Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 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 | #include "AH263Assembler.h" |
| 18 | |
| 19 | #include "ARTPSource.h" |
| 20 | |
| 21 | #include <media/stagefright/foundation/ABuffer.h> |
| 22 | #include <media/stagefright/foundation/ADebug.h> |
| 23 | #include <media/stagefright/foundation/AMessage.h> |
| 24 | #include <media/stagefright/foundation/hexdump.h> |
| 25 | #include <media/stagefright/Utils.h> |
| 26 | |
| 27 | namespace android { |
| 28 | |
| 29 | AH263Assembler::AH263Assembler(const sp<AMessage> ¬ify) |
| 30 | : mNotifyMsg(notify), |
| 31 | mAccessUnitRTPTime(0), |
| 32 | mNextExpectedSeqNoValid(false), |
| 33 | mNextExpectedSeqNo(0), |
| 34 | mAccessUnitDamaged(false) { |
| 35 | } |
| 36 | |
| 37 | AH263Assembler::~AH263Assembler() { |
| 38 | } |
| 39 | |
| 40 | ARTPAssembler::AssemblyStatus AH263Assembler::assembleMore( |
| 41 | const sp<ARTPSource> &source) { |
| 42 | AssemblyStatus status = addPacket(source); |
| 43 | if (status == MALFORMED_PACKET) { |
| 44 | mAccessUnitDamaged = true; |
| 45 | } |
| 46 | return status; |
| 47 | } |
| 48 | |
| 49 | ARTPAssembler::AssemblyStatus AH263Assembler::addPacket( |
| 50 | const sp<ARTPSource> &source) { |
| 51 | List<sp<ABuffer> > *queue = source->queue(); |
| 52 | |
| 53 | if (queue->empty()) { |
| 54 | return NOT_ENOUGH_DATA; |
| 55 | } |
| 56 | |
| 57 | if (mNextExpectedSeqNoValid) { |
| 58 | List<sp<ABuffer> >::iterator it = queue->begin(); |
| 59 | while (it != queue->end()) { |
| 60 | if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) { |
| 61 | break; |
| 62 | } |
| 63 | |
| 64 | it = queue->erase(it); |
| 65 | } |
| 66 | |
| 67 | if (queue->empty()) { |
| 68 | return NOT_ENOUGH_DATA; |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | sp<ABuffer> buffer = *queue->begin(); |
| 73 | |
| 74 | if (!mNextExpectedSeqNoValid) { |
| 75 | mNextExpectedSeqNoValid = true; |
| 76 | mNextExpectedSeqNo = (uint32_t)buffer->int32Data(); |
| 77 | } else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) { |
| 78 | #if VERBOSE |
| 79 | LOG(VERBOSE) << "Not the sequence number I expected"; |
| 80 | #endif |
| 81 | |
| 82 | return WRONG_SEQUENCE_NUMBER; |
| 83 | } |
| 84 | |
| 85 | uint32_t rtpTime; |
| 86 | CHECK(buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime)); |
| 87 | |
| 88 | if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) { |
| 89 | submitAccessUnit(); |
| 90 | } |
| 91 | mAccessUnitRTPTime = rtpTime; |
| 92 | |
| 93 | // hexdump(buffer->data(), buffer->size()); |
| 94 | |
| 95 | if (buffer->size() < 2) { |
| 96 | queue->erase(queue->begin()); |
| 97 | ++mNextExpectedSeqNo; |
| 98 | |
| 99 | return MALFORMED_PACKET; |
| 100 | } |
| 101 | |
| 102 | unsigned payloadHeader = U16_AT(buffer->data()); |
| 103 | CHECK_EQ(payloadHeader >> 11, 0u); // RR=0 |
| 104 | unsigned P = (payloadHeader >> 10) & 1; |
| 105 | CHECK_EQ((payloadHeader >> 9) & 1, 0u); // V=0 |
| 106 | CHECK_EQ((payloadHeader >> 3) & 0x3f, 0u); // PLEN=0 |
| 107 | CHECK_EQ(payloadHeader & 7, 0u); // PEBIT=0 |
| 108 | |
| 109 | if (P) { |
| 110 | buffer->data()[0] = 0x00; |
| 111 | buffer->data()[1] = 0x00; |
| 112 | } else { |
Andreas Huber | 00237b7 | 2010-08-12 10:58:24 -0700 | [diff] [blame] | 113 | buffer->setRange(buffer->offset() + 2, buffer->size() - 2); |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | mPackets.push_back(buffer); |
| 117 | |
| 118 | queue->erase(queue->begin()); |
| 119 | ++mNextExpectedSeqNo; |
| 120 | |
| 121 | return OK; |
| 122 | } |
| 123 | |
| 124 | void AH263Assembler::submitAccessUnit() { |
| 125 | CHECK(!mPackets.empty()); |
| 126 | |
| 127 | #if VERBOSE |
| 128 | LOG(VERBOSE) << "Access unit complete (" << mPackets.size() << " packets)"; |
| 129 | #endif |
| 130 | |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 131 | size_t totalSize = 0; |
| 132 | List<sp<ABuffer> >::iterator it = mPackets.begin(); |
| 133 | while (it != mPackets.end()) { |
| 134 | const sp<ABuffer> &unit = *it; |
| 135 | |
| 136 | totalSize += unit->size(); |
| 137 | ++it; |
| 138 | } |
| 139 | |
| 140 | sp<ABuffer> accessUnit = new ABuffer(totalSize); |
| 141 | size_t offset = 0; |
| 142 | it = mPackets.begin(); |
| 143 | while (it != mPackets.end()) { |
| 144 | const sp<ABuffer> &unit = *it; |
| 145 | |
| 146 | memcpy((uint8_t *)accessUnit->data() + offset, |
| 147 | unit->data(), unit->size()); |
| 148 | |
| 149 | offset += unit->size(); |
| 150 | |
| 151 | ++it; |
| 152 | } |
| 153 | |
Andreas Huber | eeb97d9 | 2010-08-27 13:29:08 -0700 | [diff] [blame] | 154 | CopyTimes(accessUnit, *mPackets.begin()); |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 155 | |
| 156 | #if 0 |
| 157 | printf(mAccessUnitDamaged ? "X" : "."); |
| 158 | fflush(stdout); |
| 159 | #endif |
| 160 | |
| 161 | if (mAccessUnitDamaged) { |
| 162 | accessUnit->meta()->setInt32("damaged", true); |
| 163 | } |
| 164 | |
| 165 | mPackets.clear(); |
| 166 | mAccessUnitDamaged = false; |
| 167 | |
| 168 | sp<AMessage> msg = mNotifyMsg->dup(); |
Andreas Huber | 5c85039 | 2012-02-21 14:38:23 -0800 | [diff] [blame] | 169 | msg->setBuffer("access-unit", accessUnit); |
Andreas Huber | 57648e4 | 2010-08-04 10:14:30 -0700 | [diff] [blame] | 170 | msg->post(); |
| 171 | } |
| 172 | |
| 173 | void AH263Assembler::packetLost() { |
| 174 | CHECK(mNextExpectedSeqNoValid); |
| 175 | ++mNextExpectedSeqNo; |
| 176 | |
| 177 | mAccessUnitDamaged = true; |
| 178 | } |
| 179 | |
| 180 | void AH263Assembler::onByeReceived() { |
| 181 | sp<AMessage> msg = mNotifyMsg->dup(); |
| 182 | msg->setInt32("eos", true); |
| 183 | msg->post(); |
| 184 | } |
| 185 | |
| 186 | } // namespace android |
| 187 | |