Force output SDR_BT709_LIMITED when the input is SRGB

PiperOrigin-RevId: 790742779

Author: claincly

libraries/exoplayer/src/main/java/androidx/media3/exoplayer/video/PlaybackVideoGraphWrapper.java

@@ -580,6 +580,8 @@ private boolean registerInput(Format sourceFormat, int inputIndex)
                   "Color transfer %d is not supported. Falling back to OpenGl tone mapping.",
                   inputColorInfo.colorTransfer));
           outputColorInfo = ColorInfo.SDR_BT709_LIMITED;
+        } else if (inputColorInfo.colorTransfer == C.COLOR_TRANSFER_SRGB) {
+          outputColorInfo = ColorInfo.SDR_BT709_LIMITED;
         } else {
           outputColorInfo = inputColorInfo;
         }

libraries/test_data/src/test/assets/media/mp4/sample_srgb.mp4

@@ -402,6 +402,32 @@ public String toString() {
                   834_166L, 867_533L, 900_900L, 934_266L, 967_633L))
           .build();
 
+  public static final AssetInfo MP4_ASSET_SRGB =
+      new AssetInfo.Builder("asset:///media/mp4/sample_srgb.mp4")
+          .setVideoFormat(
+              new Format.Builder()
+                  .setSampleMimeType(VIDEO_H264)
+                  .setWidth(1080)
+                  .setHeight(720)
+                  .setFrameRate(29.97f)
+                  .setCodecs("avc1.64001F")
+                  .setColorInfo(
+                      new ColorInfo.Builder()
+                          .setColorRange(C.COLOR_RANGE_LIMITED)
+                          .setColorSpace(C.COLOR_SPACE_BT709)
+                          .setColorTransfer(C.COLOR_TRANSFER_SRGB)
+                          .build())
+                  .build())
+          .setVideoDurationUs(1_024_000L)
+          .setVideoFrameCount(30)
+          .setVideoTimestampsUs(
+              ImmutableList.of(
+                  0L, 33_366L, 66_733L, 100_100L, 133_466L, 166_833L, 200_200L, 233_566L, 266_933L,
+                  300_300L, 333_666L, 367_033L, 400_400L, 433_766L, 467_133L, 500_500L, 533_866L,
+                  567_233L, 600_600L, 633_966L, 667_333L, 700_700L, 734_066L, 767_433L, 800_800L,
+                  834_166L, 867_533L, 900_900L, 934_266L, 967_633L))
+          .build();
+
   public static final AssetInfo BT601_MOV_ASSET =
       new AssetInfo.Builder("asset:///media/mp4/bt601.mov")
           .setVideoFormat(

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

@@ -18,6 +18,7 @@
 import static androidx.media3.common.util.Util.isRunningOnEmulator;
 import static androidx.media3.common.util.Util.usToMs;
 import static androidx.media3.transformer.AndroidTestUtil.MP4_ASSET;
+import static androidx.media3.transformer.AndroidTestUtil.MP4_ASSET_SRGB;
 import static androidx.media3.transformer.AndroidTestUtil.MP4_VIDEO_ONLY_ASSET;
 import static androidx.media3.transformer.AndroidTestUtil.PNG_ASSET;
 import static androidx.media3.transformer.AndroidTestUtil.WAV_ASSET;
@@ -105,6 +106,13 @@ public long getNextSpeedChangeTimeUs(long timeUs) {
               .build(),
           MP4_ASSET.videoTimestampsUs,
           /* inputName= */ "Video");
+  private static final Input VIDEO_INPUT_SRGB =
+      new Input(
+          new EditedMediaItem.Builder(MediaItem.fromUri(MP4_ASSET_SRGB.uri))
+              .setDurationUs(MP4_ASSET_SRGB.videoDurationUs)
+              .build(),
+          MP4_ASSET_SRGB.videoTimestampsUs,
+          /* inputName= */ "Video_srgb");
   private static final Input VIDEO_INPUT_WITHOUT_AUDIO =
       new Input(
           new EditedMediaItem.Builder(MediaItem.fromUri(MP4_ASSET.uri))
@@ -202,6 +210,7 @@ public static ImmutableList<TestConfig> params() {
     ImmutableList.Builder<TestConfig> configs = new ImmutableList.Builder<>();
     // Single asset.
     configs.add(new TestConfig(new InputSequence(VIDEO_INPUT)));
+    configs.add(new TestConfig(new InputSequence(VIDEO_INPUT_SRGB)));
     configs.add(new TestConfig(new InputSequence(IMAGE_INPUT)));
     configs.add(new TestConfig(new InputSequence(AUDIO_INPUT)));
 
@@ -241,6 +250,10 @@ public static ImmutableList<TestConfig> params() {
     configs.add(
         new TestConfig(
             new InputSequence(VIDEO_ONLY_CLIPPED_HALF_SPEED, VIDEO_ONLY_CLIPPED_HALF_SPEED)));
+    configs.add(
+        new TestConfig(
+            new InputSequence(
+                VIDEO_INPUT, VIDEO_INPUT_SRGB, VIDEO_INPUT, IMAGE_INPUT, VIDEO_INPUT_SRGB)));
 
     // Multiple sequence.
     configs.add(