early-access version 1432

externals/ffmpeg/libavcodec/exrdsp.c

@@ -0,0 +1,56 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC
+ *
+ * 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
+ */
+
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "exrdsp.h"
+#include "config.h"
+
+static void reorder_pixels_scalar(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
+{
+    const uint8_t *t1 = src;
+    int half_size     = size / 2;
+    const uint8_t *t2 = src + half_size;
+    uint8_t *s        = dst;
+    int i;
+
+    for (i = 0; i < half_size; i++) {
+        *(s++) = *(t1++);
+        *(s++) = *(t2++);
+    }
+}
+
+static void predictor_scalar(uint8_t *src, ptrdiff_t size)
+{
+    ptrdiff_t i;
+
+    for (i = 1; i < size; i++)
+        src[i] += src[i-1] - 128;
+}
+
+av_cold void ff_exrdsp_init(ExrDSPContext *c)
+{
+    c->reorder_pixels   = reorder_pixels_scalar;
+    c->predictor        = predictor_scalar;
+
+    if (ARCH_X86)
+        ff_exrdsp_init_x86(c);
+}