mirror of https://git.ffmpeg.org/ffmpeg.git
307 lines
9.5 KiB
C
307 lines
9.5 KiB
C
/*
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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_VSX
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#define vzero vec_splat_s32(0)
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#if !HAVE_BIGENDIAN
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#define GET_LS(a,b,c,s) {\
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ls = a;\
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a = vec_vsx_ld(((b) << 1) + 16, s);\
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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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GET_LS(l1, x, perm, src);\
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vector signed int i1 = vec_mule(filter, ls);\
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vector signed int i2 = vec_mulo(filter, ls);\
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vector signed int vf1, vf2;\
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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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vf = vec_vsx_ld(joffset, f);\
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}
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#define LOAD_L1(ll1,s,p){\
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ll1 = vec_vsx_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 = (vector signed short)vec_vsx_ld(a << 3, f);\
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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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#define UPDATE_PTR(s0, d0, s1, d1) {}
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#define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\
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vf = vec_vsx_ld(pos + a, s);\
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}
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#define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) LOAD_SRCV(pos, a, s, per, v0, v1, vf)
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#define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\
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vf = vec_vsx_ld((a * 2 * filterSize) + (b * 2) + off, f);\
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}
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#define FUNC(name) name ## _vsx
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#include "swscale_ppc_template.c"
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#undef FUNC
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#endif /* !HAVE_BIGENDIAN */
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static void yuv2plane1_8_u(const int16_t *src, uint8_t *dest, int dstW,
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const uint8_t *dither, int offset, int start)
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{
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int i;
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for (i = start; i < dstW; i++) {
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int val = (src[i] + dither[(i + offset) & 7]) >> 7;
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dest[i] = av_clip_uint8(val);
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}
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}
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static void yuv2plane1_8_vsx(const int16_t *src, uint8_t *dest, int dstW,
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const uint8_t *dither, int offset)
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{
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const int dst_u = -(uintptr_t)dest & 15;
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int i, j;
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LOCAL_ALIGNED(16, int16_t, val, [16]);
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const vector uint16_t shifts = (vector uint16_t) {7, 7, 7, 7, 7, 7, 7, 7};
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vector int16_t vi, vileft, ditherleft, ditherright;
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vector uint8_t vd;
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for (j = 0; j < 16; j++) {
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val[j] = dither[(dst_u + offset + j) & 7];
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}
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ditherleft = vec_ld(0, val);
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ditherright = vec_ld(0, &val[8]);
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yuv2plane1_8_u(src, dest, dst_u, dither, offset, 0);
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for (i = dst_u; i < dstW - 15; i += 16) {
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vi = vec_vsx_ld(0, &src[i]);
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vi = vec_adds(ditherleft, vi);
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vileft = vec_sra(vi, shifts);
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vi = vec_vsx_ld(0, &src[i + 8]);
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vi = vec_adds(ditherright, vi);
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vi = vec_sra(vi, shifts);
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vd = vec_packsu(vileft, vi);
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vec_st(vd, 0, &dest[i]);
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}
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yuv2plane1_8_u(src, dest, dstW, dither, offset, i);
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}
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#if !HAVE_BIGENDIAN
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#define output_pixel(pos, val) \
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if (big_endian) { \
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AV_WB16(pos, av_clip_uintp2(val >> shift, output_bits)); \
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} else { \
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AV_WL16(pos, av_clip_uintp2(val >> shift, output_bits)); \
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}
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static void yuv2plane1_nbps_u(const int16_t *src, uint16_t *dest, int dstW,
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int big_endian, int output_bits, int start)
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{
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int i;
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int shift = 15 - output_bits;
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for (i = start; i < dstW; i++) {
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int val = src[i] + (1 << (shift - 1));
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output_pixel(&dest[i], val);
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}
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}
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static void yuv2plane1_nbps_vsx(const int16_t *src, uint16_t *dest, int dstW,
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int big_endian, int output_bits)
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{
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const int dst_u = -(uintptr_t)dest & 7;
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const int shift = 15 - output_bits;
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const int add = (1 << (shift - 1));
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const int clip = (1 << output_bits) - 1;
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const vector uint16_t vadd = (vector uint16_t) {add, add, add, add, add, add, add, add};
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const vector uint16_t vswap = (vector uint16_t) vec_splat_u16(big_endian ? 8 : 0);
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const vector uint16_t vshift = (vector uint16_t) vec_splat_u16(shift);
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const vector uint16_t vlargest = (vector uint16_t) {clip, clip, clip, clip, clip, clip, clip, clip};
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vector uint16_t v;
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int i;
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yuv2plane1_nbps_u(src, dest, dst_u, big_endian, output_bits, 0);
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for (i = dst_u; i < dstW - 7; i += 8) {
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v = vec_vsx_ld(0, (const uint16_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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v = vec_rl(v, vswap);
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vec_st(v, 0, &dest[i]);
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}
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yuv2plane1_nbps_u(src, dest, dstW, big_endian, output_bits, i);
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}
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#undef output_pixel
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#define output_pixel(pos, val, bias, signedness) \
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if (big_endian) { \
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AV_WB16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \
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} else { \
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AV_WL16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \
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}
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static void yuv2plane1_16_u(const int32_t *src, uint16_t *dest, int dstW,
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int big_endian, int output_bits, int start)
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{
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int i;
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const int shift = 3;
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for (i = start; i < dstW; i++) {
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int val = src[i] + (1 << (shift - 1));
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output_pixel(&dest[i], val, 0, uint);
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}
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}
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static void yuv2plane1_16_vsx(const int32_t *src, uint16_t *dest, int dstW,
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int big_endian, int output_bits)
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{
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const int dst_u = -(uintptr_t)dest & 7;
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const int shift = 3;
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const int add = (1 << (shift - 1));
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const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
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const vector uint16_t vswap = (vector uint16_t) vec_splat_u16(big_endian ? 8 : 0);
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const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift);
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vector uint32_t v, v2;
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vector uint16_t vd;
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int i;
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yuv2plane1_16_u(src, dest, dst_u, big_endian, output_bits, 0);
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for (i = dst_u; i < dstW - 7; i += 8) {
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v = vec_vsx_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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v2 = vec_vsx_ld(0, (const uint32_t *) &src[i + 4]);
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v2 = vec_add(v2, vadd);
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v2 = vec_sr(v2, vshift);
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vd = vec_packsu(v, v2);
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vd = vec_rl(vd, vswap);
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vec_st(vd, 0, &dest[i]);
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}
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yuv2plane1_16_u(src, dest, dstW, big_endian, output_bits, i);
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}
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#define yuv2NBPS(bits, BE_LE, is_be, template_size, typeX_t) \
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static void yuv2plane1_ ## bits ## BE_LE ## _vsx(const int16_t *src, \
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uint8_t *dest, int dstW, \
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const uint8_t *dither, int offset) \
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{ \
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yuv2plane1_ ## template_size ## _vsx((const typeX_t *) src, \
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(uint16_t *) dest, dstW, is_be, bits); \
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}
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yuv2NBPS( 9, BE, 1, nbps, int16_t)
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yuv2NBPS( 9, LE, 0, nbps, int16_t)
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yuv2NBPS(10, BE, 1, nbps, int16_t)
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yuv2NBPS(10, LE, 0, nbps, int16_t)
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yuv2NBPS(12, BE, 1, nbps, int16_t)
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yuv2NBPS(12, LE, 0, nbps, int16_t)
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yuv2NBPS(14, BE, 1, nbps, int16_t)
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yuv2NBPS(14, LE, 0, nbps, int16_t)
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yuv2NBPS(16, BE, 1, 16, int32_t)
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yuv2NBPS(16, LE, 0, 16, int32_t)
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#endif /* !HAVE_BIGENDIAN */
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#endif /* HAVE_VSX */
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av_cold void ff_sws_init_swscale_vsx(SwsContext *c)
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{
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#if HAVE_VSX
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enum AVPixelFormat dstFormat = c->dstFormat;
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if (!(av_get_cpu_flags() & AV_CPU_FLAG_VSX))
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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_vsx;
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}
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if (!is16BPS(dstFormat) && !isNBPS(dstFormat) &&
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dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
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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_vsx;
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}
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#endif
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if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) {
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switch (c->dstBpc) {
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case 8:
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c->yuv2plane1 = yuv2plane1_8_vsx;
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break;
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#if !HAVE_BIGENDIAN
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case 9:
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c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_9BE_vsx : yuv2plane1_9LE_vsx;
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break;
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case 10:
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c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_10BE_vsx : yuv2plane1_10LE_vsx;
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break;
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case 12:
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c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_12BE_vsx : yuv2plane1_12LE_vsx;
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break;
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case 14:
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c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_14BE_vsx : yuv2plane1_14LE_vsx;
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break;
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case 16:
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c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_16BE_vsx : yuv2plane1_16LE_vsx;
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break;
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#endif
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}
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}
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#endif /* HAVE_VSX */
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}
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