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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-06-02 22:21:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-06-03 13:24:20 +0200 |
| commit | 8a266aaaacc0610c9ee1e3563ef345c46decb2b0 (patch) | |
| tree | 94282525254cea0eb04d32c35e7b42c0f8783eae /libavcodec | |
| parent | 96b71a6ec509023c892aaf9e7597ed0accbafb32 (diff) | |
| download | ffmpeg-8a266aaaacc0610c9ee1e3563ef345c46decb2b0.tar.gz | |
avcodec/jpeg2000dwt: merge rescaling with interleave in 9/7 int IDWT
Tha fate tests change because the edge mirroring was wrong before this commit
Reviewed-by: Nicolas BERTRAND <nicoinattendu@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dwt.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c index 13712d9703..266edece04 100644 --- a/libavcodec/jpeg2000dwt.c +++ b/libavcodec/jpeg2000dwt.c @@ -431,13 +431,6 @@ static void sr_1d97_int(int32_t *p, int i0, int i1) extend97_int(p, i0, i1); - /*step 1*/ - for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++) - p[2 * i] = ((p[2 * i] * I_LFTG_K) + (1 << 15)) >> 16; - /* step 2*/ - for (i = i0 / 2 - 2; i < i1 / 2 + 2; i++) - p[2 * i + 1] = ((p[2 * i + 1] * I_LFTG_X) + (1 << 15)) >> 16; - /* step 3*/ for (i = i0 / 2 - 1; i < i1 / 2 + 2; i++) p[2 * i] -= (I_LFTG_DELTA * (p[2 * i - 1] + p[2 * i + 1]) + (1 << 15)) >> 16; /* step 4 */ @@ -471,11 +464,11 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t) l = line + mh; for (lp = 0; lp < lv; lp++) { int i, j = 0; - // copy with interleaving + // rescale with interleaving for (i = mh; i < lh; i += 2, j++) - l[i] = data[w * lp + j]; + l[i] = ((data[w * lp + j] * I_LFTG_K) + (1 << 15)) >> 16; for (i = 1 - mh; i < lh; i += 2, j++) - l[i] = data[w * lp + j]; + l[i] = ((data[w * lp + j] * I_LFTG_X) + (1 << 15)) >> 16; sr_1d97_int(line, mh, mh + lh); @@ -487,11 +480,11 @@ static void dwt_decode97_int(DWTContext *s, int32_t *t) l = line + mv; for (lp = 0; lp < lh; lp++) { int i, j = 0; - // copy with interleaving + // rescale with interleaving for (i = mv; i < lv; i += 2, j++) - l[i] = data[w * j + lp]; + l[i] = ((data[w * j + lp] * I_LFTG_K) + (1 << 15)) >> 16; for (i = 1 - mv; i < lv; i += 2, j++) - l[i] = data[w * j + lp]; + l[i] = ((data[w * j + lp] * I_LFTG_X) + (1 << 15)) >> 16; sr_1d97_int(line, mv, mv + lv); |