ARTPSession.cpp revision f8ca90452ff3e252f20de38f1c3eee524c808c3e
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#include "ARTPSession.h" 18 19#include <media/stagefright/foundation/ABuffer.h> 20#include <media/stagefright/foundation/ADebug.h> 21#include <media/stagefright/foundation/AMessage.h> 22#include <media/stagefright/foundation/hexdump.h> 23 24#include <ctype.h> 25#include <arpa/inet.h> 26#include <sys/socket.h> 27 28#include "APacketSource.h" 29#include "ARTPConnection.h" 30#include "ASessionDescription.h" 31 32namespace android { 33 34ARTPSession::ARTPSession() 35 : mInitCheck(NO_INIT) { 36} 37 38status_t ARTPSession::setup(const sp<ASessionDescription> &desc) { 39 CHECK_EQ(mInitCheck, (status_t)NO_INIT); 40 41 mDesc = desc; 42 43 mRTPConn = new ARTPConnection( 44 ARTPConnection::kFakeTimestamps 45 | ARTPConnection::kRegularlyRequestFIR); 46 47 looper()->registerHandler(mRTPConn); 48 49 for (size_t i = 1; i < mDesc->countTracks(); ++i) { 50 AString connection; 51 if (!mDesc->findAttribute(i, "c=", &connection)) { 52 // No per-stream connection information, try global fallback. 53 if (!mDesc->findAttribute(0, "c=", &connection)) { 54 LOG(ERROR) << "Unable to find connection attribtue."; 55 return mInitCheck; 56 } 57 } 58 if (!(connection == "IN IP4 127.0.0.1")) { 59 LOG(ERROR) << "We only support localhost connections for now."; 60 return mInitCheck; 61 } 62 63 unsigned port; 64 if (!validateMediaFormat(i, &port) || (port & 1) != 0) { 65 LOG(ERROR) << "Invalid media format."; 66 return mInitCheck; 67 } 68 69 sp<APacketSource> source = new APacketSource(mDesc, i); 70 if (source->initCheck() != OK) { 71 LOG(ERROR) << "Unsupported format."; 72 return mInitCheck; 73 } 74 75 int rtpSocket = MakeUDPSocket(port); 76 int rtcpSocket = MakeUDPSocket(port + 1); 77 78 mTracks.push(TrackInfo()); 79 TrackInfo *info = &mTracks.editItemAt(mTracks.size() - 1); 80 info->mRTPSocket = rtpSocket; 81 info->mRTCPSocket = rtcpSocket; 82 83 sp<AMessage> notify = new AMessage(kWhatAccessUnitComplete, id()); 84 notify->setSize("track-index", mTracks.size() - 1); 85 86 mRTPConn->addStream(rtpSocket, rtcpSocket, mDesc, i, notify); 87 88 info->mPacketSource = source; 89 } 90 91 mInitCheck = OK; 92 93 return OK; 94} 95 96// static 97int ARTPSession::MakeUDPSocket(unsigned port) { 98 int s = socket(AF_INET, SOCK_DGRAM, 0); 99 CHECK_GE(s, 0); 100 101 struct sockaddr_in addr; 102 memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); 103 addr.sin_family = AF_INET; 104 addr.sin_addr.s_addr = INADDR_ANY; 105 addr.sin_port = htons(port); 106 107 CHECK_EQ(0, bind(s, (const struct sockaddr *)&addr, sizeof(addr))); 108 109 return s; 110} 111 112ARTPSession::~ARTPSession() { 113 for (size_t i = 0; i < mTracks.size(); ++i) { 114 TrackInfo *info = &mTracks.editItemAt(i); 115 116 info->mPacketSource->signalEOS(UNKNOWN_ERROR); 117 118 close(info->mRTPSocket); 119 close(info->mRTCPSocket); 120 } 121} 122 123void ARTPSession::onMessageReceived(const sp<AMessage> &msg) { 124 switch (msg->what()) { 125 case kWhatAccessUnitComplete: 126 { 127 size_t trackIndex; 128 CHECK(msg->findSize("track-index", &trackIndex)); 129 130 int32_t eos; 131 if (msg->findInt32("eos", &eos) && eos) { 132 TrackInfo *info = &mTracks.editItemAt(trackIndex); 133 info->mPacketSource->signalEOS(ERROR_END_OF_STREAM); 134 break; 135 } 136 137 sp<RefBase> obj; 138 CHECK(msg->findObject("access-unit", &obj)); 139 140 sp<ABuffer> accessUnit = static_cast<ABuffer *>(obj.get()); 141 142 uint64_t ntpTime; 143 CHECK(accessUnit->meta()->findInt64( 144 "ntp-time", (int64_t *)&ntpTime)); 145 146#if 0 147#if 0 148 printf("access unit complete size=%d\tntp-time=0x%016llx\n", 149 accessUnit->size(), ntpTime); 150#else 151 LOG(INFO) << "access unit complete, " 152 << "size=" << accessUnit->size() << ", " 153 << "ntp-time=" << ntpTime; 154 hexdump(accessUnit->data(), accessUnit->size()); 155#endif 156#endif 157 158#if 0 159 CHECK_GE(accessUnit->size(), 5u); 160 CHECK(!memcmp("\x00\x00\x00\x01", accessUnit->data(), 4)); 161 unsigned x = accessUnit->data()[4]; 162 163 LOG(INFO) << "access unit complete: " 164 << StringPrintf("nalType=0x%02x, nalRefIdc=0x%02x", 165 x & 0x1f, (x & 0x60) >> 5); 166#endif 167 168 accessUnit->meta()->setInt64("ntp-time", ntpTime); 169 170#if 0 171 int32_t damaged; 172 if (accessUnit->meta()->findInt32("damaged", &damaged) 173 && damaged != 0) { 174 LOG(INFO) << "ignoring damaged AU"; 175 } else 176#endif 177 { 178 TrackInfo *info = &mTracks.editItemAt(trackIndex); 179 info->mPacketSource->queueAccessUnit(accessUnit); 180 } 181 break; 182 } 183 184 default: 185 TRESPASS(); 186 break; 187 } 188} 189 190bool ARTPSession::validateMediaFormat(size_t index, unsigned *port) const { 191 AString format; 192 mDesc->getFormat(index, &format); 193 194 ssize_t i = format.find(" "); 195 if (i < 0) { 196 return false; 197 } 198 199 ++i; 200 size_t j = i; 201 while (isdigit(format.c_str()[j])) { 202 ++j; 203 } 204 if (format.c_str()[j] != ' ') { 205 return false; 206 } 207 208 AString portString(format, i, j - i); 209 210 char *end; 211 unsigned long x = strtoul(portString.c_str(), &end, 10); 212 if (end == portString.c_str() || *end != '\0') { 213 return false; 214 } 215 216 if (x == 0 || x > 65535) { 217 return false; 218 } 219 220 *port = x; 221 222 return true; 223} 224 225size_t ARTPSession::countTracks() { 226 return mTracks.size(); 227} 228 229sp<MediaSource> ARTPSession::trackAt(size_t index) { 230 CHECK_LT(index, mTracks.size()); 231 return mTracks.editItemAt(index).mPacketSource; 232} 233 234} // namespace android 235