Commit graph

95 commits

Author SHA1 Message Date
Romain Vimont
ec71a3f66a Use two sockets for video and control
The socket used the device-to-computer direction to stream the video and
the computer-to-device direction to send control events.

Some features, like copy-paste from device to computer, require to send
non-video data from the device to the computer.

To make them possible, use two sockets:
 - one for streaming the video from the device to the client;
 - one for control/events in both directions.
2019-05-30 22:35:41 +02:00
Romain Vimont
47f1003200 Close server socket before killing process
The sockets may be closed and shutdown on server_stop(). This will
interrupt the stream and controller threads more quickly and gracefully.
2019-05-30 22:30:18 +02:00
Romain Vimont
0dee9b04b2 Use net_recv() to read only one byte
Partial read is impossible for 1 byte, so net_recv_all() is useless.
2019-05-30 22:30:18 +02:00
Romain Vimont
8fc58bde75 Simplify server_connect_to()
Only use 2 branches, using either forward or remote tunnel.
2019-05-30 22:30:18 +02:00
Romain Vimont
5a431cdf9b Make server_connect_to() return a bool
The resulting socket is accessible from the server instance, there is no
need to return it.

This paves the way to use several sockets in parallel.
2019-05-30 22:30:18 +02:00
Romain Vimont
b3bd5f1b80 Remove useless casts to (void *) 2019-05-24 17:23:21 +02:00
Romain Vimont
9ef345fdd0 Make owned serial a pointer-to-non-const
The server owns the serial, so it needs to free it. Therefore, it should
not be a pointer-to-const.
2019-03-03 00:01:16 +01:00
Romain Vimont
dfed1b250e Replace SDL types by C99 standard types
Scrcpy is a C11 project. Use the C99 standard types instead of the
SDL-specific types:

    SDL_bool -> bool
    SintXX   -> intXX_t
    UintXX   -> uintXX_t
2019-03-02 23:55:23 +01:00
Romain Vimont
aeda583a2c Update code style
Limit source code to 80 chars, and declare functions return type and
modifiers on a separate line.

This allows to avoid very long lines, and all function names are
aligned.

(We do this on VLC, and I like it.)
2019-03-02 20:28:46 +01:00
Romain Vimont
39c5e71605 Make the server unlink itself
To clean up the device, the client executed "adb shell rm" once the
server was guaranteed to be started (after the connection succeeded).

This implied to track whether the installation state, and failed if an
additional tunnel was used in "forward" mode:
<https://github.com/Genymobile/scrcpy/issues/386#issuecomment-453936034>

Instead, make the server unlink itself on start.
2019-01-14 21:12:23 +01:00
Romain Vimont
1e22ebcac2 Always use non-empty arguments
The client passes parameters to the server via "adb shell" arguments.

Use "-" instead of "" when no crop is specified to avoid empty
arguments, which are not handled the same way on all devices.

Fixed <https://github.com/Genymobile/scrcpy/issues/337>.
2018-11-16 18:39:41 +01:00
Romain Vimont
345f8858d3 Send frame meta only if recording is enabled
The client needs the PTS for each frame only if recording is enabled.
Otherwise, the PTS are not necessary, and the protocol is more
straighforward.
2018-11-11 21:37:31 +01:00
Romain Vimont
caa9e30004 Add crop feature
Add an option to crop the screen on the server. This allows to mirror
only part of the device screen.
2018-08-09 19:12:27 +02:00
Romain Vimont
8793c104ee Increase "adb forward" connection attempts
5 seconds might not be sufficient:
<https://github.com/Genymobile/scrcpy/issues/213>

Increase to 10 seconds (it does not harm).
2018-08-09 18:22:42 +02:00
Romain Vimont
ec02823045 Fix leak on server start error
Fail on SDL_strdup() failure, and free the duplicated serial on further
error.
2018-05-26 14:20:05 +02:00
Romain Vimont
435a7fe314 Add missing includes
Include string.h and stdio.h explicitly.
2018-05-13 15:33:13 +02:00
Romain Vimont
f00c6c5b13 Disable custom SDL signal handlers
Request SDL not to replace the SIGINT and SIGTERM handlers, so that the
process is immediately terminated on Ctrl+C.

This avoids process hanging on Ctrl+C during network calls on
initialization.

Some of them accepted a timeout, but it was not used since
commit 9b056f5091 anymore.
2018-03-21 21:43:12 +01:00
Romain Vimont
c65cb36d3b Increase the number of connection attempts
In "adb forward" mode, it may take a while before the server socket is
listening, so increase the number of connection attempts.

See <https://github.com/Genymobile/scrcpy/issues/5#issuecomment-373718551>.
2018-03-16 14:59:08 +01:00
Romain Vimont
1038bad385 Make it work over tcpip
"adb reverse" currently does not work over tcpip (i.e. on a device
connected by "adb connect"):
<https://issuetracker.google.com/issues/37066218>

To work around the problem, if the call to "adb reverse" fails, then
fallback to "adb forward", and reverse the client/server roles.

Keep the "adb reverse" mode as the default because it does not involve
connection retries: when using "adb forward", the client must try to
connect successively until the server listens.

Due to the tunnel, every connect() will succeed, so the client must
attempt to read() to detect a connection failure. For this purpose, when
using the "adb forward" mode, the server initially writes a dummy byte,
read by the client.

Fixes <https://github.com/Genymobile/scrcpy/issues/5>.
2018-03-12 14:10:32 +01:00
Romain Vimont
2b3ed5bcdb Store serial in server instance
The serial is needed for many server actions, but this is an
implementation detail, so the caller should not have to provide it on
every call.

Instead, store the serial in the server instance on server_start().

This paves the way to implement the "adb forward" fallback properly.
2018-03-12 14:10:32 +01:00
Romain Vimont
acd2dc3183 Shutdown sockets before closing
The server socket does not release the port it was listening for if we
just close it: we must also shutdown it.
2018-03-07 18:04:39 +01:00
Romain Vimont
e6feb991db Fix comment typo
Replace "at network level" by "at the network level".
2018-03-07 18:04:38 +01:00
Romain Vimont
c78ad6377c Terminate the server on stop
On user request to quit, two kinds of blocking calls must be interrupted
on the server:
 1. the reads from and writes to the socket;
 2. the call to MediaCodec.dequeueOutputBuffer().

The former case was handled by calling shutdown() on the socket from the
client, but the latter was not managed.

There is no easy way to wake this call properly, so just terminate the
process from the client (i.e. send SIGTERM on Linux) instead.
2018-02-28 16:56:20 +01:00
Romain Vimont
221a7d0826 Clean up the server from temporary folder
The server is copied to /data/local/tmp/scrcpy-server.jar and executed
on the device.

As soon as we are connected, we can unlink (rm) it from /data/local/tmp,
to keep the device clean.
2018-02-28 15:27:45 +01:00
Romain Vimont
487cb10cf0 Rename ScrCpyServer to Server
The Server class is in package scrcpy, there is no need to repeat the
name in the classname.
2018-02-28 14:57:18 +01:00
Romain Vimont
089378926b Rename SCRCPY_SERVER_JAR to SCRCPY_SERVER_PATH
The server is currently a JAR, but it may ba an APK or a DEX, so the
variable name should not contain the type.

Rename the environment variable, the Meson options and the C
definitions.
2018-02-16 15:36:25 +01:00
Romain Vimont
6db22ef339 Log socket errors
Do not silently ignore close() and shutdown() errors, and use perror()
to get the errno.
2018-02-16 15:03:50 +01:00
Romain Vimont
ad6209f6ff Terminate the device process gracefully
Call shutdown() on the device socket to make the device process finish
its execution quickly and gracefully, without killing it.
2018-02-16 11:47:42 +01:00
Romain Vimont
9b056f5091 Replace SDL_net by custom implementation
SDL_net is not very suitable for scrcpy.

For example, SDLNet_TCP_Accept() is non-blocking, so we have to wrap it
by calling many SDL_Net-specific functions to make it blocking.

But above all, SDLNet_TCP_Open() is a server socket only when no IP is
provided; otherwise, it's a client socket. Therefore, it is not possible
to create a server socket bound to localhost, so it accepts connections
from anywhere.

This is a problem for scrcpy, because on start, the application listens
for nearly 1 second until it accepts the first connection, supposedly
from the device. If someone on the local network manages to connect to
the server socket first, then they can stream arbitrary H.264 video.
This may be troublesome, for example during a public presentation ;-)

Provide our own simplified API (net.h) instead, implemented for the
different platforms.
2018-02-16 00:56:58 +01:00
Romain Vimont
ff94462d8a Refactor build system
The client was built with Meson, the server with Gradle, and were run by
a Makefile.

Add a Meson script for the server (which delegates to Gradle), and a
parent script to build and install both the client and the server to the
system, typically with:

    meson --buildtype release build
    cd build
    ninja
    sudo ninja install

In addition, use a separate Makefile to build a "portable" version of
the application (where the client expects the server to be in the
current directory). Typically:

    make release-portable
    cd dist/scrcpy
    ./scrcpy

This is especially useful for Windows builds, which are not "installed".
2018-02-14 09:23:14 +01:00
Romain Vimont
3ed80a1fac Define macros wrappers for logs
Use macros to wrap SDL_Log* functions with the "application" category.
2018-02-13 10:10:18 +01:00
Romain Vimont
6fe65d9f5c Log with category APPLICATION
All our logs should use APPLICATION category. The logs for other
categories are not printed by default under the "critical" level.
2018-02-12 16:09:34 +01:00
Romain Vimont
eb09fefd43 Timeout the server socket connection
Wait no more than 2 seconds for accepting the connection from the
device, since it blocks the event loop, preventing to react to SIGTERM
(Ctrl+C).
2018-02-09 16:21:10 +01:00
Romain Vimont
4662198261 Do not release TCP sockets while still in use
SDLNet_TCP_Close() not only closes, but also release the resources.

Therefore, we must not close the socket if another thread attempts to
read it.

For that purpose, move socket closing from server_stop() to
server_destroy().
2018-02-09 12:59:36 +01:00
Romain Vimont
7458d8271e Kill the server immediately on close
Do not wait 100ms anymore to let the server print any exception: we
justly want to ignore them.

Moreover, there is no nanosleep() on Windows, so this solve another
problem.
2018-02-09 11:01:50 +01:00
Romain Vimont
e1749a0c09 Remove the "adb reverse" tunnel immediately
As soon as we accepted a connection, we can remove the "adb reverse"
tunnel.
2018-02-08 17:40:09 +01:00
Romain Vimont
28c5cc030b Move server-related code to server.c
The file server.c already existed, but exposed a low-level API. Make it
higher-level, so that scrcpy.c does not handle server details directly.
2018-02-08 17:40:09 +01:00
Romain Vimont
1faf6cfd9d Rename the server scrcpy-server.jar
The server is built as an APK to simplify the build, but in fact this is
a simple jar (it is not even signed).

In order to avoid confusion, rename it to .jar, so that users do not try
to "adb install" it.

Also rename it from "scrcpy" to "scrcpy-server" to distinguish from the
client-side.
2018-02-02 09:37:10 +01:00
Romain Vimont
2172c53b7b Force the server target filename
The server path may be customized using SCRCPY_APK. If its basename is
different from "scrcpy.apk", it will be pushed with a different name,
so the execution would fail.

Therefore, force the push target filename.
2018-02-02 09:34:52 +01:00
Romain Vimont
6b546a87ab Add bit-rate command-line option
Add a command-line option (-b/--bit-rate) to customize the video
bit-rate.
2018-02-01 17:11:40 +01:00
Romain Vimont
ee93f3f23a Rename maximum_size to max_size
The long option is --max-size, so for consistency, adapt the code
accordingly.
2018-02-01 17:11:40 +01:00
Romain Vimont
b67907e24e Convert server to an Android project
To simplify the device server-side build, use gradle to create an APK,
even if we use it as a simple jar, by running its main() method.
2018-01-30 12:01:36 +01:00
Romain Vimont
89f6a3cfe7 Handle resized video stream
Accept a parameter to limit the video size.

For instance, with "-m 960", the great side of the video will be scaled
down to 960 (if necessary), while the other side will be scaled down so
that the aspect ratio is preserved. Both dimensions must be a multiple
of 8, so black bands might be added, and the mouse positions must be
computed accordingly.
2018-01-29 15:40:33 +01:00
Romain Vimont
d7b00a9bab Move server-related functions to server.c
In addition to the functions to start/stop the server, move the
functions to push the jar and enable/disable the "adb reverse" tunnel.
2018-01-23 16:20:03 +01:00
Romain Vimont
7d67696b7e Extract server-related functions
To lighten screen.c, move start_server() and stop_server() to a separate
file.
2018-01-22 11:29:44 +01:00