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v4l2: v4l2_camera: Return int in getBufferFd()

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V4L2Camera::getBufferFd() returns FileDescriptor. However, the
file descriptor is still owned by V4L2Camera. It should rather
return an integer to represent V4L2Camera doesn't have the
ownership of the file descriptor.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Hirokazu Honda 2021-06-10 16:50:27 +09:00 • committed by Laurent Pinchart
parent 1af788a8fb
commit 3dc3e2e61e
3 changed files with 7 additions and 7 deletions
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6
src/v4l2/v4l2_camera.cpp
View file

@ -186,16 +186,16 @@ void V4L2Camera::freeBuffers()
bufferAllocator_->free(stream);
}
FileDescriptor V4L2Camera::getBufferFd(unsigned int index)
int V4L2Camera::getBufferFd(unsigned int index)
{
Stream *stream = config_->at(0).stream();
const std::vector<std::unique_ptr<FrameBuffer>> &buffers =
bufferAllocator_->buffers(stream);
if (buffers.size() <= index)
return FileDescriptor();
return -1;
return buffers[index]->planes()[0].fd;
return buffers[index]->planes()[0].fd.fd();
}
int V4L2Camera::streamOn()

2
src/v4l2/v4l2_camera.h
View file

@ -51,7 +51,7 @@ public:
int allocBuffers(unsigned int count);
void freeBuffers();
libcamera::FileDescriptor getBufferFd(unsigned int index);
int getBufferFd(unsigned int index);
int streamOn();
int streamOff();

6
src/v4l2/v4l2_camera_proxy.cpp
View file

@ -114,14 +114,14 @@ void *V4L2CameraProxy::mmap(void *addr, size_t length, int prot, int flags,
return MAP_FAILED;
}
FileDescriptor fd = vcam_->getBufferFd(index);
if (!fd.isValid()) {
int fd = vcam_->getBufferFd(index);
if (fd < 0) {
errno = EINVAL;
return MAP_FAILED;
}
void *map = V4L2CompatManager::instance()->fops().mmap(addr, length, prot,
flags, fd.fd(), 0);
flags, fd, 0);
if (map == MAP_FAILED)
return map;