endmsg;
1923 chan.write_source.reset ();
1927 /* do not remove destructive files even if they are empty */
1929 chan.write_source->set_allow_remove_if_empty (!destructive());
1935 AudioDiskstream::reset_write_sources (bool mark_write_complete, bool force)
1937 ChannelList::iterator chan;
1940 if (!recordable()) {
1944 capturing_sources.clear ();
1946 for (chan = channels.begin(), n = 0; chan != channels.end(); ++chan, ++n) {
1947 if (!destructive()) {
1949 if ((*chan).write_source && mark_write_complete) {
1950 (*chan).write_source->mark_streaming_write_completed ();
1952 use_new_write_source (n);
1954 if (record_enabled()) {
1955 capturing_sources.push_back ((*chan).write_source);
1959 if ((*chan).write_source == 0) {
1960 use_new_write_source (n);
1965 if (destructive()) {
1967 /* we now have all our write sources set up, so create the
1968 playlist's single region.
1971 if (_playlist->empty()) {
1972 setup_destructive_playlist ();
1978 AudioDiskstream::rename_write_sources ()
1980 ChannelList::iterator chan;
1983 for (chan = channels.begin(), n = 0; chan != channels.end(); ++chan, ++n) {
1984 if ((*chan).write_source != 0) {
1985 (*chan).write_source->set_name (_name, destructive());
1986 /* XXX what to do if one of them fails ? */
1994 AudioDiskstream::set_block_size (nframes_t nframes)
1996 if (_session.get_block_size() > speed_buffer_size) {
1997 speed_buffer_size = _session.get_block_size();
1999 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
2000 if ((*chan).speed_buffer) delete [] (*chan).speed_buffer;
2001 (*chan).speed_buffer = new Sample[speed_buffer_size];
2004 allocate_temporary_buffers ();
2008 AudioDiskstream::allocate_temporary_buffers ()
2010 /* make sure the wrap buffer is at least large enough to deal
2011 with the speeds up to 1.2, to allow for micro-variation
2012 when slaving to MTC, SMPTE etc.
2015 double sp = max (fabsf (_actual_speed), 1.2f);
2016 nframes_t required_wrap_size = (nframes_t) floor (_session.get_block_size() * sp) + 1;
2018 if (required_wrap_size > wrap_buffer_size) {
2020 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
2021 if ((*chan).playback_wrap_buffer) delete [] (*chan).playback_wrap_buffer;
2022 (*chan).playback_wrap_buffer = new Sample[required_wrap_size];
2023 if ((*chan).capture_wrap_buffer) delete [] (*chan).capture_wrap_buffer;
2024 (*chan).capture_wrap_buffer = new Sample[required_wrap_size];
2027 wrap_buffer_size = required_wrap_size;
2032 AudioDiskstream::monitor_input (bool yn)
2034 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
2036 if ((*chan).source) {
2037 (*chan).source->ensure_monitor_input (yn);
2043 AudioDiskstream::set_align_style_from_io ()
2045 bool have_physical = false;
2051 get_input_sources ();
2053 for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
2054 if ((*chan).source && (*chan).source->flags() & JackPortIsPhysical) {
2055 have_physical = true;
2060 if (have_physical) {
2061 set_align_style (ExistingMaterial);
2063 set_align_style (CaptureTime);
2068 AudioDiskstream::add_channel ()
2070 /* XXX need to take lock??? */
2072 /* this copies the ChannelInfo, which currently has no buffers. kind
2073 of pointless really, but we want the channels list to contain
2074 actual objects, not pointers to objects. mostly for convenience,
2075 which isn't much in evidence.
2078 channels.push_back (ChannelInfo());
2080 /* now allocate the buffers */
2082 channels.back().init (_session.diskstream_buffer_size(),
2086 _n_channels = channels.size();
2092 AudioDiskstream::remove_channel ()
2094 if (channels.size() > 1) {
2095 /* XXX need to take lock??? */
2096 channels.back().release ();
2097 channels.pop_back();
2098 _n_channels = channels.size();
2106 AudioDiskstream::playback_buffer_load () const
2108 return (float) ((double) channels.front().playback_buf->read_space()/
2109 (double) channels.front().playback_buf->bufsize());
2113 AudioDiskstream::capture_buffer_load () const
2115 return (float) ((double) channels.front().capture_buf->write_space()/
2116 (double) channels.front().capture_buf->bufsize());
2120 AudioDiskstream::use_pending_capture_data (XMLNode& node)
2122 const XMLProperty* prop;
2123 XMLNodeList nlist = node.children();
2124 XMLNodeIterator niter;
2125 boost::shared_ptr<AudioFileSource> fs;
2126 boost::shared_ptr<AudioFileSource> first_fs;
2127 SourceList pending_sources;
2130 if ((prop = node.property (X_("at"))) == 0) {
2134 if (sscanf (prop->value().c_str(), "%" PRIu32, &position) != 1) {
2138 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
2139 if ((*niter)->name() == X_("file")) {
2141 if ((prop = (*niter)->property (X_("path"))) == 0) {
2146 fs = boost::dynamic_pointer_cast<AudioFileSource> (SourceFactory::createWritable (_session, prop->value(), false, _session.frame_rate()));
2149 catch (failed_constructor& err) {
2150 error << string_compose (_("%1: cannot restore pending capture source file %2"),
2151 _name, prop->value())
2156 pending_sources.push_back (fs);
2158 if (first_fs == 0) {
2162 fs->set_captured_for (_name);
2166 if (pending_sources.size() == 0) {
2167 /* nothing can be done */
2171 if (pending_sources.size() != _n_channels) {
2172 error << string_compose (_("%1: incorrect number of pending sources listed - ignoring them all"), _name)
2177 boost::shared_ptr<AudioRegion> region;
2180 region = boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (pending_sources, 0, first_fs->length(),
2181 region_name_from_path (first_fs->name(), true),
2182 0, AudioRegion::Flag (AudioRegion::DefaultFlags|AudioRegion::Automatic|AudioRegion::WholeFile)));
2183 region->special_set_position (0);
2186 catch (failed_constructor& err) {
2187 error << string_compose (_("%1: cannot create whole-file region from pending capture sources"),
2195 region = boost::dynamic_pointer_cast<AudioRegion> (RegionFactory::create (pending_sources, 0, first_fs->length(), region_name_from_path (first_fs->name(), true)));
2198 catch (failed_constructor& err) {
2199 error << string_compose (_("%1: cannot create region from pending capture sources"),
2206 _playlist->add_region (region, position);
2212 AudioDiskstream::set_destructive (bool yn)
2214 bool bounce_ignored;
2216 if (yn != destructive()) {
2219 /* requestor should already have checked this and
2220 bounced if necessary and desired
2222 if (!can_become_destructive (bounce_ignored)) {
2225 _flags = Flag (_flags | Destructive);
2226 use_destructive_playlist ();
2228 _flags = Flag (_flags & ~Destructive);
2229 reset_write_sources (true, true);
2237 AudioDiskstream::can_become_destructive (bool& requires_bounce) const
2240 requires_bounce = false;
2244 /* is there only one region ? */
2246 if (_playlist->n_regions() != 1) {
2247 requires_bounce = true;
2251 boost::shared_ptr<Region> first = _playlist->find_next_region (_session.current_start_frame(), Start, 1);
2254 /* do the source(s) for the region cover the session start position ? */
2256 if (first->position() != _session.current_start_frame()) {
2257 if (first->start() > _session.current_start_frame()) {
2258 requires_bounce = true;
2263 /* is the source used by only 1 playlist ? */
2265 boost::shared_ptr<AudioRegion> afirst = boost::dynamic_pointer_cast<AudioRegion> (first);
2269 if (afirst->source()->used() > 1) {
2270 requires_bounce = true;
2274 requires_bounce = false;
2278 AudioDiskstream::ChannelInfo::ChannelInfo ()
2280 playback_wrap_buffer = 0;
2281 capture_wrap_buffer = 0;
2285 current_capture_buffer = 0;
2286 current_playback_buffer = 0;
2287 curr_capture_cnt = 0;
2290 capture_transition_buf = 0;
2294 AudioDiskstream::ChannelInfo::init (nframes_t bufsize, nframes_t speed_size, nframes_t wrap_size)
2296 speed_buffer = new Sample[speed_size];
2297 playback_wrap_buffer = new Sample[wrap_size];
2298 capture_wrap_buffer = new Sample[wrap_size];
2300 playback_buf = new RingBufferNPT<Sample> (bufsize);
2301 capture_buf = new RingBufferNPT<Sample> (bufsize);
2302 capture_transition_buf = new RingBufferNPT<CaptureTransition> (128);
2304 /* touch the ringbuffer buffers, which will cause
2305 them to be mapped into locked physical RAM if
2306 we're running with mlockall(). this doesn't do
2310 memset (playback_buf->buffer(), 0, sizeof (Sample) * playback_buf->bufsize());
2311 memset (capture_buf->buffer(), 0, sizeof (Sample) * capture_buf->bufsize());
2312 memset (capture_transition_buf->buffer(), 0, sizeof (CaptureTransition) * capture_transition_buf->bufsize());
2315 AudioDiskstream::ChannelInfo::~ChannelInfo ()
2320 AudioDiskstream::ChannelInfo::release ()
2323 write_source.reset ();
2327 delete [] speed_buffer;
2331 if (playback_wrap_buffer) {
2332 delete [] playback_wrap_buffer;
2333 playback_wrap_buffer = 0;
2336 if (capture_wrap_buffer) {
2337 delete [] capture_wrap_buffer;
2338 capture_wrap_buffer = 0;
2342 delete playback_buf;
2351 if (capture_transition_buf) {
2352 delete capture_transition_buf;
2353 capture_transition_buf = 0;