在3D球场项目 (二)中，我们梳理了视频弹幕引擎的整体架构、引擎初始化流程。现在，3D 球场部分基本已经探索完毕，我们接下来就是要解决这个项目的数据驱动部分了。
我们现在研究一下下发数据的来源：Opta，它是全球顶级的体育数据公司，1996 年创立于英国伦敦，现隶属于 Stats Perform，是行业公认的足球数据金标准。
覆盖：20+ 运动、3900+ 赛事、每年 6 万 + 场比赛 规模：7.2PB 历史数据、年采集超 10 亿数据点 精度：单场足球2 万 + 事件点，事件识别准确率 99.8% 腾讯体育采买了 Opta WTA 网球比赛的数据，我们可以通过 Opta 的 API 来获取数据。
根据他们官网的介绍，一个 MA3 网球赛事数据中 typeId 对应的意义如下：
点击展开 / 折叠 Event TypeId 完整对照表 Event TypeId Event Name Description 20 STOP_GAME Indicates that the game has finished. 41 START_SET_1 Start 1st Set 42 START_SET_2 Start 2nd Set 43 START_SET_3 Start 3rd Set 44 START_SET_4 Start 4th Set 45 START_SET_5 Start 5th Set 46 STOP_SET Stop Set 47 T_WO1 w.o. Player 1 48 T_WO2 w.o. Player 2 128 SAFE Safe (No longer used) 129 DANGER Danger (Technical/connection issue at venue) 132 INJ_BREAK Game suspended - Player injured 133 PLAYERS_COMING_OUT Players coming out 141 GAME_ABOUT_TO_START Game about to start 149 GAME_SUSPENDED Game suspended 160 PLAYERS_WARMING_UP Players warming up 162 SHAKE_HANDS_WITH_REFEREE Players shake hands with referee 163 COIN_FLIPPING_FOR_FIRST_SERVER Coin flip to choose first server 164 PLAYERS_TALKING_TO_REFEREE Player(s) talking to the referee 165 REFEREE_CHECKING_POINTMARK Referee checking pointmark 166 BOTH_PLAYERS_SEATED Both players seated 167 PLAYER1_RECEIVING_TREATMENT Player 1 receiving treatment 168 PLAYER2_RECEIVING_TREATMENT Player 2 receiving treatment 169 PLAYERS_GOING_TO_COURT Players going back to court 170 NEXT_GAME_ABOUT_TO_START Next game is about to start 180 T_MORE_THAN_5 Rally, over five shots 181 T_MORE_THAN_10 Rally over ten shots 182 T_MORE_THAN_15 Rally over fifteen shots 187 T_POINT_UNDER_INVESTIGATION Point under investigation 188 T_START_TIE_BREAK Start tie break 191 T_POINT_STOPPED_BY_REF Point stopped by referee 197 UPDATE_SCORE_START Start score update 198 UPDATE_SCORE_FINISHED Score update finished 200 SIDE_CHANGE Side change 206 SHOT_CNT Shot count 216 STATISTIC_VERIFICATION Statistics confirmation 240 NEW_BALLS New balls 241 UMPIRE_ON_COURT UMPIRE ON COURT 242 WARMING_UP_VOLLEY Warming up - volley 243 WARMING_UP_SERVICE Warming up - service 244 ONE_MINUTE One minute 245 TIME Time 246 SHOT_DETAILS Shot details 256 CLS Cancel last sent event 257 CLR Clear events 258 GCC Game conditions changed. 261 SCORER Event details for %RELATED_EVENT% in the %MIN%. minute changed 262 BP Ball position event 264 ODD Odds event (deprecated) 266 TIME_CORRECTION_EVENT Correct timestamp for a missed event 276 START_GAME_CLOCK The (stopped) game clock is (re)started the game is running 277 STOP_GAME_CLOCK The game clock is stopped. Time will not change until Start Game Clock is sent again 278 ADJUST_GAME_CLOCK Game clock value is adjusted manually 279 CSTAT A statistical value is cleared and an additional event with the correct action is sent (e.g. an invalid Ace Home event is replaced by a Service Winner Home) 280 CONF_PERIOD_SCORE Period score confirmed 282 TIME_ADAPTION Time for event %RELATED_EVENT% was adapted by %SEC% seconds 285 PLAYER_DATA_CONFIRMED Player data for %RELATED_EVENT% in the %MIN% confirmed 513 SYS_MSG System Message 514 SCOUT_IN_STADION Scout in Stadium 515 CONNECTION_PROBLEMSSCOUT_OFFLINE Connection problems Scout offline 516 CONNECTION_PROBLEMS Connection problems 517 TRANSMISSION_ONLINE Transmission online 520 LINEUP_CHANGED Line-up changed 524 JERSEY_CHANGED Jersey colors updated 782 GAME CANCELLED Automatic “Game cancelled” event after first “cancellation” System message is sent 1152 T_SERVE1 Service Player 1 1153 T_1ST_SERVICE1 1st service Player 1 1154 T_2ND_SERVICE1 2nd service Player 1 1155 T_NA1 Net approach player 1 1156 T_W_FH1 Winner (forehand) Player 1 1157 T_W_BH1 Winner (backhand) Player 1 1158 T_FE_FH1 Forced error (forehand) Player 1 1159 T_FE_BH1 Forced error (backhand) Player 1 1160 T_UE_FH1 Unforced error (forehand) Player 1 1161 T_UE_BH1 Unforced error (backhand) Player 1 1162 T_HE1 Hawkeye Player 1 1163 T_WBR1 Warning by referee Player 1 1164 T_CBR1 Cautioned by referee Player 1 1165 T_SRV_NET1 Net Player 1 1166 T_SRV_OUT1 Out Player 1 1167 T_SRV_FF1 Foot fault Player 1 1168 T_SRV_DF1 Double fault Player 1 1169 T_SRV_A1 Ace Player 1 1170 T_SRV_SW1 Service winner Player 1 1171 T_SRV_RW_FH1 Return winner (forehand) Player 1 1172 T_SRV_IN1 Serve in Player 1 1173 T_POINT1 Point Player 1 1174 T_CONF1 Confirm Point Player 1 1175 T_GAME1 Game Player 1 1176 T_SET1 Set Player 1 1177 T_BL1 Baseline Player 1 1178 T_SRV_NR1 Net/Retake Player 1 1179 T_W1 Winner Player 1 1180 T_FE1 Forced error Player 1 1181 T_UE1 Unforced error Player 1 1182 T_SRV_RW_BH1 Return winner (backhand) Player 1 1183 T_V_FH1 Volley (forehand) Player 1 1184 T_V_BH1 Volley (backhand) Player 1 1185 T_BB1 Break ball Player 1 1186 T_B1 Break Player 1 1187 T_HES1 Hawk eye successful Player 1 1188 T_ITO1 Injury Timeout Player 1 1189 T_START_SRV1 Start Service Player 1 1190 T_WARNING1 1st offence - warning Player 1 1191 T_PENALTY_POINT1 2nd offence - penalty point Player 1 1192 T_PENALTY_GAME1 3rd offence - penalty game Player 1 1193 T_DISQUALIFICATION1 Disqualification Player 1 1194 T_UE_NET1 Unforced error net Player 1 1195 T_FE_NET1 Forced error net Player 1 1196 T_SUCCESSFUL_NET_APPROACH1 Successful net approach Player 1 1197 T_TIME_VIOLATION1 Time violation Player 1 1198 T_PENALTY_POINT1
T_UNSUCCESSFUL_NET_APPROACH1 Unsuccessful net approach Player 1 1199 T_AT_NET1 At net Player 1 1200 T_AT_BASELINE1 At baseline Player 1 1201 T_SET_BALL1 Set ball Player 1 1202 T_MATCH_BALL1 Match ball Player 1 2176 T_SERVE2 Service Player 2 2177 T_1ST_SERVICE2 1st service Player 2 2178 T_2ND_SERVICE2 2nd service Player 2 2179 T_NA2 Net approach player 2 2180 T_W_FH2 Winner (forehand) Player 2 2181 T_W_BH2 Winner (backhand) Player 2 2182 T_FE_FH2 Forced error (forehand) Player 2 2183 T_FE_BH2 Forced error (backhand) Player 2 2184 T_UE_FH2 Unforced error (forehand) Player 2 2185 T_UE_BH2 Unforced error (backhand) Player 2 2186 T_HE2 Hawkeye Player 2 2187 T_WBR2 Warning by referee Player 2 2188 T_CBR2 Cautioned by referee Player 2 2189 T_SRV_NET2 Net Player 2 2190 T_SRV_OUT2 Out Player 2 2191 T_SRV_FF2 Foot fault Player 2 2192 T_SRV_DF2 Double fault Player 2 2193 T_SRV_A2 Ace Player 2 2194 T_SRV_SW2 Service winner Player 2 2195 T_SRV_RW_FH2 Return winner (forehand) Player 2 2196 T_SRV_IN2 Serve in Player 2 2197 T_POINT2 Point Player 2 2198 T_CONF2 Confirm Point Player 2 2199 T_GAME2 Game Player 2 2200 T_SET2 Set Player 2 2201 T_BL2 Baseline Player 2 2202 T_SRV_NR2 Net/Retake Player 2 2203 T_W2 Winner Player 2 2204 T_FE2 Forced error Player 2 2205 T_UE2 Unforced error Player 2 2206 T_SRV_RW_BH2 Return winner (backhand) Player 2 2207 T_V_FH2 Volley (forehand) Player 2 2208 T_V_BH2 Volley (backhand) Player 2 2209 T_BB2 Break ball Player 2 2210 T_B2 Break Player 2 2211 T_HES2 Hawk eye successful Player 2 2212 T_ITO Injury Timeout Player 2 2213 T_START_SRV2 Start Service Player 2 2214 T_WARNING2 1st offence - warning Player 2 2215 T_PENALTY_POINT2 2nd offence - penalty point Player 2 2216 T_PENALTY_GAME2 3rd offence - penalty game Player 2 2217 T_DISQUALIFICATION2 Disqualification Player 2 2218 T_UE_NET2 Unforced error net Player 2 2219 T_FE_NET2 Forced error net Player 2 2220 T_SUCCESSFUL_NET_APPROACH2 Successful net approach Player 2 2221 T_TIME_VIOLATION2 Time violation Player 2 2222 T_AT_NET2 Unsuccessful net approach Player 2 2223 At net Player 2 2224 T_AT_BASELINE2 At baseline Player 2 2225 T_SET_BALL2 Set ball Player 2 2226 T_MATCH_BALL2 Match ball Player 2 PBP = Play-by-Play（逐回合 / 逐事件数据），就是把一场比赛里每一次事件都按时间线秒级记录下来的最细粒度原始数据流。口语里也叫 “逐帧数据 / 流水账数据”。网球赛事的数据，都是以这个形式下发的，一段数据可能下发的数据是这样的：
...