1 files changed, 49 insertions, 0 deletions
diff --git a/libavcodec/libaom.c b/libavcodec/libaom.c
new file mode 100644
index 0000000000..0befaaa530
--- /dev/null
+++ b/libavcodec/libaom.c
@@ -0,0 +1,49 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * AOM common functions
+ */
+
+#include "libavutil/pixdesc.h"
+#include "libaom.h"
+
+void ff_aom_image_copy_16_to_8(AVFrame *pic, struct aom_image *img)
+{
+    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pic->format);
+    int i;
+
+    for (i = 0; i < desc->nb_components; i++) {
+        int w = img->d_w;
+        int h = img->d_h;
+        int x, y;
+
+        if (i) {
+            w = (w + img->x_chroma_shift) >> img->x_chroma_shift;
+            h = (h + img->y_chroma_shift) >> img->y_chroma_shift;
+        }
+
+        for (y = 0; y < h; y++) {
+            uint16_t *src = (uint16_t *)(img->planes[i] + y * img->stride[i]);
+            uint8_t *dst = pic->data[i] + y * pic->linesize[i];
+            for (x = 0; x < w; x++)
+                *dst++ = *src++;
+        }
+    }
+}