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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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "ARTPSession"
#include <utils/Log.h>
#include "ARTPSession.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 <ctype.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include "APacketSource.h"
#include "ARTPConnection.h"
#include "ASessionDescription.h"
namespace android {
ARTPSession::ARTPSession()
: mInitCheck(NO_INIT) {
}
status_t ARTPSession::setup(const sp<ASessionDescription> &desc) {
CHECK_EQ(mInitCheck, (status_t)NO_INIT);
mDesc = desc;
mRTPConn = new ARTPConnection(ARTPConnection::kRegularlyRequestFIR);
looper()->registerHandler(mRTPConn);
for (size_t i = 1; i < mDesc->countTracks(); ++i) {
AString connection;
if (!mDesc->findAttribute(i, "c=", &connection)) {
// No per-stream connection information, try global fallback.
if (!mDesc->findAttribute(0, "c=", &connection)) {
LOGE("Unable to find connection attribute.");
return mInitCheck;
}
}
if (!(connection == "IN IP4 127.0.0.1")) {
LOGE("We only support localhost connections for now.");
return mInitCheck;
}
unsigned port;
if (!validateMediaFormat(i, &port) || (port & 1) != 0) {
LOGE("Invalid media format.");
return mInitCheck;
}
sp<APacketSource> source = new APacketSource(mDesc, i);
if (source->initCheck() != OK) {
LOGE("Unsupported format.");
return mInitCheck;
}
int rtpSocket = MakeUDPSocket(port);
int rtcpSocket = MakeUDPSocket(port + 1);
mTracks.push(TrackInfo());
TrackInfo *info = &mTracks.editItemAt(mTracks.size() - 1);
info->mRTPSocket = rtpSocket;
info->mRTCPSocket = rtcpSocket;
sp<AMessage> notify = new AMessage(kWhatAccessUnitComplete, id());
notify->setSize("track-index", mTracks.size() - 1);
mRTPConn->addStream(
rtpSocket, rtcpSocket, mDesc, i, notify, false /* injected */);
info->mPacketSource = source;
}
mInitCheck = OK;
return OK;
}
// static
int ARTPSession::MakeUDPSocket(unsigned port) {
int s = socket(AF_INET, SOCK_DGRAM, 0);
CHECK_GE(s, 0);
struct sockaddr_in addr;
memset(addr.sin_zero, 0, sizeof(addr.sin_zero));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = INADDR_ANY;
addr.sin_port = htons(port);
CHECK_EQ(0, bind(s, (const struct sockaddr *)&addr, sizeof(addr)));
return s;
}
ARTPSession::~ARTPSession() {
for (size_t i = 0; i < mTracks.size(); ++i) {
TrackInfo *info = &mTracks.editItemAt(i);
info->mPacketSource->signalEOS(UNKNOWN_ERROR);
close(info->mRTPSocket);
close(info->mRTCPSocket);
}
}
void ARTPSession::onMessageReceived(const sp<AMessage> &msg) {
switch (msg->what()) {
case kWhatAccessUnitComplete:
{
int32_t firstRTCP;
if (msg->findInt32("first-rtcp", &firstRTCP)) {
// There won't be an access unit here, it's just a notification
// that the data communication worked since we got the first
// rtcp packet.
break;
}
size_t trackIndex;
CHECK(msg->findSize("track-index", &trackIndex));
int32_t eos;
if (msg->findInt32("eos", &eos) && eos) {
TrackInfo *info = &mTracks.editItemAt(trackIndex);
info->mPacketSource->signalEOS(ERROR_END_OF_STREAM);
break;
}
sp<RefBase> obj;
CHECK(msg->findObject("access-unit", &obj));
sp<ABuffer> accessUnit = static_cast<ABuffer *>(obj.get());
uint64_t ntpTime;
CHECK(accessUnit->meta()->findInt64(
"ntp-time", (int64_t *)&ntpTime));
#if 0
#if 0
printf("access unit complete size=%d\tntp-time=0x%016llx\n",
accessUnit->size(), ntpTime);
#else
ALOGI("access unit complete, size=%d, ntp-time=%llu",
accessUnit->size(), ntpTime);
hexdump(accessUnit->data(), accessUnit->size());
#endif
#endif
#if 0
CHECK_GE(accessUnit->size(), 5u);
CHECK(!memcmp("\x00\x00\x00\x01", accessUnit->data(), 4));
unsigned x = accessUnit->data()[4];
ALOGI("access unit complete: nalType=0x%02x, nalRefIdc=0x%02x",
x & 0x1f, (x & 0x60) >> 5);
#endif
accessUnit->meta()->setInt64("ntp-time", ntpTime);
accessUnit->meta()->setInt64("timeUs", 0);
#if 0
int32_t damaged;
if (accessUnit->meta()->findInt32("damaged", &damaged)
&& damaged != 0) {
ALOGI("ignoring damaged AU");
} else
#endif
{
TrackInfo *info = &mTracks.editItemAt(trackIndex);
info->mPacketSource->queueAccessUnit(accessUnit);
}
break;
}
default:
TRESPASS();
break;
}
}
bool ARTPSession::validateMediaFormat(size_t index, unsigned *port) const {
AString format;
mDesc->getFormat(index, &format);
ssize_t i = format.find(" ");
if (i < 0) {
return false;
}
++i;
size_t j = i;
while (isdigit(format.c_str()[j])) {
++j;
}
if (format.c_str()[j] != ' ') {
return false;
}
AString portString(format, i, j - i);
char *end;
unsigned long x = strtoul(portString.c_str(), &end, 10);
if (end == portString.c_str() || *end != '\0') {
return false;
}
if (x == 0 || x > 65535) {
return false;
}
*port = x;
return true;
}
size_t ARTPSession::countTracks() {
return mTracks.size();
}
sp<MediaSource> ARTPSession::trackAt(size_t index) {
CHECK_LT(index, mTracks.size());
return mTracks.editItemAt(index).mPacketSource;
}
} // namespace android
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