HTTPLiveSource.cpp revision 06528d7f18ad01377357d337eaa3e875a242bd2d
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 "HTTPLiveSource" 19#include <utils/Log.h> 20 21#include "HTTPLiveSource.h" 22 23#include "ATSParser.h" 24#include "AnotherPacketSource.h" 25#include "LiveDataSource.h" 26#include "LiveSession.h" 27 28#include <media/stagefright/foundation/ABuffer.h> 29#include <media/stagefright/foundation/ADebug.h> 30#include <media/stagefright/foundation/AMessage.h> 31#include <media/stagefright/MediaErrors.h> 32#include <media/stagefright/MetaData.h> 33 34namespace android { 35 36NuPlayer::HTTPLiveSource::HTTPLiveSource( 37 const char *url, 38 const KeyedVector<String8, String8> *headers, 39 bool uidValid, uid_t uid) 40 : mURL(url), 41 mUIDValid(uidValid), 42 mUID(uid), 43 mFlags(0), 44 mEOS(false), 45 mOffset(0) { 46 if (headers) { 47 mExtraHeaders = *headers; 48 49 ssize_t index = 50 mExtraHeaders.indexOfKey(String8("x-hide-urls-from-log")); 51 52 if (index >= 0) { 53 mFlags |= kFlagIncognito; 54 55 mExtraHeaders.removeItemsAt(index); 56 } 57 } 58} 59 60NuPlayer::HTTPLiveSource::~HTTPLiveSource() { 61 if (mLiveSession != NULL) { 62 mLiveSession->disconnect(); 63 mLiveLooper->stop(); 64 } 65} 66 67void NuPlayer::HTTPLiveSource::start() { 68 mLiveLooper = new ALooper; 69 mLiveLooper->setName("http live"); 70 mLiveLooper->start(); 71 72 mLiveSession = new LiveSession( 73 (mFlags & kFlagIncognito) ? LiveSession::kFlagIncognito : 0, 74 mUIDValid, mUID); 75 76 mLiveLooper->registerHandler(mLiveSession); 77 78 mLiveSession->connect( 79 mURL.c_str(), mExtraHeaders.isEmpty() ? NULL : &mExtraHeaders); 80 81 mTSParser = new ATSParser; 82} 83 84sp<MetaData> NuPlayer::HTTPLiveSource::getFormat(bool audio) { 85 ATSParser::SourceType type = 86 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 87 88 sp<AnotherPacketSource> source = 89 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 90 91 if (source == NULL) { 92 return NULL; 93 } 94 95 return source->getFormat(); 96} 97 98bool NuPlayer::HTTPLiveSource::feedMoreTSData() { 99 if (mEOS) { 100 return false; 101 } 102 103 sp<LiveDataSource> source = 104 static_cast<LiveDataSource *>(mLiveSession->getDataSource().get()); 105 106 for (int32_t i = 0; i < 50; ++i) { 107 char buffer[188]; 108 ssize_t n = source->readAtNonBlocking(mOffset, buffer, sizeof(buffer)); 109 110 if (n == -EWOULDBLOCK) { 111 break; 112 } else if (n < 0) { 113 LOGI("input data EOS reached."); 114 mTSParser->signalEOS(n); 115 mEOS = true; 116 break; 117 } else { 118 if (buffer[0] == 0x00) { 119 // XXX legacy 120 sp<AMessage> extra; 121 mTSParser->signalDiscontinuity( 122 buffer[1] == 0x00 123 ? ATSParser::DISCONTINUITY_SEEK 124 : ATSParser::DISCONTINUITY_FORMATCHANGE, 125 extra); 126 } else { 127 status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer)); 128 129 if (err != OK) { 130 LOGE("TS Parser returned error %d", err); 131 mTSParser->signalEOS(err); 132 mEOS = true; 133 break; 134 } 135 } 136 137 mOffset += n; 138 } 139 } 140 141 return true; 142} 143 144status_t NuPlayer::HTTPLiveSource::dequeueAccessUnit( 145 bool audio, sp<ABuffer> *accessUnit) { 146 ATSParser::SourceType type = 147 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 148 149 sp<AnotherPacketSource> source = 150 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 151 152 if (source == NULL) { 153 return -EWOULDBLOCK; 154 } 155 156 status_t finalResult; 157 if (!source->hasBufferAvailable(&finalResult)) { 158 return finalResult == OK ? -EWOULDBLOCK : finalResult; 159 } 160 161 return source->dequeueAccessUnit(accessUnit); 162} 163 164status_t NuPlayer::HTTPLiveSource::getDuration(int64_t *durationUs) { 165 return mLiveSession->getDuration(durationUs); 166} 167 168status_t NuPlayer::HTTPLiveSource::seekTo(int64_t seekTimeUs) { 169 // We need to make sure we're not seeking until we have seen the very first 170 // PTS timestamp in the whole stream (from the beginning of the stream). 171 while (!mTSParser->PTSTimeDeltaEstablished() && feedMoreTSData()) { 172 usleep(100000); 173 } 174 175 mLiveSession->seekTo(seekTimeUs); 176 177 return OK; 178} 179 180bool NuPlayer::HTTPLiveSource::isSeekable() { 181 return mLiveSession->isSeekable(); 182} 183 184} // namespace android 185 186