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Camera: implement external camera dumpState/close

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Also switch to v4l2 timestamp is it's MONOTONIC

Test: Cts CameraDeviceTest
Bug: 72261676
Change-Id: Iec82c254dcf16a56952ff8910d13c92782d48090
This commit is contained in:
Yin-Chia Yeh
2018-02-14 12:47:16 -08:00
parent 190e5601d6
commit 4a3393cd8a
3 changed files with 176 additions and 37 deletions
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200
camera/device/3.4/default/ExternalCameraDeviceSession.cpp
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@@ -46,6 +46,21 @@ const int kBadFramesAfterStreamOn = 1; // drop x frames after streamOn to get ri
// bad frames. TODO: develop a better bad frame detection
// method
bool tryLock(Mutex& mutex)
{
static const int kDumpLockRetries = 50;
static const int kDumpLockSleep = 60000;
bool locked = false;
for (int i = 0; i < kDumpLockRetries; ++i) {
if (mutex.tryLock() == NO_ERROR) {
locked = true;
break;
}
usleep(kDumpLockSleep);
}
return locked;
}
} // Anonymous namespace
// Static instances
@@ -59,12 +74,14 @@ ExternalCameraDeviceSession::ExternalCameraDeviceSession(
const std::vector<SupportedV4L2Format>& sortedFormats,
const CroppingType& croppingType,
const common::V1_0::helper::CameraMetadata& chars,
const std::string& cameraId,
unique_fd v4l2Fd) :
mCallback(callback),
mCfg(cfg),
mCameraCharacteristics(chars),
mSupportedFormats(sortedFormats),
mCroppingType(croppingType),
mCameraId(cameraId),
mV4l2Fd(std::move(v4l2Fd)),
mOutputThread(new OutputThread(this, mCroppingType)),
mMaxThumbResolution(getMaxThumbResolution()),
@@ -119,8 +136,79 @@ ExternalCameraDeviceSession::~ExternalCameraDeviceSession() {
}
}
void ExternalCameraDeviceSession::dumpState(const native_handle_t*) {
// TODO: b/72261676 dump more runtime information
void ExternalCameraDeviceSession::dumpState(const native_handle_t* handle) {
if (handle->numFds != 1 || handle->numInts != 0) {
ALOGE("%s: handle must contain 1 FD and 0 integers! Got %d FDs and %d ints",
__FUNCTION__, handle->numFds, handle->numInts);
return;
}
int fd = handle->data[0];
bool intfLocked = tryLock(mInterfaceLock);
if (!intfLocked) {
dprintf(fd, "!! ExternalCameraDeviceSession interface may be deadlocked !!\n");
}
if (isClosed()) {
dprintf(fd, "External camera %s is closed\n", mCameraId.c_str());
return;
}
bool streaming = false;
size_t v4L2BufferCount = 0;
SupportedV4L2Format streamingFmt;
std::unordered_set<uint32_t> inflightFrames;
{
Mutex::Autolock _l(mLock);
bool sessionLocked = tryLock(mLock);
if (!sessionLocked) {
dprintf(fd, "!! ExternalCameraDeviceSession mLock may be deadlocked !!\n");
}
streaming = mV4l2Streaming;
streamingFmt = mV4l2StreamingFmt;
v4L2BufferCount = mV4L2BufferCount;
inflightFrames = mInflightFrames;
if (sessionLocked) {
mLock.unlock();
}
}
dprintf(fd, "External camera %s V4L2 FD %d, cropping type %s, %s\n",
mCameraId.c_str(), mV4l2Fd.get(),
(mCroppingType == VERTICAL) ? "vertical" : "horizontal",
streaming ? "streaming" : "not streaming");
if (streaming) {
// TODO: dump fps later
dprintf(fd, "Current V4L2 format %c%c%c%c %dx%d\n",
streamingFmt.fourcc & 0xFF,
(streamingFmt.fourcc >> 8) & 0xFF,
(streamingFmt.fourcc >> 16) & 0xFF,
(streamingFmt.fourcc >> 24) & 0xFF,
streamingFmt.width, streamingFmt.height);
size_t numDequeuedV4l2Buffers = 0;
{
std::lock_guard<std::mutex> lk(mV4l2BufferLock);
numDequeuedV4l2Buffers = mNumDequeuedV4l2Buffers;
}
dprintf(fd, "V4L2 buffer queue size %zu, dequeued %zu\n",
v4L2BufferCount, numDequeuedV4l2Buffers);
}
dprintf(fd, "In-flight frames (not sorted):");
for (const auto& frameNumber : inflightFrames) {
dprintf(fd, "%d, ", frameNumber);
}
dprintf(fd, "\n");
mOutputThread->dump(fd);
dprintf(fd, "\n");
if (intfLocked) {
mInterfaceLock.unlock();
}
return;
}
Return<void> ExternalCameraDeviceSession::constructDefaultRequestSettings(
@@ -292,21 +380,20 @@ Return<Status> ExternalCameraDeviceSession::flush() {
Return<void> ExternalCameraDeviceSession::close() {
Mutex::Autolock _il(mInterfaceLock);
Mutex::Autolock _l(mLock);
if (!mClosed) {
// TODO: b/72261676 Cleanup inflight buffers/V4L2 buffer queue
bool closed = isClosed();
if (!closed) {
mOutputThread->flush();
mOutputThread->requestExit();
mOutputThread->join();
Mutex::Autolock _l(mLock);
// free all buffers
for(auto pair : mStreamMap) {
cleanupBuffersLocked(/*Stream ID*/pair.first);
}
v4l2StreamOffLocked();
ALOGV("%s: closing V4L2 camera FD %d", __FUNCTION__, mV4l2Fd.get());
mV4l2Fd.reset();
mOutputThread->requestExit(); // TODO: join?
// free all imported buffers
for(auto& pair : mCirculatingBuffers) {
CirculatingBuffers& buffers = pair.second;
for (auto& p2 : buffers) {
sHandleImporter.freeBuffer(p2.second);
}
}
mClosed = true;
}
return Void();
@@ -442,15 +529,13 @@ Status ExternalCameraDeviceSession::processOneCaptureRequest(const CaptureReques
// TODO: program fps range per capture request here
// or limit the set of availableFpsRange
sp<V4L2Frame> frameIn = dequeueV4l2FrameLocked();
nsecs_t shutterTs = 0;
sp<V4L2Frame> frameIn = dequeueV4l2FrameLocked(&shutterTs);
if ( frameIn == nullptr) {
ALOGE("%s: V4L2 deque frame failed!", __FUNCTION__);
return Status::INTERNAL_ERROR;
}
// TODO: This can probably be replaced by use v4lbuffer timestamp
// if the device supports it
nsecs_t shutterTs = systemTime(SYSTEM_TIME_MONOTONIC);
// TODO: reduce object copy in this path
HalRequest halReq = {
@@ -1726,7 +1811,7 @@ void ExternalCameraDeviceSession::OutputThread::flush() {
std::list<HalRequest> reqs = mRequestList;
mRequestList.clear();
if (mProcessingRequest) {
std::chrono::seconds timeout = std::chrono::seconds(kReqWaitTimeoutSec);
std::chrono::seconds timeout = std::chrono::seconds(kFlushWaitTimeoutSec);
auto st = mRequestDoneCond.wait_for(lk, timeout);
if (st == std::cv_status::timeout) {
ALOGE("%s: wait for inflight request finish timeout!", __FUNCTION__);
@@ -1746,26 +1831,49 @@ void ExternalCameraDeviceSession::OutputThread::waitForNextRequest(HalRequest* o
}
std::unique_lock<std::mutex> lk(mRequestListLock);
int waitTimes = 0;
while (mRequestList.empty()) {
std::chrono::seconds timeout = std::chrono::seconds(kReqWaitTimeoutSec);
if (exitPending()) {
return;
}
std::chrono::milliseconds timeout = std::chrono::milliseconds(kReqWaitTimeoutMs);
auto st = mRequestCond.wait_for(lk, timeout);
if (st == std::cv_status::timeout) {
// no new request, return
return;
waitTimes++;
if (waitTimes == kReqWaitTimesMax) {
// no new request, return
return;
}
}
}
*out = mRequestList.front();
mRequestList.pop_front();
mProcessingRequest = true;
mProcessingFrameNumer = out->frameNumber;
}
void ExternalCameraDeviceSession::OutputThread::signalRequestDone() {
std::unique_lock<std::mutex> lk(mRequestListLock);
mProcessingRequest = false;
mProcessingFrameNumer = 0;
lk.unlock();
mRequestDoneCond.notify_one();
}
void ExternalCameraDeviceSession::OutputThread::dump(int fd) {
std::lock_guard<std::mutex> lk(mRequestListLock);
if (mProcessingRequest) {
dprintf(fd, "OutputThread processing frame %d\n", mProcessingFrameNumer);
} else {
dprintf(fd, "OutputThread not processing any frames\n");
}
dprintf(fd, "OutputThread request list contains frame: ");
for (const auto& req : mRequestList) {
dprintf(fd, "%d, ", req.frameNumber);
}
dprintf(fd, "\n");
}
void ExternalCameraDeviceSession::cleanupBuffersLocked(int id) {
for (auto& pair : mCirculatingBuffers.at(id)) {
sHandleImporter.freeBuffer(pair.second);
@@ -2027,15 +2135,25 @@ int ExternalCameraDeviceSession::configureV4l2StreamLocked(const SupportedV4L2Fo
return OK;
}
sp<V4L2Frame> ExternalCameraDeviceSession::dequeueV4l2FrameLocked() {
sp<V4L2Frame> ExternalCameraDeviceSession::dequeueV4l2FrameLocked(/*out*/nsecs_t* shutterTs) {
sp<V4L2Frame> ret = nullptr;
if (shutterTs == nullptr) {
ALOGE("%s: shutterTs must not be null!", __FUNCTION__);
return ret;
}
{
std::unique_lock<std::mutex> lk(mV4l2BufferLock);
if (mNumDequeuedV4l2Buffers == mV4L2BufferCount) {
std::chrono::seconds timeout = std::chrono::seconds(kBufferWaitTimeoutSec);
mLock.unlock();
auto st = mV4L2BufferReturned.wait_for(lk, timeout);
// Here we introduce a case where mV4l2BufferLock is acquired before mLock, while
// the normal lock acquisition order is reversed, but this is fine because in most of
// cases we are protected by mInterfaceLock. The only thread that can compete these
// locks are the OutputThread, where we do need to make sure we don't acquire mLock then
// mV4l2BufferLock
mLock.lock();
if (st == std::cv_status::timeout) {
ALOGE("%s: wait for V4L2 buffer return timeout!", __FUNCTION__);
@@ -2062,6 +2180,15 @@ sp<V4L2Frame> ExternalCameraDeviceSession::dequeueV4l2FrameLocked() {
// TODO: try to dequeue again
}
if (buffer.flags & V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC) {
// Ideally we should also check for V4L2_BUF_FLAG_TSTAMP_SRC_SOE, but
// even V4L2_BUF_FLAG_TSTAMP_SRC_EOF is better than capture a timestamp now
*shutterTs = static_cast<nsecs_t>(buffer.timestamp.tv_sec)*1000000000LL +
buffer.timestamp.tv_usec * 1000LL;
} else {
*shutterTs = systemTime(SYSTEM_TIME_MONOTONIC);
}
{
std::lock_guard<std::mutex> lk(mV4l2BufferLock);
mNumDequeuedV4l2Buffers++;
@@ -2072,15 +2199,20 @@ sp<V4L2Frame> ExternalCameraDeviceSession::dequeueV4l2FrameLocked() {
}
void ExternalCameraDeviceSession::enqueueV4l2Frame(const sp<V4L2Frame>& frame) {
Mutex::Autolock _l(mLock);
frame->unmap();
v4l2_buffer buffer{};
buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buffer.memory = V4L2_MEMORY_MMAP;
buffer.index = frame->mBufferIndex;
if (TEMP_FAILURE_RETRY(ioctl(mV4l2Fd.get(), VIDIOC_QBUF, &buffer)) < 0) {
ALOGE("%s: QBUF index %d fails: %s", __FUNCTION__, frame->mBufferIndex, strerror(errno));
return;
{
// Release mLock before acquiring mV4l2BufferLock to avoid potential
// deadlock
Mutex::Autolock _l(mLock);
frame->unmap();
v4l2_buffer buffer{};
buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buffer.memory = V4L2_MEMORY_MMAP;
buffer.index = frame->mBufferIndex;
if (TEMP_FAILURE_RETRY(ioctl(mV4l2Fd.get(), VIDIOC_QBUF, &buffer)) < 0) {
ALOGE("%s: QBUF index %d fails: %s", __FUNCTION__,
frame->mBufferIndex, strerror(errno));
return;
}
}
{