forked from KolibriOS/kolibrios
297 lines
9.5 KiB
C
297 lines
9.5 KiB
C
/*
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* Copyright (c) 2004 The FFmpeg Project
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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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/**
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* @file
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* Standard C DSP-oriented functions cribbed from the original VP3
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* source code.
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "rnd_avg.h"
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#include "vp3dsp.h"
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#define IdctAdjustBeforeShift 8
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#define xC1S7 64277
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#define xC2S6 60547
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#define xC3S5 54491
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#define xC4S4 46341
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#define xC5S3 36410
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#define xC6S2 25080
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#define xC7S1 12785
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#define M(a, b) (((a) * (b)) >> 16)
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static av_always_inline void idct(uint8_t *dst, int stride,
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int16_t *input, int type)
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{
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int16_t *ip = input;
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int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;
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int Ed, Gd, Add, Bdd, Fd, Hd;
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int i;
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/* Inverse DCT on the rows now */
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for (i = 0; i < 8; i++) {
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/* Check for non-zero values */
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if (ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8] |
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ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8]) {
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A = M(xC1S7, ip[1 * 8]) + M(xC7S1, ip[7 * 8]);
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B = M(xC7S1, ip[1 * 8]) - M(xC1S7, ip[7 * 8]);
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C = M(xC3S5, ip[3 * 8]) + M(xC5S3, ip[5 * 8]);
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D = M(xC3S5, ip[5 * 8]) - M(xC5S3, ip[3 * 8]);
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Ad = M(xC4S4, (A - C));
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Bd = M(xC4S4, (B - D));
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Cd = A + C;
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Dd = B + D;
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E = M(xC4S4, (ip[0 * 8] + ip[4 * 8]));
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F = M(xC4S4, (ip[0 * 8] - ip[4 * 8]));
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G = M(xC2S6, ip[2 * 8]) + M(xC6S2, ip[6 * 8]);
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H = M(xC6S2, ip[2 * 8]) - M(xC2S6, ip[6 * 8]);
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Ed = E - G;
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Gd = E + G;
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Add = F + Ad;
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Bdd = Bd - H;
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Fd = F - Ad;
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Hd = Bd + H;
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/* Final sequence of operations over-write original inputs. */
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ip[0 * 8] = Gd + Cd;
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ip[7 * 8] = Gd - Cd;
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ip[1 * 8] = Add + Hd;
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ip[2 * 8] = Add - Hd;
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ip[3 * 8] = Ed + Dd;
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ip[4 * 8] = Ed - Dd;
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ip[5 * 8] = Fd + Bdd;
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ip[6 * 8] = Fd - Bdd;
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}
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ip += 1; /* next row */
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}
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ip = input;
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for (i = 0; i < 8; i++) {
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/* Check for non-zero values (bitwise or faster than ||) */
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if (ip[1] | ip[2] | ip[3] |
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ip[4] | ip[5] | ip[6] | ip[7]) {
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A = M(xC1S7, ip[1]) + M(xC7S1, ip[7]);
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B = M(xC7S1, ip[1]) - M(xC1S7, ip[7]);
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C = M(xC3S5, ip[3]) + M(xC5S3, ip[5]);
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D = M(xC3S5, ip[5]) - M(xC5S3, ip[3]);
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Ad = M(xC4S4, (A - C));
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Bd = M(xC4S4, (B - D));
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Cd = A + C;
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Dd = B + D;
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E = M(xC4S4, (ip[0] + ip[4])) + 8;
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F = M(xC4S4, (ip[0] - ip[4])) + 8;
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if (type == 1) { // HACK
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E += 16 * 128;
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F += 16 * 128;
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}
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G = M(xC2S6, ip[2]) + M(xC6S2, ip[6]);
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H = M(xC6S2, ip[2]) - M(xC2S6, ip[6]);
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Ed = E - G;
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Gd = E + G;
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Add = F + Ad;
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Bdd = Bd - H;
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Fd = F - Ad;
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Hd = Bd + H;
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/* Final sequence of operations over-write original inputs. */
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if (type == 1) {
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dst[0 * stride] = av_clip_uint8((Gd + Cd) >> 4);
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dst[7 * stride] = av_clip_uint8((Gd - Cd) >> 4);
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dst[1 * stride] = av_clip_uint8((Add + Hd) >> 4);
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dst[2 * stride] = av_clip_uint8((Add - Hd) >> 4);
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dst[3 * stride] = av_clip_uint8((Ed + Dd) >> 4);
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dst[4 * stride] = av_clip_uint8((Ed - Dd) >> 4);
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dst[5 * stride] = av_clip_uint8((Fd + Bdd) >> 4);
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dst[6 * stride] = av_clip_uint8((Fd - Bdd) >> 4);
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} else {
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dst[0 * stride] = av_clip_uint8(dst[0 * stride] + ((Gd + Cd) >> 4));
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dst[7 * stride] = av_clip_uint8(dst[7 * stride] + ((Gd - Cd) >> 4));
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dst[1 * stride] = av_clip_uint8(dst[1 * stride] + ((Add + Hd) >> 4));
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dst[2 * stride] = av_clip_uint8(dst[2 * stride] + ((Add - Hd) >> 4));
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dst[3 * stride] = av_clip_uint8(dst[3 * stride] + ((Ed + Dd) >> 4));
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dst[4 * stride] = av_clip_uint8(dst[4 * stride] + ((Ed - Dd) >> 4));
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dst[5 * stride] = av_clip_uint8(dst[5 * stride] + ((Fd + Bdd) >> 4));
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dst[6 * stride] = av_clip_uint8(dst[6 * stride] + ((Fd - Bdd) >> 4));
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}
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} else {
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if (type == 1) {
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dst[0*stride] =
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dst[1*stride] =
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dst[2*stride] =
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dst[3*stride] =
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dst[4*stride] =
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dst[5*stride] =
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dst[6*stride] =
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dst[7*stride] = av_clip_uint8(128 + ((xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20));
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} else {
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if (ip[0]) {
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int v = (xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20;
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dst[0 * stride] = av_clip_uint8(dst[0 * stride] + v);
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dst[1 * stride] = av_clip_uint8(dst[1 * stride] + v);
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dst[2 * stride] = av_clip_uint8(dst[2 * stride] + v);
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dst[3 * stride] = av_clip_uint8(dst[3 * stride] + v);
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dst[4 * stride] = av_clip_uint8(dst[4 * stride] + v);
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dst[5 * stride] = av_clip_uint8(dst[5 * stride] + v);
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dst[6 * stride] = av_clip_uint8(dst[6 * stride] + v);
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dst[7 * stride] = av_clip_uint8(dst[7 * stride] + v);
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}
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}
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}
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ip += 8; /* next column */
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dst++;
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}
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}
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static void vp3_idct_put_c(uint8_t *dest /* align 8 */, int line_size,
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int16_t *block /* align 16 */)
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{
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idct(dest, line_size, block, 1);
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memset(block, 0, sizeof(*block) * 64);
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}
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static void vp3_idct_add_c(uint8_t *dest /* align 8 */, int line_size,
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int16_t *block /* align 16 */)
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{
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idct(dest, line_size, block, 2);
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memset(block, 0, sizeof(*block) * 64);
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}
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static void vp3_idct_dc_add_c(uint8_t *dest /* align 8 */, int line_size,
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int16_t *block /* align 16 */)
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{
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int i, dc = (block[0] + 15) >> 5;
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for (i = 0; i < 8; i++) {
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dest[0] = av_clip_uint8(dest[0] + dc);
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dest[1] = av_clip_uint8(dest[1] + dc);
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dest[2] = av_clip_uint8(dest[2] + dc);
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dest[3] = av_clip_uint8(dest[3] + dc);
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dest[4] = av_clip_uint8(dest[4] + dc);
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dest[5] = av_clip_uint8(dest[5] + dc);
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dest[6] = av_clip_uint8(dest[6] + dc);
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dest[7] = av_clip_uint8(dest[7] + dc);
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dest += line_size;
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}
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block[0] = 0;
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}
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static void vp3_v_loop_filter_c(uint8_t *first_pixel, int stride,
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int *bounding_values)
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{
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unsigned char *end;
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int filter_value;
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const int nstride = -stride;
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for (end = first_pixel + 8; first_pixel < end; first_pixel++) {
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filter_value = (first_pixel[2 * nstride] - first_pixel[stride]) +
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(first_pixel[0] - first_pixel[nstride]) * 3;
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filter_value = bounding_values[(filter_value + 4) >> 3];
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first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
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first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value);
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}
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}
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static void vp3_h_loop_filter_c(uint8_t *first_pixel, int stride,
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int *bounding_values)
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{
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unsigned char *end;
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int filter_value;
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for (end = first_pixel + 8 * stride; first_pixel != end; first_pixel += stride) {
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filter_value = (first_pixel[-2] - first_pixel[1]) +
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(first_pixel[ 0] - first_pixel[-1]) * 3;
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filter_value = bounding_values[(filter_value + 4) >> 3];
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first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
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first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
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}
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}
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static void put_no_rnd_pixels_l2(uint8_t *dst, const uint8_t *src1,
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const uint8_t *src2, ptrdiff_t stride, int h)
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{
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int i;
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for (i = 0; i < h; i++) {
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uint32_t a, b;
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a = AV_RN32(&src1[i * stride]);
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b = AV_RN32(&src2[i * stride]);
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AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b));
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a = AV_RN32(&src1[i * stride + 4]);
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b = AV_RN32(&src2[i * stride + 4]);
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AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b));
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}
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}
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av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags)
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{
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c->put_no_rnd_pixels_l2 = put_no_rnd_pixels_l2;
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c->idct_put = vp3_idct_put_c;
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c->idct_add = vp3_idct_add_c;
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c->idct_dc_add = vp3_idct_dc_add_c;
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c->v_loop_filter = vp3_v_loop_filter_c;
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c->h_loop_filter = vp3_h_loop_filter_c;
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if (ARCH_ARM)
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ff_vp3dsp_init_arm(c, flags);
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if (ARCH_PPC)
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ff_vp3dsp_init_ppc(c, flags);
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if (ARCH_X86)
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ff_vp3dsp_init_x86(c, flags);
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}
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