include/core/movie.hpp

   1 #ifndef _movie__hpp__included__
   2 #define _movie__hpp__included__
   3
   4 #include <string>
   5 #include <cstdint>
   6 #include <stdexcept>
   7 #include "controllerframe.hpp"
   8
   9 /**
  10  * Movie being played back or recorded
  11  */
  12 class movie
  13 {
  14 public:
  15 /**
  16  * Construct new empty movie.
  17  *
  18  * throws std::bad_alloc: Not enough memory.
  19  */
  20         movie() throw(std::bad_alloc);
  21
  22 /**
  23  * Is the movie in readonly mode?
  24  *
  25  * returns: True if in read-only mode, false if in read-write mode.
  26  */
  27         bool readonly_mode() throw();
  28
  29 /**
  30  * Switches movie to read-only or read-write mode. If switching to read-write mode, the movie is truncated.
  31  *
  32  * parameter enable: If true, switch to read-only mode, else to read-write mode.
  33  * throws std::bad_alloc: Not enough memory.
  34  */
  35         void readonly_mode(bool enable) throw(std::bad_alloc);
  36
  37 /**
  38  * Returns the movie rerecord count (this is not the same thing as global rerecord count).
  39  *
  40  * returns: The movie rerecord count
  41  * throws std::bad_alloc: Not enough memory.
  42  */
  43         std::string rerecord_count() throw(std::bad_alloc);
  44
  45 /**
  46  * Sets the movie rerecord count (this is not the same thing as global rerecord count).
  47  *
  48  * parameter count: The new rerecord count
  49  * throws std::bad_alloc: Not enough memory.
  50  */
  51         void rerecord_count(const std::string& count) throw(std::bad_alloc);
  52
  53 /**
  54  * Read project ID
  55  *
  56  * returns: The project ID
  57  * throws std::bad_alloc: Not enough memory.
  58  */
  59         std::string project_id() throw(std::bad_alloc);
  60
  61 /**
  62  * brief Set project ID
  63  *
  64  * parameter id: New project ID.
  65  * throws std::bad_alloc: Not enough memory.
  66  */
  67         void project_id(const std::string& id) throw(std::bad_alloc);
  68
  69 /**
  70  * Get number of frames in movie
  71  *
  72  * returns: The number of frames.
  73  */
  74         uint64_t get_frame_count() throw();
  75
  76 /**
  77  * Get number of current frame in movie
  78  *
  79  * The first frame in movie is 1. 0 is "before first frame" value.
  80  *
  81  * returns: The number of frame
  82  */
  83         uint64_t get_current_frame() throw();
  84
  85 /**
  86  * Get number of lag frames so far
  87  *
  88  * returns: The number of lag frames.
  89  */
  90         uint64_t get_lag_frames() throw();
  91
  92 /**
  93  * This function advances to next frame in movie, discarding subframes not used. If the frame is lag frame, it is
  94  * counted as lag frame and subframe entry for it is made (if in readwrite mode).
  95  *
  96  * throws std::bad_alloc: Not enough memory.
  97  */
  98         void next_frame() throw(std::bad_alloc);
  99
 100 /**
 101  * Reads the data ready flag. On new frame, all data ready flags are unset. On reading control, its data ready
 102  * flag is unset.
 103  *
 104  * parameter pid: Physical controller id.
 105  * parameter index: Control ID.
 106  * returns: The read value.
 107  * throws std::logic_error: Invalid control index.
 108  */
 109         bool get_DRDY(unsigned pid, unsigned index) throw(std::logic_error);
 110
 111 /**
 112  * Set all data ready flags
 113  */
 114         void set_all_DRDY() throw();
 115
 116 /**
 117  * Poll a control by (port, controller, index) tuple.
 118  *
 119  * parameter pid: Physical controller ID.
 120  * parameter index: The index of control in controller (0 to 11)
 121  * returns: The read value
 122  * throws std::bad_alloc: Not enough memory.
 123  * throws std::logic_error: Invalid port, controller or index or before movie start.
 124  */
 125         short next_input(unsigned pid, unsigned index) throw(std::bad_alloc, std::logic_error);
 126
 127 /**
 128  * Set current control values. These are read in readwrite mode.
 129  *
 130  * parameter controls: The new controls.
 131  */
 132         void set_controls(controller_frame controls) throw();
 133
 134 /**
 135  * Get current control values in effect.
 136  *
 137  * returns: Controls
 138  */
 139         controller_frame get_controls() throw();
 140
 141 /**
 142  * Loads a movie plus some other parameters. The playback pointer is positioned to start of movie and readonly
 143  * mode is enabled.
 144  *
 145  * parameter rerecs: Movie rerecord count.
 146  * parameter project_id: Project ID of movie.
 147  * parameter input: The input track.
 148  * throws std::bad_alloc: Not enough memory.
 149  * throws std::runtime_error: Bad movie data.
 150  */
 151         void load(const std::string& rerecs, const std::string& project_id, controller_frame_vector& input)
 152                 throw(std::bad_alloc, std::runtime_error);
 153
 154 /**
 155  * Saves the movie data.
 156  *
 157  * returns: The movie data.
 158  * throws std::bad_alloc: Not enough memory.
 159  */
 160         controller_frame_vector save() throw(std::bad_alloc);
 161
 162 /**
 163  * This method serializes the state of movie code.
 164  *
 165  * Parameter proj_id: The project ID is written here.
 166  * Parameter curframe: Current frame is written here.
 167  * Parameter lagframes: Lag counter is written here.
 168  * Parameter pcounters: Poll counters are written here.
 169  * throws std::bad_alloc: Not enough memory.
 170  */
 171         void save_state(std::string& proj_id, uint64_t& curframe, uint64_t& lagframes,
 172                 std::vector<uint32_t>& pcounters) throw(std::bad_alloc);
 173
 174 /**
 175  * Given previous serialized state from this movie, restore the state.
 176  *
 177  * Parameter curframe: Current frame.
 178  * Parameter lagframe: Lag counter.
 179  * Parameter pcounters: Poll counters.
 180  * Parameter ro: If true, restore in readonly mode.
 181  * Parameter old_movie: Old movie to check for compatiblity against.
 182  * Parameter old_projectid: Old project ID to check against.
 183  * Returns: ???
 184  * Throws std::bad_alloc: Not enough memory.
 185  * Throws std::runtime_error: Movie check failure.
 186  */
 187         size_t restore_state(uint64_t curframe, uint64_t lagframe, const std::vector<uint32_t>& pcounters, bool ro,
 188                 controller_frame_vector* old_movie, const std::string& old_projectid) throw(std::bad_alloc,
 189                 std::runtime_error);
 190
 191 /**
 192  * Get reset status for current frame.
 193  *
 194  * returns: -1 if current frame doesn't have a reset. Otherwise number of cycles to wait for delayed reset (0 is
 195  *      immediate reset).
 196  */
 197         long get_reset_status() throw();
 198
 199 /**
 200  * Commit a reset (writes a reset into current frame in readwrite mode).
 201  *
 202  * parameter delay: The number of cycles to delay the reset.
 203  */
 204         void commit_reset(long delay) throw(std::bad_alloc);
 205
 206 /**
 207  * Get how manyth poll in the frame next poll would be?
 208  *
 209  * returns: Poll number.
 210  */
 211         unsigned next_poll_number();
 212 /**
 213  * Get how many subframes there are in specified frame.
 214  *
 215  * parameter frame: The frame number.
 216  * returns: Number of subframes (0 if outside movie).
 217  */
 218         uint64_t frame_subframes(uint64_t frame) throw();
 219 /**
 220  * Read controls from specified subframe of specified frame.
 221  *
 222  * parameter frame: The frame number.
 223  * parameter subframe: Subframe within frame (first is 0).
 224  * returns: The controls for subframe. If subframe is too great, reads last present subframe. If frame is outside
 225  *      movie, reads all released.
 226  */
 227         controller_frame read_subframe(uint64_t frame, uint64_t subframe) throw();
 228 private:
 229         //TRUE if readonly mode is active.
 230         bool readonly;
 231         //Movie (not global!) rerecord count.
 232         std::string rerecords;
 233         //Project ID.
 234         std::string _project_id;
 235         //The actual controller data.
 236         controller_frame_vector movie_data;
 237         //Current frame + 1 (0 before next_frame() has been called.
 238         uint64_t current_frame;
 239         //First subframe in current frame (movie_data.size() if no subframes have been stored).
 240         uint64_t current_frame_first_subframe;
 241         //How many times has each control been polled (bit 31 is data ready bit)?
 242         pollcounter_vector pollcounters;
 243         //Current state of buttons.
 244         controller_frame current_controls;
 245         //Number of known lag frames.
 246         uint64_t lag_frames;
 247         //Number of frames in movie.
 248         uint64_t frames_in_movie;
 249         //Cached subframes.
 250         void clear_caches() throw();
 251         uint64_t cached_frame;
 252         uint64_t cached_subframe;
 253         //Count present subframes in frame starting from first_subframe (returns 0 if out of movie).
 254         uint32_t count_changes(uint64_t first_subframe) throw();
 255 };
 256
 257 /**
 258  * Class encapsulating bridge logic between bsnes interface and movie code.
 259  */
 260 class movie_logic
 261 {
 262 public:
 263 /**
 264  * Create new bridge.
 265  */
 266         movie_logic() throw();
 267
 268 /**
 269  * Get the movie instance associated.
 270  *
 271  * returns: The movie instance.
 272  */
 273         movie& get_movie() throw();
 274
 275 /**
 276  * Notify about new frame starting.
 277  *
 278  * returns: Reset status for the new frame.
 279  */
 280         long new_frame_starting(bool dont_poll) throw(std::bad_alloc, std::runtime_error);
 281
 282 /**
 283  * Poll for input.
 284  *
 285  * parameter port: The port number.
 286  * parameter dev: The controller index.
 287  * parameter id: Control id.
 288  * returns: Value for polled input.
 289  * throws std::bad_alloc: Not enough memory.
 290  * throws std::runtime_error: Error polling for input.
 291  */
 292         short input_poll(bool port, unsigned dev, unsigned id) throw(std::bad_alloc, std::runtime_error);
 293
 294 /**
 295  * Called when movie code needs new controls snapshot.
 296  *
 297  * parameter subframe: True if this is for subframe update, false if for frame update.
 298  */
 299         controller_frame update_controls(bool subframe) throw(std::bad_alloc, std::runtime_error);
 300 private:
 301         movie mov;
 302 };
 303
 304 #endif