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 port, unsigned controller, 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 port, unsigned controller, 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  * Reset the state of movie to initial state.
 192  */
 193         void reset_state() throw();
 194 /**
 195  * Get reset status for current frame.
 196  *
 197  * returns: -1 if current frame doesn't have a reset. Otherwise number of cycles to wait for delayed reset (0 is
 198  *      immediate reset).
 199  */
 200         long get_reset_status() throw();
 201
 202 /**
 203  * Commit a reset (writes a reset into current frame in readwrite mode).
 204  *
 205  * parameter delay: The number of cycles to delay the reset.
 206  */
 207         void commit_reset(long delay) throw(std::bad_alloc);
 208
 209 /**
 210  * Get how manyth poll in the frame next poll would be?
 211  *
 212  * returns: Poll number.
 213  */
 214         unsigned next_poll_number();
 215 /**
 216  * Get how many subframes there are in specified frame.
 217  *
 218  * parameter frame: The frame number.
 219  * returns: Number of subframes (0 if outside movie).
 220  */
 221         uint64_t frame_subframes(uint64_t frame) throw();
 222 /**
 223  * Read controls from specified subframe of specified frame.
 224  *
 225  * parameter frame: The frame number.
 226  * parameter subframe: Subframe within frame (first is 0).
 227  * returns: The controls for subframe. If subframe is too great, reads last present subframe. If frame is outside
 228  *      movie, reads all released.
 229  */
 230         controller_frame read_subframe(uint64_t frame, uint64_t subframe) throw();
 231 /**
 232  * Fast save.
 233  */
 234         void fast_save(uint64_t& _frame, uint64_t& _ptr, uint64_t& _lagc, std::vector<uint32_t>& counters);
 235 /**
 236  * Fast load.
 237  */
 238         void fast_load(uint64_t& _frame, uint64_t& _ptr, uint64_t& _lagc, std::vector<uint32_t>& counters);
 239
 240 private:
 241         //TRUE if readonly mode is active.
 242         bool readonly;
 243         //Movie (not global!) rerecord count.
 244         std::string rerecords;
 245         //Project ID.
 246         std::string _project_id;
 247         //The actual controller data.
 248         controller_frame_vector movie_data;
 249         //Current frame + 1 (0 before next_frame() has been called.
 250         uint64_t current_frame;
 251         //First subframe in current frame (movie_data.size() if no subframes have been stored).
 252         uint64_t current_frame_first_subframe;
 253         //How many times has each control been polled (bit 31 is data ready bit)?
 254         pollcounter_vector pollcounters;
 255         //Current state of buttons.
 256         controller_frame current_controls;
 257         //Number of known lag frames.
 258         uint64_t lag_frames;
 259         //Number of frames in movie.
 260         uint64_t frames_in_movie;
 261         //Cached subframes.
 262         void clear_caches() throw();
 263         uint64_t cached_frame;
 264         uint64_t cached_subframe;
 265         //Count present subframes in frame starting from first_subframe (returns 0 if out of movie).
 266         uint32_t count_changes(uint64_t first_subframe) throw();
 267 };
 268
 269 /**
 270  * Class encapsulating bridge logic between bsnes interface and movie code.
 271  */
 272 class movie_logic
 273 {
 274 public:
 275 /**
 276  * Create new bridge.
 277  */
 278         movie_logic() throw();
 279
 280 /**
 281  * Get the movie instance associated.
 282  *
 283  * returns: The movie instance.
 284  */
 285         movie& get_movie() throw();
 286
 287 /**
 288  * Notify about new frame starting.
 289  *
 290  * returns: Reset status for the new frame.
 291  */
 292         long new_frame_starting(bool dont_poll) throw(std::bad_alloc, std::runtime_error);
 293
 294 /**
 295  * Poll for input.
 296  *
 297  * parameter port: The port number.
 298  * parameter dev: The controller index.
 299  * parameter id: Control id.
 300  * returns: Value for polled input.
 301  * throws std::bad_alloc: Not enough memory.
 302  * throws std::runtime_error: Error polling for input.
 303  */
 304         short input_poll(unsigned port, unsigned dev, unsigned id) throw(std::bad_alloc, std::runtime_error);
 305
 306 /**
 307  * Called when movie code needs new controls snapshot.
 308  *
 309  * parameter subframe: True if this is for subframe update, false if for frame update.
 310  */
 311         controller_frame update_controls(bool subframe) throw(std::bad_alloc, std::runtime_error);
 312 private:
 313         movie mov;
 314 };
 315
 316 #endif