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yuv2yuv_altivec.c
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1/*
2 * AltiVec-enhanced yuv-to-yuv conversion routines.
3 *
4 * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
5 * based on the equivalent C code in swscale.c
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <inttypes.h>
25
26#include "config.h"
27#include "libavutil/attributes.h"
28#include "libavutil/cpu.h"
29#include "libswscale/swscale.h"
30#include "libswscale/swscale_internal.h"
31
32#if HAVE_ALTIVEC
33#include "libavutil/ppc/util_altivec.h"
34
35static int yv12toyuy2_unscaled_altivec(SwsInternal *c, const uint8_t *const src[],
36 const int srcStride[], int srcSliceY,
37 int srcSliceH, uint8_t *const dstParam[],
38 const int dstStride_a[])
39{
40 uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY;
41 // yv12toyuy2(src[0], src[1], src[2], dst, c->opts.src_w, srcSliceH,
42 // srcStride[0], srcStride[1], dstStride[0]);
43 const uint8_t *ysrc = src[0];
44 const uint8_t *usrc = src[1];
45 const uint8_t *vsrc = src[2];
46 const int width = c->opts.src_w;
47 const int height = srcSliceH;
48 const int lumStride = srcStride[0];
49 const int chromStride = srcStride[1];
50 const int dstStride = dstStride_a[0];
51 const vector unsigned char yperm = vec_lvsl(0, ysrc);
52 const int vertLumPerChroma = 2;
53 register unsigned int y;
54
55 /* This code assumes:
56 *
57 * 1) dst is 16 bytes-aligned
58 * 2) dstStride is a multiple of 16
59 * 3) width is a multiple of 16
60 * 4) lum & chrom stride are multiples of 8
61 */
62
63 for (y = 0; y < height; y++) {
64 int i;
65 for (i = 0; i < width - 31; i += 32) {
66 const unsigned int j = i >> 1;
67 vector unsigned char v_yA = vec_ld(i, ysrc);
68 vector unsigned char v_yB = vec_ld(i + 16, ysrc);
69 vector unsigned char v_yC = vec_ld(i + 32, ysrc);
70 vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
71 vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
72 vector unsigned char v_uA = vec_ld(j, usrc);
73 vector unsigned char v_uB = vec_ld(j + 16, usrc);
74 vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
75 vector unsigned char v_vA = vec_ld(j, vsrc);
76 vector unsigned char v_vB = vec_ld(j + 16, vsrc);
77 vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
78 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
79 vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
80 vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
81 vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
82 vector unsigned char v_yuy2_2 = vec_mergeh(v_y2, v_uv_b);
83 vector unsigned char v_yuy2_3 = vec_mergel(v_y2, v_uv_b);
84 vec_st(v_yuy2_0, (i << 1), dst);
85 vec_st(v_yuy2_1, (i << 1) + 16, dst);
86 vec_st(v_yuy2_2, (i << 1) + 32, dst);
87 vec_st(v_yuy2_3, (i << 1) + 48, dst);
88 }
89 if (i < width) {
90 const unsigned int j = i >> 1;
91 vector unsigned char v_y1 = vec_ld(i, ysrc);
92 vector unsigned char v_u = vec_ld(j, usrc);
93 vector unsigned char v_v = vec_ld(j, vsrc);
94 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
95 vector unsigned char v_yuy2_0 = vec_mergeh(v_y1, v_uv_a);
96 vector unsigned char v_yuy2_1 = vec_mergel(v_y1, v_uv_a);
97 vec_st(v_yuy2_0, (i << 1), dst);
98 vec_st(v_yuy2_1, (i << 1) + 16, dst);
99 }
100 if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
101 usrc += chromStride;
102 vsrc += chromStride;
103 }
104 ysrc += lumStride;
105 dst += dstStride;
106 }
107
108 return srcSliceH;
109}
110
111static int yv12touyvy_unscaled_altivec(SwsInternal *c, const uint8_t *const src[],
112 const int srcStride[], int srcSliceY,
113 int srcSliceH, uint8_t *const dstParam[],
114 const int dstStride_a[])
115{
116 uint8_t *dst = dstParam[0] + dstStride_a[0] * srcSliceY;
117 // yv12toyuy2(src[0], src[1], src[2], dst, c->opts.src_w, srcSliceH,
118 // srcStride[0], srcStride[1], dstStride[0]);
119 const uint8_t *ysrc = src[0];
120 const uint8_t *usrc = src[1];
121 const uint8_t *vsrc = src[2];
122 const int width = c->opts.src_w;
123 const int height = srcSliceH;
124 const int lumStride = srcStride[0];
125 const int chromStride = srcStride[1];
126 const int dstStride = dstStride_a[0];
127 const int vertLumPerChroma = 2;
128 const vector unsigned char yperm = vec_lvsl(0, ysrc);
129 register unsigned int y;
130
131 /* This code assumes:
132 *
133 * 1) dst is 16 bytes-aligned
134 * 2) dstStride is a multiple of 16
135 * 3) width is a multiple of 16
136 * 4) lum & chrom stride are multiples of 8
137 */
138
139 for (y = 0; y < height; y++) {
140 int i;
141 for (i = 0; i < width - 31; i += 32) {
142 const unsigned int j = i >> 1;
143 vector unsigned char v_yA = vec_ld(i, ysrc);
144 vector unsigned char v_yB = vec_ld(i + 16, ysrc);
145 vector unsigned char v_yC = vec_ld(i + 32, ysrc);
146 vector unsigned char v_y1 = vec_perm(v_yA, v_yB, yperm);
147 vector unsigned char v_y2 = vec_perm(v_yB, v_yC, yperm);
148 vector unsigned char v_uA = vec_ld(j, usrc);
149 vector unsigned char v_uB = vec_ld(j + 16, usrc);
150 vector unsigned char v_u = vec_perm(v_uA, v_uB, vec_lvsl(j, usrc));
151 vector unsigned char v_vA = vec_ld(j, vsrc);
152 vector unsigned char v_vB = vec_ld(j + 16, vsrc);
153 vector unsigned char v_v = vec_perm(v_vA, v_vB, vec_lvsl(j, vsrc));
154 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
155 vector unsigned char v_uv_b = vec_mergel(v_u, v_v);
156 vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
157 vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
158 vector unsigned char v_uyvy_2 = vec_mergeh(v_uv_b, v_y2);
159 vector unsigned char v_uyvy_3 = vec_mergel(v_uv_b, v_y2);
160 vec_st(v_uyvy_0, (i << 1), dst);
161 vec_st(v_uyvy_1, (i << 1) + 16, dst);
162 vec_st(v_uyvy_2, (i << 1) + 32, dst);
163 vec_st(v_uyvy_3, (i << 1) + 48, dst);
164 }
165 if (i < width) {
166 const unsigned int j = i >> 1;
167 vector unsigned char v_y1 = vec_ld(i, ysrc);
168 vector unsigned char v_u = vec_ld(j, usrc);
169 vector unsigned char v_v = vec_ld(j, vsrc);
170 vector unsigned char v_uv_a = vec_mergeh(v_u, v_v);
171 vector unsigned char v_uyvy_0 = vec_mergeh(v_uv_a, v_y1);
172 vector unsigned char v_uyvy_1 = vec_mergel(v_uv_a, v_y1);
173 vec_st(v_uyvy_0, (i << 1), dst);
174 vec_st(v_uyvy_1, (i << 1) + 16, dst);
175 }
176 if ((y & (vertLumPerChroma - 1)) == vertLumPerChroma - 1) {
177 usrc += chromStride;
178 vsrc += chromStride;
179 }
180 ysrc += lumStride;
181 dst += dstStride;
182 }
183 return srcSliceH;
184}
185
186#endif /* HAVE_ALTIVEC */
187
188av_cold void ff_get_unscaled_swscale_ppc(SwsInternal *c)
189{
190#if HAVE_ALTIVEC
191 if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
192 return;
193
194 if (!(c->opts.src_w & 15) && !(c->opts.flags & SWS_BITEXACT) &&
195 c->opts.src_format == AV_PIX_FMT_YUV420P) {
196 enum AVPixelFormat dstFormat = c->opts.dst_format;
197
198 // unscaled YV12 -> packed YUV, we want speed
199 if (dstFormat == AV_PIX_FMT_YUYV422)
200 c->convert_unscaled = yv12toyuy2_unscaled_altivec;
201 else if (dstFormat == AV_PIX_FMT_UYVY422)
202 c->convert_unscaled = yv12touyvy_unscaled_altivec;
203 }
204#endif /* HAVE_ALTIVEC */
205}
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition dsp.h:87
i
#define i(width, name, range_min, range_max)
Definition cbs_h264.c:63
SWS_BITEXACT
@ SWS_BITEXACT
Definition swscale.h:178
attributes.h
Macro definitions for various function/variable attributes.
av_cold
#define av_cold
Definition attributes.h:117
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition cpu.c:109
AV_CPU_FLAG_ALTIVEC
#define AV_CPU_FLAG_ALTIVEC
standard
Definition cpu.h:64
AVPixelFormat
AVPixelFormat
Pixel format.
Definition pixfmt.h:71
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition pixfmt.h:73
AV_PIX_FMT_UYVY422
@ AV_PIX_FMT_UYVY422
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition pixfmt.h:88
AV_PIX_FMT_YUYV422
@ AV_PIX_FMT_YUYV422
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition pixfmt.h:74
swscale.h
external API header
swscale_internal.h
src
#define src
Definition vp8dsp.c:248
height
#define height
Definition dsp.h:89
width
#define width
Definition dsp.h:89
util_altivec.h
Contains misc utility macros and inline functions.
c
static double c[64]
Definition vsrc_mptestsrc.c:89
ff_get_unscaled_swscale_ppc
av_cold void ff_get_unscaled_swscale_ppc(SwsInternal *c)
Definition yuv2yuv_altivec.c:188
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