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Add "inject touch" control message

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Add a control message type in the protocol to forward touch events to
the device.
This commit is contained in:
Romain Vimont 2019-09-15 16:16:17 +02:00
parent d90549d1e6
commit 77f876e29c
6 changed files with 140 additions and 7 deletions
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19
app/src/control_msg.c
View file

@ -1,6 +1,7 @@
#include "control_msg.h"
#include <string.h>
#include <SDL2/SDL_assert.h>
#include "config.h"
#include "buffer_util.h"
@ -24,6 +25,16 @@ write_string(const char *utf8, size_t max_len, unsigned char *buf) {
return 2 + len;
}
static uint16_t
to_fixed_point_16(float f) {
SDL_assert(f >= 0.0f && f <= 1.0f);
uint32_t u = f * 0x1p16f; // 2^16
if (u >= 0xffff) {
u = 0xffff;
}
return (uint16_t) u;
}
size_t
control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
buf[0] = msg->type;
@ -43,6 +54,14 @@ control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
buffer_write32be(&buf[2], msg->inject_mouse_event.buttons);
write_position(&buf[6], &msg->inject_mouse_event.position);
return 18;
case CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT:
buf[1] = msg->inject_touch_event.action;
buffer_write64be(&buf[2], msg->inject_touch_event.pointer_id);
write_position(&buf[10], &msg->inject_touch_event.position);
uint16_t pressure =
to_fixed_point_16(msg->inject_touch_event.pressure);
buffer_write16be(&buf[22], pressure);
return 24;
case CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
write_position(&buf[1], &msg->inject_scroll_event.position);
buffer_write32be(&buf[13],

7
app/src/control_msg.h
View file

@ -19,6 +19,7 @@ enum control_msg_type {
CONTROL_MSG_TYPE_INJECT_KEYCODE,
CONTROL_MSG_TYPE_INJECT_TEXT,
CONTROL_MSG_TYPE_INJECT_MOUSE_EVENT,
CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT,
CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT,
CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON,
CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL,
@ -50,6 +51,12 @@ struct control_msg {
enum android_motionevent_buttons buttons;
struct position position;
} inject_mouse_event;
struct {
enum android_motionevent_action action;
uint64_t pointer_id;
struct position position;
float pressure;
} inject_touch_event;
struct {
struct position position;
int32_t hscroll;

36
app/tests/test_control_msg_serialize.c
View file

@ -100,6 +100,41 @@ static void test_serialize_inject_mouse_event(void) {
assert(!memcmp(buf, expected, sizeof(expected)));
}
static void test_serialize_inject_touch_event(void) {
struct control_msg msg = {
.type = CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT,
.inject_touch_event = {
.action = AMOTION_EVENT_ACTION_DOWN,
.pointer_id = 0x1234567887654321L,
.position = {
.point = {
.x = 100,
.y = 200,
},
.screen_size = {
.width = 1080,
.height = 1920,
},
},
.pressure = 1.0f,
},
};
unsigned char buf[CONTROL_MSG_SERIALIZED_MAX_SIZE];
int size = control_msg_serialize(&msg, buf);
assert(size == 24);
const unsigned char expected[] = {
CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT,
0x00, // AKEY_EVENT_ACTION_DOWN
0x12, 0x34, 0x56, 0x78, 0x87, 0x65, 0x43, 0x21, // pointer id
0x00, 0x00, 0x00, 0x64, 0x00, 0x00, 0x00, 0xc8, // 100 200
0x04, 0x38, 0x07, 0x80, // 1080 1920
0xff, 0xff, // pressure
};
assert(!memcmp(buf, expected, sizeof(expected)));
}
static void test_serialize_inject_scroll_event(void) {
struct control_msg msg = {
.type = CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT,
@ -237,6 +272,7 @@ int main(void) {
test_serialize_inject_text();
test_serialize_inject_text_long();
test_serialize_inject_mouse_event();
test_serialize_inject_touch_event();
test_serialize_inject_scroll_event();
test_serialize_back_or_screen_on();
test_serialize_expand_notification_panel();

35
server/src/main/java/com/genymobile/scrcpy/ControlMessage.java
View file

@ -8,13 +8,14 @@ public final class ControlMessage {
public static final int TYPE_INJECT_KEYCODE = 0;
public static final int TYPE_INJECT_TEXT = 1;
public static final int TYPE_INJECT_MOUSE_EVENT = 2;
public static final int TYPE_INJECT_SCROLL_EVENT = 3;
public static final int TYPE_BACK_OR_SCREEN_ON = 4;
public static final int TYPE_EXPAND_NOTIFICATION_PANEL = 5;
public static final int TYPE_COLLAPSE_NOTIFICATION_PANEL = 6;
public static final int TYPE_GET_CLIPBOARD = 7;
public static final int TYPE_SET_CLIPBOARD = 8;
public static final int TYPE_SET_SCREEN_POWER_MODE = 9;
public static final int TYPE_INJECT_TOUCH_EVENT = 3;
public static final int TYPE_INJECT_SCROLL_EVENT = 4;
public static final int TYPE_BACK_OR_SCREEN_ON = 5;
public static final int TYPE_EXPAND_NOTIFICATION_PANEL = 6;
public static final int TYPE_COLLAPSE_NOTIFICATION_PANEL = 7;
public static final int TYPE_GET_CLIPBOARD = 8;
public static final int TYPE_SET_CLIPBOARD = 9;
public static final int TYPE_SET_SCREEN_POWER_MODE = 10;
private int type;
private String text;
@ -22,6 +23,8 @@ public final class ControlMessage {
private int action; // KeyEvent.ACTION_* or MotionEvent.ACTION_* or POWER_MODE_*
private int keycode; // KeyEvent.KEYCODE_*
private int buttons; // MotionEvent.BUTTON_*
private long pointerId;
private float pressure;
private Position position;
private int hScroll;
private int vScroll;
@ -54,6 +57,16 @@ public final class ControlMessage {
return msg;
}
public static ControlMessage createInjectTouchEvent(int action, long pointerId, Position position, float pressure) {
ControlMessage msg = new ControlMessage();
msg.type = TYPE_INJECT_TOUCH_EVENT;
msg.action = action;
msg.pointerId = pointerId;
msg.pressure = pressure;
msg.position = position;
return msg;
}
public static ControlMessage createInjectScrollEvent(Position position, int hScroll, int vScroll) {
ControlMessage msg = new ControlMessage();
msg.type = TYPE_INJECT_SCROLL_EVENT;
@ -110,6 +123,14 @@ public final class ControlMessage {
return buttons;
}
public long getPointerId() {
return pointerId;
}
public float getPressure() {
return pressure;
}
public Position getPosition() {
return position;
}

19
server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java
View file

@ -10,6 +10,7 @@ public class ControlMessageReader {
private static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 9;
private static final int INJECT_MOUSE_EVENT_PAYLOAD_LENGTH = 17;
private static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 21;
private static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
private static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;
@ -62,6 +63,9 @@ public class ControlMessageReader {
case ControlMessage.TYPE_INJECT_MOUSE_EVENT:
msg = parseInjectMouseEvent();
break;
case ControlMessage.TYPE_INJECT_TOUCH_EVENT:
msg = parseInjectTouchEvent();
break;
case ControlMessage.TYPE_INJECT_SCROLL_EVENT:
msg = parseInjectScrollEvent();
break;
@ -130,6 +134,21 @@ public class ControlMessageReader {
return ControlMessage.createInjectMouseEvent(action, buttons, position);
}
@SuppressWarnings("checkstyle:MagicNumber")
private ControlMessage parseInjectTouchEvent() {
if (buffer.remaining() < INJECT_TOUCH_EVENT_PAYLOAD_LENGTH) {
return null;
}
int action = toUnsigned(buffer.get());
long pointerId = buffer.getLong();
Position position = readPosition(buffer);
// 16 bits fixed-point
int pressureInt = toUnsigned(buffer.getShort());
// convert it to a float between 0 and 1 (0x1p16f is 2^16 as float)
float pressure = pressureInt == 0xffff ? 1f : (pressureInt / 0x1p16f);
return ControlMessage.createInjectTouchEvent(action, pointerId, position, pressure);
}
private ControlMessage parseInjectScrollEvent() {
if (buffer.remaining() < INJECT_SCROLL_EVENT_PAYLOAD_LENGTH) {
return null;

31
server/src/test/java/com/genymobile/scrcpy/ControlMessageReaderTest.java
View file

@ -105,6 +105,37 @@ public class ControlMessageReaderTest {
Assert.assertEquals(1920, event.getPosition().getScreenSize().getHeight());
}
@Test
@SuppressWarnings("checkstyle:MagicNumber")
public void testParseTouchEvent() throws IOException {
ControlMessageReader reader = new ControlMessageReader();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream dos = new DataOutputStream(bos);
dos.writeByte(ControlMessage.TYPE_INJECT_TOUCH_EVENT);
dos.writeByte(MotionEvent.ACTION_DOWN);
dos.writeLong(-42); // pointerId
dos.writeInt(100);
dos.writeInt(200);
dos.writeShort(1080);
dos.writeShort(1920);
dos.writeShort(0xffff); // pressure
byte[] packet = bos.toByteArray();
reader.readFrom(new ByteArrayInputStream(packet));
ControlMessage event = reader.next();
Assert.assertEquals(ControlMessage.TYPE_INJECT_TOUCH_EVENT, event.getType());
Assert.assertEquals(MotionEvent.ACTION_DOWN, event.getAction());
Assert.assertEquals(-42, event.getPointerId());
Assert.assertEquals(100, event.getPosition().getPoint().getX());
Assert.assertEquals(200, event.getPosition().getPoint().getY());
Assert.assertEquals(1080, event.getPosition().getScreenSize().getWidth());
Assert.assertEquals(1920, event.getPosition().getScreenSize().getHeight());
Assert.assertEquals(1f, event.getPressure(), 0f); // must be exact
}
@Test
@SuppressWarnings("checkstyle:MagicNumber")
public void testParseScrollEvent() throws IOException {