content: /*
   * Copyright (C) 2017 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.ext.rtmp;
  
  import static com.google.android.exoplayer2.util.Util.castNonNull;
  
  import android.net.Uri;
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.C;
  import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
  import com.google.android.exoplayer2.upstream.BaseDataSource;
  import com.google.android.exoplayer2.upstream.DataSource;
  import com.google.android.exoplayer2.upstream.DataSpec;
  import com.google.android.exoplayer2.upstream.TransferListener;
  import com.google.errorprone.annotations.CanIgnoreReturnValue;
  import io.antmedia.rtmp_client.RtmpClient;
  import io.antmedia.rtmp_client.RtmpClient.RtmpIOException;
  import java.io.IOException;
  
  /** A Real-Time Messaging Protocol (RTMP) {@link DataSource}. */
  public final class RtmpDataSource extends BaseDataSource {
  
    static {
      ExoPlayerLibraryInfo.registerModule("goog.exo.rtmp");
    }
  
    /** {@link DataSource.Factory} for {@link RtmpDataSource} instances. */
    public static final class Factory implements DataSource.Factory {
  
      @Nullable private TransferListener transferListener;
  
      /**
       * Sets the {@link TransferListener} that will be used.
       *
       * <p>The default is {@code null}.
       *
       * <p>See {@link DataSource#addTransferListener(TransferListener)}.
       *
       * @param transferListener The listener that will be used.
       * @return This factory.
       */
      @CanIgnoreReturnValue
      public Factory setTransferListener(@Nullable TransferListener transferListener) {
        this.transferListener = transferListener;
        return this;
      }
  
      @Override
      public RtmpDataSource createDataSource() {
        RtmpDataSource dataSource = new RtmpDataSource();
        if (transferListener != null) {
          dataSource.addTransferListener(transferListener);
        }
        return dataSource;
      }
    }
  
    @Nullable private RtmpClient rtmpClient;
    @Nullable private Uri uri;
  
    public RtmpDataSource() {
      super(/* isNetwork= */ true);
    }
  
    @Override
    public long open(DataSpec dataSpec) throws RtmpIOException {
      transferInitializing(dataSpec);
      rtmpClient = new RtmpClient();
      rtmpClient.open(dataSpec.uri.toString(), false);
  
      this.uri = dataSpec.uri;
      transferStarted(dataSpec);
      return C.LENGTH_UNSET;
    }
  
    @Override
    public int read(byte[] buffer, int offset, int length) throws IOException {
      int bytesRead = castNonNull(rtmpClient).read(buffer, offset, length);
      if (bytesRead == -1) {
        return C.RESULT_END_OF_INPUT;
      }
      bytesTransferred(bytesRead);
      return bytesRead;
    }
  
    @Override
    public void close() {
      if (uri != null) {
        uri = null;
        transferEnded();
      }
      if (rtmpClient != null) {
        rtmpClient.close();
        rtmpClient = null;
      }
    }
  
    @Override
    @Nullable
    public Uri getUri() {
      return uri;
    }
  }
  