Commit graph

79 commits

Author SHA1 Message Date
Romain Vimont
1f8ba1ca79 Include config.h everywhere
Ref: <https://github.com/Genymobile/scrcpy/issues/829>

Suggested-by: Louis Kruger <louisk@gmail.com>
2019-09-29 22:39:53 +02:00
Romain Vimont
63af7fbafe Reduce latency by 1 frame
To packetize the H.264 raw stream, av_parser_parse2() (called by
av_read_frame()) knows that it has received a full frame only after it
has received some data for the next frame. As a consequence, the client
always waited until the next frame before sending the current frame to
the decoder!

On the device side, we know packets boundaries. To reduce latency,
make the device always transmit the "frame meta" to packetize the stream
manually (it was already implemented to send PTS, but only enabled on
recording).

On the client side, replace av_read_frame() by manual packetizing and
parsing.

<https://stackoverflow.com/questions/50682518/replacing-av-read-frame-to-reduce-delay>
<https://trac.ffmpeg.org/ticket/3354>
2019-07-31 01:55:32 +02:00
Romain Vimont
acc4dcd520 Disable server controller if --no-control
If --no-control is disabled, there is no need for a controller.

It also avoids to power on the device on start if control is disabled.
2019-06-05 00:25:57 +02:00
Romain Vimont
ca767ba364 Group server params in a struct
Starting the server requires more and more parameters. For clarity,
group them in a struct.
2019-06-05 00:25:57 +02:00
Romain Vimont
5b56900e2b Rename unused field
The flag is used only in the server_start() implementation, there is no
need to store it in the structure.
2019-06-04 21:29:14 +02:00
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
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
d2504f974c Fix indentation
Previous refactorings broke indentation.
2019-05-30 22:30:18 +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
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
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
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
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
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
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
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
14c58546a7 Add missing include guards
In practice, these headers are included only once, but it's a good
practice to always use include guards.
2018-02-08 15:26:08 +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
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