Add audio/video sample mime type in ExportResult

PiperOrigin-RevId: 603013441

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerEndToEndTest.java

@@ -925,8 +925,8 @@ public class TransformerEndToEndTest {
   }
 
   @Test
-  public void transcode_withOutputMimeTypeAv1_completesSuccessfully() throws Exception {
-    String testId = "transcode_withOutputMimeTypeAv1_completesSuccessfully";
+  public void transcode_withOutputVideoMimeTypeAv1_completesSuccessfully() throws Exception {
+    String testId = "transcode_withOutputVideoMimeTypeAv1_completesSuccessfully";
     if (AndroidTestUtil.skipAndLogIfFormatsUnsupported(
         context,
         testId,
@@ -943,13 +943,36 @@ public class TransformerEndToEndTest {
     Transformer transformer =
         new Transformer.Builder(context).setVideoMimeType(MimeTypes.VIDEO_AV1).build();
 
-    ExportTestResult exportTestResult =
+    ExportResult exportResult =
         new TransformerAndroidTestRunner.Builder(context, transformer)
             .build()
-            .run(testId, editedMediaItem);
+            .run(testId, editedMediaItem)
+            .exportResult;
 
-    // TODO: b/322813915 - Assert on output mime type.
-    assertThat(exportTestResult.exportResult.exportException).isNull();
+    // TODO: b/322954582 - Also assert by probing output file.
+    assertThat(exportResult.exportException).isNull();
+    assertThat(exportResult.durationMs).isGreaterThan(0);
+    assertThat(exportResult.videoMimeType).isEqualTo(MimeTypes.VIDEO_AV1);
+  }
+
+  @Test
+  public void transcode_withOutputAudioMimeTypeAac_completesSuccessfully() throws Exception {
+    String testId = "transcode_withOutputAudioMimeTypeAac_completesSuccessfully";
+    MediaItem mediaItem = MediaItem.fromUri(Uri.parse(MP3_ASSET_URI_STRING));
+    EditedMediaItem editedMediaItem = new EditedMediaItem.Builder(mediaItem).build();
+    Transformer transformer =
+        new Transformer.Builder(context).setAudioMimeType(MimeTypes.AUDIO_AAC).build();
+
+    ExportResult exportResult =
+        new TransformerAndroidTestRunner.Builder(context, transformer)
+            .build()
+            .run(testId, editedMediaItem)
+            .exportResult;
+
+    // TODO: b/322954582 - Also assert by probing output file.
+    assertThat(exportResult.exportException).isNull();
+    assertThat(exportResult.durationMs).isGreaterThan(0);
+    assertThat(exportResult.audioMimeType).isEqualTo(MimeTypes.AUDIO_AAC);
   }
 
   private static AudioProcessor createSonic(float pitch) {

libraries/transformer/src/main/java/androidx/media3/transformer/ExportResult.java

@@ -23,6 +23,7 @@ import androidx.annotation.Nullable;
 import androidx.media3.common.C;
 import androidx.media3.common.ColorInfo;
 import androidx.media3.common.MediaItem;
+import androidx.media3.common.MimeTypes;
 import androidx.media3.common.util.UnstableApi;
 import com.google.common.collect.ImmutableList;
 import com.google.errorprone.annotations.CanIgnoreReturnValue;
@@ -46,12 +47,14 @@ public final class ExportResult {
     private int channelCount;
     private int sampleRate;
     @Nullable private String audioEncoderName;
+    @Nullable private String audioMimeType;
     private int averageVideoBitrate;
     @Nullable private ColorInfo colorInfo;
     private int height;
     private int width;
     private int videoFrameCount;
     @Nullable private String videoEncoderName;
+    @Nullable private String videoMimeType;
     private @OptimizationResult int optimizationResult;
     @Nullable private ExportException exportException;
 
@@ -137,6 +140,13 @@ public final class ExportResult {
       return this;
     }
 
+    /** Sets the output audio {@linkplain androidx.media3.common.MimeTypes mime type}. */
+    @CanIgnoreReturnValue
+    public Builder setAudioMimeType(@Nullable String audioMimeType) {
+      this.audioMimeType = audioMimeType;
+      return this;
+    }
+
     /**
      * Sets the average video bitrate.
      *
@@ -199,6 +209,13 @@ public final class ExportResult {
       return this;
     }
 
+    /** Sets the output video {@linkplain androidx.media3.common.MimeTypes mime type}. */
+    @CanIgnoreReturnValue
+    public Builder setVideoMimeType(@Nullable String videoMimeType) {
+      this.videoMimeType = videoMimeType;
+      return this;
+    }
+
     /**
      * Sets {@link OptimizationResult} to indicate an optimization as been successful, or has failed
      * and normal export proceeded instead.
@@ -231,12 +248,14 @@ public final class ExportResult {
           channelCount,
           sampleRate,
           audioEncoderName,
+          audioMimeType,
           averageVideoBitrate,
           colorInfo,
           height,
           width,
           videoFrameCount,
           videoEncoderName,
+          videoMimeType,
           optimizationResult,
           exportException);
     }
@@ -382,6 +401,9 @@ public final class ExportResult {
   /** The name of the audio encoder used, or {@code null} if none were used. */
   @Nullable public final String audioEncoderName;
 
+  /** The output audio {@linkplain MimeTypes mime type}, or {@code null} if unset or unknown. */
+  @Nullable public final String audioMimeType;
+
   /**
    * The average bitrate of the video track data, or {@link C#RATE_UNSET_INT} if unset or unknown.
    */
@@ -402,6 +424,9 @@ public final class ExportResult {
   /** The name of the video encoder used, or {@code null} if none were used. */
   @Nullable public final String videoEncoderName;
 
+  /** The output video {@linkplain MimeTypes mime type}, or {@code null} if unset or unknown. */
+  @Nullable public final String videoMimeType;
+
   /** The result of any requested optimizations. */
   public final @OptimizationResult int optimizationResult;
 
@@ -419,12 +444,14 @@ public final class ExportResult {
       int channelCount,
       int sampleRate,
       @Nullable String audioEncoderName,
+      @Nullable String audioMimeType,
       int averageVideoBitrate,
       @Nullable ColorInfo colorInfo,
       int height,
       int width,
       int videoFrameCount,
       @Nullable String videoEncoderName,
+      @Nullable String videoMimeType,
       @OptimizationResult int optimizationResult,
       @Nullable ExportException exportException) {
     this.processedInputs = processedInputs;
@@ -434,12 +461,14 @@ public final class ExportResult {
     this.channelCount = channelCount;
     this.sampleRate = sampleRate;
     this.audioEncoderName = audioEncoderName;
+    this.audioMimeType = audioMimeType;
     this.averageVideoBitrate = averageVideoBitrate;
     this.colorInfo = colorInfo;
     this.height = height;
     this.width = width;
     this.videoFrameCount = videoFrameCount;
     this.videoEncoderName = videoEncoderName;
+    this.videoMimeType = videoMimeType;
     this.optimizationResult = optimizationResult;
     this.exportException = exportException;
   }
@@ -453,12 +482,14 @@ public final class ExportResult {
         .setChannelCount(channelCount)
         .setSampleRate(sampleRate)
         .setAudioEncoderName(audioEncoderName)
+        .setAudioMimeType(audioMimeType)
         .setAverageVideoBitrate(averageVideoBitrate)
         .setColorInfo(colorInfo)
         .setHeight(height)
         .setWidth(width)
         .setVideoFrameCount(videoFrameCount)
         .setVideoEncoderName(videoEncoderName)
+        .setVideoMimeType(videoMimeType)
         .setOptimizationResult(optimizationResult)
         .setExportException(exportException);
   }
@@ -479,12 +510,14 @@ public final class ExportResult {
         && channelCount == result.channelCount
         && sampleRate == result.sampleRate
         && Objects.equals(audioEncoderName, result.audioEncoderName)
+        && Objects.equals(audioMimeType, result.audioMimeType)
         && averageVideoBitrate == result.averageVideoBitrate
         && Objects.equals(colorInfo, result.colorInfo)
         && height == result.height
         && width == result.width
         && videoFrameCount == result.videoFrameCount
         && Objects.equals(videoEncoderName, result.videoEncoderName)
+        && Objects.equals(videoMimeType, result.videoMimeType)
         && optimizationResult == result.optimizationResult
         && Objects.equals(exportException, result.exportException);
   }
@@ -498,12 +531,14 @@ public final class ExportResult {
     result = 31 * result + channelCount;
     result = 31 * result + sampleRate;
     result = 31 * result + Objects.hashCode(audioEncoderName);
+    result = 31 * result + Objects.hashCode(audioMimeType);
     result = 31 * result + averageVideoBitrate;
     result = 31 * result + Objects.hashCode(colorInfo);
     result = 31 * result + height;
     result = 31 * result + width;
     result = 31 * result + videoFrameCount;
     result = 31 * result + Objects.hashCode(videoEncoderName);
+    result = 31 * result + Objects.hashCode(videoMimeType);
     result = 31 * result + optimizationResult;
     result = 31 * result + Objects.hashCode(exportException);
     return result;

libraries/transformer/src/main/java/androidx/media3/transformer/Transformer.java

@@ -1643,7 +1643,9 @@ public final class Transformer {
     public void onTrackEnded(
         @C.TrackType int trackType, Format format, int averageBitrate, int sampleCount) {
       if (trackType == C.TRACK_TYPE_AUDIO) {
-        exportResultBuilder.setAverageAudioBitrate(averageBitrate);
+        exportResultBuilder
+            .setAudioMimeType(format.sampleMimeType)
+            .setAverageAudioBitrate(averageBitrate);
         if (format.channelCount != Format.NO_VALUE) {
           exportResultBuilder.setChannelCount(format.channelCount);
         }
@@ -1652,6 +1654,7 @@ public final class Transformer {
         }
       } else if (trackType == C.TRACK_TYPE_VIDEO) {
         exportResultBuilder
+            .setVideoMimeType(format.sampleMimeType)
             .setAverageVideoBitrate(averageBitrate)
             .setColorInfo(format.colorInfo)
             .setVideoFrameCount(sampleCount);