rgb2rgb: rgb12tobgr12()

1 files changed, 13 insertions, 0 deletions

diff --git a/libswscale/rgb2rgb.c b/libswscale/rgb2rgb.c
index 5b84f89ec5..c6c1ebaaa5 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)
+{
+    int i;
+    int num_pixels = src_size >> 1;
+
+    for (i = 0; i < num_pixels; i++) {
+        unsigned br;
+        unsigned rgb = ((const uint16_t *)src)[i];
+        br = rgb & 0x0F0F;
+        ((uint16_t *)dst)[i] = (br >> 8) | (rgb & 0x00F0) | (br << 8);
+    }
+}
+
 void bgr8torgb8(const uint8_t *src, uint8_t *dst, int src_size)
 {
     int i;