diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2015-06-17 15:24:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-06-17 15:24:14 +0200 |
| commit | 7c3f7e6ed1856ba17ee903427ca229a14771062b (patch) | |
| tree | 1dcaa66c5bfbbde688e446c6ec621fff5fa10eeb /libavcodec | |
| parent | 9841024402e83e0d239edf4f356d97e0519aaf4d (diff) | |
avcodec/jpeg2000dwt: Support 9/7 singularity cases on the encoder side
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/jpeg2000dwt.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/libavcodec/jpeg2000dwt.c b/libavcodec/jpeg2000dwt.c index 511f223718..ae150fb433 100644 --- a/libavcodec/jpeg2000dwt.c +++ b/libavcodec/jpeg2000dwt.c @@ -150,8 +150,13 @@ static void sd_1d97_float(float *p, int i0, int i1) { int i; - if (i1 == i0 + 1) + if (i1 <= i0 + 1) { + if (i0 == 1) + p[1] *= F_LFTG_X; + else + p[0] *= F_LFTG_K; return; + } extend97_float(p, i0, i1); i0++; i1++; @@ -222,8 +227,13 @@ static void sd_1d97_int(int *p, int i0, int i1) { int i; - if (i1 == i0 + 1) + if (i1 <= i0 + 1) { + if (i0 == 1) + p[1] = (p[1] * I_LFTG_X + (1<<15)) >> 16; + else + p[0] = (p[0] * I_LFTG_K + (1<<15)) >> 16; return; + } extend97_int(p, i0, i1); i0++; i1++; |