add test files for SSA.

library/src/androidTest/assets/mkv/ssasample.mkv.3.dump

+seekMap:
+  isSeekable = true
+  duration = 1449923000
+  getPosition(0) = 12068
+numberOfTracks = 3
+track 1:
+  format:
+    bitrate = -1
+    id = 1
+    containerMimeType = null
+    sampleMimeType = video/avc
+    maxInputSize = -1
+    width = 848
+    height = 480
+    frameRate = -1.0
+    rotationDegrees = -1
+    pixelWidthHeightRatio = 1.0058962
+    channelCount = -1
+    sampleRate = -1
+    pcmEncoding = -1
+    encoderDelay = -1
+    encoderPadding = -1
+    subsampleOffsetUs = 9223372036854775807
+    selectionFlags = 0
+    language = null
+    drmInitData = -
+    initializationData:
+      data = length 33, hash D89E426D
+      data = length 10, hash 7A0D0F2B
+  sample count = 0
+track 2:
+  format:
+    bitrate = -1
+    id = 2
+    containerMimeType = null
+    sampleMimeType = audio/vorbis
+    maxInputSize = 8192
+    width = -1
+    height = -1
+    frameRate = -1.0
+    rotationDegrees = -1
+    pixelWidthHeightRatio = -1.0
+    channelCount = 2
+    sampleRate = 44100
+    pcmEncoding = -1
+    encoderDelay = -1
+    encoderPadding = -1
+    subsampleOffsetUs = 9223372036854775807
+    selectionFlags = 1
+    language = jpn
+    drmInitData = -
+    initializationData:
+      data = length 30, hash 604D0FB4
+      data = length 3832, hash 400807EA
+  sample count = 0
+track 3:
+  format:
+    bitrate = -1
+    id = 3
+    containerMimeType = null
+    sampleMimeType = text/x-ssa
+    maxInputSize = -1
+    width = -1
+    height = -1
+    frameRate = -1.0
+    rotationDegrees = -1
+    pixelWidthHeightRatio = -1.0
+    channelCount = -1
+    sampleRate = -1
+    pcmEncoding = -1
+    encoderDelay = -1
+    encoderPadding = -1
+    subsampleOffsetUs = 9223372036854775807
+    selectionFlags = 1
+    language = eng
+    drmInitData = -
+    initializationData:
+  sample count = 1
+  sample 0:
+    time = 1447083000
+    flags = 1
+    data = length 108, hash 6EE53EC5
+tracksEnded = true

library/src/androidTest/java/com/google/android/exoplayer2/extractor/mkv/MatroskaExtractorTest.java

@@ -32,7 +32,16 @@ public final class MatroskaExtractorTest extends InstrumentationTestCase {
       }
     }, "mkv/sample.mkv", getInstrumentation());
   }
-
+/*
+  public void testMkvSSASample() throws Exception {
+    TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
+      @Override
+      public Extractor create() {
+        return new MatroskaExtractor();
+      }
+    }, "mkv/ssasample.mkv", getInstrumentation());
+  }
+*/
   public void testWebmSubsampleEncryption() throws Exception {
     TestUtil.assertOutput(new TestUtil.ExtractorFactory() {
       @Override

library/src/androidTest/java/com/google/android/exoplayer2/text/ssa/SSATests.java

+package com.google.android.exoplayer2.text.ssa;
+
+import android.test.InstrumentationTestCase;
+
+import com.google.android.exoplayer2.testutil.TestUtil;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+
+/**
+ * Created by cablej01 on 26/12/2016.
+ */
+
+public class SSATests extends InstrumentationTestCase {
+    private static final String TYPICAL_FILE = "ssa/typical";
+    private static SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss.SSS");
+
+    public void testDecodeTypical() throws IOException {
+        SSADecoder decoder = new SSADecoder();
+        byte[] bytes = TestUtil.getByteArray(getInstrumentation(), TYPICAL_FILE);
+        SSASubtitle subtitle = decoder.decode(bytes, bytes.length);
+        int n = subtitle.getEventTimeCount();
+        assertEquals(462, n);
+        assertTypicalCue1(subtitle, 0);
+        assertTypicalCue2(subtitle, 2);
+        assertTypicalCue3(subtitle, 4);
+    }
+
+    /*
+    Dialogue: 0,0:00:04.23,0:00:06.90,Watamote-internal/narrator,Serinuma,0000,0000,0000,,The prince should be with the princess.
+    Dialogue: 0,0:00:09.61,0:00:13.20,Watamote-internal/narrator,Serinuma,0000,0000,0000,,Who was the one who decided that?
+    Dialogue: 0,0:00:33.01,0:00:41.77,Watamote-Title,,0000,0000,0000,,{\fad(3562,1)}Kiss Him, Not Me
+    Dialogue: 0,0:01:48.87,0:01:54.38,Watamote-Ep_Title,,0000,0000,0000,,Can She Do It? A Real Life Oto
+    */
+
+    private static void assertTypicalCue1(SSASubtitle subtitle, int eventIndex) {
+        assertEquals("00:00:04.230", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex))));
+        assertEquals("The prince should be with the princess.",
+                subtitle.getCues(subtitle.getEventTime(eventIndex)).get(0).text.toString());
+        assertEquals("00:00:09.610", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex+1))));
+    }
+    private static void assertTypicalCue2(SSASubtitle subtitle, int eventIndex) {
+        assertEquals("00:00:33.010", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex))));
+        assertEquals("Kiss Him, Not Me",
+                subtitle.getCues(subtitle.getEventTime(eventIndex)).get(0).text.toString());
+        assertEquals("00:01:48.870", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex+1))));
+    }
+
+    private static void assertTypicalCue3(SSASubtitle subtitle, int eventIndex) {
+        String s1 = sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex)));
+        String s2 = sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex+1)));
+        String s3 =
+                subtitle.getCues(subtitle.getEventTime(eventIndex)).get(0).text.toString();
+        assertEquals("00:01:59.610", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex))));
+        assertEquals("Nice one, Igarashi!",
+                subtitle.getCues(subtitle.getEventTime(eventIndex)).get(0).text.toString());
+        assertEquals("00:02:01.220", sdf.format(new java.util.Date(subtitle.getEventTime(eventIndex+1))));
+    }
+
+}