swscale/rgb2rgb_template: Implement shuffle_bytes_0321_c and fix shuffle_bytes_2103_c on BE

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 19 insertions, 1 deletions

diff --git a/libswscale/rgb2rgb_template.c b/libswscale/rgb2rgb_template.c
index 70294aec97..5b446debfa 100644
--- a/libswscale/rgb2rgb_template.c
+++ b/libswscale/rgb2rgb_template.c
@@ -328,6 +328,20 @@ static inline void shuffle_bytes_2103_c(const uint8_t *src, uint8_t *dst,
     }
 }
 
+static inline void shuffle_bytes_0321_c(const uint8_t *src, uint8_t *dst,
+                                        int src_size)
+{
+    int idx          = 15  - src_size;
+    const uint8_t *s = src - idx;
+    uint8_t *d       = dst - idx;
+
+    for (; idx < 15; idx += 4) {
+        register unsigned v   = *(const uint32_t *)&s[idx], g = v & 0x00ff00ff;
+        v                    &= 0xff00ff00;
+        *(uint32_t *)&d[idx]  = (v >> 16) + g + (v << 16);
+    }
+}
+
 static inline void rgb24tobgr24_c(const uint8_t *src, uint8_t *dst, int src_size)
 {
     unsigned i;
@@ -929,7 +943,11 @@ static av_cold void rgb2rgb_init_c(void)
     rgb24to15          = rgb24to15_c;
     rgb24to16          = rgb24to16_c;
     rgb24tobgr24       = rgb24tobgr24_c;
-#if !HAVE_BIGENDIAN
+#if HAVE_BIGENDIAN
+    shuffle_bytes_0321 = shuffle_bytes_2103_c;
+    shuffle_bytes_2103 = shuffle_bytes_0321_c;
+#else
+    shuffle_bytes_0321 = shuffle_bytes_0321_c;
     shuffle_bytes_2103 = shuffle_bytes_2103_c;
 #endif
     rgb32tobgr16       = rgb32tobgr16_c;