Moved out optimized VA nv12/yv12 copy functions from dxva2.

(cherry picked from commit 0777bcbfcb4ce001cfb74693f32d8bf0d451be15)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/codec/avcodec/Modules.am

@@ -10,6 +10,8 @@ libavcodec_plugin_la_SOURCES = \
 	chroma.c \
 	vaapi.c \
 	dxva2.c \
+	copy.c \
+	copy.h \
 	va.h \
 	$(NULL)
 if ENABLE_SOUT

modules/codec/avcodec/copy.h

+/*****************************************************************************
+ * copy.h: Fast YV12/NV12 copy
+ *****************************************************************************
+ * Copyright (C) 2009 Laurent Aimar
+ * $Id$
+ *
+ * Authors: Laurent Aimar <fenrir_AT_ videolan _DOT_ org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef _VLC_AVCODEC_COPY_H
+#define _VLC_AVCODEC_COPY_H 1
+
+typedef struct {
+    uint8_t *base;
+    uint8_t *buffer;
+    size_t  size;
+} copy_cache_t;
+
+int  CopyInitCache(copy_cache_t *cache, unsigned width);
+void CopyCleanCache(copy_cache_t *cache);
+
+void CopyFromNv12(picture_t *dst, uint8_t *src[2], size_t src_pitch[2],
+                  unsigned width, unsigned height,
+                  copy_cache_t *cache);
+void CopyFromYv12(picture_t *dst, uint8_t *src[3], size_t src_pitch[3],
+                  unsigned width, unsigned height,
+                  copy_cache_t *cache);
+
+#endif
+