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