dsputil: Move thirdpel-related bits into their own context

1 files changed, 59 insertions, 0 deletions

diff --git a/libavcodec/tpeldsp.h b/libavcodec/tpeldsp.h
new file mode 100644
index 0000000000..9c67d60850
--- /dev/null
+++ b/libavcodec/tpeldsp.h
@@ -0,0 +1,59 @@
+/*
+ * thirdpel DSP functions
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * thirdpel DSP functions
+ */
+
+#ifndef AVCODEC_TPELDSP_H
+#define AVCODEC_TPELDSP_H
+
+#include <stdint.h>
+
+/* add and put pixel (decoding) */
+// blocksizes for hpel_pixels_func are 8x4,8x8 16x8 16x16
+// h for hpel_pixels_func is limited to {width/2, width} but never larger
+// than 16 and never smaller than 4
+typedef void (*tpel_mc_func)(uint8_t *block /* align width (8 or 16) */,
+                             const uint8_t *pixels /* align 1 */,
+                             int line_size, int w, int h);
+
+/**
+ * thirdpel DSP context
+ */
+typedef struct TpelDSPContext {
+    /**
+     * Thirdpel motion compensation with rounding (a + b + 1) >> 1.
+     * this is an array[12] of motion compensation functions for the
+     * 9 thirdpel positions<br>
+     * *pixels_tab[xthirdpel + 4 * ythirdpel]
+     * @param block destination where the result is stored
+     * @param pixels source
+     * @param line_size number of bytes in a horizontal line of block
+     * @param h height
+     */
+    tpel_mc_func put_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
+    tpel_mc_func avg_tpel_pixels_tab[11]; // FIXME individual func ptr per width?
+} TpelDSPContext;
+
+void ff_tpeldsp_init(TpelDSPContext *c);
+
+#endif /* AVCODEC_TPELDSP_H */