From: Wu Jianhua <toq...@outlook.com>
See 8.7.4.6 Residual modification process for blocks using colour space
conversion
Signed-off-by: Wu Jianhua <toq...@outlook.com>
---
libavcodec/vvc/dsp.h | 2 ++
libavcodec/vvc/dsp_template.c | 20 ++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/libavcodec/vvc/dsp.h b/libavcodec/vvc/dsp.h
index 25b7755109..e9ef9f5b25 100644
--- a/libavcodec/vvc/dsp.h
+++ b/libavcodec/vvc/dsp.h
@@ -127,6 +127,8 @@ typedef struct VVCItxDSPContext {
void (*itx[VVC_N_TX_TYPE][VVC_N_TX_SIZE])(int *coeffs, ptrdiff_t step,
size_t nz);
void (*transform_bdpcm)(int *coeffs, int width, int height, int vertical,
int log2_transform_range);
+
+ void (*adaptive_color_transform)(int *y, int *u, int *v, int width, int
height);
} VVCItxDSPContext;
typedef struct VVCLMCSDSPContext {
diff --git a/libavcodec/vvc/dsp_template.c b/libavcodec/vvc/dsp_template.c
index c6dc6e22a7..218a600cce 100644
--- a/libavcodec/vvc/dsp_template.c
+++ b/libavcodec/vvc/dsp_template.c
@@ -91,6 +91,24 @@ static void FUNC(transform_bdpcm)(int *coeffs, const int
width, const int height
}
}
+// 8.7.4.6 Residual modification process for blocks using colour space
conversion
+static void FUNC(adaptive_color_transform)(int *y, int *u, int *v, const int
width, const int height)
+{
+ const int size = width * height;
+ const int bits = BIT_DEPTH + 1;
+
+ for (int i = 0; i < size; i++) {
+ const int y0 = av_clip_intp2(y[i], bits);
+ const int cg = av_clip_intp2(u[i], bits);
+ const int co = av_clip_intp2(v[i], bits);
+ const int t = y0 - (cg >> 1);
+
+ y[i] = cg + t;
+ u[i] = t - (co >> 1);
+ v[i] = co + u[i];
+ }
+}
+
static void FUNC(ff_vvc_itx_dsp_init)(VVCItxDSPContext *const itx)
{
#define VVC_ITX(TYPE, type, s)
\
@@ -112,6 +130,8 @@ static void FUNC(ff_vvc_itx_dsp_init)(VVCItxDSPContext
*const itx)
VVC_ITX_COMMON(DCT8, dct8)
VVC_ITX_COMMON(DST7, dst7)
+ itx->adaptive_color_transform = FUNC(adaptive_color_transform);
+
#undef VVC_ITX
#undef VVC_ITX_COMMON
}
--
2.44.0.windows.1
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