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FFmpeg/libavcodec/ppc/vc1dsp_altivec.c

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/*
* VC-1 and WMV3 decoder - DSP functions AltiVec-optimized
* Copyright (c) 2006 Konstantin Shishkov
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/ppc/cpu.h"
#include "libavutil/ppc/types_altivec.h"
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/vc1dsp.h"
#if HAVE_ALTIVEC
// main steps of 8x8 transform
#define STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_rnd) \
do { \
t0 = vec_sl(vec_add(s0, s4), vec_2); \
t0 = vec_add(vec_sl(t0, vec_1), t0); \
t0 = vec_add(t0, vec_rnd); \
t1 = vec_sl(vec_sub(s0, s4), vec_2); \
t1 = vec_add(vec_sl(t1, vec_1), t1); \
t1 = vec_add(t1, vec_rnd); \
t2 = vec_add(vec_sl(s6, vec_2), vec_sl(s6, vec_1)); \
t2 = vec_add(t2, vec_sl(s2, vec_4)); \
t3 = vec_add(vec_sl(s2, vec_2), vec_sl(s2, vec_1)); \
t3 = vec_sub(t3, vec_sl(s6, vec_4)); \
t4 = vec_add(t0, t2); \
t5 = vec_add(t1, t3); \
t6 = vec_sub(t1, t3); \
t7 = vec_sub(t0, t2); \
\
t0 = vec_sl(vec_add(s1, s3), vec_4); \
t0 = vec_add(t0, vec_sl(s5, vec_3)); \
t0 = vec_add(t0, vec_sl(s7, vec_2)); \
t0 = vec_add(t0, vec_sub(s5, s3)); \
\
t1 = vec_sl(vec_sub(s1, s5), vec_4); \
t1 = vec_sub(t1, vec_sl(s7, vec_3)); \
t1 = vec_sub(t1, vec_sl(s3, vec_2)); \
t1 = vec_sub(t1, vec_add(s1, s7)); \
\
t2 = vec_sl(vec_sub(s7, s3), vec_4); \
t2 = vec_add(t2, vec_sl(s1, vec_3)); \
t2 = vec_add(t2, vec_sl(s5, vec_2)); \
t2 = vec_add(t2, vec_sub(s1, s7)); \
\
t3 = vec_sl(vec_sub(s5, s7), vec_4); \
t3 = vec_sub(t3, vec_sl(s3, vec_3)); \
t3 = vec_add(t3, vec_sl(s1, vec_2)); \
t3 = vec_sub(t3, vec_add(s3, s5)); \
\
s0 = vec_add(t4, t0); \
s1 = vec_add(t5, t1); \
s2 = vec_add(t6, t2); \
s3 = vec_add(t7, t3); \
s4 = vec_sub(t7, t3); \
s5 = vec_sub(t6, t2); \
s6 = vec_sub(t5, t1); \
s7 = vec_sub(t4, t0); \
}while(0)
#define SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7) \
do { \
s0 = vec_sra(s0, vec_3); \
s1 = vec_sra(s1, vec_3); \
s2 = vec_sra(s2, vec_3); \
s3 = vec_sra(s3, vec_3); \
s4 = vec_sra(s4, vec_3); \
s5 = vec_sra(s5, vec_3); \
s6 = vec_sra(s6, vec_3); \
s7 = vec_sra(s7, vec_3); \
}while(0)
#define SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7) \
do { \
s0 = vec_sra(s0, vec_7); \
s1 = vec_sra(s1, vec_7); \
s2 = vec_sra(s2, vec_7); \
s3 = vec_sra(s3, vec_7); \
s4 = vec_sra(vec_add(s4, vec_1s), vec_7); \
s5 = vec_sra(vec_add(s5, vec_1s), vec_7); \
s6 = vec_sra(vec_add(s6, vec_1s), vec_7); \
s7 = vec_sra(vec_add(s7, vec_1s), vec_7); \
}while(0)
/* main steps of 4x4 transform */
#define STEP4(s0, s1, s2, s3, vec_rnd) \
do { \
t1 = vec_add(vec_sl(s0, vec_4), s0); \
t1 = vec_add(t1, vec_rnd); \
t2 = vec_add(vec_sl(s2, vec_4), s2); \
t0 = vec_add(t1, t2); \
t1 = vec_sub(t1, t2); \
t3 = vec_sl(vec_sub(s3, s1), vec_1); \
t3 = vec_add(t3, vec_sl(t3, vec_2)); \
t2 = vec_add(t3, vec_sl(s1, vec_5)); \
t3 = vec_add(t3, vec_sl(s3, vec_3)); \
t3 = vec_add(t3, vec_sl(s3, vec_2)); \
s0 = vec_add(t0, t2); \
s1 = vec_sub(t1, t3); \
s2 = vec_add(t1, t3); \
s3 = vec_sub(t0, t2); \
}while (0)
#define SHIFT_HOR4(s0, s1, s2, s3) \
s0 = vec_sra(s0, vec_3); \
s1 = vec_sra(s1, vec_3); \
s2 = vec_sra(s2, vec_3); \
s3 = vec_sra(s3, vec_3);
#define SHIFT_VERT4(s0, s1, s2, s3) \
s0 = vec_sra(s0, vec_7); \
s1 = vec_sra(s1, vec_7); \
s2 = vec_sra(s2, vec_7); \
s3 = vec_sra(s3, vec_7);
/** Do inverse transform on 8x8 block
*/
static void vc1_inv_trans_8x8_altivec(int16_t block[64])
{
vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
const vector unsigned int vec_7 = vec_splat_u32(7);
const vector unsigned int vec_4 = vec_splat_u32(4);
const vector signed int vec_4s = vec_splat_s32(4);
const vector unsigned int vec_3 = vec_splat_u32(3);
const vector unsigned int vec_2 = vec_splat_u32(2);
const vector signed int vec_1s = vec_splat_s32(1);
const vector unsigned int vec_1 = vec_splat_u32(1);
src0 = vec_ld( 0, block);
src1 = vec_ld( 16, block);
src2 = vec_ld( 32, block);
src3 = vec_ld( 48, block);
src4 = vec_ld( 64, block);
src5 = vec_ld( 80, block);
src6 = vec_ld( 96, block);
src7 = vec_ld(112, block);
s0 = vec_unpackl(src0);
s1 = vec_unpackl(src1);
s2 = vec_unpackl(src2);
s3 = vec_unpackl(src3);
s4 = vec_unpackl(src4);
s5 = vec_unpackl(src5);
s6 = vec_unpackl(src6);
s7 = vec_unpackl(src7);
s8 = vec_unpackh(src0);
s9 = vec_unpackh(src1);
sA = vec_unpackh(src2);
sB = vec_unpackh(src3);
sC = vec_unpackh(src4);
sD = vec_unpackh(src5);
sE = vec_unpackh(src6);
sF = vec_unpackh(src7);
STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
src0 = vec_pack(s8, s0);
src1 = vec_pack(s9, s1);
src2 = vec_pack(sA, s2);
src3 = vec_pack(sB, s3);
src4 = vec_pack(sC, s4);
src5 = vec_pack(sD, s5);
src6 = vec_pack(sE, s6);
src7 = vec_pack(sF, s7);
TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
s0 = vec_unpackl(src0);
s1 = vec_unpackl(src1);
s2 = vec_unpackl(src2);
s3 = vec_unpackl(src3);
s4 = vec_unpackl(src4);
s5 = vec_unpackl(src5);
s6 = vec_unpackl(src6);
s7 = vec_unpackl(src7);
s8 = vec_unpackh(src0);
s9 = vec_unpackh(src1);
sA = vec_unpackh(src2);
sB = vec_unpackh(src3);
sC = vec_unpackh(src4);
sD = vec_unpackh(src5);
sE = vec_unpackh(src6);
sF = vec_unpackh(src7);
STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_64);
SHIFT_VERT8(s0, s1, s2, s3, s4, s5, s6, s7);
STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_64);
SHIFT_VERT8(s8, s9, sA, sB, sC, sD, sE, sF);
src0 = vec_pack(s8, s0);
src1 = vec_pack(s9, s1);
src2 = vec_pack(sA, s2);
src3 = vec_pack(sB, s3);
src4 = vec_pack(sC, s4);
src5 = vec_pack(sD, s5);
src6 = vec_pack(sE, s6);
src7 = vec_pack(sF, s7);
vec_st(src0, 0, block);
vec_st(src1, 16, block);
vec_st(src2, 32, block);
vec_st(src3, 48, block);
vec_st(src4, 64, block);
vec_st(src5, 80, block);
vec_st(src6, 96, block);
vec_st(src7,112, block);
}
/** Do inverse transform on 8x4 part of block
*/
static void vc1_inv_trans_8x4_altivec(uint8_t *dest, int stride, int16_t *block)
{
vector signed short src0, src1, src2, src3, src4, src5, src6, src7;
vector signed int s0, s1, s2, s3, s4, s5, s6, s7;
vector signed int s8, s9, sA, sB, sC, sD, sE, sF;
vector signed int t0, t1, t2, t3, t4, t5, t6, t7;
const vector signed int vec_64 = vec_sl(vec_splat_s32(4), vec_splat_u32(4));
const vector unsigned int vec_7 = vec_splat_u32(7);
const vector unsigned int vec_5 = vec_splat_u32(5);
const vector unsigned int vec_4 = vec_splat_u32(4);
const vector signed int vec_4s = vec_splat_s32(4);
const vector unsigned int vec_3 = vec_splat_u32(3);
const vector unsigned int vec_2 = vec_splat_u32(2);
const vector unsigned int vec_1 = vec_splat_u32(1);
vector unsigned char tmp;
vector signed short tmp2, tmp3;
vector unsigned char perm0, perm1, p0, p1, p;
src0 = vec_ld( 0, block);
src1 = vec_ld( 16, block);
src2 = vec_ld( 32, block);
src3 = vec_ld( 48, block);
src4 = vec_ld( 64, block);
src5 = vec_ld( 80, block);
src6 = vec_ld( 96, block);
src7 = vec_ld(112, block);
TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
s0 = vec_unpackl(src0);
s1 = vec_unpackl(src1);
s2 = vec_unpackl(src2);
s3 = vec_unpackl(src3);
s4 = vec_unpackl(src4);
s5 = vec_unpackl(src5);
s6 = vec_unpackl(src6);
s7 = vec_unpackl(src7);
s8 = vec_unpackh(src0);
s9 = vec_unpackh(src1);
sA = vec_unpackh(src2);
sB = vec_unpackh(src3);
sC = vec_unpackh(src4);
sD = vec_unpackh(src5);
sE = vec_unpackh(src6);
sF = vec_unpackh(src7);
STEP8(s0, s1, s2, s3, s4, s5, s6, s7, vec_4s);
SHIFT_HOR8(s0, s1, s2, s3, s4, s5, s6, s7);
STEP8(s8, s9, sA, sB, sC, sD, sE, sF, vec_4s);
SHIFT_HOR8(s8, s9, sA, sB, sC, sD, sE, sF);
src0 = vec_pack(s8, s0);
src1 = vec_pack(s9, s1);
src2 = vec_pack(sA, s2);
src3 = vec_pack(sB, s3);
src4 = vec_pack(sC, s4);
src5 = vec_pack(sD, s5);
src6 = vec_pack(sE, s6);
src7 = vec_pack(sF, s7);
TRANSPOSE8(src0, src1, src2, src3, src4, src5, src6, src7);
s0 = vec_unpackh(src0);
s1 = vec_unpackh(src1);
s2 = vec_unpackh(src2);
s3 = vec_unpackh(src3);
s8 = vec_unpackl(src0);
s9 = vec_unpackl(src1);
sA = vec_unpackl(src2);
sB = vec_unpackl(src3);
STEP4(s0, s1, s2, s3, vec_64);
SHIFT_VERT4(s0, s1, s2, s3);
STEP4(s8, s9, sA, sB, vec_64);
SHIFT_VERT4(s8, s9, sA, sB);
src0 = vec_pack(s0, s8);
src1 = vec_pack(s1, s9);
src2 = vec_pack(s2, sA);
src3 = vec_pack(s3, sB);
p0 = vec_lvsl (0, dest);
p1 = vec_lvsl (stride, dest);
p = vec_splat_u8 (-1);
perm0 = vec_mergeh (p, p0);
perm1 = vec_mergeh (p, p1);
#define ADD(dest,src,perm) \
/* *(uint64_t *)&tmp = *(uint64_t *)dest; */ \
tmp = vec_ld (0, dest); \
tmp2 = (vector signed short)vec_perm (tmp, vec_splat_u8(0), perm); \
tmp3 = vec_adds (tmp2, src); \
tmp = vec_packsu (tmp3, tmp3); \
vec_ste ((vector unsigned int)tmp, 0, (unsigned int *)dest); \
vec_ste ((vector unsigned int)tmp, 4, (unsigned int *)dest);
ADD (dest, src0, perm0) dest += stride;
ADD (dest, src1, perm1) dest += stride;
ADD (dest, src2, perm0) dest += stride;
ADD (dest, src3, perm1)
}
#define PUT_OP_U8_ALTIVEC(d, s, dst) d = s
#define AVG_OP_U8_ALTIVEC(d, s, dst) d = vec_avg(dst, s)
#define OP_U8_ALTIVEC PUT_OP_U8_ALTIVEC
#define PREFIX_no_rnd_vc1_chroma_mc8_altivec put_no_rnd_vc1_chroma_mc8_altivec
#include "h264chroma_template.c"
#undef OP_U8_ALTIVEC
#undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
#define OP_U8_ALTIVEC AVG_OP_U8_ALTIVEC
#define PREFIX_no_rnd_vc1_chroma_mc8_altivec avg_no_rnd_vc1_chroma_mc8_altivec
#include "h264chroma_template.c"
#undef OP_U8_ALTIVEC
#undef PREFIX_no_rnd_vc1_chroma_mc8_altivec
#endif /* HAVE_ALTIVEC */
av_cold void ff_vc1dsp_init_ppc(VC1DSPContext *dsp)
{
#if HAVE_ALTIVEC
if (!PPC_ALTIVEC(av_get_cpu_flags()))
return;
dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_altivec;
dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_altivec;
dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_altivec;
dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_altivec;
#endif /* HAVE_ALTIVEC */
}
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