making act segmenter

1 files changed, 166 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/ppc/fmtconvert_altivec.c b/ffmpeg/libavcodec/ppc/fmtconvert_altivec.c
new file mode 100644
index 0000000..b29c7d4
--- /dev/null
+++ b/ffmpeg/libavcodec/ppc/fmtconvert_altivec.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/fmtconvert.h"
+
+#include "libavutil/ppc/util_altivec.h"
+#include "libavutil/attributes.h"
+#include "libavutil/mem.h"
+#include "dsputil_altivec.h"
+
+static void int32_to_float_fmul_scalar_altivec(float *dst, const int *src,
+                                               float mul, int len)
+{
+    union {
+        vector float v;
+        float s[4];
+    } mul_u;
+    int i;
+    vector float src1, src2, dst1, dst2, mul_v, zero;
+
+    zero = (vector float)vec_splat_u32(0);
+    mul_u.s[0] = mul;
+    mul_v = vec_splat(mul_u.v, 0);
+
+    for (i = 0; i < len; i += 8) {
+        src1 = vec_ctf(vec_ld(0,  src+i), 0);
+        src2 = vec_ctf(vec_ld(16, src+i), 0);
+        dst1 = vec_madd(src1, mul_v, zero);
+        dst2 = vec_madd(src2, mul_v, zero);
+        vec_st(dst1,  0, dst+i);
+        vec_st(dst2, 16, dst+i);
+    }
+}
+
+
+static vector signed short float_to_int16_one_altivec(const float *src)
+{
+    vector float s0 = vec_ld(0, src);
+    vector float s1 = vec_ld(16, src);
+    vector signed int t0 = vec_cts(s0, 0);
+    vector signed int t1 = vec_cts(s1, 0);
+    return vec_packs(t0,t1);
+}
+
+static void float_to_int16_altivec(int16_t *dst, const float *src, long len)
+{
+    int i;
+    vector signed short d0, d1, d;
+    vector unsigned char align;
+    if (((long)dst) & 15) { //FIXME
+        for (i = 0; i < len - 7; i += 8) {
+            d0 = vec_ld(0, dst+i);
+            d  = float_to_int16_one_altivec(src + i);
+            d1 = vec_ld(15, dst+i);
+            d1 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
+            align = vec_lvsr(0, dst + i);
+            d0 = vec_perm(d1, d, align);
+            d1 = vec_perm(d, d1, align);
+            vec_st(d0,  0, dst + i);
+            vec_st(d1, 15, dst + i);
+        }
+    } else {
+        for (i = 0; i < len - 7; i += 8) {
+            d = float_to_int16_one_altivec(src + i);
+            vec_st(d, 0, dst + i);
+        }
+    }
+}
+
+#define VSTE_INC(dst, v, elem, inc) do {                \
+        vector signed short s = vec_splat(v, elem);     \
+        vec_ste(s, 0, dst);                             \
+        dst += inc;                                     \
+    } while (0)
+
+static void float_to_int16_stride_altivec(int16_t *dst, const float *src,
+                                          long len, int stride)
+{
+    int i;
+    vector signed short d;
+
+    for (i = 0; i < len - 7; i += 8) {
+        d = float_to_int16_one_altivec(src + i);
+        VSTE_INC(dst, d, 0, stride);
+        VSTE_INC(dst, d, 1, stride);
+        VSTE_INC(dst, d, 2, stride);
+        VSTE_INC(dst, d, 3, stride);
+        VSTE_INC(dst, d, 4, stride);
+        VSTE_INC(dst, d, 5, stride);
+        VSTE_INC(dst, d, 6, stride);
+        VSTE_INC(dst, d, 7, stride);
+    }
+}
+
+static void float_to_int16_interleave_altivec(int16_t *dst, const float **src,
+                                              long len, int channels)
+{
+    int i;
+    vector signed short d0, d1, d2, c0, c1, t0, t1;
+    vector unsigned char align;
+
+    if (channels == 1)
+        float_to_int16_altivec(dst, src[0], len);
+    else {
+        if (channels == 2) {
+            if (((long)dst) & 15) {
+                for (i = 0; i < len - 7; i += 8) {
+                    d0 = vec_ld(0,  dst + i);
+                    t0 = float_to_int16_one_altivec(src[0] + i);
+                    d1 = vec_ld(31, dst + i);
+                    t1 = float_to_int16_one_altivec(src[1] + i);
+                    c0 = vec_mergeh(t0, t1);
+                    c1 = vec_mergel(t0, t1);
+                    d2 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
+                    align = vec_lvsr(0, dst + i);
+                    d0 = vec_perm(d2, c0, align);
+                    d1 = vec_perm(c0, c1, align);
+                    vec_st(d0,  0, dst + i);
+                    d0 = vec_perm(c1, d2, align);
+                    vec_st(d1, 15, dst + i);
+                    vec_st(d0, 31, dst + i);
+                    dst += 8;
+                }
+            } else {
+                for (i = 0; i < len - 7; i += 8) {
+                    t0 = float_to_int16_one_altivec(src[0] + i);
+                    t1 = float_to_int16_one_altivec(src[1] + i);
+                    d0 = vec_mergeh(t0, t1);
+                    d1 = vec_mergel(t0, t1);
+                    vec_st(d0,  0, dst + i);
+                    vec_st(d1, 16, dst + i);
+                    dst += 8;
+                }
+            }
+        } else {
+            for (i = 0; i < channels; i++)
+                float_to_int16_stride_altivec(dst + i, src[i], len, channels);
+        }
+    }
+}
+
+av_cold void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx)
+{
+    c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
+    if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
+        c->float_to_int16 = float_to_int16_altivec;
+        c->float_to_int16_interleave = float_to_int16_interleave_altivec;
+    }
+}