dsputil: Split bswap*_buf() off into a separate context

1 files changed, 56 insertions, 0 deletions

diff --git a/libavcodec/bswapdsp.c b/libavcodec/bswapdsp.c
new file mode 100644
index 0000000000..6700cfd980
--- /dev/null
+++ b/libavcodec/bswapdsp.c
@@ -0,0 +1,56 @@
+/*
+ * 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 <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/bswap.h"
+#include "bswapdsp.h"
+
+static void bswap_buf(uint32_t *dst, const uint32_t *src, int w)
+{
+    int i;
+
+    for (i = 0; i + 8 <= w; i += 8) {
+        dst[i + 0] = av_bswap32(src[i + 0]);
+        dst[i + 1] = av_bswap32(src[i + 1]);
+        dst[i + 2] = av_bswap32(src[i + 2]);
+        dst[i + 3] = av_bswap32(src[i + 3]);
+        dst[i + 4] = av_bswap32(src[i + 4]);
+        dst[i + 5] = av_bswap32(src[i + 5]);
+        dst[i + 6] = av_bswap32(src[i + 6]);
+        dst[i + 7] = av_bswap32(src[i + 7]);
+    }
+    for (; i < w; i++)
+        dst[i + 0] = av_bswap32(src[i + 0]);
+}
+
+static void bswap16_buf(uint16_t *dst, const uint16_t *src, int len)
+{
+    while (len--)
+        *dst++ = av_bswap16(*src++);
+}
+
+av_cold void ff_bswapdsp_init(BswapDSPContext *c)
+{
+    c->bswap_buf   = bswap_buf;
+    c->bswap16_buf = bswap16_buf;
+
+    if (ARCH_X86)
+        ff_bswapdsp_init_x86(c);
+}