dsputil: Split off *_8x8basis to a separate context

1 files changed, 64 insertions, 0 deletions

diff --git a/libavcodec/mpegvideoencdsp.c b/libavcodec/mpegvideoencdsp.c
new file mode 100644
index 0000000000..16ff1f2db4
--- /dev/null
+++ b/libavcodec/mpegvideoencdsp.c
@@ -0,0 +1,64 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include "config.h"
+#include "libavutil/attributes.h"
+#include "avcodec.h"
+#include "mpegvideoencdsp.h"
+
+static int try_8x8basis_c(int16_t rem[64], int16_t weight[64],
+                          int16_t basis[64], int scale)
+{
+    int i;
+    unsigned int sum = 0;
+
+    for (i = 0; i < 8 * 8; i++) {
+        int b = rem[i] + ((basis[i] * scale +
+                           (1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
+                          (BASIS_SHIFT - RECON_SHIFT));
+        int w = weight[i];
+        b >>= RECON_SHIFT;
+        assert(-512 < b && b < 512);
+
+        sum += (w * b) * (w * b) >> 4;
+    }
+    return sum >> 2;
+}
+
+static void add_8x8basis_c(int16_t rem[64], int16_t basis[64], int scale)
+{
+    int i;
+
+    for (i = 0; i < 8 * 8; i++)
+        rem[i] += (basis[i] * scale +
+                   (1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
+                  (BASIS_SHIFT - RECON_SHIFT);
+}
+
+av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c,
+                                     AVCodecContext *avctx)
+{
+    c->try_8x8basis = try_8x8basis_c;
+    c->add_8x8basis = add_8x8basis_c;
+
+    if (ARCH_X86)
+        ff_mpegvideoencdsp_init_x86(c, avctx);
+}