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avcodec/vvc/dsp: add adaptive_color_transform

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See 8.7.4.6 Residual modification process for blocks using colour space conversion

Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
This commit is contained in:
Wu Jianhua
2025-05-14 21:40:24 +08:00
committed by Nuo Mi
parent 8bdad76c00
commit fef573f30b
2 changed files with 22 additions and 0 deletions
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2
libavcodec/vvc/dsp.h
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@ -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 {

20
libavcodec/vvc/dsp_template.c
View File

@ -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
}