Move vorbis_inverse_coupling from dsputil to vorbisdspcontext.

Conveniently (together with Justin's earlier patches), this makes
our vorbis decoder entirely independent of dsputil.

1 files changed, 62 insertions, 0 deletions

diff --git a/libavcodec/ppc/vorbisdsp_altivec.c b/libavcodec/ppc/vorbisdsp_altivec.c
new file mode 100644
index 0000000000..cd8bbb90fc
--- /dev/null
+++ b/libavcodec/ppc/vorbisdsp_altivec.c
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2006 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
+ */
+
+#include "config.h"
+#if HAVE_ALTIVEC_H
+#include <altivec.h>
+#endif
+#include "libavutil/cpu.h"
+#include "libavutil/ppc/types_altivec.h"
+#include "libavutil/ppc/util_altivec.h"
+#include "libavcodec/vorbisdsp.h"
+
+#if HAVE_ALTIVEC
+static void vorbis_inverse_coupling_altivec(float *mag, float *ang,
+                                            int blocksize)
+{
+    int i;
+    vector float m, a;
+    vector bool int t0, t1;
+    const vector unsigned int v_31 = //XXX
+        vec_add(vec_add(vec_splat_u32(15),vec_splat_u32(15)),vec_splat_u32(1));
+    for (i = 0; i < blocksize; i += 4) {
+        m = vec_ld(0, mag+i);
+        a = vec_ld(0, ang+i);
+        t0 = vec_cmple(m, (vector float)vec_splat_u32(0));
+        t1 = vec_cmple(a, (vector float)vec_splat_u32(0));
+        a = vec_xor(a, (vector float) vec_sl((vector unsigned int)t0, v_31));
+        t0 = (vector bool int)vec_and(a, t1);
+        t1 = (vector bool int)vec_andc(a, t1);
+        a = vec_sub(m, (vector float)t1);
+        m = vec_add(m, (vector float)t0);
+        vec_stl(a, 0, ang+i);
+        vec_stl(m, 0, mag+i);
+    }
+}
+#endif /* HAVE_ALTIVEC */
+
+void ff_vorbisdsp_init_ppc(VorbisDSPContext* c)
+{
+#if HAVE_ALTIVEC
+    if (av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC) {
+      c->vorbis_inverse_coupling = vorbis_inverse_coupling_altivec;
+    }
+#endif /* HAVE_ALTIVEC */
+}