/*
* Copyright 2023 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 androidx.media3.transformer;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.Effect;
import androidx.media3.common.Format;
import androidx.media3.common.Metadata;
import androidx.media3.common.MimeTypes;
import androidx.media3.effect.GlEffect;
import androidx.media3.extractor.metadata.mp4.SlowMotionData;
import com.google.common.collect.ImmutableList;
/** Utility methods for Transformer. */
/* package */ final class TransformerUtil {
private TransformerUtil() {}
/**
* Returns the {@link C.TrackType track type} constant corresponding to how a specified MIME type
* should be processed, which may be {@link C#TRACK_TYPE_UNKNOWN} if it could not be determined.
*
* <p>{@linkplain MimeTypes#isImage Image} MIME types are processed as {@link C#TRACK_TYPE_VIDEO}.
*
* <p>See {@link MimeTypes#getTrackType} for more details.
*/
public static @C.TrackType int getProcessedTrackType(@Nullable String mimeType) {
@C.TrackType int trackType = MimeTypes.getTrackType(mimeType);
return trackType == C.TRACK_TYPE_IMAGE ? C.TRACK_TYPE_VIDEO : trackType;
}
/**
* Returns whether the collection of {@code videoEffects} would be a {@linkplain
* GlEffect#isNoOp(int, int) no-op}, if queued samples of this {@link Format}.
*/
public static boolean areVideoEffectsAllNoOp(
ImmutableList<Effect> videoEffects, Format inputFormat) {
int decodedWidth =
(inputFormat.rotationDegrees % 180 == 0) ? inputFormat.width : inputFormat.height;
int decodedHeight =
(inputFormat.rotationDegrees % 180 == 0) ? inputFormat.height : inputFormat.width;
for (int i = 0; i < videoEffects.size(); i++) {
Effect videoEffect = videoEffects.get(i);
if (!(videoEffect instanceof GlEffect)) {
// We cannot confirm whether Effect instances that are not GlEffect instances are
// no-ops.
return false;
}
GlEffect glEffect = (GlEffect) videoEffect;
if (!glEffect.isNoOp(decodedWidth, decodedHeight)) {
return false;
}
}
return true;
}
/**
* Returns whether the {@link Format} contains {@linkplain SlowMotionData slow motion metadata}.
*/
public static boolean containsSlowMotionData(Format format) {
@Nullable Metadata metadata = format.metadata;
if (metadata == null) {
return false;
}
for (int i = 0; i < metadata.length(); i++) {
if (metadata.get(i) instanceof SlowMotionData) {
return true;
}
}
return false;
}
}