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