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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-04-10 21:10:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-04-10 21:18:33 +0200 |
| commit | b1ef4dc406e8a0bd9acea40d880aa4e74412075b (patch) | |
| tree | f27a7122240b7b2b28f6c151f1edbb9c03259aca /libswresample/dither.c | |
| parent | 0cff3e130bfe0471d58ca55655a9d2b73a2873f5 (diff) | |
| download | ffmpeg-b1ef4dc406e8a0bd9acea40d880aa4e74412075b.tar.gz | |
swr: add triangular dither support
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libswresample/dither.c')
| -rw-r--r-- | libswresample/dither.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libswresample/dither.c b/libswresample/dither.c index 4e39cceb0d..663e2007ba 100644 --- a/libswresample/dither.c +++ b/libswresample/dither.c @@ -40,6 +40,11 @@ void swri_get_dither(void *dst, int len, unsigned seed, enum AVSampleFormat out_ switch(method){ case SWR_DITHER_RECTANGULAR: v= ((double)seed) / UINT_MAX - 0.5; break; + case SWR_DITHER_TRIANGULAR : + v = ((double)seed) / UINT_MAX; + seed = seed*1664525 + 1013904223; + v-= ((double)seed) / UINT_MAX; + break; default: av_assert0(0); } |