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1 | /* |
2 | * Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg 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. | |
10 | * | |
11 | * FFmpeg 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. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "config.h" | |
22 | #include "libavutil/attributes.h" | |
23 | #include "libavutil/cpu.h" | |
24 | #include "libavutil/mem.h" | |
25 | #include "libavutil/ppc/cpu.h" | |
26 | #include "libavutil/ppc/util_altivec.h" | |
27 | #include "libavcodec/fmtconvert.h" | |
28 | ||
29 | #if HAVE_ALTIVEC | |
30 | ||
31 | static void int32_to_float_fmul_scalar_altivec(float *dst, const int32_t *src, | |
32 | float mul, int len) | |
33 | { | |
34 | union { | |
35 | vector float v; | |
36 | float s[4]; | |
37 | } mul_u; | |
38 | int i; | |
39 | vector float src1, src2, dst1, dst2, mul_v, zero; | |
40 | ||
41 | zero = (vector float)vec_splat_u32(0); | |
42 | mul_u.s[0] = mul; | |
43 | mul_v = vec_splat(mul_u.v, 0); | |
44 | ||
45 | for (i = 0; i < len; i += 8) { | |
46 | src1 = vec_ctf(vec_ld(0, src+i), 0); | |
47 | src2 = vec_ctf(vec_ld(16, src+i), 0); | |
48 | dst1 = vec_madd(src1, mul_v, zero); | |
49 | dst2 = vec_madd(src2, mul_v, zero); | |
50 | vec_st(dst1, 0, dst+i); | |
51 | vec_st(dst2, 16, dst+i); | |
52 | } | |
53 | } | |
54 | ||
55 | ||
56 | static vector signed short float_to_int16_one_altivec(const float *src) | |
57 | { | |
58 | vector float s0 = vec_ld(0, src); | |
59 | vector float s1 = vec_ld(16, src); | |
60 | vector signed int t0 = vec_cts(s0, 0); | |
61 | vector signed int t1 = vec_cts(s1, 0); | |
62 | return vec_packs(t0,t1); | |
63 | } | |
64 | ||
65 | static void float_to_int16_altivec(int16_t *dst, const float *src, long len) | |
66 | { | |
67 | int i; | |
68 | vector signed short d0, d1, d; | |
69 | vector unsigned char align; | |
70 | if (((long)dst) & 15) { //FIXME | |
71 | for (i = 0; i < len - 7; i += 8) { | |
72 | d0 = vec_ld(0, dst+i); | |
73 | d = float_to_int16_one_altivec(src + i); | |
74 | d1 = vec_ld(15, dst+i); | |
75 | d1 = vec_perm(d1, d0, vec_lvsl(0, dst + i)); | |
76 | align = vec_lvsr(0, dst + i); | |
77 | d0 = vec_perm(d1, d, align); | |
78 | d1 = vec_perm(d, d1, align); | |
79 | vec_st(d0, 0, dst + i); | |
80 | vec_st(d1, 15, dst + i); | |
81 | } | |
82 | } else { | |
83 | for (i = 0; i < len - 7; i += 8) { | |
84 | d = float_to_int16_one_altivec(src + i); | |
85 | vec_st(d, 0, dst + i); | |
86 | } | |
87 | } | |
88 | } | |
89 | ||
90 | #define VSTE_INC(dst, v, elem, inc) do { \ | |
91 | vector signed short s = vec_splat(v, elem); \ | |
92 | vec_ste(s, 0, dst); \ | |
93 | dst += inc; \ | |
94 | } while (0) | |
95 | ||
96 | static void float_to_int16_stride_altivec(int16_t *dst, const float *src, | |
97 | long len, int stride) | |
98 | { | |
99 | int i; | |
100 | vector signed short d; | |
101 | ||
102 | for (i = 0; i < len - 7; i += 8) { | |
103 | d = float_to_int16_one_altivec(src + i); | |
104 | VSTE_INC(dst, d, 0, stride); | |
105 | VSTE_INC(dst, d, 1, stride); | |
106 | VSTE_INC(dst, d, 2, stride); | |
107 | VSTE_INC(dst, d, 3, stride); | |
108 | VSTE_INC(dst, d, 4, stride); | |
109 | VSTE_INC(dst, d, 5, stride); | |
110 | VSTE_INC(dst, d, 6, stride); | |
111 | VSTE_INC(dst, d, 7, stride); | |
112 | } | |
113 | } | |
114 | ||
115 | static void float_to_int16_interleave_altivec(int16_t *dst, const float **src, | |
116 | long len, int channels) | |
117 | { | |
118 | int i; | |
119 | vector signed short d0, d1, d2, c0, c1, t0, t1; | |
120 | vector unsigned char align; | |
121 | ||
122 | if (channels == 1) | |
123 | float_to_int16_altivec(dst, src[0], len); | |
124 | else { | |
125 | if (channels == 2) { | |
126 | if (((long)dst) & 15) { | |
127 | for (i = 0; i < len - 7; i += 8) { | |
128 | d0 = vec_ld(0, dst + i); | |
129 | t0 = float_to_int16_one_altivec(src[0] + i); | |
130 | d1 = vec_ld(31, dst + i); | |
131 | t1 = float_to_int16_one_altivec(src[1] + i); | |
132 | c0 = vec_mergeh(t0, t1); | |
133 | c1 = vec_mergel(t0, t1); | |
134 | d2 = vec_perm(d1, d0, vec_lvsl(0, dst + i)); | |
135 | align = vec_lvsr(0, dst + i); | |
136 | d0 = vec_perm(d2, c0, align); | |
137 | d1 = vec_perm(c0, c1, align); | |
138 | vec_st(d0, 0, dst + i); | |
139 | d0 = vec_perm(c1, d2, align); | |
140 | vec_st(d1, 15, dst + i); | |
141 | vec_st(d0, 31, dst + i); | |
142 | dst += 8; | |
143 | } | |
144 | } else { | |
145 | for (i = 0; i < len - 7; i += 8) { | |
146 | t0 = float_to_int16_one_altivec(src[0] + i); | |
147 | t1 = float_to_int16_one_altivec(src[1] + i); | |
148 | d0 = vec_mergeh(t0, t1); | |
149 | d1 = vec_mergel(t0, t1); | |
150 | vec_st(d0, 0, dst + i); | |
151 | vec_st(d1, 16, dst + i); | |
152 | dst += 8; | |
153 | } | |
154 | } | |
155 | } else { | |
156 | for (i = 0; i < channels; i++) | |
157 | float_to_int16_stride_altivec(dst + i, src[i], len, channels); | |
158 | } | |
159 | } | |
160 | } | |
161 | ||
162 | #endif /* HAVE_ALTIVEC */ | |
163 | ||
164 | av_cold void ff_fmt_convert_init_ppc(FmtConvertContext *c, | |
165 | AVCodecContext *avctx) | |
166 | { | |
167 | #if HAVE_ALTIVEC | |
168 | if (!PPC_ALTIVEC(av_get_cpu_flags())) | |
169 | return; | |
170 | ||
171 | c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec; | |
172 | if (!(avctx->flags & CODEC_FLAG_BITEXACT)) { | |
173 | c->float_to_int16 = float_to_int16_altivec; | |
174 | c->float_to_int16_interleave = float_to_int16_interleave_altivec; | |
175 | } | |
176 | #endif /* HAVE_ALTIVEC */ | |
177 | } |