diff options
| -rw-r--r-- | src/libcamera/include/v4l2_device.h | 3 | ||||
| -rw-r--r-- | src/libcamera/v4l2_device.cpp | 45 |
2 files changed, 48 insertions, 0 deletions
diff --git a/src/libcamera/include/v4l2_device.h b/src/libcamera/include/v4l2_device.h index 30a8f77d..988e646c 100644 --- a/src/libcamera/include/v4l2_device.h +++ b/src/libcamera/include/v4l2_device.h @@ -103,6 +103,9 @@ public: int queueBuffer(Buffer *buffer); Signal<Buffer *> bufferReady; + int streamOn(); + int streamOff(); + private: int getFormatSingleplane(V4L2DeviceFormat *format); int setFormatSingleplane(V4L2DeviceFormat *format); diff --git a/src/libcamera/v4l2_device.cpp b/src/libcamera/v4l2_device.cpp index 134a468c..f9839fc7 100644 --- a/src/libcamera/v4l2_device.cpp +++ b/src/libcamera/v4l2_device.cpp @@ -756,4 +756,49 @@ void V4L2Device::bufferAvailable(EventNotifier *notifier) * \brief A Signal emitted when a buffer completes */ +/** + * \brief Start the video stream + * + * \return 0 on success or a negative error code otherwise + */ +int V4L2Device::streamOn() +{ + int ret; + + ret = ioctl(fd_, VIDIOC_STREAMON, &bufferType_); + if (ret < 0) { + ret = -errno; + LOG(V4L2, Error) + << "Failed to start streaming: " << strerror(-ret); + return ret; + } + + return 0; +} + +/** + * \brief Stop the video stream + * + * \todo Ensure completion notifications are sent for all queued buffers + * + * \return 0 on success or a negative error code otherwise + */ +int V4L2Device::streamOff() +{ + int ret; + + ret = ioctl(fd_, VIDIOC_STREAMOFF, &bufferType_); + if (ret < 0) { + ret = -errno; + LOG(V4L2, Error) + << "Failed to stop streaming: " << strerror(-ret); + return ret; + } + + queuedBuffersCount_ = 0; + fdEvent_->setEnabled(false); + + return 0; +} + } /* namespace libcamera */ |