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livetrax/libs/ardour/track.cc
Paul Davis 0108f9f18d add the Tracks version of Track::monitoring_state()
This drastically-stripped down version of the Ardour original is used only when USE_TRACKS_CODE_FEATURES
is defined. It doesn't respond to many aspects/features of libardour.
2015-06-29 14:18:10 -04:00

1145 lines
25 KiB
C++

/*
Copyright (C) 2006 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 "pbd/error.h"
#include "ardour/amp.h"
#include "ardour/debug.h"
#include "ardour/delivery.h"
#include "ardour/diskstream.h"
#include "ardour/io_processor.h"
#include "ardour/meter.h"
#include "ardour/playlist.h"
#include "ardour/port.h"
#include "ardour/processor.h"
#include "ardour/route_group_specialized.h"
#include "ardour/session.h"
#include "ardour/session_playlists.h"
#include "ardour/track.h"
#include "ardour/utils.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
Track::Track (Session& sess, string name, Route::Flag flag, TrackMode mode, DataType default_type)
: Route (sess, name, flag, default_type)
, _saved_meter_point (_meter_point)
, _mode (mode)
, _monitoring (MonitorAuto)
{
_freeze_record.state = NoFreeze;
_declickable = true;
}
Track::~Track ()
{
DEBUG_TRACE (DEBUG::Destruction, string_compose ("track %1 destructor\n", _name));
}
int
Track::init ()
{
if (Route::init ()) {
return -1;
}
boost::shared_ptr<Route> rp (shared_from_this());
boost::shared_ptr<Track> rt = boost::dynamic_pointer_cast<Track> (rp);
_rec_enable_control = boost::shared_ptr<RecEnableControl> (new RecEnableControl(rt));
_rec_enable_control->set_flags (Controllable::Toggle);
/* don't add rec_enable_control to controls because we don't want it to
* appear as an automatable parameter
*/
track_number_changed.connect_same_thread (*this, boost::bind (&Track::resync_track_name, this));
_session.config.ParameterChanged.connect_same_thread (*this, boost::bind (&Track::parameter_changed, this, _1));
return 0;
}
void
Track::use_new_diskstream ()
{
boost::shared_ptr<Diskstream> ds = create_diskstream ();
ds->do_refill_with_alloc ();
ds->set_block_size (_session.get_block_size ());
ds->playlist()->set_orig_track_id (id());
set_diskstream (ds);
}
XMLNode&
Track::get_state ()
{
return state (true);
}
XMLNode&
Track::state (bool full)
{
XMLNode& root (Route::state (full));
root.add_property (X_("monitoring"), enum_2_string (_monitoring));
root.add_property (X_("saved-meter-point"), enum_2_string (_saved_meter_point));
root.add_child_nocopy (_rec_enable_control->get_state());
root.add_child_nocopy (_diskstream->get_state ());
return root;
}
int
Track::set_state (const XMLNode& node, int version)
{
if (Route::set_state (node, version)) {
return -1;
}
XMLNode* child;
if (version >= 3000) {
if ((child = find_named_node (node, X_("Diskstream"))) != 0) {
boost::shared_ptr<Diskstream> ds = diskstream_factory (*child);
ds->do_refill_with_alloc ();
set_diskstream (ds);
}
}
if (_diskstream) {
_diskstream->playlist()->set_orig_track_id (id());
}
/* set rec-enable control *AFTER* setting up diskstream, because it may
want to operate on the diskstream as it sets its own state
*/
XMLNodeList nlist = node.children();
for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
child = *niter;
XMLProperty* prop;
if (child->name() == Controllable::xml_node_name && (prop = child->property ("name")) != 0) {
if (prop->value() == X_("recenable")) {
_rec_enable_control->set_state (*child, version);
}
}
}
const XMLProperty* prop;
if ((prop = node.property (X_("monitoring"))) != 0) {
_monitoring = MonitorChoice (string_2_enum (prop->value(), _monitoring));
} else {
_monitoring = MonitorAuto;
}
if ((prop = node.property (X_("saved-meter-point"))) != 0) {
_saved_meter_point = MeterPoint (string_2_enum (prop->value(), _saved_meter_point));
} else {
_saved_meter_point = _meter_point;
}
return 0;
}
XMLNode&
Track::get_template ()
{
return state (false);
}
Track::FreezeRecord::~FreezeRecord ()
{
for (vector<FreezeRecordProcessorInfo*>::iterator i = processor_info.begin(); i != processor_info.end(); ++i) {
delete *i;
}
}
Track::FreezeState
Track::freeze_state() const
{
return _freeze_record.state;
}
Track::RecEnableControl::RecEnableControl (boost::shared_ptr<Track> t)
: AutomationControl (t->session(),
RecEnableAutomation,
ParameterDescriptor(Evoral::Parameter(RecEnableAutomation)),
boost::shared_ptr<AutomationList>(),
X_("recenable"))
, track (t)
{
boost::shared_ptr<AutomationList> gl(new AutomationList(Evoral::Parameter(RecEnableAutomation)));
set_list (gl);
}
void
Track::RecEnableControl::set_value (double val)
{
boost::shared_ptr<Track> t = track.lock ();
if (!t) {
return;
}
t->set_record_enabled (val >= 0.5 ? true : false, this);
}
double
Track::RecEnableControl::get_value () const
{
boost::shared_ptr<Track> t = track.lock ();
if (!t) {
return 0;
}
return (t->record_enabled() ? 1.0 : 0.0);
}
bool
Track::record_enabled () const
{
return _diskstream && _diskstream->record_enabled ();
}
bool
Track::can_record()
{
bool will_record = true;
for (PortSet::iterator i = _input->ports().begin(); i != _input->ports().end() && will_record; ++i) {
if (!i->connected())
will_record = false;
}
return will_record;
}
void
Track::prep_record_enabled (bool yn, void *src)
{
if (yn && record_safe ()) {
return;
}
if (!_session.writable()) {
return;
}
if (_freeze_record.state == Frozen) {
return;
}
if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_recenable()) {
_route_group->apply (&Track::prep_record_enabled, yn, _route_group);
return;
}
/* keep track of the meter point as it was before we rec-enabled */
if (!_diskstream->record_enabled()) {
_saved_meter_point = _meter_point;
}
bool will_follow;
if (yn) {
will_follow = _diskstream->prep_record_enable ();
} else {
will_follow = _diskstream->prep_record_disable ();
}
if (will_follow) {
if (yn) {
if (_meter_point != MeterCustom) {
set_meter_point (MeterInput);
}
} else {
set_meter_point (_saved_meter_point);
}
}
}
void
Track::set_record_enabled (bool yn, void *src)
{
if (_diskstream->record_safe ()) {
return;
}
if (!_session.writable()) {
return;
}
if (_freeze_record.state == Frozen) {
return;
}
if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_recenable()) {
_route_group->apply (&Track::set_record_enabled, yn, _route_group);
return;
}
_diskstream->set_record_enabled (yn);
_rec_enable_control->Changed ();
}
bool
Track::record_safe () const
{
return _diskstream && _diskstream->record_safe ();
}
void
Track::set_record_safe (bool yn, void *src)
{
if (!_session.writable()) { /* REQUIRES REVIEW */
return;
}
if (_freeze_record.state == Frozen) { /* REQUIRES REVIEW */
return;
}
if (_route_group && src != _route_group && _route_group->is_active() && _route_group->is_recenable()) {
_route_group->apply (&Track::set_record_safe, yn, _route_group);
return;
}
_diskstream->set_record_safe (yn);
}
void
Track::parameter_changed (string const & p)
{
if (p == "track-name-number") {
resync_track_name ();
}
else if (p == "track-name-take") {
resync_track_name ();
}
else if (p == "take-name") {
if (_session.config.get_track_name_take()) {
resync_track_name ();
}
}
}
void
Track::resync_track_name ()
{
set_name(name());
}
bool
Track::set_name (const string& str)
{
bool ret;
if (record_enabled() && _session.actively_recording()) {
/* this messes things up if done while recording */
return false;
}
string diskstream_name = "";
if (_session.config.get_track_name_take () && !_session.config.get_take_name ().empty()) {
// Note: any text is fine, legalize_for_path() fixes this later
diskstream_name += _session.config.get_take_name ();
diskstream_name += "_";
}
const int64_t tracknumber = track_number();
if (tracknumber > 0 && _session.config.get_track_name_number()) {
char num[64], fmt[10];
snprintf(fmt, sizeof(fmt), "%%0%d" PRId64, _session.track_number_decimals());
snprintf(num, sizeof(num), fmt, tracknumber);
diskstream_name += num;
diskstream_name += "_";
}
diskstream_name += str;
if (diskstream_name == _diskstream_name) {
return true;
}
_diskstream_name = diskstream_name;
_diskstream->set_write_source_name (diskstream_name);
boost::shared_ptr<Track> me = boost::dynamic_pointer_cast<Track> (shared_from_this ());
if (_diskstream->playlist()->all_regions_empty () && _session.playlists->playlists_for_track (me).size() == 1) {
/* Only rename the diskstream (and therefore the playlist) if
a) the playlist has never had a region added to it and
b) there is only one playlist for this track.
If (a) is not followed, people can get confused if, say,
they have notes about a playlist with a given name and then
it changes (see mantis #4759).
If (b) is not followed, we rename the current playlist and not
the other ones, which is a bit confusing (see mantis #4977).
*/
_diskstream->set_name (str);
}
/* save state so that the statefile fully reflects any filename changes */
if ((ret = Route::set_name (str)) == 0) {
_session.save_state ("");
}
return ret;
}
void
Track::set_latency_compensation (framecnt_t longest_session_latency)
{
Route::set_latency_compensation (longest_session_latency);
_diskstream->set_roll_delay (_roll_delay);
}
int
Track::no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool session_state_changing)
{
Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
if (!lm.locked()) {
return 0;
}
bool can_record = _session.actively_recording ();
/* no outputs? nothing to do ... what happens if we have sends etc. ? */
if (n_outputs().n_total() == 0) {
return 0;
}
/* not active ... do the minimum possible by just outputting silence */
if (!_active) {
silence (nframes);
if (_meter_point == MeterInput && (_monitoring & MonitorInput || _diskstream->record_enabled())) {
_meter->reset();
}
return 0;
}
if (session_state_changing) {
if (_session.transport_speed() != 0.0f) {
/* we're rolling but some state is changing (e.g. our diskstream contents)
so we cannot use them. Be silent till this is over. Don't declick.
XXX note the absurdity of ::no_roll() being called when we ARE rolling!
*/
passthru_silence (start_frame, end_frame, nframes, 0);
return 0;
}
/* we're really not rolling, so we're either delivery silence or actually
monitoring, both of which are safe to do while session_state_changing is true.
*/
}
_diskstream->check_record_status (start_frame, can_record);
bool be_silent;
MonitorState const s = monitoring_state ();
/* we are not rolling, so be silent even if we are monitoring disk, as there
will be no disk data coming in.
*/
switch (s) {
case MonitoringSilence:
be_silent = true;
break;
case MonitoringDisk:
be_silent = true;
break;
case MonitoringInput:
be_silent = false;
break;
default:
be_silent = false;
break;
}
//if we have an internal generator, let it play regardless of monitoring state
if (_have_internal_generator) {
be_silent = false;
}
_amp->apply_gain_automation (false);
/* if have_internal_generator, or .. */
if (be_silent) {
if (_meter_point == MeterInput) {
/* still need input monitoring and metering */
bool const track_rec = _diskstream->record_enabled ();
bool const auto_input = _session.config.get_auto_input ();
bool const software_monitor = Config->get_monitoring_model() == SoftwareMonitoring;
bool const tape_machine_mode = Config->get_tape_machine_mode ();
bool no_meter = false;
/* this needs a proper K-map
* and should be separated into a function similar to monitoring_state()
* that also handles roll() states in audio_track.cc, midi_track.cc and route.cc
*
* see http://www.oofus.co.uk/ardour/Ardour3MonitorModesV3.pdf
*/
if (!auto_input && !track_rec) {
no_meter=true;
}
else if (tape_machine_mode && !track_rec && auto_input) {
no_meter=true;
}
else if (!software_monitor && tape_machine_mode && !track_rec) {
no_meter=true;
}
else if (!software_monitor && !tape_machine_mode && !track_rec && !auto_input) {
no_meter=true;
}
if (no_meter) {
BufferSet& bufs (_session.get_silent_buffers (n_process_buffers()));
_meter->run (bufs, 0, 0, nframes, true);
_input->process_input (boost::shared_ptr<Processor>(), start_frame, end_frame, nframes);
} else {
_input->process_input (_meter, start_frame, end_frame, nframes);
}
}
passthru_silence (start_frame, end_frame, nframes, 0);
} else {
BufferSet& bufs = _session.get_route_buffers (n_process_buffers());
fill_buffers_with_input (bufs, _input, nframes);
if (_meter_point == MeterInput) {
_meter->run (bufs, start_frame, end_frame, nframes, true);
}
passthru (bufs, start_frame, end_frame, nframes, false);
}
for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery> (*i);
if (d) {
d->flush_buffers (nframes);
}
}
return 0;
}
int
Track::silent_roll (pframes_t nframes, framepos_t /*start_frame*/, framepos_t /*end_frame*/, bool& need_butler)
{
Glib::Threads::RWLock::ReaderLock lm (_processor_lock, Glib::Threads::TRY_LOCK);
if (!lm.locked()) {
framecnt_t playback_distance = _diskstream->calculate_playback_distance(nframes);
if (can_internal_playback_seek(playback_distance)) {
internal_playback_seek(playback_distance);
}
return 0;
}
if (n_outputs().n_total() == 0 && _processors.empty()) {
return 0;
}
if (!_active) {
silence (nframes);
return 0;
}
_silent = true;
_amp->apply_gain_automation(false);
silence (nframes);
framecnt_t playback_distance;
BufferSet& bufs (_session.get_route_buffers (n_process_buffers(), true));
int const dret = _diskstream->process (bufs, _session.transport_frame(), nframes, playback_distance, false);
need_butler = _diskstream->commit (playback_distance);
return dret;
}
void
Track::set_diskstream (boost::shared_ptr<Diskstream> ds)
{
_diskstream = ds;
ds->PlaylistChanged.connect_same_thread (*this, boost::bind (&Track::diskstream_playlist_changed, this));
diskstream_playlist_changed ();
ds->RecordEnableChanged.connect_same_thread (*this, boost::bind (&Track::diskstream_record_enable_changed, this));
ds->RecordSafeChanged.connect_same_thread (*this, boost::bind (&Track::diskstream_record_safe_changed, this));
ds->SpeedChanged.connect_same_thread (*this, boost::bind (&Track::diskstream_speed_changed, this));
ds->AlignmentStyleChanged.connect_same_thread (*this, boost::bind (&Track::diskstream_alignment_style_changed, this));
}
void
Track::diskstream_playlist_changed ()
{
PlaylistChanged (); /* EMIT SIGNAL */
}
void
Track::diskstream_record_enable_changed ()
{
RecordEnableChanged (); /* EMIT SIGNAL */
}
void
Track::diskstream_record_safe_changed ()
{
RecordSafeChanged (); /* EMIT SIGNAL */
}
void
Track::diskstream_speed_changed ()
{
SpeedChanged (); /* EMIT SIGNAL */
}
void
Track::diskstream_alignment_style_changed ()
{
AlignmentStyleChanged (); /* EMIT SIGNAL */
}
boost::shared_ptr<Playlist>
Track::playlist ()
{
return _diskstream->playlist ();
}
void
Track::request_input_monitoring (bool m)
{
_diskstream->request_input_monitoring (m);
}
void
Track::ensure_input_monitoring (bool m)
{
_diskstream->ensure_input_monitoring (m);
}
bool
Track::destructive () const
{
return _diskstream->destructive ();
}
list<boost::shared_ptr<Source> > &
Track::last_capture_sources ()
{
return _diskstream->last_capture_sources ();
}
void
Track::set_capture_offset ()
{
_diskstream->set_capture_offset ();
}
std::string
Track::steal_write_source_name()
{
return _diskstream->steal_write_source_name ();
}
void
Track::reset_write_sources (bool r, bool force)
{
_diskstream->reset_write_sources (r, force);
}
float
Track::playback_buffer_load () const
{
return _diskstream->playback_buffer_load ();
}
float
Track::capture_buffer_load () const
{
return _diskstream->capture_buffer_load ();
}
int
Track::do_refill ()
{
return _diskstream->do_refill ();
}
int
Track::do_flush (RunContext c, bool force)
{
return _diskstream->do_flush (c, force);
}
void
Track::set_pending_overwrite (bool o)
{
_diskstream->set_pending_overwrite (o);
}
int
Track::seek (framepos_t p, bool complete_refill)
{
return _diskstream->seek (p, complete_refill);
}
bool
Track::hidden () const
{
return _diskstream->hidden ();
}
int
Track::can_internal_playback_seek (framecnt_t p)
{
return _diskstream->can_internal_playback_seek (p);
}
int
Track::internal_playback_seek (framecnt_t p)
{
return _diskstream->internal_playback_seek (p);
}
void
Track::non_realtime_input_change ()
{
_diskstream->non_realtime_input_change ();
}
void
Track::non_realtime_locate (framepos_t p)
{
Route::non_realtime_locate (p);
if (!hidden()) {
/* don't waste i/o cycles and butler calls
for hidden (secret) tracks
*/
_diskstream->non_realtime_locate (p);
}
}
void
Track::non_realtime_set_speed ()
{
_diskstream->non_realtime_set_speed ();
}
int
Track::overwrite_existing_buffers ()
{
return _diskstream->overwrite_existing_buffers ();
}
framecnt_t
Track::get_captured_frames (uint32_t n) const
{
return _diskstream->get_captured_frames (n);
}
int
Track::set_loop (Location* l)
{
return _diskstream->set_loop (l);
}
void
Track::transport_looped (framepos_t p)
{
_diskstream->transport_looped (p);
}
bool
Track::realtime_set_speed (double s, bool g)
{
return _diskstream->realtime_set_speed (s, g);
}
void
Track::transport_stopped_wallclock (struct tm & n, time_t t, bool g)
{
_diskstream->transport_stopped_wallclock (n, t, g);
}
bool
Track::pending_overwrite () const
{
return _diskstream->pending_overwrite ();
}
double
Track::speed () const
{
return _diskstream->speed ();
}
void
Track::prepare_to_stop (framepos_t t, framepos_t a)
{
_diskstream->prepare_to_stop (t, a);
}
void
Track::set_slaved (bool s)
{
_diskstream->set_slaved (s);
}
ChanCount
Track::n_channels ()
{
return _diskstream->n_channels ();
}
framepos_t
Track::get_capture_start_frame (uint32_t n) const
{
return _diskstream->get_capture_start_frame (n);
}
AlignStyle
Track::alignment_style () const
{
return _diskstream->alignment_style ();
}
AlignChoice
Track::alignment_choice () const
{
return _diskstream->alignment_choice ();
}
framepos_t
Track::current_capture_start () const
{
return _diskstream->current_capture_start ();
}
framepos_t
Track::current_capture_end () const
{
return _diskstream->current_capture_end ();
}
void
Track::playlist_modified ()
{
_diskstream->playlist_modified ();
}
int
Track::use_playlist (boost::shared_ptr<Playlist> p)
{
int ret = _diskstream->use_playlist (p);
if (ret == 0) {
p->set_orig_track_id (id());
}
return ret;
}
int
Track::use_copy_playlist ()
{
int ret = _diskstream->use_copy_playlist ();
if (ret == 0) {
_diskstream->playlist()->set_orig_track_id (id());
}
return ret;
}
int
Track::use_new_playlist ()
{
int ret = _diskstream->use_new_playlist ();
if (ret == 0) {
_diskstream->playlist()->set_orig_track_id (id());
}
return ret;
}
void
Track::set_align_style (AlignStyle s, bool force)
{
_diskstream->set_align_style (s, force);
}
void
Track::set_align_choice (AlignChoice s, bool force)
{
_diskstream->set_align_choice (s, force);
}
bool
Track::using_diskstream_id (PBD::ID id) const
{
return (id == _diskstream->id ());
}
void
Track::set_block_size (pframes_t n)
{
Route::set_block_size (n);
_diskstream->set_block_size (n);
}
void
Track::adjust_playback_buffering ()
{
if (_diskstream) {
_diskstream->adjust_playback_buffering ();
}
}
void
Track::adjust_capture_buffering ()
{
if (_diskstream) {
_diskstream->adjust_capture_buffering ();
}
}
#ifdef USE_TRACKS_CODE_FEATURES
/* This is the Tracks version of Track::monitoring_state().
*
* Ardour developers: try to flag or fix issues if parts of the libardour API
* change in ways that invalidate this
*/
MonitorState
Track::monitoring_state () const
{
/* Explicit requests */
if (_monitoring & MonitorInput) {
return MonitoringInput;
}
if (_monitoring & MonitorDisk) {
return MonitoringDisk;
}
/* This is an implementation of the truth table in doc/monitor_modes.pdf;
I don't think it's ever going to be too pretty too look at.
*/
// GZ: NOT USED IN TRACKS
//bool const auto_input = _session.config.get_auto_input ();
//bool const software_monitor = Config->get_monitoring_model() == SoftwareMonitoring;
//bool const tape_machine_mode = Config->get_tape_machine_mode ();
bool const roll = _session.transport_rolling ();
bool const track_rec = _diskstream->record_enabled ();
bool session_rec = _session.actively_recording ();
if (track_rec) {
if (!session_rec && roll) {
return MonitoringDisk;
} else {
return MonitoringInput;
}
} else {
if (roll) {
return MonitoringDisk;
}
}
return MonitoringSilence;
}
#else
/* This is the Ardour/Mixbus version of Track::monitoring_state().
*
* Tracks developers: do NOT modify this method under any circumstances.
*/
MonitorState
Track::monitoring_state () const
{
/* Explicit requests */
if (_monitoring & MonitorInput) {
return MonitoringInput;
}
if (_monitoring & MonitorDisk) {
return MonitoringDisk;
}
/* This is an implementation of the truth table in doc/monitor_modes.pdf;
I don't think it's ever going to be too pretty too look at.
*/
bool const roll = _session.transport_rolling ();
bool const track_rec = _diskstream->record_enabled ();
bool const auto_input = _session.config.get_auto_input ();
bool const software_monitor = Config->get_monitoring_model() == SoftwareMonitoring;
bool const tape_machine_mode = Config->get_tape_machine_mode ();
bool session_rec;
/* I suspect that just use actively_recording() is good enough all the
* time, but just to keep the semantics the same as they were before
* sept 26th 2012, we differentiate between the cases where punch is
* enabled and those where it is not.
*/
if (_session.config.get_punch_in() || _session.config.get_punch_out()) {
session_rec = _session.actively_recording ();
} else {
session_rec = _session.get_record_enabled();
}
if (track_rec) {
if (!session_rec && roll && auto_input) {
return MonitoringDisk;
} else {
return software_monitor ? MonitoringInput : MonitoringSilence;
}
} else {
if (tape_machine_mode) {
return MonitoringDisk;
} else {
if (!roll && auto_input) {
return software_monitor ? MonitoringInput : MonitoringSilence;
} else {
return MonitoringDisk;
}
}
}
abort(); /* NOTREACHED */
return MonitoringSilence;
}
#endif
void
Track::maybe_declick (BufferSet& bufs, framecnt_t nframes, int declick)
{
/* never declick if there is an internal generator - we just want it to
keep generating sound without interruption.
ditto if we are monitoring inputs.
*/
if (_have_internal_generator || monitoring_choice() == MonitorInput) {
return;
}
if (!declick) {
declick = _pending_declick;
}
if (declick != 0) {
Amp::declick (bufs, nframes, declick);
}
}
framecnt_t
Track::check_initial_delay (framecnt_t nframes, framepos_t& transport_frame)
{
if (_roll_delay > nframes) {
_roll_delay -= nframes;
silence_unlocked (nframes);
/* transport frame is not legal for caller to use */
return 0;
} else if (_roll_delay > 0) {
nframes -= _roll_delay;
silence_unlocked (_roll_delay);
transport_frame += _roll_delay;
/* shuffle all the port buffers for things that lead "out" of this Route
to reflect that we just wrote _roll_delay frames of silence.
*/
Glib::Threads::RWLock::ReaderLock lm (_processor_lock);
for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
boost::shared_ptr<IOProcessor> iop = boost::dynamic_pointer_cast<IOProcessor> (*i);
if (iop) {
iop->increment_port_buffer_offset (_roll_delay);
}
}
_output->increment_port_buffer_offset (_roll_delay);
_roll_delay = 0;
}
return nframes;
}
void
Track::set_monitoring (MonitorChoice mc)
{
if (mc != _monitoring) {
_monitoring = mc;
for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
(*i)->monitoring_changed ();
}
MonitoringChanged (); /* EMIT SIGNAL */
}
}
MeterState
Track::metering_state () const
{
bool rv;
if (_session.transport_rolling ()) {
// audio_track.cc || midi_track.cc roll() runs meter IFF:
rv = _meter_point == MeterInput && (_monitoring & MonitorInput || _diskstream->record_enabled());
} else {
// track no_roll() always metering if
rv = _meter_point == MeterInput;
}
return rv ? MeteringInput : MeteringRoute;
}