McSinyx
/
megapixels
mirror of https://git.sr.ht/~martijnbraam/megapixels
1
1
Fork 0
Code Issues Releases Wiki Activity

Implement color decoding in YUV

This commit is contained in:
Martijn Braam 2020-11-09 15:48:51 +01:00
parent cd7cd8b177
commit 78d9e03f38
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
quickpreview.c
View File

@ -84,7 +84,7 @@ void quick_debayer(const uint8_t *source, uint8_t *destination,
} }
// YUV format to RGB, currently only extracts the Y channel for a grayscale preview // YUV 4:2:2 to RGB conversion
void quick_yuv2rgb(const uint8_t *source, uint8_t *destination, void quick_yuv2rgb(const uint8_t *source, uint8_t *destination,
uint32_t pix_fmt, int width, int height, int skip) uint32_t pix_fmt, int width, int height, int skip)
{ {
@ -109,13 +109,13 @@ void quick_yuv2rgb(const uint8_t *source, uint8_t *destination,
V = source[i+3]; V = source[i+3];
break; break;
} }
destination[j] = Y1; destination[j] = 1.164f * Y1 + 1.596f * (V - 128);
destination[j+1] = Y1; destination[j+1] = 1.164f * Y1 - 0.813f * (V - 128) - 0.391f * (U - 128);
destination[j+2] = Y1; destination[j+2] = 1.164f * Y1 + 2.018f * (U - 128);
j += 3; j += 3;
destination[j] = Y2; destination[j] = 1.164f * Y2 + 1.596f * (V - 128);
destination[j+1] = Y2; destination[j+1] = 1.164f * Y2 - 0.813f * (V - 128) - 0.391f * (U - 128);
destination[j+2] = Y2; destination[j+2] = 1.164f * Y2 + 2.018f * (U - 128);
j += 3; j += 3;
i += pixelsize * skip * 2; i += pixelsize * skip * 2;