dsputil: Split off HuffYUV decoding bits into their own context

Also shorten HuffYUV context member names to avoid clutter.

1 files changed, 57 insertions, 0 deletions

diff --git a/libavcodec/ppc/huffyuvdsp_altivec.c b/libavcodec/ppc/huffyuvdsp_altivec.c
new file mode 100644
index 0000000000..7ff871be79
--- /dev/null
+++ b/libavcodec/ppc/huffyuvdsp_altivec.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2002 Brian Foley
+ * Copyright (c) 2002 Dieter Shirley
+ * Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
+ *
+ * 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 "config.h"
+#if HAVE_ALTIVEC_H
+#include <altivec.h>
+#endif
+
+#include "libavutil/attributes.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#include "libavcodec/huffyuvdsp.h"
+
+#if HAVE_ALTIVEC
+static void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w)
+{
+    register int i;
+    register vector unsigned char vdst, vsrc;
+
+    /* dst and src are 16 bytes-aligned (guaranteed). */
+    for (i = 0; i + 15 < w; i += 16) {
+        vdst = vec_ld(i, (unsigned char *) dst);
+        vsrc = vec_ld(i, (unsigned char *) src);
+        vdst = vec_add(vsrc, vdst);
+        vec_st(vdst, i, (unsigned char *) dst);
+    }
+    /* If w is not a multiple of 16. */
+    for (; i < w; i++)
+        dst[i] = src[i];
+}
+#endif /* HAVE_ALTIVEC */
+
+av_cold void ff_huffyuvdsp_init_ppc(HuffYUVDSPContext *c)
+{
+#if HAVE_ALTIVEC
+    c->add_bytes = add_bytes_altivec;
+#endif /* HAVE_ALTIVEC */
+}