StreamingSource.cpp revision ab05b4ccb8ea59079d7f773aa0e090029c479bad
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 33namespace android { 34 35NuPlayer::StreamingSource::StreamingSource( 36 const sp<AMessage> ¬ify, 37 const sp<IStreamSource> &source) 38 : Source(notify), 39 mSource(source), 40 mFinalResult(OK) { 41} 42 43NuPlayer::StreamingSource::~StreamingSource() { 44} 45 46void NuPlayer::StreamingSource::prepareAsync() { 47 notifyVideoSizeChanged(); 48 notifyFlagsChanged(0); 49 notifyPrepared(); 50} 51 52void 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 67status_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_TIME; 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_TIME 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 141sp<MetaData> NuPlayer::StreamingSource::getFormatMeta(bool audio) { 142 if (mTSParser == NULL) { 143 return NULL; 144 } 145 146 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 NULL; 154 } 155 156 return source->getFormat(); 157} 158 159status_t NuPlayer::StreamingSource::dequeueAccessUnit( 160 bool audio, sp<ABuffer> *accessUnit) { 161 ATSParser::SourceType type = 162 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 163 164 sp<AnotherPacketSource> source = 165 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 166 167 if (source == NULL) { 168 return -EWOULDBLOCK; 169 } 170 171 status_t finalResult; 172 if (!source->hasBufferAvailable(&finalResult)) { 173 return finalResult == OK ? -EWOULDBLOCK : finalResult; 174 } 175 176 status_t err = source->dequeueAccessUnit(accessUnit); 177 178#if !defined(LOG_NDEBUG) || LOG_NDEBUG == 0 179 if (err == OK) { 180 int64_t timeUs; 181 CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs)); 182 ALOGV("dequeueAccessUnit timeUs=%lld us", timeUs); 183 } 184#endif 185 186 return err; 187} 188 189bool NuPlayer::StreamingSource::isRealTime() const { 190 return mSource->flags() & IStreamSource::kFlagIsRealTimeData; 191} 192 193} // namespace android 194 195