NekoCWD/libcamera
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libcamera: v4l2_device: Support queueing buffers to an output device

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To queue a buffer to an output device, we must set the buffer properties.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
This commit is contained in:
Kieran Bingham 2019-02-13 12:18:19 +00:00
parent 1db3ea08b6
commit 8a46873e04
1 changed files with 16 additions and 1 deletions
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17
src/libcamera/v4l2_device.cpp
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@ -299,7 +299,15 @@ int V4L2Device::open()
? V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE
: V4L2_BUF_TYPE_VIDEO_OUTPUT;
fdEvent_ = new EventNotifier(fd_, EventNotifier::Read);
/*
* We wait for Read notifications on CAPTURE devices (POLLIN), and
* Write notifications for OUTPUT devices (POLLOUT).
*/
if (caps_.isCapture())
fdEvent_ = new EventNotifier(fd_, EventNotifier::Read);
else
fdEvent_ = new EventNotifier(fd_, EventNotifier::Write);
fdEvent_->activated.connect(this, &V4L2Device::bufferAvailable);
fdEvent_->setEnabled(false);
@ -677,6 +685,13 @@ int V4L2Device::queueBuffer(Buffer *buffer)
buf.m.planes = planes;
}
if (V4L2_TYPE_IS_OUTPUT(bufferType_)) {
buf.bytesused = buffer->bytesused_;
buf.sequence = buffer->sequence_;
buf.timestamp.tv_sec = buffer->timestamp_ / 1000000000;
buf.timestamp.tv_usec = (buffer->timestamp_ / 1000) % 1000000;
}
LOG(V4L2, Debug) << "Queueing buffer " << buf.index;
ret = ioctl(fd_, VIDIOC_QBUF, &buf);