Add API to get the version of native decoders

Add API to get the version of underlying libvpx and libopus
decoders. Also update the demo app to show the version in the UI.

demo_misc/vp9_opus_sw/src/main/java/com/google/android/exoplayer/demo/vp9opus/VideoPlayer.java

@@ -73,7 +73,8 @@ public class VideoPlayer extends Activity implements OnClickListener,
   private SurfaceView surfaceView;
   private VpxVideoSurfaceView vpxVideoSurfaceView;
   private TextView debugInfoView;
-  private TextView playerStateView;
+  private String debugInfo;
+  private String playerState;
 
   @Override
   public void onCreate(Bundle savedInstanceState) {
@@ -106,7 +107,10 @@ public class VideoPlayer extends Activity implements OnClickListener,
     surfaceView = (SurfaceView) findViewById(R.id.surface_view);
     vpxVideoSurfaceView = (VpxVideoSurfaceView) findViewById(R.id.vpx_surface_view);
     debugInfoView = (TextView) findViewById(R.id.debug_info);
-    playerStateView = (TextView) findViewById(R.id.player_state);
+    debugInfo = "";
+    playerState = "";
+    filename = "";
+    updateDebugInfoTextView();
 
     // Set the buttons' onclick listeners.
     ((Button) findViewById(R.id.choose_file)).setOnClickListener(this);
@@ -115,7 +119,6 @@ public class VideoPlayer extends Activity implements OnClickListener,
     // In case of DASH, start playback right away.
     if (isDash) {
       findViewById(R.id.buttons).setVisibility(View.GONE);
-      ((TextView) findViewById(R.id.filename)).setVisibility(View.GONE);
       startDashPlayback();
     }
   }
@@ -146,8 +149,7 @@ public class VideoPlayer extends Activity implements OnClickListener,
       case FILE_PICKER_REQUEST:
         if (resultCode == Activity.RESULT_OK) {
           filename = data.getStringExtra(FilePickerActivity.FILENAME_EXTRA_ID);
-          ((TextView) findViewById(R.id.filename)).setText(
-              getString(R.string.current_path, filename));
+          updateDebugInfoTextView();
         }
         break;
     }
@@ -186,7 +188,8 @@ public class VideoPlayer extends Activity implements OnClickListener,
   }
 
   private void startDashPlayback() {
-    playerStateView.setText("Initializing");
+    playerState = "Initializing";
+    updateDebugInfoTextView();
     final String userAgent = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like"
         + " Gecko) Chrome/38.0.2125.104 Safari/537.36";
     DashRendererBuilder rendererBuilder = new DashRendererBuilder(manifestUrl, userAgent, this);
@@ -213,7 +216,8 @@ public class VideoPlayer extends Activity implements OnClickListener,
   @Override
   public void onVideoSizeChanged(int width, int height) {
     videoFrame.setAspectRatio(height == 0 ? 1 : (width * 1.0f) / height);
-    debugInfoView.setText("Video: " + width + " x " + height);
+    debugInfo = "Video: " + width + " x " + height;
+    updateDebugInfoTextView();
   }
 
   @Override
@@ -223,12 +227,12 @@ public class VideoPlayer extends Activity implements OnClickListener,
 
   @Override
   public void onDecoderError(VpxDecoderException e) {
-    debugInfoView.setText("Libvpx decode failure. Giving up.");
+    debugInfo = "Libvpx decode failure. Giving up.";
+    updateDebugInfoTextView();
   }
 
   @Override
   public void onPlayerStateChanged(boolean playWhenReady, int state) {
-    String playerState = "";
     switch (player.getPlaybackState()) {
       case ExoPlayer.STATE_BUFFERING:
         playerState = "buffering";
@@ -246,12 +250,13 @@ public class VideoPlayer extends Activity implements OnClickListener,
         playerState = "ready";
         break;
     }
-    playerStateView.setText("Player State: " + playerState);
+    updateDebugInfoTextView();
   }
 
   @Override
   public void onPlayerError(ExoPlaybackException exception) {
-    debugInfoView.setText("Exoplayer Playback error. Giving up.");
+    debugInfo = "Exoplayer Playback error. Giving up.";
+    updateDebugInfoTextView();
     // TODO: show a retry button here.
   }
 
@@ -282,4 +287,20 @@ public class VideoPlayer extends Activity implements OnClickListener,
     }
   }
 
+  private void updateDebugInfoTextView() {
+    StringBuilder debugInfoText = new StringBuilder();
+    debugInfoText.append(
+        getString(R.string.libvpx_version, LibvpxVideoTrackRenderer.getLibvpxVersion()));
+    debugInfoText.append(" ");
+    debugInfoText.append(
+        getString(R.string.libopus_version, LibopusAudioTrackRenderer.getLibopusVersion()));
+    debugInfoText.append("\n");
+    debugInfoText.append(getString(R.string.current_path, filename));
+    debugInfoText.append(" ");
+    debugInfoText.append(debugInfo);
+    debugInfoText.append(" ");
+    debugInfoText.append(playerState);
+    debugInfoView.setText(debugInfoText.toString());
+  }
+
 }

demo_misc/vp9_opus_sw/src/main/res/layout/activity_video_player.xml

@@ -64,28 +64,10 @@
 
     </LinearLayout>
 
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-      <TextView
-          android:id="@+id/filename"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:paddingRight="10dp"/>
-
-      <TextView
-          android:id="@+id/player_state"
-          android:paddingRight="10dp"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"/>
-
-      <TextView
-          android:id="@+id/debug_info"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"/>
-
-    </LinearLayout>
+    <TextView
+        android:id="@+id/debug_info"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"/>
 
   </LinearLayout>
 

demo_misc/vp9_opus_sw/src/main/res/values/strings.xml

@@ -22,5 +22,11 @@
   <string name="current_path">
     Path: <xliff:g id="path" example="/sdcard/test.webm">%1$s</xliff:g>
   </string>
+  <string name="libvpx_version">
+    Libvpx: <xliff:g id="path">%1$s</xliff:g>
+  </string>
+  <string name="libopus_version">
+    Libopus: <xliff:g id="path">%1$s</xliff:g>
+  </string>
 
 </resources>

extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/LibopusAudioTrackRenderer.java

@@ -119,6 +119,15 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
     formatHolder = new MediaFormatHolder();
   }
 
+  /**
+   * Get the version of underlying libopus library.
+   *
+   * @return version of the underlying libopus library.
+   */
+  public static String getLibopusVersion() {
+    return OpusDecoder.getLibopusVersion();
+  }
+
   @Override
   protected MediaClock getMediaClock() {
     return this;

extensions/opus/src/main/java/com/google/android/exoplayer/ext/opus/OpusDecoder.java

@@ -81,6 +81,11 @@ import java.nio.ByteBuffer;
     opusReset(nativeDecoderContext);
   }
 
+  /**
+   * Returns the version string of the underlying libopus decoder.
+   */
+  public static native String getLibopusVersion();
+
   private native long opusInit(int sampleRate, int channelCount, int numStreams, int numCoupled,
       int gain, byte[] streamMap);
   private native int opusDecode(long decoder, ByteBuffer inputBuffer, int inputSize,

extensions/opus/src/main/jni/opus_jni.cc

@@ -91,6 +91,10 @@ FUNC(void, opusReset, jlong jDecoder) {
   opus_multistream_decoder_ctl(decoder, OPUS_RESET_STATE);
 }
 
+FUNC(jstring, getLibopusVersion) {
+  return env->NewStringUTF(opus_get_version_string());
+}
+
 FUNC(jstring, opusGetErrorMessage, jint errorCode) {
   return env->NewStringUTF(opus_strerror(errorCode));
 }

extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/LibvpxVideoTrackRenderer.java

@@ -150,6 +150,15 @@ public final class LibvpxVideoTrackRenderer extends SampleSourceTrackRenderer {
     formatHolder = new MediaFormatHolder();
   }
 
+  /**
+   * Get the version of underlying libvpx library.
+   *
+   * @return version of the underlying libvpx library.
+   */
+  public static String getLibvpxVersion() {
+    return VpxDecoder.getLibvpxVersion();
+  }
+
   @Override
   protected boolean handlesTrack(MediaFormat mediaFormat) {
     return MimeTypes.VIDEO_VP9.equalsIgnoreCase(mediaFormat.mimeType);

extensions/vp9/src/main/java/com/google/android/exoplayer/ext/vp9/VpxDecoder.java

@@ -69,6 +69,11 @@ import java.nio.ByteBuffer;
     vpxClose(vpxDecContext);
   }
 
+  /**
+   * Returns the version string of the underlying libvpx decoder.
+   */
+  public static native String getLibvpxVersion();
+
   private native long vpxInit();
   private native long vpxClose(long context);
   private native long vpxDecode(long context, ByteBuffer encoded, int length);

extensions/vp9/src/main/jni/vpx_jni.cc

@@ -143,6 +143,10 @@ FUNC(jint, vpxGetFrame, jlong jContext, jobject jOutputBuffer, jboolean isRGB) {
   return 0;
 }
 
+FUNC(jstring, getLibvpxVersion) {
+  return env->NewStringUTF(vpx_codec_version_str());
+}
+
 FUNC(jstring, vpxGetErrorMessage, jlong jContext) {
   vpx_codec_ctx_t* const context = reinterpret_cast<vpx_codec_ctx_t*>(jContext);
   return env->NewStringUTF(vpx_codec_error(context));