dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-13 06:24:27 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

mv SharpYuvEstimate420Risk to extras/

Browse Source 
There's no need for this in libsharpyuv currently. This avoids an ABI
bump and library size increase.

Change-Id: I3e4c79052fdb4d628a2d36491547233dd0b6dc34
This commit is contained in:
James Zern
2024-01-11 18:02:16 -08:00
parent e78e924f84
commit 5efd6300dc
14 changed files with 207 additions and 217 deletions
Download Patch File Download Diff File Expand all files Collapse all files

105
sharpyuv/sharpyuv.c
View File

@ -23,7 +23,6 @@
#include "sharpyuv/sharpyuv_cpu.h"
#include "sharpyuv/sharpyuv_dsp.h"
#include "sharpyuv/sharpyuv_gamma.h"
#include "sharpyuv/sharpyuv_risk_table.h"
//------------------------------------------------------------------------------
@ -436,6 +435,8 @@ static int DoSharpArgbToYuv(const uint8_t* r_ptr, const uint8_t* g_ptr,
return ok;
}
#undef SAFE_ALLOC
#if defined(WEBP_USE_THREAD) && !defined(_WIN32)
#include <pthread.h> // NOLINT
@ -571,105 +572,3 @@ int SharpYuvConvertWithOptions(const void* r_ptr, const void* g_ptr,
}
//------------------------------------------------------------------------------
// 420 risk metric
static int DoEstimateRisk(const uint8_t* r_ptr, const uint8_t* g_ptr,
const uint8_t* b_ptr, int rgb_step, int rgb_stride,
int rgb_bit_depth, int width, int height,
const SharpYuvOptions* options,
const uint8_t precomputed_scores_table[],
int precomputed_scores_table_sampling,
float* score_out) {
const int sampling3 = precomputed_scores_table_sampling *
precomputed_scores_table_sampling *
precomputed_scores_table_sampling;
const int kNoiseLevel = 4;
double total_score = 0;
double count = 0;
// Rows of indices in
uint16_t* row1 = SAFE_ALLOC(width, 1, uint16_t);
uint16_t* row2 = SAFE_ALLOC(width, 1, uint16_t);
uint16_t* tmp;
int i, j;
if (row1 == NULL || row2 == NULL) {
free(row1);
free(row2);
return 0;
}
// Convert the first row ahead.
SharpYuvRowToYuvSharpnessIndex(r_ptr, g_ptr, b_ptr, rgb_step, rgb_bit_depth,
width, row2, options->yuv_matrix,
precomputed_scores_table_sampling);
for (j = 1; j < height; ++j) {
r_ptr += rgb_stride;
g_ptr += rgb_stride;
b_ptr += rgb_stride;
// Swap row 1 and row 2.
tmp = row1;
row1 = row2;
row2 = tmp;
// Convert the row below.
SharpYuvRowToYuvSharpnessIndex(r_ptr, g_ptr, b_ptr, rgb_step, rgb_bit_depth,
width, row2, options->yuv_matrix,
precomputed_scores_table_sampling);
for (i = 0; i < width - 1; ++i) {
const int idx0 = row1[i + 0];
const int idx1 = row1[i + 1];
const int idx2 = row2[i + 0];
const int score = precomputed_scores_table[idx0 + sampling3 * idx1] +
precomputed_scores_table[idx0 + sampling3 * idx2] +
precomputed_scores_table[idx1 + sampling3 * idx2];
if (score > kNoiseLevel) {
total_score += score;
count += 1.0;
}
}
}
if (count > 0.) total_score /= count;
// If less than 1% of pixels were evaluated -> below noise level.
if (100. * count / (width * height) < 1.) total_score = 0.;
// Rescale to [0:100]
total_score = (total_score > 25.) ? 100. : total_score * 100. / 25.;
free(row1);
free(row2);
*score_out = (float)total_score;
return 1;
}
int SharpYuvEstimate420Risk(const void* r_ptr, const void* g_ptr,
const void* b_ptr, int rgb_step, int rgb_stride,
int rgb_bit_depth, int width, int height,
const SharpYuvOptions* options, float* score) {
if (width < 1 || height < 1 || width == INT_MAX || height == INT_MAX ||
r_ptr == NULL || g_ptr == NULL || b_ptr == NULL || options == NULL ||
score == NULL) {
return 0;
}
if (rgb_bit_depth != 8) {
return 0;
}
if (width <= 4 || height <= 4) {
*score = 0.0f; // too small, no real risk.
return 1;
}
// The address of the function pointer is used to avoid a read race.
SharpYuvInit((VP8CPUInfo)&SharpYuvGetCPUInfo);
return DoEstimateRisk(
(const uint8_t*)r_ptr, (const uint8_t*)g_ptr, (const uint8_t*)b_ptr,
rgb_step, rgb_stride, rgb_bit_depth, width, height, options,
kSharpYuvPrecomputedRisk, kSharpYuvPrecomputedRiskYuvSampling, score);
}
#undef SAFE_ALLOC
//------------------------------------------------------------------------------