move vp6_filter_diag4() to a new vp6dsp.c file and use it throught dsputil

Originally committed as revision 17111 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 59 insertions, 0 deletions

diff --git a/libavcodec/vp6dsp.c b/libavcodec/vp6dsp.c
new file mode 100644
index 0000000000..f4b7670d78
--- /dev/null
+++ b/libavcodec/vp6dsp.c
@@ -0,0 +1,59 @@
+/**
+ * @file libavcodec/vp6dsp.c
+ * VP6 DSP-oriented functions
+ *
+ * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * 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
+ */
+
+#include "libavutil/common.h"
+#include "dsputil.h"
+
+
+void ff_vp6_filter_diag4_c(uint8_t *dst, uint8_t *src, int stride,
+                           const int16_t *h_weights, const int16_t *v_weights)
+{
+    int x, y;
+    int tmp[8*11];
+    int *t = tmp;
+
+    src -= stride;
+
+    for (y=0; y<11; y++) {
+        for (x=0; x<8; x++) {
+            t[x] = av_clip_uint8((  src[x-1] * h_weights[0]
+                               + src[x  ] * h_weights[1]
+                               + src[x+1] * h_weights[2]
+                               + src[x+2] * h_weights[3] + 64) >> 7);
+        }
+        src += stride;
+        t += 8;
+    }
+
+    t = tmp + 8;
+    for (y=0; y<8; y++) {
+        for (x=0; x<8; x++) {
+            dst[x] = av_clip_uint8((  t[x-8 ] * v_weights[0]
+                                 + t[x   ] * v_weights[1]
+                                 + t[x+8 ] * v_weights[2]
+                                 + t[x+16] * v_weights[3] + 64) >> 7);
+        }
+        dst += stride;
+        t += 8;
+    }
+}