diff options
Diffstat (limited to 'libavcodec/lossless_videodsp.c')
| -rw-r--r-- | libavcodec/lossless_videodsp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavcodec/lossless_videodsp.c b/libavcodec/lossless_videodsp.c index b5b96e6129..cff94c234d 100644 --- a/libavcodec/lossless_videodsp.c +++ b/libavcodec/lossless_videodsp.c @@ -98,6 +98,16 @@ static int add_left_pred_int16_c(uint16_t *dst, const uint16_t *src, unsigned ma return acc; } +static void add_gradient_pred_c(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width){ + int A, B, C, i; + + for (i = 0; i < width; i++) { + A = src[i - stride]; + B = src[i - (stride + 1)]; + C = src[i - 1]; + src[i] = (A - B + C + src[i]) & 0xFF; + } +} void ff_llviddsp_init(LLVidDSPContext *c) { @@ -106,6 +116,7 @@ void ff_llviddsp_init(LLVidDSPContext *c) c->add_left_pred = add_left_pred_c; c->add_left_pred_int16 = add_left_pred_int16_c; + c->add_gradient_pred = add_gradient_pred_c; if (ARCH_PPC) ff_llviddsp_init_ppc(c); |