dsputil: Split audio operations off into a separate context

1 files changed, 72 insertions, 0 deletions

diff --git a/libavcodec/ppc/audiodsp.c b/libavcodec/ppc/audiodsp.c
new file mode 100644
index 0000000000..36506ce902
--- /dev/null
+++ b/libavcodec/ppc/audiodsp.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2007 Luca Barbato <lu_zero@gentoo.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
+ */
+
+/**
+ * @file
+ * miscellaneous audio operations
+ */
+
+#include "config.h"
+#if HAVE_ALTIVEC_H
+#include <altivec.h>
+#endif
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/ppc/cpu.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#include "libavcodec/audiodsp.h"
+
+#if HAVE_ALTIVEC
+
+static int32_t scalarproduct_int16_altivec(const int16_t *v1, const int16_t *v2,
+                                           int order)
+{
+    int i;
+    LOAD_ZERO;
+    register vec_s16 vec1;
+    register vec_s32 res = vec_splat_s32(0), t;
+    int32_t ires;
+
+    for (i = 0; i < order; i += 8) {
+        vec1 = vec_unaligned_load(v1);
+        t    = vec_msum(vec1, vec_ld(0, v2), zero_s32v);
+        res  = vec_sums(t, res);
+        v1  += 8;
+        v2  += 8;
+    }
+    res = vec_splat(res, 3);
+    vec_ste(res, 0, &ires);
+
+    return ires;
+}
+
+#endif /* HAVE_ALTIVEC */
+
+av_cold void ff_audiodsp_init_ppc(AudioDSPContext *c)
+{
+#if HAVE_ALTIVEC
+    if (!PPC_ALTIVEC(av_get_cpu_flags()))
+        return;
+
+    c->scalarproduct_int16 = scalarproduct_int16_altivec;
+#endif /* HAVE_ALTIVEC */
+}