hvirtual/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 "condition.inc"
   9 #include "defaults.inc"
  10 #include "edl.inc"
  11 #include "mwindow.inc"
  12 #include "maxchannels.h"
  13 #include "mutex.inc"
  14 #include "tracking.inc"
  15 #include "preferences.inc"
  16 #include "renderengine.inc"
  17 #include "thread.h"
  18 #include "timer.h"
  19 #include "transportque.inc"
  20 #include "videodevice.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_engines();
  30         void delete_render_engines();
  31         void arm_render_engines();
  32         void start_render_engines();
  33         void wait_render_engines();
  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
  59         void run();
  60
  61 // Maintain caches through console changes
  62         CICache *audio_cache, *video_cache;
  63 // Maintain playback cursor on GUI
  64         int tracking_active;
  65 // Tracking variables updated by render engines
  66         double tracking_position;
  67 // Not accurate until the first update_tracking, at which time
  68 // tracking_active is incremented to 2.
  69         Timer tracking_timer;
  70 // Lock access to tracking data
  71         Mutex *tracking_lock;
  72 // Block returns until tracking loop is finished
  73         Condition *tracking_done;
  74 // Pause the main loop for the PAUSE command
  75         Condition *pause_lock;
  76 // Wait until thread has started
  77         Condition *start_lock;
  78
  79         MWindow *mwindow;
  80         Canvas *output;
  81 // Copy of main preferences
  82         Preferences *preferences;
  83 // Next command
  84         TransportQue *que;
  85 // Currently executing command
  86         TransportCommand *command;
  87 // Last command which affected transport
  88         int last_command;
  89         int done;
  90         int do_cwindow;
  91 // Render engine set
  92         ArrayList<RenderEngine*> render_engines;
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106         int reset_parameters();
 107
 108 // ================= position information ======================
 109 // get exact position in samples corrected for speed and direction
 110         long get_position(int sync_time = 1);
 111 // get total samples rendered since last start with no speed correction
 112 // Sync_time uses the video thread to get the current position.
 113 // Otherwise a timer or audio device is used.
 114         long absolute_position(int sync_time = 1);
 115
 116 // stop and start for user changes
 117         int start_reconfigure();
 118         int stop_reconfigure();
 119
 120 // generic render routine
 121         int render_audio();
 122         int reset_buttons();
 123
 124 // ============================ cursor
 125         int lock_playback_cursor();
 126         int unlock_playback_cursor();
 127         int lock_playback_movement();
 128         int unlock_playback_movement();
 129         int move_right(long distance);
 130
 131         Tracking *cursor;
 132
 133
 134 // ============================== playback config
 135         int infinite;        // for infinite playback
 136         int follow_loop;     // 1 if mwindow's looping setting is followed
 137         int is_playing_back;    // 0 - no playback  1 - armed but stopped  2 - playing back
 138         int reconfigure_status;    // 0 - no playback  1 - armed but stopped  2 - playing back
 139                                                               // otherwise use DSP chip if audio tracks are being played
 140         int update_button;            // flag for thread on exit
 141         int use_buttons;              // flag to update buttons when done or not
 142         long last_position;         // starting position for restarting playback
 143         long playback_start, playback_end;  // range for current playback
 144         int reverse;                // direction of current playback
 145         float speed;                // speed of current playback.  A speed of FRAME_SPEED causes frame advance
 146         long playback_buffer;
 147         long audio_module_fragment;
 148
 149 // ================================== audio config
 150         long input_length;        // number of samples to read from disk at a time
 151                                                       // multiple of playback_buffer greater than read_buffer
 152         long output_length;       // # of samples to write to device adjusted for speed
 153         int shared_audio;    // for duplex audio recording
 154
 155 // ================================== video config
 156
 157         long correction_factor;   // number of frames to skip to get synchronized
 158
 159         RenderEngine *render_engine;
 160         AudioDevice *audio;
 161         VideoDevice *video;
 162
 163 private:
 164         int init_parameters();
 165         int init_audio_device();
 166         int init_video_device();
 167         Timer timer;    // timer for position information
 168         long loop_adjustment;       // for factoring loops into current position
 169 };
 170
 171
 172
 173
 174
 175 #endif