mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
230 lines
11 KiB
C
230 lines
11 KiB
C
/*
|
|
* Copyright (c) 2001 Michel Lespinasse
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* NOTE: This code is based on GPL code from the libmpeg2 project. The
|
|
* author, Michel Lespinasses, has given explicit permission to release
|
|
* under LGPL as part of FFmpeg.
|
|
*/
|
|
|
|
/*
|
|
* FFmpeg integration by Dieter Shirley
|
|
*
|
|
* This file is a direct copy of the AltiVec IDCT module from the libmpeg2
|
|
* project. I've deleted all of the libmpeg2-specific code, renamed the
|
|
* functions and reordered the function parameters. The only change to the
|
|
* IDCT function itself was to factor out the partial transposition, and to
|
|
* perform a full transpose at the end of the function.
|
|
*/
|
|
|
|
|
|
#include <stdlib.h> /* malloc(), free() */
|
|
#include <string.h>
|
|
#include "config.h"
|
|
#if HAVE_ALTIVEC_H
|
|
#include <altivec.h>
|
|
#endif
|
|
#include "libavcodec/dsputil.h"
|
|
#include "types_altivec.h"
|
|
#include "dsputil_ppc.h"
|
|
|
|
#define IDCT_HALF \
|
|
/* 1st stage */ \
|
|
t1 = vec_mradds (a1, vx7, vx1 ); \
|
|
t8 = vec_mradds (a1, vx1, vec_subs (zero, vx7)); \
|
|
t7 = vec_mradds (a2, vx5, vx3); \
|
|
t3 = vec_mradds (ma2, vx3, vx5); \
|
|
\
|
|
/* 2nd stage */ \
|
|
t5 = vec_adds (vx0, vx4); \
|
|
t0 = vec_subs (vx0, vx4); \
|
|
t2 = vec_mradds (a0, vx6, vx2); \
|
|
t4 = vec_mradds (a0, vx2, vec_subs (zero, vx6)); \
|
|
t6 = vec_adds (t8, t3); \
|
|
t3 = vec_subs (t8, t3); \
|
|
t8 = vec_subs (t1, t7); \
|
|
t1 = vec_adds (t1, t7); \
|
|
\
|
|
/* 3rd stage */ \
|
|
t7 = vec_adds (t5, t2); \
|
|
t2 = vec_subs (t5, t2); \
|
|
t5 = vec_adds (t0, t4); \
|
|
t0 = vec_subs (t0, t4); \
|
|
t4 = vec_subs (t8, t3); \
|
|
t3 = vec_adds (t8, t3); \
|
|
\
|
|
/* 4th stage */ \
|
|
vy0 = vec_adds (t7, t1); \
|
|
vy7 = vec_subs (t7, t1); \
|
|
vy1 = vec_mradds (c4, t3, t5); \
|
|
vy6 = vec_mradds (mc4, t3, t5); \
|
|
vy2 = vec_mradds (c4, t4, t0); \
|
|
vy5 = vec_mradds (mc4, t4, t0); \
|
|
vy3 = vec_adds (t2, t6); \
|
|
vy4 = vec_subs (t2, t6);
|
|
|
|
|
|
#define IDCT \
|
|
vec_s16 vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7; \
|
|
vec_s16 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7; \
|
|
vec_s16 a0, a1, a2, ma2, c4, mc4, zero, bias; \
|
|
vec_s16 t0, t1, t2, t3, t4, t5, t6, t7, t8; \
|
|
vec_u16 shift; \
|
|
\
|
|
c4 = vec_splat (constants[0], 0); \
|
|
a0 = vec_splat (constants[0], 1); \
|
|
a1 = vec_splat (constants[0], 2); \
|
|
a2 = vec_splat (constants[0], 3); \
|
|
mc4 = vec_splat (constants[0], 4); \
|
|
ma2 = vec_splat (constants[0], 5); \
|
|
bias = (vec_s16)vec_splat ((vec_s32)constants[0], 3); \
|
|
\
|
|
zero = vec_splat_s16 (0); \
|
|
shift = vec_splat_u16 (4); \
|
|
\
|
|
vx0 = vec_mradds (vec_sl (block[0], shift), constants[1], zero); \
|
|
vx1 = vec_mradds (vec_sl (block[1], shift), constants[2], zero); \
|
|
vx2 = vec_mradds (vec_sl (block[2], shift), constants[3], zero); \
|
|
vx3 = vec_mradds (vec_sl (block[3], shift), constants[4], zero); \
|
|
vx4 = vec_mradds (vec_sl (block[4], shift), constants[1], zero); \
|
|
vx5 = vec_mradds (vec_sl (block[5], shift), constants[4], zero); \
|
|
vx6 = vec_mradds (vec_sl (block[6], shift), constants[3], zero); \
|
|
vx7 = vec_mradds (vec_sl (block[7], shift), constants[2], zero); \
|
|
\
|
|
IDCT_HALF \
|
|
\
|
|
vx0 = vec_mergeh (vy0, vy4); \
|
|
vx1 = vec_mergel (vy0, vy4); \
|
|
vx2 = vec_mergeh (vy1, vy5); \
|
|
vx3 = vec_mergel (vy1, vy5); \
|
|
vx4 = vec_mergeh (vy2, vy6); \
|
|
vx5 = vec_mergel (vy2, vy6); \
|
|
vx6 = vec_mergeh (vy3, vy7); \
|
|
vx7 = vec_mergel (vy3, vy7); \
|
|
\
|
|
vy0 = vec_mergeh (vx0, vx4); \
|
|
vy1 = vec_mergel (vx0, vx4); \
|
|
vy2 = vec_mergeh (vx1, vx5); \
|
|
vy3 = vec_mergel (vx1, vx5); \
|
|
vy4 = vec_mergeh (vx2, vx6); \
|
|
vy5 = vec_mergel (vx2, vx6); \
|
|
vy6 = vec_mergeh (vx3, vx7); \
|
|
vy7 = vec_mergel (vx3, vx7); \
|
|
\
|
|
vx0 = vec_adds (vec_mergeh (vy0, vy4), bias); \
|
|
vx1 = vec_mergel (vy0, vy4); \
|
|
vx2 = vec_mergeh (vy1, vy5); \
|
|
vx3 = vec_mergel (vy1, vy5); \
|
|
vx4 = vec_mergeh (vy2, vy6); \
|
|
vx5 = vec_mergel (vy2, vy6); \
|
|
vx6 = vec_mergeh (vy3, vy7); \
|
|
vx7 = vec_mergel (vy3, vy7); \
|
|
\
|
|
IDCT_HALF \
|
|
\
|
|
shift = vec_splat_u16 (6); \
|
|
vx0 = vec_sra (vy0, shift); \
|
|
vx1 = vec_sra (vy1, shift); \
|
|
vx2 = vec_sra (vy2, shift); \
|
|
vx3 = vec_sra (vy3, shift); \
|
|
vx4 = vec_sra (vy4, shift); \
|
|
vx5 = vec_sra (vy5, shift); \
|
|
vx6 = vec_sra (vy6, shift); \
|
|
vx7 = vec_sra (vy7, shift);
|
|
|
|
|
|
static const vec_s16 constants[5] = {
|
|
{23170, 13573, 6518, 21895, -23170, -21895, 32, 31},
|
|
{16384, 22725, 21407, 19266, 16384, 19266, 21407, 22725},
|
|
{22725, 31521, 29692, 26722, 22725, 26722, 29692, 31521},
|
|
{21407, 29692, 27969, 25172, 21407, 25172, 27969, 29692},
|
|
{19266, 26722, 25172, 22654, 19266, 22654, 25172, 26722}
|
|
};
|
|
|
|
void idct_put_altivec(uint8_t* dest, int stride, vec_s16* block)
|
|
{
|
|
POWERPC_PERF_DECLARE(altivec_idct_put_num, 1);
|
|
vec_u8 tmp;
|
|
|
|
#if CONFIG_POWERPC_PERF
|
|
POWERPC_PERF_START_COUNT(altivec_idct_put_num, 1);
|
|
#endif
|
|
IDCT
|
|
|
|
#define COPY(dest,src) \
|
|
tmp = vec_packsu (src, src); \
|
|
vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest); \
|
|
vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest);
|
|
|
|
COPY (dest, vx0) dest += stride;
|
|
COPY (dest, vx1) dest += stride;
|
|
COPY (dest, vx2) dest += stride;
|
|
COPY (dest, vx3) dest += stride;
|
|
COPY (dest, vx4) dest += stride;
|
|
COPY (dest, vx5) dest += stride;
|
|
COPY (dest, vx6) dest += stride;
|
|
COPY (dest, vx7)
|
|
|
|
POWERPC_PERF_STOP_COUNT(altivec_idct_put_num, 1);
|
|
}
|
|
|
|
void idct_add_altivec(uint8_t* dest, int stride, vec_s16* block)
|
|
{
|
|
POWERPC_PERF_DECLARE(altivec_idct_add_num, 1);
|
|
vec_u8 tmp;
|
|
vec_s16 tmp2, tmp3;
|
|
vec_u8 perm0;
|
|
vec_u8 perm1;
|
|
vec_u8 p0, p1, p;
|
|
|
|
#if CONFIG_POWERPC_PERF
|
|
POWERPC_PERF_START_COUNT(altivec_idct_add_num, 1);
|
|
#endif
|
|
|
|
IDCT
|
|
|
|
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 = (vec_s16)vec_perm (tmp, (vec_u8)zero, perm); \
|
|
tmp3 = vec_adds (tmp2, src); \
|
|
tmp = vec_packsu (tmp3, tmp3); \
|
|
vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest); \
|
|
vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest);
|
|
|
|
ADD (dest, vx0, perm0) dest += stride;
|
|
ADD (dest, vx1, perm1) dest += stride;
|
|
ADD (dest, vx2, perm0) dest += stride;
|
|
ADD (dest, vx3, perm1) dest += stride;
|
|
ADD (dest, vx4, perm0) dest += stride;
|
|
ADD (dest, vx5, perm1) dest += stride;
|
|
ADD (dest, vx6, perm0) dest += stride;
|
|
ADD (dest, vx7, perm1)
|
|
|
|
POWERPC_PERF_STOP_COUNT(altivec_idct_add_num, 1);
|
|
}
|
|
|