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livetrax/libs/ardour/source.cc
Paul Davis 7a03f1c3e6 do not try to open sources with write-permission if the session itself is unwritable
git-svn-id: svn://localhost/ardour2/branches/3.0@8633 d708f5d6-7413-0410-9779-e7cbd77b26cf
2011-01-31 19:02:15 +00:00

311 lines
6.2 KiB
C++

/*
Copyright (C) 2000 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 <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <float.h>
#include <cerrno>
#include <ctime>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <fstream>
#include <glibmm/thread.h>
#include <glibmm/miscutils.h>
#include <glibmm/fileutils.h>
#include "pbd/xml++.h"
#include "pbd/pthread_utils.h"
#include "pbd/enumwriter.h"
#include "ardour/debug.h"
#include "ardour/session.h"
#include "ardour/source.h"
#include "ardour/transient_detector.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
Source::Source (Session& s, DataType type, const string& name, Flag flags)
: SessionObject(s, name)
, _type(type)
, _flags(flags)
, _timeline_position(0)
, _use_count (0)
{
_analysed = false;
_timestamp = 0;
fix_writable_flags ();
}
Source::Source (Session& s, const XMLNode& node)
: SessionObject(s, "unnamed source")
, _type(DataType::AUDIO)
, _flags (Flag (Writable|CanRename))
, _timeline_position(0)
, _use_count (0)
{
_timestamp = 0;
_analysed = false;
if (set_state (node, Stateful::loading_state_version) || _type == DataType::NIL) {
throw failed_constructor();
}
fix_writable_flags ();
}
Source::~Source ()
{
DEBUG_TRACE (DEBUG::Destruction, string_compose ("Source %1 destructor %2\n", _name, this));
}
void
Source::fix_writable_flags ()
{
if (!_session.writable()) {
_flags = Flag (_flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy|CanRename));
}
}
XMLNode&
Source::get_state ()
{
XMLNode *node = new XMLNode ("Source");
char buf[64];
node->add_property ("name", name());
node->add_property ("type", _type.to_string());
node->add_property (X_("flags"), enum_2_string (_flags));
_id.print (buf, sizeof (buf));
node->add_property ("id", buf);
if (_timestamp != 0) {
snprintf (buf, sizeof (buf), "%ld", _timestamp);
node->add_property ("timestamp", buf);
}
return *node;
}
int
Source::set_state (const XMLNode& node, int version)
{
const XMLProperty* prop;
if ((prop = node.property ("name")) != 0) {
_name = prop->value();
} else {
return -1;
}
if ((prop = node.property ("id")) != 0) {
_id = prop->value ();
} else {
return -1;
}
if ((prop = node.property ("type")) != 0) {
_type = DataType(prop->value());
}
if ((prop = node.property ("timestamp")) != 0) {
sscanf (prop->value().c_str(), "%ld", &_timestamp);
}
if ((prop = node.property (X_("flags"))) != 0) {
_flags = Flag (string_2_enum (prop->value(), _flags));
} else {
_flags = Flag (0);
}
/* old style, from the period when we had DestructiveFileSource */
if ((prop = node.property (X_("destructive"))) != 0) {
_flags = Flag (_flags | Destructive);
}
if (version < 3000) {
/* a source with an XML node must necessarily already exist,
and therefore cannot be removable/writable etc. etc.; 2.X
sometimes marks sources as removable which shouldn't be.
*/
if (!(_flags & Destructive)) {
_flags = Flag (_flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy|CanRename));
}
}
return 0;
}
bool
Source::has_been_analysed() const
{
Glib::Mutex::Lock lm (_analysis_lock);
return _analysed;
}
void
Source::set_been_analysed (bool yn)
{
{
Glib::Mutex::Lock lm (_analysis_lock);
_analysed = yn;
}
if (yn) {
load_transients (get_transients_path());
AnalysisChanged(); // EMIT SIGNAL
}
}
int
Source::load_transients (const string& path)
{
ifstream file (path.c_str());
if (!file) {
return -1;
}
transients.clear ();
stringstream strstr;
double val;
while (file.good()) {
file >> val;
if (!file.fail()) {
framepos_t frame = (framepos_t) floor (val * _session.frame_rate());
transients.push_back (frame);
}
}
return 0;
}
string
Source::get_transients_path () const
{
vector<string> parts;
string s;
/* old sessions may not have the analysis directory */
_session.ensure_subdirs ();
s = _session.analysis_dir ();
parts.push_back (s);
s = _id.to_s();
s += '.';
s += TransientDetector::operational_identifier();
parts.push_back (s);
return Glib::build_filename (parts);
}
bool
Source::check_for_analysis_data_on_disk ()
{
/* looks to see if the analysis files for this source are on disk.
if so, mark us already analysed.
*/
string path = get_transients_path ();
bool ok = true;
if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
ok = false;
}
// XXX add other tests here as appropriate
set_been_analysed (ok);
return ok;
}
void
Source::mark_for_remove ()
{
// This operation is not allowed for sources for destructive tracks or out-of-session files.
/* XXX need a way to detect _within_session() condition here - move it from FileSource?
*/
if ((_flags & Destructive)) {
return;
}
_flags = Flag (_flags | Removable | RemoveAtDestroy);
}
void
Source::set_timeline_position (int64_t pos)
{
_timeline_position = pos;
}
void
Source::set_allow_remove_if_empty (bool yn)
{
if (!writable()) {
return;
}
if (yn) {
_flags = Flag (_flags | RemovableIfEmpty);
} else {
_flags = Flag (_flags & ~RemovableIfEmpty);
}
}
void
Source::inc_use_count ()
{
g_atomic_int_inc (&_use_count);
}
void
Source::dec_use_count ()
{
#ifndef NDEBUG
gint oldval = g_atomic_int_exchange_and_add (&_use_count, -1);
if (oldval <= 0) {
cerr << "Bad use dec for " << name() << endl;
abort ();
}
assert (oldval > 0);
#else
g_atomic_int_exchange_and_add (&_use_count, -1);
#endif
}
bool
Source::writable () const
{
return (_flags & Writable) && _session.writable();
}