ARTPSession.cpp revision b186054757f4743eb9a6d6e81d262b9c7b36bec7
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( 87 rtpSocket, rtcpSocket, mDesc, i, notify, false /* injected */); 88 89 info->mPacketSource = source; 90 } 91 92 mInitCheck = OK; 93 94 return OK; 95} 96 97// static 98int ARTPSession::MakeUDPSocket(unsigned port) { 99 int s = socket(AF_INET, SOCK_DGRAM, 0); 100 CHECK_GE(s, 0); 101 102 struct sockaddr_in addr; 103 memset(addr.sin_zero, 0, sizeof(addr.sin_zero)); 104 addr.sin_family = AF_INET; 105 addr.sin_addr.s_addr = INADDR_ANY; 106 addr.sin_port = htons(port); 107 108 CHECK_EQ(0, bind(s, (const struct sockaddr *)&addr, sizeof(addr))); 109 110 return s; 111} 112 113ARTPSession::~ARTPSession() { 114 for (size_t i = 0; i < mTracks.size(); ++i) { 115 TrackInfo *info = &mTracks.editItemAt(i); 116 117 info->mPacketSource->signalEOS(UNKNOWN_ERROR); 118 119 close(info->mRTPSocket); 120 close(info->mRTCPSocket); 121 } 122} 123 124void ARTPSession::onMessageReceived(const sp<AMessage> &msg) { 125 switch (msg->what()) { 126 case kWhatAccessUnitComplete: 127 { 128 size_t trackIndex; 129 CHECK(msg->findSize("track-index", &trackIndex)); 130 131 int32_t eos; 132 if (msg->findInt32("eos", &eos) && eos) { 133 TrackInfo *info = &mTracks.editItemAt(trackIndex); 134 info->mPacketSource->signalEOS(ERROR_END_OF_STREAM); 135 break; 136 } 137 138 sp<RefBase> obj; 139 CHECK(msg->findObject("access-unit", &obj)); 140 141 sp<ABuffer> accessUnit = static_cast<ABuffer *>(obj.get()); 142 143 uint64_t ntpTime; 144 CHECK(accessUnit->meta()->findInt64( 145 "ntp-time", (int64_t *)&ntpTime)); 146 147#if 0 148#if 0 149 printf("access unit complete size=%d\tntp-time=0x%016llx\n", 150 accessUnit->size(), ntpTime); 151#else 152 LOG(INFO) << "access unit complete, " 153 << "size=" << accessUnit->size() << ", " 154 << "ntp-time=" << ntpTime; 155 hexdump(accessUnit->data(), accessUnit->size()); 156#endif 157#endif 158 159#if 0 160 CHECK_GE(accessUnit->size(), 5u); 161 CHECK(!memcmp("\x00\x00\x00\x01", accessUnit->data(), 4)); 162 unsigned x = accessUnit->data()[4]; 163 164 LOG(INFO) << "access unit complete: " 165 << StringPrintf("nalType=0x%02x, nalRefIdc=0x%02x", 166 x & 0x1f, (x & 0x60) >> 5); 167#endif 168 169 accessUnit->meta()->setInt64("ntp-time", ntpTime); 170 accessUnit->meta()->setInt64("timeUs", 0); 171 172#if 0 173 int32_t damaged; 174 if (accessUnit->meta()->findInt32("damaged", &damaged) 175 && damaged != 0) { 176 LOG(INFO) << "ignoring damaged AU"; 177 } else 178#endif 179 { 180 TrackInfo *info = &mTracks.editItemAt(trackIndex); 181 info->mPacketSource->queueAccessUnit(accessUnit); 182 } 183 break; 184 } 185 186 default: 187 TRESPASS(); 188 break; 189 } 190} 191 192bool ARTPSession::validateMediaFormat(size_t index, unsigned *port) const { 193 AString format; 194 mDesc->getFormat(index, &format); 195 196 ssize_t i = format.find(" "); 197 if (i < 0) { 198 return false; 199 } 200 201 ++i; 202 size_t j = i; 203 while (isdigit(format.c_str()[j])) { 204 ++j; 205 } 206 if (format.c_str()[j] != ' ') { 207 return false; 208 } 209 210 AString portString(format, i, j - i); 211 212 char *end; 213 unsigned long x = strtoul(portString.c_str(), &end, 10); 214 if (end == portString.c_str() || *end != '\0') { 215 return false; 216 } 217 218 if (x == 0 || x > 65535) { 219 return false; 220 } 221 222 *port = x; 223 224 return true; 225} 226 227size_t ARTPSession::countTracks() { 228 return mTracks.size(); 229} 230 231sp<MediaSource> ARTPSession::trackAt(size_t index) { 232 CHECK_LT(index, mTracks.size()); 233 return mTracks.editItemAt(index).mPacketSource; 234} 235 236} // namespace android 237