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

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This commit is contained in:
Paul B Mahol 2021-02-28 23:14:40 +01:00
parent f01d522cf3
commit 4cb989e836
1 changed files with 6 additions and 1 deletions
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7
libavcodec/exr.c
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@ -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