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;
56 tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
57 renderengine_lock = new Mutex("PlaybackEngine::renderengine_lock");
58 tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
59 pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
60 start_lock = new Condition(0, "PlaybackEngine::start_lock");
65 PlaybackEngine::~PlaybackEngine()
68 que->send_command(STOP,
78 delete_render_engine();
85 delete renderengine_lock;
88 void PlaybackEngine::create_objects()
90 preferences = new Preferences;
91 command = new TransportCommand;
92 que = new TransportQue;
93 // Set the first change to maximum
94 que->command.change_type = CHANGE_ALL;
96 preferences->copy_from(mwindow->preferences);
100 start_lock->lock("PlaybackEngine::create_objects");
103 ChannelDB* PlaybackEngine::get_channeldb()
105 PlaybackConfig *config = command->get_edl()->session->playback_config;
106 switch(config->vconfig->driver)
108 case VIDEO4LINUX2JPEG:
109 return mwindow->channeldb_v4l2jpeg;
111 return mwindow->channeldb_buz;
116 int PlaybackEngine::create_render_engine()
118 // Fix playback configurations
119 delete_render_engine();
122 render_engine = new RenderEngine(this,
127 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
131 void PlaybackEngine::delete_render_engine()
133 renderengine_lock->lock("PlaybackEngine::delete_render_engine");
134 delete render_engine;
136 renderengine_lock->unlock();
139 void PlaybackEngine::arm_render_engine()
142 render_engine->arm_command(command);
145 void PlaybackEngine::start_render_engine()
147 if(render_engine) render_engine->start_command();
150 void PlaybackEngine::wait_render_engine()
152 if(command->realtime && render_engine)
154 render_engine->join();
158 void PlaybackEngine::create_cache()
160 if(audio_cache) { delete audio_cache; audio_cache = 0; }
161 if(video_cache) { delete video_cache; video_cache = 0; }
162 if(!audio_cache) audio_cache = new CICache(preferences);
163 if(!video_cache) video_cache = new CICache(preferences);
167 void PlaybackEngine::perform_change()
169 switch(command->change_type)
174 create_render_engine();
176 if(command->change_type != CHANGE_EDL &&
177 (uint32_t)command->change_type != CHANGE_ALL)
178 render_engine->get_edl()->synchronize_params(command->get_edl());
184 void PlaybackEngine::sync_parameters(EDL *edl)
186 // TODO: lock out render engine from keyframe deletions
187 command->get_edl()->synchronize_params(edl);
188 if(render_engine) render_engine->get_edl()->synchronize_params(edl);
192 void PlaybackEngine::interrupt_playback(int wait_tracking)
194 renderengine_lock->lock("PlaybackEngine::interrupt_playback");
196 render_engine->interrupt_playback();
197 renderengine_lock->unlock();
200 pause_lock->unlock();
202 // Wait for tracking to finish if it is running
205 tracking_done->lock("PlaybackEngine::interrupt_playback");
206 tracking_done->unlock();
211 // Return 1 if levels exist
212 int PlaybackEngine::get_output_levels(double *levels, long position)
215 if(render_engine && render_engine->do_audio)
218 render_engine->get_output_levels(levels, position);
224 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
227 if(render_engine && render_engine->do_audio)
230 render_engine->get_module_levels(module_levels, position);
235 int PlaybackEngine::brender_available(long position)
240 void PlaybackEngine::init_cursor(int active)
244 void PlaybackEngine::init_meters()
248 void PlaybackEngine::stop_cursor()
253 void PlaybackEngine::init_tracking()
255 tracking_active = !command->single_frame() ? 1 : 0;
256 tracking_position = command->playbackstart;
257 tracking_done->lock("PlaybackEngine::init_tracking");
258 init_cursor(tracking_active);
262 void PlaybackEngine::stop_tracking()
266 tracking_done->unlock();
269 void PlaybackEngine::update_tracking(double position)
271 tracking_lock->lock("PlaybackEngine::update_tracking");
272 tracking_position = position;
273 // Signal that the timer is accurate.
274 if(tracking_active) tracking_active = 2;
275 tracking_timer.update();
276 tracking_lock->unlock();
279 double PlaybackEngine::get_tracking_position()
283 tracking_lock->lock("PlaybackEngine::get_tracking_position");
286 // Adjust for elapsed time since last update_tracking.
287 // But tracking timer isn't accurate until the first update_tracking
289 if(tracking_active == 2)
291 //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));
294 // Don't interpolate when every frame is played.
295 if(command->get_edl()->session->video_every_frame &&
297 render_engine->do_video)
299 result = tracking_position;
304 double loop_start = command->get_edl()->local_session->loop_start;
305 double loop_end = command->get_edl()->local_session->loop_end;
306 double loop_size = loop_end - loop_start;
308 if(command->get_direction() == PLAY_FORWARD)
311 result = tracking_position +
312 command->get_speed() *
313 tracking_timer.get_difference() /
316 // Compensate for loop
317 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
318 if(command->get_edl()->local_session->loop_playback)
320 while(result > loop_end) result -= loop_size;
326 result = tracking_position -
327 command->get_speed() *
328 tracking_timer.get_difference() /
331 // Compensate for loop
332 if(command->get_edl()->local_session->loop_playback)
334 while(result < loop_start) result += loop_size;
341 result = tracking_position;
343 tracking_lock->unlock();
344 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
351 void PlaybackEngine::update_transport(int command, int paused)
353 // mwindow->gui->lock_window();
354 // mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
355 // mwindow->gui->unlock_window();
358 void PlaybackEngine::run()
360 start_lock->unlock();
364 // Wait for current command to finish
365 que->output_lock->lock("PlaybackEngine::run");
367 wait_render_engine();
370 // Read the new command
371 que->input_lock->lock("PlaybackEngine::run");
374 command->copy_from(&que->command);
375 que->command.reset();
376 que->input_lock->unlock();
378 //printf("PlaybackEngine::run 1 %d\n", command->command);
381 switch(command->command)
383 // Parameter change only
385 // command->command = last_command;
391 pause_lock->lock("PlaybackEngine::run");
400 last_command = command->command;
403 // Dispatch the command
404 start_render_engine();
408 last_command = command->command;
410 if(command->command == SINGLE_FRAME_FWD ||
411 command->command == SINGLE_FRAME_REWIND)
413 command->playbackstart = get_tracking_position();
419 // Start tracking after arming so the tracking position doesn't change.
420 // The tracking for a single frame command occurs during PAUSE
423 // Dispatch the command
424 start_render_engine();
429 //printf("PlaybackEngine::run 100\n");