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livetrax/libs/ardour/diskstream.cc
Carl Hetherington a2897ecef6 Fairly major change to the way in which crossfades are handled; 
they are now done with region fades, rather than separate objects.
After this commit, Ardour will try to convert your session files
to the new crossfade format, but will make a backup in your
session folder first.

If you have works in progress using Ardour 3 it is
***STRONGLY RECOMMENDED*** that you back up session files before
updating to this commit.


git-svn-id: svn://localhost/ardour2/branches/3.0@11986 d708f5d6-7413-0410-9779-e7cbd77b26cf
2012-04-16 16:32:22 +00:00

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/*
Copyright (C) 2000-2006 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 <fstream>
#include <cassert>
#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 <glibmm/thread.h>
#include "pbd/error.h"
#include "pbd/basename.h"
#include "pbd/memento_command.h"
#include "pbd/xml++.h"
#include "pbd/stacktrace.h"
#include "ardour/ardour.h"
#include "ardour/audioengine.h"
#include "ardour/debug.h"
#include "ardour/diskstream.h"
#include "ardour/utils.h"
#include "ardour/configuration.h"
#include "ardour/audiofilesource.h"
#include "ardour/send.h"
#include "ardour/pannable.h"
#include "ardour/panner_shell.h"
#include "ardour/playlist.h"
#include "ardour/cycle_timer.h"
#include "ardour/region.h"
#include "ardour/panner.h"
#include "ardour/session.h"
#include "ardour/io.h"
#include "ardour/track.h"
#include "i18n.h"
#include <locale.h>
using namespace std;
using namespace ARDOUR;
using namespace PBD;
/* XXX This goes uninitialized when there is no ~/.config/ardour3 directory.
* I can't figure out why, so this will do for now (just stole the
* default from configuration_vars.h). 0 is not a good value for
* allocating buffer sizes..
*/
ARDOUR::framecnt_t Diskstream::disk_io_chunk_frames = 1024 * 256 / sizeof (Sample);
PBD::Signal0<void> Diskstream::DiskOverrun;
PBD::Signal0<void> Diskstream::DiskUnderrun;
Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
: SessionObject(sess, name)
, i_am_the_modifier (0)
, _track (0)
, _record_enabled (0)
, _visible_speed (1.0f)
, _actual_speed (1.0f)
, _buffer_reallocation_required (false)
, _seek_required (false)
, capture_start_frame (0)
, capture_captured (0)
, was_recording (false)
, adjust_capture_position (0)
, _capture_offset (0)
, _roll_delay (0)
, first_recordable_frame (max_framepos)
, last_recordable_frame (max_framepos)
, last_possibly_recording (0)
, _alignment_style (ExistingMaterial)
, _alignment_choice (Automatic)
, _slaved (false)
, loop_location (0)
, overwrite_frame (0)
, overwrite_offset (0)
, _pending_overwrite (false)
, overwrite_queued (false)
, wrap_buffer_size (0)
, speed_buffer_size (0)
, _speed (1.0)
, _target_speed (_speed)
, file_frame (0)
, playback_sample (0)
, in_set_state (false)
, _flags (flag)
, deprecated_io_node (0)
{
}
Diskstream::Diskstream (Session& sess, const XMLNode& /*node*/)
: SessionObject(sess, "unnamed diskstream")
, i_am_the_modifier (0)
, _track (0)
, _record_enabled (0)
, _visible_speed (1.0f)
, _actual_speed (1.0f)
, _buffer_reallocation_required (false)
, _seek_required (false)
, capture_start_frame (0)
, capture_captured (0)
, was_recording (false)
, adjust_capture_position (0)
, _capture_offset (0)
, _roll_delay (0)
, first_recordable_frame (max_framepos)
, last_recordable_frame (max_framepos)
, last_possibly_recording (0)
, _alignment_style (ExistingMaterial)
, _alignment_choice (Automatic)
, _slaved (false)
, loop_location (0)
, overwrite_frame (0)
, overwrite_offset (0)
, _pending_overwrite (false)
, overwrite_queued (false)
, wrap_buffer_size (0)
, speed_buffer_size (0)
, _speed (1.0)
, _target_speed (_speed)
, file_frame (0)
, playback_sample (0)
, in_set_state (false)
, _flags (Recordable)
, deprecated_io_node (0)
{
}
Diskstream::~Diskstream ()
{
DEBUG_TRACE (DEBUG::Destruction, string_compose ("Diskstream %1 deleted\n", _name));
if (_playlist) {
_playlist->release ();
}
delete deprecated_io_node;
}
void
Diskstream::set_track (Track* t)
{
_track = t;
_io = _track->input();
ic_connection.disconnect();
_io->changed.connect_same_thread (ic_connection, boost::bind (&Diskstream::handle_input_change, this, _1, _2));
if (_io->n_ports() != ChanCount::ZERO) {
input_change_pending.type = IOChange::Type (IOChange::ConfigurationChanged|IOChange::ConnectionsChanged);
non_realtime_input_change ();
}
_track->Destroyed.connect_same_thread (*this, boost::bind (&Diskstream::route_going_away, this));
}
void
Diskstream::handle_input_change (IOChange change, void * /*src*/)
{
Glib::Mutex::Lock lm (state_lock);
if (change.type & (IOChange::ConfigurationChanged|IOChange::ConnectionsChanged)) {
/* rather than handle this here on a DS-by-DS basis we defer to the
session transport/butler thread, and let it tackle
as many diskstreams as need it in one shot. this avoids many repeated
takings of the audioengine process lock.
*/
if (!(input_change_pending.type & change.type)) {
input_change_pending.type = IOChange::Type (input_change_pending.type | change.type);
_session.request_input_change_handling ();
}
}
}
void
Diskstream::non_realtime_set_speed ()
{
if (_buffer_reallocation_required)
{
Glib::Mutex::Lock lm (state_lock);
allocate_temporary_buffers ();
_buffer_reallocation_required = false;
}
if (_seek_required) {
if (speed() != 1.0f || speed() != -1.0f) {
seek ((framepos_t) (_session.transport_frame() * (double) speed()), true);
}
else {
seek (_session.transport_frame(), true);
}
_seek_required = false;
}
}
bool
Diskstream::realtime_set_speed (double sp, bool global)
{
bool changed = false;
double new_speed = sp * _session.transport_speed();
if (_visible_speed != sp) {
_visible_speed = sp;
changed = true;
}
if (new_speed != _actual_speed) {
framecnt_t required_wrap_size = (framecnt_t) floor (_session.get_block_size() *
fabs (new_speed)) + 1;
if (required_wrap_size > wrap_buffer_size) {
_buffer_reallocation_required = true;
}
_actual_speed = new_speed;
_target_speed = fabs(_actual_speed);
}
if (changed) {
if (!global) {
_seek_required = true;
}
SpeedChanged (); /* EMIT SIGNAL */
}
return _buffer_reallocation_required || _seek_required;
}
void
Diskstream::set_capture_offset ()
{
if (_io == 0) {
/* can't capture, so forget it */
return;
}
_capture_offset = _io->latency();
DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1: using IO latency, capture offset set to %2\n", name(), _capture_offset));
}
void
Diskstream::set_align_style (AlignStyle a, bool force)
{
if (record_enabled() && _session.actively_recording()) {
return;
}
if ((a != _alignment_style) || force) {
_alignment_style = a;
AlignmentStyleChanged ();
}
}
void
Diskstream::set_align_choice (AlignChoice a, bool force)
{
if (record_enabled() && _session.actively_recording()) {
return;
}
if ((a != _alignment_choice) || force) {
_alignment_choice = a;
switch (_alignment_choice) {
case Automatic:
set_align_style_from_io ();
break;
case UseExistingMaterial:
set_align_style (ExistingMaterial);
break;
case UseCaptureTime:
set_align_style (CaptureTime);
break;
}
}
}
int
Diskstream::set_loop (Location *location)
{
if (location) {
if (location->start() >= location->end()) {
error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
return -1;
}
}
loop_location = location;
LoopSet (location); /* EMIT SIGNAL */
return 0;
}
/** Get the start position (in session frames) of the nth capture in the current pass */
ARDOUR::framepos_t
Diskstream::get_capture_start_frame (uint32_t n) const
{
Glib::Mutex::Lock lm (capture_info_lock);
if (capture_info.size() > n) {
/* this is a completed capture */
return capture_info[n]->start;
} else {
/* this is the currently in-progress capture */
return capture_start_frame;
}
}
ARDOUR::framecnt_t
Diskstream::get_captured_frames (uint32_t n) const
{
Glib::Mutex::Lock lm (capture_info_lock);
if (capture_info.size() > n) {
/* this is a completed capture */
return capture_info[n]->frames;
} else {
/* this is the currently in-progress capture */
return capture_captured;
}
}
void
Diskstream::set_roll_delay (ARDOUR::framecnt_t nframes)
{
_roll_delay = nframes;
}
int
Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
{
if (!playlist) {
return 0;
}
bool prior_playlist = false;
{
Glib::Mutex::Lock lm (state_lock);
if (playlist == _playlist) {
return 0;
}
playlist_connections.drop_connections ();
if (_playlist) {
_playlist->release();
prior_playlist = true;
}
_playlist = playlist;
_playlist->use();
if (!in_set_state && recordable()) {
reset_write_sources (false);
}
_playlist->ContentsChanged.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_modified, this));
_playlist->DropReferences.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_deleted, this, boost::weak_ptr<Playlist>(_playlist)));
_playlist->RangesMoved.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_ranges_moved, this, _1, _2));
}
/* don't do this if we've already asked for it *or* if we are setting up
the diskstream for the very first time - the input changed handling will
take care of the buffer refill.
*/
if (!overwrite_queued && prior_playlist) {
_session.request_overwrite_buffer (_track);
overwrite_queued = true;
}
PlaylistChanged (); /* EMIT SIGNAL */
_session.set_dirty ();
return 0;
}
void
Diskstream::playlist_changed (const PropertyChange&)
{
playlist_modified ();
}
void
Diskstream::playlist_modified ()
{
if (!i_am_the_modifier && !overwrite_queued) {
_session.request_overwrite_buffer (_track);
overwrite_queued = true;
}
}
void
Diskstream::playlist_deleted (boost::weak_ptr<Playlist> wpl)
{
boost::shared_ptr<Playlist> pl (wpl.lock());
if (pl == _playlist) {
/* this catches an ordering issue with session destruction. playlists
are destroyed before diskstreams. we have to invalidate any handles
we have to the playlist.
*/
if (_playlist) {
_playlist.reset ();
}
}
}
bool
Diskstream::set_name (const string& str)
{
if (_name != str) {
assert(playlist());
playlist()->set_name (str);
SessionObject::set_name(str);
}
return true;
}
XMLNode&
Diskstream::get_state ()
{
XMLNode* node = new XMLNode ("Diskstream");
char buf[64];
LocaleGuard lg (X_("POSIX"));
node->add_property ("flags", enum_2_string (_flags));
node->add_property ("playlist", _playlist->name());
node->add_property("name", _name);
id().print (buf, sizeof (buf));
node->add_property("id", buf);
snprintf (buf, sizeof(buf), "%f", _visible_speed);
node->add_property ("speed", buf);
node->add_property ("capture-alignment", enum_2_string (_alignment_choice));
if (_extra_xml) {
node->add_child_copy (*_extra_xml);
}
return *node;
}
int
Diskstream::set_state (const XMLNode& node, int /*version*/)
{
const XMLProperty* prop;
if ((prop = node.property ("name")) != 0) {
_name = prop->value();
}
if (deprecated_io_node) {
set_id (*deprecated_io_node);
} else {
set_id (node);
}
if ((prop = node.property ("flags")) != 0) {
_flags = Flag (string_2_enum (prop->value(), _flags));
}
if ((prop = node.property (X_("capture-alignment"))) != 0) {
set_align_choice (AlignChoice (string_2_enum (prop->value(), _alignment_choice)), true);
} else {
set_align_choice (Automatic, true);
}
if ((prop = node.property ("playlist")) == 0) {
return -1;
}
if (find_and_use_playlist (prop->value())) {
return -1;
}
if ((prop = node.property ("speed")) != 0) {
double sp = atof (prop->value().c_str());
if (realtime_set_speed (sp, false)) {
non_realtime_set_speed ();
}
}
return 0;
}
void
Diskstream::playlist_ranges_moved (list< Evoral::RangeMove<framepos_t> > const & movements_frames, bool from_undo)
{
/* If we're coming from an undo, it will have handled
automation undo (it must, since automation-follows-regions
can lose automation data). Hence we can do nothing here.
*/
if (from_undo) {
return;
}
if (!_track || Config->get_automation_follows_regions () == false) {
return;
}
list< Evoral::RangeMove<double> > movements;
for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin();
i != movements_frames.end();
++i) {
movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
}
/* move panner automation */
boost::shared_ptr<Pannable> pannable = _track->pannable();
Evoral::ControlSet::Controls& c (pannable->controls());
for (Evoral::ControlSet::Controls::iterator ci = c.begin(); ci != c.end(); ++ci) {
boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl>(ci->second);
if (!ac) {
continue;
}
boost::shared_ptr<AutomationList> alist = ac->alist();
XMLNode & before = alist->get_state ();
bool const things_moved = alist->move_ranges (movements);
if (things_moved) {
_session.add_command (new MementoCommand<AutomationList> (
*alist.get(), &before, &alist->get_state ()));
}
}
/* move processor automation */
_track->foreach_processor (boost::bind (&Diskstream::move_processor_automation, this, _1, movements_frames));
}
void
Diskstream::move_processor_automation (boost::weak_ptr<Processor> p, list< Evoral::RangeMove<framepos_t> > const & movements_frames)
{
boost::shared_ptr<Processor> processor (p.lock ());
if (!processor) {
return;
}
list< Evoral::RangeMove<double> > movements;
for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin(); i != movements_frames.end(); ++i) {
movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
}
set<Evoral::Parameter> const a = processor->what_can_be_automated ();
for (set<Evoral::Parameter>::iterator i = a.begin (); i != a.end (); ++i) {
boost::shared_ptr<AutomationList> al = processor->automation_control(*i)->alist();
XMLNode & before = al->get_state ();
bool const things_moved = al->move_ranges (movements);
if (things_moved) {
_session.add_command (
new MementoCommand<AutomationList> (
*al.get(), &before, &al->get_state ()
)
);
}
}
}
void
Diskstream::check_record_status (framepos_t transport_frame, bool can_record)
{
int possibly_recording;
int rolling;
int change;
const int transport_rolling = 0x4;
const int track_rec_enabled = 0x2;
const int global_rec_enabled = 0x1;
const int fully_rec_enabled = (transport_rolling|track_rec_enabled|global_rec_enabled);
/* merge together the 3 factors that affect record status, and compute
what has changed.
*/
rolling = _session.transport_speed() != 0.0f;
possibly_recording = (rolling << 2) | (record_enabled() << 1) | can_record;
change = possibly_recording ^ last_possibly_recording;
if (possibly_recording == last_possibly_recording) {
return;
}
framecnt_t existing_material_offset = _session.worst_playback_latency();
if (possibly_recording == fully_rec_enabled) {
if (last_possibly_recording == fully_rec_enabled) {
return;
}
capture_start_frame = _session.transport_frame();
first_recordable_frame = capture_start_frame + _capture_offset;
last_recordable_frame = max_framepos;
DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1: @ %7 (%9) FRF = %2 CSF = %4 CO = %5, EMO = %6 RD = %8 WOL %10 WTL %11\n",
name(), first_recordable_frame, last_recordable_frame, capture_start_frame,
_capture_offset,
existing_material_offset,
transport_frame,
_roll_delay,
_session.transport_frame(),
_session.worst_output_latency(),
_session.worst_track_latency()));
if (_alignment_style == ExistingMaterial) {
first_recordable_frame += existing_material_offset;
DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("\tshift FRF by EMO %1\n",
first_recordable_frame));
}
prepare_record_status (capture_start_frame);
} else {
if (last_possibly_recording == fully_rec_enabled) {
/* we were recording last time */
if (change & transport_rolling) {
/* transport-change (stopped rolling): last_recordable_frame was set in ::prepare_to_stop(). We
had to set it there because we likely rolled past the stopping point to declick out,
and then backed up.
*/
} else {
/* punch out */
last_recordable_frame = _session.transport_frame() + _capture_offset;
if (_alignment_style == ExistingMaterial) {
last_recordable_frame += existing_material_offset;
}
}
}
}
last_possibly_recording = possibly_recording;
}
void
Diskstream::route_going_away ()
{
_io.reset ();
}
void
Diskstream::calculate_record_range (Evoral::OverlapType ot, framepos_t transport_frame, framecnt_t nframes,
framecnt_t & rec_nframes, framecnt_t & rec_offset)
{
switch (ot) {
case Evoral::OverlapNone:
rec_nframes = 0;
break;
case Evoral::OverlapInternal:
/* ---------- recrange
|---| transrange
*/
rec_nframes = nframes;
rec_offset = 0;
break;
case Evoral::OverlapStart:
/* |--------| recrange
-----| transrange
*/
rec_nframes = transport_frame + nframes - first_recordable_frame;
if (rec_nframes) {
rec_offset = first_recordable_frame - transport_frame;
}
break;
case Evoral::OverlapEnd:
/* |--------| recrange
|-------- transrange
*/
rec_nframes = last_recordable_frame - transport_frame;
rec_offset = 0;
break;
case Evoral::OverlapExternal:
/* |--------| recrange
-------------- transrange
*/
rec_nframes = last_recordable_frame - first_recordable_frame;
rec_offset = first_recordable_frame - transport_frame;
break;
}
DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1 rec? %2 @ %3 (for %4) FRF %5 LRF %6 : rf %7 @ %8\n",
_name, enum_2_string (ot), transport_frame, nframes,
first_recordable_frame, last_recordable_frame, rec_nframes, rec_offset));
}
void
Diskstream::prepare_to_stop (framepos_t pos)
{
last_recordable_frame = pos + _capture_offset;
}
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