content: /*
   * Copyright 2021 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.google.android.exoplayer2.transformer;
  
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
  
  /** Pipeline that passes through the samples without any re-encoding or transformation. */
  /* package */ final class PassthroughSamplePipeline extends BaseSamplePipeline {
  
    private final DecoderInputBuffer buffer;
    private final Format format;
  
    private boolean hasPendingBuffer;
  
    public PassthroughSamplePipeline(
        Format format,
        long streamOffsetUs,
        long streamStartPositionUs,
        TransformationRequest transformationRequest,
        MuxerWrapper muxerWrapper,
        FallbackListener fallbackListener) {
      super(
          format,
          streamOffsetUs,
          streamStartPositionUs,
          transformationRequest.flattenForSlowMotion,
          muxerWrapper);
      this.format = format;
      buffer = new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DIRECT);
      fallbackListener.onTransformationRequestFinalized(transformationRequest);
    }
  
    @Override
    public void release() {}
  
    @Override
    @Nullable
    protected DecoderInputBuffer dequeueInputBufferInternal() {
      return hasPendingBuffer ? null : buffer;
    }
  
    @Override
    protected void queueInputBufferInternal() {
      if (buffer.data != null && buffer.data.hasRemaining()) {
        hasPendingBuffer = true;
      }
    }
  
    @Override
    protected boolean processDataUpToMuxer() {
      return false;
    }
  
    @Override
    protected Format getMuxerInputFormat() {
      return format;
    }
  
    @Override
    @Nullable
    protected DecoderInputBuffer getMuxerInputBuffer() {
      return hasPendingBuffer ? buffer : null;
    }
  
    @Override
    protected void releaseMuxerInputBuffer() {
      buffer.clear();
      hasPendingBuffer = false;
    }
  
    @Override
    protected boolean isMuxerInputEnded() {
      return buffer.isEndOfStream();
    }
  }
  