rgb2rgb: rgb12tobgr12()

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/libswscale/rgb2rgb.c b/libswscale/rgb2rgb.c
index 0f07e57683..9fbb6cfd60 100644
--- a/libswscale/rgb2rgb.c
+++ b/libswscale/rgb2rgb.c
@@ -282,6 +282,19 @@ void rgb15tobgr15(const uint8_t *src, uint8_t *dst, int src_size)
     }
 }
 
+void rgb12tobgr12(const uint8_t *src, uint8_t *dst, int src_size)
+{
+    uint16_t *d = (uint16_t*)dst;
+    uint16_t *s = (uint16_t*)src;
+    int i;
+    int num_pixels = src_size >> 1;
+
+    for (i = 0; i < num_pixels; i++) {
+        unsigned rgb = s[i];
+        d[i] = (rgb << 8 | rgb & 0xF0 | rgb >> 8) & 0xFFF;
+    }
+}
+
 void bgr8torgb8(const uint8_t *src, uint8_t *dst, int src_size)
 {
     int i;