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| author | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-12 23:32:57 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-01-13 18:55:46 +0100 |
| commit | bbd977162590db4b29a5532e3e7102e054ff3ae0 (patch) | |
| tree | c916bb8955830b7751ac5a3b55e30b734151e32b /libavcodec | |
| parent | da144c2ddd8cb002540c219dce9ef4303d2b4ee5 (diff) | |
| download | ffmpeg-bbd977162590db4b29a5532e3e7102e054ff3ae0.tar.gz | |
avcodec/diracdec: Factor +2 out of the inner loop
Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/diracdec.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index fe879bb726..bbe6d87bc9 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -517,7 +517,7 @@ static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffse coeff = ret - 1; } if (coeff) { - coeff = (coeff * qfactor + qoffset + 2) >> 2; + coeff = (coeff * qfactor + qoffset) >> 2; sign = SHOW_SBITS(re, gb, 1); LAST_SKIP_BITS(re, gb, 1); coeff = (coeff ^ sign) - sign; @@ -548,7 +548,7 @@ static inline int coeff_unpack_golomb(GetBitContext *gb, int qfactor, int qoffse } \ coeff = dirac_get_arith_uint(c, pred_ctx, CTX_COEFF_DATA); \ if (coeff) { \ - coeff = (coeff * qfactor + qoffset + 2) >> 2; \ + coeff = (coeff * qfactor + qoffset) >> 2; \ sign = dirac_get_arith_bit(c, SIGN_CTX(sign_pred)); \ coeff = (coeff ^ -sign) + sign; \ } \ @@ -600,9 +600,9 @@ static inline void codeblock(DiracContext *s, SubBand *b, qfactor = qscale_tab[b->quant]; /* TODO: context pointer? */ if (!s->num_refs) - qoffset = qoffset_intra_tab[b->quant]; + qoffset = qoffset_intra_tab[b->quant] + 2; else - qoffset = qoffset_inter_tab[b->quant]; + qoffset = qoffset_inter_tab[b->quant] + 2; buf = b->ibuf + top * b->stride; if (is_arith) { @@ -776,7 +776,7 @@ static void decode_subband(DiracContext *s, GetBitContext *gb, int quant, int bottom = b1->height *(slice_y+1) / s->num_y; int qfactor = qscale_tab[quant & 0x7f]; - int qoffset = qoffset_intra_tab[quant & 0x7f]; + int qoffset = qoffset_intra_tab[quant & 0x7f] + 2; uint8_t *buf1 = b1->ibuf + top * b1->stride; uint8_t *buf2 = b2 ? b2->ibuf + top * b2->stride: NULL; |