avcodec/exr: use lookuptable for alpha if there is no trc_func

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index cf7824402a..e907c5c464 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -1203,7 +1203,7 @@ static int decode_block(AVCodecContext *avctx, void *tdata,
                     }
                 } else if (s->pixel_type == EXR_HALF) {
                     // 16-bit
-                    if (c < 3) {
+                    if (c < 3 || !trc_func) {
                         for (x = 0; x < xsize; x++) {
                             *ptr_x++ = s->gamma_table[bytestream_get_le16(&src)];
                         }