Remove EvdevCaptureProvider components from non-root build

2017-12-01 00:37:25 -08:00
parent 5c69f6716c
commit 3171256c6e
6 changed files with 27 additions and 8 deletions
@@ -0,0 +1,58 @@
+package com.limelight.binding.input.evdev;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+import com.limelight.LimeLog;
+
+public class EvdevReader {
+    private static void readAll(InputStream in, ByteBuffer bb) throws IOException {
+        byte[] buf = bb.array();
+        int ret;
+        int offset = 0;
+
+        while (offset < buf.length) {
+            ret = in.read(buf, offset, buf.length-offset);
+            if (ret <= 0) {
+                throw new IOException("Read failed: "+ret);
+            }
+
+            offset += ret;
+        }
+    }
+
+    // Takes a byte buffer to use to read the output into.
+    // This buffer MUST be in native byte order and at least
+    // EVDEV_MAX_EVENT_SIZE bytes long.
+    public static EvdevEvent read(InputStream input) throws IOException {
+        ByteBuffer bb;
+        int packetLength;
+
+        // Read the packet length
+        bb = ByteBuffer.allocate(4).order(ByteOrder.nativeOrder());
+        readAll(input, bb);
+        packetLength = bb.getInt();
+
+        if (packetLength < EvdevEvent.EVDEV_MIN_EVENT_SIZE) {
+            LimeLog.warning("Short read: "+packetLength);
+            return null;
+        }
+
+        // Read the rest of the packet
+        bb = ByteBuffer.allocate(packetLength).order(ByteOrder.nativeOrder());
+        readAll(input, bb);
+
+        // Throw away the time stamp
+        if (packetLength == EvdevEvent.EVDEV_MAX_EVENT_SIZE) {
+            bb.getLong();
+            bb.getLong();
+        } else {
+            bb.getInt();
+            bb.getInt();
+        }
+
+        return new EvdevEvent(bb.getShort(), bb.getShort(), bb.getInt());
+    }
+}