| 1 | package cz.vutbr.feec.session.rtprtcp.internal; |
| 2 | |
| 3 | import java.util.Enumeration; |
| 4 | import java.util.Hashtable; |
| 5 | |
| 6 | |
| 7 | /** |
| 8 | * The Class MemberTable. |
| 9 | */ |
| 10 | public class MemberTable { |
| 11 | /** The members map. */ |
| 12 | protected Hashtable<Long, Source> membersMap = new Hashtable<Long, Source>(); |
| 13 | |
| 14 | /** The senders map. */ |
| 15 | protected Hashtable<Long, Source> sendersMap = new Hashtable<Long, Source>(); |
| 16 | |
| 17 | /** The invalid map. */ |
| 18 | protected Hashtable<Long, Source> invalidMap = new Hashtable<Long, Source>(); |
| 19 | |
| 20 | /** The previous memebers count. */ |
| 21 | private int previousMemebersCount = 0; |
| 22 | |
| 23 | /** |
| 24 | * Adds the member. |
| 25 | * |
| 26 | * @param seqNo the seq no |
| 27 | * @param SSRC the SSRC |
| 28 | * |
| 29 | * @return the source |
| 30 | */ |
| 31 | protected synchronized Source addMember(long SSRC, long seqNo ) { |
| 32 | assert invalidMap.get(Long.valueOf(SSRC)) == null: "Member "+SSRC+" jiz existuje v tabulce invalidMap!!!";; |
| 33 | assert membersMap.get(Long.valueOf(SSRC)) == null: "Member "+SSRC+" jiz existuje v tabulce membersMap!!!";; |
| 34 | assert sendersMap.get(Long.valueOf(SSRC)) == null: "Member "+SSRC+" jiz existuje v tabulce sendersMap!!!";; |
| 35 | |
| 36 | Source src = new Source(SSRC, seqNo); |
| 37 | src.probation = Source.MIN_SEQUENTIAL; |
| 38 | src.timeOfLastRTPSent = 0; // we_sent = false |
| 39 | src.setValidated(false); |
| 40 | |
| 41 | invalidMap.put(Long.valueOf(SSRC), src); |
| 42 | return src; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Validate. |
| 47 | * |
| 48 | * @param SSRC the SSRC |
| 49 | */ |
| 50 | protected synchronized void validate(long SSRC) { |
| 51 | Source src = invalidMap.get(Long.valueOf(SSRC)); |
| 52 | assert src != null: "Member "+SSRC+" neexistuje v tabulce invalidMap!!!"; |
| 53 | |
| 54 | src.timeOfLastRTPSent = 0; // we_sent = false; |
| 55 | src.setValidated(true); |
| 56 | |
| 57 | invalidMap.remove(Long.valueOf(SSRC)); |
| 58 | membersMap.put(Long.valueOf(SSRC), src); |
| 59 | } |
| 60 | |
| 61 | /** |
| 62 | * Vytvori clena v Members a Senders tabulkach a oznaci jej jako Valid. |
| 63 | * Pokud nektery z nich jiz existuje, nic se nedeje. |
| 64 | * Tato akce je volana pri prijeti RTP packetu. |
| 65 | * |
| 66 | * @param seqNo the seq no |
| 67 | * @param SSRC the SSRC |
| 68 | */ |
| 69 | protected synchronized void addSender(long SSRC, long seqNo) { |
| 70 | Source src = invalidMap.get(Long.valueOf(SSRC)); |
| 71 | // is invalid |
| 72 | if(src!=null){ |
| 73 | validate(SSRC); |
| 74 | } else { |
| 75 | // is validated or doesno exists (null) |
| 76 | src = membersMap.get(Long.valueOf(SSRC)); |
| 77 | if(src == null){ |
| 78 | // vubec neexistuje |
| 79 | src = addMember(SSRC, seqNo); |
| 80 | } |
| 81 | } |
| 82 | sendersMap.put(Long.valueOf(SSRC), src); |
| 83 | |
| 84 | // nastavi Source jako ze odeslal v tento cas |
| 85 | src.timeOfLastRTPSent = System.currentTimeMillis(); |
| 86 | src.setValidated(true); |
| 87 | |
| 88 | invalidMap.remove(Long.valueOf(SSRC)); |
| 89 | membersMap.put(Long.valueOf(SSRC), src); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Odstrani z tabulky clenu. |
| 94 | * |
| 95 | * @param SSRC the SSRC |
| 96 | */ |
| 97 | protected synchronized void expireSender(long SSRC) { |
| 98 | assert existSender(SSRC): "Pokus o vyprseni neexistujiciho sender:"+SSRC; |
| 99 | sendersMap.remove(Long.valueOf(SSRC)); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Odstrani z tabulky clenu. |
| 104 | * |
| 105 | * @param SSRC the SSRC |
| 106 | */ |
| 107 | public synchronized void removeMember(long SSRC) { |
| 108 | sendersMap.remove(Long.valueOf(SSRC)); |
| 109 | membersMap.remove(Long.valueOf(SSRC)); |
| 110 | invalidMap.remove(Long.valueOf(SSRC)); |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Expire member. |
| 115 | * |
| 116 | * @param SSRC the SSRC |
| 117 | */ |
| 118 | protected synchronized void expireMember(long SSRC) { |
| 119 | assert existMember(SSRC): "Pokus o vyprseni neexistujiciho member:"+SSRC; |
| 120 | assert !existInvalid(SSRC): "Pokus o vyprseni neexistujiciho member:"+SSRC; |
| 121 | |
| 122 | Long ssrc = Long.valueOf(SSRC); |
| 123 | Source src = membersMap.get(ssrc); |
| 124 | src.probation = Source.MIN_SEQUENTIAL; |
| 125 | |
| 126 | membersMap.remove(ssrc); |
| 127 | invalidMap.put(ssrc, src); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Expire invalid. |
| 132 | * |
| 133 | * @param SSRC the SSRC |
| 134 | */ |
| 135 | protected synchronized void expireInvalid(long SSRC) { |
| 136 | assert !existSender(SSRC): "Pokus o vyprseni z invalid - sender je stale aktivni member:"+SSRC; |
| 137 | assert !existMember(SSRC): "Pokus o vyprseni z invalid - member je stale aktivni member:"+SSRC; |
| 138 | assert existInvalid(SSRC): "Pokus o vyprseni neexistujiciho member:"+SSRC; |
| 139 | |
| 140 | Long ssrc = Long.valueOf(SSRC); |
| 141 | Source src = invalidMap.get(ssrc); |
| 142 | src.probation = Source.MIN_SEQUENTIAL; |
| 143 | |
| 144 | invalidMap.remove(ssrc); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Gets the invalid count. |
| 149 | * |
| 150 | * @return count of invalid members |
| 151 | */ |
| 152 | public synchronized int getInvalidCount() { |
| 153 | return invalidMap.size(); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Gets the members count. |
| 158 | * |
| 159 | * @return count of valid members |
| 160 | */ |
| 161 | public synchronized int getMembersCount() { |
| 162 | return membersMap.size(); |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Gets the senders count. |
| 167 | * |
| 168 | * @return count of senders |
| 169 | */ |
| 170 | public synchronized int getSendersCount() { |
| 171 | return sendersMap.size(); |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Gets the member. |
| 176 | * |
| 177 | * @param SSRC the SSRC |
| 178 | * |
| 179 | * @return the member |
| 180 | */ |
| 181 | public synchronized Source getMember(long SSRC) { |
| 182 | return membersMap.get(Long.valueOf(SSRC)); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Gets the member or create member. |
| 187 | * |
| 188 | * @param SSRC the SSRC |
| 189 | * |
| 190 | * @return the member or create member |
| 191 | */ |
| 192 | public synchronized Source getMemberOrCreateMember(long SSRC) { |
| 193 | // get from members map |
| 194 | Source src = membersMap.get(Long.valueOf(SSRC)); |
| 195 | // get from invalidsMap |
| 196 | if(src == null){ |
| 197 | src = invalidMap.get(Long.valueOf(SSRC)); |
| 198 | } |
| 199 | // create new |
| 200 | if(src == null){ |
| 201 | src = addMember(SSRC, 0); |
| 202 | } |
| 203 | return src; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Gets the member or invalid. |
| 208 | * |
| 209 | * @param SSRC the SSRC |
| 210 | * |
| 211 | * @return the member or invalid |
| 212 | */ |
| 213 | public synchronized Source getMemberOrInvalid(long SSRC) { |
| 214 | Source src = membersMap.get(Long.valueOf(SSRC)); |
| 215 | if(src == null){ |
| 216 | src = invalidMap.get(Long.valueOf(SSRC)); |
| 217 | } |
| 218 | assert src != null : "Member nenalezen ("+SSRC+")\n"+printMembersInfo(); |
| 219 | printMembersInfo(); |
| 220 | return src; |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Exist sender. |
| 225 | * |
| 226 | * @param SSRC the SSRC |
| 227 | * |
| 228 | * @return true, if exist sender |
| 229 | */ |
| 230 | private synchronized boolean existSender(long SSRC) { |
| 231 | return sendersMap.get(Long.valueOf(SSRC))!= null; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Exist member. |
| 236 | * |
| 237 | * @param SSRC the SSRC |
| 238 | * |
| 239 | * @return true, if exist member |
| 240 | */ |
| 241 | public synchronized boolean existMember(long SSRC) { |
| 242 | return membersMap.get(Long.valueOf(SSRC))!= null; |
| 243 | } |
| 244 | |
| 245 | /** |
| 246 | * Exist invalid. |
| 247 | * |
| 248 | * @param SSRC the SSRC |
| 249 | * |
| 250 | * @return true, if exist invalid |
| 251 | */ |
| 252 | public synchronized boolean existInvalid(long SSRC) { |
| 253 | return invalidMap.get(Long.valueOf(SSRC))!= null; |
| 254 | } |
| 255 | |
| 256 | /** |
| 257 | * Prints the members info. |
| 258 | * |
| 259 | * @return the string |
| 260 | */ |
| 261 | protected String printMembersInfo() { |
| 262 | String msg = "INVALID(" + getInvalidCount()+") "; |
| 263 | msg += "MEMBERS(" + getMembersCount()+") "; |
| 264 | msg += "SENDERS(" + getSendersCount()+") "; |
| 265 | msg += " |"+membersMap+" |"; |
| 266 | msg += invalidMap+" | "; |
| 267 | msg += sendersMap+" | "; |
| 268 | return msg; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * Gets the senders table. |
| 273 | * |
| 274 | * @return the senders table |
| 275 | */ |
| 276 | public Enumeration<Source> getSendersTable() { |
| 277 | return sendersMap.elements(); |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * Gets the members table. |
| 282 | * |
| 283 | * @return the members table |
| 284 | */ |
| 285 | public Enumeration<Source> getMembersTable() { |
| 286 | return membersMap.elements(); |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Gets the previous memebers count. |
| 291 | * |
| 292 | * @return the previous memebers count |
| 293 | */ |
| 294 | public int getPreviousMemebersCount() { |
| 295 | return previousMemebersCount; |
| 296 | } |
| 297 | |
| 298 | /** |
| 299 | * Sets the previous memebers count. |
| 300 | * |
| 301 | * @param previousMemebersCount the previous memebers count |
| 302 | */ |
| 303 | public void setPreviousMemebersCount(int previousMemebersCount) { |
| 304 | this.previousMemebersCount = previousMemebersCount; |
| 305 | } |
| 306 | |
| 307 | } |