mirror of https://github.com/Genymobile/scrcpy
Update DEVELOP.md
This commit is contained in:
Romain Vimont
parent
ffe0417228
commit
5ffdcbb7be
75
DEVELOP.md
75
DEVELOP.md
|
|
@ -32,7 +32,7 @@ The server is a Java application (with a [`public static void main(String...
|
|||
args)`][main] method), compiled against the Android framework, and executed as
|
||||
`shell` on the Android device.
|
||||
|
||||
[main]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/Server.java#L100
|
||||
[main]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/Server.java#L123
|
||||
|
||||
To run such a Java application, the classes must be [_dexed_][dex] (typically,
|
||||
to `classes.dex`). If `my.package.MainClass` is the main class, compiled to
|
||||
|
|
@ -65,18 +65,18 @@ They can be called using reflection though. The communication with hidden
|
|||
components is provided by [_wrappers_ classes][wrappers] and [aidl].
|
||||
|
||||
[hidden]: https://stackoverflow.com/a/31908373/1987178
|
||||
[wrappers]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/wrappers
|
||||
[aidl]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/aidl/android/view
|
||||
[wrappers]: https://github.com/Genymobile/scrcpy/tree/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/wrappers
|
||||
[aidl]: https://github.com/Genymobile/scrcpy/tree/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/aidl/android/view
|
||||
|
||||
|
||||
### Threading
|
||||
|
||||
The server uses 2 threads:
|
||||
The server uses 3 threads:
|
||||
|
||||
- the **main** thread, encoding and streaming the video to the client;
|
||||
- the **controller** thread, listening for _control events_ (typically,
|
||||
keyboard and mouse events) from the client.
|
||||
- the **receiver** thread (managed by the controller), sending _device events_
|
||||
- the **controller** thread, listening for _control messages_ (typically,
|
||||
keyboard and mouse events) from the client;
|
||||
- the **receiver** thread (managed by the controller), sending _device messges_
|
||||
to the clients (currently, it is only used to send the device clipboard
|
||||
content).
|
||||
|
||||
|
|
@ -92,9 +92,9 @@ The video is encoded using the [`MediaCodec`] API. The codec takes its input
|
|||
from a [surface] associated to the display, and writes the resulting H.264
|
||||
stream to the provided output stream (the socket connected to the client).
|
||||
|
||||
[`ScreenEncoder`]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
|
||||
[`ScreenEncoder`]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
|
||||
[`MediaCodec`]: https://developer.android.com/reference/android/media/MediaCodec.html
|
||||
[surface]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L69-L70
|
||||
[surface]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L68-L69
|
||||
|
||||
On device [rotation], the codec, surface and display are reinitialized, and a
|
||||
new video stream is produced.
|
||||
|
|
@ -108,31 +108,30 @@ because it avoids to send unnecessary frames, but there are drawbacks:
|
|||
Both problems are [solved][repeat] by the flag
|
||||
[`KEY_REPEAT_PREVIOUS_FRAME_AFTER`][repeat-flag].
|
||||
|
||||
[rotation]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L90
|
||||
[repeat]:
|
||||
https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L147-L148
|
||||
[rotation]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L90
|
||||
[repeat]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java#L147-L148
|
||||
[repeat-flag]: https://developer.android.com/reference/android/media/MediaFormat.html#KEY_REPEAT_PREVIOUS_FRAME_AFTER
|
||||
|
||||
|
||||
### Input events injection
|
||||
|
||||
_Control events_ are received from the client by the [`EventController`] (run in
|
||||
a separate thread). There are several types of input events:
|
||||
_Control messages_ are received from the client by the [`Controller`] (run in a
|
||||
separate thread). There are several types of input events:
|
||||
- keycode (cf [`KeyEvent`]),
|
||||
- text (special characters may not be handled by keycodes directly),
|
||||
- mouse motion/click,
|
||||
- mouse scroll,
|
||||
- other commands (e.g. to switch the screen on or to copy the clipboard).
|
||||
|
||||
All of them may need to inject input events to the system. To do so, they use
|
||||
the _hidden_ method [`InputManager.injectInputEvent`] (exposed by our
|
||||
Some of them need to inject input events to the system. To do so, they use the
|
||||
_hidden_ method [`InputManager.injectInputEvent`] (exposed by our
|
||||
[`InputManager` wrapper][inject-wrapper]).
|
||||
|
||||
[`EventController`]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/EventController.java#L66
|
||||
[`Controller`]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/Controller.java#L81
|
||||
[`KeyEvent`]: https://developer.android.com/reference/android/view/KeyEvent.html
|
||||
[`MotionEvent`]: https://developer.android.com/reference/android/view/MotionEvent.html
|
||||
[`InputManager.injectInputEvent`]: https://android.googlesource.com/platform/frameworks/base/+/oreo-release/core/java/android/hardware/input/InputManager.java#857
|
||||
[inject-wrapper]: https://github.com/Genymobile/scrcpy/blob/v1.8/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java#L27
|
||||
[inject-wrapper]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/server/src/main/java/com/genymobile/scrcpy/wrappers/InputManager.java#L27
|
||||
|
||||
|
||||
|
||||
|
|
@ -188,12 +187,13 @@ The client uses 4 threads:
|
|||
- the **main** thread, executing the SDL event loop,
|
||||
- the **stream** thread, receiving the video and used for decoding and
|
||||
recording,
|
||||
- the **controller** thread, sending _control events_ to the server.
|
||||
- the **controller** thread, sending _control messages_ to the server,
|
||||
- the **receiver** thread (managed by the controller), receiving _device
|
||||
events_ from the client.
|
||||
messages_ from the client.
|
||||
|
||||
In addition, another thread can be started if necessary to handle APK
|
||||
installation or file push requests (via drag&drop on the main window).
|
||||
installation or file push requests (via drag&drop on the main window) or to
|
||||
print the framerate regularly in the console.
|
||||
|
||||
|
||||
|
||||
|
|
@ -217,10 +217,10 @@ to decode a new frame while the main thread renders the last one.
|
|||
If a [recorder] is present (i.e. `--record` is enabled), then its muxes the raw
|
||||
H.264 packet to the output video file.
|
||||
|
||||
[stream]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/stream.h
|
||||
[decoder]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/decoder.h
|
||||
[video_buffer]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/video_buffer.h
|
||||
[recorder]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/recorder.h
|
||||
[stream]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/stream.h
|
||||
[decoder]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/decoder.h
|
||||
[video_buffer]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/video_buffer.h
|
||||
[recorder]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/recorder.h
|
||||
|
||||
```
|
||||
+----------+ +----------+
|
||||
|
|
@ -234,19 +234,19 @@ H.264 packet to the output video file.
|
|||
|
||||
### Controller
|
||||
|
||||
The [controller] is responsible to send _control events_ to the device. It runs
|
||||
in a separate thread, to avoid I/O on the main thread.
|
||||
The [controller] is responsible to send _control messages_ to the device. It
|
||||
runs in a separate thread, to avoid I/O on the main thread.
|
||||
|
||||
On SDL event, received on the main thread, the [input manager][inputmanager]
|
||||
creates appropriate [_control events_][controlevent]. It is responsible to
|
||||
creates appropriate [_control messages_][controlmsg]. It is responsible to
|
||||
convert SDL events to Android events (using [convert]). It pushes the _control
|
||||
events_ to a queue hold by the controller. On its own thread, the controller
|
||||
takes events from the queue, that it serializes and sends to the client.
|
||||
messages_ to a queue hold by the controller. On its own thread, the controller
|
||||
takes messages from the queue, that it serializes and sends to the client.
|
||||
|
||||
[controller]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/controller.h
|
||||
[controlevent]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/control_event.h
|
||||
[inputmanager]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/input_manager.h
|
||||
[convert]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/convert.h
|
||||
[controller]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/controller.h
|
||||
[controlmsg]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/control_msg.h
|
||||
[inputmanager]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/input_manager.h
|
||||
[convert]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/convert.h
|
||||
|
||||
|
||||
### UI and event loop
|
||||
|
|
@ -257,10 +257,9 @@ thread.
|
|||
Events are handled in the [event loop], which either updates the [screen] or
|
||||
delegates to the [input manager][inputmanager].
|
||||
|
||||
[scrcpy]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/scrcpy.c
|
||||
[event loop]:
|
||||
https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/scrcpy.c#L187
|
||||
[screen]: https://github.com/Genymobile/scrcpy/blob/v1.8/app/src/screen.h
|
||||
[scrcpy]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/scrcpy.c
|
||||
[event loop]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/scrcpy.c#L201
|
||||
[screen]: https://github.com/Genymobile/scrcpy/blob/ffe0417228fb78ab45b7ee4e202fc06fc8875bf3/app/src/screen.h
|
||||
|
||||
|
||||
## Hack
|
||||
|
|
|
|||
Loading…
Reference in New Issue