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 17 //#define LOG_NDEBUG 0 18 #define LOG_TAG "ARTPSession" 19 #include <utils/Log.h> 20 21 #include "ARTPSession.h" 22 23 #include <media/stagefright/foundation/ABuffer.h> 24 #include <media/stagefright/foundation/ADebug.h> 25 #include <media/stagefright/foundation/AMessage.h> 26 #include <media/stagefright/foundation/hexdump.h> 27 28 #include <ctype.h> 29 #include <arpa/inet.h> 30 #include <sys/socket.h> 31 32 #include "APacketSource.h" 33 #include "ARTPConnection.h" 34 #include "ASessionDescription.h" 35 36 namespace android { 37 38 ARTPSession::ARTPSession() 39 : mInitCheck(NO_INIT) { 40 } 41 42 status_t ARTPSession::setup(const sp<ASessionDescription> &desc) { 43 CHECK_EQ(mInitCheck, (status_t)NO_INIT); 44 45 mDesc = desc; 46 47 mRTPConn = new ARTPConnection(ARTPConnection::kRegularlyRequestFIR); 48 49 looper()->registerHandler(mRTPConn); 50 51 for (size_t i = 1; i < mDesc->countTracks(); ++i) { 52 AString connection; 53 if (!mDesc->findAttribute(i, "c=", &connection)) { 54 // No per-stream connection information, try global fallback. 55 if (!mDesc->findAttribute(0, "c=", &connection)) { 56 ALOGE("Unable to find connection attribute."); 57 return mInitCheck; 58 } 59 } 60 if (!(connection == "IN IP4 127.0.0.1")) { 61 ALOGE("We only support localhost connections for now."); 62 return mInitCheck; 63 } 64 65 unsigned port; 66 if (!validateMediaFormat(i, &port) || (port & 1) != 0) { 67 ALOGE("Invalid media format."); 68 return mInitCheck; 69 } 70 71 sp<APacketSource> source = new APacketSource(mDesc, i); 72 if (source->initCheck() != OK) { 73 ALOGE("Unsupported format."); 74 return mInitCheck; 75 } 76 77 int rtpSocket = MakeUDPSocket(port); 78 int rtcpSocket = MakeUDPSocket(port + 1); 79 80 mTracks.push(TrackInfo()); 81 TrackInfo *info = &mTracks.editItemAt(mTracks.size() - 1); 82 info->mRTPSocket = rtpSocket; 83 info->mRTCPSocket = rtcpSocket; 84 85 sp<AMessage> notify = new AMessage(kWhatAccessUnitComplete, this); 86 notify->setSize("track-index", mTracks.size() - 1); 87 88 mRTPConn->addStream( 89 rtpSocket, rtcpSocket, mDesc, i, notify, false /* injected */); 90 91 info->mPacketSource = source; 92 } 93 94 mInitCheck = OK; 95 96 return OK; 97 } 98 99 // static 100 int ARTPSession::MakeUDPSocket(unsigned port) { 101 int s = socket(AF_INET, SOCK_DGRAM, 0); 102 CHECK_GE(s, 0); 103 104 struct sockaddr_in addr; 105 memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); 106 addr.sin_family = AF_INET; 107 addr.sin_addr.s_addr = INADDR_ANY; 108 addr.sin_port = htons(port); 109 110 CHECK_EQ(0, bind(s, (const struct sockaddr *)&addr, sizeof(addr))); 111 112 return s; 113 } 114 115 ARTPSession::~ARTPSession() { 116 for (size_t i = 0; i < mTracks.size(); ++i) { 117 TrackInfo *info = &mTracks.editItemAt(i); 118 119 info->mPacketSource->signalEOS(UNKNOWN_ERROR); 120 121 close(info->mRTPSocket); 122 close(info->mRTCPSocket); 123 } 124 } 125 126 void ARTPSession::onMessageReceived(const sp<AMessage> &msg) { 127 switch (msg->what()) { 128 case kWhatAccessUnitComplete: 129 { 130 int32_t firstRTCP; 131 if (msg->findInt32("first-rtcp", &firstRTCP)) { 132 // There won't be an access unit here, it's just a notification 133 // that the data communication worked since we got the first 134 // rtcp packet. 135 break; 136 } 137 138 size_t trackIndex; 139 CHECK(msg->findSize("track-index", &trackIndex)); 140 141 int32_t eos; 142 if (msg->findInt32("eos", &eos) && eos) { 143 TrackInfo *info = &mTracks.editItemAt(trackIndex); 144 info->mPacketSource->signalEOS(ERROR_END_OF_STREAM); 145 break; 146 } 147 148 sp<ABuffer> accessUnit; 149 CHECK(msg->findBuffer("access-unit", &accessUnit)); 150 151 uint64_t ntpTime; 152 CHECK(accessUnit->meta()->findInt64( 153 "ntp-time", (int64_t *)&ntpTime)); 154 155 #if 0 156 #if 0 157 printf("access unit complete size=%d\tntp-time=0x%016llx\n", 158 accessUnit->size(), ntpTime); 159 #else 160 ALOGI("access unit complete, size=%d, ntp-time=%llu", 161 accessUnit->size(), ntpTime); 162 hexdump(accessUnit->data(), accessUnit->size()); 163 #endif 164 #endif 165 166 #if 0 167 CHECK_GE(accessUnit->size(), 5u); 168 CHECK(!memcmp("\x00\x00\x00\x01", accessUnit->data(), 4)); 169 unsigned x = accessUnit->data()[4]; 170 171 ALOGI("access unit complete: nalType=0x%02x, nalRefIdc=0x%02x", 172 x & 0x1f, (x & 0x60) >> 5); 173 #endif 174 175 accessUnit->meta()->setInt64("ntp-time", ntpTime); 176 accessUnit->meta()->setInt64("timeUs", 0); 177 178 #if 0 179 int32_t damaged; 180 if (accessUnit->meta()->findInt32("damaged", &damaged) 181 && damaged != 0) { 182 ALOGI("ignoring damaged AU"); 183 } else 184 #endif 185 { 186 TrackInfo *info = &mTracks.editItemAt(trackIndex); 187 info->mPacketSource->queueAccessUnit(accessUnit); 188 } 189 break; 190 } 191 192 default: 193 TRESPASS(); 194 break; 195 } 196 } 197 198 bool ARTPSession::validateMediaFormat(size_t index, unsigned *port) const { 199 AString format; 200 mDesc->getFormat(index, &format); 201 202 ssize_t i = format.find(" "); 203 if (i < 0) { 204 return false; 205 } 206 207 ++i; 208 size_t j = i; 209 while (isdigit(format.c_str()[j])) { 210 ++j; 211 } 212 if (format.c_str()[j] != ' ') { 213 return false; 214 } 215 216 AString portString(format, i, j - i); 217 218 char *end; 219 unsigned long x = strtoul(portString.c_str(), &end, 10); 220 if (end == portString.c_str() || *end != '\0') { 221 return false; 222 } 223 224 if (x == 0 || x > 65535) { 225 return false; 226 } 227 228 *port = x; 229 230 return true; 231 } 232 233 size_t ARTPSession::countTracks() { 234 return mTracks.size(); 235 } 236 237 sp<MediaSource> ARTPSession::trackAt(size_t index) { 238 CHECK_LT(index, mTracks.size()); 239 return mTracks.editItemAt(index).mPacketSource; 240 } 241 242 } // namespace android 243
