Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 17 | //#define LOG_NDEBUG 0 |
| 18 | #define LOG_TAG "ARTPConnection" |
| 19 | #include <utils/Log.h> |
| 20 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 21 | #include "ARTPConnection.h" |
| 22 | |
| 23 | #include "ARTPSource.h" |
| 24 | #include "ASessionDescription.h" |
| 25 | |
| 26 | #include <media/stagefright/foundation/ABuffer.h> |
| 27 | #include <media/stagefright/foundation/ADebug.h> |
| 28 | #include <media/stagefright/foundation/AMessage.h> |
| 29 | #include <media/stagefright/foundation/AString.h> |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 30 | #include <media/stagefright/foundation/hexdump.h> |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 31 | |
| 32 | #include <arpa/inet.h> |
| 33 | #include <sys/socket.h> |
| 34 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 35 | namespace android { |
| 36 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 37 | static const size_t kMaxUDPSize = 1500; |
| 38 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 39 | static uint16_t u16at(const uint8_t *data) { |
| 40 | return data[0] << 8 | data[1]; |
| 41 | } |
| 42 | |
| 43 | static uint32_t u32at(const uint8_t *data) { |
| 44 | return u16at(data) << 16 | u16at(&data[2]); |
| 45 | } |
| 46 | |
| 47 | static uint64_t u64at(const uint8_t *data) { |
| 48 | return (uint64_t)(u32at(data)) << 32 | u32at(&data[4]); |
| 49 | } |
| 50 | |
| 51 | // static |
| 52 | const int64_t ARTPConnection::kSelectTimeoutUs = 1000ll; |
| 53 | |
| 54 | struct ARTPConnection::StreamInfo { |
| 55 | int mRTPSocket; |
| 56 | int mRTCPSocket; |
| 57 | sp<ASessionDescription> mSessionDesc; |
| 58 | size_t mIndex; |
| 59 | sp<AMessage> mNotifyMsg; |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 60 | KeyedVector<uint32_t, sp<ARTPSource> > mSources; |
| 61 | |
Andreas Huber | cc5fb1d | 2010-10-13 12:15:03 -0700 | [diff] [blame] | 62 | int64_t mNumRTCPPacketsReceived; |
| 63 | int64_t mNumRTPPacketsReceived; |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 64 | struct sockaddr_in mRemoteRTCPAddr; |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 65 | |
| 66 | bool mIsInjected; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 67 | }; |
| 68 | |
Andreas Huber | f88f844 | 2010-08-10 11:18:36 -0700 | [diff] [blame] | 69 | ARTPConnection::ARTPConnection(uint32_t flags) |
| 70 | : mFlags(flags), |
| 71 | mPollEventPending(false), |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 72 | mLastReceiverReportTimeUs(-1) { |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | ARTPConnection::~ARTPConnection() { |
| 76 | } |
| 77 | |
| 78 | void ARTPConnection::addStream( |
| 79 | int rtpSocket, int rtcpSocket, |
| 80 | const sp<ASessionDescription> &sessionDesc, |
| 81 | size_t index, |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 82 | const sp<AMessage> ¬ify, |
| 83 | bool injected) { |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 84 | sp<AMessage> msg = new AMessage(kWhatAddStream, id()); |
| 85 | msg->setInt32("rtp-socket", rtpSocket); |
| 86 | msg->setInt32("rtcp-socket", rtcpSocket); |
| 87 | msg->setObject("session-desc", sessionDesc); |
| 88 | msg->setSize("index", index); |
| 89 | msg->setMessage("notify", notify); |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 90 | msg->setInt32("injected", injected); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 91 | msg->post(); |
| 92 | } |
| 93 | |
| 94 | void ARTPConnection::removeStream(int rtpSocket, int rtcpSocket) { |
| 95 | sp<AMessage> msg = new AMessage(kWhatRemoveStream, id()); |
| 96 | msg->setInt32("rtp-socket", rtpSocket); |
| 97 | msg->setInt32("rtcp-socket", rtcpSocket); |
| 98 | msg->post(); |
| 99 | } |
| 100 | |
| 101 | static void bumpSocketBufferSize(int s) { |
| 102 | int size = 256 * 1024; |
| 103 | CHECK_EQ(setsockopt(s, SOL_SOCKET, SO_RCVBUF, &size, sizeof(size)), 0); |
| 104 | } |
| 105 | |
| 106 | // static |
| 107 | void ARTPConnection::MakePortPair( |
| 108 | int *rtpSocket, int *rtcpSocket, unsigned *rtpPort) { |
| 109 | *rtpSocket = socket(AF_INET, SOCK_DGRAM, 0); |
| 110 | CHECK_GE(*rtpSocket, 0); |
| 111 | |
| 112 | bumpSocketBufferSize(*rtpSocket); |
| 113 | |
| 114 | *rtcpSocket = socket(AF_INET, SOCK_DGRAM, 0); |
| 115 | CHECK_GE(*rtcpSocket, 0); |
| 116 | |
| 117 | bumpSocketBufferSize(*rtcpSocket); |
| 118 | |
| 119 | unsigned start = (rand() * 1000)/ RAND_MAX + 15550; |
| 120 | start &= ~1; |
| 121 | |
| 122 | for (unsigned port = start; port < 65536; port += 2) { |
| 123 | struct sockaddr_in addr; |
| 124 | memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); |
| 125 | addr.sin_family = AF_INET; |
Andreas Huber | 0407269 | 2011-02-15 10:39:48 -0800 | [diff] [blame] | 126 | addr.sin_addr.s_addr = htonl(INADDR_ANY); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 127 | addr.sin_port = htons(port); |
| 128 | |
| 129 | if (bind(*rtpSocket, |
| 130 | (const struct sockaddr *)&addr, sizeof(addr)) < 0) { |
| 131 | continue; |
| 132 | } |
| 133 | |
| 134 | addr.sin_port = htons(port + 1); |
| 135 | |
| 136 | if (bind(*rtcpSocket, |
| 137 | (const struct sockaddr *)&addr, sizeof(addr)) == 0) { |
| 138 | *rtpPort = port; |
| 139 | return; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | TRESPASS(); |
| 144 | } |
| 145 | |
| 146 | void ARTPConnection::onMessageReceived(const sp<AMessage> &msg) { |
| 147 | switch (msg->what()) { |
| 148 | case kWhatAddStream: |
| 149 | { |
| 150 | onAddStream(msg); |
| 151 | break; |
| 152 | } |
| 153 | |
| 154 | case kWhatRemoveStream: |
| 155 | { |
| 156 | onRemoveStream(msg); |
| 157 | break; |
| 158 | } |
| 159 | |
| 160 | case kWhatPollStreams: |
| 161 | { |
| 162 | onPollStreams(); |
| 163 | break; |
| 164 | } |
| 165 | |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 166 | case kWhatInjectPacket: |
| 167 | { |
| 168 | onInjectPacket(msg); |
| 169 | break; |
| 170 | } |
| 171 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 172 | default: |
| 173 | { |
| 174 | TRESPASS(); |
| 175 | break; |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | void ARTPConnection::onAddStream(const sp<AMessage> &msg) { |
| 181 | mStreams.push_back(StreamInfo()); |
| 182 | StreamInfo *info = &*--mStreams.end(); |
| 183 | |
| 184 | int32_t s; |
| 185 | CHECK(msg->findInt32("rtp-socket", &s)); |
| 186 | info->mRTPSocket = s; |
| 187 | CHECK(msg->findInt32("rtcp-socket", &s)); |
| 188 | info->mRTCPSocket = s; |
| 189 | |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 190 | int32_t injected; |
| 191 | CHECK(msg->findInt32("injected", &injected)); |
| 192 | |
| 193 | info->mIsInjected = injected; |
| 194 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 195 | sp<RefBase> obj; |
| 196 | CHECK(msg->findObject("session-desc", &obj)); |
| 197 | info->mSessionDesc = static_cast<ASessionDescription *>(obj.get()); |
| 198 | |
| 199 | CHECK(msg->findSize("index", &info->mIndex)); |
| 200 | CHECK(msg->findMessage("notify", &info->mNotifyMsg)); |
| 201 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 202 | info->mNumRTCPPacketsReceived = 0; |
Andreas Huber | cc5fb1d | 2010-10-13 12:15:03 -0700 | [diff] [blame] | 203 | info->mNumRTPPacketsReceived = 0; |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 204 | memset(&info->mRemoteRTCPAddr, 0, sizeof(info->mRemoteRTCPAddr)); |
| 205 | |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 206 | if (!injected) { |
| 207 | postPollEvent(); |
| 208 | } |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | void ARTPConnection::onRemoveStream(const sp<AMessage> &msg) { |
| 212 | int32_t rtpSocket, rtcpSocket; |
| 213 | CHECK(msg->findInt32("rtp-socket", &rtpSocket)); |
| 214 | CHECK(msg->findInt32("rtcp-socket", &rtcpSocket)); |
| 215 | |
| 216 | List<StreamInfo>::iterator it = mStreams.begin(); |
| 217 | while (it != mStreams.end() |
| 218 | && (it->mRTPSocket != rtpSocket || it->mRTCPSocket != rtcpSocket)) { |
| 219 | ++it; |
| 220 | } |
| 221 | |
| 222 | if (it == mStreams.end()) { |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 223 | return; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | mStreams.erase(it); |
| 227 | } |
| 228 | |
| 229 | void ARTPConnection::postPollEvent() { |
| 230 | if (mPollEventPending) { |
| 231 | return; |
| 232 | } |
| 233 | |
| 234 | sp<AMessage> msg = new AMessage(kWhatPollStreams, id()); |
| 235 | msg->post(); |
| 236 | |
| 237 | mPollEventPending = true; |
| 238 | } |
| 239 | |
| 240 | void ARTPConnection::onPollStreams() { |
| 241 | mPollEventPending = false; |
| 242 | |
| 243 | if (mStreams.empty()) { |
| 244 | return; |
| 245 | } |
| 246 | |
| 247 | struct timeval tv; |
| 248 | tv.tv_sec = 0; |
| 249 | tv.tv_usec = kSelectTimeoutUs; |
| 250 | |
| 251 | fd_set rs; |
| 252 | FD_ZERO(&rs); |
| 253 | |
| 254 | int maxSocket = -1; |
| 255 | for (List<StreamInfo>::iterator it = mStreams.begin(); |
| 256 | it != mStreams.end(); ++it) { |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 257 | if ((*it).mIsInjected) { |
| 258 | continue; |
| 259 | } |
| 260 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 261 | FD_SET(it->mRTPSocket, &rs); |
| 262 | FD_SET(it->mRTCPSocket, &rs); |
| 263 | |
| 264 | if (it->mRTPSocket > maxSocket) { |
| 265 | maxSocket = it->mRTPSocket; |
| 266 | } |
| 267 | if (it->mRTCPSocket > maxSocket) { |
| 268 | maxSocket = it->mRTCPSocket; |
| 269 | } |
| 270 | } |
| 271 | |
Andreas Huber | f88ca7a0 | 2010-08-30 15:25:35 -0700 | [diff] [blame] | 272 | if (maxSocket == -1) { |
| 273 | return; |
| 274 | } |
| 275 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 276 | int res = select(maxSocket + 1, &rs, NULL, NULL, &tv); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 277 | |
| 278 | if (res > 0) { |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 279 | List<StreamInfo>::iterator it = mStreams.begin(); |
| 280 | while (it != mStreams.end()) { |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 281 | if ((*it).mIsInjected) { |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 282 | ++it; |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 283 | continue; |
| 284 | } |
| 285 | |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 286 | status_t err = OK; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 287 | if (FD_ISSET(it->mRTPSocket, &rs)) { |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 288 | err = receive(&*it, true); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 289 | } |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 290 | if (err == OK && FD_ISSET(it->mRTCPSocket, &rs)) { |
| 291 | err = receive(&*it, false); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 292 | } |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 293 | |
| 294 | if (err == -ECONNRESET) { |
| 295 | // socket failure, this stream is dead, Jim. |
| 296 | |
| 297 | LOGW("failed to receive RTP/RTCP datagram."); |
| 298 | it = mStreams.erase(it); |
| 299 | continue; |
| 300 | } |
| 301 | |
| 302 | ++it; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 303 | } |
| 304 | } |
| 305 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 306 | int64_t nowUs = ALooper::GetNowUs(); |
| 307 | if (mLastReceiverReportTimeUs <= 0 |
| 308 | || mLastReceiverReportTimeUs + 5000000ll <= nowUs) { |
| 309 | sp<ABuffer> buffer = new ABuffer(kMaxUDPSize); |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 310 | List<StreamInfo>::iterator it = mStreams.begin(); |
| 311 | while (it != mStreams.end()) { |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 312 | StreamInfo *s = &*it; |
| 313 | |
Andreas Huber | f88ca7a0 | 2010-08-30 15:25:35 -0700 | [diff] [blame] | 314 | if (s->mIsInjected) { |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 315 | ++it; |
Andreas Huber | f88ca7a0 | 2010-08-30 15:25:35 -0700 | [diff] [blame] | 316 | continue; |
| 317 | } |
| 318 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 319 | if (s->mNumRTCPPacketsReceived == 0) { |
| 320 | // We have never received any RTCP packets on this stream, |
| 321 | // we don't even know where to send a report. |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 322 | ++it; |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 323 | continue; |
| 324 | } |
| 325 | |
| 326 | buffer->setRange(0, 0); |
| 327 | |
| 328 | for (size_t i = 0; i < s->mSources.size(); ++i) { |
| 329 | sp<ARTPSource> source = s->mSources.valueAt(i); |
| 330 | |
| 331 | source->addReceiverReport(buffer); |
Andreas Huber | f88f844 | 2010-08-10 11:18:36 -0700 | [diff] [blame] | 332 | |
| 333 | if (mFlags & kRegularlyRequestFIR) { |
| 334 | source->addFIR(buffer); |
| 335 | } |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | if (buffer->size() > 0) { |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 339 | ALOGV("Sending RR..."); |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 340 | |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 341 | ssize_t n; |
| 342 | do { |
| 343 | n = sendto( |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 344 | s->mRTCPSocket, buffer->data(), buffer->size(), 0, |
| 345 | (const struct sockaddr *)&s->mRemoteRTCPAddr, |
| 346 | sizeof(s->mRemoteRTCPAddr)); |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 347 | } while (n < 0 && errno == EINTR); |
| 348 | |
| 349 | if (n <= 0) { |
| 350 | LOGW("failed to send RTCP receiver report (%s).", |
| 351 | n == 0 ? "connection gone" : strerror(errno)); |
| 352 | |
| 353 | it = mStreams.erase(it); |
| 354 | continue; |
| 355 | } |
| 356 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 357 | CHECK_EQ(n, (ssize_t)buffer->size()); |
| 358 | |
| 359 | mLastReceiverReportTimeUs = nowUs; |
| 360 | } |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 361 | |
| 362 | ++it; |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 363 | } |
| 364 | } |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 365 | |
| 366 | if (!mStreams.empty()) { |
| 367 | postPollEvent(); |
| 368 | } |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | status_t ARTPConnection::receive(StreamInfo *s, bool receiveRTP) { |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 372 | ALOGV("receiving %s", receiveRTP ? "RTP" : "RTCP"); |
Andreas Huber | 0407269 | 2011-02-15 10:39:48 -0800 | [diff] [blame] | 373 | |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 374 | CHECK(!s->mIsInjected); |
| 375 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 376 | sp<ABuffer> buffer = new ABuffer(65536); |
| 377 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 378 | socklen_t remoteAddrLen = |
| 379 | (!receiveRTP && s->mNumRTCPPacketsReceived == 0) |
| 380 | ? sizeof(s->mRemoteRTCPAddr) : 0; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 381 | |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 382 | ssize_t nbytes; |
| 383 | do { |
| 384 | nbytes = recvfrom( |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 385 | receiveRTP ? s->mRTPSocket : s->mRTCPSocket, |
| 386 | buffer->data(), |
| 387 | buffer->capacity(), |
| 388 | 0, |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 389 | remoteAddrLen > 0 ? (struct sockaddr *)&s->mRemoteRTCPAddr : NULL, |
| 390 | remoteAddrLen > 0 ? &remoteAddrLen : NULL); |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 391 | } while (nbytes < 0 && errno == EINTR); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 392 | |
Andreas Huber | 05079be | 2011-11-09 14:26:43 -0800 | [diff] [blame] | 393 | if (nbytes <= 0) { |
| 394 | return -ECONNRESET; |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 395 | } |
| 396 | |
| 397 | buffer->setRange(0, nbytes); |
| 398 | |
Steve Block | 6215d3f | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 399 | // ALOGI("received %d bytes.", buffer->size()); |
Andreas Huber | a979ad6 | 2010-08-19 10:56:15 -0700 | [diff] [blame] | 400 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 401 | status_t err; |
| 402 | if (receiveRTP) { |
| 403 | err = parseRTP(s, buffer); |
| 404 | } else { |
| 405 | err = parseRTCP(s, buffer); |
| 406 | } |
| 407 | |
| 408 | return err; |
| 409 | } |
| 410 | |
| 411 | status_t ARTPConnection::parseRTP(StreamInfo *s, const sp<ABuffer> &buffer) { |
Andreas Huber | cc5fb1d | 2010-10-13 12:15:03 -0700 | [diff] [blame] | 412 | if (s->mNumRTPPacketsReceived++ == 0) { |
| 413 | sp<AMessage> notify = s->mNotifyMsg->dup(); |
| 414 | notify->setInt32("first-rtp", true); |
| 415 | notify->post(); |
| 416 | } |
| 417 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 418 | size_t size = buffer->size(); |
| 419 | |
| 420 | if (size < 12) { |
| 421 | // Too short to be a valid RTP header. |
| 422 | return -1; |
| 423 | } |
| 424 | |
| 425 | const uint8_t *data = buffer->data(); |
| 426 | |
| 427 | if ((data[0] >> 6) != 2) { |
| 428 | // Unsupported version. |
| 429 | return -1; |
| 430 | } |
| 431 | |
| 432 | if (data[0] & 0x20) { |
| 433 | // Padding present. |
| 434 | |
| 435 | size_t paddingLength = data[size - 1]; |
| 436 | |
| 437 | if (paddingLength + 12 > size) { |
| 438 | // If we removed this much padding we'd end up with something |
| 439 | // that's too short to be a valid RTP header. |
| 440 | return -1; |
| 441 | } |
| 442 | |
| 443 | size -= paddingLength; |
| 444 | } |
| 445 | |
| 446 | int numCSRCs = data[0] & 0x0f; |
| 447 | |
| 448 | size_t payloadOffset = 12 + 4 * numCSRCs; |
| 449 | |
| 450 | if (size < payloadOffset) { |
| 451 | // Not enough data to fit the basic header and all the CSRC entries. |
| 452 | return -1; |
| 453 | } |
| 454 | |
| 455 | if (data[0] & 0x10) { |
| 456 | // Header eXtension present. |
| 457 | |
| 458 | if (size < payloadOffset + 4) { |
| 459 | // Not enough data to fit the basic header, all CSRC entries |
| 460 | // and the first 4 bytes of the extension header. |
| 461 | |
| 462 | return -1; |
| 463 | } |
| 464 | |
| 465 | const uint8_t *extensionData = &data[payloadOffset]; |
| 466 | |
| 467 | size_t extensionLength = |
| 468 | 4 * (extensionData[2] << 8 | extensionData[3]); |
| 469 | |
| 470 | if (size < payloadOffset + 4 + extensionLength) { |
| 471 | return -1; |
| 472 | } |
| 473 | |
| 474 | payloadOffset += 4 + extensionLength; |
| 475 | } |
| 476 | |
| 477 | uint32_t srcId = u32at(&data[8]); |
| 478 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 479 | sp<ARTPSource> source = findSource(s, srcId); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 480 | |
| 481 | uint32_t rtpTime = u32at(&data[4]); |
| 482 | |
| 483 | sp<AMessage> meta = buffer->meta(); |
| 484 | meta->setInt32("ssrc", srcId); |
| 485 | meta->setInt32("rtp-time", rtpTime); |
| 486 | meta->setInt32("PT", data[1] & 0x7f); |
| 487 | meta->setInt32("M", data[1] >> 7); |
| 488 | |
| 489 | buffer->setInt32Data(u16at(&data[2])); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 490 | buffer->setRange(payloadOffset, size - payloadOffset); |
| 491 | |
| 492 | source->processRTPPacket(buffer); |
| 493 | |
| 494 | return OK; |
| 495 | } |
| 496 | |
| 497 | status_t ARTPConnection::parseRTCP(StreamInfo *s, const sp<ABuffer> &buffer) { |
Andreas Huber | 3a48d4d | 2010-08-31 10:43:47 -0700 | [diff] [blame] | 498 | if (s->mNumRTCPPacketsReceived++ == 0) { |
| 499 | sp<AMessage> notify = s->mNotifyMsg->dup(); |
| 500 | notify->setInt32("first-rtcp", true); |
| 501 | notify->post(); |
| 502 | } |
| 503 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 504 | const uint8_t *data = buffer->data(); |
| 505 | size_t size = buffer->size(); |
| 506 | |
| 507 | while (size > 0) { |
| 508 | if (size < 8) { |
| 509 | // Too short to be a valid RTCP header |
| 510 | return -1; |
| 511 | } |
| 512 | |
| 513 | if ((data[0] >> 6) != 2) { |
| 514 | // Unsupported version. |
| 515 | return -1; |
| 516 | } |
| 517 | |
| 518 | if (data[0] & 0x20) { |
| 519 | // Padding present. |
| 520 | |
| 521 | size_t paddingLength = data[size - 1]; |
| 522 | |
| 523 | if (paddingLength + 12 > size) { |
| 524 | // If we removed this much padding we'd end up with something |
| 525 | // that's too short to be a valid RTP header. |
| 526 | return -1; |
| 527 | } |
| 528 | |
| 529 | size -= paddingLength; |
| 530 | } |
| 531 | |
| 532 | size_t headerLength = 4 * (data[2] << 8 | data[3]) + 4; |
| 533 | |
| 534 | if (size < headerLength) { |
| 535 | // Only received a partial packet? |
| 536 | return -1; |
| 537 | } |
| 538 | |
| 539 | switch (data[1]) { |
| 540 | case 200: |
| 541 | { |
| 542 | parseSR(s, data, headerLength); |
| 543 | break; |
| 544 | } |
| 545 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 546 | case 201: // RR |
| 547 | case 202: // SDES |
| 548 | case 204: // APP |
| 549 | break; |
| 550 | |
| 551 | case 205: // TSFB (transport layer specific feedback) |
| 552 | case 206: // PSFB (payload specific feedback) |
| 553 | // hexdump(data, headerLength); |
| 554 | break; |
| 555 | |
| 556 | case 203: |
| 557 | { |
| 558 | parseBYE(s, data, headerLength); |
| 559 | break; |
| 560 | } |
| 561 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 562 | default: |
| 563 | { |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 564 | LOGW("Unknown RTCP packet type %u of size %d", |
| 565 | (unsigned)data[1], headerLength); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 566 | break; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | data += headerLength; |
| 571 | size -= headerLength; |
| 572 | } |
| 573 | |
| 574 | return OK; |
| 575 | } |
| 576 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 577 | status_t ARTPConnection::parseBYE( |
| 578 | StreamInfo *s, const uint8_t *data, size_t size) { |
| 579 | size_t SC = data[0] & 0x3f; |
| 580 | |
| 581 | if (SC == 0 || size < (4 + SC * 4)) { |
| 582 | // Packet too short for the minimal BYE header. |
| 583 | return -1; |
| 584 | } |
| 585 | |
| 586 | uint32_t id = u32at(&data[4]); |
| 587 | |
| 588 | sp<ARTPSource> source = findSource(s, id); |
| 589 | |
| 590 | source->byeReceived(); |
| 591 | |
| 592 | return OK; |
| 593 | } |
| 594 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 595 | status_t ARTPConnection::parseSR( |
| 596 | StreamInfo *s, const uint8_t *data, size_t size) { |
| 597 | size_t RC = data[0] & 0x1f; |
| 598 | |
| 599 | if (size < (7 + RC * 6) * 4) { |
| 600 | // Packet too short for the minimal SR header. |
| 601 | return -1; |
| 602 | } |
| 603 | |
| 604 | uint32_t id = u32at(&data[4]); |
| 605 | uint64_t ntpTime = u64at(&data[8]); |
| 606 | uint32_t rtpTime = u32at(&data[16]); |
| 607 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 608 | #if 0 |
Steve Block | 6215d3f | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 609 | ALOGI("XXX timeUpdate: ssrc=0x%08x, rtpTime %u == ntpTime %.3f", |
Andreas Huber | 6e3fa44 | 2010-09-21 13:13:15 -0700 | [diff] [blame] | 610 | id, |
| 611 | rtpTime, |
| 612 | (ntpTime >> 32) + (double)(ntpTime & 0xffffffff) / (1ll << 32)); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 613 | #endif |
| 614 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 615 | sp<ARTPSource> source = findSource(s, id); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 616 | |
Andreas Huber | b2934b1 | 2011-02-08 10:18:41 -0800 | [diff] [blame] | 617 | source->timeUpdate(rtpTime, ntpTime); |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 622 | sp<ARTPSource> ARTPConnection::findSource(StreamInfo *info, uint32_t srcId) { |
| 623 | sp<ARTPSource> source; |
| 624 | ssize_t index = info->mSources.indexOfKey(srcId); |
| 625 | if (index < 0) { |
| 626 | index = info->mSources.size(); |
| 627 | |
| 628 | source = new ARTPSource( |
| 629 | srcId, info->mSessionDesc, info->mIndex, info->mNotifyMsg); |
| 630 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 631 | info->mSources.add(srcId, source); |
| 632 | } else { |
| 633 | source = info->mSources.valueAt(index); |
| 634 | } |
| 635 | |
| 636 | return source; |
| 637 | } |
| 638 | |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 639 | void ARTPConnection::injectPacket(int index, const sp<ABuffer> &buffer) { |
| 640 | sp<AMessage> msg = new AMessage(kWhatInjectPacket, id()); |
| 641 | msg->setInt32("index", index); |
| 642 | msg->setObject("buffer", buffer); |
| 643 | msg->post(); |
| 644 | } |
| 645 | |
| 646 | void ARTPConnection::onInjectPacket(const sp<AMessage> &msg) { |
| 647 | int32_t index; |
| 648 | CHECK(msg->findInt32("index", &index)); |
| 649 | |
| 650 | sp<RefBase> obj; |
| 651 | CHECK(msg->findObject("buffer", &obj)); |
| 652 | |
| 653 | sp<ABuffer> buffer = static_cast<ABuffer *>(obj.get()); |
| 654 | |
| 655 | List<StreamInfo>::iterator it = mStreams.begin(); |
| 656 | while (it != mStreams.end() |
| 657 | && it->mRTPSocket != index && it->mRTCPSocket != index) { |
| 658 | ++it; |
| 659 | } |
| 660 | |
| 661 | if (it == mStreams.end()) { |
| 662 | TRESPASS(); |
| 663 | } |
| 664 | |
| 665 | StreamInfo *s = &*it; |
| 666 | |
| 667 | status_t err; |
| 668 | if (it->mRTPSocket == index) { |
| 669 | err = parseRTP(s, buffer); |
| 670 | } else { |
Andreas Huber | 0416da7 | 2010-08-26 11:17:32 -0700 | [diff] [blame] | 671 | err = parseRTCP(s, buffer); |
| 672 | } |
| 673 | } |
| 674 | |
Andreas Huber | 7a747b8 | 2010-06-07 15:19:40 -0700 | [diff] [blame] | 675 | } // namespace android |
| 676 | |