copy: add NV12 to NV12 plane copies

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/video_chroma/copy.c

@@ -348,6 +348,23 @@ static void SSE_CopyFromYv12(picture_t *dst,
     }
     asm volatile ("emms");
 }
+
+
+static void SSE_CopyFromNv12ToNv12(picture_t *dst,
+                             uint8_t *src[2], size_t src_pitch[2],
+                             unsigned width, unsigned height,
+                             copy_cache_t *cache, unsigned cpu)
+{
+    SSE_CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
+                  src[0], src_pitch[0],
+                  cache->buffer, cache->size,
+                  width, height, cpu);
+    SSE_CopyPlane(dst->p[1].p_pixels, dst->p[1].i_pitch,
+                  src[1], src_pitch[1],
+                  cache->buffer, cache->size,
+                  width, height/2, cpu);
+    asm volatile ("emms");
+}
 #undef COPY64
 #endif /* CAN_COMPILE_SSE2 */
 
@@ -400,6 +417,27 @@ void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
                 width/2, height/2);
 }
 
+void CopyFromNv12ToNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
+                  unsigned width, unsigned height,
+                  copy_cache_t *cache)
+{
+#ifdef CAN_COMPILE_SSE2
+    unsigned cpu = vlc_CPU();
+    if (vlc_CPU_SSE2())
+        return SSE_CopyFromNv12ToNv12(dst, src, src_pitch, width, height,
+                                cache, cpu);
+#else
+    (void) cache;
+#endif
+
+    CopyPlane(dst->p[0].p_pixels, dst->p[0].i_pitch,
+              src[0], src_pitch[0],
+              width, height);
+    CopyPlane(dst->p[1].p_pixels, dst->p[1].i_pitch,
+              src[1], src_pitch[1],
+              width, height/2);
+}
+
 void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
                   unsigned width, unsigned height,
                   copy_cache_t *cache)

modules/video_chroma/copy.h

@@ -34,11 +34,17 @@ typedef struct {
 int  CopyInitCache(copy_cache_t *cache, unsigned width);
 void CopyCleanCache(copy_cache_t *cache);
 
+/* Copy planes from NV12 to YV12 */
 void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
                   unsigned width, unsigned height,
                   copy_cache_t *cache);
+/* Copy planes from YV12 to YV12 */
 void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
                   unsigned width, unsigned height,
                   copy_cache_t *cache);
 
+void CopyFromNv12ToNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
+                        unsigned width, unsigned height,
+                        copy_cache_t *cache);
+
 #endif