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Extract conversion from fixed-point u16 to float

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So that it can be reused for other fields.

PR #3369 <https://github.com/Genymobile/scrcpy/pull/3369>
This commit is contained in:
Romain Vimont
2022-07-24 16:00:26 +02:00
parent db8c1ce8e1
commit 72ff957e9a
1 changed files with 7 additions and 4 deletions
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11
server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java
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@@ -139,10 +139,7 @@ public class ControlMessageReader {
int action = toUnsigned(buffer.get()); int action = toUnsigned(buffer.get());
long pointerId = buffer.getLong(); long pointerId = buffer.getLong();
Position position = readPosition(buffer); Position position = readPosition(buffer);
// 16 bits fixed-point float pressure = fixedPointToFloat(buffer.getShort());
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);
int buttons = buffer.getInt(); int buttons = buffer.getInt();
return ControlMessage.createInjectTouchEvent(action, pointerId, position, pressure, buttons); return ControlMessage.createInjectTouchEvent(action, pointerId, position, pressure, buttons);
} }
@@ -210,4 +207,10 @@ public class ControlMessageReader {
private static int toUnsigned(byte value) { private static int toUnsigned(byte value) {
return value & 0xff; return value & 0xff;
} }
private static float fixedPointToFloat(short value) {
int unsignedShort = toUnsigned(value);
// convert 16 bits fixed-point to a float between 0 and 1 (0x1p16f is 2^16 as float)
return unsignedShort == 0xffff ? 1f : (unsignedShort / 0x1p16f);
}
} }