dsputil: Split off HuffYUV encoding bits into their own context

Also shorten HuffYUV context member names to avoid clutter.

1 files changed, 41 insertions, 0 deletions

diff --git a/libavcodec/huffyuvencdsp.h b/libavcodec/huffyuvencdsp.h
new file mode 100644
index 0000000000..603c36f7af
--- /dev/null
+++ b/libavcodec/huffyuvencdsp.h
@@ -0,0 +1,41 @@
+/*
+ * 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
+ */
+
+#ifndef AVCODEC_HUFFYUVENCDSP_H
+#define AVCODEC_HUFFYUVENCDSP_H
+
+#include <stdint.h>
+
+typedef struct HuffYUVEncDSPContext {
+    void (*diff_bytes)(uint8_t *dst /* align 16 */,
+                       uint8_t *src1 /* align 16 */,
+                       uint8_t *src2 /* align 1 */,
+                       int w);
+    /**
+     * Subtract HuffYUV's variant of median prediction.
+     * Note, this might read from src1[-1], src2[-1].
+     */
+    void (*sub_hfyu_median_pred)(uint8_t *dst, const uint8_t *src1,
+                                 const uint8_t *src2, int w,
+                                 int *left, int *left_top);
+} HuffYUVEncDSPContext;
+
+void ff_huffyuvencdsp_init(HuffYUVEncDSPContext *c);
+void ff_huffyuvencdsp_init_x86(HuffYUVEncDSPContext *c);
+
+#endif /* AVCODEC_HUFFYUVENCDSP_H */