vp8dsp_altivec.c 10.6 KB
Newer Older
1
/*
David Conrad's avatar
David Conrad committed
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
 * VP8 compatible video decoder
 *
 * Copyright (C) 2010 David Conrad
 *
 * 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
 */

23
#include "libavutil/cpu.h"
24
#include "libavutil/mem.h"
25 26
#include "libavutil/ppc/types_altivec.h"
#include "libavutil/ppc/util_altivec.h"
David Conrad's avatar
David Conrad committed
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
#include "libavcodec/vp8dsp.h"
#include "dsputil_altivec.h"

#define REPT4(...) { __VA_ARGS__, __VA_ARGS__, __VA_ARGS__, __VA_ARGS__ }

// h subpel filter uses msum to multiply+add 4 pixel taps at once
static const vec_s8 h_subpel_filters_inner[7] =
{
    REPT4( -6, 123,  12,  -1),
    REPT4(-11, 108,  36,  -8),
    REPT4( -9,  93,  50,  -6),
    REPT4(-16,  77,  77, -16),
    REPT4( -6,  50,  93,  -9),
    REPT4( -8,  36, 108, -11),
    REPT4( -1,  12, 123,  -6),
};

// for 6tap filters, these are the outer two taps
// The zeros mask off pixels 4-7 when filtering 0-3
// and vice-versa
static const vec_s8 h_subpel_filters_outer[3] =
{
    REPT4(0, 0, 2, 1),
    REPT4(0, 0, 3, 3),
    REPT4(0, 0, 1, 2),
};

#define LOAD_H_SUBPEL_FILTER(i) \
    vec_s8 filter_inner  = h_subpel_filters_inner[i]; \
    vec_s8 filter_outerh = h_subpel_filters_outer[(i)>>1]; \
    vec_s8 filter_outerl = vec_sld(filter_outerh, filter_outerh, 2)

#define FILTER_H(dstv, off) \
60 61
    a = vec_ld((off)-is6tap-1,    src); \
    b = vec_ld((off)-is6tap-1+15, src); \
David Conrad's avatar
David Conrad committed
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78
\
    pixh  = vec_perm(a, b, permh##off); \
    pixl  = vec_perm(a, b, perml##off); \
    filth = vec_msum(filter_inner, pixh, c64); \
    filtl = vec_msum(filter_inner, pixl, c64); \
\
    if (is6tap) { \
        outer = vec_perm(a, b, perm_6tap##off); \
        filth = vec_msum(filter_outerh, outer, filth); \
        filtl = vec_msum(filter_outerl, outer, filtl); \
    } \
    if (w == 4) \
        filtl = filth; /* discard pixels 4-7 */ \
    dstv = vec_packs(filth, filtl); \
    dstv = vec_sra(dstv, c7)

static av_always_inline
79 80
void put_vp8_epel_h_altivec_core(uint8_t *dst, ptrdiff_t dst_stride,
                                 uint8_t *src, ptrdiff_t src_stride,
David Conrad's avatar
David Conrad committed
81 82 83 84 85 86 87 88 89
                                 int h, int mx, int w, int is6tap)
{
    LOAD_H_SUBPEL_FILTER(mx-1);
    vec_u8 align_vec0, align_vec8, permh0, permh8, filt;
    vec_u8 perm_6tap0, perm_6tap8, perml0, perml8;
    vec_u8 a, b, pixh, pixl, outer;
    vec_s16 f16h, f16l;
    vec_s32 filth, filtl;

90 91 92
    vec_u8 perm_inner6 = { 1,2,3,4, 2,3,4,5, 3,4,5,6, 4,5,6,7 };
    vec_u8 perm_inner4 = { 0,1,2,3, 1,2,3,4, 2,3,4,5, 3,4,5,6 };
    vec_u8 perm_inner  = is6tap ? perm_inner6 : perm_inner4;
David Conrad's avatar
David Conrad committed
93 94 95 96
    vec_u8 perm_outer = { 4,9, 0,5, 5,10, 1,6, 6,11, 2,7, 7,12, 3,8 };
    vec_s32 c64 = vec_sl(vec_splat_s32(1), vec_splat_u32(6));
    vec_u16 c7  = vec_splat_u16(7);

97 98
    align_vec0 = vec_lvsl( -is6tap-1, src);
    align_vec8 = vec_lvsl(8-is6tap-1, src);
David Conrad's avatar
David Conrad committed
99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164

    permh0     = vec_perm(align_vec0, align_vec0, perm_inner);
    permh8     = vec_perm(align_vec8, align_vec8, perm_inner);
    perm_inner = vec_add(perm_inner, vec_splat_u8(4));
    perml0     = vec_perm(align_vec0, align_vec0, perm_inner);
    perml8     = vec_perm(align_vec8, align_vec8, perm_inner);
    perm_6tap0 = vec_perm(align_vec0, align_vec0, perm_outer);
    perm_6tap8 = vec_perm(align_vec8, align_vec8, perm_outer);

    while (h --> 0) {
        FILTER_H(f16h, 0);

        if (w == 16) {
            FILTER_H(f16l, 8);
            filt = vec_packsu(f16h, f16l);
            vec_st(filt, 0, dst);
        } else {
            filt = vec_packsu(f16h, f16h);
            vec_ste((vec_u32)filt, 0, (uint32_t*)dst);
            if (w == 8)
                vec_ste((vec_u32)filt, 4, (uint32_t*)dst);
        }
        src += src_stride;
        dst += dst_stride;
    }
}

// v subpel filter does a simple vertical multiply + add
static const vec_u8 v_subpel_filters[7] =
{
    { 0,   6, 123,  12,   1,   0 },
    { 2,  11, 108,  36,   8,   1 },
    { 0,   9,  93,  50,   6,   0 },
    { 3,  16,  77,  77,  16,   3 },
    { 0,   6,  50,  93,   9,   0 },
    { 1,   8,  36, 108,  11,   2 },
    { 0,   1,  12, 123,   6,   0 },
};

#define LOAD_V_SUBPEL_FILTER(i) \
    vec_u8 subpel_filter = v_subpel_filters[i]; \
    vec_u8 f0 = vec_splat(subpel_filter, 0); \
    vec_u8 f1 = vec_splat(subpel_filter, 1); \
    vec_u8 f2 = vec_splat(subpel_filter, 2); \
    vec_u8 f3 = vec_splat(subpel_filter, 3); \
    vec_u8 f4 = vec_splat(subpel_filter, 4); \
    vec_u8 f5 = vec_splat(subpel_filter, 5)

#define FILTER_V(dstv, vec_mul) \
    s1f = (vec_s16)vec_mul(s1, f1); \
    s2f = (vec_s16)vec_mul(s2, f2); \
    s3f = (vec_s16)vec_mul(s3, f3); \
    s4f = (vec_s16)vec_mul(s4, f4); \
    s2f = vec_subs(s2f, s1f); \
    s3f = vec_subs(s3f, s4f); \
    if (is6tap) { \
        s0f = (vec_s16)vec_mul(s0, f0); \
        s5f = (vec_s16)vec_mul(s5, f5); \
        s2f = vec_adds(s2f, s0f); \
        s3f = vec_adds(s3f, s5f); \
    } \
    dstv = vec_adds(s2f, s3f); \
    dstv = vec_adds(dstv, c64); \
    dstv = vec_sra(dstv, c7)

static av_always_inline
165 166
void put_vp8_epel_v_altivec_core(uint8_t *dst, ptrdiff_t dst_stride,
                                 uint8_t *src, ptrdiff_t src_stride,
David Conrad's avatar
David Conrad committed
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
                                 int h, int my, int w, int is6tap)
{
    LOAD_V_SUBPEL_FILTER(my-1);
    vec_u8 s0, s1, s2, s3, s4, s5, filt, align_vech, perm_vec, align_vecl;
    vec_s16 s0f, s1f, s2f, s3f, s4f, s5f, f16h, f16l;
    vec_s16 c64 = vec_sl(vec_splat_s16(1), vec_splat_u16(6));
    vec_u16 c7  = vec_splat_u16(7);

    // we want pixels 0-7 to be in the even positions and 8-15 in the odd,
    // so combine this permute with the alignment permute vector
    align_vech = vec_lvsl(0, src);
    align_vecl = vec_sld(align_vech, align_vech, 8);
    if (w ==16)
        perm_vec = vec_mergeh(align_vech, align_vecl);
    else
        perm_vec = vec_mergeh(align_vech, align_vech);

    if (is6tap)
        s0 = load_with_perm_vec(-2*src_stride, src, perm_vec);
    s1 = load_with_perm_vec(-1*src_stride, src, perm_vec);
    s2 = load_with_perm_vec( 0*src_stride, src, perm_vec);
    s3 = load_with_perm_vec( 1*src_stride, src, perm_vec);
    if (is6tap)
        s4 = load_with_perm_vec( 2*src_stride, src, perm_vec);

    src += (2+is6tap)*src_stride;

    while (h --> 0) {
        if (is6tap)
            s5 = load_with_perm_vec(0, src, perm_vec);
        else
            s4 = load_with_perm_vec(0, src, perm_vec);

        FILTER_V(f16h, vec_mule);

        if (w == 16) {
            FILTER_V(f16l, vec_mulo);
            filt = vec_packsu(f16h, f16l);
            vec_st(filt, 0, dst);
        } else {
            filt = vec_packsu(f16h, f16h);
            if (w == 4)
                filt = (vec_u8)vec_splat((vec_u32)filt, 0);
            else
                vec_ste((vec_u32)filt, 4, (uint32_t*)dst);
            vec_ste((vec_u32)filt, 0, (uint32_t*)dst);
        }

        if (is6tap)
            s0 = s1;
        s1 = s2;
        s2 = s3;
        s3 = s4;
        if (is6tap)
            s4 = s5;

        dst += dst_stride;
        src += src_stride;
    }
}

#define EPEL_FUNCS(WIDTH, TAPS) \
static av_noinline \
230
void put_vp8_epel ## WIDTH ## _h ## TAPS ## _altivec(uint8_t *dst, ptrdiff_t dst_stride, uint8_t *src, ptrdiff_t src_stride, int h, int mx, int my) \
David Conrad's avatar
David Conrad committed
231 232 233 234 235
{ \
    put_vp8_epel_h_altivec_core(dst, dst_stride, src, src_stride, h, mx, WIDTH, TAPS == 6); \
} \
\
static av_noinline \
236
void put_vp8_epel ## WIDTH ## _v ## TAPS ## _altivec(uint8_t *dst, ptrdiff_t dst_stride, uint8_t *src, ptrdiff_t src_stride, int h, int mx, int my) \
David Conrad's avatar
David Conrad committed
237 238 239 240 241
{ \
    put_vp8_epel_v_altivec_core(dst, dst_stride, src, src_stride, h, my, WIDTH, TAPS == 6); \
}

#define EPEL_HV(WIDTH, HTAPS, VTAPS) \
242
static void put_vp8_epel ## WIDTH ## _h ## HTAPS ## v ## VTAPS ## _altivec(uint8_t *dst, ptrdiff_t stride, uint8_t *src, ptrdiff_t s, int h, int mx, int my) \
David Conrad's avatar
David Conrad committed
243 244
{ \
    DECLARE_ALIGNED(16, uint8_t, tmp)[(2*WIDTH+5)*16]; \
245 246 247 248 249 250 251
    if (VTAPS == 6) { \
        put_vp8_epel ## WIDTH ## _h ## HTAPS ## _altivec(tmp, 16,     src-2*stride, stride, h+5, mx, my); \
        put_vp8_epel ## WIDTH ## _v ## VTAPS ## _altivec(dst, stride, tmp+2*16,     16,     h,   mx, my); \
    } else { \
        put_vp8_epel ## WIDTH ## _h ## HTAPS ## _altivec(tmp, 16,     src-stride, stride, h+4, mx, my); \
        put_vp8_epel ## WIDTH ## _v ## VTAPS ## _altivec(dst, stride, tmp+16,     16,     h,   mx, my); \
    } \
David Conrad's avatar
David Conrad committed
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
}

EPEL_FUNCS(16,6)
EPEL_FUNCS(8, 6)
EPEL_FUNCS(8, 4)
EPEL_FUNCS(4, 6)
EPEL_FUNCS(4, 4)

EPEL_HV(16, 6,6)
EPEL_HV(8,  6,6)
EPEL_HV(8,  4,6)
EPEL_HV(8,  6,4)
EPEL_HV(8,  4,4)
EPEL_HV(4,  6,6)
EPEL_HV(4,  4,6)
EPEL_HV(4,  6,4)
EPEL_HV(4,  4,4)

270
static void put_vp8_pixels16_altivec(uint8_t *dst, ptrdiff_t stride, uint8_t *src, ptrdiff_t s, int h, int mx, int my)
David Conrad's avatar
David Conrad committed
271
{
272
    ff_put_pixels16_altivec(dst, src, stride, h);
David Conrad's avatar
David Conrad committed
273 274 275 276
}

av_cold void ff_vp8dsp_init_altivec(VP8DSPContext *c)
{
277
    if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
David Conrad's avatar
David Conrad committed
278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304
        return;

    c->put_vp8_epel_pixels_tab[0][0][0] = put_vp8_pixels16_altivec;
    c->put_vp8_epel_pixels_tab[0][0][2] = put_vp8_epel16_h6_altivec;
    c->put_vp8_epel_pixels_tab[0][2][0] = put_vp8_epel16_v6_altivec;
    c->put_vp8_epel_pixels_tab[0][2][2] = put_vp8_epel16_h6v6_altivec;

    c->put_vp8_epel_pixels_tab[1][0][2] = put_vp8_epel8_h6_altivec;
    c->put_vp8_epel_pixels_tab[1][2][0] = put_vp8_epel8_v6_altivec;
    c->put_vp8_epel_pixels_tab[1][0][1] = put_vp8_epel8_h4_altivec;
    c->put_vp8_epel_pixels_tab[1][1][0] = put_vp8_epel8_v4_altivec;

    c->put_vp8_epel_pixels_tab[1][2][2] = put_vp8_epel8_h6v6_altivec;
    c->put_vp8_epel_pixels_tab[1][1][1] = put_vp8_epel8_h4v4_altivec;
    c->put_vp8_epel_pixels_tab[1][1][2] = put_vp8_epel8_h6v4_altivec;
    c->put_vp8_epel_pixels_tab[1][2][1] = put_vp8_epel8_h4v6_altivec;

    c->put_vp8_epel_pixels_tab[2][0][2] = put_vp8_epel4_h6_altivec;
    c->put_vp8_epel_pixels_tab[2][2][0] = put_vp8_epel4_v6_altivec;
    c->put_vp8_epel_pixels_tab[2][0][1] = put_vp8_epel4_h4_altivec;
    c->put_vp8_epel_pixels_tab[2][1][0] = put_vp8_epel4_v4_altivec;

    c->put_vp8_epel_pixels_tab[2][2][2] = put_vp8_epel4_h6v6_altivec;
    c->put_vp8_epel_pixels_tab[2][1][1] = put_vp8_epel4_h4v4_altivec;
    c->put_vp8_epel_pixels_tab[2][1][2] = put_vp8_epel4_h6v4_altivec;
    c->put_vp8_epel_pixels_tab[2][2][1] = put_vp8_epel4_h4v6_altivec;
}