4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "bcsignals.h"
25 #include "condition.h"
27 #include "edlsession.h"
28 #include "localsession.h"
32 #include "mwindowgui.h"
35 #include "playbackengine.h"
36 #include "playtransport.h"
37 #include "preferences.h"
38 #include "renderengine.h"
39 #include "mainsession.h"
40 #include "trackcanvas.h"
41 #include "transportque.h"
45 PlaybackEngine::PlaybackEngine(MWindow *mwindow, Canvas *output)
48 this->mwindow = mwindow;
49 this->output = output;
51 tracking_position = 0;
55 command = new TransportCommand();
56 command->command = STOP;
57 next_command = new TransportCommand();
58 next_command->change_type = CHANGE_ALL;
59 curr_command = new TransportCommand();
60 stop_command = new TransportCommand();
61 stop_command->command = STOP;
62 tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
63 renderengine_lock = new Mutex("PlaybackEngine::renderengine_lock");
64 tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
65 pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
66 start_lock = new Condition(0, "PlaybackEngine::start_lock");
67 input_lock = new Condition(1, "PlaybackEngine::input_lock");
68 output_lock = new Condition(0, "PlaybackEngine::output_lock", 1);
74 PlaybackEngine::~PlaybackEngine()
82 delete_render_engine();
89 delete renderengine_lock;
98 void PlaybackEngine::create_objects()
100 preferences = new Preferences;
101 preferences->copy_from(mwindow->preferences);
105 start_lock->lock("PlaybackEngine::create_objects");
108 ChannelDB* PlaybackEngine::get_channeldb()
110 PlaybackConfig *config = command->get_edl()->session->playback_config;
111 switch(config->vconfig->driver)
113 case VIDEO4LINUX2JPEG:
114 return mwindow->channeldb_v4l2jpeg;
119 int PlaybackEngine::create_render_engine()
121 // Fix playback configurations
122 delete_render_engine();
123 render_engine = new RenderEngine(this, preferences, output, 0);
124 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
128 void PlaybackEngine::delete_render_engine()
130 renderengine_lock->lock("PlaybackEngine::delete_render_engine");
131 delete render_engine;
133 renderengine_lock->unlock();
136 void PlaybackEngine::arm_render_engine()
139 render_engine->arm_command(command);
142 void PlaybackEngine::start_render_engine()
144 if(render_engine) render_engine->start_command();
147 void PlaybackEngine::wait_render_engine()
149 if(command->realtime && render_engine)
151 render_engine->join();
155 void PlaybackEngine::create_cache()
157 if(audio_cache) { delete audio_cache; audio_cache = 0; }
158 if(video_cache) { delete video_cache; video_cache = 0; }
159 if(!audio_cache) audio_cache = new CICache(preferences);
160 if(!video_cache) video_cache = new CICache(preferences);
164 void PlaybackEngine::perform_change()
166 switch( command->change_type )
171 create_render_engine();
173 if(command->change_type != CHANGE_EDL &&
174 (uint32_t)command->change_type != CHANGE_ALL)
175 render_engine->get_edl()->synchronize_params(command->get_edl());
181 void PlaybackEngine::sync_parameters(EDL *edl)
183 // TODO: lock out render engine from keyframe deletions
184 command->get_edl()->synchronize_params(edl);
185 if(render_engine) render_engine->get_edl()->synchronize_params(edl);
189 void PlaybackEngine::interrupt_playback(int wait_tracking)
191 renderengine_lock->lock("PlaybackEngine::interrupt_playback");
193 render_engine->interrupt_playback();
194 renderengine_lock->unlock();
197 pause_lock->unlock();
199 // Wait for tracking to finish if it is running
202 tracking_done->lock("PlaybackEngine::interrupt_playback");
203 tracking_done->unlock();
208 // Return 1 if levels exist
209 int PlaybackEngine::get_output_levels(double *levels, long position)
212 if(render_engine && render_engine->do_audio)
215 render_engine->get_output_levels(levels, position);
221 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
224 if(render_engine && render_engine->do_audio)
227 render_engine->get_module_levels(module_levels, position);
232 int PlaybackEngine::brender_available(long position)
237 void PlaybackEngine::init_cursor(int active)
241 void PlaybackEngine::init_meters()
245 void PlaybackEngine::stop_cursor()
250 void PlaybackEngine::init_tracking()
252 tracking_active = !command->single_frame() ? 1 : 0;
253 tracking_position = command->playbackstart;
254 tracking_done->lock("PlaybackEngine::init_tracking");
255 init_cursor(tracking_active);
259 void PlaybackEngine::stop_tracking()
263 tracking_done->unlock();
266 void PlaybackEngine::update_tracking(double position)
268 tracking_lock->lock("PlaybackEngine::update_tracking");
269 tracking_position = position;
270 // Signal that the timer is accurate.
271 if(tracking_active) tracking_active = 2;
272 tracking_timer.update();
273 tracking_lock->unlock();
276 double PlaybackEngine::get_tracking_position()
280 tracking_lock->lock("PlaybackEngine::get_tracking_position");
283 // Adjust for elapsed time since last update_tracking.
284 // But tracking timer isn't accurate until the first update_tracking
286 if(tracking_active == 2)
288 //printf("PlaybackEngine::get_tracking_position %d %d %d\n", command->get_direction(), tracking_position, tracking_timer.get_scaled_difference(command->get_edl()->session->sample_rate));
291 // Don't interpolate when every frame is played.
292 if(command->get_edl()->session->video_every_frame &&
294 render_engine->do_video)
296 result = tracking_position;
301 double loop_start, loop_end;
302 int play_loop = command->loop_play ? 1 : 0;
303 EDL *edl = command->get_edl();
304 int loop_playback = edl->local_session->loop_playback ? 1 : 0;
305 if( play_loop || !loop_playback ) {
306 loop_start = command->start_position;
307 loop_end = command->end_position;
310 loop_start = edl->local_session->loop_start;
311 loop_end = edl->local_session->loop_end;
314 double loop_size = loop_end - loop_start;
316 if( command->get_direction() == PLAY_FORWARD ) {
318 result = tracking_position +
319 command->get_speed() *
320 tracking_timer.get_difference() /
323 // Compensate for loop
324 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
325 if( play_loop && loop_size > 0 ) {
326 while( result > loop_end ) result -= loop_size;
331 result = tracking_position -
332 command->get_speed() *
333 tracking_timer.get_difference() /
336 // Compensate for loop
337 if( play_loop && loop_size > 0 ) {
338 while( result < loop_start ) result += loop_size;
345 result = tracking_position;
347 tracking_lock->unlock();
348 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
355 void PlaybackEngine::update_transport(int command, int paused)
357 // mwindow->gui->lock_window();
358 // mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
359 // mwindow->gui->unlock_window();
362 void PlaybackEngine::run()
364 start_lock->unlock();
367 // Wait for current command to finish
368 output_lock->lock("PlaybackEngine::run");
369 wait_render_engine();
371 // Read the new command
372 input_lock->lock("PlaybackEngine::run");
374 command->copy_from(curr_command);
375 input_lock->unlock();
376 //printf("PlaybackEngine::run 1 %d\n", command->command);
378 switch( command->command ) {
379 // Parameter change only
386 pause_lock->lock("PlaybackEngine::run");
398 // Dispatch the command
399 start_render_engine();
402 case SINGLE_FRAME_FWD:
403 case SINGLE_FRAME_REWIND:
411 // Start tracking after arming so the tracking position doesn't change.
412 // The tracking for a single frame command occurs during PAUSE
415 // Dispatch the command
416 start_render_engine();
421 //printf("PlaybackEngine::run 100\n");
426 void PlaybackEngine::stop_playback(int wait)
429 interrupt_playback(wait);
430 renderengine_lock->lock("PlaybackEngine::stop_playback");
432 render_engine->wait_done();
433 renderengine_lock->unlock();
437 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
439 //printf("PlaybackEngine::send_command 1 %d\n", command);
440 // Stop requires transferring the output buffer to a refresh buffer.
441 int do_stop = 0, do_resume = 0;
442 int curr_command = this->command->command;
443 int curr_single_frame = TransportCommand::single_frame(curr_command);
444 int curr_audio = this->command->toggle_audio ?
445 !curr_single_frame : curr_single_frame;
446 int single_frame = TransportCommand::single_frame(command);
447 int next_audio = next_command->toggle_audio ? !single_frame : single_frame;
451 case FAST_REWIND: // Commands that play back
454 case SINGLE_FRAME_REWIND:
455 case SINGLE_FRAME_FWD:
461 if( curr_command == command && !next_command->speed &&
462 !curr_single_frame && curr_audio == next_audio ) {
463 // Same direction pressed twice, not shuttle, and no change in audio state, Stop
467 // Resume or change direction
468 switch( curr_command ) {
471 interrupt_playback(wait_tracking);
476 case SINGLE_FRAME_FWD:
477 case SINGLE_FRAME_REWIND:
480 next_command->realtime = 1;
481 next_command->resume = do_resume;
482 // Start from scratch
483 transport_command(command, CHANGE_NONE, edl, use_inout);
488 // Commands that stop
498 interrupt_playback(wait_tracking);
502 int PlaybackEngine::transport_stop()
504 input_lock->lock("PlaybackEngine::transport_stop 1");
505 curr_command->copy_from(stop_command);
506 input_lock->unlock();
507 output_lock->unlock();
511 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
513 input_lock->lock("PlaybackEngine::transport_command 1");
514 next_command->command = command;
515 next_command->change_type |= change_type;
517 // Just change the EDL if the change requires it because renderengine
518 // structures won't point to the new EDL otherwise and because copying the
519 // EDL for every cursor movement is slow.
520 switch( change_type ) {
523 next_command->get_edl()->copy_all(new_edl);
526 next_command->get_edl()->synchronize_params(new_edl);
529 next_command->set_playback_range(new_edl, use_inout,
530 preferences->forward_render_displacement);
532 curr_command->copy_from(next_command);
533 next_command->reset();
534 input_lock->unlock();
535 output_lock->unlock();
539 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
541 int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
542 next_command->realtime = 1;
543 transport_command(command, change_type, edl);