cinelerra/playbackengine.h

   1 #ifndef PLAYBACKENGINE_H
   2 #define PLAYBACKENGINE_H
   3
   4 #include "arraylist.h"
   5 #include "audiodevice.inc"
   6 #include "cache.inc"
   7 #include "canvas.inc"
   8 #include "channeldb.inc"
   9 #include "condition.inc"
  10 #include "defaults.inc"
  11 #include "edl.inc"
  12 #include "mwindow.inc"
  13 #include "maxchannels.h"
  14 #include "mutex.inc"
  15 #include "tracking.inc"
  16 #include "preferences.inc"
  17 #include "renderengine.inc"
  18 #include "thread.h"
  19 #include "bctimer.h"
  20 #include "transportque.inc"
  21 #include "videodevice.inc"
  22
  23 class PlaybackEngine : public Thread
  24 {
  25 public:
  26         PlaybackEngine(MWindow *mwindow, Canvas *output);
  27         virtual ~PlaybackEngine();
  28
  29         int create_objects();
  30         virtual int create_render_engine();
  31         void delete_render_engine();
  32         void arm_render_engine();
  33         void start_render_engine();
  34         void wait_render_engine();
  35         void create_cache();
  36         void perform_change();
  37         void sync_parameters(EDL *edl);
  38 // Set wait_tracking for events that change the cursor location but
  39 // be sure to unlock the windows
  40         void interrupt_playback(int wait_tracking = 0);
  41 // Get levels for tracking.  Return 0 if no audio.
  42         int get_output_levels(double *levels, long position);
  43         int get_module_levels(ArrayList<double> *module_levels, long position);
  44 // The MWindow starts the playback cursor loop
  45 // The other windows start a slider loop
  46 // For pausing only the cursor is run
  47         virtual void init_cursor();
  48         virtual void stop_cursor();
  49         virtual int brender_available(long position);
  50 // For normal playback tracking and the cursor are started
  51         virtual void init_tracking();
  52         virtual void stop_tracking();
  53 // The playback cursor calls this to calculate the current tracking position
  54         virtual double get_tracking_position();
  55 // Reset the transport after completion
  56         virtual void update_transport(int command, int paused);
  57 // The render engines call this to update tracking variables in the playback engine.
  58         void update_tracking(double position);
  59 // Get the output channel table for the current device or 0 if none exists.
  60         ChannelDB* get_channeldb();
  61
  62         void run();
  63
  64 // Maintain caches through console changes
  65         CICache *audio_cache, *video_cache;
  66 // Maintain playback cursor on GUI
  67         int tracking_active;
  68 // Tracking variables updated by render engines
  69         double tracking_position;
  70 // Not accurate until the first update_tracking, at which time
  71 // tracking_active is incremented to 2.
  72         Timer tracking_timer;
  73 // Lock access to tracking data
  74         Mutex *tracking_lock;
  75 // Block returns until tracking loop is finished
  76         Condition *tracking_done;
  77 // Pause the main loop for the PAUSE command
  78         Condition *pause_lock;
  79 // Wait until thread has started
  80         Condition *start_lock;
  81
  82         MWindow *mwindow;
  83         Canvas *output;
  84 // Copy of main preferences
  85         Preferences *preferences;
  86 // Next command
  87         TransportQue *que;
  88 // Currently executing command
  89         TransportCommand *command;
  90 // Last command which affected transport
  91         int last_command;
  92         int done;
  93         int do_cwindow;
  94 // Render engine
  95         RenderEngine *render_engine;
  96
  97 // Used by label commands to get current position
  98         int is_playing_back;
  99
 100 // General purpose debugging register
 101         int debug;
 102 };
 103
 104
 105
 106
 107
 108 #endif