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sharpyuv: add support for 10/12/16 bit rgb and 10/12 bit yuv.

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10bit+ input is truncated to 10bits for now.

Change-Id: I7ac00ca54c623d94c76ccd8954418e11095997d2
This commit is contained in:
Maryla
2022-05-17 15:02:31 +02:00
parent d3006f4b96
commit 93c5437115
9 changed files with 348 additions and 190 deletions
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15
sharpyuv/sharpyuv_csp.c
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@ -15,7 +15,7 @@
#include <math.h>
#include <string.h>
static int ToFixed16(float f) { return (int)round(f * (1 << 16)); }
static int ToFixed16(float f) { return (int)floor(f * (1 << 16) + 0.5f); }
void SharpYuvComputeConversionMatrix(const SharpYuvColorSpace* yuv_color_space,
SharpYuvConversionMatrix* matrix) {
@ -25,28 +25,27 @@ void SharpYuvComputeConversionMatrix(const SharpYuvColorSpace* yuv_color_space,
const float cr = 0.5f / (1.0f - kb);
const float cb = 0.5f / (1.0f - kr);
const int shift = yuv_color_space->bits - 8;
const int shift = yuv_color_space->bit_depth - 8;
const float denom = (float)((1 << yuv_color_space->bits) - 1);
const float denom = (float)((1 << yuv_color_space->bit_depth) - 1);
float scale_y = 1.0f;
float addY = 0.0f;
float add_y = 0.0f;
float scale_u = cr;
float scale_v = cb;
float add_uv = (float)(128 << shift);
assert(yuv_color_space->bits >= 8);
assert(yuv_color_space->bit_depth >= 8);
if (yuv_color_space->range == kSharpYuvRangeLimited) {
scale_y *= (219 << shift) / denom;
scale_u *= (224 << shift) / denom;
scale_v *= (224 << shift) / denom;
addY = (float)(16 << shift);
add_y = (float)(16 << shift);
}
matrix->rgb_to_y[0] = ToFixed16(kr * scale_y);
matrix->rgb_to_y[1] = ToFixed16(kg * scale_y);
matrix->rgb_to_y[2] = ToFixed16(kb * scale_y);
matrix->rgb_to_y[3] = ToFixed16(addY);
matrix->rgb_to_y[3] = ToFixed16(add_y);
matrix->rgb_to_u[0] = ToFixed16(-kr * scale_u);
matrix->rgb_to_u[1] = ToFixed16(-kg * scale_u);