Remove workaround for FrameworkSampleSource.

FrameworkSampleSource will still be useful for audio, where
sample interleaving isn't an issue. We could optionally add
a "don't wait for first frame" boolean to the video renderer
if we *really* need to keep some form of this workaround in
place, but I'd rather not do so for now.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119733224

extensions/flac/src/main/java/com/google/android/exoplayer/ext/flac/LibflacAudioTrackRenderer.java

@@ -90,7 +90,6 @@ public final class LibflacAudioTrackRenderer extends SampleSourceTrackRenderer
   private boolean allowPositionDiscontinuity;
   private boolean inputStreamEnded;
   private boolean outputStreamEnded;
-  private boolean sourceIsReady;
 
   private final AudioTrack audioTrack;
   private int audioSessionId;
@@ -131,12 +130,10 @@ public final class LibflacAudioTrackRenderer extends SampleSourceTrackRenderer
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (outputStreamEnded) {
       return;
     }
-    this.sourceIsReady = sourceIsReady;
 
     // Try and read a format if we don't have one already.
     if (format == null && !readFormat()) {
@@ -275,7 +272,7 @@ public final class LibflacAudioTrackRenderer extends SampleSourceTrackRenderer
   @Override
   protected boolean isReady() {
     return audioTrack.hasPendingData()
-        || (format != null && (sourceIsReady || outputBuffer != null));
+        || (format != null && (isSourceReady() || outputBuffer != null));
   }
 
   @Override
@@ -296,7 +293,6 @@ public final class LibflacAudioTrackRenderer extends SampleSourceTrackRenderer
     allowPositionDiscontinuity = true;
     inputStreamEnded = false;
     outputStreamEnded = false;
-    sourceIsReady = false;
     if (decoder != null) {
       flushDecoder();
     }

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

@@ -92,7 +92,6 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
   private boolean allowPositionDiscontinuity;
   private boolean inputStreamEnded;
   private boolean outputStreamEnded;
-  private boolean sourceIsReady;
 
   private int audioSessionId;
 
@@ -139,12 +138,10 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (outputStreamEnded) {
       return;
     }
-    this.sourceIsReady = sourceIsReady;
 
     // Try and read a format if we don't have one already.
     if (format == null && !readFormat()) {
@@ -287,7 +284,7 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
   @Override
   protected boolean isReady() {
     return audioTrack.hasPendingData()
-        || (format != null && (sourceIsReady || outputBuffer != null));
+        || (format != null && (isSourceReady() || outputBuffer != null));
   }
 
   @Override
@@ -308,7 +305,6 @@ public final class LibopusAudioTrackRenderer extends SampleSourceTrackRenderer
     allowPositionDiscontinuity = true;
     inputStreamEnded = false;
     outputStreamEnded = false;
-    sourceIsReady = false;
     if (decoder != null) {
       flushDecoder();
     }

library/src/main/java/com/google/android/exoplayer/MediaCodecTrackRenderer.java

@@ -137,23 +137,6 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
   }
 
   /**
-   * Value returned by {@link #getSourceState()} when the source is not ready.
-   */
-  protected static final int SOURCE_STATE_NOT_READY = 0;
-  /**
-   * Value returned by {@link #getSourceState()} when the source is ready and we're able to read
-   * from it.
-   */
-  protected static final int SOURCE_STATE_READY = 1;
-  /**
-   * Value returned by {@link #getSourceState()} when the source is ready but we might not be able
-   * to read from it. We transition to this state when an attempt to read a sample fails despite the
-   * source reporting that samples are available. This can occur when the next sample to be provided
-   * by the source is for another renderer.
-   */
-  protected static final int SOURCE_STATE_READY_READ_MAY_FAIL = 2;
-
-  /**
    * If the {@link MediaCodec} is hotswapped (i.e. replaced during playback), this is the period of
    * time during which {@link #isReady()} will report true regardless of whether the new codec has
    * output frames that are ready to be rendered.
@@ -227,7 +210,6 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
   private boolean codecReceivedBuffers;
   private boolean codecReceivedEos;
 
-  private int sourceState;
   private boolean inputStreamEnded;
   private boolean outputStreamEnded;
   private boolean waitingForKeys;
@@ -462,7 +444,6 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
 
   @Override
   protected void reset(long positionUs) throws ExoPlaybackException {
-    sourceState = SOURCE_STATE_NOT_READY;
     inputStreamEnded = false;
     outputStreamEnded = false;
     if (codec != null) {
@@ -481,11 +462,7 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
-    sourceState = sourceIsReady
-        ? (sourceState == SOURCE_STATE_NOT_READY ? SOURCE_STATE_READY : sourceState)
-        : SOURCE_STATE_NOT_READY;
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (format == null) {
       readFormat();
     }
@@ -493,9 +470,7 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
     if (codec != null) {
       TraceUtil.beginSection("drainAndFeed");
       while (drainOutputBuffer(positionUs, elapsedRealtimeUs)) {}
-      if (feedInputBuffer(true)) {
-        while (feedInputBuffer(false)) {}
-      }
+      while (feedInputBuffer()) {}
       TraceUtil.endSection();
     }
     codecCounters.ensureUpdated();
@@ -536,12 +511,10 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
   }
 
   /**
-   * @param firstFeed True if this is the first call to this method from the current invocation of
-   *     {@link #render(long, long)}. False otherwise.
    * @return True if it may be possible to feed more input data. False otherwise.
    * @throws ExoPlaybackException If an error occurs feeding the input buffer.
    */
-  private boolean feedInputBuffer(boolean firstFeed) throws ExoPlaybackException {
+  private boolean feedInputBuffer() throws ExoPlaybackException {
     if (inputStreamEnded
         || codecReinitializationState == REINITIALIZATION_STATE_WAIT_END_OF_STREAM) {
       // The input stream has ended, or we need to re-initialize the codec but are still waiting
@@ -587,9 +560,6 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
         codecReconfigurationState = RECONFIGURATION_STATE_QUEUE_PENDING;
       }
       result = readSource(formatHolder, buffer);
-      if (firstFeed && sourceState == SOURCE_STATE_READY && result == TrackStream.NOTHING_READ) {
-        sourceState = SOURCE_STATE_READY_READ_MAY_FAIL;
-      }
     }
 
     if (result == TrackStream.NOTHING_READ) {
@@ -807,17 +777,7 @@ public abstract class MediaCodecTrackRenderer extends SampleSourceTrackRenderer
   @Override
   protected boolean isReady() {
     return format != null && !waitingForKeys
-        && (sourceState != SOURCE_STATE_NOT_READY || outputIndex >= 0 || isWithinHotswapPeriod());
-  }
-
-  /**
-   * Gets the source state.
-   *
-   * @return One of {@link #SOURCE_STATE_NOT_READY}, {@link #SOURCE_STATE_READY} and
-   *     {@link #SOURCE_STATE_READY_READ_MAY_FAIL}.
-   */
-  protected final int getSourceState() {
-    return sourceState;
+        && (isSourceReady() || outputIndex >= 0 || isWithinHotswapPeriod());
   }
 
   private boolean isWithinHotswapPeriod() {

library/src/main/java/com/google/android/exoplayer/MediaCodecVideoTrackRenderer.java

@@ -293,8 +293,7 @@ public class MediaCodecVideoTrackRenderer extends MediaCodecTrackRenderer {
 
   @Override
   protected boolean isReady() {
-    if (super.isReady()
-        && (renderedFirstFrame || getSourceState() == SOURCE_STATE_READY_READ_MAY_FAIL)) {
+    if (renderedFirstFrame && super.isReady()) {
       // Ready. If we were joining then we've now joined, so clear the joining deadline.
       joiningDeadlineUs = -1;
       return true;

library/src/main/java/com/google/android/exoplayer/SampleSourceTrackRenderer.java

@@ -44,12 +44,6 @@ public abstract class SampleSourceTrackRenderer extends TrackRenderer {
   }
 
   @Override
-  protected final void render(long positionUs, long elapsedRealtimeUs)
-      throws ExoPlaybackException {
-    render(positionUs, elapsedRealtimeUs, trackStream.isReady());
-  }
-
-  @Override
   protected final void maybeThrowError() throws IOException {
     trackStream.maybeThrowError();
   }
@@ -70,6 +64,15 @@ public abstract class SampleSourceTrackRenderer extends TrackRenderer {
     return trackStream.readData(formatHolder, buffer);
   }
 
+  /**
+   * Returns whether the upstream source is ready.
+   *
+   * @return True if the source is ready. False otherwise.
+   */
+  protected final boolean isSourceReady() {
+    return trackStream.isReady();
+  }
+
   // Abstract methods.
 
   /**
@@ -80,17 +83,4 @@ public abstract class SampleSourceTrackRenderer extends TrackRenderer {
    */
   protected abstract void reset(long positionUs) throws ExoPlaybackException;
 
-  /**
-   * Called by {@link #render(long, long)}.
-   *
-   * @param positionUs The current media time in microseconds, measured at the start of the
-   *     current iteration of the rendering loop.
-   * @param elapsedRealtimeUs {@link android.os.SystemClock#elapsedRealtime()} in microseconds,
-   *     measured at the start of the current iteration of the rendering loop.
-   * @param sourceIsReady The result of the most recent call to  {@link TrackStream#isReady()}.
-   * @throws ExoPlaybackException If an error occurs.
-   */
-  protected abstract void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException;
-
 }

library/src/main/java/com/google/android/exoplayer/metadata/MetadataTrackRenderer.java

@@ -98,8 +98,7 @@ public final class MetadataTrackRenderer<T> extends SampleSourceTrackRenderer im
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (!inputStreamEnded && pendingMetadata == null) {
       buffer.clear();
       int result = readSource(formatHolder, buffer);

library/src/main/java/com/google/android/exoplayer/text/TextTrackRenderer.java

@@ -126,8 +126,7 @@ public final class TextTrackRenderer extends SampleSourceTrackRenderer implement
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (outputStreamEnded) {
       return;
     }

library/src/main/java/com/google/android/exoplayer/text/eia608/Eia608TrackRenderer.java

@@ -104,8 +104,7 @@ public final class Eia608TrackRenderer extends SampleSourceTrackRenderer impleme
   }
 
   @Override
-  protected void render(long positionUs, long elapsedRealtimeUs, boolean sourceIsReady)
-      throws ExoPlaybackException {
+  protected void render(long positionUs, long elapsedRealtimeUs) throws ExoPlaybackException {
     if (isBufferPending()) {
       maybeParsePendingBuffer(positionUs);
     }