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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 "ARTPAssembler.h"
#include <media/stagefright/foundation/ABuffer.h>
#include <media/stagefright/foundation/ADebug.h>
#include <media/stagefright/foundation/ALooper.h>
#include <media/stagefright/foundation/AMessage.h>
#include <stdint.h>
namespace android {
ARTPAssembler::ARTPAssembler()
: mFirstFailureTimeUs(-1) {
}
void ARTPAssembler::onPacketReceived(const sp<ARTPSource> &source) {
AssemblyStatus status;
for (;;) {
status = assembleMore(source);
if (status == WRONG_SEQUENCE_NUMBER) {
if (mFirstFailureTimeUs >= 0) {
if (ALooper::GetNowUs() - mFirstFailureTimeUs > 10000ll) {
mFirstFailureTimeUs = -1;
// LOG(VERBOSE) << "waited too long for packet.";
packetLost();
continue;
}
} else {
mFirstFailureTimeUs = ALooper::GetNowUs();
}
break;
} else {
mFirstFailureTimeUs = -1;
if (status == NOT_ENOUGH_DATA) {
break;
}
}
}
}
// static
void ARTPAssembler::CopyTimes(const sp<ABuffer> &to, const sp<ABuffer> &from) {
uint32_t rtpTime;
CHECK(from->meta()->findInt32("rtp-time", (int32_t *)&rtpTime));
to->meta()->setInt32("rtp-time", rtpTime);
// Copy the seq number.
to->setInt32Data(from->int32Data());
}
// static
sp<ABuffer> ARTPAssembler::MakeADTSCompoundFromAACFrames(
unsigned profile,
unsigned samplingFreqIndex,
unsigned channelConfig,
const List<sp<ABuffer> > &frames) {
size_t totalSize = 0;
for (List<sp<ABuffer> >::const_iterator it = frames.begin();
it != frames.end(); ++it) {
// Each frame is prefixed by a 7 byte ADTS header
totalSize += (*it)->size() + 7;
}
sp<ABuffer> accessUnit = new ABuffer(totalSize);
size_t offset = 0;
for (List<sp<ABuffer> >::const_iterator it = frames.begin();
it != frames.end(); ++it) {
sp<ABuffer> nal = *it;
uint8_t *dst = accessUnit->data() + offset;
static const unsigned kADTSId = 0;
static const unsigned kADTSLayer = 0;
static const unsigned kADTSProtectionAbsent = 1;
unsigned frameLength = nal->size() + 7;
dst[0] = 0xff;
dst[1] =
0xf0 | (kADTSId << 3) | (kADTSLayer << 1) | kADTSProtectionAbsent;
dst[2] = (profile << 6)
| (samplingFreqIndex << 2)
| (channelConfig >> 2);
dst[3] = ((channelConfig & 3) << 6) | (frameLength >> 11);
dst[4] = (frameLength >> 3) & 0xff;
dst[5] = (frameLength & 7) << 5;
dst[6] = 0x00;
memcpy(dst + 7, nal->data(), nal->size());
offset += nal->size() + 7;
}
CopyTimes(accessUnit, *frames.begin());
return accessUnit;
}
// static
sp<ABuffer> ARTPAssembler::MakeCompoundFromPackets(
const List<sp<ABuffer> > &packets) {
size_t totalSize = 0;
for (List<sp<ABuffer> >::const_iterator it = packets.begin();
it != packets.end(); ++it) {
totalSize += (*it)->size();
}
sp<ABuffer> accessUnit = new ABuffer(totalSize);
size_t offset = 0;
for (List<sp<ABuffer> >::const_iterator it = packets.begin();
it != packets.end(); ++it) {
sp<ABuffer> nal = *it;
memcpy(accessUnit->data() + offset, nal->data(), nal->size());
offset += nal->size();
}
CopyTimes(accessUnit, *packets.begin());
return accessUnit;
}
} // namespace android
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