Allow subclasses to customize the MediaFormat

Make getMediaFormat protected so that subclasses can set additional MediaFormat
keys. For example, if the decoder output needs to be read back via an
ImageReader as YUV data it is necessary to set KEY_COLOR_FORMAT to
COLOR_FormatYUV420Flexible.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=166195211

library/core/src/main/java/com/google/android/exoplayer2/video/MediaCodecVideoRenderer.java

@@ -735,28 +735,6 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer {
     return earlyUs < -30000;
     return earlyUs < -30000;
   }
   }
 
 
-  @SuppressLint("InlinedApi")
-  private static MediaFormat getMediaFormat(Format format, CodecMaxValues codecMaxValues,
-      boolean deviceNeedsAutoFrcWorkaround, int tunnelingAudioSessionId) {
-    MediaFormat frameworkMediaFormat = format.getFrameworkMediaFormatV16();
-    // Set the maximum adaptive video dimensions.
-    frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_WIDTH, codecMaxValues.width);
-    frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_HEIGHT, codecMaxValues.height);
-    // Set the maximum input size.
-    if (codecMaxValues.inputSize != Format.NO_VALUE) {
-      frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_INPUT_SIZE, codecMaxValues.inputSize);
-    }
-    // Set FRC workaround.
-    if (deviceNeedsAutoFrcWorkaround) {
-      frameworkMediaFormat.setInteger("auto-frc", 0);
-    }
-    // Configure tunneling if enabled.
-    if (tunnelingAudioSessionId != C.AUDIO_SESSION_ID_UNSET) {
-      configureTunnelingV21(frameworkMediaFormat, tunnelingAudioSessionId);
-    }
-    return frameworkMediaFormat;
-  }
-
   @TargetApi(23)
   @TargetApi(23)
   private static void setOutputSurfaceV23(MediaCodec codec, Surface surface) {
   private static void setOutputSurfaceV23(MediaCodec codec, Surface surface) {
     codec.setOutputSurface(surface);
     codec.setOutputSurface(surface);
@@ -813,6 +791,40 @@ public class MediaCodecVideoRenderer extends MediaCodecRenderer {
   }
   }
 
 
   /**
   /**
+   * Returns the framework {@link MediaFormat} that should be used to configure the decoder when
+   * playing media in the specified input format.
+   *
+   * @param format The format of input media.
+   * @param codecMaxValues The codec's maximum supported values.
+   * @param deviceNeedsAutoFrcWorkaround Whether the device is known to enable frame-rate conversion
+   *     logic that negatively impacts ExoPlayer.
+   * @param tunnelingAudioSessionId The audio session id to use for tunneling, or
+   *     {@link C#AUDIO_SESSION_ID_UNSET} if tunneling should not be enabled.
+   * @return The framework {@link MediaFormat} that should be used to configure the decoder.
+   */
+  @SuppressLint("InlinedApi")
+  protected MediaFormat getMediaFormat(Format format, CodecMaxValues codecMaxValues,
+      boolean deviceNeedsAutoFrcWorkaround, int tunnelingAudioSessionId) {
+    MediaFormat frameworkMediaFormat = format.getFrameworkMediaFormatV16();
+    // Set the maximum adaptive video dimensions.
+    frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_WIDTH, codecMaxValues.width);
+    frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_HEIGHT, codecMaxValues.height);
+    // Set the maximum input size.
+    if (codecMaxValues.inputSize != Format.NO_VALUE) {
+      frameworkMediaFormat.setInteger(MediaFormat.KEY_MAX_INPUT_SIZE, codecMaxValues.inputSize);
+    }
+    // Set FRC workaround.
+    if (deviceNeedsAutoFrcWorkaround) {
+      frameworkMediaFormat.setInteger("auto-frc", 0);
+    }
+    // Configure tunneling if enabled.
+    if (tunnelingAudioSessionId != C.AUDIO_SESSION_ID_UNSET) {
+      configureTunnelingV21(frameworkMediaFormat, tunnelingAudioSessionId);
+    }
+    return frameworkMediaFormat;
+  }
+
+  /**
    * Returns a maximum video size to use when configuring a codec for {@code format} in a way
    * Returns a maximum video size to use when configuring a codec for {@code format} in a way
    * that will allow possible adaptation to other compatible formats that are expected to have the
    * that will allow possible adaptation to other compatible formats that are expected to have the
    * same aspect ratio, but whose sizes are unknown.
    * same aspect ratio, but whose sizes are unknown.