429 lines
22 KiB
C
429 lines
22 KiB
C
/*
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* Copyright (c) 2018 Paul B Mahol
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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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* Based on paper: A Simple and Efficient Deblocking Algorithm for Low Bit-Rate Video Coding.
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*/
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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enum FilterType { WEAK, STRONG, NB_FILTER };
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typedef struct DeblockContext {
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const AVClass *class;
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const AVPixFmtDescriptor *desc;
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int filter;
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int block;
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int planes;
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float alpha;
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float beta;
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float gamma;
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float delta;
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int ath;
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int bth;
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int gth;
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int dth;
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int max;
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int depth;
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int bpc;
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int nb_planes;
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int planewidth[4];
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int planeheight[4];
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void (*deblockh)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
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int ath, int bth, int gth, int dth, int max);
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void (*deblockv)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
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int ath, int bth, int gth, int dth, int max);
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} DeblockContext;
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pixel_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
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if (!formats)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, formats);
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}
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#define WEAK_HFILTER(name, type, ldiv) \
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static void deblockh##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int x; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (x = 0; x < block; x++) { \
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int delta = dst[x] - dst[x - dst_linesize]; \
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int A, B, C, D, a, b, c, d; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
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FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= gth) \
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continue; \
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\
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A = dst[x - 2 * dst_linesize]; \
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B = dst[x - 1 * dst_linesize]; \
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C = dst[x + 0 * dst_linesize]; \
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D = dst[x + 1 * dst_linesize]; \
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\
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a = A + delta / 8; \
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b = B + delta / 2; \
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c = C - delta / 2; \
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d = D - delta / 8; \
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\
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dst[x - 2 * dst_linesize] = av_clip(a, 0, max); \
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dst[x - 1 * dst_linesize] = av_clip(b, 0, max); \
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dst[x + 0 * dst_linesize] = av_clip(c, 0, max); \
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dst[x + 1 * dst_linesize] = av_clip(d, 0, max); \
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} \
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}
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WEAK_HFILTER(8, uint8_t, 1)
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WEAK_HFILTER(16, uint16_t, 2)
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#define WEAK_VFILTER(name, type, ldiv) \
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static void deblockv##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int y; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (y = 0; y < block; y++) { \
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int delta = dst[0] - dst[-1]; \
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int A, B, C, D, a, b, c, d; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[-1] - dst[-2]) >= bth || \
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FFABS(dst[0] - dst[1]) >= gth) \
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continue; \
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\
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A = dst[-2]; \
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B = dst[-1]; \
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C = dst[+0]; \
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D = dst[+1]; \
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\
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a = A + delta / 8; \
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b = B + delta / 2; \
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c = C - delta / 2; \
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d = D - delta / 8; \
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\
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dst[-2] = av_clip(a, 0, max); \
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dst[-1] = av_clip(b, 0, max); \
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dst[+0] = av_clip(c, 0, max); \
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dst[+1] = av_clip(d, 0, max); \
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\
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dst += dst_linesize; \
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} \
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}
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WEAK_VFILTER(8, uint8_t, 1)
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WEAK_VFILTER(16, uint16_t, 2)
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#define STRONG_HFILTER(name, type, ldiv) \
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static void deblockh##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int x; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (x = 0; x < block; x++) { \
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int A, B, C, D, E, F, a, b, c, d, e, f; \
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int delta = dst[x] - dst[x - dst_linesize]; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
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FFABS(dst[x + 1 * dst_linesize] - dst[x + 2 * dst_linesize]) >= gth || \
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FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= dth) \
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continue; \
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\
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A = dst[x - 3 * dst_linesize]; \
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B = dst[x - 2 * dst_linesize]; \
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C = dst[x - 1 * dst_linesize]; \
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D = dst[x + 0 * dst_linesize]; \
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E = dst[x + 1 * dst_linesize]; \
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F = dst[x + 2 * dst_linesize]; \
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\
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a = A + delta / 8; \
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b = B + delta / 4; \
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c = C + delta / 2; \
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d = D - delta / 2; \
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e = E - delta / 4; \
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f = F - delta / 8; \
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\
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dst[x - 3 * dst_linesize] = av_clip(a, 0, max); \
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dst[x - 2 * dst_linesize] = av_clip(b, 0, max); \
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dst[x - 1 * dst_linesize] = av_clip(c, 0, max); \
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dst[x + 0 * dst_linesize] = av_clip(d, 0, max); \
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dst[x + 1 * dst_linesize] = av_clip(e, 0, max); \
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dst[x + 2 * dst_linesize] = av_clip(f, 0, max); \
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} \
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}
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STRONG_HFILTER(8, uint8_t, 1)
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STRONG_HFILTER(16, uint16_t, 2)
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#define STRONG_VFILTER(name, type, ldiv) \
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static void deblockv##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
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int ath, int bth, int gth, int dth, int max) \
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{ \
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type *dst; \
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int y; \
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\
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dst = (type *)dstp; \
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dst_linesize /= ldiv; \
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\
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for (y = 0; y < block; y++) { \
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int A, B, C, D, E, F, a, b, c, d, e, f; \
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int delta = dst[0] - dst[-1]; \
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\
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if (FFABS(delta) >= ath || \
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FFABS(dst[-1] - dst[-2]) >= bth || \
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FFABS(dst[+1] - dst[+2]) >= gth || \
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FFABS(dst[+0] - dst[+1]) >= dth) \
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continue; \
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\
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A = dst[-3]; \
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B = dst[-2]; \
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C = dst[-1]; \
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D = dst[+0]; \
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E = dst[+1]; \
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F = dst[+2]; \
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\
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a = A + delta / 8; \
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b = B + delta / 4; \
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c = C + delta / 2; \
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d = D - delta / 2; \
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e = E - delta / 4; \
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f = F - delta / 8; \
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\
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dst[-3] = av_clip(a, 0, max); \
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dst[-2] = av_clip(b, 0, max); \
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dst[-1] = av_clip(c, 0, max); \
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dst[+0] = av_clip(d, 0, max); \
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dst[+1] = av_clip(e, 0, max); \
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dst[+2] = av_clip(f, 0, max); \
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\
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dst += dst_linesize; \
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} \
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}
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STRONG_VFILTER(8, uint8_t, 1)
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STRONG_VFILTER(16, uint16_t, 2)
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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DeblockContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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s->desc = av_pix_fmt_desc_get(outlink->format);
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if (!s->desc)
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return AVERROR_BUG;
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s->nb_planes = av_pix_fmt_count_planes(outlink->format);
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s->depth = s->desc->comp[0].depth;
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s->bpc = (s->depth + 7) / 8;
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s->max = (1 << s->depth) - 1;
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s->ath = s->alpha * s->max;
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s->bth = s->beta * s->max;
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s->gth = s->gamma * s->max;
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s->dth = s->delta * s->max;
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if (s->depth <= 8 && s->filter == WEAK) {
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s->deblockh = deblockh8_weak;
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s->deblockv = deblockv8_weak;
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} else if (s->depth > 8 && s->filter == WEAK) {
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s->deblockh = deblockh16_weak;
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s->deblockv = deblockv16_weak;
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}
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if (s->depth <= 8 && s->filter == STRONG) {
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s->deblockh = deblockh8_strong;
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s->deblockv = deblockv8_strong;
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} else if (s->depth > 8 && s->filter == STRONG) {
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s->deblockh = deblockh16_strong;
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s->deblockv = deblockv16_strong;
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}
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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DeblockContext *s = ctx->priv;
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const int block = s->block;
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AVFrame *out;
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int plane, x, y;
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if (av_frame_is_writable(in)) {
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out = in;
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} else {
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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}
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for (plane = 0; plane < s->nb_planes; plane++) {
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const int width = s->planewidth[plane];
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const int height = s->planeheight[plane];
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const uint8_t *src = (const uint8_t *)in->data[plane];
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uint8_t *dst = (uint8_t *)out->data[plane];
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if (in != out)
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av_image_copy_plane(dst, out->linesize[plane],
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src, in->linesize[plane],
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width * s->bpc, height);
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if (!((1 << plane) & s->planes))
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continue;
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for (x = block; x < width; x += block)
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s->deblockv(dst + x * s->bpc, out->linesize[plane],
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FFMIN(block, height), s->ath, s->bth, s->gth, s->dth, s->max);
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for (y = block; y < height; y += block) {
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dst += out->linesize[plane] * block;
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s->deblockh(dst, out->linesize[plane],
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FFMIN(block, width),
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s->ath, s->bth, s->gth, s->dth, s->max);
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for (x = block; x < width; x += block) {
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s->deblockh(dst + x * s->bpc, out->linesize[plane],
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FFMIN(block, width - x),
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s->ath, s->bth, s->gth, s->dth, s->max);
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s->deblockv(dst + x * s->bpc, out->linesize[plane],
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FFMIN(block, height - y),
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s->ath, s->bth, s->gth, s->dth, s->max);
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}
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}
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}
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if (in != out)
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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int ret;
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ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
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if (ret < 0)
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return ret;
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return config_output(ctx->outputs[0]);
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}
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#define OFFSET(x) offsetof(DeblockContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption deblock_options[] = {
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{ "filter", "set type of filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=STRONG},0, 1, FLAGS, "filter" },
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{ "weak", 0, 0, AV_OPT_TYPE_CONST, {.i64=WEAK}, 0, 0, FLAGS, "filter" },
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{ "strong", 0, 0, AV_OPT_TYPE_CONST, {.i64=STRONG},0, 0, FLAGS, "filter" },
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{ "block", "set size of block", OFFSET(block), AV_OPT_TYPE_INT, {.i64=8}, 4, 512, FLAGS },
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{ "alpha", "set 1st detection threshold", OFFSET(alpha), AV_OPT_TYPE_FLOAT, {.dbl=.098}, 0, 1, FLAGS },
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{ "beta", "set 2nd detection threshold", OFFSET(beta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
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{ "gamma", "set 3rd detection threshold", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
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{ "delta", "set 4th detection threshold", OFFSET(delta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
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{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS },
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{ NULL },
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};
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(deblock);
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AVFilter ff_vf_deblock = {
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.name = "deblock",
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.description = NULL_IF_CONFIG_SMALL("Deblock video."),
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|
.priv_size = sizeof(DeblockContext),
|
|
.priv_class = &deblock_class,
|
|
.query_formats = query_formats,
|
|
.inputs = inputs,
|
|
.outputs = outputs,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
|
.process_command = process_command,
|
|
};
|