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Use YUV colorspaces instead of a global YUV conversion mode

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Fixes https://github.com/libsdl-org/SDL/issues/8669
This commit is contained in:
Sam Lantinga
2024-02-03 07:05:32 -08:00
parent 9e76f23561
commit 50a805cdd1
22 changed files with 361 additions and 327 deletions
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39
test/testyuv_cvt.c
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@@ -14,14 +14,41 @@
#include "testyuv_cvt.h"
#define YUV_SD_THRESHOLD 576
static YUV_CONVERSION_MODE YUV_ConversionMode = YUV_CONVERSION_BT601;
void SetYUVConversionMode(YUV_CONVERSION_MODE mode)
{
YUV_ConversionMode = mode;
}
YUV_CONVERSION_MODE GetYUVConversionMode(void)
{
return YUV_ConversionMode;
}
YUV_CONVERSION_MODE GetYUVConversionModeForResolution(int width, int height)
{
YUV_CONVERSION_MODE mode = GetYUVConversionMode();
if (mode == YUV_CONVERSION_AUTOMATIC) {
if (height <= YUV_SD_THRESHOLD) {
mode = YUV_CONVERSION_BT601;
} else {
mode = YUV_CONVERSION_BT709;
}
}
return mode;
}
static float clip3(float x, float y, float z)
{
return (z < x) ? x : ((z > y) ? y : z);
}
static void RGBtoYUV(const Uint8 *rgb, int *yuv, SDL_YUV_CONVERSION_MODE mode, int monochrome, int luminance)
static void RGBtoYUV(const Uint8 *rgb, int *yuv, YUV_CONVERSION_MODE mode, int monochrome, int luminance)
{
if (mode == SDL_YUV_CONVERSION_JPEG) {
if (mode == YUV_CONVERSION_JPEG) {
/* Full range YUV */
yuv[0] = (int)(0.299 * rgb[0] + 0.587 * rgb[1] + 0.114 * rgb[2]);
yuv[1] = (int)((rgb[2] - yuv[0]) * 0.565 + 128);
@@ -37,7 +64,7 @@ static void RGBtoYUV(const Uint8 *rgb, int *yuv, SDL_YUV_CONVERSION_MODE mode, i
*/
float S, Z, R, G, B, L, Kr, Kb, Y, U, V;
if (mode == SDL_YUV_CONVERSION_BT709) {
if (mode == YUV_CONVERSION_BT709) {
/* BT.709 */
Kr = 0.2126f;
Kb = 0.0722f;
@@ -75,7 +102,7 @@ static void RGBtoYUV(const Uint8 *rgb, int *yuv, SDL_YUV_CONVERSION_MODE mode, i
}
}
static void ConvertRGBtoPlanar2x2(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, SDL_YUV_CONVERSION_MODE mode, int monochrome, int luminance)
static void ConvertRGBtoPlanar2x2(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, YUV_CONVERSION_MODE mode, int monochrome, int luminance)
{
int x, y;
int yuv[4][3];
@@ -191,7 +218,7 @@ static void ConvertRGBtoPlanar2x2(Uint32 format, Uint8 *src, int pitch, Uint8 *o
}
}
static void ConvertRGBtoPacked4(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, SDL_YUV_CONVERSION_MODE mode, int monochrome, int luminance)
static void ConvertRGBtoPacked4(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, YUV_CONVERSION_MODE mode, int monochrome, int luminance)
{
int x, y;
int yuv[2][3];
@@ -261,7 +288,7 @@ static void ConvertRGBtoPacked4(Uint32 format, Uint8 *src, int pitch, Uint8 *out
}
}
SDL_bool ConvertRGBtoYUV(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, SDL_YUV_CONVERSION_MODE mode, int monochrome, int luminance)
SDL_bool ConvertRGBtoYUV(Uint32 format, Uint8 *src, int pitch, Uint8 *out, int w, int h, YUV_CONVERSION_MODE mode, int monochrome, int luminance)
{
switch (format) {
case SDL_PIXELFORMAT_YV12: