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284 lines
8.6 KiB
284 lines
8.6 KiB
/* |
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* AltiVec-enhanced yuv2yuvX |
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* |
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* Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org> |
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* based on the equivalent C code in swscale.c |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <inttypes.h> |
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#include "config.h" |
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#include "libswscale/swscale.h" |
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#include "libswscale/swscale_internal.h" |
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#include "libavutil/attributes.h" |
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#include "libavutil/cpu.h" |
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#include "yuv2rgb_altivec.h" |
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#include "libavutil/ppc/util_altivec.h" |
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#if HAVE_ALTIVEC |
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#if HAVE_BIGENDIAN |
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#define vzero vec_splat_s32(0) |
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#define GET_LS(a,b,c,s) {\ |
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vector signed short l2 = vec_ld(((b) << 1) + 16, s);\ |
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ls = vec_perm(a, l2, c);\ |
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a = l2;\ |
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} |
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#define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do {\ |
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vector signed short ls;\ |
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vector signed int vf1, vf2, i1, i2;\ |
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GET_LS(l1, x, perm, src);\ |
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i1 = vec_mule(filter, ls);\ |
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i2 = vec_mulo(filter, ls);\ |
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vf1 = vec_mergeh(i1, i2);\ |
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vf2 = vec_mergel(i1, i2);\ |
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d1 = vec_add(d1, vf1);\ |
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d2 = vec_add(d2, vf2);\ |
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} while (0) |
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#define LOAD_FILTER(vf,f) {\ |
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vector unsigned char perm0 = vec_lvsl(joffset, f);\ |
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vf = vec_ld(joffset, f);\ |
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vf = vec_perm(vf, vf, perm0);\ |
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} |
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#define LOAD_L1(ll1,s,p){\ |
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p = vec_lvsl(xoffset, s);\ |
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ll1 = vec_ld(xoffset, s);\ |
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} |
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// The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2). |
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// The neat trick: We only care for half the elements, |
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// high or low depending on (i<<3)%16 (it's 0 or 8 here), |
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// and we're going to use vec_mule, so we choose |
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// carefully how to "unpack" the elements into the even slots. |
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#define GET_VF4(a, vf, f) {\ |
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vf = vec_ld(a<< 3, f);\ |
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if ((a << 3) % 16)\ |
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vf = vec_mergel(vf, (vector signed short)vzero);\ |
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else\ |
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vf = vec_mergeh(vf, (vector signed short)vzero);\ |
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} |
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#define FIRST_LOAD(sv, pos, s, per) {\ |
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sv = vec_ld(pos, s);\ |
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per = vec_lvsl(pos, s);\ |
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} |
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#define UPDATE_PTR(s0, d0, s1, d1) {\ |
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d0 = s0;\ |
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d1 = s1;\ |
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} |
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#define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\ |
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v1 = vec_ld(pos + a + 16, s);\ |
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vf = vec_perm(v0, v1, per);\ |
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} |
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#define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) {\ |
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if ((((uintptr_t)s + pos) % 16) > 8) {\ |
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v1 = vec_ld(pos + a + 16, s);\ |
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}\ |
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vf = vec_perm(v0, src_v1, per);\ |
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} |
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#define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\ |
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vf1 = vec_ld((a * 2 * filterSize) + (b * 2) + 16 + off, f);\ |
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vf = vec_perm(vf0, vf1, per);\ |
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} |
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#define FUNC(name) name ## _altivec |
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#include "swscale_ppc_template.c" |
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#undef FUNC |
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#undef vzero |
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#endif /* HAVE_BIGENDIAN */ |
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#define SHIFT 3 |
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#define get_pixel(val, bias, signedness) \ |
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(bias + av_clip_ ## signedness ## 16(val >> shift)) |
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static void |
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yuv2plane1_float_u(const int32_t *src, float *dest, int dstW, int start) |
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{ |
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static const int shift = 3; |
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static const float float_mult = 1.0f / 65535.0f; |
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int i, val; |
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uint16_t val_uint; |
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for (i = start; i < dstW; ++i){ |
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val = src[i] + (1 << (shift - 1)); |
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val_uint = get_pixel(val, 0, uint); |
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dest[i] = float_mult * (float)val_uint; |
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} |
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} |
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static void |
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yuv2plane1_float_bswap_u(const int32_t *src, uint32_t *dest, int dstW, int start) |
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{ |
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static const int shift = 3; |
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static const float float_mult = 1.0f / 65535.0f; |
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int i, val; |
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uint16_t val_uint; |
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for (i = start; i < dstW; ++i){ |
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val = src[i] + (1 << (shift - 1)); |
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val_uint = get_pixel(val, 0, uint); |
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dest[i] = av_bswap32(av_float2int(float_mult * (float)val_uint)); |
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} |
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} |
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static void yuv2plane1_float_altivec(const int32_t *src, float *dest, int dstW) |
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{ |
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const int dst_u = -(uintptr_t)dest & 3; |
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const int add = (1 << (SHIFT - 1)); |
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const int clip = (1 << 16) - 1; |
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const float fmult = 1.0f / 65535.0f; |
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const vec_u32 vadd = (vec_u32) {add, add, add, add}; |
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const vec_u32 vshift = (vec_u32) vec_splat_u32(SHIFT); |
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const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip}; |
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const vec_f vmul = (vec_f) {fmult, fmult, fmult, fmult}; |
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const vec_f vzero = (vec_f) {0, 0, 0, 0}; |
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vec_u32 v; |
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vec_f vd; |
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int i; |
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yuv2plane1_float_u(src, dest, dst_u, 0); |
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for (i = dst_u; i < dstW - 3; i += 4) { |
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v = vec_ld(0, (const uint32_t *) &src[i]); |
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v = vec_add(v, vadd); |
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v = vec_sr(v, vshift); |
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v = vec_min(v, vlargest); |
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vd = vec_ctf(v, 0); |
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vd = vec_madd(vd, vmul, vzero); |
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vec_st(vd, 0, &dest[i]); |
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} |
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yuv2plane1_float_u(src, dest, dstW, i); |
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} |
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static void yuv2plane1_float_bswap_altivec(const int32_t *src, uint32_t *dest, int dstW) |
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{ |
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const int dst_u = -(uintptr_t)dest & 3; |
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const int add = (1 << (SHIFT - 1)); |
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const int clip = (1 << 16) - 1; |
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const float fmult = 1.0f / 65535.0f; |
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const vec_u32 vadd = (vec_u32) {add, add, add, add}; |
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const vec_u32 vshift = (vec_u32) vec_splat_u32(SHIFT); |
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const vec_u32 vlargest = (vec_u32) {clip, clip, clip, clip}; |
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const vec_f vmul = (vec_f) {fmult, fmult, fmult, fmult}; |
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const vec_f vzero = (vec_f) {0, 0, 0, 0}; |
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const vec_u32 vswapbig = (vec_u32) {16, 16, 16, 16}; |
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const vec_u16 vswapsmall = vec_splat_u16(8); |
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vec_u32 v; |
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vec_f vd; |
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int i; |
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yuv2plane1_float_bswap_u(src, dest, dst_u, 0); |
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for (i = dst_u; i < dstW - 3; i += 4) { |
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v = vec_ld(0, (const uint32_t *) &src[i]); |
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v = vec_add(v, vadd); |
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v = vec_sr(v, vshift); |
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v = vec_min(v, vlargest); |
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vd = vec_ctf(v, 0); |
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vd = vec_madd(vd, vmul, vzero); |
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vd = (vec_f) vec_rl((vec_u32) vd, vswapbig); |
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vd = (vec_f) vec_rl((vec_u16) vd, vswapsmall); |
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vec_st(vd, 0, (float *) &dest[i]); |
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} |
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yuv2plane1_float_bswap_u(src, dest, dstW, i); |
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} |
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#define yuv2plane1_float(template, dest_type, BE_LE) \ |
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static void yuv2plane1_float ## BE_LE ## _altivec(const int16_t *src, uint8_t *dest, \ |
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int dstW, \ |
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const uint8_t *dither, int offset) \ |
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{ \ |
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template((const int32_t *)src, (dest_type *)dest, dstW); \ |
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} |
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#if HAVE_BIGENDIAN |
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yuv2plane1_float(yuv2plane1_float_altivec, float, BE) |
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yuv2plane1_float(yuv2plane1_float_bswap_altivec, uint32_t, LE) |
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#else |
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yuv2plane1_float(yuv2plane1_float_altivec, float, LE) |
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yuv2plane1_float(yuv2plane1_float_bswap_altivec, uint32_t, BE) |
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#endif |
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#endif /* HAVE_ALTIVEC */ |
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av_cold void ff_sws_init_swscale_ppc(SwsInternal *c) |
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{ |
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#if HAVE_ALTIVEC |
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enum AVPixelFormat dstFormat = c->opts.dst_format; |
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if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC)) |
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return; |
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#if HAVE_BIGENDIAN |
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if (c->srcBpc == 8 && c->dstBpc <= 14) { |
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c->hyScale = c->hcScale = hScale_real_altivec; |
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} |
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if (!is16BPS(dstFormat) && !isNBPS(dstFormat) && !isSemiPlanarYUV(dstFormat) && |
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dstFormat != AV_PIX_FMT_GRAYF32BE && dstFormat != AV_PIX_FMT_GRAYF32LE && |
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!c->needAlpha) { |
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c->yuv2planeX = yuv2planeX_altivec; |
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} |
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#endif |
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if (dstFormat == AV_PIX_FMT_GRAYF32BE) { |
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c->yuv2plane1 = yuv2plane1_floatBE_altivec; |
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} else if (dstFormat == AV_PIX_FMT_GRAYF32LE) { |
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c->yuv2plane1 = yuv2plane1_floatLE_altivec; |
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} |
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/* The following list of supported dstFormat values should |
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* match what's found in the body of ff_yuv2packedX_altivec() */ |
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if (!(c->opts.flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) { |
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switch (c->opts.dst_format) { |
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case AV_PIX_FMT_ABGR: |
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c->yuv2packedX = ff_yuv2abgr_X_altivec; |
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break; |
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case AV_PIX_FMT_BGRA: |
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c->yuv2packedX = ff_yuv2bgra_X_altivec; |
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break; |
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case AV_PIX_FMT_ARGB: |
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c->yuv2packedX = ff_yuv2argb_X_altivec; |
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break; |
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case AV_PIX_FMT_RGBA: |
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c->yuv2packedX = ff_yuv2rgba_X_altivec; |
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break; |
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case AV_PIX_FMT_BGR24: |
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c->yuv2packedX = ff_yuv2bgr24_X_altivec; |
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break; |
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case AV_PIX_FMT_RGB24: |
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c->yuv2packedX = ff_yuv2rgb24_X_altivec; |
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break; |
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} |
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} |
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#endif /* HAVE_ALTIVEC */ |
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ff_sws_init_swscale_vsx(c); |
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}
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