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8ecd383122
Affected many ffvhuff FATE tests. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/*
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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 "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/intreadwrite.h"
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#include "huffyuvencdsp.h"
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#include "mathops.h"
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#if HAVE_FAST_64BIT
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#define BITS 64
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typedef uint64_t uint_native;
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#else
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#define BITS 32
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typedef uint32_t uint_native;
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#endif
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#define RN AV_JOIN(AV_RN, BITS)
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#define RNA AV_JOIN(AV_JOIN(AV_RN, BITS), A)
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#define WNA AV_JOIN(AV_JOIN(AV_WN, BITS), A)
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// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native arithmetic size
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#define pb_7f (~(uint_native)0 / 255 * 0x7f)
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#define pb_80 (~(uint_native)0 / 255 * 0x80)
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// 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size
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#define pw_1 ((uint_native)-1 / UINT16_MAX)
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static void diff_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w){
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long i;
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#if !HAVE_FAST_UNALIGNED
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if ((uintptr_t)src2 & (sizeof(uint_native) - 1)) {
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for(i=0; i+3<w; i+=4){
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dst[i+0] = (src1[i+0]-src2[i+0]) & mask;
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dst[i+1] = (src1[i+1]-src2[i+1]) & mask;
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dst[i+2] = (src1[i+2]-src2[i+2]) & mask;
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dst[i+3] = (src1[i+3]-src2[i+3]) & mask;
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}
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}else
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#endif
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{
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uint_native pw_lsb = (mask >> 1) * pw_1;
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uint_native pw_msb = pw_lsb + pw_1;
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for (i = 0; i <= w - (int)sizeof(uint_native)/2; i += sizeof(uint_native)/2) {
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uint_native a = RNA(src1 + i);
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uint_native b = RN (src2 + i);
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WNA(dst + i, ((a | pw_msb) - (b & pw_lsb)) ^ ((a^b^pw_msb) & pw_msb));
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}
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}
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for (; i<w; i++)
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dst[i] = (src1[i] - src2[i]) & mask;
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}
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static void sub_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src1, const uint16_t *src2, unsigned mask, int w, int *left, int *left_top){
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int i;
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uint16_t l, lt;
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l = *left;
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lt = *left_top;
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for(i=0; i<w; i++){
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const int pred = mid_pred(l, src1[i], (l + src1[i] - lt) & mask);
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lt = src1[i];
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l = src2[i];
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dst[i] = (l - pred) & mask;
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}
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*left = l;
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*left_top = lt;
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}
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av_cold void ff_huffyuvencdsp_init(HuffYUVEncDSPContext *c, enum AVPixelFormat pix_fmt)
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{
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c->diff_int16 = diff_int16_c;
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c->sub_hfyu_median_pred_int16 = sub_hfyu_median_pred_int16_c;
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#if ARCH_X86
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ff_huffyuvencdsp_init_x86(c, pix_fmt);
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#endif
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}
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