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95 lines
3.0 KiB
95 lines
3.0 KiB
/* |
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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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