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This method is useful for other tests also. PiperOrigin-RevId: 473574282
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.../libraries/effect/src/androidTest/java/androidx/media3/effect/FrameProcessorTestUtil.java
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| /* | ||
| * 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. | ||
| */ | ||
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|
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| package androidx.media3.effect; | ||
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| import static androidx.test.core.app.ApplicationProvider.getApplicationContext; | ||
| import static com.google.android.exoplayer2.util.Assertions.checkNotNull; | ||
| import static com.google.android.exoplayer2.util.Assertions.checkStateNotNull; | ||
| import static com.google.common.truth.Truth.assertThat; | ||
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| import android.content.Context; | ||
| import android.content.res.AssetFileDescriptor; | ||
| import android.graphics.SurfaceTexture; | ||
| import android.media.MediaCodec; | ||
| import android.media.MediaExtractor; | ||
| import android.media.MediaFormat; | ||
| import android.view.Surface; | ||
| import androidx.media3.common.FrameProcessor; | ||
| import com.google.android.exoplayer2.util.MimeTypes; | ||
| import java.nio.ByteBuffer; | ||
| import org.checkerframework.checker.nullness.qual.Nullable; | ||
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| /** Utilities for instrumentation tests for {@link FrameProcessor}. */ | ||
| public class FrameProcessorTestUtil { | ||
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| /** Listener for decoding events. */ | ||
| interface Listener { | ||
| /** Called when the video {@link MediaFormat} is extracted from the container. */ | ||
| void onVideoMediaFormatExtracted(MediaFormat mediaFormat); | ||
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| /** Called when the video {@link MediaFormat} is read by the decoder from the byte stream. */ | ||
| void onVideoMediaFormatRead(MediaFormat mediaFormat); | ||
| } | ||
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| /** Timeout for dequeueing buffers from the codec, in microseconds. */ | ||
| private static final int DEQUEUE_TIMEOUT_US = 5_000_000; | ||
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| /** | ||
| * Decodes one frame from the {@code assetFilePath} and renders it to the {@code surface}. | ||
| * | ||
| * @param assetFilePath The path to the file in the asset directory. | ||
| * @param listener A {@link Listener} implementation. | ||
| * @param surface The {@link Surface} to render the decoded frame to, {@code null} if the decoded | ||
| * frame is not needed. | ||
| */ | ||
| public static void decodeOneFrame( | ||
| String assetFilePath, Listener listener, @Nullable Surface surface) throws Exception { | ||
| // Set up the extractor to read the first video frame and get its format. | ||
| if (surface == null) { | ||
| // Creates a placeholder surface. | ||
| surface = new Surface(new SurfaceTexture(/* texName= */ 0)); | ||
| } | ||
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| MediaExtractor mediaExtractor = new MediaExtractor(); | ||
| @Nullable MediaCodec mediaCodec = null; | ||
| @Nullable MediaFormat mediaFormat = null; | ||
| Context context = getApplicationContext(); | ||
| try (AssetFileDescriptor afd = context.getAssets().openFd(assetFilePath)) { | ||
| mediaExtractor.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); | ||
| for (int i = 0; i < mediaExtractor.getTrackCount(); i++) { | ||
| if (MimeTypes.isVideo(mediaExtractor.getTrackFormat(i).getString(MediaFormat.KEY_MIME))) { | ||
| mediaFormat = mediaExtractor.getTrackFormat(i); | ||
| listener.onVideoMediaFormatExtracted(checkNotNull(mediaFormat)); | ||
| mediaExtractor.selectTrack(i); | ||
| break; | ||
| } | ||
| } | ||
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| checkStateNotNull(mediaFormat); | ||
| // Queue the first video frame from the extractor. | ||
| String mimeType = checkNotNull(mediaFormat.getString(MediaFormat.KEY_MIME)); | ||
| mediaCodec = MediaCodec.createDecoderByType(mimeType); | ||
| mediaCodec.configure(mediaFormat, surface, /* crypto= */ null, /* flags= */ 0); | ||
| mediaCodec.start(); | ||
| int inputBufferIndex = mediaCodec.dequeueInputBuffer(DEQUEUE_TIMEOUT_US); | ||
| assertThat(inputBufferIndex).isNotEqualTo(MediaCodec.INFO_TRY_AGAIN_LATER); | ||
| ByteBuffer inputBuffer = checkNotNull(mediaCodec.getInputBuffers()[inputBufferIndex]); | ||
| int sampleSize = mediaExtractor.readSampleData(inputBuffer, /* offset= */ 0); | ||
| mediaCodec.queueInputBuffer( | ||
| inputBufferIndex, | ||
| /* offset= */ 0, | ||
| sampleSize, | ||
| mediaExtractor.getSampleTime(), | ||
| mediaExtractor.getSampleFlags()); | ||
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| // Queue an end-of-stream buffer to force the codec to produce output. | ||
| inputBufferIndex = mediaCodec.dequeueInputBuffer(DEQUEUE_TIMEOUT_US); | ||
| assertThat(inputBufferIndex).isNotEqualTo(MediaCodec.INFO_TRY_AGAIN_LATER); | ||
| mediaCodec.queueInputBuffer( | ||
| inputBufferIndex, | ||
| /* offset= */ 0, | ||
| /* size= */ 0, | ||
| /* presentationTimeUs= */ 0, | ||
| MediaCodec.BUFFER_FLAG_END_OF_STREAM); | ||
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| // Dequeue and render the output video frame. | ||
| MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo(); | ||
| int outputBufferIndex; | ||
| boolean decoderFormatRead = false; | ||
| do { | ||
| outputBufferIndex = mediaCodec.dequeueOutputBuffer(bufferInfo, DEQUEUE_TIMEOUT_US); | ||
| if (!decoderFormatRead && outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { | ||
| listener.onVideoMediaFormatRead(mediaCodec.getOutputFormat()); | ||
| decoderFormatRead = true; | ||
| } | ||
| assertThat(outputBufferIndex).isNotEqualTo(MediaCodec.INFO_TRY_AGAIN_LATER); | ||
| } while (outputBufferIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED | ||
| || outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED); | ||
| mediaCodec.releaseOutputBuffer(outputBufferIndex, /* render= */ true); | ||
| } finally { | ||
| mediaExtractor.release(); | ||
| if (mediaCodec != null) { | ||
| mediaCodec.release(); | ||
| } | ||
| } | ||
| } | ||
|
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| private FrameProcessorTestUtil() {} | ||
| } |
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