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libcamera: Switch to FrameBuffer interface

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Switch to the FrameBuffer interface where all buffers are treated as
external buffers and are allocated outside the camera. Applications
allocating buffers using libcamera are switched to use the
FrameBufferAllocator helper.

Follow-up changes to this one will finalize the transition to the new
FrameBuffer interface by removing code that is left unused after this
change.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Niklas Söderlund 2019-11-22 16:22:56 +01:00
parent eb4030f6c0
commit 9217f274f6
23 changed files with 267 additions and 368 deletions
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60
src/v4l2/v4l2_camera.cpp
View file

@ -16,24 +16,15 @@ using namespace libcamera;
LOG_DECLARE_CATEGORY(V4L2Compat);
V4L2FrameMetadata::V4L2FrameMetadata(Buffer *buffer)
: index_(buffer->index()),
bytesused_(buffer->metadata().planes[0].bytesused),
timestamp_(buffer->metadata().timestamp),
sequence_(buffer->metadata().sequence),
status_(buffer->metadata().status)
{
}
V4L2Camera::V4L2Camera(std::shared_ptr<Camera> camera)
: camera_(camera), isRunning_(false)
: camera_(camera), isRunning_(false), bufferAllocator_(nullptr)
{
camera_->requestCompleted.connect(this, &V4L2Camera::requestComplete);
}
V4L2Camera::~V4L2Camera()
{
camera_->release();
close();
}
int V4L2Camera::open()
@ -50,11 +41,16 @@ int V4L2Camera::open()
return -EINVAL;
}
bufferAllocator_ = FrameBufferAllocator::create(camera_);
return 0;
}
void V4L2Camera::close()
{
delete bufferAllocator_;
bufferAllocator_ = nullptr;
camera_->release();
}
@ -63,12 +59,12 @@ void V4L2Camera::getStreamConfig(StreamConfiguration *streamConfig)
*streamConfig = config_->at(0);
}
std::vector<V4L2FrameMetadata> V4L2Camera::completedBuffers()
std::vector<V4L2Camera::Buffer> V4L2Camera::completedBuffers()
{
std::vector<V4L2FrameMetadata> v;
std::vector<Buffer> v;
bufferLock_.lock();
for (std::unique_ptr<V4L2FrameMetadata> &metadata : completedBuffers_)
for (std::unique_ptr<Buffer> &metadata : completedBuffers_)
v.push_back(*metadata.get());
completedBuffers_.clear();
bufferLock_.unlock();
@ -83,9 +79,9 @@ void V4L2Camera::requestComplete(Request *request)
/* We only have one stream at the moment. */
bufferLock_.lock();
Buffer *buffer = request->buffers().begin()->second;
std::unique_ptr<V4L2FrameMetadata> metadata =
utils::make_unique<V4L2FrameMetadata>(buffer);
FrameBuffer *buffer = request->buffers().begin()->second;
std::unique_ptr<Buffer> metadata =
utils::make_unique<Buffer>(request->cookie(), buffer->metadata());
completedBuffers_.push_back(std::move(metadata));
bufferLock_.unlock();
@ -126,18 +122,31 @@ int V4L2Camera::configure(StreamConfiguration *streamConfigOut,
int V4L2Camera::allocBuffers(unsigned int count)
{
int ret = camera_->allocateBuffers();
return ret == -EACCES ? -EBUSY : ret;
if (ret)
return ret == -EACCES ? -EBUSY : ret;
Stream *stream = *camera_->streams().begin();
return bufferAllocator_->allocate(stream);
}
void V4L2Camera::freeBuffers()
{
Stream *stream = *camera_->streams().begin();
bufferAllocator_->free(stream);
camera_->freeBuffers();
}
FileDescriptor V4L2Camera::getBufferFd(unsigned int index)
{
Stream *stream = *camera_->streams().begin();
return stream->buffers()[index].planes()[0].fd;
const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
bufferAllocator_->buffers(stream);
if (buffers.size() <= index)
return FileDescriptor();
return buffers[index]->planes()[0].fd;
}
int V4L2Camera::streamOn()
@ -180,21 +189,16 @@ int V4L2Camera::streamOff()
int V4L2Camera::qbuf(unsigned int index)
{
Stream *stream = config_->at(0).stream();
std::unique_ptr<Buffer> buffer = stream->createBuffer(index);
if (!buffer) {
LOG(V4L2Compat, Error) << "Can't create buffer";
return -ENOMEM;
}
std::unique_ptr<Request> request =
std::unique_ptr<Request>(camera_->createRequest());
std::unique_ptr<Request>(camera_->createRequest(index));
if (!request) {
LOG(V4L2Compat, Error) << "Can't create request";
return -ENOMEM;
}
int ret = request->addBuffer(stream, std::move(buffer));
Stream *stream = config_->at(0).stream();
FrameBuffer *buffer = bufferAllocator_->buffers(stream)[index].get();
int ret = request->addBuffer(stream, buffer);
if (ret < 0) {
LOG(V4L2Compat, Error) << "Can't set buffer for request";
return -ENOMEM;