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avcodec/libjxlenc: use reciprocol gamma for GAMMA22 and GAMMA28

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libjxl rejects JxlColorEncoding->gamma 2.2f or 2.8f and expects
1/2.2f or 1/2.8f, respectively.

Signed-off-by: Leo Izen <leo.izen@gmail.com>
This commit is contained in:
Leo Izen
2023-04-04 10:16:21 -04:00
parent 00a062b8d5
commit 1179bb703e
1 changed files with 2 additions and 2 deletions
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4
libavcodec/libjxlenc.c
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@@ -335,11 +335,11 @@ static int libjxl_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFra
break; break;
case AVCOL_TRC_GAMMA22: case AVCOL_TRC_GAMMA22:
jxl_color.transfer_function = JXL_TRANSFER_FUNCTION_GAMMA; jxl_color.transfer_function = JXL_TRANSFER_FUNCTION_GAMMA;
jxl_color.gamma = 2.2; jxl_color.gamma = 1/2.2f;
break; break;
case AVCOL_TRC_GAMMA28: case AVCOL_TRC_GAMMA28:
jxl_color.transfer_function = JXL_TRANSFER_FUNCTION_GAMMA; jxl_color.transfer_function = JXL_TRANSFER_FUNCTION_GAMMA;
jxl_color.gamma = 2.8; jxl_color.gamma = 1/2.8f;
break; break;
default: default:
if (pix_desc->flags & AV_PIX_FMT_FLAG_FLOAT) { if (pix_desc->flags & AV_PIX_FMT_FLAG_FLOAT) {