StreamingSource.cpp revision 5ab368af38fefacc4009e3ab1c1bbd00e62b3bcf
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::start() { 47 mStreamListener = new NuPlayerStreamListener(mSource, 0); 48 49 uint32_t sourceFlags = mSource->flags(); 50 51 uint32_t parserFlags = ATSParser::TS_TIMESTAMPS_ARE_ABSOLUTE; 52 if (sourceFlags & IStreamSource::kFlagAlignedVideoData) { 53 parserFlags |= ATSParser::ALIGNED_VIDEO_DATA; 54 } 55 56 mTSParser = new ATSParser(parserFlags); 57 58 mStreamListener->start(); 59} 60 61status_t NuPlayer::StreamingSource::feedMoreTSData() { 62 if (mFinalResult != OK) { 63 return mFinalResult; 64 } 65 66 for (int32_t i = 0; i < 50; ++i) { 67 char buffer[188]; 68 sp<AMessage> extra; 69 ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra); 70 71 if (n == 0) { 72 ALOGI("input data EOS reached."); 73 mTSParser->signalEOS(ERROR_END_OF_STREAM); 74 mFinalResult = ERROR_END_OF_STREAM; 75 break; 76 } else if (n == INFO_DISCONTINUITY) { 77 int32_t type = ATSParser::DISCONTINUITY_SEEK; 78 79 int32_t mask; 80 if (extra != NULL 81 && extra->findInt32( 82 IStreamListener::kKeyDiscontinuityMask, &mask)) { 83 if (mask == 0) { 84 ALOGE("Client specified an illegal discontinuity type."); 85 return ERROR_UNSUPPORTED; 86 } 87 88 type = mask; 89 } 90 91 mTSParser->signalDiscontinuity( 92 (ATSParser::DiscontinuityType)type, extra); 93 } else if (n < 0) { 94 CHECK_EQ(n, -EWOULDBLOCK); 95 break; 96 } else { 97 if (buffer[0] == 0x00) { 98 // XXX legacy 99 100 if (extra == NULL) { 101 extra = new AMessage; 102 } 103 104 uint8_t type = buffer[1]; 105 106 if (type & 2) { 107 int64_t mediaTimeUs; 108 memcpy(&mediaTimeUs, &buffer[2], sizeof(mediaTimeUs)); 109 110 extra->setInt64(IStreamListener::kKeyMediaTimeUs, mediaTimeUs); 111 } 112 113 mTSParser->signalDiscontinuity( 114 ((type & 1) == 0) 115 ? ATSParser::DISCONTINUITY_SEEK 116 : ATSParser::DISCONTINUITY_FORMATCHANGE, 117 extra); 118 } else { 119 status_t err = mTSParser->feedTSPacket(buffer, sizeof(buffer)); 120 121 if (err != OK) { 122 ALOGE("TS Parser returned error %d", err); 123 124 mTSParser->signalEOS(err); 125 mFinalResult = err; 126 break; 127 } 128 } 129 } 130 } 131 132 return OK; 133} 134 135sp<MetaData> NuPlayer::StreamingSource::getFormatMeta(bool audio) { 136 ATSParser::SourceType type = 137 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 138 139 sp<AnotherPacketSource> source = 140 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 141 142 if (source == NULL) { 143 return NULL; 144 } 145 146 return source->getFormat(); 147} 148 149status_t NuPlayer::StreamingSource::dequeueAccessUnit( 150 bool audio, sp<ABuffer> *accessUnit) { 151 ATSParser::SourceType type = 152 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 153 154 sp<AnotherPacketSource> source = 155 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 156 157 if (source == NULL) { 158 return -EWOULDBLOCK; 159 } 160 161 status_t finalResult; 162 if (!source->hasBufferAvailable(&finalResult)) { 163 return finalResult == OK ? -EWOULDBLOCK : finalResult; 164 } 165 166 status_t err = source->dequeueAccessUnit(accessUnit); 167 168#if !defined(LOG_NDEBUG) || LOG_NDEBUG == 0 169 if (err == OK) { 170 int64_t timeUs; 171 CHECK((*accessUnit)->meta()->findInt64("timeUs", &timeUs)); 172 ALOGV("dequeueAccessUnit timeUs=%lld us", timeUs); 173 } 174#endif 175 176 return err; 177} 178 179uint32_t NuPlayer::StreamingSource::flags() const { 180 return 0; 181} 182 183} // namespace android 184 185