StreamingSource.cpp revision 5bc087c573c70c84c6a39946457590b42d392a33
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 ssize_t n = mStreamListener->read(buffer, sizeof(buffer)); 58 59 if (n == 0) { 60 LOGI("input data EOS reached."); 61 mTSParser->signalEOS(ERROR_END_OF_STREAM); 62 mEOS = true; 63 break; 64 } else if (n == INFO_DISCONTINUITY) { 65 mTSParser->signalDiscontinuity(ATSParser::DISCONTINUITY_SEEK); 66 } else if (n < 0) { 67 CHECK_EQ(n, -EWOULDBLOCK); 68 break; 69 } else { 70 if (buffer[0] == 0x00) { 71 // XXX legacy 72 mTSParser->signalDiscontinuity( 73 buffer[1] == 0x00 74 ? ATSParser::DISCONTINUITY_SEEK 75 : ATSParser::DISCONTINUITY_FORMATCHANGE); 76 } else { 77 mTSParser->feedTSPacket(buffer, sizeof(buffer)); 78 } 79 } 80 } 81 82 return true; 83} 84 85sp<MetaData> NuPlayer::StreamingSource::getFormat(bool audio) { 86 ATSParser::SourceType type = 87 audio ? ATSParser::MPEG2ADTS_AUDIO : ATSParser::AVC_VIDEO; 88 89 sp<AnotherPacketSource> source = 90 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 91 92 if (source == NULL) { 93 return NULL; 94 } 95 96 return source->getFormat(); 97} 98 99status_t NuPlayer::StreamingSource::dequeueAccessUnit( 100 bool audio, sp<ABuffer> *accessUnit) { 101 ATSParser::SourceType type = 102 audio ? ATSParser::MPEG2ADTS_AUDIO : ATSParser::AVC_VIDEO; 103 104 sp<AnotherPacketSource> source = 105 static_cast<AnotherPacketSource *>(mTSParser->getSource(type).get()); 106 107 if (source == NULL) { 108 return -EWOULDBLOCK; 109 } 110 111 status_t finalResult; 112 if (!source->hasBufferAvailable(&finalResult)) { 113 return finalResult == OK ? -EWOULDBLOCK : finalResult; 114 } 115 116 return source->dequeueAccessUnit(accessUnit); 117} 118 119} // namespace android 120 121