/* * AltiVec-enhanced yuv2yuvX * * Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> * based on the equivalent C code in swscale.c * * 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 <inttypes.h> #include "config.h" #include "libswscale/swscale.h" #include "libswscale/swscale_internal.h" #include "libavutil/attributes.h" #include "libavutil/cpu.h" #include "yuv2rgb_altivec.h" #include "libavutil/ppc/util_altivec.h" #if HAVE_ALTIVEC #if HAVE_BIGENDIAN #define vzero vec_splat_s32(0) #define GET_LS(a,b,c,s) {\ vector signed short l2 = vec_ld(((b) << 1) + 16, s);\ ls = vec_perm(a, l2, c);\ a = l2;\ } #define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do {\ vector signed short ls;\ vector signed int vf1, vf2, i1, i2;\ GET_LS(l1, x, perm, src);\ i1 = vec_mule(filter, ls);\ i2 = vec_mulo(filter, ls);\ vf1 = vec_mergeh(i1, i2);\ vf2 = vec_mergel(i1, i2);\ d1 = vec_add(d1, vf1);\ d2 = vec_add(d2, vf2);\ } while (0) #define LOAD_FILTER(vf,f) {\ vector unsigned char perm0 = vec_lvsl(joffset, f);\ vf = vec_ld(joffset, f);\ vf = vec_perm(vf, vf, perm0);\ } #define LOAD_L1(ll1,s,p){\ p = vec_lvsl(xoffset, s);\ ll1 = vec_ld(xoffset, s);\ } // The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2). // The neat trick: We only care for half the elements, // high or low depending on (i<<3)%16 (it's 0 or 8 here), // and we're going to use vec_mule, so we choose // carefully how to "unpack" the elements into the even slots. #define GET_VF4(a, vf, f) {\ vf = vec_ld(a<< 3, f);\ if ((a << 3) % 16)\ vf = vec_mergel(vf, (vector signed short)vzero);\ else\ vf = vec_mergeh(vf, (vector signed short)vzero);\ } #define FIRST_LOAD(sv, pos, s, per) {\ sv = vec_ld(pos, s);\ per = vec_lvsl(pos, s);\ } #define UPDATE_PTR(s0, d0, s1, d1) {\ d0 = s0;\ d1 = s1;\ } #define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\ v1 = vec_ld(pos + a + 16, s);\ vf = vec_perm(v0, v1, per);\ } #define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) {\ if ((((uintptr_t)s + pos) % 16) > 8) {\ v1 = vec_ld(pos + a + 16, s);\ }\ vf = vec_perm(v0, src_v1, per);\ } #define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\ vf1 = vec_ld((a * 2 * filterSize) + (b * 2) + 16 + off, f);\ vf = vec_perm(vf0, vf1, per);\ } #define FUNC(name) name ## _altivec #include "swscale_ppc_template.c" #undef FUNC #undef vzero #endif /* HAVE_BIGENDIAN */ #define output_pixel(pos, val, bias, signedness) \ if (big_endian) { \ AV_WB16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \ } else { \ AV_WL16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \ } static void yuv2plane1_float_u(const int32_t *src, float *dest, int dstW, int start) { static const int big_endian = HAVE_BIGENDIAN; static const int shift = 3; static const float float_mult = 1.0f / 65535.0f; int i, val; uint16_t val_uint; for (i = start; i < dstW; ++i){ val = src[i] + (1 << (shift - 1)); output_pixel(&val_uint, val, 0, uint); dest[i] = float_mult * (float)val_uint; } } static void yuv2plane1_float_bswap_u(const int32_t *src, uint32_t *dest, int dstW, int start) { static const int big_endian = HAVE_BIGENDIAN; static const int shift = 3; static const float float_mult = 1.0f / 65535.0f; int i, val; uint16_t val_uint; for (i = start; i < dstW; ++i){ val = src[i] + (1 << (shift - 1)); output_pixel(&val_uint, val, 0, uint); dest[i] = av_bswap32(av_float2int(float_mult * (float)val_uint)); } } static void yuv2plane1_float_altivec(const int32_t *src, float *dest, int dstW) { const int dst_u = -(uintptr_t)dest & 3; const int shift = 3; const int add = (1 << (shift - 1)); const int clip = (1 << 16) - 1; const float fmult = 1.0f / 65535.0f; const vec_u32 vadd = (vec_u32) {add, add, add, add}; const vec_u32 vshift = (vec_u32) vec_splat_u32(shift); const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip}; const vec_f vmul = (vec_f) {fmult, fmult, fmult, fmult}; const vec_f vzero = (vec_f) {0, 0, 0, 0}; vec_u32 v; vec_f vd; int i; yuv2plane1_float_u(src, dest, dst_u, 0); for (i = dst_u; i < dstW - 3; i += 4) { v = vec_ld(0, (const uint32_t *) &src[i]); v = vec_add(v, vadd); v = vec_sr(v, vshift); v = vec_min(v, vlargest); vd = vec_ctf(v, 0); vd = vec_madd(vd, vmul, vzero); vec_st(vd, 0, &dest[i]); } yuv2plane1_float_u(src, dest, dstW, i); } static void yuv2plane1_float_bswap_altivec(const int32_t *src, uint32_t *dest, int dstW) { const int dst_u = -(uintptr_t)dest & 3; const int shift = 3; const int add = (1 << (shift - 1)); const int clip = (1 << 16) - 1; const float fmult = 1.0f / 65535.0f; const vec_u32 vadd = (vec_u32) {add, add, add, add}; const vec_u32 vshift = (vec_u32) vec_splat_u32(shift); const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip}; const vec_f vmul = (vec_f) {fmult, fmult, fmult, fmult}; const vec_f vzero = (vec_f) {0, 0, 0, 0}; const vec_u32 vswapbig = (vec_u32) {16, 16, 16, 16}; const vec_u16 vswapsmall = vec_splat_u16(8); vec_u32 v; vec_f vd; int i; yuv2plane1_float_bswap_u(src, dest, dst_u, 0); for (i = dst_u; i < dstW - 3; i += 4) { v = vec_ld(0, (const uint32_t *) &src[i]); v = vec_add(v, vadd); v = vec_sr(v, vshift); v = vec_min(v, vlargest); vd = vec_ctf(v, 0); vd = vec_madd(vd, vmul, vzero); vd = (vec_f) vec_rl((vec_u32) vd, vswapbig); vd = (vec_f) vec_rl((vec_u16) vd, vswapsmall); vec_st(vd, 0, (float *) &dest[i]); } yuv2plane1_float_bswap_u(src, dest, dstW, i); } #define yuv2plane1_float(template, dest_type, BE_LE) \ static void yuv2plane1_float ## BE_LE ## _altivec(const int16_t *src, uint8_t *dest, \ int dstW, \ const uint8_t *dither, int offset) \ { \ template((const int32_t *)src, (dest_type *)dest, dstW); \ } #if HAVE_BIGENDIAN yuv2plane1_float(yuv2plane1_float_altivec, float, BE) yuv2plane1_float(yuv2plane1_float_bswap_altivec, uint32_t, LE) #else yuv2plane1_float(yuv2plane1_float_altivec, float, LE) yuv2plane1_float(yuv2plane1_float_bswap_altivec, uint32_t, BE) #endif #endif /* HAVE_ALTIVEC */ av_cold void ff_sws_init_swscale_ppc(SwsContext *c) { #if HAVE_ALTIVEC enum AVPixelFormat dstFormat = c->dstFormat; if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) return; #if HAVE_BIGENDIAN if (c->srcBpc == 8 && c->dstBpc <= 14) { c->hyScale = c->hcScale = hScale_real_altivec; } if (!is16BPS(dstFormat) && !isNBPS(dstFormat) && !isSemiPlanarYUV(dstFormat) && dstFormat != AV_PIX_FMT_GRAYF32BE && dstFormat != AV_PIX_FMT_GRAYF32LE && !c->needAlpha) { c->yuv2planeX = yuv2planeX_altivec; } #endif if (dstFormat == AV_PIX_FMT_GRAYF32BE) { c->yuv2plane1 = yuv2plane1_floatBE_altivec; } else if (dstFormat == AV_PIX_FMT_GRAYF32LE) { c->yuv2plane1 = yuv2plane1_floatLE_altivec; } /* The following list of supported dstFormat values should * match what's found in the body of ff_yuv2packedX_altivec() */ if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) { switch (c->dstFormat) { case AV_PIX_FMT_ABGR: c->yuv2packedX = ff_yuv2abgr_X_altivec; break; case AV_PIX_FMT_BGRA: c->yuv2packedX = ff_yuv2bgra_X_altivec; break; case AV_PIX_FMT_ARGB: c->yuv2packedX = ff_yuv2argb_X_altivec; break; case AV_PIX_FMT_RGBA: c->yuv2packedX = ff_yuv2rgba_X_altivec; break; case AV_PIX_FMT_BGR24: c->yuv2packedX = ff_yuv2bgr24_X_altivec; break; case AV_PIX_FMT_RGB24: c->yuv2packedX = ff_yuv2rgb24_X_altivec; break; } } #endif /* HAVE_ALTIVEC */ ff_sws_init_swscale_vsx(c); }