content: /*
   * Copyright 2022 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 static com.google.android.exoplayer2.util.Assertions.checkNotNull;
  import static com.google.android.exoplayer2.util.Util.SDK_INT;
  
  import android.annotation.SuppressLint;
  import android.content.Context;
  import android.media.MediaFormat;
  import android.util.Pair;
  import android.view.Surface;
  import androidx.annotation.Nullable;
  import com.google.android.exoplayer2.Format;
  import com.google.android.exoplayer2.mediacodec.MediaCodecUtil;
  import com.google.android.exoplayer2.util.MediaFormatUtil;
  import com.google.android.exoplayer2.util.MimeTypes;
  import org.checkerframework.checker.nullness.qual.RequiresNonNull;
  
  /** A default implementation of {@link Codec.DecoderFactory}. */
  /* package */ final class DefaultDecoderFactory implements Codec.DecoderFactory {
  
    private final Context context;
  
    private final boolean decoderSupportsKeyAllowFrameDrop;
  
    public DefaultDecoderFactory(Context context) {
      this.context = context;
  
      decoderSupportsKeyAllowFrameDrop =
          SDK_INT >= 29
              && context.getApplicationContext().getApplicationInfo().targetSdkVersion >= 29;
    }
  
    @Override
    public Codec createForAudioDecoding(Format format) throws TransformationException {
      MediaFormat mediaFormat =
          MediaFormat.createAudioFormat(
              checkNotNull(format.sampleMimeType), format.sampleRate, format.channelCount);
      MediaFormatUtil.maybeSetInteger(
          mediaFormat, MediaFormat.KEY_MAX_INPUT_SIZE, format.maxInputSize);
      MediaFormatUtil.setCsdBuffers(mediaFormat, format.initializationData);
  
      @Nullable
      String mediaCodecName = EncoderUtil.findCodecForFormat(mediaFormat, /* isDecoder= */ true);
      if (mediaCodecName == null) {
        throw createTransformationException(format);
      }
      return new DefaultCodec(
          context,
          format,
          mediaFormat,
          mediaCodecName,
          /* isDecoder= */ true,
          /* outputSurface= */ null);
    }
  
    @SuppressLint("InlinedApi")
    @Override
    public Codec createForVideoDecoding(
        Format format, Surface outputSurface, boolean enableRequestSdrToneMapping)
        throws TransformationException {
      MediaFormat mediaFormat =
          MediaFormat.createVideoFormat(
              checkNotNull(format.sampleMimeType), format.width, format.height);
      MediaFormatUtil.maybeSetInteger(mediaFormat, MediaFormat.KEY_ROTATION, format.rotationDegrees);
      MediaFormatUtil.maybeSetInteger(
          mediaFormat, MediaFormat.KEY_MAX_INPUT_SIZE, format.maxInputSize);
      MediaFormatUtil.setCsdBuffers(mediaFormat, format.initializationData);
      MediaFormatUtil.maybeSetColorInfo(mediaFormat, format.colorInfo);
      if (decoderSupportsKeyAllowFrameDrop) {
        // This key ensures no frame dropping when the decoder's output surface is full. This allows
        // transformer to decode as many frames as possible in one render cycle.
        mediaFormat.setInteger(MediaFormat.KEY_ALLOW_FRAME_DROP, 0);
      }
      if (SDK_INT >= 31 && enableRequestSdrToneMapping) {
        mediaFormat.setInteger(
            MediaFormat.KEY_COLOR_TRANSFER_REQUEST, MediaFormat.COLOR_TRANSFER_SDR_VIDEO);
      }
  
      @Nullable
      Pair<Integer, Integer> codecProfileAndLevel = MediaCodecUtil.getCodecProfileAndLevel(format);
      if (codecProfileAndLevel != null) {
        MediaFormatUtil.maybeSetInteger(
            mediaFormat, MediaFormat.KEY_PROFILE, codecProfileAndLevel.first);
      }
  
      @Nullable
      String mediaCodecName = EncoderUtil.findCodecForFormat(mediaFormat, /* isDecoder= */ true);
      if (mediaCodecName == null) {
        throw createTransformationException(format);
      }
      return new DefaultCodec(
          context, format, mediaFormat, mediaCodecName, /* isDecoder= */ true, outputSurface);
    }
  
    @RequiresNonNull("#1.sampleMimeType")
    private static TransformationException createTransformationException(Format format) {
      return TransformationException.createForCodec(
          new IllegalArgumentException("The requested decoding format is not supported."),
          MimeTypes.isVideo(format.sampleMimeType),
          /* isDecoder= */ true,
          format,
          /* mediaCodecName= */ null,
          TransformationException.ERROR_CODE_DECODING_FORMAT_UNSUPPORTED);
    }
  }
  