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ffmpeg/libavcodec/ppc/fdctdsp.c
Rong Yan 8a03d428f1 avcodec/ppc/fdctdsp: POWER LE support in ff_fdct_altivec() delete macros VEC_FMERGEH() VEC_FMERGEL(), they where wrong 
GCC tool had a bug of PPC intrinsic interpret, which has been fixed in GCC 4.9.1. This bug lead to
errors in two of our previous patches. We found this when we update our GCC tools to 4.9.1 and by
reading the related info on GCC website. We fix our previous error in two separate commits

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2015-04-27 12:59:15 +02:00

480 lines
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/*
* Copyright (C) 2003 James Klicman <james@klicman.org>
*
* 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"
#if HAVE_ALTIVEC_H
#include <altivec.h>
#endif
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/ppc/cpu.h"
#include "libavcodec/fdctdsp.h"
#include "fdct.h"
#if HAVE_ALTIVEC
#define vs16(v) ((vector signed short) (v))
#define vs32(v) ((vector signed int) (v))
#define vu8(v) ((vector unsigned char) (v))
#define vu16(v) ((vector unsigned short) (v))
#define vu32(v) ((vector unsigned int) (v))
#define C1 0.98078525066375732421875000 /* cos(1 * PI / 16) */
#define C2 0.92387950420379638671875000 /* cos(2 * PI / 16) */
#define C3 0.83146959543228149414062500 /* cos(3 * PI / 16) */
#define C4 0.70710676908493041992187500 /* cos(4 * PI / 16) */
#define C5 0.55557024478912353515625000 /* cos(5 * PI / 16) */
#define C6 0.38268342614173889160156250 /* cos(6 * PI / 16) */
#define C7 0.19509032368659973144531250 /* cos(7 * PI / 16) */
#define SQRT_2 1.41421353816986083984375000 /* sqrt(2) */
#define W0 -(2 * C2)
#define W1 (2 * C6)
#define W2 (SQRT_2 * C6)
#define W3 (SQRT_2 * C3)
#define W4 (SQRT_2 * (-C1 + C3 + C5 - C7))
#define W5 (SQRT_2 * (C1 + C3 - C5 + C7))
#define W6 (SQRT_2 * (C1 + C3 + C5 - C7))
#define W7 (SQRT_2 * (C1 + C3 - C5 - C7))
#define W8 (SQRT_2 * (C7 - C3))
#define W9 (SQRT_2 * (-C1 - C3))
#define WA (SQRT_2 * (-C3 - C5))
#define WB (SQRT_2 * (C5 - C3))
static const vector float fdctconsts[3] = {
{ W0, W1, W2, W3 },
{ W4, W5, W6, W7 },
{ W8, W9, WA, WB }
};
#define LD_W0 vec_splat(cnsts0, 0)
#define LD_W1 vec_splat(cnsts0, 1)
#define LD_W2 vec_splat(cnsts0, 2)
#define LD_W3 vec_splat(cnsts0, 3)
#define LD_W4 vec_splat(cnsts1, 0)
#define LD_W5 vec_splat(cnsts1, 1)
#define LD_W6 vec_splat(cnsts1, 2)
#define LD_W7 vec_splat(cnsts1, 3)
#define LD_W8 vec_splat(cnsts2, 0)
#define LD_W9 vec_splat(cnsts2, 1)
#define LD_WA vec_splat(cnsts2, 2)
#define LD_WB vec_splat(cnsts2, 3)
#define FDCTROW(b0, b1, b2, b3, b4, b5, b6, b7) /* {{{ */ \
x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \
x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \
x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \
x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \
x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \
x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \
x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \
x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \
\
b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \
b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \
b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \
b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \
\
b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \
b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \
b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \
cnst = LD_W2; \
b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \
cnst = LD_W1; \
b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \
cnst = LD_W0; \
b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \
\
x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \
x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \
x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \
x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \
x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \
cnst = LD_W3; \
x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \
\
cnst = LD_W8; \
x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \
cnst = LD_W9; \
x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \
cnst = LD_WA; \
x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \
cnst = LD_WB; \
x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \
\
cnst = LD_W4; \
b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \
cnst = LD_W5; \
b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \
cnst = LD_W6; \
b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \
cnst = LD_W7; \
b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \
\
b7 = vec_add(b7, x2); /* b7 = b7 + x2; */ \
b5 = vec_add(b5, x3); /* b5 = b5 + x3; */ \
b3 = vec_add(b3, x2); /* b3 = b3 + x2; */ \
b1 = vec_add(b1, x3) /* b1 = b1 + x3; */ \
/* }}} */
#define FDCTCOL(b0, b1, b2, b3, b4, b5, b6, b7) /* {{{ */ \
x0 = vec_add(b0, b7); /* x0 = b0 + b7; */ \
x7 = vec_sub(b0, b7); /* x7 = b0 - b7; */ \
x1 = vec_add(b1, b6); /* x1 = b1 + b6; */ \
x6 = vec_sub(b1, b6); /* x6 = b1 - b6; */ \
x2 = vec_add(b2, b5); /* x2 = b2 + b5; */ \
x5 = vec_sub(b2, b5); /* x5 = b2 - b5; */ \
x3 = vec_add(b3, b4); /* x3 = b3 + b4; */ \
x4 = vec_sub(b3, b4); /* x4 = b3 - b4; */ \
\
b7 = vec_add(x0, x3); /* b7 = x0 + x3; */ \
b1 = vec_add(x1, x2); /* b1 = x1 + x2; */ \
b0 = vec_add(b7, b1); /* b0 = b7 + b1; */ \
b4 = vec_sub(b7, b1); /* b4 = b7 - b1; */ \
\
b2 = vec_sub(x0, x3); /* b2 = x0 - x3; */ \
b6 = vec_sub(x1, x2); /* b6 = x1 - x2; */ \
b5 = vec_add(b6, b2); /* b5 = b6 + b2; */ \
cnst = LD_W2; \
b5 = vec_madd(cnst, b5, mzero); /* b5 = b5 * W2; */ \
cnst = LD_W1; \
b2 = vec_madd(cnst, b2, b5); /* b2 = b5 + b2 * W1; */ \
cnst = LD_W0; \
b6 = vec_madd(cnst, b6, b5); /* b6 = b5 + b6 * W0; */ \
\
x0 = vec_add(x4, x7); /* x0 = x4 + x7; */ \
x1 = vec_add(x5, x6); /* x1 = x5 + x6; */ \
x2 = vec_add(x4, x6); /* x2 = x4 + x6; */ \
x3 = vec_add(x5, x7); /* x3 = x5 + x7; */ \
x8 = vec_add(x2, x3); /* x8 = x2 + x3; */ \
cnst = LD_W3; \
x8 = vec_madd(cnst, x8, mzero); /* x8 = x8 * W3; */ \
\
cnst = LD_W8; \
x0 = vec_madd(cnst, x0, mzero); /* x0 *= W8; */ \
cnst = LD_W9; \
x1 = vec_madd(cnst, x1, mzero); /* x1 *= W9; */ \
cnst = LD_WA; \
x2 = vec_madd(cnst, x2, x8); /* x2 = x2 * WA + x8; */ \
cnst = LD_WB; \
x3 = vec_madd(cnst, x3, x8); /* x3 = x3 * WB + x8; */ \
\
cnst = LD_W4; \
b7 = vec_madd(cnst, x4, x0); /* b7 = x4 * W4 + x0; */ \
cnst = LD_W5; \
b5 = vec_madd(cnst, x5, x1); /* b5 = x5 * W5 + x1; */ \
cnst = LD_W6; \
b3 = vec_madd(cnst, x6, x1); /* b3 = x6 * W6 + x1; */ \
cnst = LD_W7; \
b1 = vec_madd(cnst, x7, x0); /* b1 = x7 * W7 + x0; */ \
\
b7 = vec_add(b7, x2); /* b7 += x2; */ \
b5 = vec_add(b5, x3); /* b5 += x3; */ \
b3 = vec_add(b3, x2); /* b3 += x2; */ \
b1 = vec_add(b1, x3) /* b1 += x3; */ \
/* }}} */
/* two dimensional discrete cosine transform */
void ff_fdct_altivec(int16_t *block)
{
vector signed short *bp;
const vector float *cp = fdctconsts;
vector float b00, b10, b20, b30, b40, b50, b60, b70;
vector float b01, b11, b21, b31, b41, b51, b61, b71;
vector float mzero, cnst, cnsts0, cnsts1, cnsts2;
vector float x0, x1, x2, x3, x4, x5, x6, x7, x8;
/* setup constants {{{ */
/* mzero = -0.0 */
mzero = ((vector float) vec_splat_u32(-1));
mzero = ((vector float) vec_sl(vu32(mzero), vu32(mzero)));
cnsts0 = vec_ld(0, cp);
cp++;
cnsts1 = vec_ld(0, cp);
cp++;
cnsts2 = vec_ld(0, cp);
/* }}} */
/* 8x8 matrix transpose (vector short[8]) {{{ */
#define MERGE_S16(hl, a, b) vec_merge ## hl(vs16(a), vs16(b))
bp = (vector signed short *) block;
b00 = ((vector float) vec_ld(0, bp));
b40 = ((vector float) vec_ld(16 * 4, bp));
b01 = ((vector float) MERGE_S16(h, b00, b40));
b11 = ((vector float) MERGE_S16(l, b00, b40));
bp++;
b10 = ((vector float) vec_ld(0, bp));
b50 = ((vector float) vec_ld(16 * 4, bp));
b21 = ((vector float) MERGE_S16(h, b10, b50));
b31 = ((vector float) MERGE_S16(l, b10, b50));
bp++;
b20 = ((vector float) vec_ld(0, bp));
b60 = ((vector float) vec_ld(16 * 4, bp));
b41 = ((vector float) MERGE_S16(h, b20, b60));
b51 = ((vector float) MERGE_S16(l, b20, b60));
bp++;
b30 = ((vector float) vec_ld(0, bp));
b70 = ((vector float) vec_ld(16 * 4, bp));
b61 = ((vector float) MERGE_S16(h, b30, b70));
b71 = ((vector float) MERGE_S16(l, b30, b70));
x0 = ((vector float) MERGE_S16(h, b01, b41));
x1 = ((vector float) MERGE_S16(l, b01, b41));
x2 = ((vector float) MERGE_S16(h, b11, b51));
x3 = ((vector float) MERGE_S16(l, b11, b51));
x4 = ((vector float) MERGE_S16(h, b21, b61));
x5 = ((vector float) MERGE_S16(l, b21, b61));
x6 = ((vector float) MERGE_S16(h, b31, b71));
x7 = ((vector float) MERGE_S16(l, b31, b71));
b00 = ((vector float) MERGE_S16(h, x0, x4));
b10 = ((vector float) MERGE_S16(l, x0, x4));
b20 = ((vector float) MERGE_S16(h, x1, x5));
b30 = ((vector float) MERGE_S16(l, x1, x5));
b40 = ((vector float) MERGE_S16(h, x2, x6));
b50 = ((vector float) MERGE_S16(l, x2, x6));
b60 = ((vector float) MERGE_S16(h, x3, x7));
b70 = ((vector float) MERGE_S16(l, x3, x7));
#undef MERGE_S16
/* }}} */
/* Some of the initial calculations can be done as vector short
* before conversion to vector float. The following code section
* takes advantage of this. */
/* fdct rows {{{ */
x0 = ((vector float) vec_add(vs16(b00), vs16(b70)));
x7 = ((vector float) vec_sub(vs16(b00), vs16(b70)));
x1 = ((vector float) vec_add(vs16(b10), vs16(b60)));
x6 = ((vector float) vec_sub(vs16(b10), vs16(b60)));
x2 = ((vector float) vec_add(vs16(b20), vs16(b50)));
x5 = ((vector float) vec_sub(vs16(b20), vs16(b50)));
x3 = ((vector float) vec_add(vs16(b30), vs16(b40)));
x4 = ((vector float) vec_sub(vs16(b30), vs16(b40)));
b70 = ((vector float) vec_add(vs16(x0), vs16(x3)));
b10 = ((vector float) vec_add(vs16(x1), vs16(x2)));
b00 = ((vector float) vec_add(vs16(b70), vs16(b10)));
b40 = ((vector float) vec_sub(vs16(b70), vs16(b10)));
#define CTF0(n) \
b ## n ## 1 = ((vector float) vec_unpackl(vs16(b ## n ## 0))); \
b ## n ## 0 = ((vector float) vec_unpackh(vs16(b ## n ## 0))); \
b ## n ## 1 = vec_ctf(vs32(b ## n ## 1), 0); \
b ## n ## 0 = vec_ctf(vs32(b ## n ## 0), 0)
CTF0(0);
CTF0(4);
b20 = ((vector float) vec_sub(vs16(x0), vs16(x3)));
b60 = ((vector float) vec_sub(vs16(x1), vs16(x2)));
CTF0(2);
CTF0(6);
#undef CTF0
x0 = vec_add(b60, b20);
x1 = vec_add(b61, b21);
cnst = LD_W2;
x0 = vec_madd(cnst, x0, mzero);
x1 = vec_madd(cnst, x1, mzero);
cnst = LD_W1;
b20 = vec_madd(cnst, b20, x0);
b21 = vec_madd(cnst, b21, x1);
cnst = LD_W0;
b60 = vec_madd(cnst, b60, x0);
b61 = vec_madd(cnst, b61, x1);
#define CTFX(x, b) \
b ## 0 = ((vector float) vec_unpackh(vs16(x))); \
b ## 1 = ((vector float) vec_unpackl(vs16(x))); \
b ## 0 = vec_ctf(vs32(b ## 0), 0); \
b ## 1 = vec_ctf(vs32(b ## 1), 0)
CTFX(x4, b7);
CTFX(x5, b5);
CTFX(x6, b3);
CTFX(x7, b1);
#undef CTFX
x0 = vec_add(b70, b10);
x1 = vec_add(b50, b30);
x2 = vec_add(b70, b30);
x3 = vec_add(b50, b10);
x8 = vec_add(x2, x3);
cnst = LD_W3;
x8 = vec_madd(cnst, x8, mzero);
cnst = LD_W8;
x0 = vec_madd(cnst, x0, mzero);
cnst = LD_W9;
x1 = vec_madd(cnst, x1, mzero);
cnst = LD_WA;
x2 = vec_madd(cnst, x2, x8);
cnst = LD_WB;
x3 = vec_madd(cnst, x3, x8);
cnst = LD_W4;
b70 = vec_madd(cnst, b70, x0);
cnst = LD_W5;
b50 = vec_madd(cnst, b50, x1);
cnst = LD_W6;
b30 = vec_madd(cnst, b30, x1);
cnst = LD_W7;
b10 = vec_madd(cnst, b10, x0);
b70 = vec_add(b70, x2);
b50 = vec_add(b50, x3);
b30 = vec_add(b30, x2);
b10 = vec_add(b10, x3);
x0 = vec_add(b71, b11);
x1 = vec_add(b51, b31);
x2 = vec_add(b71, b31);
x3 = vec_add(b51, b11);
x8 = vec_add(x2, x3);
cnst = LD_W3;
x8 = vec_madd(cnst, x8, mzero);
cnst = LD_W8;
x0 = vec_madd(cnst, x0, mzero);
cnst = LD_W9;
x1 = vec_madd(cnst, x1, mzero);
cnst = LD_WA;
x2 = vec_madd(cnst, x2, x8);
cnst = LD_WB;
x3 = vec_madd(cnst, x3, x8);
cnst = LD_W4;
b71 = vec_madd(cnst, b71, x0);
cnst = LD_W5;
b51 = vec_madd(cnst, b51, x1);
cnst = LD_W6;
b31 = vec_madd(cnst, b31, x1);
cnst = LD_W7;
b11 = vec_madd(cnst, b11, x0);
b71 = vec_add(b71, x2);
b51 = vec_add(b51, x3);
b31 = vec_add(b31, x2);
b11 = vec_add(b11, x3);
/* }}} */
/* 8x8 matrix transpose (vector float[8][2]) {{{ */
x0 = vec_mergel(b00, b20);
x1 = vec_mergeh(b00, b20);
x2 = vec_mergel(b10, b30);
x3 = vec_mergeh(b10, b30);
b00 = vec_mergeh(x1, x3);
b10 = vec_mergel(x1, x3);
b20 = vec_mergeh(x0, x2);
b30 = vec_mergel(x0, x2);
x4 = vec_mergel(b41, b61);
x5 = vec_mergeh(b41, b61);
x6 = vec_mergel(b51, b71);
x7 = vec_mergeh(b51, b71);
b41 = vec_mergeh(x5, x7);
b51 = vec_mergel(x5, x7);
b61 = vec_mergeh(x4, x6);
b71 = vec_mergel(x4, x6);
x0 = vec_mergel(b01, b21);
x1 = vec_mergeh(b01, b21);
x2 = vec_mergel(b11, b31);
x3 = vec_mergeh(b11, b31);
x4 = vec_mergel(b40, b60);
x5 = vec_mergeh(b40, b60);
x6 = vec_mergel(b50, b70);
x7 = vec_mergeh(b50, b70);
b40 = vec_mergeh(x1, x3);
b50 = vec_mergel(x1, x3);
b60 = vec_mergeh(x0, x2);
b70 = vec_mergel(x0, x2);
b01 = vec_mergeh(x5, x7);
b11 = vec_mergel(x5, x7);
b21 = vec_mergeh(x4, x6);
b31 = vec_mergel(x4, x6);
/* }}} */
FDCTCOL(b00, b10, b20, b30, b40, b50, b60, b70);
FDCTCOL(b01, b11, b21, b31, b41, b51, b61, b71);
/* round, convert back to short {{{ */
#define CTS(n) \
b ## n ## 0 = vec_round(b ## n ## 0); \
b ## n ## 1 = vec_round(b ## n ## 1); \
b ## n ## 0 = ((vector float) vec_cts(b ## n ## 0, 0)); \
b ## n ## 1 = ((vector float) vec_cts(b ## n ## 1, 0)); \
b ## n ## 0 = ((vector float) vec_pack(vs32(b ## n ## 0), \
vs32(b ## n ## 1))); \
vec_st(vs16(b ## n ## 0), 0, bp)
bp = (vector signed short *) block;
CTS(0);
bp++;
CTS(1);
bp++;
CTS(2);
bp++;
CTS(3);
bp++;
CTS(4);
bp++;
CTS(5);
bp++;
CTS(6);
bp++;
CTS(7);
#undef CTS
/* }}} */
}
#endif /* HAVE_ALTIVEC */
av_cold void ff_fdctdsp_init_ppc(FDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth)
{
#if HAVE_ALTIVEC
if (!PPC_ALTIVEC(av_get_cpu_flags()))
return;
if (!high_bit_depth) {
if (avctx->dct_algo == FF_DCT_AUTO ||
avctx->dct_algo == FF_DCT_ALTIVEC) {
c->fdct = ff_fdct_altivec;
}
}
#endif /* HAVE_ALTIVEC */
}
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