/*
* SIMD-optimized forward DCT
* The gcc porting is Copyright (c) 2001 Fabrice Bellard.
* cleanup/optimizations are Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* SSE2 optimization is Copyright (c) 2004 Denes Balatoni.
*
* from fdctam32.c - AP922 MMX(3D-Now) forward-DCT
*
* Intel Application Note AP-922 - fast, precise implementation of DCT
* http://developer.intel.com/vtune/cbts/appnotes.htm
*
* Also of inspiration:
* a page about fdct at http://www.geocities.com/ssavekar/dct.htm
* Skal's fdct at http://skal.planet-d.net/coding/dct.html
*
* 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 "config.h"
#include "libavutil/attributes.h"
#include "libavutil/macros.h"
#include "libavutil/mem_internal.h"
#include "libavutil/x86/asm.h"
#include "fdct.h"
#if HAVE_SSE2_INLINE
//////////////////////////////////////////////////////////////////////
//
// constants for the forward DCT
// -----------------------------
//
// Be sure to check that your compiler is aligning all constants to QWORD
// (8-byte) memory boundaries! Otherwise the unaligned memory access will
// severely stall MMX execution.
//
//////////////////////////////////////////////////////////////////////
#define BITS_FRW_ACC
3 //; 2 or 3 for accuracy
#define SHIFT_FRW_COL BITS_FRW_ACC
#define SHIFT_FRW_ROW (BITS_FRW_ACC +
17 -
3 )
#define RND_FRW_ROW (
1 << (SHIFT_FRW_ROW-
1 ))
//#define RND_FRW_COL (1 << (SHIFT_FRW_COL-1))
#define X8(x) x,x,x,x,x,x,x,x
//concatenated table, for forward DCT transformation
DECLARE_ALIGNED(
16 ,
static const int16_t, fdct_tg_all_16)[
24 ] = {
X8(
13036 ),
// tg * (2<<16) + 0.5
X8(
27146 ),
// tg * (2<<16) + 0.5
X8(-
21746 )
// tg * (2<<16) + 0.5
};
DECLARE_ALIGNED(
16 ,
static const int16_t, ocos_4_16)[
8 ] = {
X8(
23170 )
//cos * (2<<15) + 0.5
};
DECLARE_ALIGNED(
16 ,
static const int16_t, fdct_one_corr)[
8 ] = { X8(
1 ) };
static const struct
{
DECLARE_ALIGNED(
16 ,
const int32_t, fdct_r_row_sse2)[
4 ];
} fdct_r_row_sse2 =
{{
RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW
}};
//DECLARE_ALIGNED(16, static const long, fdct_r_row_sse2)[4] = {RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW};
static const struct
{
DECLARE_ALIGNED(
16 ,
const int16_t, tab_frw_01234567_sse2)[
256 ];
} tab_frw_01234567_sse2 =
{{
//DECLARE_ALIGNED(16, static const int16_t, tab_frw_01234567_sse2)[] = { // forward_dct coeff table
#define TABLE_SSE2 C4, C4, C1, C3, -C6, -C2, -C1, -C5, \
C4, C4, C5, C7, C2, C6, C3, -C7, \
-C4, C4, C7, C3, C6, -C2, C7, -C5, \
C4, -C4, C5, -C1, C2, -C6, C3, -C1,
// c1..c7 * cos(pi/4) * 2^15
#define C1
22725
#define C2
21407
#define C3
19266
#define C4
16384
#define C5
12873
#define C6
8867
#define C7
4520
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
31521
#define C2
29692
#define C3
26722
#define C4
22725
#define C5
17855
#define C6
12299
#define C7
6270
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
29692
#define C2
27969
#define C3
25172
#define C4
21407
#define C5
16819
#define C6
11585
#define C7
5906
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
26722
#define C2
25172
#define C3
22654
#define C4
19266
#define C5
15137
#define C6
10426
#define C7
5315
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
22725
#define C2
21407
#define C3
19266
#define C4
16384
#define C5
12873
#define C6
8867
#define C7
4520
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
26722
#define C2
25172
#define C3
22654
#define C4
19266
#define C5
15137
#define C6
10426
#define C7
5315
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
29692
#define C2
27969
#define C3
25172
#define C4
21407
#define C5
16819
#define C6
11585
#define C7
5906
TABLE_SSE2
#undef C1
#undef C2
#undef C3
#undef C4
#undef C5
#undef C6
#undef C7
#define C1
31521
#define C2
29692
#define C3
26722
#define C4
22725
#define C5
17855
#define C6
12299
#define C7
6270
TABLE_SSE2
}};
#define S(s) AV_TOSTRING(s)
//AV_STRINGIFY is too long
#define FDCT_COL(cpu, mm, mov)\
static av_always_inline
void fdct_col_
## cpu(
const int16_t *in, int16_t *out,
int offset)\
{\
__asm__
volatile (\
#mov " 16(%0), %%" #mm "0 \n\t" \
#mov " 96(%0), %%" #mm "1 \n\t" \
#mov " %%" #mm "0, %%" #mm "2 \n\t" \
#mov " 32(%0), %%" #mm "3 \n\t" \
"paddsw %%" #mm "1, %%" #mm "0 \n\t" \
#mov " 80(%0), %%" #mm "4 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "0 \n\t" \
#mov " (%0), %%" #mm "5 \n\t" \
"paddsw %%" #mm "3, %%" #mm "4 \n\t" \
"paddsw 112(%0), %%" #mm "5 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "4 \n\t" \
#mov " %%" #mm "0, %%" #mm "6 \n\t" \
"psubsw %%" #mm "1, %%" #mm "2 \n\t" \
#mov " 16(%1), %%" #mm "1 \n\t" \
"psubsw %%" #mm "4, %%" #mm "0 \n\t" \
#mov " 48(%0), %%" #mm "7 \n\t" \
"pmulhw %%" #mm "0, %%" #mm "1 \n\t" \
"paddsw 64(%0), %%" #mm "7 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "5 \n\t" \
"paddsw %%" #mm "4, %%" #mm "6 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "7 \n\t" \
#mov " %%" #mm "5, %%" #mm "4 \n\t" \
"psubsw %%" #mm "7, %%" #mm "5 \n\t" \
"paddsw %%" #mm "5, %%" #mm "1 \n\t" \
"paddsw %%" #mm "7, %%" #mm "4 \n\t" \
"por (%2), %%" #mm "1 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
"+1, %%" #mm "2 \n\t" \
"pmulhw 16(%1), %%" #mm "5 \n\t" \
#mov " %%" #mm "4, %%" #mm "7 \n\t" \
"psubsw 80(%0), %%" #mm "3 \n\t" \
"psubsw %%" #mm "6, %%" #mm "4 \n\t" \
#mov " %%" #mm "1, 32(%3) \n\t" \
"paddsw %%" #mm "6, %%" #mm "7 \n\t" \
#mov " 48(%0), %%" #mm "1 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
"+1, %%" #mm "3 \n\t" \
"psubsw 64(%0), %%" #mm "1 \n\t" \
#mov " %%" #mm "2, %%" #mm "6 \n\t" \
#mov " %%" #mm "4, 64(%3) \n\t" \
"paddsw %%" #mm "3, %%" #mm "2 \n\t" \
"pmulhw (%4), %%" #mm "2 \n\t" \
"psubsw %%" #mm "3, %%" #mm "6 \n\t" \
"pmulhw (%4), %%" #mm "6 \n\t" \
"psubsw %%" #mm "0, %%" #mm "5 \n\t" \
"por (%2), %%" #mm "5 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "1 \n\t" \
"por (%2), %%" #mm "2 \n\t" \
#mov " %%" #mm "1, %%" #mm "4 \n\t" \
#mov " (%0), %%" #mm "3 \n\t" \
"paddsw %%" #mm "6, %%" #mm "1 \n\t" \
"psubsw 112(%0), %%" #mm "3 \n\t" \
"psubsw %%" #mm "6, %%" #mm "4 \n\t" \
#mov " (%1), %%" #mm "0 \n\t" \
"psllw $" S(SHIFT_FRW_COL)
", %%" #mm "3 \n\t" \
#mov " 32(%1), %%" #mm "6 \n\t" \
"pmulhw %%" #mm "1, %%" #mm "0 \n\t" \
#mov " %%" #mm "7, (%3) \n\t" \
"pmulhw %%" #mm "4, %%" #mm "6 \n\t" \
#mov " %%" #mm "5, 96(%3) \n\t" \
#mov " %%" #mm "3, %%" #mm "7 \n\t" \
#mov " 32(%1), %%" #mm "5 \n\t" \
"psubsw %%" #mm "2, %%" #mm "7 \n\t" \
"paddsw %%" #mm "2, %%" #mm "3 \n\t" \
"pmulhw %%" #mm "7, %%" #mm "5 \n\t" \
"paddsw %%" #mm "3, %%" #mm "0 \n\t" \
"paddsw %%" #mm "4, %%" #mm "6 \n\t" \
"pmulhw (%1), %%" #mm "3 \n\t" \
"por (%2), %%" #mm "0 \n\t" \
"paddsw %%" #mm "7, %%" #mm "5 \n\t" \
"psubsw %%" #mm "6, %%" #mm "7 \n\t" \
#mov " %%" #mm "0, 16(%3) \n\t" \
"paddsw %%" #mm "4, %%" #mm "5 \n\t" \
#mov " %%" #mm "7, 48(%3) \n\t" \
"psubsw %%" #mm "1, %%" #mm "3 \n\t" \
#mov " %%" #mm "5, 80(%3) \n\t" \
#mov " %%" #mm "3, 112(%3) \n\t" \
: \
:
"r" (in + offset),
"r" (fdct_tg_all_16),
"r" (fdct_one_corr), \
"r" (out + offset),
"r" (ocos_4_16)); \
}
FDCT_COL(sse2, xmm, movdqa)
static av_always_inline
void fdct_row_sse2(
const int16_t *in, int16_t *out)
{
__asm__
volatile (
#define FDCT_ROW_SSE2_H1(i,t) \
"movq " #i "(%0), %%xmm2 \n\t" \
"movq " #i "+8(%0), %%xmm0 \n\t" \
"movdqa " #t "+32(%1), %%xmm3 \n\t" \
"movdqa " #t "+48(%1), %%xmm7 \n\t" \
"movdqa " #t "(%1), %%xmm4 \n\t" \
"movdqa " #t "+16(%1), %%xmm5 \n\t"
#define FDCT_ROW_SSE2_H2(i,t) \
"movq " #i "(%0), %%xmm2 \n\t" \
"movq " #i "+8(%0), %%xmm0 \n\t" \
"movdqa " #t "+32(%1), %%xmm3 \n\t" \
"movdqa " #t "+48(%1), %%xmm7 \n\t"
#define FDCT_ROW_SSE2(i) \
"movq %%xmm2, %%xmm1 \n\t" \
"pshuflw $27, %%xmm0, %%xmm0 \n\t" \
"paddsw %%xmm0, %%xmm1 \n\t" \
"psubsw %%xmm0, %%xmm2 \n\t" \
"punpckldq %%xmm2, %%xmm1 \n\t" \
"pshufd $78, %%xmm1, %%xmm2 \n\t" \
"pmaddwd %%xmm2, %%xmm3 \n\t" \
"pmaddwd %%xmm1, %%xmm7 \n\t" \
"pmaddwd %%xmm5, %%xmm2 \n\t" \
"pmaddwd %%xmm4, %%xmm1 \n\t" \
"paddd %%xmm7, %%xmm3 \n\t" \
"paddd %%xmm2, %%xmm1 \n\t" \
"paddd %%xmm6, %%xmm3 \n\t" \
"paddd %%xmm6, %%xmm1 \n\t" \
"psrad %3, %%xmm3 \n\t" \
"psrad %3, %%xmm1 \n\t" \
"packssdw %%xmm3, %%xmm1 \n\t" \
"movdqa %%xmm1, " #i "(%4) \n\t"
"movdqa (%2), %%xmm6 \n\t"
FDCT_ROW_SSE2_H1(
0 ,
0 )
FDCT_ROW_SSE2(
0 )
FDCT_ROW_SSE2_H2(
64 ,
0 )
FDCT_ROW_SSE2(
64 )
FDCT_ROW_SSE2_H1(
16 ,
64 )
FDCT_ROW_SSE2(
16 )
FDCT_ROW_SSE2_H2(
112 ,
64 )
FDCT_ROW_SSE2(
112 )
FDCT_ROW_SSE2_H1(
32 ,
128 )
FDCT_ROW_SSE2(
32 )
FDCT_ROW_SSE2_H2(
96 ,
128 )
FDCT_ROW_SSE2(
96 )
FDCT_ROW_SSE2_H1(
48 ,
192 )
FDCT_ROW_SSE2(
48 )
FDCT_ROW_SSE2_H2(
80 ,
192 )
FDCT_ROW_SSE2(
80 )
:
:
"r" (in),
"r" (tab_frw_01234567_sse2.tab_frw_01234567_sse2),
"r" (fdct_r_row_sse2.fdct_r_row_sse2),
"i" (SHIFT_FRW_ROW),
"r" (out)
XMM_CLOBBERS_ONLY(
"%xmm0" ,
"%xmm1" ,
"%xmm2" ,
"%xmm3" ,
"%xmm4" ,
"%xmm5" ,
"%xmm6" ,
"%xmm7" )
);
}
void ff_fdct_sse2(int16_t *block)
{
DECLARE_ALIGNED(
16 , int64_t, align_tmp)[
16 ];
int16_t *
const block1= (int16_t*)align_tmp;
fdct_col_sse2(block, block1,
0 );
fdct_row_sse2(block1, block);
}
#endif /* HAVE_SSE2_INLINE */
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