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 "StreamingSource" 19 #include <utils/Log.h> 20 21 #include "StreamingSource.h" 22 23 #include "ATSParser.h" 24 #include "AnotherPacketSource.h" 25 #include "NuPlayerStreamListener.h" 26 27 #include <media/stagefright/foundation/ABuffer.h> 28 #include <media/stagefright/foundation/ADebug.h> 29 #include <media/stagefright/foundation/AMessage.h> 30 #include <media/stagefright/MediaSource.h> 31 #include <media/stagefright/MetaData.h> 32 33 namespace android { 34 35 NuPlayer::StreamingSource::StreamingSource( 36 const sp<AMessage> ¬ify, 37 const sp<IStreamSource> &source) 38 : Source(notify), 39 mSource(source), 40 mFinalResult(OK) { 41 } 42 43 NuPlayer::StreamingSource::~StreamingSource() { 44 } 45 46 void NuPlayer::StreamingSource::prepareAsync() { 47 notifyVideoSizeChanged(0, 0); 48 notifyFlagsChanged(0); 49 notifyPrepared(); 50 } 51 52 void NuPlayer::StreamingSource::start() { 53 mStreamListener = new NuPlayerStreamListener(mSource, 0); 54 55 uint32_t sourceFlags = mSource->flags(); 56 57 uint32_t parserFlags = ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE; 58 if (sourceFlags & IStreamSource::kFlagAlignedVideoData) { 59 parserFlags |= ATSParser::ALIGNED_VIDEO_DATA; 60 } 61 62 mTSParser = new ATSParser(parserFlags); 63 64 mStreamListener->start(); 65 } 66 67 status_t NuPlayer::StreamingSource::feedMoreTSData() { 68 if (mFinalResult != OK) { 69 return mFinalResult; 70 } 71 72 for (int32_t i = 0; i < 50; ++i) { 73 char buffer[188]; 74 sp<AMessage> extra; 75 ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra); 76 77 if (n == 0) { 78 ALOGI("input data EOS reached."); 79 mTSParser->signalEOS(ERROR_END_OF_STREAM); 80 mFinalResult = ERROR_END_OF_STREAM; 81 break; 82 } else if (n == INFO_DISCONTINUITY) { 83 int32_t type = ATSParser::DISCONTINUITY_SEEK; 84 85 int32_t mask; 86 if (extra != NULL 87 && extra->findInt32( 88 IStreamListener::kKeyDiscontinuityMask, &mask)) { 89 if (mask == 0) { 90 ALOGE("Client specified an illegal discontinuity type."); 91 return ERROR_UNSUPPORTED; 92 } 93 94 type = mask; 95 } 96 97 mTSParser->signalDiscontinuity( 98 (ATSParser::DiscontinuityType)type, extra); 99 } else if (n < 0) { 100 CHECK_EQ(n, -EWOULDBLOCK); 101 break; 102 } else { 103 if (buffer[0] == 0x00) { 104 // XXX legacy 105 106 if (extra == NULL) { 107 extra = new AMessage; 108 } 109 110 uint8_t type = buffer[1]; 111 112 if (type & 2) { 113 int64_t mediaTimeUs; 114 memcpy(&mediaTimeUs, &buffer[2], sizeof(mediaTimeUs)); 115 116 extra->setInt64(IStreamListener::kKeyMediaTimeUs, mediaTimeUs); 117 } 118 119 mTSParser->signalDiscontinuity( 120 ((type & 1) == 0) 121 ? ATSParser::DISCONTINUITY_SEEK 122 : ATSParser::DISCONTINUITY_FORMATCHANGE, 123 extra); 124 } else { 125 status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer)); 126 127 if (err != OK) { 128 ALOGE("TS Parser returned error %d", err); 129 130 mTSParser->signalEOS(err); 131 mFinalResult = err; 132 break; 133 } 134 } 135 } 136 } 137 138 return OK; 139 } 140 141 sp<MetaData> NuPlayer::StreamingSource::getFormatMeta(bool audio) { 142 ATSParser::SourceType type = 143 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 144 145 sp<AnotherPacketSource> source = 146 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 147 148 if (source == NULL) { 149 return NULL; 150 } 151 152 return source->getFormat(); 153 } 154 155 status_t NuPlayer::StreamingSource::dequeueAccessUnit( 156 bool audio, sp<ABuffer> *accessUnit) { 157 ATSParser::SourceType type = 158 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 159 160 sp<AnotherPacketSource> source = 161 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 162 163 if (source == NULL) { 164 return -EWOULDBLOCK; 165 } 166 167 status_t finalResult; 168 if (!source->hasBufferAvailable(&finalResult)) { 169 return finalResult == OK ? -EWOULDBLOCK : finalResult; 170 } 171 172 status_t err = source->dequeueAccessUnit(accessUnit); 173 174 #if !defined(LOG_NDEBUG) || LOG_NDEBUG == 0 175 if (err == OK) { 176 int64_t timeUs; 177 CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs)); 178 ALOGV("dequeueAccessUnit timeUs=%lld us", timeUs); 179 } 180 #endif 181 182 return err; 183 } 184 185 bool NuPlayer::StreamingSource::isRealTime() const { 186 return mSource->flags() & IStreamSource::kFlagIsRealTimeData; 187 } 188 189 } // namespace android 190 191