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Add crop feature

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Add an option to crop the screen on the server. This allows to mirror
only part of the device screen.
This commit is contained in:
Romain Vimont 2018-08-09 19:12:27 +02:00
parent e85010fbc2
commit caa9e30004
11 changed files with 106 additions and 24 deletions
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6
README.md
View file

@ -294,6 +294,12 @@ screen is smaller, or cannot decode such a high definition):
scrcpy -m 1024
```
The device screen may be cropped to mirror only part of the screen:
```bash
scrcpy -c 1224:1440:0:0 # 1224x1440 at offset (0,0)
```
If several devices are listed in `adb devices`, you must specify the _serial_:
```bash

15
app/src/main.c
View file

@ -10,6 +10,7 @@
struct args {
const char *serial;
const char *crop;
SDL_bool help;
SDL_bool version;
SDL_bool show_touches;
@ -29,6 +30,12 @@ static void usage(const char *arg0) {
" Unit suffixes are supported: 'K' (x1000) and 'M' (x1000000).\n"
" Default is %d.\n"
"\n"
" -c, --crop width:height:x:y\n"
" Crop the device screen on the server.\n"
" The values are expressed in the device natural orientation\n"
" (typically, portrait for a phone, landscape for a tablet).\n"
" Any --max-size value is computed on the cropped size.\n"
"\n"
" -h, --help\n"
" Print this help.\n"
"\n"
@ -192,6 +199,7 @@ static SDL_bool parse_port(char *optarg, Uint16 *port) {
static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
static const struct option long_options[] = {
{"bit-rate", required_argument, NULL, 'b'},
{"crop", required_argument, NULL, 'c'},
{"help", no_argument, NULL, 'h'},
{"max-size", required_argument, NULL, 'm'},
{"port", required_argument, NULL, 'p'},
@ -201,13 +209,16 @@ static SDL_bool parse_args(struct args *args, int argc, char *argv[]) {
{NULL, 0, NULL, 0 },
};
int c;
while ((c = getopt_long(argc, argv, "b:hm:p:s:tv", long_options, NULL)) != -1) {
while ((c = getopt_long(argc, argv, "b:c:hm:p:s:tv", long_options, NULL)) != -1) {
switch (c) {
case 'b':
if (!parse_bit_rate(optarg, &args->bit_rate)) {
return SDL_FALSE;
}
break;
case 'c':
args->crop = optarg;
break;
case 'h':
args->help = SDL_TRUE;
break;
@ -253,6 +264,7 @@ int main(int argc, char *argv[]) {
#endif
struct args args = {
.serial = NULL,
.crop = NULL,
.help = SDL_FALSE,
.version = SDL_FALSE,
.show_touches = SDL_FALSE,
@ -288,6 +300,7 @@ int main(int argc, char *argv[]) {
struct scrcpy_options options = {
.serial = args.serial,
.crop = args.crop,
.port = args.port,
.max_size = args.max_size,
.bit_rate = args.bit_rate,

2
app/src/scrcpy.c
View file

@ -126,7 +126,7 @@ static void wait_show_touches(process_t process) {
SDL_bool scrcpy(const struct scrcpy_options *options) {
if (!server_start(&server, options->serial, options->port,
options->max_size, options->bit_rate)) {
options->max_size, options->bit_rate, options->crop)) {
return SDL_FALSE;
}

1
app/src/scrcpy.h
View file

@ -5,6 +5,7 @@
struct scrcpy_options {
const char *serial;
const char *crop;
Uint16 port;
Uint16 max_size;
Uint32 bit_rate;

9
app/src/server.c
View file

@ -77,7 +77,8 @@ static SDL_bool disable_tunnel(struct server *server) {
}
static process_t execute_server(const char *serial,
Uint16 max_size, Uint32 bit_rate, SDL_bool tunnel_forward) {
Uint16 max_size, Uint32 bit_rate,
const char *crop, SDL_bool tunnel_forward) {
char max_size_string[6];
char bit_rate_string[11];
sprintf(max_size_string, "%"PRIu16, max_size);
@ -91,6 +92,7 @@ static process_t execute_server(const char *serial,
max_size_string,
bit_rate_string,
tunnel_forward ? "true" : "false",
crop ? crop : "",
};
return adb_execute(serial, cmd, sizeof(cmd) / sizeof(cmd[0]));
}
@ -147,7 +149,7 @@ void server_init(struct server *server) {
}
SDL_bool server_start(struct server *server, const char *serial, Uint16 local_port,
Uint16 max_size, Uint32 bit_rate) {
Uint16 max_size, Uint32 bit_rate, const char *crop) {
server->local_port = local_port;
if (serial) {
@ -188,7 +190,8 @@ SDL_bool server_start(struct server *server, const char *serial, Uint16 local_po
}
// server will connect to our server socket
server->process = execute_server(serial, max_size, bit_rate, server->tunnel_forward);
server->process = execute_server(serial, max_size, bit_rate, crop,
server->tunnel_forward);
if (server->process == PROCESS_NONE) {
if (!server->tunnel_forward) {
close_socket(&server->server_socket);

2
app/src/server.h
View file

@ -31,7 +31,7 @@ void server_init(struct server *server);
// push, enable tunnel et start the server
SDL_bool server_start(struct server *server, const char *serial, Uint16 local_port,
Uint16 max_size, Uint32 bit_rate);
Uint16 max_size, Uint32 bit_rate, const char *crop);
// block until the communication with the server is established
socket_t server_connect_to(struct server *server);

42
server/src/main/java/com/genymobile/scrcpy/Device.java
View file

@ -3,6 +3,7 @@ package com.genymobile.scrcpy;
import com.genymobile.scrcpy.wrappers.ServiceManager;
import android.graphics.Point;
import android.graphics.Rect;
import android.os.Build;
import android.os.RemoteException;
import android.view.IRotationWatcher;
@ -20,7 +21,7 @@ public final class Device {
private RotationListener rotationListener;
public Device(Options options) {
screenInfo = computeScreenInfo(options.getMaxSize());
screenInfo = computeScreenInfo(options.getCrop(), options.getMaxSize());
registerRotationWatcher(new IRotationWatcher.Stub() {
@Override
public void onRotationChanged(int rotation) throws RemoteException {
@ -40,23 +41,40 @@ public final class Device {
return screenInfo;
}
private ScreenInfo computeScreenInfo(int maxSize) {
private ScreenInfo computeScreenInfo(Rect crop, int maxSize) {
DisplayInfo displayInfo = serviceManager.getDisplayManager().getDisplayInfo();
boolean rotated = (displayInfo.getRotation() & 1) != 0;
Size deviceSize = displayInfo.getSize();
Size videoSize = computeVideoSize(deviceSize, maxSize);
return new ScreenInfo(deviceSize, videoSize, rotated);
Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
if (crop != null) {
if (rotated) {
// the crop (provided by the user) is expressed in the natural orientation
crop = flipRect(crop);
}
if (!contentRect.intersect(crop)) {
// intersect() changes contentRect so that it is intersected with crop
Ln.w("Crop rectangle (" + formatCrop(crop) + ") does not intersect device screen (" + formatCrop(deviceSize.toRect()) + ")");
contentRect = new Rect(); // empty
}
}
Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
return new ScreenInfo(contentRect, videoSize, rotated);
}
private static String formatCrop(Rect rect) {
return rect.width() + ":" + rect.height() + ":" + rect.left + ":" + rect.top;
}
@SuppressWarnings("checkstyle:MagicNumber")
private static Size computeVideoSize(Size inputSize, int maxSize) {
private static Size computeVideoSize(int w, int h, int maxSize) {
// Compute the video size and the padding of the content inside this video.
// Principle:
// - scale down the great side of the screen to maxSize (if necessary);
// - scale down the other side so that the aspect ratio is preserved;
// - round this value to the nearest multiple of 8 (H.264 only accepts multiples of 8)
int w = inputSize.getWidth() & ~7; // in case it's not a multiple of 8
int h = inputSize.getHeight() & ~7;
w &= ~7; // in case it's not a multiple of 8
h &= ~7;
if (maxSize > 0) {
if (BuildConfig.DEBUG && maxSize % 8 != 0) {
throw new AssertionError("Max size must be a multiple of 8");
@ -87,10 +105,10 @@ public final class Device {
// the device may have been rotated since the event was generated, so ignore the event
return null;
}
Size deviceSize = screenInfo.getDeviceSize();
Rect contentRect = screenInfo.getContentRect();
Point point = position.getPoint();
int scaledX = point.x * deviceSize.getWidth() / videoSize.getWidth();
int scaledY = point.y * deviceSize.getHeight() / videoSize.getHeight();
int scaledX = contentRect.left + point.x * contentRect.width() / videoSize.getWidth();
int scaledY = contentRect.top + point.y * contentRect.height() / videoSize.getHeight();
return new Point(scaledX, scaledY);
}
@ -113,4 +131,8 @@ public final class Device {
public synchronized void setRotationListener(RotationListener rotationListener) {
this.rotationListener = rotationListener;
}
static Rect flipRect(Rect crop) {
return new Rect(crop.top, crop.left, crop.bottom, crop.right);
}
}

11
server/src/main/java/com/genymobile/scrcpy/Options.java
View file

@ -1,9 +1,12 @@
package com.genymobile.scrcpy;
import android.graphics.Rect;
public class Options {
private int maxSize;
private int bitRate;
private boolean tunnelForward;
private Rect crop;
public int getMaxSize() {
return maxSize;
@ -28,4 +31,12 @@ public class Options {
public void setTunnelForward(boolean tunnelForward) {
this.tunnelForward = tunnelForward;
}
public Rect getCrop() {
return crop;
}
public void setCrop(Rect crop) {
this.crop = crop;
}
}

4
server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java
View file

@ -56,12 +56,12 @@ public class ScreenEncoder implements Device.RotationListener {
do {
MediaCodec codec = createCodec();
IBinder display = createDisplay();
Rect deviceRect = device.getScreenInfo().getDeviceSize().toRect();
Rect contentRect = device.getScreenInfo().getContentRect();
Rect videoRect = device.getScreenInfo().getVideoSize().toRect();
setSize(format, videoRect.width(), videoRect.height());
configure(codec, format);
Surface surface = codec.createInputSurface();
setDisplaySurface(display, surface, deviceRect, videoRect);
setDisplaySurface(display, surface, contentRect, videoRect);
codec.start();
try {
alive = encode(codec, outputStream);

14
server/src/main/java/com/genymobile/scrcpy/ScreenInfo.java
View file

@ -1,18 +1,20 @@
package com.genymobile.scrcpy;
import android.graphics.Rect;
public final class ScreenInfo {
private final Size deviceSize;
private final Rect contentRect; // device size, possibly cropped
private final Size videoSize;
private final boolean rotated;
public ScreenInfo(Size deviceSize, Size videoSize, boolean rotated) {
this.deviceSize = deviceSize;
public ScreenInfo(Rect contentRect, Size videoSize, boolean rotated) {
this.contentRect = contentRect;
this.videoSize = videoSize;
this.rotated = rotated;
}
public Size getDeviceSize() {
return deviceSize;
public Rect getContentRect() {
return contentRect;
}
public Size getVideoSize() {
@ -24,6 +26,6 @@ public final class ScreenInfo {
if (rotated == newRotated) {
return this;
}
return new ScreenInfo(deviceSize.rotate(), videoSize.rotate(), newRotated);
return new ScreenInfo(Device.flipRect(contentRect), videoSize.rotate(), newRotated);
}
}

24
server/src/main/java/com/genymobile/scrcpy/Server.java
View file

@ -1,5 +1,7 @@
package com.genymobile.scrcpy;
import android.graphics.Rect;
import java.io.IOException;
public final class Server {
@ -63,8 +65,30 @@ public final class Server {
boolean tunnelForward = Boolean.parseBoolean(args[2]);
options.setTunnelForward(tunnelForward);
if (args.length < 4) {
return options;
}
Rect crop = parseCrop(args[3]);
options.setCrop(crop);
return options;
}
private static Rect parseCrop(String crop) {
if (crop.isEmpty()) {
return null;
}
// input format: "width:height:x:y"
String[] tokens = crop.split(":");
if (tokens.length != 4) {
throw new IllegalArgumentException("Crop must contains 4 values separated by colons: \"" + crop + "\"");
}
int width = Integer.parseInt(tokens[0]);
int height = Integer.parseInt(tokens[1]);
int x = Integer.parseInt(tokens[2]);
int y = Integer.parseInt(tokens[3]);
return new Rect(x, y, x + width, y + height);
}
public static void main(String... args) throws Exception {
Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {