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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "AMPEG4ElementaryAssembler.h"
#include "ARTPSource.h"
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/AMessage.h>
#include <media/stagefright/foundation/hexdump.h>
#include <stdint.h>
#define BE_VERBOSE 0
namespace android {
// static
AMPEG4ElementaryAssembler::AMPEG4ElementaryAssembler(const sp<AMessage> ¬ify)
: mNotifyMsg(notify),
mAccessUnitRTPTime(0),
mNextExpectedSeqNoValid(false),
mNextExpectedSeqNo(0),
mAccessUnitDamaged(false) {
}
AMPEG4ElementaryAssembler::~AMPEG4ElementaryAssembler() {
}
ARTPAssembler::AssemblyStatus AMPEG4ElementaryAssembler::addPacket(
const sp<ARTPSource> &source) {
List<sp<ABuffer> > *queue = source->queue();
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
if (mNextExpectedSeqNoValid) {
List<sp<ABuffer> >::iterator it = queue->begin();
while (it != queue->end()) {
if ((uint32_t)(*it)->int32Data() >= mNextExpectedSeqNo) {
break;
}
it = queue->erase(it);
}
if (queue->empty()) {
return NOT_ENOUGH_DATA;
}
}
sp<ABuffer> buffer = *queue->begin();
if (!mNextExpectedSeqNoValid) {
mNextExpectedSeqNoValid = true;
mNextExpectedSeqNo = (uint32_t)buffer->int32Data();
} else if ((uint32_t)buffer->int32Data() != mNextExpectedSeqNo) {
#if BE_VERBOSE
LOG(VERBOSE) << "Not the sequence number I expected";
#endif
return WRONG_SEQUENCE_NUMBER;
}
uint32_t rtpTime;
CHECK(buffer->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
if (mPackets.size() > 0 && rtpTime != mAccessUnitRTPTime) {
submitAccessUnit();
}
mAccessUnitRTPTime = rtpTime;
mPackets.push_back(buffer);
// hexdump(buffer->data(), buffer->size());
queue->erase(queue->begin());
++mNextExpectedSeqNo;
return OK;
}
void AMPEG4ElementaryAssembler::submitAccessUnit() {
CHECK(!mPackets.empty());
#if BE_VERBOSE
LOG(VERBOSE) << "Access unit complete (" << mPackets.size() << " nal units)";
#endif
size_t totalSize = 0;
for (List<sp<ABuffer> >::iterator it = mPackets.begin();
it != mPackets.end(); ++it) {
totalSize += (*it)->size();
}
sp<ABuffer> accessUnit = new ABuffer(totalSize);
size_t offset = 0;
for (List<sp<ABuffer> >::iterator it = mPackets.begin();
it != mPackets.end(); ++it) {
sp<ABuffer> nal = *it;
memcpy(accessUnit->data() + offset, nal->data(), nal->size());
offset += nal->size();
}
CopyTimes(accessUnit, *mPackets.begin());
#if 0
printf(mAccessUnitDamaged ? "X" : ".");
fflush(stdout);
#endif
if (mAccessUnitDamaged) {
accessUnit->meta()->setInt32("damaged", true);
}
mPackets.clear();
mAccessUnitDamaged = false;
sp<AMessage> msg = mNotifyMsg->dup();
msg->setObject("access-unit", accessUnit);
msg->post();
}
ARTPAssembler::AssemblyStatus AMPEG4ElementaryAssembler::assembleMore(
const sp<ARTPSource> &source) {
AssemblyStatus status = addPacket(source);
if (status == MALFORMED_PACKET) {
mAccessUnitDamaged = true;
}
return status;
}
void AMPEG4ElementaryAssembler::packetLost() {
CHECK(mNextExpectedSeqNoValid);
LOG(VERBOSE) << "packetLost (expected " << mNextExpectedSeqNo << ")";
++mNextExpectedSeqNo;
mAccessUnitDamaged = true;
}
void AMPEG4ElementaryAssembler::onByeReceived() {
sp<AMessage> msg = mNotifyMsg->dup();
msg->setInt32("eos", true);
msg->post();
}
} // namespace android
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