Add --codec-options

Add a command-line parameter to pass custom options to the device
encoder (as a comma-separated list of "key[:type]=value").

The list of possible codec options is available in the Android
documentation:
<https://d.android.com/reference/android/media/MediaFormat>

PR #1325 <https://github.com/Genymobile/scrcpy/pull/1325>
Refs #1226 <https://github.com/Genymobile/scrcpy/pull/1226>

Co-authored-by: Romain Vimont <rom@rom1v.com>

server/src/test/java/com/genymobile/scrcpy/CodecOptionsTest.java

@@ -0,0 +1,114 @@
+package com.genymobile.scrcpy;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.List;
+
+public class CodecOptionsTest {
+
+    @Test
+    public void testIntegerImplicit() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key=5");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertEquals(5, option.getValue());
+    }
+
+    @Test
+    public void testInteger() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key:int=5");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Integer);
+        Assert.assertEquals(5, option.getValue());
+    }
+
+    @Test
+    public void testLong() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key:long=5");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Long);
+        Assert.assertEquals(5L, option.getValue());
+    }
+
+    @Test
+    public void testFloat() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key:float=4.5");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Float);
+        Assert.assertEquals(4.5f, option.getValue());
+    }
+
+    @Test
+    public void testString() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key:string=some_value");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof String);
+        Assert.assertEquals("some_value", option.getValue());
+    }
+
+    @Test
+    public void testStringEscaped() {
+        List<CodecOption> codecOptions = CodecOption.parse("some_key:string=warning\\,this_is_not=a_new_key");
+
+        Assert.assertEquals(1, codecOptions.size());
+
+        CodecOption option = codecOptions.get(0);
+        Assert.assertEquals("some_key", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof String);
+        Assert.assertEquals("warning,this_is_not=a_new_key", option.getValue());
+    }
+
+    @Test
+    public void testList() {
+        List<CodecOption> codecOptions = CodecOption.parse("a=1,b:int=2,c:long=3,d:float=4.5,e:string=a\\,b=c");
+
+        Assert.assertEquals(5, codecOptions.size());
+
+        CodecOption option;
+
+        option = codecOptions.get(0);
+        Assert.assertEquals("a", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Integer);
+        Assert.assertEquals(1, option.getValue());
+
+        option = codecOptions.get(1);
+        Assert.assertEquals("b", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Integer);
+        Assert.assertEquals(2, option.getValue());
+
+        option = codecOptions.get(2);
+        Assert.assertEquals("c", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Long);
+        Assert.assertEquals(3L, option.getValue());
+
+        option = codecOptions.get(3);
+        Assert.assertEquals("d", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof Float);
+        Assert.assertEquals(4.5f, option.getValue());
+
+        option = codecOptions.get(4);
+        Assert.assertEquals("e", option.getKey());
+        Assert.assertTrue(option.getValue() instanceof String);
+        Assert.assertEquals("a,b=c", option.getValue());
+    }
+}