/*
* 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 ( 3 D - 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
// -----------------------------
//
//////////////////////////////////////////////////////////////////////
#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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