libs/ardour/session_events.cc

   1 /*
   2     Copyright (C) 1999-2004 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 <cmath>
  21 #include <unistd.h>
  22
  23 #include "ardour/timestamps.h"
  24
  25 #include "pbd/error.h"
  26 #include "pbd/enumwriter.h"
  27
  28 #include "ardour/ardour.h"
  29 #include "ardour/audio_diskstream.h"
  30 #include "ardour/butler.h"
  31 #include "ardour/debug.h"
  32 #include "ardour/session_event.h"
  33
  34 #include "i18n.h"
  35
  36 using namespace std;
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39
  40 PerThreadPool* SessionEvent::pool;
  41
  42 void
  43 SessionEvent::init_event_pool ()
  44 {
  45         pool = new PerThreadPool;
  46 }
  47
  48 void
  49 SessionEvent::create_per_thread_pool (const std::string& name, uint32_t nitems)
  50 {
  51         /* this is a per-thread call that simply creates a thread-private ptr to
  52            a CrossThreadPool for use by this thread whenever events are allocated/released
  53            from SessionEvent::pool()
  54         */
  55         pool->create_per_thread_pool (name, sizeof (SessionEvent), nitems);
  56 }
  57
  58 void *
  59 SessionEvent::operator new (size_t)
  60 {
  61         CrossThreadPool* p = pool->per_thread_pool ();
  62         SessionEvent* ev = static_cast<SessionEvent*> (p->alloc ());
  63         cerr << "Allocating SessionEvent from " << p->name() << " ev @ " << ev << endl;
  64         ev->own_pool = p;
  65         return ev;
  66 }
  67
  68 void
  69 SessionEvent::operator delete (void *ptr, size_t /*size*/)
  70 {
  71         Pool* p = pool->per_thread_pool ();
  72         SessionEvent* ev = static_cast<SessionEvent*> (ptr);
  73
  74         cerr << "Deleting SessionEvent @ " << ev << " thread pool =  " << p->name() << " ev pool = " << ev->own_pool->name() << endl;
  75         if (p == ev->own_pool) {
  76                 p->release (ptr);
  77         } else {
  78                 ev->own_pool->push (ev);
  79         }
  80 }
  81
  82 void
  83 SessionEventManager::add_event (framepos_t frame, SessionEvent::Type type, framepos_t target_frame)
  84 {
  85         SessionEvent* ev = new SessionEvent (type, SessionEvent::Add, frame, target_frame, 0);
  86         queue_event (ev);
  87 }
  88
  89 void
  90 SessionEventManager::remove_event (framepos_t frame, SessionEvent::Type type)
  91 {
  92         SessionEvent* ev = new SessionEvent (type, SessionEvent::Remove, frame, 0, 0);
  93         queue_event (ev);
  94 }
  95
  96 void
  97 SessionEventManager::replace_event (SessionEvent::Type type, framepos_t frame, framepos_t target)
  98 {
  99         SessionEvent* ev = new SessionEvent (type, SessionEvent::Replace, frame, target, 0);
 100         queue_event (ev);
 101 }
 102
 103 void
 104 SessionEventManager::clear_events (SessionEvent::Type type)
 105 {
 106         SessionEvent* ev = new SessionEvent (type, SessionEvent::Clear, 0, 0, 0);
 107         queue_event (ev);
 108 }
 109
 110
 111 void
 112 SessionEventManager::dump_events () const
 113 {
 114         cerr << "EVENT DUMP" << endl;
 115         for (Events::const_iterator i = events.begin(); i != events.end(); ++i) {
 116                 cerr << "\tat " << (*i)->action_frame << ' ' << (*i)->type << " target = " << (*i)->target_frame << endl;
 117         }
 118         cerr << "Next event: ";
 119
 120         if ((Events::const_iterator) next_event == events.end()) {
 121                 cerr << "none" << endl;
 122         } else {
 123                 cerr << "at " << (*next_event)->action_frame << ' '
 124                      << (*next_event)->type << " target = "
 125                      << (*next_event)->target_frame << endl;
 126         }
 127         cerr << "Immediate events pending:\n";
 128         for (Events::const_iterator i = immediate_events.begin(); i != immediate_events.end(); ++i) {
 129                 cerr << "\tat " << (*i)->action_frame << ' ' << (*i)->type << " target = " << (*i)->target_frame << endl;
 130         }
 131         cerr << "END EVENT_DUMP" << endl;
 132 }
 133
 134 void
 135 SessionEventManager::merge_event (SessionEvent* ev)
 136 {
 137         switch (ev->action) {
 138         case SessionEvent::Remove:
 139                 _remove_event (ev);
 140                 delete ev;
 141                 return;
 142
 143         case SessionEvent::Replace:
 144                 _replace_event (ev);
 145                 return;
 146
 147         case SessionEvent::Clear:
 148                 _clear_event_type (ev->type);
 149                 delete ev;
 150                 return;
 151
 152         case SessionEvent::Add:
 153                 break;
 154         }
 155
 156         /* try to handle immediate events right here */
 157
 158         if (ev->action_frame == 0) {
 159                 process_event (ev);
 160                 return;
 161         }
 162
 163         switch (ev->type) {
 164         case SessionEvent::AutoLoop:
 165         case SessionEvent::StopOnce:
 166                 _clear_event_type (ev->type);
 167                 break;
 168
 169         default:
 170                 for (Events::iterator i = events.begin(); i != events.end(); ++i) {
 171                         if ((*i)->type == ev->type && (*i)->action_frame == ev->action_frame) {
 172                           error << string_compose(_("Session: cannot have two events of type %1 at the same frame (%2)."),
 173                                                   enum_2_string (ev->type), ev->action_frame) << endmsg;
 174                                 return;
 175                         }
 176                 }
 177         }
 178
 179         events.insert (events.begin(), ev);
 180         events.sort (SessionEvent::compare);
 181         next_event = events.begin();
 182         set_next_event ();
 183 }
 184
 185 /** @return true when @a ev is deleted. */
 186 bool
 187 SessionEventManager::_replace_event (SessionEvent* ev)
 188 {
 189         bool ret = false;
 190         Events::iterator i;
 191
 192         /* private, used only for events that can only exist once in the queue */
 193
 194         for (i = events.begin(); i != events.end(); ++i) {
 195                 if ((*i)->type == ev->type) {
 196                         (*i)->action_frame = ev->action_frame;
 197                         (*i)->target_frame = ev->target_frame;
 198                         if ((*i) == ev) {
 199                                 ret = true;
 200                         }
 201                         delete ev;
 202                         break;
 203                 }
 204         }
 205
 206         if (i == events.end()) {
 207                 events.insert (events.begin(), ev);
 208         }
 209
 210         events.sort (SessionEvent::compare);
 211         next_event = events.end();
 212         set_next_event ();
 213
 214         return ret;
 215 }
 216
 217 /** @return true when @a ev is deleted. */
 218 bool
 219 SessionEventManager::_remove_event (SessionEvent* ev)
 220 {
 221         bool ret = false;
 222         Events::iterator i;
 223
 224         for (i = events.begin(); i != events.end(); ++i) {
 225                 if ((*i)->type == ev->type && (*i)->action_frame == ev->action_frame) {
 226                         if ((*i) == ev) {
 227                                 ret = true;
 228                         }
 229
 230                         delete *i;
 231                         if (i == next_event) {
 232                                 ++next_event;
 233                         }
 234                         events.erase (i);
 235                         break;
 236                 }
 237         }
 238
 239         if (i != events.end()) {
 240                 set_next_event ();
 241         }
 242
 243         return ret;
 244 }
 245
 246 void
 247 SessionEventManager::_clear_event_type (SessionEvent::Type type)
 248 {
 249         Events::iterator i, tmp;
 250
 251         for (i = events.begin(); i != events.end(); ) {
 252
 253                 tmp = i;
 254                 ++tmp;
 255
 256                 if ((*i)->type == type) {
 257                         delete *i;
 258                         if (i == next_event) {
 259                                 ++next_event;
 260                         }
 261                         events.erase (i);
 262                 }
 263
 264                 i = tmp;
 265         }
 266
 267         for (i = immediate_events.begin(); i != immediate_events.end(); ) {
 268
 269                 tmp = i;
 270                 ++tmp;
 271
 272                 if ((*i)->type == type) {
 273                         delete *i;
 274                         immediate_events.erase (i);
 275                 }
 276
 277                 i = tmp;
 278         }
 279
 280         set_next_event ();
 281 }
 282