/* * Copyright (C) 2003 James Klicman * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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 #endif #include "libavutil/attributes.h" #include "libavutil/cpu.h" #include "libavutil/ppc/cpu.h" #include "libavcodec/fdctdsp.h" #include "fdct.h" #if HAVE_ALTIVEC && HAVE_BIGENDIAN #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 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; 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 && HAVE_BIGENDIAN */ av_cold void ff_fdctdsp_init_ppc(FDCTDSPContext *c, AVCodecContext *avctx, unsigned high_bit_depth) { #if HAVE_ALTIVEC && HAVE_BIGENDIAN 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 && HAVE_BIGENDIAN */ }