| /* |
| * 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 vector uint32_t vadd = (vector uint32_t) {add, add, add, add}; |
| const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift); |
| const vector uint32_t vlargest = (vector uint32_t) {clip, clip, clip, clip}; |
| const vector float vmul = (vector float) {fmult, fmult, fmult, fmult}; |
| const vector float vzero = (vector float) {0, 0, 0, 0}; |
| vector uint32_t v; |
| vector float 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 vector uint32_t vadd = (vector uint32_t) {add, add, add, add}; |
| const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift); |
| const vector uint32_t vlargest = (vector uint32_t) {clip, clip, clip, clip}; |
| const vector float vmul = (vector float) {fmult, fmult, fmult, fmult}; |
| const vector float vzero = (vector float) {0, 0, 0, 0}; |
| const vector uint32_t vswapbig = (vector uint32_t) {16, 16, 16, 16}; |
| const vector uint16_t vswapsmall = vec_splat_u16(8); |
| vector uint32_t v; |
| vector float 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 = (vector float) vec_rl((vector uint32_t) vd, vswapbig); |
| vd = (vector float) vec_rl((vector uint16_t) 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); |
| } |