--- /dev/null
+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef PLAYBACKENGINE_H
+#define PLAYBACKENGINE_H
+
+#include "arraylist.h"
+#include "audiodevice.inc"
+#include "cache.inc"
+#include "canvas.inc"
+#include "channeldb.inc"
+#include "condition.inc"
+#include "bchash.inc"
+#include "edl.inc"
+#include "mwindow.inc"
+#include "maxchannels.h"
+#include "mutex.inc"
+#include "tracking.inc"
+#include "preferences.inc"
+#include "renderengine.inc"
+#include "thread.h"
+#include "bctimer.h"
+#include "transportque.inc"
+
+class PlaybackEngine : public Thread
+{
+public:
+ PlaybackEngine(MWindow *mwindow, Canvas *output);
+ virtual ~PlaybackEngine();
+
+ void create_objects();
+ virtual int create_render_engine();
+ void delete_render_engine();
+ void arm_render_engine();
+ void start_render_engine();
+ void wait_render_engine();
+ void create_cache();
+ void perform_change();
+ void sync_parameters(EDL *edl);
+// Set wait_tracking for events that change the cursor location but
+// be sure to unlock the windows
+ void interrupt_playback(int wait_tracking = 0);
+// Get levels for tracking. Return 0 if no audio.
+ int get_output_levels(double *levels, long position);
+ int get_module_levels(ArrayList<double> *module_levels, long position);
+// The MWindow starts the playback cursor loop
+// The other windows start a slider loop
+// For pausing only the cursor is run
+ virtual void init_cursor(int active);
+ virtual void stop_cursor();
+ virtual int brender_available(long position);
+// For normal playback tracking and the cursor are started
+ virtual void init_tracking();
+ virtual void stop_tracking();
+ virtual void init_meters();
+// The playback cursor calls this to calculate the current tracking position
+ virtual double get_tracking_position();
+// Reset the transport after completion
+ virtual void update_transport(int command, int paused);
+// The render engines call this to update tracking variables in the playback engine.
+ void update_tracking(double position);
+// Get the output channel table for the current device or 0 if none exists.
+ ChannelDB* get_channeldb();
+
+ void run();
+
+// Maintain caches through console changes
+ CICache *audio_cache, *video_cache;
+// Maintain playback cursor on GUI
+ int tracking_active;
+// Tracking variables updated by render engines
+ double tracking_position;
+// Not accurate until the first update_tracking, at which time
+// tracking_active is incremented to 2.
+ Timer tracking_timer;
+// Lock access to tracking data
+ Mutex *tracking_lock;
+// Lock access to renderengine between interrupt and deletion
+ Mutex *renderengine_lock;
+// Block returns until tracking loop is finished
+ Condition *tracking_done;
+// Pause the main loop for the PAUSE command
+ Condition *pause_lock;
+// Wait until thread has started
+ Condition *start_lock;
+
+ MWindow *mwindow;
+ Canvas *output;
+// Copy of main preferences
+ Preferences *preferences;
+// Next command
+ TransportQue *que;
+// Currently executing command
+ TransportCommand *command;
+// Last command which affected transport
+ int last_command;
+ int done;
+ int do_cwindow;
+// Render engine
+ RenderEngine *render_engine;
+
+// Used by label commands to get current position
+ int is_playing_back;
+
+// General purpose debugging register
+ int debug;
+};
+
+
+
+
+
+#endif