Rename MediaCodecAdapterWrapper to Codec.

Move static factories into a separate class and make it implement an interface
that will let tests customize encoder/decoder creation.

PiperOrigin-RevId: 417610825

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/AudioSamplePipeline.java

@@ -44,8 +44,9 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
   private final Format inputFormat;
   private final Transformation transformation;
+  private final Codec.EncoderFactory encoderFactory;
 
-  private final MediaCodecAdapterWrapper decoder;
+  private final Codec decoder;
   private final DecoderInputBuffer decoderInputBuffer;
 
   private final SonicAudioProcessor sonicAudioProcessor;
@@ -55,7 +56,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private final DecoderInputBuffer encoderOutputBuffer;
 
   private @MonotonicNonNull AudioFormat encoderInputAudioFormat;
-  private @MonotonicNonNull MediaCodecAdapterWrapper encoder;
+  private @MonotonicNonNull Codec encoder;
   private long nextEncoderInputBufferTimeUs;
   private long encoderBufferDurationRemainder;
 
@@ -63,10 +64,15 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private boolean drainingSonicForSpeedChange;
   private float currentSpeed;
 
-  public AudioSamplePipeline(Format inputFormat, Transformation transformation)
+  public AudioSamplePipeline(
+      Format inputFormat,
+      Transformation transformation,
+      Codec.EncoderFactory encoderFactory,
+      Codec.DecoderFactory decoderFactory)
       throws TransformationException {
     this.inputFormat = inputFormat;
     this.transformation = transformation;
+    this.encoderFactory = encoderFactory;
     decoderInputBuffer =
         new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
     encoderInputBuffer =
@@ -77,7 +83,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     sonicOutputBuffer = AudioProcessor.EMPTY_BUFFER;
     speedProvider = new SegmentSpeedProvider(inputFormat);
     currentSpeed = speedProvider.getSpeed(0);
-    this.decoder = MediaCodecAdapterWrapper.createForAudioDecoding(inputFormat);
+    this.decoder = decoderFactory.createForAudioDecoding(inputFormat);
   }
 
   @Override
@@ -301,7 +307,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       }
     }
     encoder =
-        MediaCodecAdapterWrapper.createForAudioEncoding(
+        encoderFactory.createForAudioEncoding(
             new Format.Builder()
                 .setSampleMimeType(
                     transformation.audioMimeType == null

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/DefaultCodecFactory.java

+/*
+ * 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 static com.google.android.exoplayer2.util.Assertions.checkArgument;
+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.media.MediaCodec;
+import android.media.MediaCodecInfo.CodecCapabilities;
+import android.media.MediaFormat;
+import android.view.Surface;
+import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.mediacodec.MediaCodecAdapter;
+import com.google.android.exoplayer2.mediacodec.MediaCodecInfo;
+import com.google.android.exoplayer2.mediacodec.SynchronousMediaCodecAdapter;
+import com.google.android.exoplayer2.util.MediaFormatUtil;
+import java.io.IOException;
+
+/** A default {@link Codec.DecoderFactory} and {@link Codec.EncoderFactory}. */
+/* package */ final class DefaultCodecFactory
+    implements Codec.DecoderFactory, Codec.EncoderFactory {
+
+  @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);
+
+    MediaCodecAdapter adapter;
+    try {
+      adapter =
+          new MediaCodecFactory()
+              .createAdapter(
+                  MediaCodecAdapter.Configuration.createForAudioDecoding(
+                      createPlaceholderMediaCodecInfo(), mediaFormat, format, /* crypto= */ null));
+    } catch (Exception e) {
+      throw createTransformationException(e, format, /* isVideo= */ false, /* isDecoder= */ true);
+    }
+    return new Codec(adapter);
+  }
+
+  @Override
+  @SuppressLint("InlinedApi")
+  public Codec createForVideoDecoding(Format format, Surface surface)
+      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);
+    if (SDK_INT >= 29) {
+      // On API levels over 29, Transformer decodes as many frames as possible in one render
+      // cycle. This key ensures no frame dropping when the decoder's output surface is full.
+      mediaFormat.setInteger(MediaFormat.KEY_ALLOW_FRAME_DROP, 0);
+    }
+
+    MediaCodecAdapter adapter;
+    try {
+      adapter =
+          new MediaCodecFactory()
+              .createAdapter(
+                  MediaCodecAdapter.Configuration.createForVideoDecoding(
+                      createPlaceholderMediaCodecInfo(),
+                      mediaFormat,
+                      format,
+                      surface,
+                      /* crypto= */ null));
+    } catch (Exception e) {
+      throw createTransformationException(e, format, /* isVideo= */ true, /* isDecoder= */ true);
+    }
+    return new Codec(adapter);
+  }
+
+  @Override
+  public Codec createForAudioEncoding(Format format) throws TransformationException {
+    MediaFormat mediaFormat =
+        MediaFormat.createAudioFormat(
+            checkNotNull(format.sampleMimeType), format.sampleRate, format.channelCount);
+    mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, format.bitrate);
+
+    MediaCodecAdapter adapter;
+    try {
+      adapter =
+          new MediaCodecFactory()
+              .createAdapter(
+                  MediaCodecAdapter.Configuration.createForAudioEncoding(
+                      createPlaceholderMediaCodecInfo(), mediaFormat, format));
+    } catch (Exception e) {
+      throw createTransformationException(e, format, /* isVideo= */ false, /* isDecoder= */ false);
+    }
+    return new Codec(adapter);
+  }
+
+  @Override
+  public Codec createForVideoEncoding(Format format) throws TransformationException {
+    checkArgument(format.width != Format.NO_VALUE);
+    checkArgument(format.height != Format.NO_VALUE);
+    // According to interface Javadoc, format.rotationDegrees should be 0. The video should always
+    // be in landscape orientation.
+    checkArgument(format.height < format.width);
+    checkArgument(format.rotationDegrees == 0);
+
+    MediaFormat mediaFormat =
+        MediaFormat.createVideoFormat(
+            checkNotNull(format.sampleMimeType), format.width, format.height);
+    mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, CodecCapabilities.COLOR_FormatSurface);
+    mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 30);
+    mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
+    mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 413_000);
+
+    MediaCodecAdapter adapter;
+    try {
+      adapter =
+          new MediaCodecFactory()
+              .createAdapter(
+                  MediaCodecAdapter.Configuration.createForVideoEncoding(
+                      createPlaceholderMediaCodecInfo(), mediaFormat, format));
+    } catch (Exception e) {
+      throw createTransformationException(e, format, /* isVideo= */ true, /* isDecoder= */ false);
+    }
+    return new Codec(adapter);
+  }
+
+  private static final class MediaCodecFactory extends SynchronousMediaCodecAdapter.Factory {
+    @Override
+    protected MediaCodec createCodec(MediaCodecAdapter.Configuration configuration)
+        throws IOException {
+      String sampleMimeType =
+          checkNotNull(configuration.mediaFormat.getString(MediaFormat.KEY_MIME));
+      boolean isDecoder = (configuration.flags & MediaCodec.CONFIGURE_FLAG_ENCODE) == 0;
+      return isDecoder
+          ? MediaCodec.createDecoderByType(checkNotNull(sampleMimeType))
+          : MediaCodec.createEncoderByType(checkNotNull(sampleMimeType));
+    }
+  }
+
+  private static MediaCodecInfo createPlaceholderMediaCodecInfo() {
+    return MediaCodecInfo.newInstance(
+        /* name= */ "name-placeholder",
+        /* mimeType= */ "mime-type-placeholder",
+        /* codecMimeType= */ "mime-type-placeholder",
+        /* capabilities= */ null,
+        /* hardwareAccelerated= */ false,
+        /* softwareOnly= */ false,
+        /* vendor= */ false,
+        /* forceDisableAdaptive= */ false,
+        /* forceSecure= */ false);
+  }
+
+  private static TransformationException createTransformationException(
+      Exception cause, Format format, boolean isVideo, boolean isDecoder) {
+    String componentName = (isVideo ? "Video" : "Audio") + (isDecoder ? "Decoder" : "Encoder");
+    if (cause instanceof IOException) {
+      return TransformationException.createForCodec(
+          cause,
+          componentName,
+          format,
+          isDecoder
+              ? TransformationException.ERROR_CODE_DECODER_INIT_FAILED
+              : TransformationException.ERROR_CODE_ENCODER_INIT_FAILED);
+    }
+    if (cause instanceof IllegalArgumentException) {
+      return TransformationException.createForCodec(
+          cause,
+          componentName,
+          format,
+          isDecoder
+              ? TransformationException.ERROR_CODE_DECODING_FORMAT_UNSUPPORTED
+              : TransformationException.ERROR_CODE_ENCODING_FORMAT_UNSUPPORTED);
+    }
+    return TransformationException.createForUnexpected(cause);
+  }
+}

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/Transformer.java

@@ -107,6 +107,7 @@ public final class Transformer {
     private DebugViewProvider debugViewProvider;
     private Looper looper;
     private Clock clock;
+    private Codec.EncoderFactory encoderFactory;
 
     /** @deprecated Use {@link #Builder(Context)} instead. */
     @Deprecated
@@ -118,6 +119,7 @@ public final class Transformer {
       listener = new Listener() {};
       looper = Util.getCurrentOrMainLooper();
       clock = Clock.DEFAULT;
+      encoderFactory = Codec.EncoderFactory.DEFAULT;
       debugViewProvider = DebugViewProvider.NONE;
     }
 
@@ -135,6 +137,7 @@ public final class Transformer {
       listener = new Listener() {};
       looper = Util.getCurrentOrMainLooper();
       clock = Clock.DEFAULT;
+      encoderFactory = Codec.EncoderFactory.DEFAULT;
       debugViewProvider = DebugViewProvider.NONE;
     }
 
@@ -153,6 +156,7 @@ public final class Transformer {
       this.videoMimeType = transformer.transformation.videoMimeType;
       this.listener = transformer.listener;
       this.looper = transformer.looper;
+      this.encoderFactory = transformer.encoderFactory;
       this.debugViewProvider = transformer.debugViewProvider;
       this.clock = transformer.clock;
     }
@@ -361,6 +365,18 @@ public final class Transformer {
     }
 
     /**
+     * Sets the {@link Codec.EncoderFactory} that will be used by the transformer. The default value
+     * is {@link Codec.EncoderFactory#DEFAULT}.
+     *
+     * @param encoderFactory The {@link Codec.EncoderFactory} instance.
+     * @return This builder.
+     */
+    public Builder setEncoderFactory(Codec.EncoderFactory encoderFactory) {
+      this.encoderFactory = encoderFactory;
+      return this;
+    }
+
+    /**
      * Sets a provider for views to show diagnostic information (if available) during
      * transformation. This is intended for debugging. The default value is {@link
      * DebugViewProvider#NONE}, which doesn't show any debug info.
@@ -448,6 +464,8 @@ public final class Transformer {
           listener,
           looper,
           clock,
+          encoderFactory,
+          Codec.DecoderFactory.DEFAULT,
           debugViewProvider);
     }
 
@@ -536,6 +554,8 @@ public final class Transformer {
   private final Transformation transformation;
   private final Looper looper;
   private final Clock clock;
+  private final Codec.EncoderFactory encoderFactory;
+  private final Codec.DecoderFactory decoderFactory;
   private final Transformer.DebugViewProvider debugViewProvider;
 
   private Transformer.Listener listener;
@@ -551,6 +571,8 @@ public final class Transformer {
       Transformer.Listener listener,
       Looper looper,
       Clock clock,
+      Codec.EncoderFactory encoderFactory,
+      Codec.DecoderFactory decoderFactory,
       Transformer.DebugViewProvider debugViewProvider) {
     checkState(
         !transformation.removeAudio || !transformation.removeVideo,
@@ -562,6 +584,8 @@ public final class Transformer {
     this.listener = listener;
     this.looper = looper;
     this.clock = clock;
+    this.encoderFactory = encoderFactory;
+    this.decoderFactory = decoderFactory;
     this.debugViewProvider = debugViewProvider;
     progressState = PROGRESS_STATE_NO_TRANSFORMATION;
   }
@@ -662,7 +686,12 @@ public final class Transformer {
         new ExoPlayer.Builder(
                 context,
                 new TransformerRenderersFactory(
-                    context, muxerWrapper, transformation, debugViewProvider))
+                    context,
+                    muxerWrapper,
+                    transformation,
+                    encoderFactory,
+                    decoderFactory,
+                    debugViewProvider))
             .setMediaSourceFactory(mediaSourceFactory)
             .setTrackSelector(trackSelector)
             .setLoadControl(loadControl)
@@ -751,16 +780,22 @@ public final class Transformer {
     private final MuxerWrapper muxerWrapper;
     private final TransformerMediaClock mediaClock;
     private final Transformation transformation;
+    private final Codec.EncoderFactory encoderFactory;
+    private final Codec.DecoderFactory decoderFactory;
     private final Transformer.DebugViewProvider debugViewProvider;
 
     public TransformerRenderersFactory(
         Context context,
         MuxerWrapper muxerWrapper,
         Transformation transformation,
+        Codec.EncoderFactory encoderFactory,
+        Codec.DecoderFactory decoderFactory,
         Transformer.DebugViewProvider debugViewProvider) {
       this.context = context;
       this.muxerWrapper = muxerWrapper;
       this.transformation = transformation;
+      this.encoderFactory = encoderFactory;
+      this.decoderFactory = decoderFactory;
       this.debugViewProvider = debugViewProvider;
       mediaClock = new TransformerMediaClock();
     }
@@ -776,13 +811,21 @@ public final class Transformer {
       Renderer[] renderers = new Renderer[rendererCount];
       int index = 0;
       if (!transformation.removeAudio) {
-        renderers[index] = new TransformerAudioRenderer(muxerWrapper, mediaClock, transformation);
+        renderers[index] =
+            new TransformerAudioRenderer(
+                muxerWrapper, mediaClock, transformation, encoderFactory, decoderFactory);
         index++;
       }
       if (!transformation.removeVideo) {
         renderers[index] =
             new TransformerVideoRenderer(
-                context, muxerWrapper, mediaClock, transformation, debugViewProvider);
+                context,
+                muxerWrapper,
+                mediaClock,
+                transformation,
+                encoderFactory,
+                decoderFactory,
+                debugViewProvider);
         index++;
       }
       return renderers;

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerAudioRenderer.java

@@ -32,11 +32,19 @@ import com.google.android.exoplayer2.source.SampleStream.ReadDataResult;
 
   private static final String TAG = "TAudioRenderer";
 
+  private final Codec.EncoderFactory encoderFactory;
+  private final Codec.DecoderFactory decoderFactory;
   private final DecoderInputBuffer decoderInputBuffer;
 
   public TransformerAudioRenderer(
-      MuxerWrapper muxerWrapper, TransformerMediaClock mediaClock, Transformation transformation) {
+      MuxerWrapper muxerWrapper,
+      TransformerMediaClock mediaClock,
+      Transformation transformation,
+      Codec.EncoderFactory encoderFactory,
+      Codec.DecoderFactory decoderFactory) {
     super(C.TRACK_TYPE_AUDIO, muxerWrapper, mediaClock, transformation);
+    this.encoderFactory = encoderFactory;
+    this.decoderFactory = decoderFactory;
     decoderInputBuffer =
         new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
   }
@@ -60,7 +68,8 @@ import com.google.android.exoplayer2.source.SampleStream.ReadDataResult;
     }
     Format inputFormat = checkNotNull(formatHolder.format);
     if (shouldTranscode(inputFormat)) {
-      samplePipeline = new AudioSamplePipeline(inputFormat, transformation);
+      samplePipeline =
+          new AudioSamplePipeline(inputFormat, transformation, encoderFactory, decoderFactory);
     } else {
       samplePipeline = new PassthroughSamplePipeline(inputFormat);
     }

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerVideoRenderer.java

@@ -34,6 +34,8 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   private static final String TAG = "TVideoRenderer";
 
   private final Context context;
+  private final Codec.EncoderFactory encoderFactory;
+  private final Codec.DecoderFactory decoderFactory;
   private final Transformer.DebugViewProvider debugViewProvider;
   private final DecoderInputBuffer decoderInputBuffer;
 
@@ -44,9 +46,13 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
       MuxerWrapper muxerWrapper,
       TransformerMediaClock mediaClock,
       Transformation transformation,
+      Codec.EncoderFactory encoderFactory,
+      Codec.DecoderFactory decoderFactory,
       Transformer.DebugViewProvider debugViewProvider) {
     super(C.TRACK_TYPE_VIDEO, muxerWrapper, mediaClock, transformation);
     this.context = context;
+    this.encoderFactory = encoderFactory;
+    this.decoderFactory = decoderFactory;
     this.debugViewProvider = debugViewProvider;
     decoderInputBuffer =
         new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
@@ -72,7 +78,13 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
     Format inputFormat = checkNotNull(formatHolder.format);
     if (shouldTranscode(inputFormat)) {
       samplePipeline =
-          new VideoSamplePipeline(context, inputFormat, transformation, debugViewProvider);
+          new VideoSamplePipeline(
+              context,
+              inputFormat,
+              transformation,
+              encoderFactory,
+              decoderFactory,
+              debugViewProvider);
     } else {
       samplePipeline = new PassthroughSamplePipeline(inputFormat);
     }

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/VideoSamplePipeline.java

@@ -27,7 +27,6 @@ import androidx.annotation.RequiresApi;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
-import com.google.common.collect.ImmutableMap;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
 /**
@@ -39,9 +38,9 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
   private final int outputRotationDegrees;
   private final DecoderInputBuffer decoderInputBuffer;
-  private final MediaCodecAdapterWrapper decoder;
+  private final Codec decoder;
 
-  private final MediaCodecAdapterWrapper encoder;
+  private final Codec encoder;
   private final DecoderInputBuffer encoderOutputBuffer;
 
   private @MonotonicNonNull FrameEditor frameEditor;
@@ -52,6 +51,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       Context context,
       Format inputFormat,
       Transformation transformation,
+      Codec.EncoderFactory encoderFactory,
+      Codec.DecoderFactory decoderFactory,
       Transformer.DebugViewProvider debugViewProvider)
       throws TransformationException {
     decoderInputBuffer =
@@ -85,7 +86,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     transformation.transformationMatrix.postRotate(outputRotationDegrees);
 
     encoder =
-        MediaCodecAdapterWrapper.createForVideoEncoding(
+        encoderFactory.createForVideoEncoding(
             new Format.Builder()
                 .setWidth(outputWidth)
                 .setHeight(outputHeight)
@@ -94,8 +95,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
                     transformation.videoMimeType != null
                         ? transformation.videoMimeType
                         : inputFormat.sampleMimeType)
-                .build(),
-            ImmutableMap.of());
+                .build());
     if (inputFormat.height != outputHeight
         || inputFormat.width != outputWidth
         || !transformation.transformationMatrix.isIdentity()) {
@@ -109,7 +109,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
               debugViewProvider);
     }
     decoder =
-        MediaCodecAdapterWrapper.createForVideoDecoding(
+        decoderFactory.createForVideoDecoding(
             inputFormat,
             frameEditor == null
                 ? checkNotNull(encoder.getInputSurface())