2 * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavcodec/fmtconvert.h"
23 #include "libavutil/ppc/util_altivec.h"
24 #include "dsputil_altivec.h"
26 static void int32_to_float_fmul_scalar_altivec(float *dst, const int *src,
34 vector float src1, src2, dst1, dst2, mul_v, zero;
36 zero = (vector float)vec_splat_u32(0);
38 mul_v = vec_splat(mul_u.v, 0);
40 for (i = 0; i < len; i += 8) {
41 src1 = vec_ctf(vec_ld(0, src+i), 0);
42 src2 = vec_ctf(vec_ld(16, src+i), 0);
43 dst1 = vec_madd(src1, mul_v, zero);
44 dst2 = vec_madd(src2, mul_v, zero);
45 vec_st(dst1, 0, dst+i);
46 vec_st(dst2, 16, dst+i);
51 static vector signed short float_to_int16_one_altivec(const float *src)
53 vector float s0 = vec_ld(0, src);
54 vector float s1 = vec_ld(16, src);
55 vector signed int t0 = vec_cts(s0, 0);
56 vector signed int t1 = vec_cts(s1, 0);
57 return vec_packs(t0,t1);
60 static void float_to_int16_altivec(int16_t *dst, const float *src, long len)
63 vector signed short d0, d1, d;
64 vector unsigned char align;
65 if (((long)dst) & 15) { //FIXME
66 for (i = 0; i < len - 7; i += 8) {
67 d0 = vec_ld(0, dst+i);
68 d = float_to_int16_one_altivec(src + i);
69 d1 = vec_ld(15, dst+i);
70 d1 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
71 align = vec_lvsr(0, dst + i);
72 d0 = vec_perm(d1, d, align);
73 d1 = vec_perm(d, d1, align);
74 vec_st(d0, 0, dst + i);
75 vec_st(d1, 15, dst + i);
78 for (i = 0; i < len - 7; i += 8) {
79 d = float_to_int16_one_altivec(src + i);
80 vec_st(d, 0, dst + i);
85 static void float_to_int16_interleave_altivec(int16_t *dst, const float **src,
86 long len, int channels)
89 vector signed short d0, d1, d2, c0, c1, t0, t1;
90 vector unsigned char align;
93 float_to_int16_altivec(dst, src[0], len);
96 if (((long)dst) & 15) {
97 for (i = 0; i < len - 7; i += 8) {
98 d0 = vec_ld(0, dst + i);
99 t0 = float_to_int16_one_altivec(src[0] + i);
100 d1 = vec_ld(31, dst + i);
101 t1 = float_to_int16_one_altivec(src[1] + i);
102 c0 = vec_mergeh(t0, t1);
103 c1 = vec_mergel(t0, t1);
104 d2 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
105 align = vec_lvsr(0, dst + i);
106 d0 = vec_perm(d2, c0, align);
107 d1 = vec_perm(c0, c1, align);
108 vec_st(d0, 0, dst + i);
109 d0 = vec_perm(c1, d2, align);
110 vec_st(d1, 15, dst + i);
111 vec_st(d0, 31, dst + i);
115 for (i = 0; i < len - 7; i += 8) {
116 t0 = float_to_int16_one_altivec(src[0] + i);
117 t1 = float_to_int16_one_altivec(src[1] + i);
118 d0 = vec_mergeh(t0, t1);
119 d1 = vec_mergel(t0, t1);
120 vec_st(d0, 0, dst + i);
121 vec_st(d1, 16, dst + i);
126 DECLARE_ALIGNED(16, int16_t, tmp)[len];
128 for (c = 0; c < channels; c++) {
129 float_to_int16_altivec(tmp, src[c], len);
130 for (i = 0, j = c; i < len; i++, j+=channels)
137 void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx)
139 c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
140 if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
141 c->float_to_int16 = float_to_int16_altivec;
142 c->float_to_int16_interleave = float_to_int16_interleave_altivec;