/*
* Copyright 2020 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 static androidx.media3.common.util.Assertions.checkNotNull;
import static androidx.media3.exoplayer.source.SampleStream.FLAG_REQUIRE_FORMAT;
import androidx.annotation.Nullable;
import androidx.media3.common.C;
import androidx.media3.common.Format;
import androidx.media3.common.Metadata;
import androidx.media3.decoder.DecoderInputBuffer;
import androidx.media3.exoplayer.FormatHolder;
import androidx.media3.exoplayer.source.SampleStream.ReadDataResult;
import androidx.media3.extractor.metadata.mp4.SlowMotionData;
/* package */ final class TransformerAudioRenderer extends TransformerBaseRenderer {
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,
TransformationRequest transformationRequest,
Codec.EncoderFactory encoderFactory,
Codec.DecoderFactory decoderFactory,
FallbackListener fallbackListener) {
super(C.TRACK_TYPE_AUDIO, muxerWrapper, mediaClock, transformationRequest, fallbackListener);
this.encoderFactory = encoderFactory;
this.decoderFactory = decoderFactory;
decoderInputBuffer =
new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
}
@Override
public String getName() {
return TAG;
}
/** Attempts to read the input format and to initialize the {@link SamplePipeline}. */
@Override
protected boolean ensureConfigured() throws TransformationException {
if (samplePipeline != null) {
return true;
}
FormatHolder formatHolder = getFormatHolder();
@ReadDataResult
int result = readSource(formatHolder, decoderInputBuffer, /* readFlags= */ FLAG_REQUIRE_FORMAT);
if (result != C.RESULT_FORMAT_READ) {
return false;
}
Format inputFormat = checkNotNull(formatHolder.format);
if (shouldPassthrough(inputFormat)) {
samplePipeline =
new PassthroughSamplePipeline(inputFormat, transformationRequest, fallbackListener);
} else {
samplePipeline =
new AudioTranscodingSamplePipeline(
inputFormat,
transformationRequest,
decoderFactory,
encoderFactory,
muxerWrapper.getSupportedSampleMimeTypes(getTrackType()),
fallbackListener);
}
return true;
}
private boolean shouldPassthrough(Format inputFormat) {
if (transformationRequest.audioMimeType != null
&& !transformationRequest.audioMimeType.equals(inputFormat.sampleMimeType)) {
return false;
}
if (transformationRequest.audioMimeType == null
&& !muxerWrapper.supportsSampleMimeType(inputFormat.sampleMimeType)) {
return false;
}
if (transformationRequest.flattenForSlowMotion && isSlowMotion(inputFormat)) {
return false;
}
return true;
}
private static boolean isSlowMotion(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;
}
}