From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- media/ffvpx/libavcodec/simple_idct.c | 269 +++++++++++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 media/ffvpx/libavcodec/simple_idct.c (limited to 'media/ffvpx/libavcodec/simple_idct.c') diff --git a/media/ffvpx/libavcodec/simple_idct.c b/media/ffvpx/libavcodec/simple_idct.c new file mode 100644 index 0000000000..eb13cff146 --- /dev/null +++ b/media/ffvpx/libavcodec/simple_idct.c @@ -0,0 +1,269 @@ +/* + * Simple IDCT + * + * Copyright (c) 2001 Michael Niedermayer + * + * 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 + */ + +/** + * @file + * simpleidct in C. + */ + +#include "libavutil/intreadwrite.h" +#include "mathops.h" +#include "simple_idct.h" + +#define IN_IDCT_DEPTH 16 + +#define BIT_DEPTH 8 +#include "simple_idct_template.c" +#undef BIT_DEPTH + +#define BIT_DEPTH 10 +#include "simple_idct_template.c" + +#define EXTRA_SHIFT 2 +#include "simple_idct_template.c" + +#undef EXTRA_SHIFT +#undef BIT_DEPTH + +#define BIT_DEPTH 12 +#include "simple_idct_template.c" +#undef BIT_DEPTH +#undef IN_IDCT_DEPTH + +#define IN_IDCT_DEPTH 32 +#define BIT_DEPTH 10 +#include "simple_idct_template.c" +#undef BIT_DEPTH +#undef IN_IDCT_DEPTH + +/* 2x4x8 idct */ + +#define CN_SHIFT 12 +#define C_FIX(x) ((int)((x) * (1 << CN_SHIFT) + 0.5)) +#define C1 C_FIX(0.6532814824) +#define C2 C_FIX(0.2705980501) + +/* row idct is multiple by 16 * sqrt(2.0), col idct4 is normalized, + and the butterfly must be multiplied by 0.5 * sqrt(2.0) */ +#define C_SHIFT (4+1+12) + +static inline void idct4col_put(uint8_t *dest, ptrdiff_t line_size, const int16_t *col) +{ + int c0, c1, c2, c3, a0, a1, a2, a3; + + a0 = col[8*0]; + a1 = col[8*2]; + a2 = col[8*4]; + a3 = col[8*6]; + c0 = ((a0 + a2) * (1 << CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); + c2 = ((a0 - a2) * (1 << CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); + c1 = a1 * C1 + a3 * C2; + c3 = a1 * C2 - a3 * C1; + dest[0] = av_clip_uint8((c0 + c1) >> C_SHIFT); + dest += line_size; + dest[0] = av_clip_uint8((c2 + c3) >> C_SHIFT); + dest += line_size; + dest[0] = av_clip_uint8((c2 - c3) >> C_SHIFT); + dest += line_size; + dest[0] = av_clip_uint8((c0 - c1) >> C_SHIFT); +} + +#define BF(k) \ +{\ + int a0, a1;\ + a0 = ptr[k];\ + a1 = ptr[8 + k];\ + ptr[k] = a0 + a1;\ + ptr[8 + k] = a0 - a1;\ +} + +/* only used by DV codec. The input must be interlaced. 128 is added + to the pixels before clamping to avoid systematic error + (1024*sqrt(2)) offset would be needed otherwise. */ +/* XXX: I think a 1.0/sqrt(2) normalization should be needed to + compensate the extra butterfly stage - I don't have the full DV + specification */ +void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block) +{ + int i; + int16_t *ptr; + + /* butterfly */ + ptr = block; + for(i=0;i<4;i++) { + BF(0); + BF(1); + BF(2); + BF(3); + BF(4); + BF(5); + BF(6); + BF(7); + ptr += 2 * 8; + } + + /* IDCT8 on each line */ + for(i=0; i<8; i++) { + idctRowCondDC_int16_8bit(block + i*8, 0); + } + + /* IDCT4 and store */ + for(i=0;i<8;i++) { + idct4col_put(dest + i, 2 * line_size, block + i); + idct4col_put(dest + line_size + i, 2 * line_size, block + 8 + i); + } +} + +/* 8x4 & 4x8 WMV2 IDCT */ +#undef CN_SHIFT +#undef C_SHIFT +#undef C_FIX +#undef C1 +#undef C2 +#define CN_SHIFT 12 +#define C_FIX(x) ((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5)) +#define C1 C_FIX(0.6532814824) +#define C2 C_FIX(0.2705980501) +#define C3 C_FIX(0.5) +#define C_SHIFT (4+1+12) +static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_t *col) +{ + int c0, c1, c2, c3, a0, a1, a2, a3; + + a0 = col[8*0]; + a1 = col[8*1]; + a2 = col[8*2]; + a3 = col[8*3]; + c0 = (a0 + a2)*C3 + (1 << (C_SHIFT - 1)); + c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1)); + c1 = a1 * C1 + a3 * C2; + c3 = a1 * C2 - a3 * C1; + dest[0] = av_clip_uint8(dest[0] + ((c0 + c1) >> C_SHIFT)); + dest += line_size; + dest[0] = av_clip_uint8(dest[0] + ((c2 + c3) >> C_SHIFT)); + dest += line_size; + dest[0] = av_clip_uint8(dest[0] + ((c2 - c3) >> C_SHIFT)); + dest += line_size; + dest[0] = av_clip_uint8(dest[0] + ((c0 - c1) >> C_SHIFT)); +} + +#define RN_SHIFT 15 +#define R_FIX(x) ((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5)) +#define R1 R_FIX(0.6532814824) +#define R2 R_FIX(0.2705980501) +#define R3 R_FIX(0.5) +#define R_SHIFT 11 +static inline void idct4row(int16_t *row) +{ + unsigned c0, c1, c2, c3; + int a0, a1, a2, a3; + + a0 = row[0]; + a1 = row[1]; + a2 = row[2]; + a3 = row[3]; + c0 = (a0 + a2)*R3 + (1 << (R_SHIFT - 1)); + c2 = (a0 - a2)*R3 + (1 << (R_SHIFT - 1)); + c1 = a1 * R1 + a3 * R2; + c3 = a1 * R2 - a3 * R1; + row[0]= (c0 + c1) >> R_SHIFT; + row[1]= (c2 + c3) >> R_SHIFT; + row[2]= (c2 - c3) >> R_SHIFT; + row[3]= (c0 - c1) >> R_SHIFT; +} + +void ff_simple_idct84_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) +{ + int i; + + /* IDCT8 on each line */ + for(i=0; i<4; i++) { + idctRowCondDC_int16_8bit(block + i*8, 0); + } + + /* IDCT4 and store */ + for(i=0;i<8;i++) { + idct4col_add(dest + i, line_size, block + i); + } +} + +void ff_simple_idct48_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) +{ + int i; + + /* IDCT4 on each line */ + for(i=0; i<8; i++) { + idct4row(block + i*8); + } + + /* IDCT8 and store */ + for(i=0; i<4; i++){ + idctSparseColAdd_int16_8bit(dest + i, line_size, block + i); + } +} + +void ff_simple_idct44_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) +{ + int i; + + /* IDCT4 on each line */ + for(i=0; i<4; i++) { + idct4row(block + i*8); + } + + /* IDCT4 and store */ + for(i=0; i<4; i++){ + idct4col_add(dest + i, line_size, block + i); + } +} + +void ff_prores_idct_10(int16_t *block, const int16_t *qmat) +{ + int i; + + for (i = 0; i < 64; i++) + block[i] *= qmat[i]; + + for (i = 0; i < 8; i++) + idctRowCondDC_extrashift_10(block + i*8, 2); + + for (i = 0; i < 8; i++) { + block[i] += 8192; + idctSparseCol_extrashift_10(block + i); + } +} + +void ff_prores_idct_12(int16_t *block, const int16_t *qmat) +{ + int i; + + for (i = 0; i < 64; i++) + block[i] *= qmat[i]; + + for (i = 0; i < 8; i++) + idctRowCondDC_int16_12bit(block + i*8, 0); + + for (i = 0; i < 8; i++) { + block[i] += 8192; + idctSparseCol_int16_12bit(block + i); + } +} -- cgit v1.2.3