Gamma 2.2 and Gamma 2.8 are tagged in the file as 0.45455 and 0.35714,
respectively (i.e. 1/2.2 and 1/2.8). Trying to identify them as 2.2 and
2.8 instead of these values will cause the transfer function to not
properly be recognized. This patch fixes this.
---
libavcodec/libjxldec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libavcodec/libjxldec.c b/libavcodec/libjxldec.c
index 55c7366f61..0009af9615 100644
--- a/libavcodec/libjxldec.c
+++ b/libavcodec/libjxldec.c
@@ -167,9 +167,9 @@ static enum AVColorTransferCharacteristic
libjxl_get_trc(void *avctx, const JxlC
case JXL_TRANSFER_FUNCTION_DCI: return AVCOL_TRC_SMPTE428;
case JXL_TRANSFER_FUNCTION_HLG: return AVCOL_TRC_ARIB_STD_B67;
case JXL_TRANSFER_FUNCTION_GAMMA:
- if (jxl_color->gamma > 2.199 && jxl_color->gamma < 2.201)
+ if (jxl_color->gamma > 0.45355 && jxl_color->gamma < 0.45555)
return AVCOL_TRC_GAMMA22;
- else if (jxl_color->gamma > 2.799 && jxl_color->gamma < 2.801)
+ else if (jxl_color->gamma > 0.35614 && jxl_color->gamma < 0.35814)
return AVCOL_TRC_GAMMA28;
else
av_log(avctx, AV_LOG_WARNING, "Unsupported gamma transfer: %f\n",
jxl_color->gamma);
--
2.39.0
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