Commit c511a7fcf7 for ffmpeg

commit c511a7fcf7c0ac799eac0204a674780696872df3
Author: Martin Mirchev <mmirchev@comp.nus.edu.sg>
Date:   Wed Oct 21 18:26:38 2026 +0800

    fate/image: add a test for 16-bit JPEG-LS with line interleaving

    Encode a 16-bit gray image with the jpegls encoder, set the ILV byte of
    the SOS header to 1 and check that it decodes to the source picture.

    Signed-off-by: Martin Mirchev <mmirchev@comp.nus.edu.sg>

diff --git a/tests/fate/image.mak b/tests/fate/image.mak
index a42d19861a..a1e59eda64 100644
--- a/tests/fate/image.mak
+++ b/tests/fate/image.mak
@@ -394,6 +394,21 @@ FATE_JPEGLS-$(call DEMDEC, IMAGE2, JPEGLS) += $(FATE_JPEGLS)
 FATE_IMAGE_FRAMECRC += $(FATE_JPEGLS-yes)
 fate-jpegls: $(FATE_JPEGLS-yes)

+# Exercise tolerance of a nonconforming single-component scan with ILV=1:
+# decode its ILV=0 payload using the correct sample width.
+# Encode a 16-bit gray image and set the ILV byte of the SOS header (offset 23)
+# to 1; the output must match the source.
+JPEGLS_ILV1_GEN = $(FFMPEG) -nostdin -v error -f lavfi -i testsrc2=s=64x64,format=gray16le \
+    -frames:v 1 -c:v jpegls -flags +bitexact -fflags +bitexact -f image2 -y
+JPEGLS_ILV1_DEC = $(FFMPEG) -nostdin -v error -flags +bitexact -fflags +bitexact \
+    -pix_fmt gray16le -vf scale -f framecrc - -i
+FATE_JPEGLS_ILV1-$(call ENCDEC, JPEGLS, IMAGE2, LAVFI_INDEV TESTSRC2_FILTER FORMAT_FILTER \
+                    WRAPPED_AVFRAME_DECODER RAWVIDEO_ENCODER SCALE_FILTER \
+                    FRAMECRC_MUXER PIPE_PROTOCOL) += fate-jpegls-ilv1-16bit
+fate-jpegls-ilv1-16bit: CMD = run_with_patched_temp "$(JPEGLS_ILV1_GEN)" "$(JPEGLS_ILV1_DEC)" jls 23 "\\0001"
+FATE_FFMPEG += $(FATE_JPEGLS_ILV1-yes)
+fate-jpegls: $(FATE_JPEGLS_ILV1-yes)
+
 FATE_IMAGE_FRAMECRC-$(call DEMDEC, IMAGE2, QDRAW) += fate-pict
 fate-pict: CMD = framecrc -i $(TARGET_SAMPLES)/quickdraw/TRU256.PCT -pix_fmt rgb24

diff --git a/tests/ref/fate/jpegls-ilv1-16bit b/tests/ref/fate/jpegls-ilv1-16bit
new file mode 100644
index 0000000000..ca238f13f3
--- /dev/null
+++ b/tests/ref/fate/jpegls-ilv1-16bit
@@ -0,0 +1,6 @@
+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 64x64
+#sar 0: 0/1
+0,          0,          0,        1,     8192, 0xb5879ab5