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livetrax/libs/ardour/midi_diskstream.cc

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/*
Copyright (C) 2000-2003 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <fstream>
#include <cstdio>
#include <unistd.h>
#include <cmath>
#include <cerrno>
#include <string>
#include <climits>
#include <fcntl.h>
#include <cstdlib>
#include <ctime>
#include <sys/stat.h>
#include <sys/mman.h>
#include "pbd/error.h"
#include "pbd/basename.h"
#include <glibmm/thread.h>
#include "pbd/xml++.h"
#include "pbd/memento_command.h"
#include "pbd/enumwriter.h"
#include "pbd/stateful_diff_command.h"
#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/butler.h"
#include "ardour/configuration.h"
#include "ardour/cycle_timer.h"
#include "ardour/debug.h"
#include "ardour/io.h"
#include "ardour/midi_diskstream.h"
#include "ardour/midi_playlist.h"
#include "ardour/midi_port.h"
#include "ardour/midi_region.h"
#include "ardour/playlist_factory.h"
#include "ardour/region_factory.h"
#include "ardour/send.h"
#include "ardour/session.h"
#include "ardour/smf_source.h"
#include "ardour/utils.h"
#include "ardour/session_playlists.h"
#include "ardour/route.h"
#include "midi++/types.h"
#include "i18n.h"
#include <locale.h>
using namespace std;
using namespace ARDOUR;
using namespace PBD;
nframes_t MidiDiskstream::midi_readahead = 4096;
MidiDiskstream::MidiDiskstream (Session &sess, const string &name, Diskstream::Flag flag)
: Diskstream(sess, name, flag)
, _playback_buf(0)
, _capture_buf(0)
, _source_port(0)
, _last_flush_frame(0)
, _note_mode(Sustained)
, _frames_written_to_ringbuffer(0)
, _frames_read_from_ringbuffer(0)
{
/* prevent any write sources from being created */
in_set_state = true;
init ();
use_new_playlist ();
in_set_state = false;
assert(!destructive());
}
MidiDiskstream::MidiDiskstream (Session& sess, const XMLNode& node)
: Diskstream(sess, node)
, _playback_buf(0)
, _capture_buf(0)
, _source_port(0)
, _last_flush_frame(0)
, _note_mode(Sustained)
, _frames_written_to_ringbuffer(0)
, _frames_read_from_ringbuffer(0)
{
in_set_state = true;
init ();
if (set_state (node, Stateful::loading_state_version)) {
in_set_state = false;
throw failed_constructor();
}
in_set_state = false;
if (destructive()) {
use_destructive_playlist ();
}
}
void
MidiDiskstream::init ()
{
/* there are no channels at this point, so these
two calls just get speed_buffer_size and wrap_buffer
size setup without duplicating their code.
*/
set_block_size (_session.get_block_size());
allocate_temporary_buffers ();
const size_t size = _session.butler()->midi_diskstream_buffer_size();
_playback_buf = new MidiRingBuffer<nframes_t>(size);
_capture_buf = new MidiRingBuffer<nframes_t>(size);
_n_channels = ChanCount(DataType::MIDI, 1);
assert(recordable());
}
MidiDiskstream::~MidiDiskstream ()
{
Glib::Mutex::Lock lm (state_lock);
}
void
MidiDiskstream::non_realtime_locate (nframes_t position)
{
if (_write_source) {
_write_source->set_timeline_position (position);
}
seek(position, false);
}
void
MidiDiskstream::non_realtime_input_change ()
{
{
Glib::Mutex::Lock lm (state_lock);
if (input_change_pending == NoChange) {
return;
}
if (input_change_pending & ConfigurationChanged) {
if (_io->n_ports().n_midi() != _n_channels.n_midi()) {
error << "Can not feed IO " << _io->n_ports()
<< " with diskstream " << _n_channels << endl;
}
}
get_input_sources ();
set_capture_offset ();
if (first_input_change) {
set_align_style (_persistent_alignment_style);
first_input_change = false;
} else {
set_align_style_from_io ();
}
input_change_pending = NoChange;
/* implicit unlock */
}
/* reset capture files */
reset_write_sources (false);
/* now refill channel buffers */
if (speed() != 1.0f || speed() != -1.0f) {
seek ((nframes_t) (_session.transport_frame() * (double) speed()));
}
else {
seek (_session.transport_frame());
}
_last_flush_frame = _session.transport_frame();
}
void
MidiDiskstream::get_input_sources ()
{
uint32_t ni = _io->n_ports().n_midi();
if (ni == 0) {
return;
}
// This is all we do for now at least
assert(ni == 1);
_source_port = _io->midi(0);
// do... stuff?
}
int
MidiDiskstream::find_and_use_playlist (const string& name)
{
boost::shared_ptr<MidiPlaylist> playlist;
if ((playlist = boost::dynamic_pointer_cast<MidiPlaylist> (_session.playlists->by_name (name))) == 0) {
playlist = boost::dynamic_pointer_cast<MidiPlaylist> (PlaylistFactory::create (DataType::MIDI, _session, name));
}
if (!playlist) {
error << string_compose(_("MidiDiskstream: Playlist \"%1\" isn't an midi playlist"), name) << endmsg;
return -1;
}
return use_playlist (playlist);
}
int
MidiDiskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
{
assert(boost::dynamic_pointer_cast<MidiPlaylist>(playlist));
Diskstream::use_playlist(playlist);
return 0;
}
int
MidiDiskstream::use_new_playlist ()
{
string newname;
boost::shared_ptr<MidiPlaylist> playlist;
if (!in_set_state && destructive()) {
return 0;
}
if (_playlist) {
newname = Playlist::bump_name (_playlist->name(), _session);
} else {
newname = Playlist::bump_name (_name, _session);
}
if ((playlist = boost::dynamic_pointer_cast<MidiPlaylist> (PlaylistFactory::create (
DataType::MIDI, _session, newname, hidden()))) != 0) {
playlist->set_orig_diskstream_id (id());
return use_playlist (playlist);
} else {
return -1;
}
}
int
MidiDiskstream::use_copy_playlist ()
{
assert(midi_playlist());
if (destructive()) {
return 0;
}
if (_playlist == 0) {
error << string_compose(_("MidiDiskstream %1: there is no existing playlist to make a copy of!"), _name) << endmsg;
return -1;
}
string newname;
boost::shared_ptr<MidiPlaylist> playlist;
newname = Playlist::bump_name (_playlist->name(), _session);
if ((playlist = boost::dynamic_pointer_cast<MidiPlaylist>(PlaylistFactory::create (midi_playlist(), newname))) != 0) {
playlist->set_orig_diskstream_id (id());
return use_playlist (playlist);
} else {
return -1;
}
}
/** Overloaded from parent to die horribly
*/
int
MidiDiskstream::set_destructive (bool yn)
{
assert( ! destructive());
assert( ! yn);
return -1;
}
void
MidiDiskstream::set_note_mode (NoteMode m)
{
_note_mode = m;
midi_playlist()->set_note_mode(m);
if (_write_source && _write_source->model())
_write_source->model()->set_note_mode(m);
}
#if 0
static void
trace_midi (ostream& o, MIDI::byte *msg, size_t len)
{
using namespace MIDI;
eventType type;
const char trace_prefix = ':';
type = (eventType) (msg[0]&0xF0);
switch (type) {
case off:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " NoteOff NoteNum "
<< (int) msg[1]
<< " Vel "
<< (int) msg[2]
<< endl;
break;
case on:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " NoteOn NoteNum "
<< (int) msg[1]
<< " Vel "
<< (int) msg[2]
<< endl;
break;
case polypress:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " PolyPressure"
<< (int) msg[1]
<< endl;
break;
case MIDI::controller:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " Controller "
<< (int) msg[1]
<< " Value "
<< (int) msg[2]
<< endl;
break;
case program:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " Program Change ProgNum "
<< (int) msg[1]
<< endl;
break;
case chanpress:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " Channel Pressure "
<< (int) msg[1]
<< endl;
break;
case MIDI::pitchbend:
o << trace_prefix
<< "Channel "
<< (msg[0]&0xF)+1
<< " Pitch Bend "
<< ((msg[2]<<7)|msg[1])
<< endl;
break;
case MIDI::sysex:
if (len == 1) {
switch (msg[0]) {
case 0xf8:
o << trace_prefix
<< "Clock"
<< endl;
break;
case 0xfa:
o << trace_prefix
<< "Start"
<< endl;
break;
case 0xfb:
o << trace_prefix
<< "Continue"
<< endl;
break;
case 0xfc:
o << trace_prefix
<< "Stop"
<< endl;
break;
case 0xfe:
o << trace_prefix
<< "Active Sense"
<< endl;
break;
case 0xff:
o << trace_prefix
<< "System Reset"
<< endl;
break;
default:
o << trace_prefix
<< "System Exclusive (1 byte : " << hex << (int) *msg << dec << ')'
<< endl;
break;
}
} else {
o << trace_prefix
<< "System Exclusive (" << len << ") = [ " << hex;
for (unsigned int i = 0; i < len; ++i) {
o << (int) msg[i] << ' ';
}
o << dec << ']' << endl;
}
break;
case MIDI::song:
o << trace_prefix << "Song" << endl;
break;
case MIDI::tune:
o << trace_prefix << "Tune" << endl;
break;
case MIDI::eox:
o << trace_prefix << "End-of-System Exclusive" << endl;
break;
case MIDI::timing:
o << trace_prefix << "Timing" << endl;
break;
case MIDI::start:
o << trace_prefix << "Start" << endl;
break;
case MIDI::stop:
o << trace_prefix << "Stop" << endl;
break;
case MIDI::contineu:
o << trace_prefix << "Continue" << endl;
break;
case active:
o << trace_prefix << "Active Sense" << endl;
break;
default:
o << trace_prefix << "Unrecognized MIDI message" << endl;
break;
}
}
#endif
int
MidiDiskstream::process (nframes_t transport_frame, nframes_t nframes, bool can_record, bool rec_monitors_input, bool& need_butler)
{
int ret = -1;
nframes_t rec_offset = 0;
nframes_t rec_nframes = 0;
bool nominally_recording;
bool re = record_enabled ();
playback_distance = 0;
check_record_status (transport_frame, nframes, can_record);
nominally_recording = (can_record && re);
if (nframes == 0) {
return 0;
}
Glib::Mutex::Lock sm (state_lock, Glib::TRY_LOCK);
if (!sm.locked()) {
return 1;
}
adjust_capture_position = 0;
if (nominally_recording || (_session.get_record_enabled() && _session.config.get_punch_in())) {
OverlapType ot = coverage (first_recordable_frame, last_recordable_frame, transport_frame, transport_frame + nframes);
calculate_record_range(ot, transport_frame, nframes, rec_nframes, rec_offset);
if (rec_nframes && !was_recording) {
capture_captured = 0;
was_recording = true;
}
}
if (can_record && !_last_capture_sources.empty()) {
_last_capture_sources.clear ();
}
if (nominally_recording || rec_nframes) {
// Pump entire port buffer into the ring buffer (FIXME: split cycles?)
MidiBuffer& buf = _source_port->get_midi_buffer(nframes);
for (MidiBuffer::iterator i = buf.begin(); i != buf.end(); ++i) {
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev(*i, false);
assert(ev.buffer());
_capture_buf->write(ev.time() + transport_frame, ev.type(), ev.size(), ev.buffer());
}
} else {
if (was_recording) {
finish_capture (rec_monitors_input);
}
}
if (rec_nframes) {
/* data will be written to disk */
if (rec_nframes == nframes && rec_offset == 0) {
playback_distance = nframes;
}
adjust_capture_position = rec_nframes;
} else if (nominally_recording) {
/* XXXX do this for MIDI !!!
can't do actual capture yet - waiting for latency effects to finish before we start
*/
playback_distance = nframes;
}
ret = 0;
if (commit (nframes)) {
need_butler = true;
}
return ret;
}
bool
MidiDiskstream::commit (nframes_t nframes)
{
bool need_butler = false;
if (_actual_speed < 0.0) {
playback_sample -= playback_distance;
} else {
playback_sample += playback_distance;
}
if (adjust_capture_position != 0) {
capture_captured += adjust_capture_position;
adjust_capture_position = 0;
}
uint32_t frames_read = g_atomic_int_get(&_frames_read_from_ringbuffer);
uint32_t frames_written = g_atomic_int_get(&_frames_written_to_ringbuffer);
if ((frames_written - frames_read) + nframes < midi_readahead) {
need_butler = true;
}
/*cerr << "MDS written: " << frames_written << " - read: " << frames_read <<
" = " << frames_written - frames_read
<< " + " << nframes << " < " << midi_readahead << " = " << need_butler << ")" << endl;*/
return need_butler;
}
void
MidiDiskstream::set_pending_overwrite (bool yn)
{
/* called from audio thread, so we can use the read ptr and playback sample as we wish */
_pending_overwrite = yn;
overwrite_frame = playback_sample;
}
int
MidiDiskstream::overwrite_existing_buffers ()
{
//read(overwrite_frame, disk_io_chunk_frames, false);
overwrite_queued = false;
_pending_overwrite = false;
return 0;
}
int
MidiDiskstream::seek (nframes_t frame, bool complete_refill)
{
Glib::Mutex::Lock lm (state_lock);
int ret = -1;
_playback_buf->reset();
_capture_buf->reset();
g_atomic_int_set(&_frames_read_from_ringbuffer, 0);
g_atomic_int_set(&_frames_written_to_ringbuffer, 0);
playback_sample = frame;
file_frame = frame;
if (complete_refill) {
while ((ret = do_refill_with_alloc ()) > 0) ;
} else {
ret = do_refill_with_alloc ();
}
return ret;
}
int
MidiDiskstream::can_internal_playback_seek (nframes_t distance)
{
uint32_t frames_read = g_atomic_int_get(&_frames_read_from_ringbuffer);
uint32_t frames_written = g_atomic_int_get(&_frames_written_to_ringbuffer);
return ((frames_written - frames_read) < distance);
}
int
MidiDiskstream::internal_playback_seek (nframes_t distance)
{
first_recordable_frame += distance;
playback_sample += distance;
return 0;
}
/** @a start is set to the new frame position (TIME) read up to */
int
MidiDiskstream::read (nframes_t& start, nframes_t dur, bool reversed)
{
nframes_t this_read = 0;
bool reloop = false;
nframes_t loop_end = 0;
nframes_t loop_start = 0;
Location *loc = 0;
if (!reversed) {
nframes_t loop_length = 0;
/* Make the use of a Location atomic for this read operation.
Note: Locations don't get deleted, so all we care about
when I say "atomic" is that we are always pointing to
the same one and using a start/length values obtained
just once.
*/
if ((loc = loop_location) != 0) {
loop_start = loc->start();
loop_end = loc->end();
loop_length = loop_end - loop_start;
}
/* if we are looping, ensure that the first frame we read is at the correct
position within the loop.
*/
if (loc && (start >= loop_end)) {
//cerr << "start adjusted from " << start;
start = loop_start + ((start - loop_start) % loop_length);
//cerr << "to " << start << endl;
}
//cerr << "start is " << start << " loopstart: " << loop_start << " loopend: " << loop_end << endl;
}
while (dur) {
/* take any loop into account. we can't read past the end of the loop. */
if (loc && (loop_end - start < dur)) {
this_read = loop_end - start;
//cerr << "reloop true: thisread: " << this_read << " dur: " << dur << endl;
reloop = true;
} else {
reloop = false;
this_read = dur;
}
if (this_read == 0) {
break;
}
this_read = min(dur,this_read);
if (midi_playlist()->read (*_playback_buf, start, this_read) != this_read) {
error << string_compose(
_("MidiDiskstream %1: cannot read %2 from playlist at frame %3"),
_id, this_read, start) << endmsg;
return -1;
}
g_atomic_int_add(&_frames_written_to_ringbuffer, this_read);
_read_data_count = _playlist->read_data_count();
if (reversed) {
// Swap note ons with note offs here. etc?
// Fully reversing MIDI requires look-ahead (well, behind) to find previous
// CC values etc. hard.
} else {
/* if we read to the end of the loop, go back to the beginning */
if (reloop) {
// Synthesize LoopEvent here, because the next events
// written will have non-monotonic timestamps.
_playback_buf->write(loop_end - 1, LoopEventType, 0, 0);
cout << "Pushing LoopEvent ts=" << loop_end-1
<< " start+this_read " << start+this_read << endl;
start = loop_start;
} else {
start += this_read;
}
}
dur -= this_read;
//offset += this_read;
}
return 0;
}
int
MidiDiskstream::do_refill_with_alloc ()
{
return do_refill();
}
int
MidiDiskstream::do_refill ()
{
int ret = 0;
size_t write_space = _playback_buf->write_space();
bool reversed = (_visible_speed * _session.transport_speed()) < 0.0f;
if (write_space == 0) {
return 0;
}
if (reversed) {
return 0;
}
/* at end: nothing to do */
if (file_frame == max_frames) {
return 0;
}
// At this point we...
assert(_playback_buf->write_space() > 0); // ... have something to write to, and
assert(file_frame <= max_frames); // ... something to write
// now calculate how much time is in the ringbuffer.
// and lets write as much as we need to get this to be midi_readahead;
uint32_t frames_read = g_atomic_int_get(&_frames_read_from_ringbuffer);
uint32_t frames_written = g_atomic_int_get(&_frames_written_to_ringbuffer);
if ((frames_written - frames_read) >= midi_readahead) {
//cout << "MDS Nothing to do. all fine" << endl;
return 0;
}
nframes_t to_read = midi_readahead - (frames_written - frames_read);
//cout << "MDS read for midi_readahead " << to_read << " rb_contains: "
// << frames_written - frames_read << endl;
to_read = min(to_read, (max_frames - file_frame));
if (read (file_frame, to_read, reversed)) {
ret = -1;
}
return ret;
}
/** Flush pending data to disk.
*
* Important note: this function will write *AT MOST* disk_io_chunk_frames
* of data to disk. it will never write more than that. If it writes that
* much and there is more than that waiting to be written, it will return 1,
* otherwise 0 on success or -1 on failure.
*
* If there is less than disk_io_chunk_frames to be written, no data will be
* written at all unless @a force_flush is true.
*/
int
MidiDiskstream::do_flush (RunContext /*context*/, bool force_flush)
{
uint32_t to_write;
int32_t ret = 0;
nframes_t total;
_write_data_count = 0;
total = _session.transport_frame() - _last_flush_frame;
if (_last_flush_frame > _session.transport_frame()
|| _last_flush_frame < capture_start_frame) {
_last_flush_frame = _session.transport_frame();
}
if (total == 0 || _capture_buf->read_space() == 0
|| (!force_flush && (total < disk_io_chunk_frames && was_recording))) {
goto out;
}
/* if there are 2+ chunks of disk i/o possible for
this track, let the caller know so that it can arrange
for us to be called again, ASAP.
if we are forcing a flush, then if there is* any* extra
work, let the caller know.
if we are no longer recording and there is any extra work,
let the caller know too.
*/
if (total >= 2 * disk_io_chunk_frames || ((force_flush || !was_recording) && total > disk_io_chunk_frames)) {
ret = 1;
}
to_write = disk_io_chunk_frames;
assert(!destructive());
if (record_enabled()
&& ( (_session.transport_frame() - _last_flush_frame > disk_io_chunk_frames)
|| force_flush)) {
if ((!_write_source) || _write_source->midi_write (*_capture_buf, capture_start_frame, to_write) != to_write) {
error << string_compose(_("MidiDiskstream %1: cannot write to disk"), _id) << endmsg;
return -1;
} else {
_last_flush_frame = _session.transport_frame();
}
}
out:
return ret;
}
void
MidiDiskstream::transport_stopped_wallclock (struct tm& /*when*/, time_t /*twhen*/, bool abort_capture)
{
bool more_work = true;
int err = 0;
boost::shared_ptr<MidiRegion> region;
MidiRegion::SourceList srcs;
MidiRegion::SourceList::iterator src;
vector<CaptureInfo*>::iterator ci;
bool mark_write_completed = false;
finish_capture (true);
/* butler is already stopped, but there may be work to do
to flush remaining data to disk.
*/
while (more_work && !err) {
switch (do_flush (TransportContext, true)) {
case 0:
more_work = false;
break;
case 1:
break;
case -1:
error << string_compose(_("MidiDiskstream \"%1\": cannot flush captured data to disk!"), _name) << endmsg;
err++;
}
}
/* XXX is there anything we can do if err != 0 ? */
Glib::Mutex::Lock lm (capture_info_lock);
if (capture_info.empty()) {
return;
}
if (abort_capture) {
if (_write_source) {
_write_source->mark_for_remove ();
_write_source.reset();
}
/* new source set up in "out" below */
} else {
assert(_write_source);
nframes_t total_capture = 0;
for (ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
total_capture += (*ci)->frames;
}
if (_write_source->length (capture_info.front()->start) != 0) {
/* phew, we have data */
/* figure out the name for this take */
srcs.push_back (_write_source);
_write_source->set_timeline_position (capture_info.front()->start);
_write_source->set_captured_for (_name);
string whole_file_region_name;
whole_file_region_name = region_name_from_path (_write_source->name(), true);
/* Register a new region with the Session that
describes the entire source. Do this first
so that any sub-regions will obviously be
children of this one (later!)
*/
try {
PropertyList plist;
plist.add (Properties::name, whole_file_region_name);
plist.add (Properties::whole_file, true);
plist.add (Properties::automatic, true);
plist.add (Properties::start, 0);
plist.add (Properties::length, total_capture);
plist.add (Properties::layer, 0);
boost::shared_ptr<Region> rx (RegionFactory::create (srcs, plist));
region = boost::dynamic_pointer_cast<MidiRegion> (rx);
region->special_set_position (capture_info.front()->start);
}
catch (failed_constructor& err) {
error << string_compose(_("%1: could not create region for complete midi file"), _name) << endmsg;
/* XXX what now? */
}
_last_capture_sources.insert (_last_capture_sources.end(), srcs.begin(), srcs.end());
_playlist->clear_history ();
_playlist->freeze ();
uint32_t buffer_position = 0;
for (buffer_position = 0, ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
string region_name;
RegionFactory::region_name (region_name, _write_source->name(), false);
// cerr << _name << ": based on ci of " << (*ci)->start << " for " << (*ci)->frames << " add a region\n";
try {
PropertyList plist;
plist.add (Properties::start, buffer_position);
plist.add (Properties::length, (*ci)->frames);
plist.add (Properties::name, region_name);
boost::shared_ptr<Region> rx (RegionFactory::create (srcs, plist));
region = boost::dynamic_pointer_cast<MidiRegion> (rx);
}
catch (failed_constructor& err) {
error << _("MidiDiskstream: could not create region for captured midi!") << endmsg;
continue; /* XXX is this OK? */
}
// cerr << "add new region, buffer position = " << buffer_position << " @ " << (*ci)->start << endl;
i_am_the_modifier++;
_playlist->add_region (region, (*ci)->start);
i_am_the_modifier--;
buffer_position += (*ci)->frames;
}
_playlist->thaw ();
_session.add_command (new StatefulDiffCommand(_playlist));
}
}
mark_write_completed = true;
reset_write_sources (mark_write_completed);
for (ci = capture_info.begin(); ci != capture_info.end(); ++ci) {
delete *ci;
}
if (_playlist) {
midi_playlist()->clear_note_trackers ();
}
capture_info.clear ();
capture_start_frame = 0;
}
void
MidiDiskstream::transport_looped (nframes_t transport_frame)
{
if (was_recording) {
// adjust the capture length knowing that the data will be recorded to disk
// only necessary after the first loop where we're recording
if (capture_info.size() == 0) {
capture_captured += _capture_offset;
if (_alignment_style == ExistingMaterial) {
capture_captured += _session.worst_output_latency();
} else {
capture_captured += _roll_delay;
}
}
finish_capture (true);
// the next region will start recording via the normal mechanism
// we'll set the start position to the current transport pos
// no latency adjustment or capture offset needs to be made, as that already happened the first time
capture_start_frame = transport_frame;
first_recordable_frame = transport_frame; // mild lie
last_recordable_frame = max_frames;
was_recording = true;
}
}
void
MidiDiskstream::finish_capture (bool /*rec_monitors_input*/)
{
was_recording = false;
if (capture_captured == 0) {
return;
}
// Why must we destroy?
assert(!destructive());
CaptureInfo* ci = new CaptureInfo;
ci->start = capture_start_frame;
ci->frames = capture_captured;
/* XXX theoretical race condition here. Need atomic exchange ?
However, the circumstances when this is called right
now (either on record-disable or transport_stopped)
mean that no actual race exists. I think ...
We now have a capture_info_lock, but it is only to be used
to synchronize in the transport_stop and the capture info
accessors, so that invalidation will not occur (both non-realtime).
*/
// cerr << "Finish capture, add new CI, " << ci->start << '+' << ci->frames << endl;
capture_info.push_back (ci);
capture_captured = 0;
}
void
MidiDiskstream::set_record_enabled (bool yn)
{
if (!recordable() || !_session.record_enabling_legal()) {
return;
}
assert(!destructive());
/* yes, i know that this not proof against race conditions, but its
good enough. i think.
*/
if (record_enabled() != yn) {
if (yn) {
engage_record_enable ();
} else {
disengage_record_enable ();
}
}
}
void
MidiDiskstream::engage_record_enable ()
{
bool rolling = _session.transport_speed() != 0.0f;
g_atomic_int_set (&_record_enabled, 1);
if (_source_port && Config->get_monitoring_model() == HardwareMonitoring) {
_source_port->request_monitor_input (!(_session.config.get_auto_input() && rolling));
}
// FIXME: Why is this necessary? Isn't needed for AudioDiskstream...
if (!_write_source)
use_new_write_source();
_write_source->mark_streaming_midi_write_started (_note_mode, _session.transport_frame());
RecordEnableChanged (); /* EMIT SIGNAL */
}
void
MidiDiskstream::disengage_record_enable ()
{
g_atomic_int_set (&_record_enabled, 0);
if (_source_port && Config->get_monitoring_model() == HardwareMonitoring) {
if (_source_port) {
_source_port->request_monitor_input (false);
}
}
RecordEnableChanged (); /* EMIT SIGNAL */
}
XMLNode&
MidiDiskstream::get_state ()
{
XMLNode* node = new XMLNode ("Diskstream");
char buf[64];
LocaleGuard lg (X_("POSIX"));
snprintf (buf, sizeof(buf), "0x%x", _flags);
node->add_property ("flags", buf);
node->add_property("channel-mode", enum_2_string(get_channel_mode()));
snprintf (buf, sizeof(buf), "0x%x", get_channel_mask());
node->add_property("channel-mask", buf);
node->add_property ("playlist", _playlist->name());
snprintf (buf, sizeof(buf), "%f", _visible_speed);
node->add_property ("speed", buf);
node->add_property("name", _name);
id().print(buf, sizeof(buf));
node->add_property("id", buf);
if (_write_source && _session.get_record_enabled()) {
XMLNode* cs_child = new XMLNode (X_("CapturingSources"));
XMLNode* cs_grandchild;
cs_grandchild = new XMLNode (X_("file"));
cs_grandchild->add_property (X_("path"), _write_source->path());
cs_child->add_child_nocopy (*cs_grandchild);
/* store the location where capture will start */
Location* pi;
if (_session.config.get_punch_in() && ((pi = _session.locations()->auto_punch_location()) != 0)) {
snprintf (buf, sizeof (buf), "%" PRId64, pi->start());
} else {
snprintf (buf, sizeof (buf), "%" PRId64, _session.transport_frame());
}
cs_child->add_property (X_("at"), buf);
node->add_child_nocopy (*cs_child);
}
if (_extra_xml) {
node->add_child_copy (*_extra_xml);
}
return* node;
}
int
MidiDiskstream::set_state (const XMLNode& node, int /*version*/)
{
const XMLProperty* prop;
XMLNodeList nlist = node.children();
XMLNodeIterator niter;
XMLNode* capture_pending_node = 0;
LocaleGuard lg (X_("POSIX"));
in_set_state = true;
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
/*if ((*niter)->name() == IO::state_node_name) {
deprecated_io_node = new XMLNode (**niter);
}*/
assert ((*niter)->name() != IO::state_node_name);
if ((*niter)->name() == X_("CapturingSources")) {
capture_pending_node = *niter;
}
}
/* prevent write sources from being created */
in_set_state = true;
if ((prop = node.property ("name")) != 0) {
_name = prop->value();
}
if ((prop = node.property ("id")) != 0) {
_id = prop->value ();
}
if ((prop = node.property ("flags")) != 0) {
_flags = Flag (string_2_enum (prop->value(), _flags));
}
ChannelMode channel_mode = AllChannels;
if ((prop = node.property ("channel-mode")) != 0) {
channel_mode = ChannelMode (string_2_enum(prop->value(), channel_mode));
}
unsigned int channel_mask = 0xFFFF;
if ((prop = node.property ("channel-mask")) != 0) {
sscanf (prop->value().c_str(), "0x%x", &channel_mask);
if (channel_mask & (~0xFFFF)) {
warning << _("MidiDiskstream: XML property channel-mask out of range") << endmsg;
}
}
set_channel_mode(channel_mode, channel_mask);
if ((prop = node.property ("playlist")) == 0) {
return -1;
}
{
bool had_playlist = (_playlist != 0);
if (find_and_use_playlist (prop->value())) {
return -1;
}
if (!had_playlist) {
_playlist->set_orig_diskstream_id (id());
}
if (capture_pending_node) {
use_pending_capture_data (*capture_pending_node);
}
}
if ((prop = node.property ("speed")) != 0) {
double sp = atof (prop->value().c_str());
if (realtime_set_speed (sp, false)) {
non_realtime_set_speed ();
}
}
in_set_state = false;
/* make sure this is clear before we do anything else */
// FIXME?
//_capturing_source = 0;
/* write sources are handled when we handle the input set
up of the IO that owns this DS (::non_realtime_input_change())
*/
in_set_state = false;
return 0;
}
int
MidiDiskstream::use_new_write_source (uint32_t n)
{
cerr << name() << " use new write source for n = " << n << " recordable ? " << recordable() << endl;
if (!recordable()) {
return 1;
}
assert(n == 0);
if (_write_source) {
if (_write_source->is_empty ()) {
/* remove any region that is using this empty source; they can result when MIDI recordings
are made, but no MIDI data is received.
*/
_playlist->remove_region_by_source (_write_source);
_write_source->mark_for_remove ();
_write_source->drop_references ();
_write_source.reset();
} else {
_write_source.reset();
}
}
try {
_write_source = boost::dynamic_pointer_cast<SMFSource>(_session.create_midi_source_for_session (0, name ()));
if (!_write_source) {
throw failed_constructor();
}
}
catch (failed_constructor &err) {
error << string_compose (_("%1:%2 new capture file not initialized correctly"), _name, n) << endmsg;
_write_source.reset();
return -1;
}
_write_source->set_allow_remove_if_empty (true);
_write_source->mark_streaming_midi_write_started (_note_mode, _session.transport_frame());
return 0;
}
list<boost::shared_ptr<Source> >
MidiDiskstream::steal_write_sources()
{
list<boost::shared_ptr<Source> > ret;
ret.push_back (_write_source);
reset_write_sources (false);
return ret;
}
void
MidiDiskstream::reset_write_sources (bool mark_write_complete, bool /*force*/)
{
if (!_session.writable() || !recordable()) {
return;
}
if (_write_source && mark_write_complete) {
_write_source->mark_streaming_write_completed ();
}
use_new_write_source (0);
}
int
MidiDiskstream::rename_write_sources ()
{
if (_write_source != 0) {
_write_source->set_source_name (_name.val(), destructive());
/* XXX what to do if this fails ? */
}
return 0;
}
void
MidiDiskstream::set_block_size (nframes_t /*nframes*/)
{
}
void
MidiDiskstream::allocate_temporary_buffers ()
{
}
void
MidiDiskstream::monitor_input (bool yn)
{
if (_source_port)
_source_port->ensure_monitor_input (yn);
}
void
MidiDiskstream::set_align_style_from_io ()
{
bool have_physical = false;
if (_io == 0) {
return;
}
get_input_sources ();
if (_source_port && _source_port->flags() & JackPortIsPhysical) {
have_physical = true;
}
if (have_physical) {
set_align_style (ExistingMaterial);
} else {
set_align_style (CaptureTime);
}
}
float
MidiDiskstream::playback_buffer_load () const
{
return (float) ((double) _playback_buf->read_space()/
(double) _playback_buf->capacity());
}
float
MidiDiskstream::capture_buffer_load () const
{
return (float) ((double) _capture_buf->write_space()/
(double) _capture_buf->capacity());
}
int
MidiDiskstream::use_pending_capture_data (XMLNode& /*node*/)
{
return 0;
}
/** Writes playback events in the given range to \a dst, translating time stamps
* so that an event at \a start has time = 0
*/
void
MidiDiskstream::get_playback (MidiBuffer& dst, nframes_t start, nframes_t end)
{
dst.clear();
assert(dst.size() == 0);
// Reverse. ... We just don't do reverse, ok? Back off.
if (end <= start) {
return;
}
// Translates stamps to be relative to start
#ifndef NDEBUG
const size_t events_read = _playback_buf->read(dst, start, end);
DEBUG_TRACE (DEBUG::MidiDiskstreamIO, string_compose ("%1 MDS events read %2 range %3 .. %4 rspace %5 wspace %6\n", _name, events_read, start, end,
_playback_buf->read_space(), _playback_buf->write_space()));
#else
_playback_buf->read(dst, start, end);
#endif
gint32 frames_read = end - start;
g_atomic_int_add(&_frames_read_from_ringbuffer, frames_read);
}
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