2 Copyright (C) 2009-2016 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.
20 #include "pbd/enumwriter.h"
22 #include "pbd/memento_command.h"
24 #include "ardour/audioengine.h"
25 #include "ardour/audioplaylist.h"
26 #include "ardour/audio_buffer.h"
27 #include "ardour/butler.h"
28 #include "ardour/debug.h"
29 #include "ardour/disk_reader.h"
30 #include "ardour/midi_ring_buffer.h"
31 #include "ardour/midi_playlist.h"
32 #include "ardour/pannable.h"
33 #include "ardour/playlist.h"
34 #include "ardour/playlist_factory.h"
35 #include "ardour/session.h"
36 #include "ardour/session_playlists.h"
38 using namespace ARDOUR;
42 ARDOUR::framecnt_t DiskReader::_chunk_frames = default_chunk_frames ();
43 PBD::Signal0<void> DiskReader::Underrun;
44 Sample* DiskReader::_mixdown_buffer = 0;
45 gain_t* DiskReader::_gain_buffer = 0;
46 framecnt_t DiskReader::midi_readahead = 4096;
48 DiskReader::DiskReader (Session& s, string const & str, DiskIOProcessor::Flag f)
49 : DiskIOProcessor (s, str, f)
52 , overwrite_offset (0)
53 , _pending_overwrite (false)
54 , overwrite_queued (false)
55 , _gui_feed_buffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI))
59 DiskReader::~DiskReader ()
61 DEBUG_TRACE (DEBUG::Destruction, string_compose ("DiskReader %1 deleted\n", _name));
63 for (uint32_t n = 0; n < DataType::num_types; ++n) {
65 _playlists[n]->release ();
70 RCUWriter<ChannelList> writer (channels);
71 boost::shared_ptr<ChannelList> c = writer.get_copy();
73 for (ChannelList::iterator chan = c->begin(); chan != c->end(); ++chan) {
86 DiskReader::allocate_working_buffers()
88 /* with varifill buffer refilling, we compute the read size in bytes (to optimize
89 for disk i/o bandwidth) and then convert back into samples. These buffers
90 need to reflect the maximum size we could use, which is 4MB reads, or 2M samples
93 _mixdown_buffer = new Sample[2*1048576];
94 _gain_buffer = new gain_t[2*1048576];
98 DiskReader::free_working_buffers()
100 delete [] _mixdown_buffer;
101 delete [] _gain_buffer;
107 DiskReader::default_chunk_frames()
113 DiskReader::set_name (string const & str)
115 string my_name = X_("reader:");
118 if (_name != my_name) {
119 SessionObject::set_name (my_name);
126 DiskReader::set_roll_delay (ARDOUR::framecnt_t nframes)
128 _roll_delay = nframes;
132 DiskReader::state (bool full)
134 XMLNode& node (DiskIOProcessor::state (full));
135 node.set_property(X_("type"), X_("diskreader"));
140 DiskReader::set_state (const XMLNode& node, int version)
142 if (DiskIOProcessor::set_state (node, version)) {
150 DiskReader::realtime_handle_transport_stopped ()
152 realtime_speed_change ();
156 DiskReader::realtime_locate ()
161 DiskReader::buffer_load () const
163 /* Note: for MIDI it's not trivial to differentiate the following two cases:
165 1. The playback buffer is empty because the system has run out of time to fill it.
166 2. The playback buffer is empty because there is no more data on the playlist.
168 If we use a simple buffer load computation, we will report that the MIDI diskstream
169 cannot keep up when #2 happens, when in fact it can. Since MIDI data rates
170 are so low compared to audio, just use the audio value here.
173 boost::shared_ptr<ChannelList> c = channels.reader();
176 /* no channels, so no buffers, so completely full and ready to playback, sir! */
180 PBD::RingBufferNPT<Sample> * b = c->front()->buf;
181 return (float) ((double) b->read_space() / (double) b->bufsize());
185 DiskReader::adjust_buffering ()
187 boost::shared_ptr<ChannelList> c = channels.reader();
189 for (ChannelList::iterator chan = c->begin(); chan != c->end(); ++chan) {
190 (*chan)->resize (_session.butler()->audio_diskstream_playback_buffer_size());
195 DiskReader::playlist_changed (const PropertyChange&)
197 playlist_modified ();
201 DiskReader::playlist_modified ()
203 if (!i_am_the_modifier && !overwrite_queued) {
204 _session.request_overwrite_buffer (_route);
205 overwrite_queued = true;
210 DiskReader::use_playlist (DataType dt, boost::shared_ptr<Playlist> playlist)
212 bool prior_playlist = false;
214 if (_playlists[dt]) {
215 prior_playlist = true;
218 if (DiskIOProcessor::use_playlist (dt, playlist)) {
222 /* don't do this if we've already asked for it *or* if we are setting up
223 the diskstream for the very first time - the input changed handling will
224 take care of the buffer refill.
227 if (!overwrite_queued && (prior_playlist || _session.loading())) {
228 _session.request_overwrite_buffer (_route);
229 overwrite_queued = true;
236 DiskReader::run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame,
237 double speed, pframes_t nframes, bool result_required)
240 boost::shared_ptr<ChannelList> c = channels.reader();
241 ChannelList::iterator chan;
242 frameoffset_t playback_distance = nframes;
243 MonitorState ms = _route->monitoring_state ();
246 if (!_pending_active) {
251 if (_pending_active) {
258 _need_butler = false;
260 if (speed != 1.0f && speed != -1.0f) {
261 interpolation.set_speed (speed);
262 midi_interpolation.set_speed (speed);
263 playback_distance = midi_interpolation.distance (nframes);
267 playback_distance = -playback_distance;
270 BufferSet& scratch_bufs (_session.get_scratch_buffers (bufs.count()));
272 if (!result_required || ((ms & MonitoringDisk) == 0)) {
274 /* no need for actual disk data, just advance read pointer and return */
276 for (ChannelList::iterator chan = c->begin(); chan != c->end(); ++chan) {
277 (*chan)->buf->increment_read_ptr (playback_distance);
282 /* we need audio data from disk */
284 size_t n_buffers = bufs.count().n_audio();
285 size_t n_chans = c->size();
288 if (n_chans > n_buffers) {
289 scaling = ((float) n_buffers)/n_chans;
294 for (n = 0, chan = c->begin(); chan != c->end(); ++chan, ++n) {
296 ChannelInfo* chaninfo (*chan);
297 AudioBuffer& buf (bufs.get_audio (n%n_buffers));
298 Sample* outgoing = 0; /* assignment not really needed but it keeps the compiler quiet and helps track bugs */
300 if (ms & MonitoringInput) {
301 /* put disk stream in scratch buffer, blend at end */
302 outgoing = scratch_bufs.get_audio(n).data ();
304 /* no input stream needed, just overwrite buffers */
305 outgoing = buf.data ();
308 chaninfo->buf->get_read_vector (&(*chan)->rw_vector);
310 if (playback_distance <= (framecnt_t) chaninfo->rw_vector.len[0]) {
312 if (fabsf (speed) != 1.0f) {
313 (void) interpolation.interpolate (
315 chaninfo->rw_vector.buf[0],
318 memcpy (outgoing, chaninfo->rw_vector.buf[0], sizeof (Sample) * playback_distance);
323 const framecnt_t total = chaninfo->rw_vector.len[0] + chaninfo->rw_vector.len[1];
325 if (playback_distance <= total) {
327 /* We have enough samples, but not in one lump.
330 if (fabsf (speed) != 1.0f) {
331 interpolation.interpolate (n, chaninfo->rw_vector.len[0],
332 chaninfo->rw_vector.buf[0],
334 outgoing += chaninfo->rw_vector.len[0];
335 interpolation.interpolate (n, playback_distance - chaninfo->rw_vector.len[0],
336 chaninfo->rw_vector.buf[1],
340 chaninfo->rw_vector.buf[0],
341 chaninfo->rw_vector.len[0] * sizeof (Sample));
342 outgoing += chaninfo->rw_vector.len[0];
344 chaninfo->rw_vector.buf[1],
345 (playback_distance - chaninfo->rw_vector.len[0]) * sizeof (Sample));
350 cerr << _name << " Need " << playback_distance << " total = " << total << endl;
351 cerr << "underrun for " << _name << endl;
352 DEBUG_TRACE (DEBUG::Butler, string_compose ("%1 underrun in %2, total space = %3\n",
353 DEBUG_THREAD_SELF, name(), total));
360 if (scaling != 1.0f) {
361 apply_gain_to_buffer (outgoing, nframes, scaling);
364 chaninfo->buf->increment_read_ptr (playback_distance);
366 if (ms & MonitoringInput) {
367 /* mix the disk signal into the input signal (already in bufs) */
368 mix_buffers_no_gain (buf.data(), outgoing, speed == 0.0 ? nframes : playback_distance);
373 /* MIDI data handling */
375 if (!_session.declick_out_pending()) {
376 if (ms & MonitoringDisk) {
377 MidiBuffer& mbuf (bufs.get_midi (0));
378 get_playback (mbuf, playback_distance, ms, scratch_bufs, speed, playback_distance);
383 playback_sample -= playback_distance;
385 playback_sample += playback_distance;
388 if (_playlists[DataType::AUDIO]) {
391 if (c->front()->buf->write_space() >= c->front()->buf->bufsize() / 2) {
392 DEBUG_TRACE (DEBUG::Butler, string_compose ("%1: slaved, write space = %2 of %3\n", name(), c->front()->buf->write_space(),
393 c->front()->buf->bufsize()));
397 if ((framecnt_t) c->front()->buf->write_space() >= _chunk_frames) {
398 DEBUG_TRACE (DEBUG::Butler, string_compose ("%1: write space = %2 of %3\n", name(), c->front()->buf->write_space(),
406 if (_playlists[DataType::MIDI]) {
407 /* MIDI butler needed part */
409 uint32_t frames_read = g_atomic_int_get(const_cast<gint*>(&_frames_read_from_ringbuffer));
410 uint32_t frames_written = g_atomic_int_get(const_cast<gint*>(&_frames_written_to_ringbuffer));
413 cerr << name() << " MDS written: " << frames_written << " - read: " << frames_read <<
414 " = " << frames_written - frames_read
415 << " + " << playback_distance << " < " << midi_readahead << " = " << need_butler << ")" << endl;
418 /* frames_read will generally be less than frames_written, but
419 * immediately after an overwrite, we can end up having read some data
420 * before we've written any. we don't need to trip an assert() on this,
421 * but we do need to check so that the decision on whether or not we
422 * need the butler is done correctly.
427 * Doing heavy GUI operations[1] can stall also the butler.
428 * The RT-thread meanwhile will happily continue and
429 * ‘frames_read’ (from buffer to output) will become larger
430 * than ‘frames_written’ (from disk to buffer).
432 * The disk-stream is now behind..
434 * In those cases the butler needs to be summed to refill the buffer (done now)
435 * AND we need to skip (frames_read - frames_written). ie remove old events
436 * before playback_sample from the rinbuffer.
438 * [1] one way to do so is described at #6170.
439 * For me just popping up the context-menu on a MIDI-track header
440 * of a track with a large (think beethoven :) midi-region also did the
441 * trick. The playhead stalls for 2 or 3 sec, until the context-menu shows.
443 * In both cases the root cause is that redrawing MIDI regions on the GUI is still very slow
446 if (frames_read <= frames_written) {
447 if ((frames_written - frames_read) + playback_distance < midi_readahead) {
456 DEBUG_TRACE (DEBUG::Butler, string_compose ("%1 reader run, needs butler = %2\n", name(), _need_butler));
460 DiskReader::set_pending_overwrite (bool yn)
462 /* called from audio thread, so we can use the read ptr and playback sample as we wish */
464 _pending_overwrite = yn;
466 overwrite_frame = playback_sample;
468 boost::shared_ptr<ChannelList> c = channels.reader ();
470 overwrite_offset = c->front()->buf->get_read_ptr();
475 DiskReader::overwrite_existing_buffers ()
479 boost::shared_ptr<ChannelList> c = channels.reader();
481 overwrite_queued = false;
483 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("%1 overwriting existing buffers at %2\n", overwrite_frame));
489 const bool reversed = _session.transport_speed() < 0.0f;
491 /* assume all are the same size */
492 framecnt_t size = c->front()->buf->bufsize();
494 std::auto_ptr<Sample> mixdown_buffer (new Sample[size]);
495 std::auto_ptr<float> gain_buffer (new float[size]);
497 /* reduce size so that we can fill the buffer correctly (ringbuffers
498 can only handle size-1, otherwise they appear to be empty)
505 for (ChannelList::iterator chan = c->begin(); chan != c->end(); ++chan, ++n) {
507 start = overwrite_frame;
508 framecnt_t cnt = size;
510 /* to fill the buffer without resetting the playback sample, we need to
511 do it one or two chunks (normally two).
513 |----------------------------------------------------------------------|
517 |<- second chunk->||<----------------- first chunk ------------------>|
521 framecnt_t to_read = size - overwrite_offset;
523 if (audio_read ((*chan)->buf->buffer() + overwrite_offset, mixdown_buffer.get(), gain_buffer.get(), start, to_read, n, reversed)) {
524 error << string_compose(_("DiskReader %1: when refilling, cannot read %2 from playlist at frame %3"),
525 id(), size, playback_sample) << endmsg;
533 if (audio_read ((*chan)->buf->buffer(), mixdown_buffer.get(), gain_buffer.get(), start, cnt, n, reversed)) {
534 error << string_compose(_("DiskReader %1: when refilling, cannot read %2 from playlist at frame %3"),
535 id(), size, playback_sample) << endmsg;
547 if (_midi_buf && _playlists[DataType::MIDI]) {
549 /* Clear the playback buffer contents. This is safe as long as the butler
550 thread is suspended, which it should be.
553 _midi_buf->reset_tracker ();
555 g_atomic_int_set (&_frames_read_from_ringbuffer, 0);
556 g_atomic_int_set (&_frames_written_to_ringbuffer, 0);
558 /* Resolve all currently active notes in the playlist. This is more
559 aggressive than it needs to be: ideally we would only resolve what is
560 absolutely necessary, but this seems difficult and/or impossible without
561 having the old data or knowing what change caused the overwrite.
563 midi_playlist()->resolve_note_trackers (*_midi_buf, overwrite_frame);
565 midi_read (overwrite_frame, _chunk_frames, false);
567 file_frame = overwrite_frame; // it was adjusted by ::midi_read()
570 _pending_overwrite = false;
576 DiskReader::seek (framepos_t frame, bool complete_refill)
580 ChannelList::iterator chan;
581 boost::shared_ptr<ChannelList> c = channels.reader();
583 for (n = 0, chan = c->begin(); chan != c->end(); ++chan, ++n) {
584 (*chan)->buf->reset ();
587 if (g_atomic_int_get (&_frames_read_from_ringbuffer) == 0) {
588 /* we haven't read anything since the last seek,
589 so flush all note trackers to prevent
596 g_atomic_int_set(&_frames_read_from_ringbuffer, 0);
597 g_atomic_int_set(&_frames_written_to_ringbuffer, 0);
599 playback_sample = frame;
602 if (complete_refill) {
603 /* call _do_refill() to refill the entire buffer, using
604 the largest reads possible.
606 while ((ret = do_refill_with_alloc (false)) > 0) ;
608 /* call _do_refill() to refill just one chunk, and then
611 ret = do_refill_with_alloc (true);
619 DiskReader::can_internal_playback_seek (framecnt_t distance)
623 ChannelList::iterator chan;
624 boost::shared_ptr<ChannelList> c = channels.reader();
626 for (chan = c->begin(); chan != c->end(); ++chan) {
627 if ((*chan)->buf->read_space() < (size_t) distance) {
634 uint32_t frames_read = g_atomic_int_get(&_frames_read_from_ringbuffer);
635 uint32_t frames_written = g_atomic_int_get(&_frames_written_to_ringbuffer);
637 return ((frames_written - frames_read) < distance);
641 DiskReader::internal_playback_seek (framecnt_t distance)
643 ChannelList::iterator chan;
644 boost::shared_ptr<ChannelList> c = channels.reader();
646 for (chan = c->begin(); chan != c->end(); ++chan) {
647 (*chan)->buf->increment_read_ptr (::llabs(distance));
650 playback_sample += distance;
656 void swap_by_ptr (Sample *first, Sample *last)
658 while (first < last) {
665 /** Read some data for 1 channel from our playlist into a buffer.
666 * @param buf Buffer to write to.
667 * @param start Session frame to start reading from; updated to where we end up
669 * @param cnt Count of samples to read.
670 * @param reversed true if we are running backwards, otherwise false.
673 DiskReader::audio_read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
674 framepos_t& start, framecnt_t cnt,
675 int channel, bool reversed)
677 framecnt_t this_read = 0;
679 framepos_t loop_end = 0;
680 framepos_t loop_start = 0;
681 framecnt_t offset = 0;
684 if (!_playlists[DataType::AUDIO]) {
685 memset (buf, 0, sizeof (Sample) * cnt);
689 /* XXX we don't currently play loops in reverse. not sure why */
693 framecnt_t loop_length = 0;
695 /* Make the use of a Location atomic for this read operation.
697 Note: Locations don't get deleted, so all we care about
698 when I say "atomic" is that we are always pointing to
699 the same one and using a start/length values obtained
703 if ((loc = loop_location) != 0) {
704 loop_start = loc->start();
705 loop_end = loc->end();
706 loop_length = loop_end - loop_start;
709 /* if we are looping, ensure that the first frame we read is at the correct
710 position within the loop.
713 if (loc && start >= loop_end) {
714 start = loop_start + ((start - loop_start) % loop_length);
723 /* We need this while loop in case we hit a loop boundary, in which case our read from
724 the playlist must be split into more than one section.
729 /* take any loop into account. we can't read past the end of the loop. */
731 if (loc && (loop_end - start < cnt)) {
732 this_read = loop_end - start;
739 if (this_read == 0) {
743 this_read = min(cnt,this_read);
745 if (audio_playlist()->read (buf+offset, mixdown_buffer, gain_buffer, start, this_read, channel) != this_read) {
746 error << string_compose(_("DiskReader %1: cannot read %2 from playlist at frame %3"), id(), this_read,
753 swap_by_ptr (buf, buf + this_read - 1);
757 /* if we read to the end of the loop, go back to the beginning */
774 DiskReader::_do_refill_with_alloc (bool partial_fill)
776 /* We limit disk reads to at most 4MB chunks, which with floating point
777 samples would be 1M samples. But we might use 16 or 14 bit samples,
778 in which case 4MB is more samples than that. Therefore size this for
779 the smallest sample value .. 4MB = 2M samples (16 bit).
783 std::auto_ptr<Sample> mix_buf (new Sample[2*1048576]);
784 std::auto_ptr<float> gain_buf (new float[2*1048576]);
786 int ret = refill_audio (mix_buf.get(), gain_buf.get(), (partial_fill ? _chunk_frames : 0));
793 return refill_midi ();
797 DiskReader::refill (Sample* mixdown_buffer, float* gain_buffer, framecnt_t fill_level)
799 int ret = refill_audio (mixdown_buffer, gain_buffer, fill_level);
805 return refill_midi ();
809 /** Get some more data from disk and put it in our channels' bufs,
810 * if there is suitable space in them.
812 * If fill_level is non-zero, then we will refill the buffer so that there is
813 * still at least fill_level samples of space left to be filled. This is used
814 * after locates so that we do not need to wait to fill the entire buffer.
819 DiskReader::refill_audio (Sample* mixdown_buffer, float* gain_buffer, framecnt_t fill_level)
821 /* do not read from disk while session is marked as Loading, to avoid
822 useless redundant I/O.
825 if (_session.loading()) {
831 RingBufferNPT<Sample>::rw_vector vector;
832 bool const reversed = _session.transport_speed() < 0.0f;
833 framecnt_t total_space;
834 framecnt_t zero_fill;
836 ChannelList::iterator i;
837 boost::shared_ptr<ChannelList> c = channels.reader();
844 assert(mixdown_buffer);
852 c->front()->buf->get_write_vector (&vector);
854 if ((total_space = vector.len[0] + vector.len[1]) == 0) {
855 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("%1: no space to refill\n", name()));
856 /* nowhere to write to */
861 if (fill_level < total_space) {
862 total_space -= fill_level;
864 /* we can't do anything with it */
869 /* if we're running close to normal speed and there isn't enough
870 space to do disk_read_chunk_frames of I/O, then don't bother.
872 at higher speeds, just do it because the sync between butler
873 and audio thread may not be good enough.
875 Note: it is a design assumption that disk_read_chunk_frames is smaller
876 than the playback buffer size, so this check should never trip when
877 the playback buffer is empty.
880 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("%1: space to refill %2 vs. chunk %3 (speed = %4)\n", name(), total_space, _chunk_frames, _session.transport_speed()));
881 if ((total_space < _chunk_frames) && fabs (_session.transport_speed()) < 2.0f) {
885 /* when slaved, don't try to get too close to the read pointer. this
886 leaves space for the buffer reversal to have something useful to
890 if (_slaved && total_space < (framecnt_t) (c->front()->buf->bufsize() / 2)) {
891 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("%1: not enough to refill while slaved\n", this));
897 if (file_frame == 0) {
899 /* at start: nothing to do but fill with silence */
901 for (chan_n = 0, i = c->begin(); i != c->end(); ++i, ++chan_n) {
903 ChannelInfo* chan (*i);
904 chan->buf->get_write_vector (&vector);
905 memset (vector.buf[0], 0, sizeof(Sample) * vector.len[0]);
907 memset (vector.buf[1], 0, sizeof(Sample) * vector.len[1]);
909 chan->buf->increment_write_ptr (vector.len[0] + vector.len[1]);
914 if (file_frame < total_space) {
916 /* too close to the start: read what we can,
917 and then zero fill the rest
920 zero_fill = total_space - file_frame;
921 total_space = file_frame;
930 if (file_frame == max_framepos) {
932 /* at end: nothing to do but fill with silence */
934 for (chan_n = 0, i = c->begin(); i != c->end(); ++i, ++chan_n) {
936 ChannelInfo* chan (*i);
937 chan->buf->get_write_vector (&vector);
938 memset (vector.buf[0], 0, sizeof(Sample) * vector.len[0]);
940 memset (vector.buf[1], 0, sizeof(Sample) * vector.len[1]);
942 chan->buf->increment_write_ptr (vector.len[0] + vector.len[1]);
947 if (file_frame > max_framepos - total_space) {
949 /* to close to the end: read what we can, and zero fill the rest */
951 zero_fill = total_space - (max_framepos - file_frame);
952 total_space = max_framepos - file_frame;
959 framepos_t file_frame_tmp = 0;
961 /* total_space is in samples. We want to optimize read sizes in various sizes using bytes */
963 const size_t bits_per_sample = format_data_width (_session.config.get_native_file_data_format());
964 size_t total_bytes = total_space * bits_per_sample / 8;
966 /* chunk size range is 256kB to 4MB. Bigger is faster in terms of MB/sec, but bigger chunk size always takes longer
968 size_t byte_size_for_read = max ((size_t) (256 * 1024), min ((size_t) (4 * 1048576), total_bytes));
970 /* find nearest (lower) multiple of 16384 */
972 byte_size_for_read = (byte_size_for_read / 16384) * 16384;
974 /* now back to samples */
976 framecnt_t samples_to_read = byte_size_for_read / (bits_per_sample / 8);
978 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("%1: will refill %2 channels with %3 samples\n", name(), c->size(), total_space));
980 // uint64_t before = g_get_monotonic_time ();
983 for (chan_n = 0, i = c->begin(); i != c->end(); ++i, ++chan_n) {
985 ChannelInfo* chan (*i);
988 framecnt_t len1, len2;
990 chan->buf->get_write_vector (&vector);
992 if ((framecnt_t) vector.len[0] > samples_to_read) {
994 /* we're not going to fill the first chunk, so certainly do not bother with the
995 other part. it won't be connected with the part we do fill, as in:
997 .... => writable space
998 ++++ => readable space
999 ^^^^ => 1 x disk_read_chunk_frames that would be filled
1001 |......|+++++++++++++|...............................|
1006 So, just pretend that the buf1 part isn't there.
1016 file_frame_tmp = file_frame;
1018 buf1 = vector.buf[0];
1019 len1 = vector.len[0];
1020 buf2 = vector.buf[1];
1021 len2 = vector.len[1];
1023 to_read = min (ts, len1);
1024 to_read = min (to_read, (framecnt_t) samples_to_read);
1026 assert (to_read >= 0);
1030 if (audio_read (buf1, mixdown_buffer, gain_buffer, file_frame_tmp, to_read, chan_n, reversed)) {
1035 chan->buf->increment_write_ptr (to_read);
1039 to_read = min (ts, len2);
1043 /* we read all of vector.len[0], but it wasn't the
1044 entire samples_to_read of data, so read some or
1045 all of vector.len[1] as well.
1048 if (audio_read (buf2, mixdown_buffer, gain_buffer, file_frame_tmp, to_read, chan_n, reversed)) {
1053 chan->buf->increment_write_ptr (to_read);
1057 /* XXX: do something */
1062 // elapsed = g_get_monotonic_time () - before;
1063 // cerr << "\tbandwidth = " << (byte_size_for_read / 1048576.0) / (elapsed/1000000.0) << "MB/sec\n";
1065 file_frame = file_frame_tmp;
1066 assert (file_frame >= 0);
1068 ret = ((total_space - samples_to_read) > _chunk_frames);
1070 c->front()->buf->get_write_vector (&vector);
1077 DiskReader::playlist_ranges_moved (list< Evoral::RangeMove<framepos_t> > const & movements_frames, bool from_undo)
1079 /* If we're coming from an undo, it will have handled
1080 automation undo (it must, since automation-follows-regions
1081 can lose automation data). Hence we can do nothing here.
1088 if (!_route || Config->get_automation_follows_regions () == false) {
1092 list< Evoral::RangeMove<double> > movements;
1094 for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin();
1095 i != movements_frames.end();
1098 movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
1101 /* move panner automation */
1102 boost::shared_ptr<Pannable> pannable = _route->pannable();
1103 Evoral::ControlSet::Controls& c (pannable->controls());
1105 for (Evoral::ControlSet::Controls::iterator ci = c.begin(); ci != c.end(); ++ci) {
1106 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl>(ci->second);
1110 boost::shared_ptr<AutomationList> alist = ac->alist();
1111 if (!alist->size()) {
1114 XMLNode & before = alist->get_state ();
1115 bool const things_moved = alist->move_ranges (movements);
1117 _session.add_command (new MementoCommand<AutomationList> (
1118 *alist.get(), &before, &alist->get_state ()));
1121 /* move processor automation */
1122 _route->foreach_processor (boost::bind (&DiskReader::move_processor_automation, this, _1, movements_frames));
1126 DiskReader::move_processor_automation (boost::weak_ptr<Processor> p, list< Evoral::RangeMove<framepos_t> > const & movements_frames)
1128 boost::shared_ptr<Processor> processor (p.lock ());
1133 list< Evoral::RangeMove<double> > movements;
1134 for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin(); i != movements_frames.end(); ++i) {
1135 movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
1138 set<Evoral::Parameter> const a = processor->what_can_be_automated ();
1140 for (set<Evoral::Parameter>::const_iterator i = a.begin (); i != a.end (); ++i) {
1141 boost::shared_ptr<AutomationList> al = processor->automation_control(*i)->alist();
1145 XMLNode & before = al->get_state ();
1146 bool const things_moved = al->move_ranges (movements);
1148 _session.add_command (
1149 new MementoCommand<AutomationList> (
1150 *al.get(), &before, &al->get_state ()
1157 boost::shared_ptr<MidiBuffer>
1158 DiskReader::get_gui_feed_buffer () const
1160 boost::shared_ptr<MidiBuffer> b (new MidiBuffer (AudioEngine::instance()->raw_buffer_size (DataType::MIDI)));
1162 Glib::Threads::Mutex::Lock lm (_gui_feed_buffer_mutex);
1163 b->copy (_gui_feed_buffer);
1168 DiskReader::reset_tracker ()
1170 _midi_buf->reset_tracker ();
1172 boost::shared_ptr<MidiPlaylist> mp (midi_playlist());
1175 mp->reset_note_trackers ();
1180 DiskReader::resolve_tracker (Evoral::EventSink<framepos_t>& buffer, framepos_t time)
1182 _midi_buf->resolve_tracker(buffer, time);
1184 boost::shared_ptr<MidiPlaylist> mp (midi_playlist());
1187 mp->reset_note_trackers ();
1192 DiskReader::flush_playback (framepos_t start, framepos_t end)
1194 _midi_buf->flush (start, end);
1195 g_atomic_int_add (&_frames_read_from_ringbuffer, end - start);
1198 /** Writes playback events from playback_sample for nframes to dst, translating time stamps
1199 * so that an event at playback_sample has time = 0
1202 DiskReader::get_playback (MidiBuffer& dst, framecnt_t nframes, MonitorState ms, BufferSet& scratch_bufs, double speed, framecnt_t playback_distance)
1206 if ((ms & MonitoringInput) == 0) {
1210 target = &scratch_bufs.get_midi (0);
1213 if (ms & MonitoringDisk) {
1214 /* no disk data needed */
1216 Location* loc = loop_location;
1218 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose (
1219 "%1 MDS pre-read read %8 offset = %9 @ %4..%5 from %2 write to %3, LOOPED ? %6 .. %7\n", _name,
1220 _midi_buf->get_read_ptr(), _midi_buf->get_write_ptr(), playback_sample, playback_sample + nframes,
1221 (loc ? loc->start() : -1), (loc ? loc->end() : -1), nframes, Port::port_offset()));
1223 //cerr << "======== PRE ========\n";
1224 //_midi_buf->dump (cerr);
1225 //cerr << "----------------\n";
1227 size_t events_read = 0;
1230 framepos_t effective_start;
1232 Evoral::Range<framepos_t> loop_range (loc->start(), loc->end() - 1);
1233 effective_start = loop_range.squish (playback_sample);
1235 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("looped, effective start adjusted to %1\n", effective_start));
1237 if (effective_start == loc->start()) {
1238 /* We need to turn off notes that may extend
1239 beyond the loop end.
1242 _midi_buf->resolve_tracker (*target, 0);
1245 /* for split-cycles we need to offset the events */
1247 if (loc->end() >= effective_start && loc->end() < effective_start + nframes) {
1249 /* end of loop is within the range we are reading, so
1250 split the read in two, and lie about the location
1254 framecnt_t first, second;
1256 first = loc->end() - effective_start;
1257 second = nframes - first;
1259 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("loop read for eff %1 end %2: %3 and %4, cycle offset %5\n",
1260 effective_start, loc->end(), first, second));
1263 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("loop read #1, from %1 for %2\n",
1264 effective_start, first));
1265 events_read = _midi_buf->read (*target, effective_start, first);
1269 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("loop read #2, from %1 for %2\n",
1270 loc->start(), second));
1271 events_read += _midi_buf->read (*target, loc->start(), second);
1275 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("loop read #3, adjusted start as %1 for %2\n",
1276 effective_start, nframes));
1277 events_read = _midi_buf->read (*target, effective_start, effective_start + nframes);
1280 const size_t n_skipped = _midi_buf->skip_to (playback_sample);
1281 if (n_skipped > 0) {
1282 warning << string_compose(_("MidiDiskstream %1: skipped %2 events, possible underflow"), id(), n_skipped) << endmsg;
1284 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("playback buffer read, from %1 to %2 (%3)", playback_sample, playback_sample + nframes, nframes));
1285 events_read = _midi_buf->read (*target, playback_sample, playback_sample + nframes);
1288 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose (
1289 "%1 MDS events read %2 range %3 .. %4 rspace %5 wspace %6 r@%7 w@%8\n",
1290 _name, events_read, playback_sample, playback_sample + nframes,
1291 _midi_buf->read_space(), _midi_buf->write_space(),
1292 _midi_buf->get_read_ptr(), _midi_buf->get_write_ptr()));
1295 g_atomic_int_add (&_frames_read_from_ringbuffer, nframes);
1299 if (speed != 0.0 && fabsf (speed) != 1.0f) {
1300 for (MidiBuffer::iterator i = target->begin(); i != target->end(); ++i) {
1301 MidiBuffer::TimeType *tme = i.timeptr();
1302 *tme = (*tme) * nframes / playback_distance;
1306 if (ms & MonitoringInput) {
1307 dst.merge_from (*target, nframes);
1310 //cerr << "======== POST ========\n";
1311 //_midi_buf->dump (cerr);
1312 //cerr << "----------------\n";
1315 /** @a start is set to the new frame position (TIME) read up to */
1317 DiskReader::midi_read (framepos_t& start, framecnt_t dur, bool reversed)
1319 framecnt_t this_read = 0;
1320 framepos_t loop_end = 0;
1321 framepos_t loop_start = 0;
1322 framecnt_t loop_length = 0;
1323 Location* loc = loop_location;
1324 framepos_t effective_start = start;
1325 Evoral::Range<framepos_t>* loop_range (0);
1327 // MidiTrack* mt = dynamic_cast<MidiTrack*>(_track);
1328 // MidiChannelFilter* filter = mt ? &mt->playback_filter() : 0;
1329 MidiChannelFilter* filter = 0;
1331 frameoffset_t loop_offset = 0;
1333 if (!reversed && loc) {
1334 get_location_times (loc, &loop_start, &loop_end, &loop_length);
1339 /* take any loop into account. we can't read past the end of the loop. */
1341 if (loc && !reversed) {
1344 loop_range = new Evoral::Range<framepos_t> (loop_start, loop_end-1); // inclusive semantics require -1
1347 /* if we are (seamlessly) looping, ensure that the first frame we read is at the correct
1348 position within the loop.
1351 effective_start = loop_range->squish (effective_start);
1353 if ((loop_end - effective_start) <= dur) {
1354 /* too close to end of loop to read "dur", so
1357 this_read = loop_end - effective_start;
1366 if (this_read == 0) {
1370 this_read = min (dur,this_read);
1372 DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("MDS ::read at %1 for %2 loffset %3\n", effective_start, this_read, loop_offset));
1374 if (midi_playlist()->read (*_midi_buf, effective_start, this_read, loop_range, 0, filter) != this_read) {
1375 error << string_compose(
1376 _("MidiDiskstream %1: cannot read %2 from playlist at frame %3"),
1377 id(), this_read, start) << endmsg;
1381 g_atomic_int_add (&_frames_written_to_ringbuffer, this_read);
1385 // Swap note ons with note offs here. etc?
1386 // Fully reversing MIDI requires look-ahead (well, behind) to find previous
1387 // CC values etc. hard.
1391 /* adjust passed-by-reference argument (note: this is
1392 monotonic and does not reflect looping.
1396 /* similarly adjust effective_start, but this may be
1397 readjusted for seamless looping as we continue around
1400 effective_start += this_read;
1404 //offset += this_read;
1411 DiskReader::refill_midi ()
1413 if (!_playlists[DataType::MIDI]) {
1417 size_t write_space = _midi_buf->write_space();
1418 const bool reversed = _session.transport_speed() < 0.0f;
1420 DEBUG_TRACE (DEBUG::DiskIO, string_compose ("MIDI refill, write space = %1 file frame = %2\n", write_space, file_frame));
1422 /* no space to write */
1423 if (write_space == 0) {
1431 /* at end: nothing to do */
1433 if (file_frame == max_framepos) {
1438 const uint32_t frames_read = g_atomic_int_get (&_frames_read_from_ringbuffer);
1439 const uint32_t frames_written = g_atomic_int_get (&_frames_written_to_ringbuffer);
1441 if ((frames_read < frames_written) && (frames_written - frames_read) >= midi_readahead) {
1445 framecnt_t to_read = midi_readahead - ((framecnt_t)frames_written - (framecnt_t)frames_read);
1447 to_read = min (to_read, (framecnt_t) (max_framepos - file_frame));
1448 to_read = min (to_read, (framecnt_t) write_space);
1450 if (midi_read (file_frame, to_read, reversed)) {