avcodec/exr: add fast path for case when powf() isn't needed

4 years ago · 4cb989e836
parent f01d522cf3
commit 4cb989e836
1 changed files with 6 additions and 1 deletions
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@ -1130,13 +1130,18 @@ static int decode_block(AVCodecContext *avctx, void *tdata,
                            t.f = trc_func(t.f);
                            *ptr_x++ = t;
                        }
-                    } else {
+                    } else if (one_gamma != 1.f) {
                        for (x = 0; x < xsize; x++) {
                            t.i = bytestream_get_le32(&src);
                            if (t.f > 0.0f && c < 3)  /* avoid negative values */
                                t.f = powf(t.f, one_gamma);
                            *ptr_x++ = t;
                        }
+                    } else {
+                        for (x = 0; x < xsize; x++) {
+                            t.i = bytestream_get_le32(&src);
+                            *ptr_x++ = t;
+                        }
                    }
                } else if (s->pixel_type == EXR_HALF) {
                    // 16-bit