StreamingSource.cpp revision 386d609dc513e838c7e7c4c46c604493ccd560be
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(const sp<IStreamSource> &source) 36 : mSource(source), 37 mEOS(false) { 38} 39 40NuPlayer::StreamingSource::~StreamingSource() { 41} 42 43void NuPlayer::StreamingSource::start() { 44 mStreamListener = new NuPlayerStreamListener(mSource, 0); 45 mTSParser = new ATSParser; 46 47 mStreamListener->start(); 48} 49 50bool NuPlayer::StreamingSource::feedMoreTSData() { 51 if (mEOS) { 52 return false; 53 } 54 55 for (int32_t i = 0; i < 10; ++i) { 56 char buffer[188]; 57 sp<AMessage> extra; 58 ssize_t n = mStreamListener->read(buffer, sizeof(buffer), &extra); 59 60 if (n == 0) { 61 LOGI("input data EOS reached."); 62 mTSParser->signalEOS(ERROR_END_OF_STREAM); 63 mEOS = true; 64 break; 65 } else if (n == INFO_DISCONTINUITY) { 66 mTSParser->signalDiscontinuity( 67 ATSParser::DISCONTINUITY_SEEK, extra); 68 } else if (n < 0) { 69 CHECK_EQ(n, -EWOULDBLOCK); 70 break; 71 } else { 72 if (buffer[0] == 0x00) { 73 // XXX legacy 74 mTSParser->signalDiscontinuity( 75 buffer[1] == 0x00 76 ? ATSParser::DISCONTINUITY_SEEK 77 : ATSParser::DISCONTINUITY_FORMATCHANGE, 78 extra); 79 } else { 80 mTSParser->feedTSPacket(buffer, sizeof(buffer)); 81 } 82 } 83 } 84 85 return true; 86} 87 88sp<MetaData> NuPlayer::StreamingSource::getFormat(bool audio) { 89 ATSParser::SourceType type = 90 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 91 92 sp<AnotherPacketSource> source = 93 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 94 95 if (source == NULL) { 96 return NULL; 97 } 98 99 return source->getFormat(); 100} 101 102status_t NuPlayer::StreamingSource::dequeueAccessUnit( 103 bool audio, sp<ABuffer> *accessUnit) { 104 ATSParser::SourceType type = 105 audio ? ATSParser::AUDIO : ATSParser::VIDEO; 106 107 sp<AnotherPacketSource> source = 108 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 109 110 if (source == NULL) { 111 return -EWOULDBLOCK; 112 } 113 114 status_t finalResult; 115 if (!source->hasBufferAvailable(&finalResult)) { 116 return finalResult == OK ? -EWOULDBLOCK : finalResult; 117 } 118 119 return source->dequeueAccessUnit(accessUnit); 120} 121 122} // namespace android 123 124