libs/ardour/source.cc

   1 /*
   2     Copyright (C) 2000 Paul Davis
   3
   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.
   8
   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.
  13
  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.
  17
  18 */
  19
  20 #include <sys/stat.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <poll.h>
  24 #include <float.h>
  25 #include <cerrno>
  26 #include <ctime>
  27 #include <cmath>
  28 #include <iomanip>
  29 #include <algorithm>
  30 #include <fstream>
  31
  32 #include <glibmm/thread.h>
  33 #include <glibmm/miscutils.h>
  34 #include <glibmm/fileutils.h>
  35 #include "pbd/xml++.h"
  36 #include "pbd/pthread_utils.h"
  37 #include "pbd/enumwriter.h"
  38
  39 #include "ardour/debug.h"
  40 #include "ardour/session.h"
  41 #include "ardour/source.h"
  42 #include "ardour/transient_detector.h"
  43
  44 #include "i18n.h"
  45
  46 using namespace std;
  47 using namespace ARDOUR;
  48 using namespace PBD;
  49
  50 Source::Source (Session& s, DataType type, const string& name, Flag flags)
  51         : SessionObject(s, name)
  52         , _type(type)
  53         , _flags(flags)
  54         , _timeline_position(0)
  55         , _use_count (0)
  56 {
  57         _analysed = false;
  58         _timestamp = 0;
  59         fix_writable_flags ();
  60 }
  61
  62 Source::Source (Session& s, const XMLNode& node)
  63         : SessionObject(s, "unnamed source")
  64         , _type(DataType::AUDIO)
  65         , _flags (Flag (Writable|CanRename))
  66         , _timeline_position(0)
  67         , _use_count (0)
  68 {
  69         _timestamp = 0;
  70         _analysed = false;
  71
  72         if (set_state (node, Stateful::loading_state_version) || _type == DataType::NIL) {
  73                 throw failed_constructor();
  74         }
  75
  76         fix_writable_flags ();
  77 }
  78
  79 Source::~Source ()
  80 {
  81         DEBUG_TRACE (DEBUG::Destruction, string_compose ("Source %1 destructor %2\n", _name, this));
  82 }
  83
  84 void
  85 Source::fix_writable_flags ()
  86 {
  87         if (!_session.writable()) {
  88                 _flags = Flag (_flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy|CanRename));
  89         }
  90 }
  91
  92 XMLNode&
  93 Source::get_state ()
  94 {
  95         XMLNode *node = new XMLNode ("Source");
  96         char buf[64];
  97
  98         node->add_property ("name", name());
  99         node->add_property ("type", _type.to_string());
 100         node->add_property (X_("flags"), enum_2_string (_flags));
 101         _id.print (buf, sizeof (buf));
 102         node->add_property ("id", buf);
 103
 104         if (_timestamp != 0) {
 105                 snprintf (buf, sizeof (buf), "%ld", _timestamp);
 106                 node->add_property ("timestamp", buf);
 107         }
 108
 109         return *node;
 110 }
 111
 112 int
 113 Source::set_state (const XMLNode& node, int version)
 114 {
 115         const XMLProperty* prop;
 116
 117         if ((prop = node.property ("name")) != 0) {
 118                 _name = prop->value();
 119         } else {
 120                 return -1;
 121         }
 122
 123         if ((prop = node.property ("id")) != 0) {
 124                 _id = prop->value ();
 125         } else {
 126                 return -1;
 127         }
 128
 129         if ((prop = node.property ("type")) != 0) {
 130                 _type = DataType(prop->value());
 131         }
 132
 133         if ((prop = node.property ("timestamp")) != 0) {
 134                 sscanf (prop->value().c_str(), "%ld", &_timestamp);
 135         }
 136
 137         if ((prop = node.property (X_("flags"))) != 0) {
 138                 _flags = Flag (string_2_enum (prop->value(), _flags));
 139         } else {
 140                 _flags = Flag (0);
 141
 142         }
 143
 144         /* old style, from the period when we had DestructiveFileSource */
 145         if ((prop = node.property (X_("destructive"))) != 0) {
 146                 _flags = Flag (_flags | Destructive);
 147         }
 148
 149         if (version < 3000) {
 150                 /* a source with an XML node must necessarily already exist,
 151                    and therefore cannot be removable/writable etc. etc.; 2.X
 152                    sometimes marks sources as removable which shouldn't be.
 153                 */
 154                 if (!(_flags & Destructive)) {
 155                         _flags = Flag (_flags & ~(Writable|Removable|RemovableIfEmpty|RemoveAtDestroy|CanRename));
 156                 }
 157         }
 158
 159         return 0;
 160 }
 161
 162 bool
 163 Source::has_been_analysed() const
 164 {
 165         Glib::Mutex::Lock lm (_analysis_lock);
 166         return _analysed;
 167 }
 168
 169 void
 170 Source::set_been_analysed (bool yn)
 171 {
 172         {
 173                 Glib::Mutex::Lock lm (_analysis_lock);
 174                 _analysed = yn;
 175         }
 176
 177         if (yn) {
 178                 load_transients (get_transients_path());
 179                 AnalysisChanged(); // EMIT SIGNAL
 180         }
 181 }
 182
 183 int
 184 Source::load_transients (const string& path)
 185 {
 186         ifstream file (path.c_str());
 187
 188         if (!file) {
 189                 return -1;
 190         }
 191
 192         transients.clear ();
 193
 194         stringstream strstr;
 195         double val;
 196
 197         while (file.good()) {
 198                 file >> val;
 199
 200                 if (!file.fail()) {
 201                         framepos_t frame = (framepos_t) floor (val * _session.frame_rate());
 202                         transients.push_back (frame);
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209 string
 210 Source::get_transients_path () const
 211 {
 212         vector<string> parts;
 213         string s;
 214
 215         /* old sessions may not have the analysis directory */
 216
 217         _session.ensure_subdirs ();
 218
 219         s = _session.analysis_dir ();
 220         parts.push_back (s);
 221
 222         s = _id.to_s();
 223         s += '.';
 224         s += TransientDetector::operational_identifier();
 225         parts.push_back (s);
 226
 227         return Glib::build_filename (parts);
 228 }
 229
 230 bool
 231 Source::check_for_analysis_data_on_disk ()
 232 {
 233         /* looks to see if the analysis files for this source are on disk.
 234            if so, mark us already analysed.
 235         */
 236
 237         string path = get_transients_path ();
 238         bool ok = true;
 239
 240         if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
 241                 ok = false;
 242         }
 243
 244         // XXX add other tests here as appropriate
 245
 246         set_been_analysed (ok);
 247         return ok;
 248 }
 249
 250 void
 251 Source::mark_for_remove ()
 252 {
 253         // This operation is not allowed for sources for destructive tracks or out-of-session files.
 254
 255         /* XXX need a way to detect _within_session() condition here - move it from FileSource?
 256          */
 257
 258         if ((_flags & Destructive)) {
 259                 return;
 260         }
 261
 262         _flags = Flag (_flags | Removable | RemoveAtDestroy);
 263 }
 264
 265 void
 266 Source::set_timeline_position (int64_t pos)
 267 {
 268         _timeline_position = pos;
 269 }
 270
 271 void
 272 Source::set_allow_remove_if_empty (bool yn)
 273 {
 274         if (!writable()) {
 275                 return;
 276         }
 277
 278         if (yn) {
 279                 _flags = Flag (_flags | RemovableIfEmpty);
 280         } else {
 281                 _flags = Flag (_flags & ~RemovableIfEmpty);
 282         }
 283 }
 284
 285 void
 286 Source::inc_use_count ()
 287 {
 288         g_atomic_int_inc (&_use_count);
 289 }
 290
 291 void
 292 Source::dec_use_count ()
 293 {
 294 #ifndef NDEBUG
 295         gint oldval = g_atomic_int_exchange_and_add (&_use_count, -1);
 296         if (oldval <= 0) {
 297                 cerr << "Bad use dec for " << name() << endl;
 298                 abort ();
 299         }
 300         assert (oldval > 0);
 301 #else
 302         g_atomic_int_exchange_and_add (&_use_count, -1);
 303 #endif
 304 }
 305
 306 bool
 307 Source::writable () const
 308 {
 309         return (_flags & Writable) && _session.writable();
 310 }