mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-17 06:45:05 +02:00
186 lines
5.2 KiB
C
186 lines
5.2 KiB
C
/*
|
|
* Copyright (C) 2009 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
|
|
*/
|
|
|
|
#include "libavcodec/dsputil.h"
|
|
#include "util_altivec.h"
|
|
#include "types_altivec.h"
|
|
#include "dsputil_altivec.h"
|
|
|
|
static const vec_s16 constants =
|
|
{0, 64277, 60547, 54491, 46341, 36410, 25080, 12785};
|
|
static const vec_u8 interleave_high =
|
|
{0, 1, 16, 17, 4, 5, 20, 21, 8, 9, 24, 25, 12, 13, 28, 29};
|
|
|
|
#define IDCT_START \
|
|
vec_s16 A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;\
|
|
vec_s16 Ed, Gd, Add, Bdd, Fd, Hd;\
|
|
vec_s16 eight = vec_splat_s16(8);\
|
|
vec_u16 four = vec_splat_u16(4);\
|
|
\
|
|
vec_s16 C1 = vec_splat(constants, 1);\
|
|
vec_s16 C2 = vec_splat(constants, 2);\
|
|
vec_s16 C3 = vec_splat(constants, 3);\
|
|
vec_s16 C4 = vec_splat(constants, 4);\
|
|
vec_s16 C5 = vec_splat(constants, 5);\
|
|
vec_s16 C6 = vec_splat(constants, 6);\
|
|
vec_s16 C7 = vec_splat(constants, 7);\
|
|
\
|
|
vec_s16 b0 = vec_ld(0x00, block);\
|
|
vec_s16 b1 = vec_ld(0x10, block);\
|
|
vec_s16 b2 = vec_ld(0x20, block);\
|
|
vec_s16 b3 = vec_ld(0x30, block);\
|
|
vec_s16 b4 = vec_ld(0x40, block);\
|
|
vec_s16 b5 = vec_ld(0x50, block);\
|
|
vec_s16 b6 = vec_ld(0x60, block);\
|
|
vec_s16 b7 = vec_ld(0x70, block);
|
|
|
|
// these functions do (a*C)>>16
|
|
// things are tricky because a is signed, but C unsigned.
|
|
// M15 is used if C fits in 15 bit unsigned (C6,C7)
|
|
// M16 is used if C requires 16 bits unsigned
|
|
static inline vec_s16 M15(vec_s16 a, vec_s16 C)
|
|
{
|
|
return (vec_s16)vec_perm(vec_mule(a,C), vec_mulo(a,C), interleave_high);
|
|
}
|
|
static inline vec_s16 M16(vec_s16 a, vec_s16 C)
|
|
{
|
|
return vec_add(a, M15(a, C));
|
|
}
|
|
|
|
#define IDCT_1D(ADD, SHIFT)\
|
|
A = vec_add(M16(b1, C1), M15(b7, C7));\
|
|
B = vec_sub(M15(b1, C7), M16(b7, C1));\
|
|
C = vec_add(M16(b3, C3), M16(b5, C5));\
|
|
D = vec_sub(M16(b5, C3), M16(b3, C5));\
|
|
\
|
|
Ad = M16(vec_sub(A, C), C4);\
|
|
Bd = M16(vec_sub(B, D), C4);\
|
|
\
|
|
Cd = vec_add(A, C);\
|
|
Dd = vec_add(B, D);\
|
|
\
|
|
E = ADD(M16(vec_add(b0, b4), C4));\
|
|
F = ADD(M16(vec_sub(b0, b4), C4));\
|
|
\
|
|
G = vec_add(M16(b2, C2), M15(b6, C6));\
|
|
H = vec_sub(M15(b2, C6), M16(b6, C2));\
|
|
\
|
|
Ed = vec_sub(E, G);\
|
|
Gd = vec_add(E, G);\
|
|
\
|
|
Add = vec_add(F, Ad);\
|
|
Bdd = vec_sub(Bd, H);\
|
|
\
|
|
Fd = vec_sub(F, Ad);\
|
|
Hd = vec_add(Bd, H);\
|
|
\
|
|
b0 = SHIFT(vec_add(Gd, Cd));\
|
|
b7 = SHIFT(vec_sub(Gd, Cd));\
|
|
\
|
|
b1 = SHIFT(vec_add(Add, Hd));\
|
|
b2 = SHIFT(vec_sub(Add, Hd));\
|
|
\
|
|
b3 = SHIFT(vec_add(Ed, Dd));\
|
|
b4 = SHIFT(vec_sub(Ed, Dd));\
|
|
\
|
|
b5 = SHIFT(vec_add(Fd, Bdd));\
|
|
b6 = SHIFT(vec_sub(Fd, Bdd));
|
|
|
|
#define NOP(a) a
|
|
#define ADD8(a) vec_add(a, eight)
|
|
#define SHIFT4(a) vec_sra(a, four)
|
|
|
|
void ff_vp3_idct_altivec(DCTELEM block[64])
|
|
{
|
|
IDCT_START
|
|
|
|
IDCT_1D(NOP, NOP)
|
|
TRANSPOSE8(b0, b1, b2, b3, b4, b5, b6, b7);
|
|
IDCT_1D(ADD8, SHIFT4)
|
|
|
|
vec_st(b0, 0x00, block);
|
|
vec_st(b1, 0x10, block);
|
|
vec_st(b2, 0x20, block);
|
|
vec_st(b3, 0x30, block);
|
|
vec_st(b4, 0x40, block);
|
|
vec_st(b5, 0x50, block);
|
|
vec_st(b6, 0x60, block);
|
|
vec_st(b7, 0x70, block);
|
|
}
|
|
|
|
void ff_vp3_idct_put_altivec(uint8_t *dst, int stride, DCTELEM block[64])
|
|
{
|
|
vec_u8 t;
|
|
IDCT_START
|
|
|
|
// pixels are signed; so add 128*16 in addition to the normal 8
|
|
vec_s16 v2048 = vec_sl(vec_splat_s16(1), vec_splat_u16(11));
|
|
eight = vec_add(eight, v2048);
|
|
|
|
IDCT_1D(NOP, NOP)
|
|
TRANSPOSE8(b0, b1, b2, b3, b4, b5, b6, b7);
|
|
IDCT_1D(ADD8, SHIFT4)
|
|
|
|
#define PUT(a)\
|
|
t = vec_packsu(a, a);\
|
|
vec_ste((vec_u32)t, 0, (unsigned int *)dst);\
|
|
vec_ste((vec_u32)t, 4, (unsigned int *)dst);
|
|
|
|
PUT(b0) dst += stride;
|
|
PUT(b1) dst += stride;
|
|
PUT(b2) dst += stride;
|
|
PUT(b3) dst += stride;
|
|
PUT(b4) dst += stride;
|
|
PUT(b5) dst += stride;
|
|
PUT(b6) dst += stride;
|
|
PUT(b7)
|
|
}
|
|
|
|
void ff_vp3_idct_add_altivec(uint8_t *dst, int stride, DCTELEM block[64])
|
|
{
|
|
LOAD_ZERO;
|
|
vec_u8 t, vdst;
|
|
vec_s16 vdst_16;
|
|
vec_u8 vdst_mask = vec_mergeh(vec_splat_u8(-1), vec_lvsl(0, dst));
|
|
|
|
IDCT_START
|
|
|
|
IDCT_1D(NOP, NOP)
|
|
TRANSPOSE8(b0, b1, b2, b3, b4, b5, b6, b7);
|
|
IDCT_1D(ADD8, SHIFT4)
|
|
|
|
#define ADD(a)\
|
|
vdst = vec_ld(0, dst);\
|
|
vdst_16 = (vec_s16)vec_perm(vdst, zero_u8v, vdst_mask);\
|
|
vdst_16 = vec_adds(a, vdst_16);\
|
|
t = vec_packsu(vdst_16, vdst_16);\
|
|
vec_ste((vec_u32)t, 0, (unsigned int *)dst);\
|
|
vec_ste((vec_u32)t, 4, (unsigned int *)dst);
|
|
|
|
ADD(b0) dst += stride;
|
|
ADD(b1) dst += stride;
|
|
ADD(b2) dst += stride;
|
|
ADD(b3) dst += stride;
|
|
ADD(b4) dst += stride;
|
|
ADD(b5) dst += stride;
|
|
ADD(b6) dst += stride;
|
|
ADD(b7)
|
|
}
|