When a supplied buffer is too small to hold the preview frame data, preview callback will return null and the buffer will be removed from the buffer queue. Whether or not auto-focus is currently in progress, this function will return the focus position to the default.
If the camera does not support auto-focus, this is a no-op. Note that devices may not always allow disabling the camera shutter sound.
I had to recompile a custom kernel to enable USB_VIDEO_CLASS option.
With new kernel i have no problems to get frames from my camera with an app named dashcam.
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Instead of an FAQ, if you can't get the library to work, try one of these suggestions.
When talking about Android compatibility in relation to Sailfish OS, there are two distinct possible meanings.
This page gives an overview of the ways in which Sailfish OS provides Android compatibility in relation to those distinct meanings.
The Camera class is used to set image capture settings, start/stop preview, snap pictures, and retrieve frames for encoding for video.
This class is a client for the Camera service, which manages the actual camera hardware.
To access the device camera, you must declare the Adds a pre-allocated buffer to the preview callback buffer queue.
Applications can add one or more buffers to the queue.
When a preview frame arrives and there is still at least one available buffer, the buffer will be used and removed from the queue. If a frame arrives and there is no buffer left, the frame is discarded.