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Add YUV420 riskiness metric.

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Basic version for 8 bit only and C only (no simd).

Hidden behind a compile flag because the precompiled table is
fairly large (114kiB) and more than triples the size of the library.

Change-Id: I165c78e863df6a17b32f578bdbffe3adda9ac1d0
This commit is contained in:
Maryla
2023-11-21 18:14:41 +01:00
parent 89c5b91746
commit d7a0506dcc
10 changed files with 6450 additions and 5 deletions
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66
sharpyuv/sharpyuv_dsp.c
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@ -16,7 +16,9 @@
#include <assert.h>
#include <stdlib.h>
#include "sharpyuv/sharpyuv.h"
#include "sharpyuv/sharpyuv_cpu.h"
#include "src/webp/types.h"
//-----------------------------------------------------------------------------
@ -62,6 +64,58 @@ static void SharpYuvFilterRow_C(const int16_t* A, const int16_t* B, int len,
}
#endif // !WEBP_NEON_OMIT_C_CODE
#define YUV_FIX 16 // fixed-point precision for RGB->YUV
static const int kYuvHalf = 1 << (YUV_FIX - 1);
// Maps a value in [0, (256 << YUV_FIX) - 1] to [0,
// precomputed_scores_table_sampling - 1]. It is important that the extremal
// values are preserved and 1:1 mapped:
// ConvertValue(0) = 0
// ConvertValue((256 << 16) - 1) = rgb_sampling_size - 1
static int SharpYuvConvertValueToSampledIdx(int v, int rgb_sampling_size) {
v = (v + kYuvHalf) >> YUV_FIX;
v = (v < 0) ? 0 : (v > 255) ? 255 : v;
return (v * (rgb_sampling_size - 1)) / 255;
}
#undef YUV_FIX
static int SharpYuvConvertToYuvSharpnessIndex(
int r, int g, int b, const SharpYuvConversionMatrix* matrix,
int precomputed_scores_table_sampling) {
const int y = SharpYuvConvertValueToSampledIdx(
matrix->rgb_to_y[0] * r + matrix->rgb_to_y[1] * g +
matrix->rgb_to_y[2] * b + matrix->rgb_to_y[3],
precomputed_scores_table_sampling);
const int u = SharpYuvConvertValueToSampledIdx(
matrix->rgb_to_u[0] * r + matrix->rgb_to_u[1] * g +
matrix->rgb_to_u[2] * b + matrix->rgb_to_u[3],
precomputed_scores_table_sampling);
const int v = SharpYuvConvertValueToSampledIdx(
matrix->rgb_to_v[0] * r + matrix->rgb_to_v[1] * g +
matrix->rgb_to_v[2] * b + matrix->rgb_to_v[3],
precomputed_scores_table_sampling);
return y + u * precomputed_scores_table_sampling +
v * precomputed_scores_table_sampling *
precomputed_scores_table_sampling;
}
static void SharpYuvRowToYuvSharpnessIndex_C(
const uint8_t* r_ptr, const uint8_t* g_ptr, const uint8_t* b_ptr,
int rgb_step, int rgb_bit_depth, int width, uint16_t* dst,
const SharpYuvConversionMatrix* matrix,
int precomputed_scores_table_sampling) {
int i;
assert(rgb_bit_depth == 8);
(void)rgb_bit_depth; // Unused for now.
for (i = 0; i < width;
++i, r_ptr += rgb_step, g_ptr += rgb_step, b_ptr += rgb_step) {
dst[i] =
SharpYuvConvertToYuvSharpnessIndex(r_ptr[0], g_ptr[0], b_ptr[0], matrix,
precomputed_scores_table_sampling);
}
}
//-----------------------------------------------------------------------------
uint64_t (*SharpYuvUpdateY)(const uint16_t* src, const uint16_t* ref,
@ -69,8 +123,14 @@ uint64_t (*SharpYuvUpdateY)(const uint16_t* src, const uint16_t* ref,
void (*SharpYuvUpdateRGB)(const int16_t* src, const int16_t* ref, int16_t* dst,
int len);
void (*SharpYuvFilterRow)(const int16_t* A, const int16_t* B, int len,
const uint16_t* best_y, uint16_t* out,
int bit_depth);
const uint16_t* best_y, uint16_t* out, int bit_depth);
void (*SharpYuvRowToYuvSharpnessIndex)(const uint8_t* r_ptr,
const uint8_t* g_ptr,
const uint8_t* b_ptr, int rgb_step,
int rgb_bit_depth, int width,
uint16_t* dst,
const SharpYuvConversionMatrix* matrix,
int precomputed_scores_table_sampling);
extern VP8CPUInfo SharpYuvGetCPUInfo;
extern void InitSharpYuvSSE2(void);
@ -82,6 +142,8 @@ void SharpYuvInitDsp(void) {
SharpYuvUpdateRGB = SharpYuvUpdateRGB_C;
SharpYuvFilterRow = SharpYuvFilterRow_C;
#endif
// There is only a C version for now so always include it.
SharpYuvRowToYuvSharpnessIndex = SharpYuvRowToYuvSharpnessIndex_C;
if (SharpYuvGetCPUInfo != NULL) {
#if defined(WEBP_HAVE_SSE2)