It is recommended to send the current rotation direction of the device when the device is rotated.

[sbfkcel]

• I have checked that a similar Listen for rotation does not already exist.

Is your feature request related to a problem? Please describe.
Monitors the device's rotation direction.

Describe the solution you'd like
When the screen size changes, the screen rotation direction is obtained and sent out through the socket along with the key frame data before or after SPS.

Describe alternatives you've considered
This is useful if you need to draw the device appearance correctly. Although it is also possible to obtain it through adb, there are delays or instabilities.

Additional context
Related Discussions

#3605

#925

[rom1v]

In scrcpy, the video frame size (known once the frame is decoded) is sufficient, so it does not transmit an additional rotation.

Moreover, it is not always obvious what the rotation value should be in all cases:

• scrcpy --new-display=1920x1080
• scrcpy --new-display=1080x1920
• scrcpy --capture-orientation=90 (when the device is initially portrait)
• scrcpy --capture-orientation=90 (when the device is initially landscape)
• scrcpy --capture-orientation=flip90 (…)
• scrcpy --video-source=camera …

[sbfkcel]

Yes, for the screen display, the exact direction is not required. By parsing the SPS of the keyframe, the width and height of the screen can be obtained, thereby determining whether the screen is displayed in landscape or portrait.

But in some cases, it would be good to have the correct device rotation direction. For example, it is necessary to correctly draw the appearance of a device, or simulate the shape of the screen (so far, there are too many screens of different shapes);